阅读说明：本技术 锚碇地下连续墙基础装配式中隔墙及施工方法 (Anchorage underground diaphragm wall foundation assembled type mid-partition wall and construction method ) 是由 马超 黄新淼 李聪 唐天龙 张效次 王建军 王新龙 贺祖浩 李宝成 杨擎 陈富翔 于 2021-06-15 设计创作，主要内容包括：本发明公开了一种锚碇地下连续墙基础装配式中隔墙及施工方法,包括多块第一块体、第二块体、植筋块体和连接块体,第一块体与第二块体交错设置,分别通过嵌接机构和固连机构固定连接成一行块体行,多行块体行上下错缝地分别通过固连机构叠合成所需高度的中隔墙墙体,植筋块体分别固定在中隔墙墙体的两端上。连接块体上下依次嵌合连接成立柱,以立柱为中心的四堵中隔墙墙体通过垂直排列的相应数块支模板固定连接成十字形中隔墙墙体单元,上下多层的中隔墙单元固定连接成中隔墙。本发明不需大量使用昂贵的模板,工序衔接紧密,缩短了施工工期,降低了施工成本,显著提高了中隔墙墙体的质量,施工安全得到可靠保障。(The invention discloses an anchorage underground continuous wall foundation assembled type intermediate wall and a construction method thereof. The connection blocks are sequentially embedded from top to bottom to form a stand column, four intermediate wall bodies taking the stand column as the center are fixedly connected into a cross intermediate wall body unit through a plurality of corresponding supporting templates which are vertically arranged, and the upper and lower multi-layer intermediate wall units are fixedly connected into the intermediate wall. The invention does not need to use a large amount of expensive templates, has tightly connected working procedures, shortens the construction period, reduces the construction cost, obviously improves the quality of the mid-partition wall body, and reliably ensures the construction safety.)

1. An anchorage underground diaphragm wall foundation assembled intermediate wall is characterized by comprising a plurality of first block bodies, second block bodies, bar planting blocks and connecting blocks which are prefabricated by reinforced concrete, wherein the widths and the heights of the first block bodies, the second block bodies, the bar planting blocks and the connecting blocks are the same, the lengths of the first block bodies are larger than those of the second block bodies, and the first block bodies and the second block bodies are connected in a foundation pit in a staggered manner; adjacent surfaces of the first block body and the second block body, and adjacent surfaces of the first block body and the rib planting block or adjacent surfaces of the second block body and the rib planting block are respectively embedded with each other through the embedding mechanism and the fixed connecting mechanism and then fixedly connected into a row of block rows, and the plurality of rows of block rows are overlapped into an intermediate wall body with the required height through the fixed connecting mechanism in an up-down staggered manner; the bar planting blocks are respectively fixed on two ends of the wall body of the middle partition wall; the center of the upper side face of each connecting block is provided with a hollow sleeve extending upwards and vertically, the center of the lower side face of each connecting block is provided with a connecting block counter bore which is inward and vertically, and the connecting block counter bores of the connecting blocks and the hollow sleeves are embedded vertically and sequentially to form an upright post; taking the upright post as a center, and welding and fixedly connecting a plurality of embedded bars on the periphery of a connecting block of the upright post with a plurality of embedded bars on the end surface of an embedded bar block at the head part of the corresponding intermediate wall one by one; two side edges of a plurality of supporting templates which are arranged up and down are respectively and fixedly connected with the edge of one end of the bar planting block of the corresponding middle partition wall body through a pair of penetrating screw rods and nuts, so that four bar planting blocks adjacent to the upright post and four rows of supporting templates are fixedly connected into an octagonal prefabricated well taking the upright post as the center; the four intermediate wall bodies taking the stand columns as the centers are fixedly connected into a cross intermediate wall body unit through a plurality of vertically arranged supporting templates, and the ends of a plurality of adjacent cross intermediate wall body units in the foundation pit are connected with each other into an intermediate wall with a plurality of grids; many plant bars of the plant bar piece of mid-board outer end weld one by one with many plant bars on the underground continuous wall inner liner board on foundation ditch limit and link firmly, set up the polylith plane template of vertical arrangement between the plant bar piece both sides of mid-board outer end and the adjacent underground continuous wall inner liner board respectively, plane template one end edge and the plant bar piece one end edge that corresponds are respectively through to wearing screw nut group fixed connection, and plane template other end edge is fixed on the underground continuous wall inner liner board that corresponds the position.

2. The assembly type intermediate wall of an anchorage underground diaphragm wall foundation as claimed in claim 1, wherein the longitudinal direction of the first block, the longitudinal direction of the second block and the longitudinal direction of the tendon-planting block are respectively provided with horizontal grout connecting holes penetrating through the centers of both ends, the vertical direction of the first block, the vertical direction of the second block and the vertical direction of the tendon-planting block are respectively provided with reserved vertical grouting holes which are arranged side by side and have through upper and lower side surfaces, and the reserved vertical grouting holes are respectively communicated with the corresponding horizontal grout connecting holes.

3. The assembly type intermediate wall of an anchorage underground diaphragm wall foundation as claimed in claim 1, wherein the scarfing mechanism comprises tenons provided at one end of the first block and one end of the second block, respectively, grooves provided at the other end of the first block and the other end of the second block, respectively, to be fitted with the tenons; one end of the bar planting block is a tenon or a groove, and the other end of the bar planting block is a plane for mounting a plurality of bar planting blocks; the first block body and the second block body are spliced in a staggered mode, and the joint of the first block body and the second block body is connected in a jogged mode through a tenon and a groove; the bar planting blocks at two ends of the block row are connected with one end of the first block or the second block respectively through the jogging of the corresponding tenon grooves to form the block row, and a plurality of bar planting blocks are fixed at the other end of each bar planting block respectively.

