阅读说明：本技术 一种模块化装配式挡土墙及其施工方法 (Modular assembly type retaining wall and construction method thereof ) 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：一种模块化装配式挡土墙及其施工方法,属于岩土工程领域,包括挡土墙基础、叠合板、后浇二次混凝土、中间连接柱和两端连接柱,两个连接柱之间设置一个挡墙单元,所述挡土墙基础为现浇钢筋混凝土构件,挡土墙基础上表面设置有与挡墙单元和连接柱相匹配的定位凹槽,所述叠合板设置于连接柱的凹槽处之间,在两块叠合板中间浇筑有二次混凝土。本发明的叠合板和连接柱均为预制钢筋混凝土构件,挡土墙基础为现浇钢筋混凝土构件,施工时通过现场吊装、后浇混凝土和预应力钢筋连接进行装配,极大地提高了施工效率,节约了人工成本,保证了挡土墙质量。(The utility model provides a modularization assembled retaining wall and construction method thereof, belongs to the geotechnical engineering field, including retaining wall basis, superimposed sheet, post-cast secondary concrete, intermediate junction post and both ends spliced pole, set up a barricade unit between two spliced poles, the retaining wall basis is cast in situ reinforced concrete component, and retaining wall basis upper surface is provided with barricade unit and spliced pole assorted positioning groove, the superimposed sheet sets up between the groove of spliced pole, has pour the secondary concrete in the middle of two superimposed sheets. The laminated slab and the connecting column are both prefabricated reinforced concrete components, the retaining wall foundation is a cast-in-place reinforced concrete component, and the retaining wall is assembled by hoisting on site, connecting post-cast concrete and prestressed reinforcement during construction, so that the construction efficiency is greatly improved, the labor cost is saved, and the quality of the retaining wall is ensured.)

1. The utility model provides a modularization assembled retaining wall which characterized in that: including retaining wall basis (4), superimposed sheet (3), post-cast secondary concrete (5), middle spliced pole (1) and both ends spliced pole (2), superimposed sheet (3), middle spliced pole (1), both ends spliced pole (2) are prefabricated reinforced concrete component, set up a barricade unit between two spliced poles, middle spliced pole (1) cross-section is H shape, sets up in the intermediate space position of retaining wall, and both ends spliced pole (2) cross-section is the T style of calligraphy, sets up in the holistic both ends of retaining wall, be equipped with four prestressed reinforcement passageways (1-1) on the inside post longitudinal direction of edge of spliced pole four corners department, retaining wall basis (4) are cast in situ reinforced concrete component, and retaining wall basis (4) upper surface is provided with barricade unit and spliced pole assorted positioning groove (4-1), be equipped with in positioning groove (4-1) with the prestressed reinforcement passageway (1-1) position of spliced pole The middle connecting column (1) and the two end connecting columns (2) are connected with the retaining wall foundation (4) through the vertical prestressed reinforcements (4-2), the laminated slab (3) is arranged between the grooves of the connecting columns, reserved steel bar pore canals (1-2) are transversely arranged on the web plates of the connecting columns from top to bottom, one surface of the laminated slab (3) is provided with a surface reserved steel bar (3-1), one surface of the surface reserved steel bar (3-1) of the laminated slab (3) faces the post-cast secondary concrete (5), the laminated slab (3) is connected with a connecting column through a reserved steel bar hole (1-2) penetrating through the connecting column through a horizontal connecting steel bar (5-1) and a surface reserved steel bar (3-1) arranged on one surface of the laminated slab (3), and secondary concrete (5) is poured between the two laminated slabs (3).

2. A modular fabricated retaining wall according to claim 1, characterized in that: the depth of the positioning groove (4-1) is 100-200 mm.

3. A modular fabricated retaining wall according to claim 1, characterized in that: the anchor head (4-3) of the vertical prestressed reinforcement (4-2) is arranged at the bottom of the vertical prestressed reinforcement and fixed in the retaining wall foundation (4), and the tensioning end anchorage device (6) is arranged at the upper part of the vertical prestressed reinforcement (4-2).

4. A modular fabricated retaining wall according to claim 1, characterized in that: the surface reserved steel bars (3-1) of the laminated slab (3) are a plurality of groups of C-shaped steel bars arranged from top to bottom, a vertical steel bar is arranged between vertical C-shaped steel bars to form a group of surface reserved steel bars (3-1), and a plurality of groups of surface reserved steel bars (3-1) are transversely arranged along the laminated slab (3).

