CN220284873U

CN220284873U - Retaining wall structure

Info

Publication number: CN220284873U
Application number: CN202322216124.0U
Authority: CN
Inventors: 王君宇; 曹晓维; 汤若濛; 张韵成; 徐士杰; 常浩; 彭焜; 杜巍
Original assignee: Third Construction Co Ltd of China Construction Third Engineering Division
Current assignee: Third Construction Co Ltd of China Construction Third Engineering Division
Priority date: 2023-08-16
Filing date: 2023-08-16
Publication date: 2024-01-02
Anticipated expiration: 2033-08-16

Abstract

The utility model discloses a retaining wall structure, which comprises a foundation, a retaining wall main body and a surface layer structure, wherein the retaining wall main body is arranged on the foundation; the retaining wall main body is formed by sequentially carrying out slope returning and stacking on a plurality of wall units, and the inner sides of the wall units are adjacent to a plain soil layer; the wall body unit comprises a geogrid, and the geogrid horizontally extends into the plain soil layer; the outer side of the wall body unit of the bottom layer is fixed on the foundation. The beneficial effects of the utility model are as follows: the retaining wall body is formed by connecting a plurality of wall units which are stacked up and down in a slope-reversing mode sequentially, wherein the concrete blocks are of a prefabricated structure, the upper concrete blocks and the lower concrete blocks are connected through mortise and tenon joints, and compared with the existing masonry structure, the structure is prefabricated in a factory, cast-in-situ construction is reduced, and site construction is simple and convenient.

Description

Retaining wall structure

Technical Field

The utility model relates to a building structure, in particular to a retaining wall structure.

Background

The retaining wall is a structure for supporting roadbed filled soil or landslide soil and preventing deformation and instability of the filled soil or soil, and is widely applied to the fields of highway, railway and urban construction, and is also applied to the fields of dam construction, river bed improvement, port engineering, water and soil conservation, land planning, landslide prevention and the like.

At present, the existing retaining wall mostly adopts a masonry structure, the wall body is large and heavy, the consumption of materials is large, the requirement of cast-in-place concrete on a construction site is high, the construction process is complex, and the construction is inconvenient; the cast-in-situ construction period is longer, and the engineering cost is high; the pollution to the environment caused by the cast-in-place construction is large. In addition, the tensile properties of masonry structures are generally poor, resulting in the structure being prone to cracking, and presenting a potential safety hazard to the structure.

Disclosure of Invention

The utility model aims to provide a retaining wall structure with simple construction, aiming at the defects of the prior art.

The utility model adopts the technical scheme that: a retaining wall structure, comprising a foundation, a retaining wall main body and a surface layer structure;

the retaining wall main body is formed by sequentially carrying out slope returning and stacking on a plurality of wall units, and the inner sides of the wall units are adjacent to a plain soil layer;

the wall body unit comprises a geogrid, and the geogrid horizontally extends into the plain soil layer;

the outer side of the wall body unit of the bottom layer is fixed on the foundation;

a capping beam and a surface layer structure are arranged on the wall body unit of the top layer;

and a guardrail is arranged on the capping beam.

According to the scheme, the wall unit further comprises a broken stone water filtering layer and a concrete layer which are flush at the top; the broken stone water filtering layer is paved on the geogrid along the side slope of the plain soil layer, and the inner side of the broken stone water filtering layer is the plain soil layer; the concrete layer is fixed on the outer side of the crushed stone water filtering layer, and the edge of the geogrid is pressed on the lower part of the concrete layer or fixed on the side part of the concrete layer.

According to the scheme, the concrete layer is a multilayer structure formed by stacking prefabricated concrete blocks in a slope-returning mode, the prefabricated concrete blocks located on the same layer are sequentially and horizontally distributed along the length direction of the retaining wall, and the upper prefabricated concrete block and the lower prefabricated concrete block are staggered and connected through mortise and tenon joints.

According to the scheme, the top of the precast concrete block is provided with the groove, and the bottom of the precast concrete block is provided with the convex block; between the upper layer and the lower layer of concrete blocks, the convex blocks at the bottom of the upper layer of precast concrete blocks are inserted into the grooves at the top of the lower layer of precast concrete blocks, and the convex blocks and the walls of the grooves are brushed with joint mixture.

