阅读说明：本技术 一种装配式预应力挡土墙 (Assembled prestressing force retaining wall ) 是由 张延年 张于于 海洪 康楠 王铁源 闫明程 于洋 李志军 陈志燕 杜松岩 董宁 于 2020-05-28 设计创作，主要内容包括：一种装配式预应力挡土墙,属于岩土工程技术领域。所述装配式预应力挡土墙包括墙体模块、扶壁柱和挡土墙基板,两个所述扶壁柱之间设置有一个挡土墙单元,每个所述挡土墙单元由多层墙体模块组成,且扶壁柱位于两个挡土墙单元的对接位置处和挡土墙单元的两端,每个所述墙体模块的中心位置处设置有方形空腔。本发明提供的装配式预应力挡土墙采用工厂化标准预制、现场安装施工的方式,具有装配工期较短、预制件质量较高的优点,降低了人工成本和模板成本。(An assembled prestressed retaining wall belongs to the technical field of geotechnical engineering. Assembled prestressing force retaining wall includes wall body module, buttress post and retaining wall base plate, two be provided with a retaining wall unit between the buttress post, every the retaining wall unit comprises multilayer wall body module, and the buttress post is located the butt joint position department of two retaining wall units and the both ends of retaining wall unit, every the central point department of putting of wall body module is provided with square cavity. The assembled prestressed retaining wall provided by the invention adopts a factory standard prefabrication and field installation construction mode, has the advantages of short assembly period and high quality of prefabricated parts, and reduces labor cost and template cost.)

1. The utility model provides an assembled prestressing force retaining wall which characterized in that: the assembled prestressed retaining wall comprises wall modules (1), retaining wall columns (2) and retaining wall substrates (3), wherein a retaining wall unit is arranged between the two retaining wall columns (2), each retaining wall unit consists of multiple layers of wall modules (1), the retaining wall columns (2) are positioned at the butt joint position of the two retaining wall units and at the two ends of the retaining wall unit, a square cavity (1-1) is arranged at the central position of each wall module (1), the inner wall of each square cavity (1-1) is fixedly connected with a plurality of retaining wall units (1-2), a first prestressed reinforcement channel (1-3) is arranged at the four corners of the upper surface of each wall module (1), right-angle notches (1-4) are arranged at two corners of the long edge of one side of each wall module (1), and four second prestressed reinforcement channels (2-1) are vertically arranged on the inner wall of each retaining wall column (2), the upper surface of the retaining wall base plate (3) is provided with a positioning groove (3-1), the positioning groove (3-1) is respectively and fixedly connected with a first prestressed reinforcement (3-2), a second prestressed reinforcement (3-3) and a third prestressed reinforcement (3-4), the bottoms of the first prestressed reinforcement (3-2), the second prestressed reinforcement (3-3) and the third prestressed reinforcement (3-4) are fixedly connected with anchor heads (3-5) of the prestressed reinforcements, and the anchor heads (3-5) of the prestressed reinforcement are positioned inside the retaining wall base plate (3), and tensioning end anchorage devices (4) are fixedly connected to the tops of the first prestressed reinforcement (3-2), the second prestressed reinforcement (3-3) and the third prestressed reinforcement (3-4).

2. Assembled prestressed retaining wall according to claim 1, characterized in that said wall modules (1) and buttress columns (2) are both prefabricated reinforced concrete elements.

3. Assembled prestressed retaining wall according to claim 1, characterized in that the retaining wall base (3) is a cast-in-place reinforced concrete element.

4. The assembled prestressed retaining wall of claim 1, wherein two retaining wall units are butt-jointed to form a groove by two right-angle notches (1-4), the buttress columns (2) are disposed at the groove, and the height of the wall module (1) is 300-500 mm.

5. Assembled prestressed retaining wall according to claim 1, characterized in that the sides of the square cavities (1-1) have a length of 180 and 240 mm.

6. Fabricated prestressed retaining wall according to claim 1, characterized in that the diameter of said first prestressed reinforcement channel (1-3) is 3-4 cm.

7. The assembled prestressed retaining wall according to claim 1, characterized in that the buttress columns (2) are in the shape of a cylinder with rectangular upper and lower surfaces, the width of the buttress columns (2) is equal to the width of a groove formed by splicing two right-angled notches (1-4) after the retaining wall units are butted, the length of the rectangular upper surface of the buttress column (2) is less than that of the rectangular lower surface, and the diameter of each second prestressed reinforcement channel (2-1) is 3-4 cm.

8. Assembled prestressed retaining wall according to claim 1, characterized in that said first prestressed reinforcement (3-2) extends through the square cavity (1-1), said second prestressed reinforcement (3-3) extends through the second prestressed reinforcement channel (2-1), connecting the buttress column (2) with the retaining wall baseplate (3), said third prestressed reinforcement (3-4) extends through the first prestressed reinforcement channel (1-3).

