A seepage prevention system consisting of concrete retaining walls, concrete cut-off walls, and concrete spike walls.
By using the connection structure of concrete retaining walls, anti-seepage walls, and spiked walls, and by employing waterstop strips and groove designs, the problem of loose connection between the concrete anti-seepage wall and the revetment retaining wall was solved, achieving reliable connection and structural stability in hydropower projects and enhancing the anti-seepage effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NORTHWEST ENGINEERING CORPORATION LIMITED
- Filing Date
- 2025-08-08
- Publication Date
- 2026-07-03
AI Technical Summary
In the foundations of cofferdams in the main riverbed of hydropower projects and water-retaining structures in water conservancy projects, the connection between concrete anti-seepage walls and concrete retaining walls of revetments is often loose or has leakage channels, which affects the anti-seepage effect and structural stability, and poses a safety hazard, especially under high water pressure conditions.
The seepage prevention system consists of concrete retaining walls, concrete cut-off walls, and concrete spiked walls. The concrete retaining walls and concrete cut-off walls are connected by concrete spiked walls. Waterstop strips and groove structures are used to extend the seepage path, enhance the connection sealing, and achieve reliable connection and structural stability.
It effectively reduces or prevents water seepage to the back slope of the building, improves the sealing and structural stability of the connection points, enhances the seepage prevention effect, solves the problem of leakage channels, and ensures the safety of the project.
Smart Images
Figure CN224451525U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water conservancy engineering technology, and more specifically, to a seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall. Background Technology
[0002] In the foundations of cofferdams in hydropower projects and water-retaining structures in water conservancy projects, the connection between concrete anti-seepage walls and revetment concrete retaining walls often suffers from loose connections or leakage channels. Traditional connection methods often employ simple butt joints or overlaps, making it difficult to ensure the airtightness of the joints. This allows water flowing from the upstream side of the retaining structure to seep through gaps in the connection to the downstream side, affecting not only the anti-seepage effect but also reducing structural stability. The seepage problem is particularly pronounced under high water pressure conditions, potentially leading to foundation seepage damage and structural instability. While existing technologies have attempted various water-stopping measures, problems remain, such as complex construction and unsustainable water-stopping effects. Utility Model Content
[0003] The purpose of this utility model is to provide a seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall, which has the advantages of improving the sealing of the connection parts, enhancing the seepage prevention effect, and improving the structural stability.
[0004] This utility model provides a seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall, comprising: a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall, wherein the concrete retaining wall and the concrete anti-seepage wall are connected by the concrete spiked wall, and the concrete retaining wall and the concrete spiked wall are integrally cast structures; a groove is formed at one end of the concrete spiked wall facing the concrete anti-seepage wall, and one end of the concrete anti-seepage wall near the concrete spiked wall is embedded in the groove; a water-stop strip is arranged on the contact surface between the concrete anti-seepage wall and the inner wall of the groove.
[0005] This utility model provides a seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall, which, compared with the prior art, has the following beneficial effects, but is not limited to:
[0006] The seepage prevention system composed of the concrete retaining wall, concrete anti-seepage wall, and concrete spiked wall described in this utility model, compared with the prior art, can solve the problems of loose connection or leakage channels between the foundation concrete anti-seepage wall and the revetment concrete retaining wall of the main riverbed cofferdam in hydropower projects and the water-retaining structure of the river channel in water conservancy projects. By connecting the concrete retaining wall and the concrete anti-seepage wall with the concrete spiked wall, the seepage path is extended, so as to reduce or prevent the water flow from the water-facing side of the water-retaining structure to the back slope of the structure, and realize the reliable connection and structural stability of the concrete anti-seepage wall and the revetment concrete retaining wall.
[0007] Optionally, a plurality of the waterstop strips are arranged at intervals between the concrete anti-seepage wall and the inner wall of the groove.
[0008] Optionally, the two ends of the waterstop strip are cut into trapezoidal shapes.
[0009] Optionally, the waterstop strip is a widened waterstop strip with a thickness of 1cm and a width of 10cm.
[0010] Optionally, the concrete spiked wall is provided with a backfill grouting hole that communicates with the groove.
[0011] Optionally, the length of the concrete cutoff wall embedded within the concrete spiked wall is less than the length of a single construction trench segment of the concrete cutoff wall.