5. A construction method of a modular assembly type retaining wall is characterized in that: the method comprises the following steps:

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

step 2, casting a retaining wall foundation (4) in situ, reserving vertical prestressed reinforcements (4-2) according to design when binding the reinforcements, fixing anchor heads (4-3) of the vertical prestressed reinforcements in the retaining wall foundation, arranging positioning grooves (4-1) for placing retaining wall units and connecting columns according to design when supporting templates, and pouring concrete to complete construction of the retaining wall foundation (4);

step 3, hoisting and installing the connecting column in a positioning groove of a retaining wall foundation (4), enabling four vertical prestressed reinforcements (4-2) to extend into four prestressed reinforcement channels (1-1) of the connecting column during hoisting and installing, pouring partial mortar into the prestressed reinforcement channels (1-1), and 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 (6) at the top;

step 4, extending the horizontal connecting steel bars (5-1) into the reserved steel bar pore canals (1-2) of the connecting columns, connecting the horizontal connecting steel bars (5-1) by using steel bar sleeves, and arranging joints of the horizontal connecting steel bars (5-1) in the post-cast secondary concrete (5);

step 5, arranging laminated slabs (3) between the connecting columns, arranging two laminated slabs (3) on each retaining wall unit, arranging two ends of each laminated slab in a groove of the connecting column, enabling one surface of a reserved steel bar (3-1) on the surface of each laminated slab to face towards the post-cast secondary concrete (5), and pouring the secondary concrete (5) between the two laminated slabs (3) to enable the connecting columns, the laminated slabs (3) and the post-cast secondary concrete (5) to form a whole;

and 6, pouring concrete in the gap of the retaining wall foundation groove (4-1) to complete the construction of the retaining wall and form continuous retaining wall support.

Technical Field

The invention belongs to the field of geotechnical engineering, and particularly relates to a modular assembly type retaining wall and a construction method thereof.

Background

The retaining wall is a common retaining building which is widely applied to highways, railways, municipal works and hydraulic engineering. Traditional river course retaining wall generally adopts modes such as stone piling, concrete cast-in-place to build, and not only the construction is more troublesome, and the cost is higher, and our country is at present most retaining wall all adopts the earth block retaining wall of thick liquid building or all kinds of retaining walls of concrete, and is not good with the coordination degree of all ring edge borders, in addition, the engineering volume is big, and construction speed is slow, needs a large amount of manual works. The traditional integral cast-in-situ retaining wall construction relates to the procedures of pouring, maintaining, template dismantling and the like of a vertical template and a concrete mortar, has long construction period, is not easy to control the construction quality, and causes certain damage to the surrounding environment. Therefore, the modular assembly retaining wall is a trend in future development.

The modular assembly type retaining wall adopts the modes of factory standard prefabrication and field installation and construction, has the advantages of short assembly period and high quality of prefabricated parts, and is continuously popularized. Meanwhile, in the construction of the large and medium-sized urban roads and bridge approach projects, if the construction of the road shoulder retaining wall is limited by surrounding buildings, the assembled retaining wall is required to be adopted for construction.

Disclosure of Invention

In order to solve the technical problems, the invention provides a modular assembly type retaining wall and a construction method thereof, and mainly aims to develop the assembly type retaining wall which is convenient and rapid to construct, simple in structure, safe and reliable, convenient to transport and reasonable in stress.

The technical scheme adopted by the invention is as follows:

the utility model provides a modularization assembled retaining wall, includes retaining wall basis, superimposed sheet, post-cast secondary concrete, middle spliced pole and both ends spliced pole, superimposed sheet, middle spliced pole, both ends spliced pole are prefabricated reinforced concrete component, set up a barricade unit between two spliced poles, middle spliced pole cross-section is H shape, sets up in the intermediate space position of retaining wall, and both ends spliced pole cross-section is the T style of calligraphy, sets up in the holistic both ends of retaining wall, the spliced pole four corners department is inside to be equipped with four prestressed reinforcement passageways on the post longitudinal direction, the retaining wall basis is cast-in-place reinforced concrete component, and the retaining wall basis upper surface is provided with barricade unit and spliced pole assorted positioning groove, be equipped with the prestressed reinforcement passageway position assorted vertical prestressed reinforcement with the spliced pole in the positioning groove, middle spliced pole, intermediate spliced pole, post, both ends spliced pole links to each other through vertical prestressed reinforcement and retaining wall basis, the superimposed sheet sets up between the groove of spliced pole, the extremely up and down transversely is equipped with reserved steel bar pore on the web of spliced pole, the one side of superimposed sheet is equipped with the surperficial reserved steel bar, and the surface reserved steel bar of superimposed sheet is one face towards the post-cast secondary concrete, superimposed sheet and spliced pole run through the reserved steel bar pore in the spliced pole and the surperficial reserved steel bar that the superimposed sheet set up through the horizontal connection reinforcing bar link to each other, have pour the secondary concrete in the middle of two superimposed sheets.

