Retaining wall drainage system with drainage layer
The retaining wall system with a drainage layer and vertical pipes addresses drainage inefficiencies and construction challenges, enhancing stability and efficiency.
Patent Information
- Application Number
- CN202421615173.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-09
AI Technical Summary
The gravel drainage effect of the existing retaining wall is poor, resulting in untimely discharge of rainwater or groundwater, affecting soil stability, and difficult construction and difficult quality control.
A combined structure of permeable concrete drainage layer and waterproof clay layer is adopted, combined with drainage components and reverse filter geotextile to form an efficient drainage system. The permeable concrete drainage layer is used for rapid drainage, the waterproof clay layer prevents external water from penetration, and the foundation base provides support and prevents leakage.
It improves the stability and drainage efficiency of the retaining wall, reduces construction difficulty, ensures project quality, and prevents the impact of water pressure on the soil.
Smart Images
Figure CN223103702U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of retaining wall drainage, in particular to a retaining wall drainage system with a drainage layer. Background Art
[0002] In the field of highway engineering, a retaining wall is a commonly used structure for fixing soil masses, preventing soil landslides, and ensuring the safety and stability of roads. However, in practical applications, one of the main problems faced by retaining walls is the influence of rainwater or groundwater. These moisture contents can increase the water content of the soil mass, thereby causing an increase in the water pressure inside the soil mass, posing a threat to the stability of the retaining wall.
[0003] The design of existing retaining walls usually arranges crushed stones between the back of the wall and the soil mass to play a drainage role. However, the drainage effect of the crushed stones is average. When there is a large amount of rainwater or groundwater, it is easy to cause untimely drainage, which affects the soil mass. Moreover, because it needs to be rolled and compacted within a very narrow range behind the retaining wall, the construction process is difficult, and the engineering quality control is difficult to be controlled. Even due to the untimely setting of the crushed stone filter layer, the filter layer on the back of the wall is filled with the soil mass behind the wall.
[0004] In view of this, it is necessary to propose a retaining wall drainage system with a drainage layer to solve or at least alleviate the above defects. Summary of the Utility Model
[0005] The main purpose of the utility model is to provide a retaining wall drainage system with a drainage layer to solve the problem that the existing retaining wall using crushed stones for drainage has an average effect and is easy to affect the soil mass.
[0006] To achieve the above purpose, the utility model provides a retaining wall drainage system with a drainage layer, including a foundation base, a drainage structure, a retaining wall body, and a drainage component. The foundation base and the drainage structure are both arranged inside the retaining wall body. Among them,
[0007] The drainage structure includes a permeable concrete drainage layer and a water-proof clay layer. The foundation base is fixed between the retaining wall body and the soil mass and is arranged at the bottom. The permeable concrete drainage layer is arranged on the foundation base, and the water-proof clay layer is laid on the top of the permeable concrete drainage layer.
[0008] The drainage component penetrates through the retaining wall body, and the inner end of the drainage component is communicated with the permeable concrete drainage layer.
[0009] Preferably, the drainage assembly includes a plurality of drain pipes arranged at intervals in the vertical direction. The drain pipes are arranged inside the retaining wall body, and the water absorption end of the drain pipe is communicated with the permeable concrete drainage layer, and the water outlet end of the drain pipe is communicated with the outside of the retaining wall body.
[0010] Preferably, it further includes an anti-filter geotextile, which is connected to the inner side of the foundation base and the drainage structure, and is attached between the foundation base and the soil, and between the drainage structure and the soil.
[0011] Preferably, the water-proof clay layer is arranged in an inclined shape to match the top end of the soil, and the lower end of the water-proof clay layer is connected to the top end of the retaining wall body.
[0012] Preferably, the drain pipe at the bottommost is arranged flush with the bottom end of the permeable concrete drainage layer.
[0013] Preferably, a waterproof agent is sprayed between the inner side of the retaining wall body and the permeable concrete drainage layer.
[0014] Preferably, the thickness of the permeable concrete drainage layer is ≥30 cm.
[0015] Preferably, the drain pipe is arranged to slope downward from the water absorption end to the water drainage end, and the inclination angle between the axis line of the drain pipe and the horizontal line is 8° to 10°.
[0016] Preferably, the foundation base is made of C20 concrete.
[0017] Preferably, the number of the drain pipes is two, and the two drain pipes are arranged at intervals in the vertical direction.
