Inverted filtration drainage device and gravity type retaining wall inverted filtration drainage device
By using a prefabricated drainage blind ditch structure and a non-woven filter layer, the complex problem of existing anti-filtration package construction is solved, and rapid and efficient drainage effect and construction quality are improved.
Patent Information
- Application Number
- CN202422089547.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The existing anti-filter pack construction is complex, which affects the construction speed and quality, resulting in the stability of retaining wall projects.
The prefabricated drainage blind ditch structure and the non-woven filtering layer reverse filtration device is used to filter larger particles of rock and soil through the drainage blind ditch structure, and the filter layer filters fine particles, simplifying the construction process and improving quality.
It achieves rapid construction and high-quality drainage effects, improves construction efficiency and reduces project cost.
Smart Images
Figure CN223088469U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of protective walls, and particularly relates to an inverse filtering and drainage device and an inverse filtering and drainage device for a gravity retaining wall. Background Art
[0002] A gravity retaining wall is a commonly used slope retaining structure, and backfill soil is filled behind the wall. In order to drain the groundwater in the soil behind the wall, multiple drainage holes are arranged in the retaining wall. Through the water guiding function of the drainage holes, the groundwater in the soil behind the wall can be drained outside the wall.
[0003] In order to better drain groundwater, a retaining wall inverse filtering package is often used at the inlet of the drainage pipe. The retaining wall inverse filtering package refers to a sand and gravel filter bag used at the drainage outlet inside the retaining wall to prevent the water pipe from being blocked. Its composition from bottom to top is 20mm coarse gravel or crushed stone, 1 - 4mm sand and gravel or stone chips, geotextile, etc.
[0004] With the requirements of convenient engineering construction and rapid construction, the construction of the traditional inverse filtering package behind the retaining wall is complex, which affects the construction speed, and at the same time, the construction quality is difficult to control. In serious cases of quality problems, it will affect the drainage behind the retaining wall, and further affect the stability of the entire retaining wall project. Summary of the Utility Model
[0005] The purpose of the utility model is to overcome the problem that the existing inverse filtering package construction is complex and affects the construction speed and quality in the prior art, and to provide an inverse filtering and drainage device, which has the advantages of rapid construction and stable construction quality.
[0006] In order to achieve the above purpose, on the one hand, the utility model provides an inverse filtering and drainage device, which includes an inverse filtering structure and a drainage pipe connected to the inverse filtering structure. The inverse filtering structure includes a drainage blind ditch structure and a fixing member for fixing the drainage blind ditch structure. The drainage pipe is connected to the drainage blind ditch structure, and a filtering layer is sleeved on the drainage blind ditch structure.
[0007] The drainage blind ditch structure is a prefabricated structure that can filter larger particle soils such as sand and gravel. The filtering layer can further filter finer particle soils such as silt and clay. The double filtering structure makes the filtering of the soil more thorough. The drainage pipe is inserted into the drainage blind ditch structure, and the water filtered by the inverse filtering structure can be discharged through the drainage pipe. The structure of this inverse filtering and drainage device is simple, can be constructed quickly, improves the construction efficiency of the inverse filtering and drainage device, and the prefabricated drainage blind ditch structure improves the construction quality of the inverse filtering construction project. The inverse filtering and drainage device of the present application can be applied to the drainage systems of various engineering projects, and can also be applied to the drainage of various types of retaining walls in the fields of water conservancy projects, municipal engineering, railway engineering, etc.
[0008] Preferably, the drain pipe includes a water inlet end and a water outlet end. The water inlet end is inserted into the drainage blind ditch structure, and a plurality of small holes are opened on the water inlet end located within the drainage blind ditch structure.
[0009] The drain pipe discharges the water volume within the drainage blind ditch structure through the water outlet end. The plurality of small holes opened on the water inlet end section located within the drainage blind ditch structure can further increase the water passing capacity and drainage volume of the drain pipe.
[0010] Preferably, the filter layer is non-woven fabric.
[0011] The filter layer is set as non-woven fabric, which has stable quality, long service life, and low cost.