4. The assembly type intermediate wall of an anchorage underground continuous wall foundation as claimed in claim 1, wherein the fixed connection mechanism comprises a plurality of sets of arc-shaped screws and nuts, a set of horizontal direction combination holes and a set of vertical direction combination holes are respectively formed at four corners of the longitudinal side surface of the first block, four corners of the longitudinal side surface of the second block and four corners of the longitudinal side surface of the bar-planting block, and a set of vertical direction combination holes are respectively formed at four corners of the vertical side surface of the connection block; the horizontal combined hole comprises a triangular counter bore and a horizontal arc-shaped through hole, and after the two first block bodies and the second block bodies which are adjacent left and right are spliced, the horizontal arc-shaped through holes are communicated with each other; the vertical direction combination hole comprises a triangular counter bore and a vertical arc-shaped through hole, and after the first block body and the second block body which are adjacent up and down are spliced together, or after two connecting blocks which are adjacent up and down are spliced together, the vertical arc-shaped through holes which are adjacent to each other are communicated; the arc-shaped screws respectively horizontally penetrate through horizontal arc-shaped through holes which respectively correspond to the four corners of the two longitudinal side surfaces of the first block and the four corners of the two longitudinal side surfaces of the adjacent second block, or the four corners of the two longitudinal side surfaces of the first block and the four corners of the two longitudinal side surfaces of the adjacent bar-planting block, or the four corners of the two longitudinal side surfaces of the second block and the four corners of the two longitudinal side surfaces of the adjacent bar-planting block, and are respectively fastened through nuts; therefore, the first block bodies and the second block bodies which are arranged in a staggered mode and the bar planting blocks at the two ends are fixedly connected and spliced into block rows, or vertically overlapped connecting blocks are fixedly connected into stand columns, or vertically staggered multi-row block rows are fixedly connected into an intermediate wall body with the required height.

5. The assembly type intermediate wall of an anchorage underground continuous wall foundation as claimed in claim 4, wherein the horizontal arc-shaped through hole and the vertical arc-shaped through hole are both stepped holes, the small end holes of the stepped holes are respectively communicated with the corresponding triangular counter bores, and the large end holes of the stepped holes are respectively communicated with the vertical end face of the first block, the vertical end face of the second block and the vertical end face of the bar-planting block; the big end hole of the stepped hole is also communicated with the horizontal side surface of the first block, the horizontal side surface of the second block, the horizontal side surface of the bar planting block and the horizontal side surface of the connecting block respectively.

6. The assembly type intermediate wall of an anchorage underground diaphragm wall foundation as claimed in claim 1, wherein the height of one layer of the intermediate wall unit is 2.5m to 3 m.

7. A construction method using the assembly type intermediate wall of the tie underground diaphragm wall foundation as claimed in claim 1, characterized by comprising the steps of:

1) manufacturing a reinforced concrete prefabricated block and transporting to a construction site: determining the length, width and height of the first block body, the second block body, the bar planting block and the connecting block according to the actual size of the foundation pit, completing the batch prefabrication of the required first block body, second block body, bar planting block and connecting block in a concrete prefabrication plant, and transporting the prefabricated first block body, second block body, bar planting block and connecting block to a construction site for temporary stacking; according to the design structure of the underground continuous wall, a square grid groove is reserved when a foundation pit bottom plate is poured, and the depth of the grid groove is one third of the height of the first block body;

2) and (3) constructing the column sections: firstly, a first connecting block is hoisted and positioned at the intersection of the square grid grooves, and then the connecting blocks are assembled and piled block by block to form upright column sections with the height of 2.5-3.0 m on the first connecting block in a positioning connection mode that a connecting block counter bore in the center of the lower side of a second connecting block is sleeved on a hollow sleeve on the upper side of the first connecting block; respectively aligning four side surfaces of the upright column sections, so that the adjacent vertical arc-shaped through holes of the two vertically superposed connecting blocks are communicated; then, respectively threading the arc-shaped screw rods through two adjacent vertical arc-shaped through holes, and then respectively screwing nuts for fastening to complete the fixed connection of each connecting block of the upright column section;

3) and (3) construction of block rows: according to the design position of the partition wall body, the bar planting blocks at the head part of the block row are respectively positioned in the corresponding grooves, so that the bar planting planes on one side of the bar planting blocks at the head part are respectively opposite to the planes of the connecting blocks of the adjacent upright post sections, and then the bar planting blocks, the first block body and the second block body are embedded and connected into a row of block rows, the head and the tail of which are the bar planting blocks, and the middle of which is the first block body and the second block body which are arranged in a staggered mode, in an embedded mode through the tenons and the grooves of the adjacent surfaces; then, respectively completing all bar planting of the bar planting blocks at the head part and the tail part of the block line, and completing all bar planting of the corresponding surface of the connecting block corresponding to the bar planting blocks at the head part, then welding all the bar planting of the bar planting blocks at the head part and all the bar planting of the corresponding end surface of the connecting block one by one, and welding all the bar planting of the bar planting blocks at the tail part and all the bar planting of the corresponding inner lining plate of the underground continuous wall one by one, thereby completing the splicing construction of the first line of block lines; repeating the process, and completing splicing construction of the other three rows of block bodies connected with the end faces of the connecting blocks at the bottoms of the upright column sections one by one;

4) and (3) finishing the fixed connection between the adjacent blocks in four block rows: firstly, respectively penetrating an arc-shaped screw through left and right adjacent horizontal arc-shaped through holes of each adjacent block in each block row, then respectively screwing a nut to fasten, and fixedly connecting adjacent blocks in the block rows in one row one by one to form a first layer of cross-shaped block units taking the upright column segment as the center;

5) the second layer of cross block units are piled on the first layer of cross block units in a staggered way; the vertical joints of the adjacent blocks of the upper and lower layers of the cross-shaped block units are staggered, namely the first block of the upper layer of block rows faces the second block of the lower layer of block rows; respectively embedding and connecting the bar planting blocks, the first block body and the second block body into a line of block rows with the head and the tail being the bar planting blocks and the middle being the first block body and the second block body which are arranged in a staggered mode in a way that tenons and grooves of adjacent surfaces are embedded, completing the bar planting of the head part of the bar planting block row of the second row of block rows and the whole bar planting of the bar planting block at the tail part, and completing the whole bar planting of the corresponding surface of the connecting block corresponding to the bar planting block at the head part; then welding all the embedded bars of the embedded bar blocks at the head part and all the embedded bars of the corresponding connecting blocks, and welding all the embedded bars of the embedded bar blocks at the tail part and all the embedded bars of the inner lining plate of the underground continuous wall one by one to complete the installation and construction of the second row of block bodies; by parity of reasoning, the splicing construction of the v-shaped block units of the second layer taking the upright column sections as the center is completed; repeating the process of the step 4), and fixedly connecting the blocks of the cross-shaped block units of the second layer by taking the upright column sections as the center;