[0018] Compared with the prior art, the present utility model has the following beneficial effects:
[0019] The present utility model provides a retaining wall drainage system with a drainage layer, which includes a foundation base, a drainage structure, a retaining wall body and a drainage component. The foundation base and the drainage structure are both arranged inside the retaining wall body. The drainage structure includes a permeable concrete drainage layer and an impermeable clay layer. The foundation base is fixed between the retaining wall body and the soil mass and is arranged at the bottom. The permeable concrete drainage layer is arranged on the foundation base, and the impermeable clay layer is laid on the top of the permeable concrete drainage layer. The drainage component penetrates through the retaining wall body, and the inner end is communicated with the permeable concrete drainage layer. In this way, the water in the soil mass can be drained more quickly and effectively through the permeable concrete drainage layer, and it is more convenient for construction and has better construction quality compared with using gravel for drainage construction. And the impermeable clay layer can protect the water on the slope surface and prevent water from penetrating into it. At the same time, the foundation base can not only provide a supporting role for the drainage structure, but also effectively prevent water from leaking from the wall foot into the soil mass, improving the stability of the retaining wall. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0021] Figure 1 It is a schematic cross-sectional view of the application scenario of the overall structure in an embodiment of the present utility model.
[0022] The implementation, functional features and advantages of the object of the present utility model will be further described with reference to the embodiments and the drawings.
[0023] Explanation of the reference numerals in the drawings:
[0024] 10. Drainage mechanism; 110. Permeable concrete drainage layer; 120. Impermeable clay layer; 130. Filter geotextile; 20. Drainage component; 210. Drain pipe; 30. Foundation base; 40. Retaining wall body; 50. Soil mass. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.
[0027] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.
[0028] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0029] Please refer to the attached Figure 1 As shown in the figure, a retaining wall drainage system with a drainage layer provided in an embodiment of the present utility model includes a foundation base 30, a drainage structure 10, a retaining wall body 40, and a drainage component 20. Both the foundation base 30 and the drainage structure 10 are provided inside the retaining wall body 40. First of all, it should be noted that different from the existing retaining wall design, which usually sets accumulated gravel between the wall and the soil mass 50 behind the wall to play a drainage role, the drainage effect of the gravel is generally average. When there is a lot of rainwater or groundwater, it is easy to cause untimely drainage and affect the soil mass 50. Moreover, because it needs to be rolled and compacted in a very narrow area behind the retaining wall, the construction process is difficult, and the engineering quality control is difficult to be controlled. Even due to the untimely setting of the gravel filter layer, the filter layer on the back of the wall is filled by the soil mass 50 behind the wall. The present application solves the above defects in the prior art by providing a retaining wall drainage system with a drainage layer. Specifically as follows:
[0030] The drainage structure 10 includes a permeable concrete drainage layer 110 and an impermeable clay layer 120. The foundation base 30 is fixed between the retaining wall body 40 and the soil mass 50 and is arranged at the bottom. The permeable concrete drainage layer 110 is arranged on the foundation base 30, and the impermeable clay layer 120 is laid on the top of the permeable concrete drainage layer 110. The drainage component 20 is arranged through the retaining wall body 40, and the inner end of the drainage component 20 is communicated with the permeable concrete drainage layer 110.
[0031] Specifically, the retaining wall drainage system with a drainage layer in this application includes a foundation base 30, a drainage structure 10, a retaining wall body 40, and a drainage component 20. The foundation base 30 is used to support the entire drainage structure 10 and serves as the bearing stress system of the drainage system. It is fixed between the retaining wall body 40 and the soil mass 50 and is arranged at the bottom. In this way, in addition to support, it can effectively prevent water from leaking from the wall foot into the soil mass 50, thereby improving the stability of the retaining wall body 40. The drainage structure 10 is used to drain the accumulated water in the soil mass 50, timely relieve the water pressure in the soil mass 50, and discharge the water to the outside of the entire structure by combining with the drainage component 20.
