Retaining wall drainage structure and matched device
By using a combination of detachable anti-filtration device, clay water barrier, gravel and medium-coarse sand in the retaining wall drainage system, the problem of easy blockage of the drainage system in the prior art is solved, effective drainage filtration and soil layer stability are achieved, maintenance costs are reduced and aesthetics are maintained.
Patent Information
- Application Number
- CN202420954401.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The drainage system of existing retaining walls is prone to failure due to blockage of the filter layer or drainage hole, resulting in increased water and soil pressure, which may cause the retaining wall to slide or overturn, and the maintenance cost is high and the aesthetics are affected.
A retaining wall drainage structure and supporting device including a detachable anti-filtration device, a clay water barrier, gravel and medium-coarse sand are designed. Fine materials are filtered through the anti-filtration device, and the medium-coarse sand and gravel are initially filtered, and rainwater is collected using the clay water barrier to reduce the loss of soil fine materials.
It effectively avoids the blockage of drainage pipes, ensures the bearing capacity of the soil layer behind the retaining wall, reduces maintenance costs, and extends the service time of the filter back device, maintaining the beauty of the retaining wall.
Smart Images
Figure CN222666865U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of retaining wall drainage construction, in particular to a retaining wall drainage structure and a matching device. Background Art
[0002] As a common retaining structure, retaining wall is widely used in water conservancy, transportation, port and civil engineering construction. It can ensure the stability of backfill and slope soil behind the wall and effectively prevent the deformation and instability of soil. After each rainfall infiltration, the retaining wall is inevitably affected by the water and soil pressure behind the wall, so it is very important to do a good job of drainage behind the retaining wall.
[0003] The drainage behind the existing retaining wall is mainly achieved by setting a filter layer behind the wall and a drainage hole inside the wall. However, once the filter layer or the drainage hole is blocked, the drainage system of the retaining wall will suffer a huge impact. After the drainage hole fails, the water and soil pressure behind the wall will increase, which may easily cause the retaining wall to slip or overturn and thus affect the stability of the soil. In addition, the maintenance of the blocked filter layer and the drainage hole is usually quite troublesome, and the cost of subsequent maintenance investment is relatively high. Moreover, during the use of the traditional retaining wall drainage hole, it is easy to form stains on the front wall surface of the retaining wall, thereby affecting the appearance of the retaining wall and may even cause damage to the front wall surface of the retaining wall. In summary, there is still room for improvement in the existing retaining wall drainage technical measures. Utility Model Content
[0004] In view of the above-mentioned defects in the prior art, a retaining wall drainage structure and supporting devices are provided to avoid the weakening of the drainage effect due to blockage of the drainage pipe.
[0005] The technical solution adopted by the utility model to solve the above technical problems is:
[0006] A retaining wall drainage structure and supporting devices, including a retaining wall and a drainage pipe, wherein the drainage pipe is buried in the retaining wall; the characteristics include: it also includes a detachable anti-filtration device arranged at the inlet of the drainage pipe, and a clay water-proof layer, crushed stone and medium-coarse sand arranged at the rear side of the retaining wall; the clay water-proof layer is located in the area below the lowest water inlet of the drainage pipe, the crushed stone and medium-coarse sand are arranged above the clay water-proof layer, and the medium-coarse sand is located between the crushed stone and the retaining wall.
[0007] According to the above technical solution, an external thread is provided on the outer surface of the filter device, and an internal thread matching the external thread is provided at the inner end of the drainage pipe located on the retaining wall; the filter device is connected to the inner end of the drainage pipe located on the retaining wall through threads.
[0008] According to the above technical scheme, the anti-filtration device includes an inner drainage pipe with an external thread, an aggregate container placed in the inner drainage pipe, and a filler filled in the aggregate container; the inner drainage pipe adopts a cylindrical structure, a first permeable net is fixed at the bottom of the cylindrical structure, and a handle is provided at the outer end of the inner drainage pipe.
[0009] According to the above technical solution, the anti-filtration device also includes a permeable component arranged at the outer end of the inner drainage pipe, the permeable component is composed of a permeable geotextile on the outside and a detachable second permeable net on the inside, the permeable geotextile is fixed on the outer surface of the second permeable net, and both cover the inner drainage pipe; the permeable component is installed on the outer end of the inner drainage pipe in a detachable connection manner.
