Anti-seepage device at joint of cofferdam and retaining wall
By installing steel plates, geomembranes and geogrid components at the junction of the cofferdam and the retaining wall, combined with filler layers and concrete pouring, an anti-seepage system is formed, which solves the seepage problem at the junction of the cofferdam and the retaining wall and ensures the stability and safety of dry land operations in the foundation pit.
Patent Information
- Application Number
- CN202422438964.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The junction between the cofferdam and the retaining wall is prone to seepage, making it impossible to ensure dry land operations in the foundation pit. Especially when the water level rises during the flood season, the external pressure increases, causing cracks at the junction.
The anti-seepage body is composed of steel plates, geomembranes, telescopic asphalt wood boards and geogrid components. The geomembrane is fixedly connected to the steel plate inside the retaining wall and cofferdam, and clay and sand are filled in the filling space to form an anti-seepage system. Finally, concrete is poured into the overall structure.
Effectively prevent seepage at the junction of the cofferdam and the retaining wall, ensure dry working conditions in the foundation pit, and improve construction stability and safety.
Smart Images
Figure CN223317213U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, in particular to an anti-seepage device at the junction of a cofferdam and a retaining wall. Background Art
[0002] A cofferdam is a temporary retaining structure used during the construction of permanent water conservancy facilities. Its purpose is to prevent water and soil from entering the building site, allowing drainage, excavation of foundation pits, and construction of structures within the cofferdam. A retaining wall, also known as an earth retaining wall, is a structure used to support roadbed fill or hillside soil, preventing deformation and instability.
[0003] At present, when structures need to be built in complex environments, in order to reduce the difficulty of support design, a new form of integrated design of retaining wall and cofferdam construction has been proposed. However, the current integrated structure of cofferdam and retaining wall is prone to seepage at the junction of the cofferdam and the retaining wall, and cannot ensure dry land operations in the foundation pit. When the water level outside the cofferdam rises during the flood season and the external pressure increases, the junction of the cofferdam and the retaining wall is prone to cracking.
[0004] Therefore, there is an urgent need to provide an anti-seepage device at the junction of the cofferdam and the retaining wall, which can prevent seepage at the junction of the cofferdam and the retaining wall and ensure dry land operation of the foundation pit compared with the existing technology. Utility Model Content
[0005] The utility model solves the technical problems existing in the prior art and provides an anti-seepage device at the junction of a cofferdam and a retaining wall.
[0006] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:
[0007] A seepage prevention device at the junction of a cofferdam and a retaining wall comprises a steel plate arranged inside the retaining wall and an anti-seepage body arranged inside the cofferdam, a geomembrane is provided inside the anti-seepage body, the geomembrane is fixedly connected to the steel plate, and telescopic asphalt wooden boards and geogrid components are sequentially arranged on the geomembrane from one end close to the steel plate to the end away from the steel plate, the geogrid component comprises a geogrid net and a filler layer, the geogrid net is fixedly connected to the geomembrane, a filler space is formed between the geogrid net and the geomembrane, a filler layer is provided inside the filler space, the material of the filler layer comprises clay and sand and gravel, and the material of the anti-seepage body is concrete.
[0008] Furthermore, the geogrid assembly is provided in plurality, and the plurality of geogrid assemblies are sequentially arranged along the length direction of the geomembrane.
[0009] Furthermore, two adjacent geogrid assemblies are arranged on different sides of the geomembrane.
[0010] Furthermore, the retaining wall includes a vertical arm and a support arm, the support arm is arranged on the outer facade of the vertical arm, and the steel plate is arranged inside the vertical arm.
[0011] Furthermore, the geomembrane is extended into the interior of the vertical arm.
[0012] Furthermore, the steel plate is arranged to extend into the interior of the cofferdam.
[0013] Furthermore, a groove is provided inside the vertical arm, and the steel plate is arranged inside the groove.
[0014] Furthermore, the cofferdam is a clay cofferdam.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] The utility model processes the geomembrane first, and staggeredly arranges geogrid components on both sides of the geomembrane, first sews the geogrid net on the geomembrane, and then fixes and connects the steel plate inside the wall, and then connects the geomembrane, the steel plate and the telescopic asphalt wooden board into a whole, and forms a telescopic structure between the geomembrane and the steel plate through the telescopic asphalt wooden board; then fills the filler space inside to form a filler layer, and finally concrete is poured on the anti-seepage body, and poured into a whole to form an anti-seepage system. The filler layer ensures that it works as a whole with the concrete, thereby ensuring the anti-seepage property of the junction of the cofferdam and the retaining wall, thereby ensuring dry land operation of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model from a top view angle.
[0018] Figure 2 yes Figure 1 Enlarged view of point A in the middle.
[0019] Figure 3 yes Figure 2 Enlarged view of point B in the middle.
[0020] Figure 4 It is a cross-sectional view of the utility model at the main viewing angle.
[0021] Description of reference numerals:
[0022] 1. Retaining wall; 11. Vertical arm; 12. Support arm; 2. Cofferdam; 21. Anti-seepage body; 3. Steel plate; 4. Telescopic asphalt wood board; 5. Geomembrane; 6. Geogrid assembly; 61. Geogrid; 62. Filling layer. DETAILED DESCRIPTION
[0023] The technical solution of the present invention will be clearly described below in conjunction with the accompanying drawings. Obviously, the embodiments described are not all embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that the directions or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", and "horizontal" are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.