[0012] Optionally, the length of the concrete anti-seepage wall embedded in the concrete spiked wall is greater than or equal to 1.5m.
[0013] Optionally, the length of the concrete cutoff wall embedded in the concrete spiked wall is 2 to 3 times the thickness of the concrete cutoff wall.
[0014] Optionally, the width of the groove is greater than the thickness of the concrete impermeable wall.
[0015] Optionally, the concrete spiked wall has a pre-embedded groove above it for installing a composite geomembrane. Attached Figure Description
[0016] Figure 1 This is a longitudinal sectional view of the connection between the concrete retaining wall and the concrete anti-seepage wall in an embodiment of this utility model;
[0017] Figure 2 This is a diagram showing the connection between the concrete retaining wall and the concrete anti-seepage wall in an embodiment of this utility model.
[0018] Explanation of reference numerals in the attached figures:
[0019] 1. Concrete retaining wall; 2. Concrete anti-seepage wall; 3. Concrete spiked wall; 31. Groove; 32. Embedded groove; 33. Backfill grouting hole; 4. Waterstop strip; Detailed Implementation
[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0021] In the description of this utility model, the orientation or positional relationship indicated by terms such as "up", "down", "left", "right", "top", "bottom", "front", "back", "inner" and "outer" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this utility model and is not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this utility model.
[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0023] In the description of this specification, references to terms such as "embodiment," "one embodiment," and "one implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.
[0024] Furthermore, in the attached diagram, the X-axis represents the horizontal direction, that is, the left and right position, with the positive direction of the X-axis representing the left and the negative direction of the X-axis representing the right; the Y-axis represents the vertical direction, that is, the front and back position, with the positive direction of the Y-axis representing the front and the negative direction of the Y-axis representing the back; and the Z-axis represents the vertical direction, that is, the up and down position, with the positive direction of the Z-axis representing the up and the negative direction of the Z-axis representing the down.
[0025] It should also be noted that the aforementioned X-axis, Y-axis and Z-axis are used only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.
[0026] like Figures 1 to 2As shown in the figure, the seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall in this embodiment of the present invention includes: a concrete retaining wall 1, a concrete anti-seepage wall 2, and a concrete spiked wall 3. The concrete retaining wall 1 and the concrete anti-seepage wall 2 are connected by the concrete spiked wall 3, and the concrete retaining wall 1 and the concrete spiked wall 3 are integrally cast structures. A groove 31 is provided at one end of the concrete spiked wall 3 facing the concrete anti-seepage wall 2, and the end of the concrete anti-seepage wall 2 near the concrete spiked wall 3 is embedded in the groove 31. A waterstop strip 4 is arranged on the contact surface between the concrete anti-seepage wall 2 and the inner wall of the groove 31.
[0027] Among them, combined with the appendix Figure 1 As shown, the concrete spiked wall 3 refers to an inverted right-angled trapezoidal structure with a cross-section installed between the concrete retaining wall 1 and the concrete anti-seepage wall 2. The concrete spiked wall 3 can be poured simultaneously during the construction of the concrete retaining wall 1, ensuring a seamless connection between the two and preventing water seepage. The function of the concrete spiked wall 3 is to provide a connecting interface and accommodate one end of the concrete anti-seepage wall 2. The groove 31 refers to an opening formed at the end of the concrete spiked wall 3 facing the concrete anti-seepage wall 2 (see attached diagram). Figure 2 The groove structure (in the opposite direction of the X-axis) includes grooves 31 at the top and bottom (attached). Figure 1 The concrete piercing wall 3 extends through both ends of the Z-axis direction, so that the concrete anti-seepage wall 2 can be directly poured into the groove 31.
[0028] Specifically, the groove 31 can increase the connection strength and seepage path length between the concrete anti-seepage wall 2 and the concrete spiked wall 3. That is, water can seep into the groove 31 from the joint between the concrete anti-seepage wall 2 and the concrete spiked wall 3. The water will flow around the inner wall of the groove 31 before flowing to the other side, thereby extending the seepage path. During the flow of water along the inner wall of the groove 31, it will meet the waterstop strip 4. After encountering water, the waterstop strip 4 expands in volume to form a waterproof plastic colloid, which fills the concrete gap and achieves water stoppage, thereby reducing the possibility of water seeping along the contact surface of the groove 31 between the concrete anti-seepage wall 2 and the concrete spiked wall 3.