[0032] Among them, the drainage structure 10 includes a permeable concrete drainage layer 110 and an impermeable clay layer 120. The permeable concrete drainage layer 110 has a high porosity and good water permeability. It can quickly and effectively drain the water in the soil mass 50 behind the wall and reduce the water pressure inside the soil mass 50. In a preferred embodiment of this application, the permeable concrete drainage layer 110 can adopt a single-sized aggregate with a particle size of 19 mm to 32.5 mm, the cement adopts ordinary Portland cement, the water-cement ratio is 0.3 to 0.4, and an appropriate amount of polypropylene fiber or steel fiber is added as a reinforcing material. After being vibrated and compacted, permeable concrete is formed and cast in situ on the foundation base 30 to form the permeable concrete drainage layer 110, which is connected between the retaining wall body 40 and the soil mass 50. The impermeable clay layer 120 is used to prevent the water on the slope surface from penetrating into the interior from the slope surface. Therefore, it covers the top of the permeable concrete drainage layer 110 to ensure that no external water enters the system additionally, avoiding increasing the drainage pressure. It adopts impermeable clay. After the water in the soil mass 50 permeates through the permeable concrete drainage layer 110, since the inner end of the drainage component 20 is communicated with the permeable concrete drainage layer 110, the water permeated through the permeable concrete drainage layer 110 is then discharged to the outside of the structure through the drainage component 20. It can be understood that the inner end here refers to the end of the drainage component 20 arranged inside the retaining wall body 40 close to the drainage layer.
[0033] As a preferred embodiment of the present utility model, the drainage assembly 20 includes a plurality of drain pipes 210 arranged at intervals in the vertical direction. The drain pipes 210 are arranged in the retaining wall body 40, and the water absorption end of the drain pipe 210 is communicated with the permeable concrete drainage layer 110, and the water outlet end of the drain pipe 210 is communicated with the outside of the retaining wall body 40.
[0034] It should be noted that when constructing the retaining wall body 40, the installation holes for the drain pipes 210 can be pre-buried in advance. After the retaining wall body 40 is formed, the drain pipes 210 are installed, so that the drain pipes 210 are arranged in the retaining wall body 40. Among them, the water absorption ends of the drain pipes 210 need to be communicated with the permeable concrete drainage layer 110 to facilitate the drainage of the infiltrated water, and its water outlet end is communicated with the outside of the retaining wall body 40, so as to drain the water to the outside of the retaining wall body 40, forming a drainage system. The installation and construction of the whole structure are relatively convenient, and the drainage performance is efficient; among them, the drain pipes 210 can be made of PVC pipes, and the pipe diameter can be set to 100 mm to 150 mm.
[0035] As a relatively superior embodiment of the present utility model, it further includes an anti-filter geotextile 130. The anti-filter geotextile 130 is connected to the inside of the foundation base 30 and the drainage structure 10, and is attached between the foundation base 30 and the soil body 50, and between the drainage structure 10 and the soil body 50.
[0036] It should be noted that the anti-filter geotextile 130 is used to prevent the soil particles of the soil body 50 from entering the inside of the permeable concrete drainage layer 110, thereby causing blockage of the permeable concrete drainage layer 110. Therefore, it is arranged between the drainage structure 10 and the soil body 50, and a part of it is arranged between the foundation base 30 and the soil body 50 when laid, so as to ensure the stable installation and firm connection of the overall anti-filter geotextile 130; among them, the anti-filter geotextile 130 can be made of polyester or polypropylene fiber materials, which have sufficient tensile strength and filtration performance.
[0037] As a better embodiment of the present utility model, the water-proof clay layer 120 is arranged in an inclined shape to match the top end of the soil body 50, and the lower end of the water-proof clay layer 120 is connected to the top end of the retaining wall body 40.
[0038] It should be noted that since the top of the soil body 50 usually has a slope, and the water-proof clay layer 120 is arranged at the top of the entire drainage structure 10, in order to match the slope of the soil body 50, the water-proof clay layer 120 is arranged obliquely to match the top end of the soil body 50. Here, the matching arrangement means that the inclination of the water-proof clay layer 120 is consistent with the slope inclination of the soil body 50 in the application scenario, so as to ensure the stability of the structure. The lower end of the water-proof clay layer 120 is connected to the top end of the retaining wall body 40, that is, it is arranged flush with the top end of the retaining wall body 40, so as to completely cover the entire permeable concrete drainage layer 110 and prevent external water from penetrating.
[0039] As a preferred embodiment of the present utility model, the drain pipe 210 located at the bottommost part is arranged flush with the bottom end of the permeable concrete drainage layer 110.
[0040] It should be noted that in this way, it can be ensured that the water in the permeable concrete drainage layer 110 can all be smoothly discharged through the drain pipe 210, and there will be no situation where part of the accumulated water accumulates at the bottom of the drainage layer.