[0010] According to the above technical solution, a cleaning brush is provided between the detachable permeable net and the permeable geotextile. The bristles of the cleaning brush swing with the flow rate of rainwater to complete the preliminary cleaning of the permeable geotextile.
[0011] According to the above technical solution, the aggregate container is configured to have multiple sections, and both ends of each section of the aggregate container are provided with end permeable nets; fillers of different particle sizes are filled in aggregate containers of different sections, and the particle size of the fillers in the aggregate container decreases in sequence along the water flow direction.
[0012] According to the above technical solution, the aggregate container is set to three sections, and the fillers include coarse-grained aggregates with a particle size of 13mm to 16mm, medium-grained aggregates with a particle size of 7mm to 10mm, and fine-grained aggregates with a particle size of 2mm to 4mm along the water flow direction.
[0013] According to the above technical scheme, several drainage pipes are arranged at intervals along the length direction of the retaining wall, and the interval range of the drainage pipes is 2m to 5m; the upper surface of the clay waterproof layer is in contact with the lower surface of the lowest water inlet pipe, and the compacted thickness of the clay waterproof layer is not less than 300mm.
[0014] According to the above technical scheme, a single drainage pipe includes an inclined water outlet pipe, a vertically arranged water supply pipe, and several inclined water inlet pipes, and the ends of the water outlet pipe and the water inlet pipe close to the inner side of the retaining wall are higher than the ends close to the outer side of the retaining wall; the several inclined water inlet pipes are arranged at intervals on the same vertical plane, and the ends of the water inlet pipes close to the outside of the retaining wall are connected to the drain pipe; the bottom end of the drain pipe is connected to the end of the water outlet pipe close to the inner side of the retaining wall.
[0015] According to the above technical scheme, several drainage pipes are arranged at equal intervals in the length direction of the retaining wall; in the same drainage pipe, the inlet pipes are arranged vertically at equal intervals, with an interval range of 1.5m to 3m; the slope range of the inlet pipe and the outlet pipe is 3% to 7%.
[0016] The utility model has the following beneficial effects:
[0017] 1. By setting a filter device in the drain pipe, the fine materials carried out by the water behind the retaining wall can be effectively filtered to avoid the blockage of the drain pipe by the fine materials carried by rainwater. Secondly, medium-coarse sand and gravel are set in sequence behind the water inlet of the drain pipe, which can effectively filter the rainwater behind the retaining wall and filter the rainwater preliminarily, effectively avoid the loss of fine materials in the rear soil, and effectively ensure the bearing capacity of the soil layer behind the wall. Then, a clay waterproof layer is set in the area below the lowest water inlet of the drain pipe to achieve the convergence of rainwater behind the retaining wall, which is helpful for the discharge of water in the soil. Finally, since the filter device has a detachable function, the filter device can be replaced by excavating the medium-coarse sand and gravel, thereby effectively avoiding the weakening of the drainage effect of the drain pipe due to blockage; and the detachable setting of the medium-coarse sand and gravel + filter device is more convenient for dredging and maintenance of the drain pipe than the existing technology, which can significantly reduce the later maintenance cost of the retaining wall drainage system.
[0018] 2. A handle is provided at the outer end of the inner drainage pipe, which provides a fulcrum for the early installation and later disassembly and maintenance of the filter device, and facilitates the disassembly of the filter device. Finally, the permeable component provided at the outer end of the inner drainage pipe blocks the medium and coarse sand, preventing a large amount of medium and coarse sand from entering the filter device and accelerating the clogging of the filter device.