6) the cross block unit of the first layer and the cross block unit of the second layer are fixedly connected from top to bottom: respectively penetrating arc-shaped screws through vertically adjacent vertical arc-shaped through holes of adjacent blocks of the upper and lower layers of cross-shaped block units, respectively screwing nuts for fastening, and fixedly connecting the upper and lower layers of cross-shaped block units of the first layer and the second layer one by one;

7) primarily completing the assembly construction of the underground continuous wall at the inner lower part of the foundation pit, repeating the steps 1) to 6) at the outer sides of the four ends of the upper and lower layers of fixedly connected cross block units, sequentially completing the construction of a second cross block unit, a third cross block unit … … until all cross block units connected into a grid shape at the inner lower part of the foundation pit are built, and cumulatively building a plurality of layers of cross block units to form a grid-shaped mid-partition wall body unit with the height of 2.5-3 m; then two side edges of a plurality of vertically arranged supporting templates are fixedly connected with the edge of one end of a bar planting block of a bottom grid-shaped intermediate wall unit through a pair-penetrating screw rod and a nut respectively, so that four bar planting blocks adjacent to the stand column are fixedly connected into an octagonal prefabricated well, four intermediate wall bodies taking the stand column as a center are fixedly connected into a cross-shaped intermediate wall unit at the bottom layer in the foundation pit through a plurality of corresponding vertically arranged supporting templates respectively, a plurality of vertically arranged plane templates are arranged between two sides of the bar planting block at the outer end of the intermediate wall unit and an adjacent underground continuous wall inner lining plate respectively, one end edge of each plane template and one end edge of the corresponding bar planting block are fixedly connected through a pair-penetrating screw rod and nut group respectively, and the edge of the other end of each plane template is fixed on the underground continuous wall inner lining plate at a corresponding position, so that a rectangular prefabricated well is formed;

8) and (3) completing grouting and concrete pouring of the grid-shaped intermediate wall units of each layer: injecting cement slurry downwards from the hollow sleeves of the connecting blocks at the tops of the first layer of upright post sections, wherein the cement slurry fills gaps among the connecting blocks of the first layer of upright post sections; simultaneously, respectively grouting from vertical grouting holes of each first block, each second block and each bar planting block on the top layer of the grid-shaped mid-partition wall unit at the bottom; cement grout flows into the horizontal grout connecting holes from the vertical grouting holes of the corresponding blocks, and grouting of the cement grout of all the blocks of the wall units of the cross-shaped intermediate walls at the bottom layer is sequentially completed; filling each octagonal prefabricated well and each rectangular prefabricated well in the grid-shaped intermediate wall unit at the bottom with concrete to complete the construction of the grid-shaped intermediate wall unit at the bottom in the foundation pit;

9) the construction of each layer of grid-shaped mid-partition wall units in the foundation pit is finished layer by layer: repeating the processes from the step 1) to the step 8), and finishing the construction of the grid-shaped mid-partition wall units in the foundation pit layer by layer; filling concrete or sand or water in each grid of the partition wall unit according to design requirements, adopting grid-divided core filling on site in order to improve the construction progress, dividing operation surfaces according to actual operation teams and groups on site, allowing cross construction at different grids on the same layer, and simultaneously performing splicing operation at a second position and formwork-supporting pouring operation at a third position if core filling operation is performed on the operation surface at the first position.

Technical Field

The invention belongs to the technical field of bridge construction, and particularly relates to a foundation structure of an underground continuous wall of a suspension bridge anchorage, and a construction method.

Background

The suspension bridge is a main form of a large-span bridge, is widely applied to highway and railway engineering at present, and comprises a suspension cable, a cable tower, an anchorage, a suspender, a bridge deck system and the like. The anchorage is used as the end of a fixed main cable and is divided into a gravity anchor and a tunnel anchor. The gravity anchor has the advantages of safe and reliable structure, strong applicability and wide application.

The foundation form of the gravity anchor mainly comprises the forms of a sunk well foundation, an underground continuous wall foundation and the like according to different geological conditions. The general process of the underground continuous wall foundation construction comprises the following steps: excavation of a foundation pit → construction of a foundation slab → construction of an intermediate wall → core filling. The intermediate wall is used as a non-bearing component and mainly used for dividing eccentric gravity moment and saving the consumption of concrete. The existing construction method of the underground continuous wall comprises the steps of binding steel bars on site according to a design drawing, erecting a formwork and pouring frame concrete, demolding and maintaining and the like. The problems that exist mainly include: (1) a large amount of manpower and material resources are consumed in the non-main engineering part; (2) the strength, the workability and the like of the cast-in-place concrete are not as good as those of the prefabrication in a workshop; (3) a large amount of time is needed for on-site maintenance waiting, the construction period is limited to a certain extent, the maintenance condition is poor, and the concrete quality defect is obvious; (4) the existing framework concrete template mainly comprises a creeping formwork, a sliding formwork and a turnover formwork, wherein the creeping formwork is high in manufacturing cost, the maintenance cost and the repair cost in the using process are high, the standardization requirement of a formwork accessory is high, and the requirement on the mechanical property of a jacking system is high. The sliding time of the sliding die is difficult to control. The template of the turnover mould is troublesome to dismantle and is easy to cause safety accidents. The construction cost of the underground diaphragm wall foundation is greatly increased, and the construction period is prolonged.

Disclosure of Invention

The invention aims to provide an anchorage underground diaphragm wall foundation assembled type mid-board and a construction method, which improve the construction quality, shorten the construction period and reduce the construction cost.

