Underground drainage system applied to slope deep-buried retaining wall
By designing an underground drainage system including drainage pipes and water barriers, the problem of large amount of water trapped below the ground of the slope-deep buried retaining wall is solved, preventing rainwater from seeping, protecting foundation integrity and extending the service life of the retaining wall.
Patent Information
- Application Number
- CN202420581735.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-03-25
AI Technical Summary
In slope areas where the cover is thicker and the holding layer is buried deeper, when the retaining wall is buried deeper, the amount of water trapped below the ground is relatively large. If separate drainage measures are not considered, rainwater may seep down to the bottom of the retaining wall along the terrain, resulting in long-term water immersion of the foundation, affecting the foundation bearing capacity and causing damage to the retaining wall.
An underground drainage system applied to deep-buried retaining walls in slopes is designed, including drainage pipes and water barriers. The drainage pipes penetrate the retaining walls and filters are installed. The water barriers are arranged at the inlet and outlets to prevent liquid from infiltration. The ground drain pipes and underground drain pipes are arranged intertwined in vertical and/or horizontal directions, with an inclination angle of 3% to 5% outside the slope, and a spacing distance of 2 to 3m.
By setting up filters and water barriers, the internal blockage of drainage pipes can be effectively prevented from being blocked and liquid infiltration, ensuring the integrity of the foundation of the retaining wall to the maximum extent, extending the service life of the retaining wall, and reducing the risk of foundation water immersion and bearing capacity reduction.
Smart Images
Figure CN222632456U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of geotechnical engineering retaining wall design, in particular to an underground drainage system applied to a slope deep-buried retaining wall. Background Art
[0002] Retaining walls are used to maintain the stability of slopes and thus maintain the safety of structures near the slopes. In general, the depth of retaining walls on slopes is relatively small, generally 0.6m~1.0m, and no drainage pipes are set up under the ground, so rainwater is naturally dispersed and seeped out. However, for slopes with thicker cover layers and deeper bearing layers, retaining walls are often buried at a greater depth, up to 3m~4.0m. In this case, the amount of water collected below the ground is large. If separate drainage measures are not considered, rainwater on the back of the wall can only infiltrate to the bottom of the retaining wall along the terrain, which may cause long-term flooding of the foundation and affect the bearing capacity of the foundation, thereby causing damage to the retaining wall. Utility Model Content
[0003] The purpose of the utility model is to provide an underground drainage system for deeply buried retaining walls on slopes to address the above-mentioned shortcomings, thereby solving the problem in the prior art that when the amount of water below the ground is large, if no separate drainage measures are considered, rainwater on the back of the wall can only seep down to the bottom of the retaining wall along the terrain, which may cause long-term immersion in the foundation and thus affect the bearing capacity of the foundation, thereby causing damage to the retaining wall.
[0004] The utility model is realized by the following scheme:
[0005] An underground drainage system applied to a deep-buried retaining wall on a slope, including at least but not limited to a drainage pipe and a waterproof layer, wherein the drainage pipe runs through the retaining wall, a filter is provided at the water inlet of the drainage pipe, and the waterproof layer is provided at the water inlet and outlet of the drainage pipe.
[0006] Based on the above-mentioned underground drainage system applied to a deep-buried retaining wall on a slope, at least two types of drainage pipes are arranged along the height direction of the retaining wall, namely, surface drainage pipes and underground drainage pipes, and the surface drainage pipes and underground drainage pipes are staggered in the vertical and / or horizontal directions respectively.
[0007] Based on the above-mentioned underground drainage system applied to a sloped deep-buried retaining wall, the surface drainage pipe and the underground drainage pipe are inclined from the water inlet to the water outlet, and the inclination angle is: a slope of 3% to 5% outside the slope surface.
[0008] Based on the above-mentioned underground drainage system applied to a slope deep-buried retaining wall, the spacing distance between the surface drainage pipe and the underground drainage pipe is 2 to 3 meters.
[0009] Based on the above-mentioned underground drainage system applied to a deeply buried retaining wall on a slope, the waterproof layer is a clay waterproof layer and a mortared stone facing layer; the waterproof layer at the water inlet of the ground drainage pipe and the underground drainage pipe is a clay waterproof layer; the waterproof layer at the water outlet of the ground drainage pipe is a mortared stone facing layer; the waterproof layer at the water outlet of the underground drainage pipe is a clay waterproof layer.
[0010] Based on the above-mentioned underground drainage system applied to a deep-buried retaining wall on a slope, a crushed stone drainage layer is arranged on the clay waterproof layer at the outlet of the underground drainage pipe.
[0011] Based on the above-mentioned underground drainage system applied to the deep-buried retaining wall on the slope, the filter element includes a permeable geotextile and sand and gravel; and an anti-filter bag formed by the permeable geotextile wrapping the sand and gravel.