[0012] In the second aspect of the present utility model, a gravity retaining wall inverted filter drainage device is provided, which includes the above-mentioned inverted filter drainage device. The drain pipes are distributed within the gravity retaining wall, and the drain pipes are arranged with a slope in relation to the gravity retaining wall.
[0013] The embodiment of applying the inverted filter drainage device to the gravity retaining wall replaces the originally complex operation of the inverted filter bag structure with a prefabricated drainage blind ditch structure. In actual working conditions, only need to wrap the filter layer outside the drainage blind ditch structure, open through holes at the required positions of the filter layer and the drainage blind ditch structure, connect with the water inlet end of the drain pipe, and then use fixing parts to install the filter layer and the drainage blind ditch structure on the back slope wall of the gravity retaining wall, and backfill the soil behind the wall. The construction operation is more convenient and the construction efficiency is improved.
[0014] Preferably, the slope of the drain pipe in relation to the gravity retaining wall is set to 1% - 10%.
[0015] This design can further facilitate drainage.
[0016] Preferably, the cross-section of the drainage blind ditch structure is rectangular.
[0017] The cross-section being rectangular is an embodiment of the drainage blind ditch structure. The drainage blind ditch structure with a rectangular cross-section can fit well with the back slope wall surface of the gravity retaining wall, enabling the drainage blind ditch structure to be stably fixed on the back slope wall surface.
[0018] Preferably, the cross-section of the drainage blind ditch structure is semi-circular.
[0019] The cross-section of the drainage blind ditch structure being semi-circular is the second embodiment of the drainage blind ditch structure. The flat part of the drainage blind ditch structure is fitted with the back slope wall surface of the gravity retaining wall 1.
[0020] Preferably, the structure of the fixing part is matched with the structure of the drainage blind ditch structure and is fixed using bolts.
[0021] The structure of the fixing member is matched with the structure of the drainage blind ditch structure, which can be more conducive to the installation and fixation of the drainage blind ditch structure.
[0022] Preferably, the fixing members are evenly distributed on the drainage blind ditch structure.
[0023] In order to stably install the drainage blind ditch structure on the back slope wall surface of the gravity retaining wall 1, the fixing members are evenly distributed and fix the drainage blind ditch structure.
[0024] Preferably, the fixing members are arranged at intervals from the drain pipe.
[0025] Arranging the fixing members at intervals from the drain pipe can avoid the influence of the fixing members on seepage.
[0026] Through the above technical solution, by improving the drainage and filtration bag structure, while meeting the requirements of drainage rate, the construction quality is ensured, the installation and disassembly are convenient, the materials and energy are saved, and the project cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 is a schematic cross-sectional view of the drainage and filtration for application to a gravity retaining wall;
[0028] Figure 2 is Figure 1 the enlarged structure schematic diagram of A in
[0029] Figure 3 is a front view of the drainage and filtration for application to a gravity retaining wall.
[0030] DESCRIPTION OF THE REFERENCE NUMERALS
[0031] 1. Gravity retaining wall; 2. Railings; 3. Drain pipe; 31. Inlet end; 32. Outlet end; 33. Drainage direction; 4. Filtration structure; 41. Fixing member; 42. Drainage blind ditch structure; 43. Bolt; 5. Temporary excavation slope; 6. Backfill soil behind the wall; h1. Designed river bottom elevation; h2. Designed river water level; h3. Current ground elevation. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0032] The following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present invention, and are not intended to limit the present invention.
[0033] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower, left, right, inner, outer, far, near, front" usually refer to the orientation or positional relationship based on the orientation shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and thus should not be construed as a limitation to the present invention.
[0034] Such as Figure 1As shown, an inverted filter drainage device includes an inverted filter structure 4 and a drain pipe 3 connected to the inverted filter structure 4. The inverted filter structure 4 includes a drainage blind ditch structure 42 and a fixing member 41 for fixing the drainage blind ditch structure 42. The drain pipe 3 is connected to the drainage blind ditch structure 42, and a filter layer is sleeved on the drainage blind ditch structure 42.