9. Assembled prestressed retaining wall according to claim 8, characterized in that the first (3-2), second (3-3) and third (3-4) prestressed reinforcement bars each have a height exceeding the foundation slab (3) of the wall by 16 cm.

Technical Field

The invention relates to the technical field of geotechnical engineering, in particular to an assembled prestressed retaining wall.

Background

The counterfort retaining wall is a light supporting and retaining structure, and the stability of the retaining wall is maintained by the dead weight of a wall body and the weight of a filled soil body (including load) above a wall bottom plate. The buttress retaining wall has a simple structure and a smaller wall section, can be suitable for areas lacking stones and having lower foundation bearing capacity, and is widely applied to municipal engineering and foundation pit supporting engineering. The traditional construction of the integral cast-in-situ counterfort retaining wall relates to the procedures of pouring, maintaining, template dismantling and the like of a vertical template and a concrete mortar, the construction period is long, the construction quality is not easy to control, and the damage to the surrounding environment is caused to a certain degree. The assembled buttress retaining walls are the trend of future development.

Disclosure of Invention

In order to solve the technical problems that the traditional integral cast-in-place counterfort retaining wall in the prior art has long construction period, is difficult to control the construction quality and causes certain damage to the surrounding environment, the invention provides the fabricated prestressed retaining wall which adopts the modes of factory standard prefabrication and field installation construction, has the advantages of short assembly period and high prefabricated part quality, reduces the labor cost and the template cost, and simultaneously, in the construction of the guidance projects of large and medium urban roads and bridges, if the construction of the road shoulder retaining wall is limited by surrounding buildings, the fabricated prestressed retaining wall needs to be adopted for construction, so that the construction of developers is convenient and fast, and the structure is simple.

The invention provides an assembled prestressed retaining wall, which comprises wall modules, retaining wall columns and a retaining wall base plate, wherein a retaining wall unit is arranged between the two retaining wall columns, each retaining wall unit consists of a plurality of layers of wall modules, the height of each retaining wall unit can be adjusted according to the actual engineering, the retaining wall units string the plurality of layers of wall modules (1) into one retaining wall unit through post-cast concrete and third prestressed steel bars (3-4) in square cavities (1-1), the retaining wall columns are positioned at the butt joint positions of the two retaining wall units and at the two ends of each retaining wall unit, a square cavity is arranged at the central position of each wall module, the inner wall of each square cavity is fixedly connected with a plurality of retaining wall units, and first prestressed steel bar channels are arranged at the four corners of the upper surface of each wall module, every two angles on one of them side long limit of wall body module are equipped with the right angle breach, every four second prestressed reinforcement passageways have vertically been seted up to the inner wall of buttress post, positioning groove has been seted up to the upper surface of retaining wall base plate, positioning groove is first prestressed reinforcement of fixedly connected with, second prestressed reinforcement and third prestressed reinforcement respectively, the equal fixedly connected with prestressed reinforcement's in bottom of first prestressed reinforcement, second prestressed reinforcement and third prestressed reinforcement anchor head, and prestressed reinforcement's anchor head is located inside the retaining wall base plate, the equal fixedly connected with of top of first prestressed reinforcement, second prestressed reinforcement and third prestressed reinforcement draws end ground tackle.

Preferably, the wall modules and the buttress columns are all prefabricated reinforced concrete members.

Preferably, the retaining wall substrate is a reinforced concrete member cast in place.

Preferably, the two retaining wall units are butted and spliced into a groove through the two right-angle notches, the retaining wall column cloth is arranged at the groove, the height of the wall module is 300-500mm, and the height of the retaining wall units can be adjusted to be integral multiple of the height of the wall module (1) according to the actual engineering.

Preferably, the side length of the square cavity is 180-240 mm.

Preferably, the diameter of the first prestressed reinforcement channel is 3-4 cm.

Preferably, the shape of the buttress column is a rectangular cylinder structure with the upper surface and the lower surface, the width of the buttress column is equal to the width of a groove formed by splicing two right-angle notches after the butting of the retaining wall units, the length of the rectangle on the upper surface of the buttress column is smaller than that of the rectangle on the lower surface of the buttress column, and the diameter of each second prestressed reinforcement channel is 3-4 cm.

Preferably, the first prestressed reinforcement penetrates through the square cavity, the second prestressed reinforcement penetrates through the second prestressed reinforcement channel, the buttress column is connected with the retaining wall base plate, and the third prestressed reinforcement penetrates through the first prestressed reinforcement channel.

Preferably, the heights of the first prestressed steel bar, the second prestressed steel bar and the third prestressed steel bar exceed 16cm of the earth wall substrate.