[0019] 3. A cleaning brush is provided between the detachable permeable net and the permeable geotextile. The bristles of the cleaning brush swing with the flow rate of rainwater to complete the preliminary cleaning of the permeable geotextile, thus extending the service life of the anti-filtration device. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of an embodiment provided by the utility model;
[0021] Figure 2 It is a structural schematic diagram of the reverse filtration device provided in the embodiment of the utility model;
[0022] In the figure, 1. retaining wall; 2. drainage pipe; 2-1. outlet pipe; 2-2. water pipe; 2-3. inlet pipe; 3. filter device; 3-1. inner drainage pipe; 3-11. first permeable net; 3-12. handle; 3-2. aggregate container; 3-3. filler; 3-4. permeable assembly; 3-41. permeable geotextile; 3-42. second permeable net; 3-43. cleaning brush; 4. clay water-proof layer; 5. gravel; 6. medium-coarse sand. DETAILED DESCRIPTION
[0023] The utility model is described in detail below with reference to the accompanying drawings and embodiments.
[0024] Reference Figure 1-2 As shown, the retaining wall drainage structure and supporting device provided by the utility model.
[0025] Example 1
[0026] The invention comprises a retaining wall 1 and a drainage pipe 2, wherein the drainage pipe is buried in the retaining wall; a detachable filter device 3 is arranged at the inlet of the drainage pipe, and a clay water-proof layer 4, crushed stone 5 and medium-coarse sand 6 are arranged at the rear side of the retaining wall; the clay water-proof layer is located in the area below the lowest water inlet of the drainage pipe, the crushed stone and medium-coarse sand are arranged above the clay water-proof layer, and the medium-coarse sand is located between the crushed stone and the retaining wall.
[0027] In this embodiment, by setting a filter device in the drain pipe, the fine materials carried out by the water behind the retaining wall can be effectively filtered, and the fine materials carried by the rainwater can be prevented from clogging the drain pipe. Secondly, medium-coarse sand and gravel are arranged in sequence behind the water inlet of the drain pipe, which can effectively filter the rainwater behind the retaining wall, filter the rainwater preliminarily, effectively prevent the loss of fine materials in the rear soil body, and effectively ensure the bearing capacity of the soil layer behind the wall. Then, a clay waterproof layer is arranged in the area below the lowest water inlet of the drain pipe to achieve the convergence of rainwater behind the retaining wall, which is helpful for the discharge of water in the soil body. Finally, since the filter device has a detachable function, the filter device can be replaced by excavating the medium-coarse sand and gravel, thereby effectively avoiding the weakening of the drainage effect of the drain pipe due to blockage; and the detachable setting of the medium-coarse sand and gravel + filter device is more convenient for dredging and maintaining the drain pipe than the prior art, which can significantly reduce the later maintenance cost of the retaining wall drainage system.
[0028] Example 2
[0029] The structure and principle of Example 2 are similar to those of Example 1, except that: a connection form between the filter device and the drain pipe is provided, an external thread is provided on the outer surface of the filter device, and an internal thread matching the external thread is provided at the end of the drain pipe located on the inner side of the retaining wall; the filter device is connected to the end of the drain pipe located on the inner side of the retaining wall through threads. Other connection methods, such as snap-on connection, may be used instead of threaded connection, as long as the filter device can be fixedly installed in the drain pipe.
[0030] Example 3
[0031] The structure and principle of Example 3 are similar to those of Example 2, except that the reverse filtration device includes an inner drainage pipe 3-1 with external threads, an aggregate container 3-2 placed in the inner drainage pipe, and a filler 3-3 filled in the aggregate container; the inner drainage pipe adopts a cylindrical structure, a first permeable net 3-11 is fixedly provided at the bottom of the cylindrical structure, and a handle 3-12 is provided at the outer end of the inner drainage pipe. After the inner drainage pipe and the drainage pipe are connected, the handle is clamped at the water inlet of the drainage pipe, which strengthens the firmness of the reverse filtration device and facilitates installation and disassembly. The mesh size of the first permeable net is smaller than the minimum particle size of the corresponding filler.
[0032] In this embodiment, the first permeable net inside the inner drainage pipe supports the bottom of the aggregate container to prevent the aggregate container from sliding from the inner drainage pipe to the deep part of the drainage pipe. Secondly, a handle is provided at the outer end of the inner drainage pipe, which provides a fulcrum for the early installation and later disassembly and maintenance of the filter device, facilitating the disassembly of the filter device. Finally, the permeable component provided at the outer end of the inner drainage pipe blocks the medium and coarse sand to prevent a large amount of medium and coarse sand from entering the filter device and accelerating the clogging of the filter device.