The invention is realized by the following technical scheme:

an assembly type intermediate wall of an anchorage underground diaphragm wall foundation comprises a plurality of first block bodies, second block bodies, bar planting blocks and connecting blocks which are prefabricated by reinforced concrete, wherein the width and the height of the first block bodies, the width and the height of the second block bodies, the bar planting blocks and the connecting blocks are the same, the length of the first block bodies is larger than that of the second block bodies, and the first block bodies and the second block bodies are connected in a foundation pit in a staggered mode; adjacent surfaces of the first block body and the second block body, and adjacent surfaces of the first block body and the rib planting block or adjacent surfaces of the second block body and the rib planting block are respectively embedded with each other through the embedding mechanism and the fixed connecting mechanism and then fixedly connected into a row of block rows, and the plurality of rows of block rows are overlapped into an intermediate wall body with the required height through the fixed connecting mechanism in an up-down staggered manner; the bar planting blocks are respectively fixed on two ends of the wall body of the middle partition wall; the center of the upper side face of each connecting block is provided with a hollow sleeve extending upwards and vertically, the center of the lower side face of each connecting block is provided with a connecting block counter bore which is inward and vertically, and the connecting block counter bores of the connecting blocks and the hollow sleeves are embedded vertically and sequentially to form an upright post; taking the upright post as a center, and welding and fixedly connecting a plurality of embedded bars on the periphery of a connecting block of the upright post with a plurality of embedded bars on the end surface of an embedded bar block at the head part of the corresponding intermediate wall one by one; two side edges of a plurality of supporting templates which are arranged up and down are respectively and fixedly connected with the edge of one end of the bar planting block of the corresponding middle partition wall body through a pair of penetrating screw rods and nuts, so that four bar planting blocks adjacent to the upright post and four rows of supporting templates are fixedly connected into an octagonal prefabricated well taking the upright post as the center; the four intermediate wall bodies taking the stand columns as the centers are fixedly connected into a cross intermediate wall body unit through a plurality of vertically arranged supporting templates, and the ends of a plurality of adjacent cross intermediate wall body units in the foundation pit are connected with each other into an intermediate wall with a plurality of grids; many plant bars of the plant bar piece of mid-board outer end weld one by one with many plant bars on the underground continuous wall inner liner board on foundation ditch limit and link firmly, set up the polylith plane template of vertical arrangement between the plant bar piece both sides of mid-board outer end and the adjacent underground continuous wall inner liner board respectively, plane template one end edge and the plant bar piece one end edge that corresponds are respectively through to wearing screw nut group fixed connection, and plane template other end edge is fixed on the underground continuous wall inner liner board that corresponds the position.

The object of the invention is further achieved by the following technical measures.

Furthermore, the longitudinal direction of the first block body, the longitudinal direction of the second block body and the longitudinal direction of the rib planting block are respectively provided with a horizontal slurry connecting hole which runs through the centers of the two ends, the vertical direction of the first block body, the vertical direction of the second block body and the vertical direction of the rib planting block are respectively provided with reserved vertical grouting holes which are arranged side by side and run through the upper side and the lower side, and the reserved vertical grouting holes are respectively communicated with the corresponding horizontal slurry connecting holes.

Furthermore, the scarf joint mechanism comprises tenons arranged at one end of the first block body and one end of the second block body respectively, and grooves which are arranged at the other end of the first block body and the other end of the second block body respectively and matched with the tenons; one end of the bar planting block is a tenon or a groove, and the other end of the bar planting block is a plane for mounting a plurality of bar planting blocks; the first block body and the second block body are spliced in a staggered mode, and the joint of the first block body and the second block body is connected in a jogged mode through a tenon and a groove; the bar planting blocks at two ends of the block row are connected with one end of the first block or the second block respectively through the jogging of the corresponding tenon grooves to form the block row, and a plurality of bar planting blocks are fixed at the other end of each bar planting block respectively.

Furthermore, the fixed connection mechanism comprises a plurality of groups of arc-shaped screws and nuts, a group of horizontal combination holes and a group of vertical combination holes are respectively arranged at four corners of two longitudinal sides of the first block, four corners of two longitudinal sides of the second block and four corners of two longitudinal sides of the bar-planting block, and a group of vertical combination holes are respectively arranged at four corners of vertical sides of the connecting block; the horizontal combined hole comprises a triangular counter bore and a horizontal arc-shaped through hole, and after the two first block bodies and the second block bodies which are adjacent left and right are spliced, the horizontal arc-shaped through holes are communicated with each other; the vertical direction combination hole comprises a triangular counter bore and a vertical arc-shaped through hole, and after the first block body and the second block body which are adjacent up and down are spliced together, or after two connecting blocks which are adjacent up and down are spliced together, the vertical arc-shaped through holes which are adjacent to each other are communicated; the arc-shaped screws respectively horizontally penetrate through horizontal arc-shaped through holes which respectively correspond to the four corners of the two longitudinal side surfaces of the first block and the four corners of the two longitudinal side surfaces of the adjacent second block, or the four corners of the two longitudinal side surfaces of the first block and the four corners of the two longitudinal side surfaces of the adjacent bar-planting block, or the four corners of the two longitudinal side surfaces of the second block and the four corners of the two longitudinal side surfaces of the adjacent bar-planting block, and are respectively fastened through nuts; therefore, the first block bodies and the second block bodies which are arranged in a staggered mode and the bar planting blocks at the two ends are fixedly connected and spliced into block rows, or vertically overlapped connecting blocks are fixedly connected into stand columns, or vertically staggered multi-row block rows are fixedly connected into an intermediate wall body with the required height. The horizontal arc-shaped through hole or the vertical arc-shaped through hole is a stepped hole, a small end hole of the stepped hole is communicated with the corresponding triangular counter bore, and a large end hole of the stepped hole is communicated with the vertical end face of the first block, the vertical end face of the second block and the vertical end face of the bar-planting block; the big end hole of the stepped hole is also communicated with the horizontal side surface of the first block, the horizontal side surface of the second block, the horizontal side surface of the bar planting block and the horizontal side surface of the connecting block respectively.

Furthermore, the horizontal arc-shaped through hole and the vertical arc-shaped through hole are stepped holes, small end holes of the stepped holes are respectively communicated with the corresponding triangular counter bores, and large end holes of the stepped holes are respectively communicated with the vertical end face of the first block, the vertical end face of the second block and the vertical end face of the bar-planting block; the big end hole of the stepped hole is also communicated with the horizontal side surface of the first block, the horizontal side surface of the second block, the horizontal side surface of the bar planting block and the horizontal side surface of the connecting block respectively.