The construction steps of the assembled prestressed retaining wall are as follows:

step 1, leveling a site, performing construction preparation, and stacking all prefabricated components in the construction site for later use according to engineering requirements;

step 2, casting a retaining wall substrate in situ, reserving anchor heads of the prestressed reinforcements at the tops of the first prestressed reinforcement, the second prestressed reinforcement and the third prestressed reinforcement to be fixed in the retaining wall substrate according to design when the first prestressed reinforcement, the second prestressed reinforcement and the third prestressed reinforcement are bound, arranging wall modules and buttress placement and positioning grooves according to design, and casting concrete to complete construction of the retaining wall substrate;

step 3, hoisting and installing the wall module at the lowest layer in a positioning groove of a retaining wall base plate, enabling four first prestressed reinforcements to extend into a square cavity of the wall module during hoisting and installing, enabling four third prestressed reinforcements to extend into first prestressed reinforcement channels at four corners in the wall module, and sequentially stacking the wall module to the designed height of the retaining wall from bottom to top;

step 4, hoisting and installing the prefabricated component buttress columns into the positioning grooves of the retaining wall foundation, and inserting four second prestressed reinforcements into second prestressed reinforcement channels in the buttress columns during hoisting and installation;

step 5, pouring partial mortar into the first prestressed reinforcement channel, the second prestressed reinforcement channel and the square cavity, pouring the mortar to the top of the retaining wall after the mortar reaches the design strength and applying prestress through a tensioning end anchorage device at the top, and tightly connecting a plurality of wall modules, the wall modules and the retaining wall base plate with the buttress columns and the retaining wall base plate through the first prestressed reinforcement channel, the second prestressed reinforcement channel and the post-poured square columns of the square cavity to form a whole;

step 6, repeating the steps to the step, completing the construction of a plurality of retaining wall units, and forming a continuous retaining wall support;

and 7, pouring concrete in the gap of the positioning groove of the retaining wall substrate.

Has the advantages that: the assembled prestressed retaining wall provided by the invention adopts a factory standard prefabrication and field installation construction mode, has the advantages of short assembly period and high prefabricated part quality, reduces labor cost and template cost, and meanwhile, in the construction of the large and medium-sized urban road and bridge approach engineering, if the construction of the road shoulder retaining wall is limited by surrounding buildings, the assembled prestressed retaining wall is required to be adopted for construction, so that the construction of developers is convenient and rapid, the structure is simple, the safety and reliability are realized, the transportation is convenient, the height of the retaining wall can be adjusted according to the actual situation of the engineering, the connection mode among all components is reliable, and the stress is reasonable.

Drawings

Fig. 1 is a schematic structural view of an assembled prestressed retaining wall provided by the present invention;

FIG. 2 is a perspective view of a wall module in the fabricated prestressed retaining wall according to the present invention;

FIG. 3 is a perspective view of a buttress in the fabricated prestressed retaining wall provided in accordance with the present invention;

FIG. 4 is a schematic structural view of a retaining wall substrate in the fabricated prestressed retaining wall according to the present invention;

FIG. 5 is a schematic plan view of an assembled prestressed retaining wall according to the present invention;

fig. 6 is a schematic view of a foundation plane of the fabricated prestressed retaining wall provided by the present invention.

In the figure, 1 is a wall module; 1-1 is a square cavity; 1-2 are hollow reinforcing steel bars; 1-3 is a first prestressed reinforcement channel; 1-4 are right-angle gaps; 2 is a buttress; 2-1 is a second prestressed reinforcement channel; 3 is a retaining wall base plate; 3-1 is a positioning groove; 3-2 is a first prestressed reinforcement; 3-3 is a second prestressed reinforcement; 3-4 is a third prestressed reinforcement; 3-5 is an anchor head of the prestressed reinforcement; and 4, an anchorage device at the tensioning end.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

As shown in fig. 1 to 6, the invention provides an assembled prestressed retaining wall, which includes wall modules 1, buttress columns 2 and retaining wall substrates 3, wherein a retaining wall unit is arranged between two buttress columns 2, each retaining wall unit is composed of a plurality of layers of wall modules 1, the buttress columns 2 are located at the butt joint position of the two retaining wall units and at the two ends of the retaining wall unit, a square cavity 1-1 is arranged at the central position of each wall module 1, the inner wall of the square cavity 1-1 is fixedly connected with a plurality of the buttress columns 1-2, a first prestressed reinforcement channel 1-3 is arranged at the four corners of the upper surface of each wall module 1, a right-angled notch 1-4 is arranged at the two corners of the long edge of one side of each wall module 1, four second prestressed reinforcement channels 2-1 are vertically arranged on the inner wall of each buttress column 2, the upper surface of the retaining wall base plate 3 is provided with a positioning groove 3-1, the positioning groove 3-1 is fixedly connected with a first prestressed reinforcement 3-2, a second prestressed reinforcement 3-3 and a third prestressed reinforcement 3-4 respectively, the bottoms of the first prestressed reinforcement 3-2, the second prestressed reinforcement 3-3 and the third prestressed reinforcement 3-4 are fixedly connected with prestressed reinforcement anchor heads 3-5, the prestressed reinforcement anchor heads 3-5 are located inside the retaining wall base plate 3, and the tops of the first prestressed reinforcement 3-2, the second prestressed reinforcement 3-3 and the third prestressed reinforcement 3-4 are fixedly connected with a tensioning end anchorage 4.