[0033] Example 4
[0034] The structure and principle of Example 4 are similar to those of Example 3, except that: preferably, the anti-filtration device also includes a permeable component 3-4 arranged at the outer end of the drainage inner pipe, the permeable component is composed of an outer permeable geotextile 3-41 and an inner detachable second permeable net 3-42, the permeable geotextile is fixed on the outer surface of the second permeable net, and both cover the drainage inner pipe; the permeable component is installed on the outer end of the drainage inner pipe in a detachable connection manner.
[0035] A cleaning brush 3-43 is also provided between the detachable permeable net and the permeable geotextile. The bristles of the cleaning brush swing with the flow rate of rainwater to complete the preliminary cleaning of the permeable geotextile, thereby extending the service life of the anti-filtration device.
[0036] In embodiments 3 and 4, the aggregate container is configured to have multiple sections, and both ends of each section of the aggregate container are provided with end permeable nets; fillers of different particle sizes are filled in aggregate containers of different sections, and the particle sizes of the fillers in the aggregate container decrease in sequence along the water flow direction. Aggregates of different particle sizes are placed in different aggregate containers, and the aggregate containers are sequentially sleeved through annular grooves and then placed in the drainage inner pipe. The aggregate containers can be disassembled when the aggregates are repaired or replaced.
[0037] In the embodiment in this figure, the aggregate container is set to three sections, and the filler includes coarse-grained aggregate with a particle size of 13mm to 16mm, medium-grained aggregate with a particle size of 7mm to 10mm, and fine-grained aggregate with a particle size of 2mm to 4mm along the water flow direction.
[0038] In Examples 1-4, a plurality of drainage pipes are arranged at intervals along the length direction of the retaining wall, and the interval range of the drainage pipes is 2m to 5m.
[0039] A single drainage pipe includes an inclined outlet pipe 2-1, a vertically arranged water delivery pipe 2-2, and a plurality of inclined inlet pipes 2-3, wherein the ends of the outlet pipe and the inlet pipe close to the inner side of the retaining wall are higher than the ends close to the outer side of the retaining wall; the plurality of inclined inlet pipes are arranged at intervals on the same vertical plane, and the ends of the inlet pipes close to the outer side of the retaining wall are connected to the drain pipe; the bottom end of the drain pipe is connected to the end of the outlet pipe close to the inner side of the retaining wall. The arrangement of the outlet pipe helps to prevent the front wall of the retaining wall from being stained by rainwater, thereby ensuring the beauty of the retaining wall and protecting the front wall of the retaining wall.
[0040] Preferably, several drainage pipes are arranged at equal intervals in the length direction of the retaining wall; in the same drainage pipe, the water inlet pipes are arranged at equal intervals vertically, with an interval range of 1.5m to 3m; the slope of the water inlet pipe and the water outlet pipe ranges from 3% to 7%. In the embodiment shown in the figure, the horizontal interval range of the drainage pipes is 3m, the vertical interval range of the water inlet pipes is 2m, the diameter of the water inlet pipe and the vertical water pipe is 120mm, the diameter of the water outlet pipe is 180mm, and the slope of the water inlet pipe and the water outlet pipe is 5%.
[0041] In Example 1, the upper surface of the clay waterproof layer is in contact with the lower surface of the lowest water inlet pipe, and the compacted thickness of the clay waterproof layer is not less than 300 mm.
[0042] Principle of the utility model:
[0043] First, the drainage pipe needs to be pre-buried in the drainage hole of the retaining wall; the aggregates of corresponding particle size are loaded into the corresponding aggregate containers, and then the aggregate containers are sequentially connected and placed in the drainage inner pipe; after the construction of the retaining wall is completed, the drainage inner pipe is connected to the water inlet pipe through threads and fixed to form a reverse filtration device.
[0044] Furthermore, when the anti-filtration device is blocked over a large area, the medium-coarse sand and gravel are excavated, the inner drainage pipe is removed, and the aggregate container in the inner pipe is taken out. The aggregate in the aggregate container is then cleaned or replaced, re-inserted and placed in the inner drainage pipe, and then connected to the water inlet pipe and fixed.