Further, the height of the middle partition wall unit in one layer is 2.5 m-3 m.

A construction method of an assembly type intermediate wall of an anchorage underground diaphragm wall foundation comprises the following steps:

1) manufacturing a reinforced concrete prefabricated block and transporting to a construction site: determining the length, width and height of the first block body, the second block body, the bar planting block and the connecting block according to the actual size of the foundation pit, completing the batch prefabrication of the required first block body, second block body, bar planting block and connecting block in a concrete prefabrication plant, and transporting the prefabricated first block body, second block body, bar planting block and connecting block to a construction site for temporary stacking; according to the design structure of the underground continuous wall, a square grid groove is reserved when a foundation pit bottom plate is poured, and the depth of the groove is one third of the height of the first block body;

2) and (3) constructing the column sections: firstly, a first connecting block is hoisted and positioned at the intersection of the square grid grooves, and then the building connecting blocks are assembled block by block on the first connecting block to form upright column sections with the height of 2.5-3.0 m by a positioning connection mode that a connecting block counter bore at the center of the lower side of a second connecting block is sleeved on a hollow sleeve at the upper side of the first connecting block; respectively aligning four side surfaces of the upright column sections, so that the adjacent vertical arc-shaped through holes of the two vertically superposed connecting blocks are communicated; then, respectively threading the arc-shaped screw rods through two adjacent vertical arc-shaped through holes, and then respectively screwing nuts for fastening to complete the fixed connection of each connecting block of the upright column section;

3) and (3) construction of block rows: according to the design position of the partition wall body, the bar planting blocks at the head part of the block row are respectively positioned in the corresponding grooves, so that the bar planting planes on one side of the bar planting blocks at the head part are respectively opposite to the planes of the connecting blocks of the adjacent upright post sections, and then the bar planting blocks, the first block body and the second block body are embedded and connected into a row of block rows, the head and the tail of which are the bar planting blocks, and the middle of which is the first block body and the second block body which are arranged in a staggered mode, in an embedded mode through the tenons and the grooves of the adjacent surfaces; then, respectively completing all bar planting of the bar planting blocks at the head part and the tail part of the block line, and completing all bar planting of the corresponding surface of the connecting block corresponding to the bar planting blocks at the head part, then welding all the bar planting of the bar planting blocks at the head part and all the bar planting of the corresponding end surface of the connecting block one by one, and welding all the bar planting of the bar planting blocks at the tail part and all the bar planting of the corresponding inner lining plate of the underground continuous wall one by one, thereby completing the splicing construction of the first line of block lines; repeating the process, and completing splicing construction of the other three rows of block bodies connected with the end faces of the connecting blocks at the bottoms of the upright column sections one by one;

4) and (3) finishing the fixed connection between the adjacent blocks in four block rows: firstly, respectively penetrating an arc-shaped screw through left and right adjacent horizontal arc-shaped through holes of each adjacent block in each block row, then respectively screwing a nut to fasten, and fixedly connecting adjacent blocks in the block rows in one row one by one to form a first layer of cross-shaped block units taking the upright column segment as the center;

5) constructing a second layer of cross block units on the cross block units of the first layer in a staggered manner; the vertical joints of the adjacent blocks of the upper and lower layers of the cross-shaped block units are staggered, namely the first block of the upper layer of block rows faces the second block of the lower layer of block rows; respectively embedding and connecting the bar planting blocks, the first block body and the second block body into a line of block rows with the head and the tail being the bar planting blocks and the middle being the first block body and the second block body which are arranged in a staggered mode in a way that tenons and grooves of adjacent surfaces are embedded, completing the bar planting of the head part of the bar planting block row of the second row of block rows and the whole bar planting of the bar planting block at the tail part, and completing the whole bar planting of the corresponding surface of the connecting block corresponding to the bar planting block at the head part; then welding all the embedded bars of the embedded bar blocks at the head part and all the embedded bars of the corresponding connecting blocks, and welding all the embedded bars of the embedded bar blocks at the tail part and all the embedded bars of the inner lining plate of the underground continuous wall one by one to complete the installation and construction of the second row of block bodies; by parity of reasoning, the splicing construction of the cross block units of the second layer taking the upright column sections as the center is completed; repeating the process of the step 4), and fixedly connecting the blocks of the cross-shaped block units of the second layer by taking the upright column sections as the center;

6) the cross block unit of the first layer and the cross block unit of the second layer are fixedly connected from top to bottom: respectively penetrating arc-shaped screws through vertically adjacent vertical arc-shaped through holes of adjacent blocks of the upper and lower layers of cross-shaped block units, respectively screwing nuts for fastening, and fixedly connecting the upper and lower layers of cross-shaped block units of the first layer and the second layer one by one;

7) primarily completing the assembly construction of the underground continuous wall at the inner lower part of the foundation pit, repeating the steps 1) to 6) at the outer sides of the four ends of the upper and lower layers of fixedly connected cross block units, sequentially completing the construction of a second cross block unit, a third cross block unit … … until all cross block units connected into a grid shape at the inner lower part of the foundation pit are built, and cumulatively building a plurality of layers of cross block units to form a grid-shaped mid-partition wall body unit with the height of 2.5-3 m; then, two side edges of a plurality of vertically arranged supporting templates are fixedly connected with the edge of one end of a bar planting block of a grid-shaped intermediate wall unit at the bottom respectively through a through screw and nut group, so that four bar planting blocks adjacent to the upright post are fixedly connected into an octagonal prefabricated well, four intermediate wall bodies taking the upright post section as the center are fixedly connected into a cross-shaped intermediate wall unit at the bottom layer in the foundation pit respectively through a plurality of corresponding vertically arranged supporting templates, a plurality of vertically arranged plane templates are respectively arranged between two sides of the bar planting block at the outer end of the intermediate wall unit and an adjacent underground continuous wall inner lining plate, one end edge of each plane template and one end edge of the corresponding bar planting block are fixedly connected through a through screw and a nut respectively, and the other end edge of each plane template is fixed on the underground continuous wall inner lining plate at the corresponding position, so that a rectangular prefabricated well in a shape is formed;