[0035] The inverted filter structure 4 includes a drainage blind ditch structure 42 and a filter layer sleeved on the drainage blind ditch structure 42. The drainage blind ditch structure 42 is a precast structure that can filter larger particles of rock and soil such as sand and gravel, and is preferably a fully permeable polypropylene drainage blind ditch. Wrapping a filter layer outside the drainage blind ditch structure 42 can further filter finer particles of rock and soil such as silt and clay. The drain pipe 3 is inserted into the drainage blind ditch structure 42, and the water filtered by the inverted filter structure 4 can be discharged through the drain pipe 3. Specifically, through holes can be opened at positions corresponding to the drainage blind ditch structure 42 and the filter layer for the drain pipe 3, and the drain pipe 3 is inserted into the drainage blind ditch structure 42 through the through holes. The structure of this inverted filter drainage device is simple, can be constructed quickly, improves the construction efficiency of the inverted filter drainage device, and the precast drainage blind ditch structure 42 improves the construction quality of the inverted filter construction project.
[0036] Further, the drain pipe 3 includes a water inlet end 31 and a water outlet end 32. The water inlet end 31 is inserted into the drainage blind ditch structure 42, and a number of small holes are opened on the water inlet end 31 located inside the drainage blind ditch structure 42.
[0037] As Figure 1 shown, the water inlet end 31 of the drain pipe 3 passes through the filter layer and the drainage blind ditch structure 42 in sequence through the through hole and is inserted into the drainage blind ditch structure 42. The drain pipe 3 discharges the water volume inside the drainage blind ditch structure 42 through the water outlet end 32, and the drainage direction 33 of the water volume is as shown by the arrow in Figure 1 . To further increase the water passing capacity and drainage volume of the drain pipe 3, a number of small through holes are opened on the pipe wall of the water inlet end 31 section located inside the drainage blind ditch structure 42, so that the water volume can enter the drain pipe 3 through the end face and a number of small through holes of the water inlet end 31 and be discharged.
[0038] Further, the filter layer is non-woven fabric.
[0039] The filter layer is set as non-woven fabric, which has stable quality, long service life and low cost.
[0040] As Figure 1 shown, a gravity retaining wall inverted filter drainage device includes the aforementioned inverted filter drainage device. The drain pipes 3 are distributed inside the gravity retaining wall 1, and the drain pipes 3 are arranged at a slope with the gravity retaining wall 1.
[0041] The gravity retaining wall inverted filter drainage device is an embodiment of the inverted filter drainage device applied to the gravity retaining wall 1. As Figure 1As shown in the figure, drain pipes 3 are distributed in the gravity retaining wall 1. The surface opposite to the gravity retaining wall 1 is a temporary excavation slope 5. Backfill soil 6 is filled between the temporary excavation slope 5 and the gravity retaining wall 1, and the height of the backfill soil 6 needs to reach the current ground elevation h3. In order to increase the safety protection of the gravity retaining wall 1, a railing 2 is provided at the top of the gravity retaining wall 1. Generally, the height of the railing 2 is set to exceed three meters.
[0042] When laying the drain pipes 3 in the gravity retaining wall 1, the drain pipes 3 need to be set with a slope for better drainage. It should be noted that the water inlet end 31 of the drain pipe 3 needs to pass through the reserved hole of the formwork of the gravity retaining wall 1 and extend beyond the wall structure of the back slope of the gravity retaining wall 1 by a certain distance, preferably 100 mm. And small holes with a diameter of 20 mm are opened in the 100 mm long pipe section of the water inlet end 31 to increase the water passing capacity and drainage volume.
[0043] In this application, the drain pipes 3 are evenly arranged both vertically and horizontally in the gravity retaining wall 1. For example, the drain pipes 3 are distributed at an interval of 1500 mm in the vertical direction in the gravity retaining wall 1, and the drain pipes 3 can be distributed at an interval of 2000 mm in the horizontal direction in the gravity retaining wall 1. According to the interval of the drain pipes 3 on the back slope wall of the gravity retaining wall 1, through holes are opened at the corresponding positions of the drainage blind ditch structure 42, and the diameter of the through holes is not less than the pipe diameter of the drain pipe 3.