According to the scheme, the foundation is provided with the groove matched with the convex blocks, and the convex blocks at the bottom of the precast concrete block at the lowest layer are inserted into the groove of the foundation to be fixedly connected.

According to the scheme, the precast concrete blocks are precast by C30 concrete.

According to the scheme, the section compressive strength of the precast concrete block is not lower than 2100KN.

According to the scheme, the crushed stone water filtering layer of the top wall unit extends inwards, and the surface layer structure is arranged on the crushed stone water filtering layer of the top wall unit.

According to the scheme, the surface layer structure comprises a reinforced concrete foundation pad layer, a cement mortar layer and a granite stone plate from bottom to top.

According to the scheme, the foundation is of a reinforced concrete structure.

The beneficial effects of the utility model are as follows: the retaining wall main body is formed by connecting a plurality of wall units which are stacked up and down in a slope-reversing manner in sequence, wherein the precast concrete blocks are of a precast structure, and the precast concrete blocks are connected with each other in a mortise-tenon mode, namely, are connected with the grooves in an inserting manner through the convex blocks; the wall body unit sets up geogrid, has improved the tensile property of retaining wall body, and geogrid horizontal extension reaches in the plain soil layer of inboard, can improve the intensity of soil body, increases the stability of soil body.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 2 is an enlarged schematic view of the surface layer structure in the present embodiment.

FIG. 3 is a schematic view of a precast concrete segment in the present embodiment

Fig. 4 is a front view showing the connection of the upper and lower precast concrete segments in this embodiment.

Fig. 5 is a side view showing the connection of the upper and lower precast concrete segments in this embodiment.

Wherein: 1. guard bars; 2. a facing structure; 3. prefabricating concrete blocks; 4. a bump; 5. planting soil; 6. a foundation; 6.1, C30 concrete; 6.2, reinforcing steel bars; 7. a crushed stone water filtering layer; 8. a plain soil layer; 9. geogrid; 10. a groove; 11. a reinforced concrete foundation mat; 12. a cement mortar layer; 13. granite stone plate; 14. a capping beam; 15. a water intercepting ditch; 16. backfill layer of gravelly soil; 17. a plant; 18. and (3) a caulking agent.

Detailed Description

For a better understanding of the present utility model, the present utility model is further described below with reference to the drawings and specific examples.

A retaining wall structure as in fig. 1, comprising a foundation 6, a retaining wall body and a facing structure 2;

the retaining wall body is formed by sequentially carrying out slope returning and stacking (namely, slope returning and stacking is carried out in the direction of the soil layers 8, as shown in fig. 1), and the inner sides of the wall units are adjacent to the soil layers 8;

the wall body unit comprises a geogrid 9, and the geogrid 9 horizontally extends into the plain soil layer 8;

the wall units at the bottom layer are fixed on the foundation 6;

the wall body unit of the top layer is provided with a capping beam 14 and a surface layer structure 2;

the guardrail 1 is arranged on the capping beam 14.

In the present utility model, below the foundation 6 is shown a gravel backfill layer 16. The top capping beam 14 is flush with the top of the facing structure 2, and the top capping beam 14 is located outside the top wall unit.

Preferably, the wall unit further comprises a crushed stone water filtering layer 7 and a concrete layer with the upper surface being flush; the broken stone water filtering layer 7 is paved on the geogrid 9 along the side slope of the plain soil layer 8, and the plain soil layer 8 is arranged on the inner side of the broken stone water filtering layer 7; the concrete layer is fixed on the outer side of the crushed stone water filtering layer 7, and the edge of the geogrid 9 is pressed on the lower part of the concrete layer or fixed on the side part of the concrete layer.

Preferably, the concrete layer is a multi-layer structure formed by stacking prefabricated concrete blocks 3 in a sloping manner, and the prefabricated concrete blocks 3 positioned on the same layer are sequentially and horizontally arranged along the length direction of the retaining wall; the upper layer precast concrete blocks 3 and the lower layer precast concrete blocks are staggered and are inserted through mortise and tenon joints.