8) and (3) completing grouting and concrete pouring of the grid-shaped intermediate wall units of each layer: injecting cement slurry downwards from the hollow sleeves of the connecting blocks at the tops of the first layer of upright post sections, wherein the cement slurry fills gaps among the connecting blocks of the first layer of upright post sections; simultaneously, respectively grouting from vertical grouting holes of each first block, each second block and each rib planting block on the top layer of the latticed intermediate wall unit at the bottom; cement grout flows into the horizontal grout connecting holes from the vertical grouting holes of the corresponding blocks, and grouting of the cement grout of all the blocks of the wall units of the cross-shaped intermediate walls at the bottom layer is sequentially completed; filling each octagonal prefabricated well and each rectangular prefabricated well in the grid-shaped intermediate wall unit at the bottom with concrete to complete the construction of the grid-shaped intermediate wall unit at the bottom in the foundation pit;

9) the construction of each layer of grid-shaped mid-partition wall units in the foundation pit is finished layer by layer: repeating the processes from the step 1) to the step 8), and finishing the construction of the grid-shaped mid-partition wall units in the foundation pit layer by layer; filling concrete or sand or water in each grid of the partition wall unit according to design requirements, adopting grid-divided core filling on site in order to improve the construction progress, dividing operation surfaces according to actual operation teams and groups on site, allowing cross construction at different grids on the same layer, and simultaneously performing splicing operation at a second position and formwork-supporting pouring operation at a third position if core filling operation is performed on the operation surface at the first position.

The reinforced concrete prefabricated block is built through the scarf joint mechanism and the fixed connection mechanism to form the layered grid-shaped intermediate wall units, and then the layered grid-shaped intermediate wall units are built layer by layer to form the intermediate wall.

Advantages and features of the present invention will be illustrated and explained by the following non-restrictive description of preferred embodiments thereof, given by way of example only with reference to the accompanying drawings.

Drawings

FIG. 1 is a floor plan of the structure of the present invention;

FIG. 2 is a perspective view of a cruciform block element of the present invention;

FIG. 3 is a perspective view of the connection of upper and lower blocks;

FIG. 4 is an enlarged sectional view A-A of FIG. 1;

FIG. 5 is an enlarged sectional view B-B of FIG. 3;

FIG. 6 is an enlarged cross-sectional view of C-C of FIG. 3;

fig. 7 is an enlarged sectional view of fig. 3D-D.

Detailed Description

The invention is further illustrated by the following figures and examples.

In the description of the present invention, terms indicating orientation or position such as "upper", "lower", "left", "right", "inner", "outer", etc., are based on the orientation shown in the drawings only for the purpose of simplifying the description, and do not indicate or imply that the present invention must have a specific orientation or position.

The embodiment shown in fig. 1 is fixed in a rectangular foundation pit, and the invention can also be fixed in a circular or other foundation pit. As shown in fig. 1 to 3, the present embodiment includes a plurality of first block bodies 1, second block bodies 2, bar-planting blocks 3 and connecting blocks 4 prefabricated from reinforced concrete, the widths and heights of the first block bodies 1, the second block bodies 2, the bar-planting blocks 3 and the connecting blocks 4 are the same, the length of the first block body 1 is greater than that of the second block body 2, and the first block bodies 1 and the second block bodies 2 are connected in the foundation pit 100 in a staggered manner. The adjacent surfaces of the first block body 1 and the second block body 2, and the adjacent surfaces of the first block body 1 and the bar-planting block 3 or the adjacent surfaces of the second block body 2 and the bar-planting block 3 are respectively embedded with each other through the embedding mechanism 5 and the fixed connecting mechanism 6 and then fixedly connected into a row of block rows 110, and the plurality of rows of block rows 110 are vertically and staggeredly overlapped into the intermediate wall body 120 with the required height through the fixed connecting mechanism 6. The bar planting blocks 3 are respectively fixed on both ends of the intermediate wall body 120.

As shown in fig. 1, 2 and 4, a hollow sleeve 41 extending upwards and vertically is disposed at the center of the upper side of the connecting block 4, a counter bore 42 facing inwards is disposed at the center of the lower side of the connecting block 4, and the counter bores 42 of the connecting blocks of the connecting block 4 and the hollow sleeve 41 are embedded vertically and sequentially to form the upright post 40. With the upright post 40 as the center, a plurality of the embedded bars 7 around the connecting block 4 of the upright post 40 are respectively welded and fixedly connected with a plurality of the embedded bars 7 on the end surface of the embedded bar block 3 at the head part of the corresponding intermediate wall body 120 one by one. Two side edges 81 of a plurality of supporting templates 8 arranged up and down are respectively fixedly connected with one end edge of the bar planting block 3 of the corresponding intermediate wall body 120 through a penetrating screw rod 91 and a nut 92, so that four bar planting blocks 3 adjacent to the upright post 40 and four supporting templates 8 are fixedly connected into an octagonal prefabricated well taking the upright post 40 as the center. Four intermediate wall bodies 120 centering on the columns 40 are fixedly connected to form a cross-shaped intermediate wall body unit 130 by a plurality of vertical support formworks 8, and ends of a plurality of adjacent cross-shaped intermediate wall body units 130 in the foundation pit 100 are connected to each other to form an intermediate wall having a plurality of grids 140.

Many planting bars 7 of the planting bar piece 3 of intermediate wall outer end and many planting bars 7 on the underground continuous wall interior lining board 102 of foundation ditch limit 101 weld one by one and link firmly, set up vertically arranged polylith plane template 82 between 3 both sides of the planting bar piece of intermediate wall outer end and the adjacent underground continuous wall interior lining board 102 respectively, plane template 82 one end edge and the 3 one end edges of the planting bar piece that corresponds are respectively through wearing screw and nut group 9 fixed connection, plane template 82 other end edge is fixed on the underground continuous wall interior lining board 102 that corresponds the position.

As shown in fig. 7, horizontal grout connecting holes 11 penetrating through centers of two ends are respectively arranged in the longitudinal direction of the first block 1, the longitudinal direction of the second block 2 and the longitudinal direction of the bar-planting block 3, reserved vertical grouting holes 12 which are arranged side by side and have through upper and lower side surfaces are respectively arranged in the vertical direction of the first block 1, the vertical direction of the second block 2 and the vertical direction of the bar-planting block 3, the reserved vertical grouting holes 12 are respectively communicated with the corresponding horizontal grout connecting holes 11, so that poured grout can flow up and down, left and right, and vertically pour and fixedly connect a plurality of rows of block rows 110 into a whole.

