High slope retaining wall structure

Abstract

This utility model relates to a retaining wall structure for high slopes, belonging to the technical field of slope retaining walls. It includes a retaining wall body, a drainage pipe, a gravel filter layer, and a mortar waterproofing layer. A replacement stone layer is provided in the foundation pit below the retaining wall body. The retaining wall body includes an upper retaining wall and a lower retaining wall. The drainage pipe is located inside the upper retaining wall, which has a supporting protrusion and a connecting recess in the middle of its bottom. The lower retaining wall has a connecting protrusion at its top middle. This utility model replaces the miscellaneous fill in the foundation pit below the retaining wall body with a replacement stone layer. The top inner side of the replacement stone layer has a supporting slope that supports the retaining wall body, allowing it to lean against the outer side of the lower slope, thus better preventing settlement of the retaining wall body. Furthermore, the retaining wall body is divided into an upper and lower retaining wall, which are cast separately, facilitating the construction of high slope retaining walls. The upper retaining wall also has a supporting protrusion at the bottom of the mortar waterproofing layer, further preventing the mortar waterproofing layer from sinking and ensuring effective drainage of the retaining wall body.

Description

Technical Field

[0001] This utility model relates to a high slope retaining wall structure and belongs to the field of slope retaining wall technology. Background Technology

[0002] Retaining walls are structures that support roadbed fill or hillside soil, preventing deformation and instability of the fill or soil. They are an important component of slope pavement. High slope retaining walls are retaining wall structures installed at the lower part of both sides of the slope. Currently, high slope retaining walls are constructed by pouring concrete for the retaining wall body, then installing drainage pipes on the upper part of the retaining wall body, and then installing a gravel filter layer on the inner side of the retaining wall corresponding to the drainage pipes. Below the gravel filter layer, a mortar waterproofing layer is installed. This allows water that seeps into the inner side of the retaining wall body from the slope to drain, preventing the retaining wall body from collapsing. However, the bottom of the mortar waterproofing layer lacks a rigid support structure, making it prone to settling. This can cause the water that has seeped into the inner side of the retaining wall body to be completely drained, affecting the function of the retaining wall body. Furthermore, in some places, the base layer at the bottom of the retaining wall body is miscellaneous fill or the foundation bearing capacity is insufficient, which can easily cause the retaining wall body to settle, affecting its use. Utility Model Content

[0003] This utility model provides a retaining wall structure for high slopes, which solves the problems existing in the background art.

[0004] This utility model relates to a retaining wall structure for high slopes, including a retaining wall body installed at the lower part of the slope on both sides of the slope. A drainage pipe is installed inside the upper part of the retaining wall body. A gravel filter layer and a mortar waterproofing layer are installed on the inner side of the upper part of the retaining wall body. A replacement stone slag layer is installed in the foundation pit below the retaining wall body. A supporting inclined surface is provided on the inner side of the top of the replacement stone slag layer to support the retaining wall body to be inclined and attached to the outer side of the lower part of the slope. The retaining wall body includes an upper retaining wall and a lower retaining wall. The drainage pipe is installed inside the upper retaining wall. A supporting protrusion is provided on the upper retaining wall below the lowest mortar waterproofing layer. A connecting recess is provided in the middle of the bottom of the upper retaining wall. A connecting protrusion that cooperates with the connecting recess is provided in the middle top of the lower retaining wall.

[0005] As a preferred embodiment, a connecting anchor rod is provided inside the connecting boss, and the upper end of the connecting anchor rod is cast into the upper retaining wall to ensure the connection strength at the connection between the upper and lower retaining walls.

[0006] As a preferred option, barbs are evenly provided on the outer side wall of the connecting anchor bolt to better connect and fix the upper and lower retaining walls.

[0007] As a preferred option, a sealing groove is provided at the connection joint between the inner and outer sides of the upper and lower retaining walls, and the sealing groove is filled with a sealing grout layer to better waterproof and seal the connection joint.

[0008] As a preferred embodiment, a limiting protrusion is provided on the top right side of the supporting protrusion, and a baffle plate is provided on the inner side of the gravel filter layer and the mortar waterproof layer. The bottom of the baffle plate extends to the bottom left side of the limiting protrusion, and the baffle plate can facilitate the arrangement and filling of the gravel filter layer and the mortar waterproof layer.

[0009] As a preferred option, a sidewalk is provided on the left side of the retaining wall body, and a debris platform is provided between the sidewalk and the retaining wall body. The debris platform can prevent rocks falling from the upper slope from falling directly onto the sidewalk.