[0045] The above are only preferred embodiments of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of patent application of the present invention still fall within the protection scope of the present invention.
Claims
1. A retaining wall drainage structure and supporting devices, comprising a retaining wall and a drainage pipe, wherein the drainage pipe is buried in the retaining wall; the characteristics are: It also includes a detachable anti-filtration device arranged at the inlet of the drainage pipe, and a clay water-proof layer, crushed stone and medium-coarse sand arranged at the rear side of the retaining wall; the clay water-proof layer is located in the area below the lowest water inlet of the drainage pipe, the crushed stone and medium-coarse sand are arranged above the clay water-proof layer, and the medium-coarse sand is located between the crushed stone and the retaining wall.
2. The retaining wall drainage structure and supporting device according to claim 1, characterized in that: The outer surface of the filter device is provided with external threads, and the inner end of the drainage pipe located on the retaining wall is provided with internal threads matching the external threads; the filter device is connected to the inner end of the drainage pipe located on the retaining wall through threads.
3. The retaining wall drainage structure and supporting device according to claim 1, characterized in that: The reverse filtration device includes an inner drainage pipe with external threads, an aggregate container placed in the inner drainage pipe, and fillers filled in the aggregate container; the inner drainage pipe adopts a cylindrical structure, a first permeable net is fixedly provided at the bottom of the cylindrical structure, and a handle is provided at the outer end of the inner drainage pipe.
4. The retaining wall drainage structure and supporting device according to claim 3, characterized in that: The anti-filtration device also includes a permeable component arranged at the outer end of the drainage inner pipe. The permeable component is composed of a permeable geotextile on the outer side and a detachable second permeable net on the inner side. The permeable geotextile is fixed on the outer surface of the second permeable net, and both cover the drainage inner pipe. The permeable component is installed on the outer end of the drainage inner pipe in a detachable connection manner.
5. The retaining wall drainage structure and supporting device according to claim 4, characterized in that: A cleaning brush is also provided between the detachable permeable net and the permeable geotextile. The bristles of the cleaning brush swing with the flow rate of rainwater to complete the preliminary cleaning of the permeable geotextile.
6. The retaining wall drainage structure and supporting device according to any one of claims 3 to 5, characterized in that: The aggregate container is configured to have multiple sections, and both ends of each section of the aggregate container are provided with end permeable nets; fillers of different particle sizes are filled in aggregate containers of different sections, and the particle sizes of the fillers in the aggregate containers decrease in sequence along the water flow direction.
7. The retaining wall drainage structure and supporting device according to claim 6, characterized in that: The aggregate container is arranged in three sections, and the fillers include coarse-grained aggregates with a particle size of 13 mm to 16 mm, medium-grained aggregates with a particle size of 7 mm to 10 mm, and fine-grained aggregates with a particle size of 2 mm to 4 mm in sequence along the water flow direction.
8. The retaining wall drainage structure and supporting device according to claim 1, characterized in that: Several drainage pipes are arranged at intervals along the length of the retaining wall, with the interval range of 2m to 5m; the upper surface of the clay waterproof layer is in contact with the lower surface of the lowest water inlet pipe, and the compacted thickness of the clay waterproof layer is not less than 300mm.
9. The retaining wall drainage structure and supporting device according to claim 8, characterized in that: A single drainage pipe includes an inclined outlet pipe, a vertically arranged water supply pipe, and a plurality of inclined inlet pipes, wherein the ends of the outlet pipe and the inlet pipe close to the inner side of the retaining wall are higher than the ends close to the outer side of the retaining wall; the plurality of inclined inlet pipes are arranged at intervals on the same vertical plane, and the ends of the inlet pipes close to the outer side of the retaining wall are connected to the drain pipe; the bottom end of the drain pipe is connected to the end of the outlet pipe close to the inner side of the retaining wall.
10. The retaining wall drainage structure and supporting device according to claim 9, characterized in that: Several drainage pipes are arranged at equal intervals along the length direction of the retaining wall; in the same drainage pipe, the inlet pipes are arranged vertically at equal intervals, with an interval range of 1.5m to 3m; the slope range of the inlet pipe and the outlet pipe is 3% to 7%.