As shown in fig. 3 and 7, the engagement mechanism 5 includes a tenon 51 provided at one end of the first block 1 and one end of the second block 2, respectively, and a groove 52 provided at the other end of the first block 1 and the other end of the second block 2 to be fitted with the tenon, respectively. One end of the bar planting block 3 is a tenon 51 or a groove 52, and the other end of the bar planting block 3 is a plane for installing a plurality of bar planting blocks 7. The first block body 1 and the second block body 2 are spliced in a staggered mode, and the joint of the first block body and the second block body is connected in a jogged mode through a tenon 51 and a groove 52. The embedded bar blocks 3 at the two ends of the block row 110 are respectively embedded and spliced into a block row through the corresponding tenon 51 and groove 52 at one end connected with the first block 1 or the second block 2, and a plurality of embedded bars 7 are respectively fixed at the other end of the embedded bar block 3.

As shown in fig. 3, 5 and 6, the fixed connection mechanism 6 includes a plurality of sets of arc-shaped screws 61 and nuts 62, a set of horizontal combination holes 63 and a set of vertical combination holes 64 are respectively formed at four corners of two longitudinal sides of the first block 1, four corners of two longitudinal sides of the second block 2 and four corners of two longitudinal sides of the bar-planting block 3, and a set of vertical combination holes 64 is respectively formed at four corners of a vertical side of the connection block 4. The horizontal combination hole 63 includes a triangular counter bore 631 and a horizontal arc-shaped through hole 632, and after the two left and right adjacent first block bodies 1 and second block bodies 2 are combined, the horizontal arc-shaped through holes 632 of the two adjacent first block bodies are communicated with each other. The vertical combination hole 64 includes a triangular counter bore 631 and a vertical arc through hole 641, and after the first block 1 and the second block 2 adjacent to each other up and down are spliced together, or after the two connecting blocks 4 adjacent to each other up and down are spliced together, the vertical arc through holes 641 adjacent to each other are communicated with each other. The arc-shaped screws 61 horizontally penetrate through the horizontal arc-shaped through holes 632 respectively corresponding to the four corners of the two longitudinal sides of the first block 1 and the four corners of the two longitudinal sides of the adjacent second block 2, or the four corners of the two longitudinal sides of the first block and the four corners of the two longitudinal sides of the adjacent bar-planting block 3, or the four corners of the two longitudinal sides of the second block 2 and the four corners of the two longitudinal sides of the adjacent bar-planting block 3, and are respectively fastened by the nuts 62. Therefore, the first block bodies 1 and the second block bodies 2 which are arranged in a staggered mode and the bar planting blocks 3 at two ends are fixedly connected and spliced into the block body rows 110, or the vertically overlapped connecting blocks 4 are fixedly connected into the upright columns 40, or the vertically staggered multi-row block body rows 110 are fixedly connected into the intermediate wall body with the required height.

Horizontal arc through-hole 632 and perpendicular arc through-hole 641 are the shoulder hole, and the tip hole of shoulder hole communicates with each other with the triangle-shaped counter bore 631 that corresponds respectively, and the main aspects hole 6321 of shoulder hole communicates with each other with the perpendicular terminal surface of first block 1, the perpendicular terminal surface of second block 2 and the perpendicular terminal surface of bar planting piece 3 respectively. The big end hole 6321 of the stepped hole is also communicated with the horizontal side surface of the first block 1, the horizontal side surface of the second block 2, the horizontal side surface of the bar-planting block 3 and the horizontal side surface of the connecting block 4, so that the arc-shaped screw 61 can penetrate through two adjacent blocks conveniently.

The construction of the partition wall is carried out in layers, and the height of the partition wall unit in each layer is 2.5-3 m, so that the building is convenient.

The construction method comprises the following steps:

1) manufacturing a reinforced concrete prefabricated block and transporting to a construction site: the length, the width and the height of the first block body 1, the second block body 2, the steel bar planting block 3 and the connecting block 4 are determined according to the actual size of the foundation pit 100, and the required batch prefabrication of the first block body 1, the second block body 2, the steel bar planting block 3 and the connecting block 4 is completed in a concrete prefabrication plant and is transported to a construction site for temporary stacking. According to the design structure of the underground continuous wall, a square grid groove is reserved when the foundation pit bottom plate 101 is poured, and the depth of the groove is one third of the height of the first block body 1.

2) Construction of the column sections 40: firstly, the first connecting block 4 is hoisted and positioned at the intersection of the square grid grooves, and then on the first connecting block 4, the building connecting blocks 4 are assembled block by block to form the upright column subsection 40 with the height of 2.5 m-3.0 m by the positioning connection mode that the connecting block counter bore 42 at the center of the lower side of the second connecting block 4 is sleeved on the hollow sleeve 41 at the upper side of the first connecting block 1. And the four side surfaces of the upright column section 40 are respectively aligned, so that the adjacent vertical arc-shaped through holes 641 of the two connecting blocks 4 which are overlapped up and down are communicated. Then, the arc screws 61 are respectively passed through two adjacent vertical arc through holes 641, and then the nuts 62 are respectively screwed and fastened, thereby completing the fixed connection of each connecting block 4 of the column segment 40.

3) Construction of block rows 110: according to the design position of the intermediate wall body, the bar planting blocks 3 of the block row 110 head part are respectively positioned in the corresponding grooves, so that the bar planting planes on one side of the bar planting blocks 3 of the head part are respectively opposite to the planes of the connecting blocks 4 of the adjacent upright column sections 40, and then the bar planting blocks 3, the first block bodies 2 and the second block bodies 1 are connected into a row of block rows 110, wherein the head and the tail of each row are the bar planting blocks 3, and the middle of each row is the first block bodies 1 and the second block bodies 2 which are arranged in a staggered mode in an embedded mode through the tenons 51 and the grooves 52 of the adjacent surfaces. And then respectively finishing the bar planting blocks 3 at the head part and 3 at the tail part of the block line 110, finishing all the bar planting on the corresponding surface of the connecting block 4 corresponding to the bar planting blocks 3 at the head part, welding all the bar planting blocks of the bar planting blocks 3 at the head part and all the bar planting blocks on the corresponding end surfaces of the connecting block 4 one by one, welding all the bar planting blocks of the bar planting blocks 3 at the tail part and all the bar planting blocks of the corresponding underground continuous wall lining plate 102 one by one, and finishing the splicing construction of the first line block line 110. And repeating the process to finish the splicing construction of the other three rows of block bodies 110 connected with the end surfaces of the connecting blocks 4 at the bottoms of the upright column sections 40 one by one.