Further, the depth of the positioning groove is 100-200 mm.

Furthermore, the anchor head of the vertical prestressed reinforcement with the bottom provided with the vertical prestressed reinforcement is fixed in the retaining wall foundation, and the upper part of the vertical prestressed reinforcement is provided with an anchorage at the tensioning end.

Furthermore, the surface reserved steel bars of the laminated slab are a plurality of groups of C-shaped steel bars from top to bottom, a vertical steel bar is arranged between vertical C-shaped steel bars to form a group of surface reserved steel bars, and a plurality of groups of surface reserved steel bars are transversely arranged along the laminated slab.

A construction method of a modular fabricated retaining wall comprises the following steps:

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

step 2, casting a retaining wall foundation in situ, reserving vertical prestressed steel bars according to design when binding the steel bars, fixing anchor heads of the vertical prestressed steel bars in the retaining wall foundation, arranging positioning grooves for placing retaining wall units and connecting columns according to the design when supporting templates, and pouring concrete to complete construction of the retaining wall foundation;

step 3, hoisting and installing the connecting column in a positioning groove of a retaining wall foundation, extending four vertical prestressed reinforcements into four prestressed reinforcement channels of the connecting column during hoisting and installing, pouring partial mortar into the prestressed reinforcement channels, and 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;

step 4, extending the horizontal connecting steel bars into the reserved steel bar hole channels of the connecting columns, connecting the horizontal connecting steel bars by using steel bar sleeves, and arranging joints of the horizontal connecting steel bars in the post-cast secondary concrete;

step 5, arranging laminated slabs between the connecting columns, arranging two laminated slabs on each retaining wall unit, arranging two ends of each laminated slab in the groove of the connecting column, reserving reinforcing steel bars on the surfaces of the laminated slabs, pouring secondary concrete with one surface facing to the rear part, and pouring secondary concrete between the two laminated slabs so that the connecting columns, the laminated slabs and the rear part pouring secondary concrete form a whole;

and 6, pouring concrete in the gap of the retaining wall foundation groove to complete the construction of the retaining wall and form a continuous retaining wall support.

The invention has the beneficial effects that:

1. the invention reduces the labor cost and the template cost through an assembly method.

2. The invention is a prefabricated component, and has the advantages of convenient construction, high construction speed and convenient transportation.

3. The invention not only can adjust the height of the retaining wall according to the actual project, but also has reliable connection mode among all components and reasonable stress.

Drawings

FIG. 1 is a perspective view of a retaining wall of the present invention;

FIG. 2 is a perspective view of the middle connecting column of the present invention;

FIG. 3 is a perspective view of a laminated panel according to the present invention;

FIG. 4 is a perspective view of the foundation and prestressed reinforcement of the present invention;

FIG. 5 is a schematic transverse cross-sectional view of the present invention;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;

fig. 7 is a plan view of a retaining wall foundation of the present invention.

In the figure, 1 is a middle connecting column; 2 is a connecting column at two ends; 3 is a laminated plate; 4, a retaining wall foundation; 5, post-pouring secondary concrete; 6 is an anchorage device at a tensioning end; 7, filling soil behind the wall; 1-1 is a prestressed reinforcement channel; 1-2 is a reserved steel bar channel for horizontally connecting steel bars; 3-1, reserving reinforcing steel bars on the surface of the laminated slab; 4-1 is a positioning groove; 4-2 is prestressed reinforcement; 4-3 is an anchor head of the prestressed reinforcement; 5-1 is a horizontal connecting steel bar.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

The utility model provides a modularization assembled retaining wall, assembled retaining wall by retaining wall basis 4, superimposed sheet 3, post-cast secondary concrete 5, middle spliced pole 1 and both ends spliced pole 2 constitute, retaining wall basis 4 and post-cast secondary concrete 5 are cast in situ concrete, superimposed sheet 3, middle spliced pole 1 and both ends spliced pole 2 are prefabricated reinforced concrete component, arrange a barricade unit between two spliced poles, every barricade unit comprises two superimposed sheets 3 and its middle post-cast secondary concrete 5, the barricade height can be according to the actual adjustment of engineering.

