Guiding type drainage retaining wall structure
The design of the directional drainage structure solves the problems of low efficiency and blockage in the retaining wall drainage system, achieving efficient drainage and retaining wall safety, and improving construction efficiency and applicability.
Patent Information
- Application Number
- CN202422751691.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-11-11
AI Technical Summary
The existing drainage system of retaining walls is inefficient, especially during the rainy season when the water volume is too large, which can easily cause blockages and lead to instability and damage to the retaining walls.
The system adopts a directional drainage structure, including a layer of expanded clay, a collection well, a collection pipe, a drain pipe, and a drainage pipe. By directionally setting and connecting the various pipes, it ensures timely diversion of water flow, avoids blockage, and utilizes the compressive strength of the expanded clay to protect the pipes.
It enables timely relief of water pressure during the high-water season, prevents slope soaking, ensures the safety of retaining walls, reduces the risk of pipeline damage, and improves construction efficiency and applicability.
Smart Images
Figure CN223548604U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of retaining wall technology, and in particular to a retaining wall structure with directional drainage. Background Technology
[0002] A retaining wall is a structure used to support steep slopes and maintain soil stability. It is widely used in civil engineering projects in highways, railways, water conservancy, mining, shipping, and construction. The loads it bears are mainly lateral earth pressure and water pressure behind the wall. Poor drainage within the slope behind the retaining wall generally increases the water content of the soil and foundation soil, increasing the soil's water density and reducing the shear strength of the soil and foundation surface, as well as the foundation's compressive bearing capacity. Furthermore, the increased water content generates additional hydrostatic pressure, soil expansion, and frost heave pressure, thus altering the active earth pressure on the back of the wall. With prolonged soaking, the probability of landslide instability in the soil and rock mass behind the retaining wall increases significantly.
[0003] Existing drainage systems for retaining walls typically involve drainage ditches or pipes. However, these systems are inefficient, especially during periods of high water volume when water flow is excessive. In such cases, water cannot be discharged promptly, and the pipes are prone to blockage, leading to system failure and ultimately causing the retaining wall to become unstable and damaged. Utility Model Content
[0004] The purpose of this utility model is to solve the problems in the prior art by proposing a guide-type drainage retaining wall structure that can relieve water pressure in a timely manner, has a large drainage flow, and prevents blockage.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A directional drainage retaining wall structure for draining soil and rock layers behind the retaining wall, comprising:
[0007] The expanded clay layer is set between the retaining wall and the soil and rock layer, and a water collection well is provided on the soil and rock layer;
[0008] Two drainage components are vertically spaced inside the ceramsite layer. Each drainage component includes a water collection pipe, multiple drainage pipes, and multiple drain pipes. The water collection pipe is horizontally arranged inside the ceramsite layer along the length of the retaining wall. Each drainage pipe is spaced along the length of the water collection pipe, with one end of each drainage pipe connected to one side of the water collection pipe and the other end passing through the retaining wall and extending to the outside of the retaining wall. Each drain pipe is spaced along the length of the water collection pipe, with one end of each drainage pipe connected to the other side of the water collection pipe and the other end connected to the water collection well.
[0009] And a connecting pipe, which is installed between the two water collection pipes to connect the two water collection pipes.
[0010] Furthermore, at least two connecting pipes are provided, and each connecting pipe is spaced apart along the length of the water collection pipe. The bottom of the water collection pipe is provided with filter holes at intervals, and the filter holes are located at the connection between the water collection pipe and the connecting pipe.
[0011] Furthermore, each drainage component also includes a plain concrete cushion layer, which is set at the bottom of the water collection pipe. A medium sand filter layer is provided at the top of the water collection pipe at the bottom, and a pebble filter layer is provided at the top of the water collection pipe at the top.
[0012] Furthermore, non-woven geotextiles are installed at the bottom and top of the medium sand filter layer and at the bottom and top of the pebble filter layer.
[0013] Furthermore, one end of the drain pipe extends through the retaining wall and slopes downwards.
[0014] Furthermore, one end of the drainage pipe penetrates into the soil layer and is inclined upwards.
[0015] Furthermore, the end of the drainage pipe that penetrates the soil layer is equipped with a filter pad and a filter screen from the inside out. The filter pad has filter holes, and the filter screen is a metal filter screen.
[0016] Furthermore, the top of the ceramsite layer is covered with gravel.
[0017] Furthermore, an impermeable soil layer is provided behind the retaining wall, which is located at the bottom of the ceramsite layer.
[0018] Furthermore, a roadbed is provided on one side of the retaining wall, and an open ditch is provided on the side of the retaining wall where the roadbed is close to.