Specifically, a groove 10 is formed in the top of the precast concrete segment 3, and a bump 4 is arranged at the bottom of the precast concrete segment 3; between the upper layer precast concrete blocks and the lower layer precast concrete blocks, the convex blocks 4 at the bottom of the upper layer precast concrete blocks 3 are inserted into the grooves 10 at the top of the lower layer precast concrete blocks 3, and gaps between the convex blocks 4 and the grooves 10 are filled with joint compound 18. The lowest precast concrete segment 3 of the bottom wall unit is connected with the foundation 6, specifically, the foundation 6 is provided with a groove 10 adapted to the protruding block 4, and the protruding block 4 at the bottom of the lowest precast concrete segment 3 is inserted into the groove 10 of the foundation 6 to be fixedly connected.

In the utility model, the precast concrete block 3 is precast by C30 semi-dry concrete; the cross-sectional compressive strength of the precast concrete segments 3 must not be lower than 2100KN.

In this embodiment, the concrete layer of each wall unit comprises three layers of precast concrete segments 3; the upper layer of precast concrete blocks 3 are in plug connection with the precast concrete blocks 3 on the two sides below, namely, the two sides of the bottom of the upper layer of precast concrete blocks 3 are provided with lugs 4 which are respectively inserted into grooves 10 on the tops of the precast concrete blocks 3 on the two sides below; the outer side edge of the geogrid 9 is arranged between the upper precast concrete segment 3 and the lower precast concrete segment 3 or is directly fixed on the precast concrete segment 3.

In the utility model, the crushed stone water filtering layer 7 of the top wall unit extends inwards, and the surface layer structure 2 is arranged on the crushed stone water filtering layer 7 of the top wall unit.

Preferably, the facing structure includes a reinforced concrete foundation mat 11, a cement mortar layer 12 and a granite stone slab 13 from bottom to top. The capping beam 14 is of a reinforced concrete structure, and is cast in situ integrally with the reinforced concrete foundation pad layer 11, so that the overall stability of the slope top of the retaining wall is effectively enhanced.

In this embodiment, the granite slab 13 has a thickness of 50mm; the thickness of the cement mortar layer 12 is 30mm, and the cement mortar ratio is 1:2.5; the thickness of the reinforced concrete foundation mat 11 is 150mm.

In the utility model, the retaining wall is also provided with a water interception ditch 15, the water interception ditch 15 is positioned at the edge part of the surface layer structure 2, and the ditch bottom of the water interception ditch 15 is lower than the surface layer structure 2.

Preferably, the foundation 6 is arranged at the lower end of the slope, the foundation 6 is of a reinforced concrete structure, three-level ribbed steel bars 6.2 are arranged in the foundation, and the foundation is formed by pouring C30 concrete 6.1. In the utility model, planting soil 5 is arranged outside a foundation 6, and plants 17 are planted in the planting soil 5.

In the utility model, the construction process of the retaining wall structure comprises the steps of designing the retaining wall, prefabricating foundation engineering and components, installing panels, checking the panels, paving the geogrid 9, checking the geogrid 9, paving the filler, checking the filler, rolling, checking the compactness, constructing the wall top, attaching and waterproofing, and checking and accepting completion. Before construction, the retaining wall is designed according to the requirements. The concrete construction process is as follows:

step one, cleaning the ground, pouring a foundation 6, and prefabricating a concrete block 3.

Digging and flattening the ground within the range of the retaining wall bottom according to the design requirement, and after cleaning, backfilling the ground layer by layer, wherein the backfilling thickness of each backfilling layer is not more than 400mm; erecting a template, binding steel bars and pouring concrete to form a retaining wall foundation 6; meanwhile, the concrete blocks 3 are prefabricated according to the design requirements of the retaining wall.

Step two, constructing a first layer of wall units (namely, the lowest layer of wall units): the construction of the concrete layer, geogrid 9 and filler backfill of the first wall unit is completed.

(1) Concrete layer for installing the first layer wall unit: according to the wall inclination angle of the retaining wall, a combination mode of precast concrete blocks corresponding to the sloping is selected, the precast concrete blocks are installed according to the corresponding grooves 10, and the precast concrete blocks at the bottom layer are fixed on the foundation 6.