[0044] In the embodiment where the gravity retaining wall 1 is applied to a river course, as Figure 1 shown, the position of the lowest drain pipe 3 in the gravity retaining wall 1 is higher than the designed river bottom elevation h1, and the position of the highest drain pipe 3 in the gravity retaining wall 1 is higher than the designed river water level h2, so as to better drain the groundwater of the backfill soil 6 into the river course.
[0045] The embodiment of applying the anti-filter drainage device to the gravity retaining wall 1 replaces the originally complex anti-filter bag structure with a prefabricated drainage blind ditch structure 42. In actual working conditions, only the filter layer needs to be wrapped outside the drainage blind ditch structure 42, through holes are opened at the required positions of the filter layer and the drainage blind ditch structure 42, after connecting with the water inlet end 31 of the drain pipe 3, the filter layer and the drainage blind ditch structure 42 are installed on the back slope wall of the gravity retaining wall 1 using the fixing member 41, and then the backfill soil 6 can be backfilled. The construction operation is more convenient and the construction efficiency is improved.
[0046] Furthermore, the slope of the drain pipe 3 and the gravity retaining wall 1 is set to 1% - 10%.
[0047] To further facilitate drainage, the slope of the drain pipe 3 in the gravity retaining wall 1 is set to 1% - 10%. It should be noted that the definition of this 1% - 10% slope is that when the drain pipe 3 extends 100 m horizontally, the water inlet end 31 rises 1 - 10 m vertically, that is, the position of the water outlet end 32 of the drain pipe 3 is inclined downward relative to the position of the water inlet end 31, so as to drain the water volume in the drain pipe 3.
[0048] Furthermore, the cross-section of the drainage blind ditch structure 42 is rectangular.
[0049] To better install the drainage blind ditch structure 42 on the back slope wall of the gravity retaining wall 1, the cross-section of the drainage blind ditch structure 42 is set to be rectangular as Figure 2 shown, which can fit well with the back slope wall surface of the gravity retaining wall 1, so that the drainage blind ditch structure 42 can be stably fixed on the back slope wall surface.
[0050] Furthermore, the cross-section of the drainage blind ditch structure 42 is semi-circular.
[0051] The cross-section of the drainage blind ditch structure 42 being semi-circular is the second embodiment of the drainage blind ditch structure 42. The planar part of the drainage blind ditch structure 42 is fitted to the back slope wall surface of the gravity retaining wall 1, and the drainage blind ditch structure 42 is fixed on the back slope wall surface by the fixing member 41.
[0052] Furthermore, the structure of the fixing member 41 is matched with the structure of the drainage blind ditch structure 42 and is fixed using bolts 43.
[0053] The structure of the fixing member 41 being matched with the structure of the drainage blind ditch structure 42 can be more conducive to the installation and fixation of the drainage blind ditch structure 42. Specifically, if the cross-section of the drainage blind ditch structure 42 is rectangular, the structure of the fixing member 41 is in the shape of "ji", as Figure 2 shown, and the fixing member 41 is fixed on the back slope wall surface of the gravity retaining wall 1 using bolts 43; if the cross-section of the drainage blind ditch structure 42 is semi-circular, the structure of the fixing member 41 is in the shape of "Ω". The fixing member 41 can be made of stainless steel.
[0054] Furthermore, the fixing members 41 are evenly distributed on the drainage blind ditch structure 42.
[0055] To enable the drainage blind ditch structure 42 to be stably installed on the back slope wall surface of the gravity retaining wall 1, the fixing members 41 are evenly distributed and fixed to the drainage blind ditch structure 42, as Figure 3 shown.
[0056] Furthermore, the fixing member 41 and the drain pipe 3 are arranged at intervals.
[0057] As Figure 3As shown, the spacer arrangement between the fixing member 41 and the drain pipe 3 can avoid the influence of the fixing member 41 on water seepage.
[0058] In actual working conditions, the drainage blind ditch structure can adopt a finished all-permeable polypropylene rectangular drainage blind ditch, the filter layer can adopt non-woven fabric, the drain pipe 3 can adopt a UPVC drain pipe, and the fixing member 41 can adopt a stainless steel sheet or a high-strength plastic product.