4) And (3) completing the fixed connection between the adjacent blocks in four block rows 110: the arc screw 61 penetrates through the left and right adjacent horizontal arc through holes 632 of each adjacent block in each block row, and then the nuts 62 are screwed up to fasten, so that the fixed connection between the adjacent blocks in the block row 110 is completed one by one, and the first layer of cross block unit 120 taking the upright column segment 40 as the center is formed.

5) Building a second layer of cross block units 120 on the first layer of cross block units 120 in a staggered manner; the vertical joints of the adjacent blocks of the two upper and lower layers of cross-shaped block units 120 are staggered, that is, the first block 1 of the block row 110 of the upper layer is opposite to the second block 2 of the block row 110 of the lower layer. The bar planting block 3, the first block body 1 and the second block body 2 are respectively connected into a line of block lines 110 with the head and the tail being the bar planting blocks 3 and the middle being the first block body 1 and the second block body 2 which are arranged in a staggered mode through the jogged mode of the tenon 51 and the groove 52 of the adjacent surfaces, the bar planting blocks 3 at the head part of the second line of block lines 110 and all the bar planting blocks 3 at the tail part are planted, and all the bar planting of the corresponding surface of the connecting block 4 corresponding to the bar planting blocks 3 at the head part are completed. Then all the embedded bars of the embedded bar blocks 3 at the head part and all the embedded bars of the corresponding connecting blocks 4, all the embedded bars of the embedded bar blocks 3 at the tail part and all the embedded bars of the inner lining plate 102 of the underground continuous wall are welded one by one, and the installation and construction of the block body row 110 of the second row are completed. And by analogy, the splicing construction of the cross-shaped block units 120 of the second layer taking the upright column sections 40 as the center is completed. Repeating the process of the step 4), and fixedly connecting the blocks of the cross-shaped block units of the second layer by taking the upright column sections 40 as centers.

6) The upper and lower fixed connection of the cross block unit 120 of the first layer and the cross block unit 120 of the second layer: the arc screw 61 respectively passes through the vertical arc through holes 641 which are adjacent to each block of the upper and lower layers of cross block units 120, and the nuts 62 are screwed up respectively for fastening, so that the upper and lower fixed connection of the first layer of cross block units 120 and the second layer of cross block units is completed one by one.

7) The construction of assembling the underground diaphragm wall of lower part in the foundation pit 100 is primarily accomplished, the process of step 1) -step 6) is repeated in the four sides outside of upper and lower two-layer fixed connection's cross block unit, accomplish second cross block unit 120 in proper order, the construction of all cross block units 120 that connect into the grid shape of lower part in third cross block unit 120 … … until foundation pit 100, multilayer cross block unit 120 accumulates to step up into the grid shape mid-wall body unit 130 that highly is 2.5 ~ 3m bottom. Then, two side edges 81 of a plurality of vertically arranged supporting templates 8 are respectively and fixedly connected with one end edge of the bar-planting block 3 of the bottom grid-shaped intermediate wall unit 130 through a through screw nut group 9, so that four bar-planting blocks 3 adjacent to the upright posts are fixedly connected into an octagonal prefabricated well, four intermediate wall bodies taking the upright post segment 40 as the center are respectively and fixedly connected into a cross-shaped intermediate wall unit 130 of the bottom layer of the foundation pit 100 through a plurality of corresponding vertically arranged supporting templates 8, a plurality of vertically arranged plane templates 82 are respectively arranged between two sides of the bar-planting block 3 at the outer end of the intermediate wall unit 130 and the adjacent underground continuous wall inner lining plate 102, one end edge of each plane template 82 and one end edge of the corresponding bar-planting block 3 are respectively and fixedly connected through a through screw nut group 9, the other end edge of each plane template 82 is fixed on the underground continuous wall inner lining plate 102 at the corresponding position, a cuboid-shaped prefabricated well is formed.

8) And (3) completing grouting and concrete pouring of the grid-shaped intermediate wall units of each layer: grout is poured 41 from the hollow casing of the connector blocks 4 at the top of the column sections 40 of the first course, filling the spaces between the connector blocks 4 of the column sections 40 of the first course. And simultaneously, grouting is respectively carried out from the vertical grouting holes 12 of the first blocks 1, the second blocks 2 and the bar planting blocks 3 on the top layer of the bottom grid-shaped intermediate wall unit 130. Cement grout flows into the horizontal grout connecting holes 11 from the vertical grout holes of the corresponding blocks, and grouting of the cement grout of all the blocks of the bottom-layer cross-shaped intermediate wall units 130 is sequentially completed. And filling the octagonal prefabricated wells and the rectangular prefabricated wells in the bottom grid-shaped intermediate wall unit 130 with concrete to complete the construction of the bottom grid-shaped intermediate wall unit 130 in the foundation pit 100.

9) And (3) finishing the construction of the partition wall units 130 in each layer of grid in the foundation pit layer by layer: repeating the processes from the step 1) to the step 8), and finishing the construction of the grid-shaped mid-partition wall units 130 in each layer in the foundation pit 100 layer by layer; filling concrete or sand or water in each grid 140 of the intermediate wall unit 130 according to design requirements, adopting grid core filling on site in order to improve the construction progress, dividing operation surfaces according to actual operation groups on site, allowing cross construction at different grids on the same layer, and simultaneously performing splicing operation at a second position and formwork-supporting pouring operation at a third position if core filling operation is performed on the operation surface at the first position.

In addition to the above embodiments, the present invention may have other embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the claims of the present invention.