[0010] As a preferred embodiment, the drainage pipe includes a PVC inner pipe, which is covered by a supporting steel pipe. Both ends of the PVC inner pipe are provided with supporting flanges at the ends of the supporting steel pipe. The outer walls of the supporting flanges at both ends are flush with the two side walls of the upper retaining wall, which can ensure the strength of the drainage pipe during the pouring of the upper retaining wall, prevent it from being crushed, and ensure its service life.

[0011] This utility model has the following beneficial effects:

[0012] By replacing the miscellaneous fill in the foundation pit below the retaining wall with a layer of crushed stone, and providing a supporting slope on the inner top of the crushed stone layer to support the retaining wall body inclined to the outer side of the lower part of the slope, the settlement of the retaining wall body is better prevented. Furthermore, the retaining wall body is divided into an upper retaining wall and a lower retaining wall, which are poured separately, facilitating the construction of retaining walls on high slopes. In addition, the upper retaining wall is equipped with a supporting protrusion at the bottom of the mortar waterproofing layer, which further prevents the mortar waterproofing layer from sinking and ensures the drainage effect of the retaining wall body. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0014] Figure 2 for Figure 1 Partial structural diagram Figure 1 ;

[0015] Figure 3 for Figure 1 Partial structural diagram Figure 2 ;

[0016] Figure 4 for Figure 2 Enlarged structural diagram at point A;

[0017] In the diagram: 1. Slope; 2. Side slope; 3. Limiting protrusion; 4. Supporting protrusion; 5. Replacement stone layer; 6. PVC inner pipe; 7. Mortar waterproofing layer; 8. Gravel filter layer; 9. Upper retaining wall; 10. Connecting anchor bolt; 11. Lower retaining wall; 12. Sidewalk; 13. Supporting ramp; 14. Debris platform; 15. Wall toe platform; 16. Mesh barrier; 17. Sealing grout layer; 18. Connecting recess; 19. Connecting protrusion; 20. Barbed bar; 21. Supporting steel pipe; 22. Supporting flange. Detailed Implementation

[0018] The present invention will be further described below with reference to the embodiments.

[0019] Example 1, as Figures 1 to 4 As shown, this utility model is a high slope retaining wall structure, including a retaining wall body set at the lower part of the slope 2 on both sides of the slope 1. A drainage pipe is provided in the upper part of the retaining wall body. A gravel filter layer 8 and a mortar waterproof layer 7 are provided on the inner side of the upper part of the retaining wall body. A replacement stone slag layer 5 is provided in the foundation pit below the retaining wall body. A support slope 13 is provided on the inner side of the top of the replacement stone slag layer 5 to support the retaining wall body to be inclined and attached to the outer side of the lower part of the slope 2. The retaining wall body includes an upper retaining wall 9 and a lower retaining wall 11. The drainage pipe is set in the upper retaining wall 9. A support protrusion 4 is provided on the upper retaining wall 9 below the lowest mortar waterproof layer 7. A connecting recess 18 is provided in the middle of the bottom of the upper retaining wall 9. A connecting protrusion 19 that cooperates with the connecting recess 18 is provided in the middle top of the lower retaining wall 11.

[0020] During construction, the first step is to survey and lay out the excavation boundary lines, remove all obstacles such as weeds and garbage from the retaining wall area, dig temporary drainage ditches around the foundation trench, and excavate the foundation pit using an excavator. Then, a layer of stone chips 5 is used for backfilling. Coarse-grained soil is preferred as the fill material for the stone chips 5. The stone chips should be backfilled in layers and should not be dumped. Before compaction, large-particle stones should be evenly distributed in the middle of the fill material. Then, the supporting slope 13 is made by compaction. Then, the foundation bearing capacity test is carried out. If the test is qualified, construction continues. Then, the lower retaining wall 11 is poured, followed by the upper retaining wall 9. When pouring the upper retaining wall 9, the drainage pipes are arranged with an outward slope of 4%. During installation, the drainage pipes are fixed with steel bars. For the drainage pipes in the direction of the wall panel, the drainage pipes should be in close contact with the front formwork, and the end face of the drainage pipes should form a corresponding slope to ensure that there is no leakage of grout around the drainage pipes during the concrete pouring process, so that the panel is smooth and flat. Below the inner side of the drainage pipe, a mortar waterproofing layer 7 is used for waterproofing. Above the mortar waterproofing layer 7, a medium-coarse sand gravel filter layer 8 is used. The drainage hole area is backfilled with approximately one layer of mortar waterproofing layer 7 and two layers of medium-coarse sand gravel filter layer 8, with a backfill width of 30cm. During backfilling, support protrusions 4 are used as bottom supports to prevent settlement. Then, the backfill of the retaining wall is carried out to ensure the quality of the concrete wall. Medium-coarse sand is used for backfilling the backfill, and it is filled and compacted in 30cm layers.