The middle connecting column 1 and the connecting columns 2 at the two ends are prefabricated reinforced concrete members, the middle connecting column 1 has an H-shaped section, the middle of the retaining wall is arranged at intervals, connecting columns 2 at two ends are T-shaped sections, two ends of the whole retaining wall are arranged, four prestressed reinforcement channels 1-1 are arranged at four corners of the connecting columns, the connecting column and the retaining wall foundation 4 are connected into a whole through the prestressed reinforcement 4-2 fixedly connected with the retaining wall foundation, the groove of the connecting column is connected with the laminated slab 3, the web plate of the connecting column is provided with a reserved reinforcement hole channel 1-2, the horizontal connecting reinforcement 5-1 is extended into the connecting column and then is integrated with the post-cast secondary concrete 5, the connection between the horizontal connecting reinforcements 5-1 is connected by a reinforcement sleeve, the steel bar sleeve structure is in the prior art, and the joint of the horizontal connecting steel bar 5-1 is arranged in the post-cast secondary concrete 5.

The composite slab is characterized in that the composite slab 3 is a prefabricated reinforced concrete member, one surface of the composite slab 3 is provided with reserved steel bars 3-1, two ends of the composite slab are arranged in grooves of the connecting column during construction, one surface of the reserved steel bars 3-1 of the surface of the composite slab faces towards the post-cast secondary concrete 5, and the secondary concrete 5 is poured between the two composite slabs 3, so that the connecting column, the composite slab 3 and the post-cast secondary concrete 5 form a whole.

The retaining wall foundation 4 is a cast-in-place reinforced concrete member, the upper surface of the retaining wall foundation 4 is provided with a retaining wall unit and a positioning groove 4-1 of a connecting column, the depth of the groove can be 100 plus 200mm, vertical prestressed reinforcements 4-2 are arranged in the positioning groove according to the position of a prestressed reinforcement channel 1-1 of the connecting column, and an anchor head 4-3 of the vertical prestressed reinforcements is fixed in the retaining wall foundation.

The construction steps of the invention are as follows: step 1, leveling a site, performing construction preparation, and stacking all prefabricated components in a construction site for later use according to engineering requirements;

step 2, casting a retaining wall foundation 4 in situ, reserving vertical prestressed reinforcements 4-2 according to design when binding the reinforcements, fixing anchor heads 5 of the vertical prestressed reinforcements in the retaining wall foundation, arranging grooves 4-1 for placing and positioning retaining wall units and connecting columns according to design when supporting templates, and pouring concrete to complete construction of the retaining wall foundation 4;

step 3, hoisting and installing the connecting column in a positioning groove of a retaining wall foundation 4, extending four vertical prestressed reinforcements 4-2 into four prestressed reinforcement channels 1-1 of the connecting column during hoisting and installing, pouring partial mortar into the prestressed reinforcement channels 1-1, and 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 6 at the top;

step 4, extending the horizontal connecting steel bars 5-1 into the reserved steel bar hole channels 1-2 of the connecting columns, connecting the horizontal connecting steel bars 5-1 by using steel bar sleeves, and arranging joints of the horizontal connecting steel bars 5-1 in the post-cast secondary concrete 5;

step 5, arranging laminated slabs 3 between the connecting columns, arranging two laminated slabs 3 on each retaining wall unit, arranging two ends of each laminated slab in a groove of the connecting column, reserving reinforcing steel bars 3-1 on the surfaces of the laminated slabs, enabling one surface of each laminated slab to face the post-cast secondary concrete 5, and pouring the secondary concrete 5 between the two laminated slabs 3 to enable the connecting columns, the laminated slabs 3 and the post-cast secondary concrete 5 to form a whole;

and 6, pouring concrete in the gap of the retaining wall foundation groove 4-1 to complete the construction of the retaining wall and form a continuous retaining wall support.