[0024] like Figure 1 、 Figure 2 and Figure 4 As shown, the utility model provides an anti-seepage device at the junction of the cofferdam 2 and the retaining wall 1, including a steel plate 3, an anti-seepage body 21, a telescopic asphalt wooden board 4, a geomembrane 5 and a plurality of geogrid components 6; the steel plate 3 is arranged inside the retaining wall 1, the anti-seepage body 21 is arranged inside the cofferdam 2, and the telescopic asphalt wooden board 4, the geomembrane 5, and all the geogrid components 6 are arranged inside the anti-seepage body 21.
[0025] The retaining wall 1 includes a vertical arm 11 and a support arm 12. A plurality of support arms 12 are arranged at intervals along the length direction of the outer facade of the vertical arm 11. A groove is provided inside the vertical arm 11, and the steel plate 3 is arranged in the groove inside the vertical arm 11; the cofferdam 2 is a clay cofferdam 2, and a plurality of anti-seepage devices provided by the utility model are arranged at intervals along the length direction of the vertical arm 11 at the junction of the cofferdam 2 and the retaining wall 1.
[0026] like Figure 2 As shown, the steel plate 3 is arranged corresponding to the anti-seepage body 21, the geomembrane 5 arranged inside the anti-seepage body 21 extends and is inserted into the vertical arm 11, and the geomembrane 5 extending into the vertical arm 11 is fixedly connected to the steel plate 3. The telescopic asphalt wood board 4 and multiple geogrid components 6 are all arranged on the geomembrane 5 located inside the anti-seepage body 21. The telescopic asphalt wood board 4 is arranged close to the steel plate 3 relative to any geogrid component 6, and some geogrid components 6 are arranged on one side of the geomembrane 5 (such as Figure 2 The other part of the geogrid assembly 6 is arranged on the other side of the geomembrane 5 (as shown in FIG. Figure 2 The lower end of the geomembrane 5 shown in the figure), two adjacent geogrid assemblies 6 are located on both sides of the geomembrane 5; the steel plate 3 extends into the cofferdam 2, and the portion of the steel plate 3 extending into the cofferdam 2 is at a certain distance from the telescopic asphalt wooden board 4, that is, the portion of the steel plate 3 extending into the cofferdam 2 does not contact the telescopic asphalt wooden board 4.
[0027] like Figure 3As shown, the geogrid assembly 6 includes a geogrid net 61 and a filler layer 62. The geogrid net 61 is fixedly connected to the geomembrane 5. The geogrid net 61 and the geomembrane 5 form a filler space. The filler layer 62 is arranged inside the filler space. The material of the filler layer 62 is a mixture of clay and sand and gravel. The anti-seepage body 21 is formed by pouring concrete.
[0028] During the preparation of the present invention, the geomembrane 5 is first processed, and geogrid components 6 are staggered on both sides of the geomembrane 5. The geogrid net 61 is first sewn on the geomembrane 5, and then the steel plate 3 is fixedly connected inside the wall. The geomembrane 5, the steel plate 3 and the telescopic asphalt wooden board 4 are connected into a whole. A telescopic structure is formed between the geomembrane 5 and the steel plate 3 through the telescopic asphalt wooden board 4; then filling is performed inside the filling space to form a filling layer 62, and finally the anti-seepage body 21 is concreted and poured into a whole to form an anti-seepage body 21 system. The filling layer 62 is used to ensure that it functions as a whole with the concrete, thereby ensuring the anti-seepage property of the junction of the cofferdam 2 and the retaining wall, thereby ensuring dry land operation of the foundation pit.
[0029] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Simple modifications or equivalent replacements of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.
Claims
1. An anti-seepage device at the junction of a cofferdam and a retaining wall, characterized in that: It includes a steel plate arranged inside the retaining wall and an anti-seepage body arranged inside the cofferdam, a geomembrane is provided inside the anti-seepage body, the geomembrane is fixedly connected to the steel plate, and telescopic asphalt wooden boards and geogrid components are sequentially arranged on the geomembrane from one end close to the steel plate to the end far from the steel plate. The geogrid component includes a geogrid net and a filler layer, the geogrid net is fixedly connected to the geomembrane, and a filler space is formed between the geogrid net and the geomembrane. A filler layer is provided inside the filler space, and the material of the filler layer includes clay and sand and gravel. The material of the anti-seepage body is concrete.
2. The anti-seepage device at the junction of a cofferdam and a retaining wall according to claim 1, characterized in that: There are multiple geogrid assemblies, and the multiple geogrid assemblies are arranged in sequence along the length direction of the geomembrane.
3. The anti-seepage device at the junction of the cofferdam and the retaining wall according to claim 2, characterized in that: The two adjacent geogrid assemblies are arranged on different sides of the geomembrane.
4. The anti-seepage device at the junction of a cofferdam and a retaining wall according to claim 1, characterized in that: The retaining wall includes a vertical arm and a support arm, the support arm is arranged on the outer facade of the vertical arm, and the steel plate is arranged inside the vertical arm.
5. The anti-seepage device at the junction of the cofferdam and the retaining wall according to claim 4, characterized in that: The geomembrane is extended into the interior of the vertical arm.
6. The anti-seepage device at the junction of the cofferdam and the retaining wall according to claim 5, characterized in that: The steel plate is extended into the interior of the cofferdam.
7. The anti-seepage device at the junction of a cofferdam and a retaining wall according to claim 4, characterized in that: A groove is provided inside the vertical arm, and the steel plate is arranged inside the groove.
8. The anti-seepage device at the junction of a cofferdam and a retaining wall according to claim 1, characterized in that: The cofferdam is a clay cofferdam.