[0021] In Example 2, based on Example 1, a connecting anchor rod 10 is provided inside the connecting boss 19, and the upper end of the connecting anchor rod 10 is cast into the upper retaining wall 9.

[0022] The outer side wall of the connecting anchor 10 is uniformly provided with barbs 20. When the lower retaining wall 11 is poured, the connecting anchor 10 with barbs 20 can be inserted into the top of the lower retaining wall 11, and the lower part of the connecting anchor 10 is poured into the lower retaining wall 11. Then, when the upper retaining wall 9 is poured, the upper part of the connecting anchor 10 is poured into the upper retaining wall 9.

[0023] Sealing grooves are provided at the inner and outer joints of the upper retaining wall 9 and the lower retaining wall 11, and the sealing grooves are filled with a sealing grout layer 17. A wall toe 15 is provided on the outer bottom of the lower retaining wall 11. The sealing grooves are directly sealed with waterproof sealant to form a sealing grout layer 17.

[0024] A limiting protrusion 3 is provided on the top right side of the supporting protrusion 4. A baffle plate 16 is provided on the inner side of the gravel filter layer 8 and the mortar waterproof layer 7. The bottom of the baffle plate 16 extends to the bottom left side of the limiting protrusion 3. When the gravel filter layer 8 and the mortar waterproof layer 7 are backfilled, the baffle plate 16 can be used to block them and prevent them from falling off.

[0025] A pedestrian walkway 12 is provided on the left side of the retaining wall body, and a debris platform 14 is provided between the pedestrian walkway 12 and the retaining wall body.

[0026] The drainage pipe includes a PVC inner pipe 6, which is surrounded by a supporting steel pipe 21. Both ends of the PVC inner pipe 6 are provided with supporting flanges 22 at the ends of the supporting steel pipe 21. The outer walls of the supporting flanges 22 at both ends are flush with the side walls of the upper retaining wall 9. During the installation and fixing of the drainage pipe, epoxy coal tar coating can be applied to the outside of the supporting steel pipe 21 to enhance corrosion protection.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0028] In the description of this utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A retaining wall structure for a high slope, comprising a retaining wall body disposed at the lower part of the slope (2) on both sides of a slope (1), wherein a drainage pipe is provided in the upper part of the retaining wall body, and a gravel filter layer (8) and a mortar waterproofing layer (7) are provided on the inner side of the upper part of the retaining wall body, characterized in that: A replacement stone slag layer (5) is provided in the foundation pit below the retaining wall body. The top inner side of the replacement stone slag layer (5) is provided with a supporting inclined surface (13) that supports the retaining wall body to be inclined and attached to the lower outer side of the slope (2). The retaining wall body includes an upper retaining wall (9) and a lower retaining wall (11). The drainage pipe is set in the upper retaining wall (9). A supporting boss (4) is provided on the upper retaining wall (9) below the lowest mortar waterproof layer (7). A connecting recess (18) is provided in the middle of the bottom of the upper retaining wall (9). A connecting boss (19) that cooperates with the connecting recess (18) is provided in the middle top of the lower retaining wall (11).

2. The high slope retaining wall structure according to claim 1, wherein: The connecting boss (19) is provided with a connecting anchor rod (10), and the upper end of the connecting anchor rod (10) is cast into the upper retaining wall (9).

3. The high slope retaining wall structure according to claim 2, wherein: The outer side wall of the connecting anchor rod (10) is uniformly provided with barbs (20).

4. The high slope retaining wall structure according to claim 2, wherein: A sealing groove is provided at the inner and outer connecting joints of the upper retaining wall (9) and the lower retaining wall (11), and the sealing groove is filled with a sealing grout layer (17).

5. The high slope retaining wall structure according to claim 1, wherein: The top right side of the support boss (4) is provided with a limiting protrusion (3), and the inner side of the sand and gravel filter layer (8) and the mortar waterproof layer (7) is provided with a baffle plate (16), the bottom of the baffle plate (16) extends to the bottom left side of the limiting protrusion (3).

6. The high slope retaining wall structure according to claim 1, wherein: A sidewalk (12) is provided on the left side of the retaining wall body, and a debris platform (14) is provided between the sidewalk (12) and the retaining wall body.

7. The high slope retaining wall structure according to claim 1, wherein: The drainage pipe includes a PVC inner pipe (6), and a supporting steel pipe (21) is fitted on the outside of the PVC inner pipe (6). The two ends of the PVC inner pipe (6) are provided with supporting flanges (22) at the ends of the supporting steel pipe (21). The outer walls of the supporting flanges (22) at both ends are flush with the two side walls of the upper retaining wall (9).

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