[0019] The beneficial effects of this utility model are as follows:
[0020] In this utility model, the retaining wall structure with directional drainage has water inlets for drainage pipes with different requirements installed at different water levels, and each pipe is directionally buried and interconnected. This ensures that water in the slope behind the retaining wall can flow into the drainage pipes in a directional manner. During the high water season, when the water volume is large, the water volume can be diverted in time through the horizontal water collection pipe and the vertical connecting pipe, which can relieve the water pressure behind the retaining wall in time, prevent the slope from being soaked by water seepage, and ensure the safety of the retaining wall. At the same time, each drainage channel can also operate independently to avoid damage or blockage of a certain pipe, which would affect the overall drainage function.
[0021] The installed ceramsite can absorb seepage water in the soil and rock mass, and ceramsite has excellent compressive strength. When the soil and rock mass behind the retaining wall exerts pressure on the retaining wall, the compressive strength of the ceramsite and the pores between the ceramsite can be used to relieve the pressure, ensuring the safety of the retaining wall. In addition, the installed ceramsite can wrap and protect each drainage pipe, greatly reducing the damage to the pipes.
[0022] Furthermore, each pipeline can be prefabricated in the factory and transported to the site for assembly. The construction process is simple, which greatly improves construction efficiency, saves construction time, has a wide range of applications, and has significant social and economic benefits. Attached Figure Description
[0023] Figure 1 This is a cross-sectional structural diagram of a retaining wall structure for directional drainage proposed in this utility model.
[0024] Figure 2 This is a cross-sectional structural diagram of the drainage pipe, water collection pipe, and water discharge pipe of a retaining wall structure for directional drainage proposed in this utility model.
[0025] In the diagram: 1 Retaining wall, 2 Drainage hole, 3 Drainage pipe, 4 Roadbed, 5 Medium sand filter layer, 6 Plain concrete cushion layer, 7 Non-woven geotextile, 8 Gravel filter layer, 9 Water collection pipe, 10 Drainage hole, 11 Ceramsite layer, 12 Crushed stone, 13 Open ditch, 14 Soil and rock layer, 15 Filter screen, 16 Filter pad, 17 Impermeable soil, 18 Filter hole. Detailed Implementation
[0026] The technical solution of this patent will be further described in detail below with reference to specific embodiments.
[0027] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.
[0028] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.
[0029] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.
[0030] Reference Figure 1-2A directional drainage retaining wall structure is used for drainage of retaining walls to facilitate rapid drainage and increase the drainage capacity of the retaining wall.
[0031] The retaining wall structure for the guided drainage includes an expanded clay layer 11, two drainage components, and a connecting pipe 10;
[0032] A soil and rock layer 14 is set behind the retaining wall 1, and a water collection well is set on the soil and rock layer 14. An impermeable soil layer 17 is set behind the retaining wall 1. A 20cm-30cm thick ceramsite layer 11 with impact resistance and water filtration is set between the retaining wall 1 and the soil and rock layer 14. The ceramsite layer 11 is located on top of the impermeable soil layer 17. The top of the ceramsite layer 11 is provided with compacted gravel 12, and an open ditch is provided on top of the gravel 12.
[0033] Two drainage components are vertically spaced inside the ceramsite layer 11, located at 1 / 3 and 2 / 3 of the wall height of the retaining wall 1, respectively. Each drainage component includes a 300mm diameter water collection pipe 9 and a C20 plain concrete cushion layer 6. The water collection pipe 9 is horizontally arranged inside the ceramsite layer 11 along the length of the retaining wall 1, and the plain concrete cushion layer 6 is located at the bottom of the water collection pipe 9.
[0034] Each drainage component also includes multiple 100mm diameter drain pipes 2 and multiple 200mm diameter drain pipes 3. Each drain pipe 2 is spaced apart along the length of the collection pipe 9, and one end of each drain pipe 2 is connected to one side of the collection pipe 9, and the other end passes through the retaining wall 1 and extends to the outside of the retaining wall 1. One end of the drain pipe 2 extends out of the retaining wall 1 and is inclined downward with an external slope of 5%. Each drain pipe 3 is spaced apart along the length of the collection pipe 9, and one end of each drain pipe 2 is connected to the other side of the collection pipe 9. The other end of each drain pipe 2 enters the soil layer 14, is inclined upward, and is connected to the collection well of the soil layer 14.
[0035] The end of the drainage pipe 3 that penetrates into the soil layer 14 is provided with a filter pad 16 and a filter screen 15 from the inside to the outside. The filter pad 16 has filter holes, and the filter screen 15 is a rust-proof metal filter screen. The filter pad 16 is located 2cm-3cm inside the filter screen 15.
[0036] The top of the water collection pipe 9 at the bottom is provided with a medium sand filter layer 5, which is filled with fine sand. The bottom and top of the medium sand filter layer 5 are provided with non-woven geotextile 7, which wraps the fine sand.
[0037] The top of the water collection pipe 9 is equipped with a pebble filter layer 8, which is filled with pebbles with a particle size of 20mm-50mm. The bottom and top of the pebble filter layer 8 are both covered with non-woven geotextile 7.