[0059] The gravity retaining wall filter drainage device in this working condition mainly consists of an all-permeable polypropylene rectangular drainage blind ditch, non-woven fabric, a UPVC drain pipe and a fixing member 41. The construction process is as follows:
[0060] First, the installation of the UPVC drain pipe. First, bury the UPVC drain pipe inside the retaining wall formwork, ensuring a 3% longitudinal slope towards the river. The water inlet end 31 of the UPVC drain pipe needs to pass through the reserved hole of the retaining wall formwork and extend 100 mm beyond the back slope wall structure of the retaining wall. And drill a number of small holes with a diameter of 20 mm within the 100 mm length range of the water inlet end 31 of the UPVC drain pipe.
[0061] Second, the preparation of the drainage blind ditch structure 42. Prepare a rectangular all-permeable polypropylene drainage blind ditch suitable for the gravity retaining wall 1 project, generally with a cross-sectional dimension of not less than 200 mm * 300 mm, and wrap a layer of non-woven fabric outside it for standby. Drill holes at the corresponding positions on the drainage blind ditch according to the spacing of the drainage holes in the wall, and the hole diameter is not less than the diameter of the UPVC drain pipe.
[0062] Third, the installation of the drainage blind ditch structure 42. Align the drilled hole position of the drainage blind ditch with the position of the water inlet end 31 of the drain pipe 3, so that the drain pipe 3 can extend well into the drainage blind ditch structure 42, and then use a stainless steel sheet with a width of 100 mm and a length of about 900 mm (the length can be appropriately adjusted according to needs) to install bolts at both ends of the stainless steel sheet at a spacing of 2 m to fix the drainage blind ditch.
[0063] It should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present utility model will not further describe various possible combination methods.
[0064] In addition, any combination can be made between various different embodiments of the present utility model, as long as it does not violate the idea of the present utility model, it should also be regarded as the content disclosed by the present utility model.
Claims
1. An inverse filtration and drainage device, characterized in that, It includes a filter structure (4) and a drain pipe (3) connected to the filter structure (4). The filter structure (4) includes a drainage blind ditch structure (42) and a fixing member (41) for fixing the drainage blind ditch structure (42). The drain pipe (3) is connected to the drainage blind ditch structure (42), and the drainage blind ditch structure (42) is sleeved with a filter layer.
2. The filter drainage device according to claim 1, characterized in that, The drain pipe (3) includes a water inlet end (31) and a water outlet end (32). The water inlet end (31) is inserted into the drainage blind ditch structure (42), and a plurality of small holes are formed in the water inlet end (31) located within the drainage blind ditch structure (42).
3. The filter drainage device according to claim 2, characterized in that, The filter layer is non-woven fabric.
4. A gravity retaining wall filter drainage device, characterized in that, It includes the filter and drainage device according to any one of claims 1-3. The drain pipe (3) is distributed within the gravity retaining wall (1), and the drain pipe (3) is arranged at a slope with respect to the gravity retaining wall (1).
5. The gravity retaining wall filter drainage device according to claim 4, wherein The slope of the drain pipe (3) with respect to the gravity retaining wall (1) is set to 1% to 10%.
6. The gravity retaining wall anti-seepage drainage device according to claim 5, wherein, The cross-section of the drainage blind ditch structure (42) is rectangular.
7. The gravity retaining wall filter drainage device according to claim 5, characterized in that, The cross-section of the drainage blind ditch structure (42) is semi-circular.
8. The gravity retaining wall filter drainage device according to claim 5, characterized in that, The structure of the fixing member (41) is matched with the structure of the drainage blind ditch structure (42), and is fixed using bolts (43).
9. The gravity retaining wall filter drainage device according to claim 8, characterized in that The fixing members (41) are uniformly distributed on the drainage blind ditch structure (42).
10. The gravity retaining wall filter drainage device according to claim 9, characterized in that, The fixing member (41) is arranged at an interval from the drain pipe (3).