[0041] Furthermore, a waterproof agent is sprayed between the inner side of the retaining wall body 40 and the permeable concrete drainage layer 110.
[0042] It should be noted that the waterproof agent (not shown in the figure) has good waterproof performance to prevent the water in the permeable concrete drainage layer 110 from penetrating into the interior of the retaining wall body 40 and damaging the performance stability of the retaining wall body 40.
[0043] Furthermore, the thickness of the permeable concrete drainage layer 110 ≥ 30 cm.
[0044] It should be understood that in order to ensure good water permeability and seepage performance, the thickness of the permeable concrete drainage layer 110 needs to be not less than 30 cm, and at the same time, to ensure the structural strength and stability of the drainage structure 10.
[0045] Furthermore, the drain pipe 210 is arranged to slope downward from the water absorption end to the drainage end, and the inclination angle between the axis line of the drain pipe 210 and the horizontal line is 8° - 10°.
[0046] It should be noted that arranging the drain pipe 210 to slope downward can improve the drainage efficiency compared with the horizontal arrangement. In a preferred embodiment, the inclination angle between the axis line of the drain pipe 210 and the horizontal line is 8° - 10°, and those skilled in the art can set it according to actual needs.
[0047] Furthermore, the foundation base 30 is made of C20 concrete.
[0048] It should be noted that the base base 30 can be formed by in-situ casting. By casting concrete, the structural strength and sufficient support performance can be ensured. The concrete used is C20 concrete, which can save construction costs while ensuring the structural strength.
[0049] Furthermore, the number of the drain pipes 210 is two, and the two drain pipes 210 are arranged at intervals in the vertical direction.
[0050] It can be understood that the number of the drain pipes 210 can be determined according to the actual drainage effect and the height of the permeable concrete drainage layer 110. In a preferred embodiment, the number of the drain pipes 210 is two, and the distance between the two drain pipes 210 can be set to 2m - 3m, and those skilled in the art can choose according to the specific situation.
[0051] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.
Claims
1. A retaining wall drainage system with a drainage layer, characterized in that, It includes a basic base, a drainage structure, a retaining wall body and a drainage component. The basic base and the drainage structure are both arranged inside the retaining wall body. Among them, the drainage structure includes a permeable concrete drainage layer and an impermeable clay layer. The basic base is fixed between the retaining wall body and the soil and is arranged at the bottom. The permeable concrete drainage layer is arranged on the basic base, and the impermeable clay layer is laid on the top of the permeable concrete drainage layer; the drainage component is arranged through the retaining wall body, and the inner end of the drainage component is communicated with the permeable concrete drainage layer.
2. The retaining wall drainage system with a drainage layer according to claim 1, characterized in that, The drainage component includes a plurality of drain pipes arranged at intervals vertically. The drain pipes are arranged inside the retaining wall body. The water absorption end of the drain pipe is communicated with the permeable concrete drainage layer, and the water outlet end of the drain pipe is communicated with the outside of the retaining wall body.
3. The retaining wall drainage system with a drainage layer according to claim 1, characterized in that, It also includes an anti-filter geotextile, which is connected to the inside of the basic base and the drainage structure and is attached between the basic base and the soil, and between the drainage structure and the soil.
4. The retaining wall drainage system with a drainage layer according to claim 1, characterized in that The impermeable clay layer is arranged in an inclined shape to match the top end of the soil, and the lower end of the impermeable clay layer is connected to the top end of the retaining wall body.
5. The retaining wall drainage system with a drainage layer according to claim 2, characterized in that, The drain pipe at the bottommost is arranged flush with the bottom end of the permeable concrete drainage layer.
6. The retaining wall drainage system with a drainage layer according to claim 1, characterized in that, A waterproof agent is sprayed between the inner side of the retaining wall body and the permeable concrete drainage layer.
7. The retaining wall drainage system with a drainage layer according to claim 1, characterized in that, The thickness of the permeable concrete drainage layer ≥ 30 cm.
8. The retaining wall drainage system with a drainage layer according to claim 7, characterized in that, The drain pipe is arranged to incline downward from the water absorption end to the drainage end, and the inclination angle between the axis line of the drain pipe and the horizontal line is 8° - 10°.
9. The retaining wall drainage system with a drainage layer according to claim 2, characterized in that, The basic base is made of C20 concrete.
10. The retaining wall drainage system with a drainage layer according to claim 8, characterized in that, The number of the drain pipes is two, and the two drain pipes are arranged at intervals vertically.