[0038] At least two connecting pipes 10 are provided, and each connecting pipe 10 is spaced apart along the length of the water collection pipe 9. The connecting pipe 10 is located between two water collection pipes 9 to connect the upper and lower water collection pipes 9. The bottom of the upper water collection pipe 9 is provided with filter holes 18 at intervals. The filter holes 18 are located at the connection between the water collection pipe 9 and the connecting pipe 10, so as to filter the accumulated water and avoid clogging.
[0039] A roadbed 4 is provided on one side of the retaining wall 1, and an open ditch 13 is provided on the side of the retaining wall 1 close to the roadbed 4. The accumulated water discharged through the drainage pipe 2 falls into the open ditch 13 for discharge.
[0040] The working principle of this guided drainage retaining wall structure is as follows: Accumulated water enters through one end of each drainage pipe 3, flows along the inclined drainage pipe 3 into the collection pipe 9. When the accumulated water enters the drainage pipe 3, it first passes through the filter screen 15 and filter pad 16 to prevent foreign objects from entering the drainage structure of the retaining wall 1. After filtration, the accumulated water enters the collection pipe 9 and is then discharged through the inclined drain pipe 2 on one side of the collection pipe 9. The accumulated water discharged through the drain pipe 2 falls into the open ditch 13 for discharge. When the water volume is large, since the upper and lower collection pipes 9 are connected by the connecting pipe 10, it is ensured that during the high water season, when the water volume is large, the water volume can be diverted in time through the horizontally connected collection pipe 9 and the vertical connecting pipe 10, which can relieve the water pressure behind the retaining wall 1 in time, prevent the slope from being soaked by water seepage, and ensure the safety of the retaining wall 1.
[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A guide-drainage retaining wall structure for draining the soil and rock layer (14) behind the retaining wall (1), characterized in that, include: A ceramsite layer (11) is set between the retaining wall (1) and the soil and rock layer (14), and a water collection well is provided on the soil and rock layer (14); Two drainage components are vertically spaced inside the ceramsite layer (11). Each drainage component includes a water collection pipe (9), multiple drainage pipes (2) and multiple drainage pipes (3). The water collection pipe (9) is horizontally arranged inside the ceramsite layer (11) along the length of the retaining wall (1). Each drainage pipe (2) is spaced along the length of the water collection pipe (9), and one end of each drainage pipe (2) is connected to one side of the water collection pipe (9), and the other end passes through the retaining wall (1) and extends to the outside of the retaining wall (1). Each drainage pipe (3) is spaced along the length of the water collection pipe (9), and one end of each drainage pipe (2) is connected to the other side of the water collection pipe (9), and the other end is connected to the water collection well. And a connecting pipe (10) is provided between the two water collection pipes (9) to connect the two water collection pipes (9).
2. The retaining wall structure for directional drainage according to claim 1, characterized in that: At least two connecting pipes (10) are provided, and each connecting pipe (10) is spaced apart along the length of the water collection pipe (9). The bottom of the water collection pipe (9) is provided with filter holes (18) spaced apart, and the filter holes (18) are located at the connection between the water collection pipe (9) and the connecting pipe (10).
3. The retaining wall structure for directional drainage according to claim 1, characterized in that: Each of the drainage components further includes a plain concrete cushion layer (6), which is disposed at the bottom of the water collection pipe (9). The top of the water collection pipe (9) at the bottom is provided with a medium sand filter layer (5), and the top of the water collection pipe (9) at the top is provided with a pebble filter layer (8).
4. The retaining wall structure for directional drainage according to claim 3, characterized in that: Non-woven geotextile (7) is provided at the bottom and top of the medium sand filter layer (5) and at the bottom and top of the pebble filter layer (8).
5. The retaining wall structure for directional drainage according to claim 1, characterized in that: One end of the drain pipe (2) extends out of the retaining wall (1) and is inclined downwards.
6. The retaining wall structure for directional drainage according to claim 1, characterized in that: One end of the drainage pipe (3) penetrates the soil layer (14) and is inclined upwards.
7. A retaining wall structure for directional drainage according to claim 6, characterized in that: The drain pipe (3) has a filter pad (16) and a filter screen (15) arranged sequentially from the inside to the outside at one end of the rock and soil layer (14). The filter pad (16) has filter holes, and the filter screen (15) is a metal filter screen.
8. A retaining wall structure for directional drainage according to claim 1, characterized in that: The top of the ceramsite layer (11) is provided with gravel (12).
9. A retaining wall structure for directional drainage according to claim 1, characterized in that: The retaining wall (1) is provided with an impermeable soil layer (17) behind it, and the impermeable soil layer (17) is located at the bottom of the ceramsite layer (11).
10. A retaining wall structure for directional drainage according to claim 1, characterized in that: A roadbed (4) is provided on one side of the retaining wall (1), and an open ditch (13) is provided on the side of the roadbed (4) close to the retaining wall (1).