(2) The geogrid 9 is blanked and a first layer of geogrid 9, i.e. the geogrid 9 of the bottom layer, is laid.

(3) And (5) paving the filler.

Thirdly, constructing a second layer of wall units according to the second step, wherein the concrete layer of the second layer of wall units is fixed on the top of the concrete layer of the first layer of wall units and is connected with the grooves 10 through the bumps 4; paving the geogrid 9 of the second layer of wall units, wherein the geogrid 9 of the second layer of wall units is pressed on the lower part of the concrete blocks of the second layer of wall units; and paving backfill and broken stone water filtering layers 7 on the second-layer geogrid 9 to finish the construction of the second-layer wall body unit.

And fifthly, repeating the third step, and completing the construction of all the wall units sequentially from bottom to top until the designed height is reached.

Step six, paving geogrid 9 on the wall body units of the top layer, burying the edge parts of the geogrid 9 of the top layer into precast concrete blocks 3, and determining the length of the geogrid 9 according to requirements. Finally, the roof rail 14 and the facing structure 2 are arranged on top.

And step seven, designing a waterproof drainage pipeline and other structures by adopting conventional designs in industry. According to the use requirement, arranging a guardrail 1 and a water intercepting ditch 15 at the edge part of the retaining wall; the clear width of the water intercepting ditch 15 is not less than 300mm, and the depth is not less than 500mm.

And step eight, completion acceptance.

What is not described in detail in this specification is prior art known to those skilled in the art.

Finally, it should be noted that the foregoing is merely a preferred embodiment of the present utility model, and the present utility model is not limited thereto, and although the present utility model has been described in detail with reference to the embodiment, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but any modifications, equivalents, improvements or changes thereof may be made without departing from the spirit and principle of the present utility model.

Claims

1. The retaining wall structure is characterized by comprising a foundation, a retaining wall main body and a surface layer structure;

and a guardrail is arranged on the capping beam.

2. The retaining wall structure of claim 1, wherein the wall units further comprise a top flush crushed stone drainage layer and a concrete layer; the broken stone water filtering layer is paved on the geogrid along the side slope of the plain soil layer, and the inner side of the broken stone water filtering layer is the plain soil layer; the concrete layer is fixed on the outer side of the crushed stone water filtering layer, and the edge of the geogrid is pressed on the lower part of the concrete layer or fixed on the side part of the concrete layer.

3. The retaining wall structure of claim 2, wherein the concrete layer is a multi-layer structure formed by stacking precast concrete blocks in a reverse slope, the precast concrete blocks positioned on the same layer are sequentially and horizontally arranged along the length direction of the retaining wall, and the upper and lower precast concrete blocks are staggered and connected through mortise and tenon joints.

4. The retaining wall structure of claim 2, wherein the top of the precast concrete segments are provided with grooves and the bottom of the precast concrete segments are provided with bumps; between the upper layer and the lower layer of concrete blocks, the convex blocks at the bottom of the upper layer of precast concrete blocks are inserted into the grooves at the top of the lower layer of precast concrete blocks, and the convex blocks and the walls of the grooves are brushed with joint mixture.

5. The retaining wall structure of claim 4, wherein the foundation is provided with grooves adapted to the protrusions, and the protrusions at the bottom of the lowest precast concrete segments are inserted into the grooves of the foundation to be fixedly connected.

6. A retaining wall structure according to any one of claims 3 to 5, wherein the precast concrete segments are precast from C30 concrete.

7. A retaining wall structure according to claim 5, wherein the precast concrete segments have a cross-sectional compressive strength of not less than 2100KN.

8. The retaining wall structure of claim 2, wherein the crushed stone water filtering layer of the top wall unit extends inward, and the facing structure is provided on the crushed stone water filtering layer of the top wall unit.

9. The retaining wall structure of claim 8, wherein the facing structure comprises a bottom-up reinforced concrete foundation mat, a cement mortar layer, and granite stone slab.

10. The retaining wall structure of claim 1, wherein the foundation is a reinforced concrete structure.