[0012] Based on the above-mentioned underground drainage system applied to a deep-buried retaining wall on a slope, the diameter of the drainage pipe is 10 cm, and the thickness of the clay waterproof layer on the water inlet side of the ground drainage pipe is not less than 300 mm; the thickness of the clay waterproof layer on the water inlet side of the ground drainage pipe is not less than 300 mm.
[0013] Based on the above-mentioned underground drainage system applied to the deep-buried retaining wall on the slope, the thickness of the crushed stone drainage layer is 300 mm.
[0014] Based on the above-mentioned underground drainage system applied to the deep-buried retaining wall on the slope, the thickness of the mortar-made stone facing layer is not less than 300 mm and is prepared by using M7.5 or M10 mortar.
[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0016] 1. In this scheme, a filter is provided at the drain pipe to effectively prevent internal blockage of the pipe. At the same time, a waterproof layer is provided at the water inlet of the drain pipe to prevent liquid from penetrating downward and damaging the foundation on the back side of the retaining wall. At the same time, a waterproof layer is provided at the water outlet of the drain pipe to prevent drainage from penetrating downward and damaging the foundation on the wall side of the retaining wall, thereby maximizing the integrity of the retaining wall foundation and extending the service life of the retaining wall.
[0017] 2. This scheme effectively prevents rainwater from seeping into the retaining wall foundation by setting up surface mortar stone protection and underground clay waterproof layer, which can effectively reduce the risk of foundation flooding, reduced bearing capacity and thus damage to the retaining wall. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the structure of the utility model applied to a vertical gravity retaining wall;
[0019] Figure 2This is a schematic diagram of the structure of the utility model applied to a pitch-down gravity retaining wall;
[0020] Figure 3 This is a schematic diagram of the structure of the utility model applied to an inclined gravity retaining wall;
[0021] Figure 4 This is a schematic diagram of the structure of the utility model applied to a counterweight retaining wall;
[0022] Description of the drawings: 1. Retaining wall; 2. Ground drainage pipe; 3. Underground drainage pipe; 4. Clay water-proof layer; 5. Mortared stone facing layer; 6. Gravel drainage layer; 7. Permeable geotextile; 8. Sand and gravel. DETAILED DESCRIPTION
[0023] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.
[0024] Any feature disclosed in this specification (including any additional claims and abstract), unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.
[0025] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0026] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.
[0027] Example 1
[0028] like Figure 1 and 4 As shown, the utility model provides a technical solution:
[0029] An underground drainage system applied to a deep-buried retaining wall on a slope, which at least includes but is not limited to a drainage pipe and a water-blocking layer, wherein the drainage pipe runs through the retaining wall 1, and a filter is arranged at the water inlet of the drainage pipe; the water-blocking layer is arranged at the water inlet and outlet of the drainage pipe;
[0030] Based on the above structure, a filter is provided at the drain pipe to effectively prevent internal blockage of the pipe. At the same time, a waterproof layer is provided at the water inlet of the drain pipe to prevent liquid from penetrating downward and damaging the foundation on the back side of the retaining wall 1; at the same time, a waterproof layer is provided at the water outlet of the drain pipe to prevent drainage from penetrating downward and damaging the foundation on the wall side of the retaining wall 1, thereby maximizing the integrity of the foundation of the retaining wall 1 and extending the service life of the retaining wall 1.
[0031] As an example, along the height direction of the retaining wall 1, at least two types of drainage pipes are provided, namely, a surface drainage pipe 2 and an underground drainage pipe 3, and the surface drainage pipe 2 and the underground drainage pipe 3 are staggered in the vertical and / or horizontal directions;
[0032] The ground drainage pipe 2 and the underground drainage pipe 3 are inclined from the water inlet to the water outlet, and the inclination angle is: a slope of 3% to 5% outside the slope surface.
[0033] The distance between the ground drainage pipe 2 and the underground drainage pipe 3 is 2 to 3 meters.
[0034] Based on the above structure, by setting the drainage pipe at an angle, the flow of the liquid gathered on the back side of the wall can be accelerated. The ground drainage pipe 2 is set to be multiple, and the underground drainage pipe 3 is also set to be multiple, and the ground drainage pipe 2 and the underground drainage pipe 3 are both set to be multiple at intervals, and the ground drainage pipe 2 and the underground drainage pipe 3 are staggered; in this way, the drainage can be more uniform, the ground drainage pipe 2 can discharge the liquid on the ground, and the underground drainage pipe 3 can discharge the accumulated liquid that may exist underground, making the drainage more comprehensive.