As a further improvement of the invention, the wall module 1 and the buttress columns 2 are both prefabricated reinforced concrete members.

As a further improvement of the present invention, the retaining wall substrate 3 is a reinforced concrete member cast in place.

As a further improvement of the invention, the two retaining wall units are butted and spliced into a groove through two right-angle notches 1-4, the buttress columns 2 are arranged at the groove, and the height of the wall module 1 is 300-500 mm.

As a further improvement of the invention, the side length of the square cavity 1-1 is 180-240 mm.

As a further improvement of the invention, the diameter of the first prestressed reinforcement channel 1-3 is 3-4 cm.

As a further improvement of the invention, the shape of the buttress column 2 is a cylinder structure with rectangular upper and lower surfaces, the width of the buttress column 2 is equal to the width of a groove formed by splicing two right-angle notches 1-4 after the retaining wall units are butted, the length of the rectangle on the upper surface of the buttress column 2 is less than that of the rectangle on the lower surface, and the diameter of each second prestressed reinforcement channel 2-1 is 3-4 cm.

As a further improvement of the invention, the first prestressed reinforcement 3-2 penetrates through the square cavity 1-1, the second prestressed reinforcement 3-3 penetrates through the second prestressed reinforcement channel 2-1, the buttress column 2 is connected with the retaining wall base plate 3, and the third prestressed reinforcement 3-4 penetrates through the first prestressed reinforcement channel 1-3.

As a further improvement of the invention, the heights of the first prestressed reinforcement 3-2, the second prestressed reinforcement 3-3 and the third prestressed reinforcement 3-4 exceed 316 cm of the earth wall substrate.

The construction steps of the assembled prestressed retaining wall are as follows:

step 1, leveling a site, performing construction preparation, and stacking all prefabricated components in the construction site for later use according to engineering requirements;

step 2, casting a retaining wall substrate 3 in situ, reserving anchor heads 3-5 of the prestressed reinforcements at the tops of the first prestressed reinforcement 3-2, the second prestressed reinforcement 3-3 and the third prestressed reinforcement 3-4 to be fixed in the retaining wall substrate 3-5 according to design when binding the first prestressed reinforcement 3-2, the second prestressed reinforcement 3-3 and the third prestressed reinforcement 3-4, arranging a wall module 1 and a buttress column 2 to place and position a groove 3-1 according to design, and casting concrete to complete construction of the retaining wall substrate 3;

step 3, hoisting and installing the wall module 1 at the lowest layer in a positioning groove 3-1 of a retaining wall base plate 3, enabling four first prestressed reinforcements 3-2 to extend into a square cavity 1-1 of the wall module 1 during hoisting and installing, enabling four third prestressed reinforcements 3-4 to extend into first prestressed reinforcement channels 1-3 at four corners in the wall module 1, and sequentially stacking the wall module 1 to the designed height of the retaining wall from bottom to top;

step 4, hoisting and installing the prefabricated component buttress column 2 in a positioning groove 3-1 of a retaining wall foundation, and inserting four second prestressed reinforcements 3-3 into a second prestressed reinforcement channel 2-1 in the buttress column during hoisting and installation;

step 5, pouring partial mortar into the first prestressed reinforcement channel 1-3, the second prestressed reinforcement channel 2-1 and the square cavity 1-1, pouring the mortar to the top of the retaining wall after the mortar reaches the design strength and applying prestress through a tensioning end anchorage 4 at the top, and tightly connecting the wall modules 1, the wall modules 1 and the retaining wall base plate 3 with the buttress columns 2 and the retaining wall base plate 3 to form a whole through post-pouring square columns of the first prestressed reinforcement channel 1-3, the second prestressed reinforcement channel 2-1 and the square cavity 1-1;

step 6, repeating the steps 2 to 5, completing the construction of a plurality of retaining wall units, and forming a continuous retaining wall support;

and 7, pouring concrete in the gap of the positioning groove 3-1 of the retaining wall substrate 3.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.