[0035] As an example, the waterproof layer can be a clay waterproof layer 4 and a mortared stone facing layer 5; the waterproof layer at the water inlet of the ground drainage pipe and the underground drainage pipe 3 is a clay waterproof layer 4; the waterproof layer at the water outlet of the ground drainage pipe is a mortared stone facing layer 5; the waterproof layer at the water outlet of the underground drainage pipe 3 is a clay waterproof layer 4.
[0036] Based on the above structure, the clay waterproof layer 4 and the mortar-stone facing layer 5 can both achieve good waterproof effect and prevent liquid from penetrating downwards; waterproof layers with different compositions are used according to the different locations of the waterproof layers.
[0037] As an example, a crushed stone drainage layer 6 is provided on the clay water-proof layer 4 at the outlet of the underground drainage pipe 3;
[0038] Based on the above structure, since the underground drainage pipe 3 is located at the bottom, the gravel drainage layer 6 can be permeable to water and then drain the liquid. At the same time, with the isolation effect of the bottom clay waterproof layer 4, the liquid can only be discharged in a predetermined direction without penetrating downward to affect the foundation.
[0039] As an example, the filter element may include a permeable geotextile 7 and gravel 8; the geotextile wrapping the gravel 8 forms an inverted filter bag.
[0040] Based on the above structure, the filter element formed by wrapping the sand and gravel 8 with geotextile has low cost and is more durable.
[0041] As an example, the diameter of the drainage pipe is 10 cm, the thickness of the clay waterproof layer 4 on the water inlet side of the ground drainage pipe 2 is not less than 300 mm; the thickness of the clay waterproof layer 4 on the water inlet side of the ground drainage pipe 2 is not less than 300 mm; the thickness of the gravel drainage layer 6 is 300 mm;
[0042] The thickness of the mortar-made stone facing layer 5 is not less than 300 mm and is prepared by using M7.5 or M10 mortar.
[0043] This solution can be applied to a variety of retaining wall structures, such as Figures 1 to 4 As shown, the present solution can be applied to a vertical gravity retaining wall 1 , a tilted gravity retaining wall 1 , an upward-sloped gravity retaining wall 1 and a counterweight retaining wall 1 .
[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An underground drainage system applied to a deep-buried retaining wall on a slope, characterized in that: At least it includes but is not limited to a drainage pipe and a waterproof layer. The drainage pipe is set to penetrate the retaining wall, and a filter is set at the water inlet of the drainage pipe; the waterproof layer is set at the water inlet and outlet of the drainage pipe.
2. The underground drainage system for a slope deep-buried retaining wall as claimed in claim 1, characterized in that: Along the height direction of the retaining wall, there are at least two types of drainage pipes, namely, surface drainage pipes and underground drainage pipes, and the surface drainage pipes and underground drainage pipes are staggered in the vertical and / or horizontal directions.
3. The underground drainage system for a slope deep-buried retaining wall as claimed in claim 2, characterized in that: The ground drainage pipe and the underground drainage pipe are arranged obliquely from the water inlet to the water outlet, and the inclination angle is: a slope of 3% to 5% outside the slope surface.
4. The underground drainage system for a slope deep-buried retaining wall as claimed in claim 3, characterized in that: The distance between the ground drainage pipe and the underground drainage pipe is 2 to 3 meters.
5. The underground drainage system for a slope deep-buried retaining wall as claimed in claim 4, characterized in that: The waterproof layer is a clay waterproof layer and a mortar-stone protective layer; the waterproof layer at the water inlet of the ground drainage pipe and the underground drainage pipe is a clay waterproof layer; the waterproof layer at the water outlet of the ground drainage pipe is a mortar-stone protective layer; the waterproof layer at the water outlet of the underground drainage pipe is a clay waterproof layer.
6. The underground drainage system for a slope deep-buried retaining wall as claimed in claim 5, characterized in that: A crushed stone drainage layer is arranged on the clay water-proof layer at the water outlet of the underground drainage pipe.
7. An underground drainage system for a slope deep-buried retaining wall as claimed in claim 6, characterized in that: The filter element comprises a permeable geotextile and sand and gravel; and an anti-filter bag is formed by the permeable geotextile wrapping the sand and gravel.
8. The underground drainage system for a slope deep-buried retaining wall as claimed in claim 7, characterized in that: The diameter of the drainage pipe is 10 cm, and the thickness of the clay waterproof layer on the water inlet side of the ground drainage pipe is not less than 300 mm; the thickness of the clay waterproof layer on the water inlet side of the ground drainage pipe is not less than 300 mm.
9. An underground drainage system for a slope deep-buried retaining wall as claimed in claim 8, characterized in that: The thickness of the gravel drainage layer is 300 mm.
10. An underground drainage system for a slope deep-buried retaining wall as claimed in claim 9, characterized in that: The mortared stone facing layer has a thickness of not less than 300 mm and is made of M7.5 or M10 mortar.