[0029] Compared with existing technologies, this technology can solve problems such as loose connections or leakage channels between the concrete anti-seepage wall and the concrete retaining wall of the riverbank in the main riverbed of hydropower projects and the water-retaining structure of the river channel in water conservancy projects. By connecting the concrete retaining wall and the concrete anti-seepage wall with concrete spikes, the seepage path is extended, thereby reducing or preventing water from seeping from the water-facing side of the water-retaining structure to the back slope of the structure, and achieving a reliable connection and structural stability between the concrete anti-seepage wall and the concrete retaining wall of the riverbank.
[0030] It should be noted that the seepage path of the water flow is as follows: Figure 2The direction of the arrow on the Y-axis, i.e., from the front side wall to the rear side wall of concrete spiked wall 3, indicates that the water-facing side and the back slope of the water-retaining structure refer to the directions of the front and rear side walls of concrete spiked wall 3, respectively. The extension directions of concrete cutoff wall 2 and concrete spiked wall 3 are as follows: Figure 1 Or attached Figure 2 In the X-axis direction, the thickness direction of concrete cut-off wall 2 and concrete spike wall 3 is attached. Figure 2 The Y-axis direction. The extension direction of concrete retaining wall 1 is attached. Figure 2 In the Y-axis direction.
[0031] Optionally, a plurality of the waterstop strips 4 are arranged at intervals between the concrete anti-seepage wall 2 and the inner wall of the groove 31.
[0032] The two ends of the waterstop strip 4 are cut into trapezoidal shapes.
[0033] The waterstop strip 4 is a widened waterstop strip with a thickness of 1cm and a width of 10cm.
[0034] In this embodiment, to reduce the possibility of water seepage along the contact surface of the groove 31 between the concrete anti-seepage wall 2 and the concrete spiked wall 3, three BW-II type waterstop strips (a rubber-based waterproof sealing material that expands in volume upon contact with water to form an impermeable plastic colloid, filling concrete gaps to achieve water stoppage; it belongs to the BW series of water-swellable waterstop strips) can be arranged at intervals on the contact surface. To ensure the water-stopping effect, the BW-II type waterstop strips can be widened to 1cm thickness and 10cm width. Before pouring the concrete anti-seepage wall 2, the BW-II type waterstop strips are fixed to the inner wall of the groove 31 with cement nails at 1m vertical spacing. The upper and lower ends of the BW-II type waterstop strips are cut into trapezoidal shapes to guide and avoid interference during the cleaning of the reserved concrete spiked wall holes, preventing damage to the BW-II type waterstop strips.
[0035] Optionally, the concrete spiked wall 3 is provided with a backfill grouting hole 33 that communicates with the groove 31.
[0036] In this embodiment, in conjunction with the appendix Figure 2 As shown, in order to ensure the integral connection between the concrete anti-seepage wall 2 and the concrete spiked wall 3, a backfill grouting hole 33 communicating with the groove 31 is opened on the concrete spiked wall 3. The gap between the concrete anti-seepage wall 2 and the concrete spiked wall 3 is backfilled with concrete grout, so that the concrete anti-seepage wall 2 and the concrete spiked wall 3 are connected into a whole, thereby enhancing the anti-seepage effect.
[0037] Optionally, the length (i.e., L3) of the concrete cutoff wall 2 embedded in the concrete spiked wall 3 is less than the length of a single construction trench a of the concrete cutoff wall 2.
[0038] In this embodiment, the length of the concrete anti-seepage wall 3 within the concrete pierced wall 3 should be less than the length of a single construction trench segment a of the concrete anti-seepage wall 2, so that the distance between the joint of the concrete anti-seepage wall 2 and the concrete retaining wall 1 is greater. (See attached...) Figure 1 As shown, the concrete cutoff wall 2 needs to be constructed in sections, that is, multiple individual construction trench sections a are poured separately to form the concrete cutoff wall 2.
[0039] It should be noted that, in order to reduce vibration damage to the concrete spike wall 3 and the concrete retaining wall 1 during the construction period of the concrete anti-seepage wall 2, the top elevation of the concrete spike wall 3 is the same as that of the concrete anti-seepage wall construction platform.
[0040] Optionally, the length (i.e., L3) of the concrete anti-seepage wall 2 embedded in the concrete spiked wall 3 is greater than or equal to 1.5m.
[0041] The length of the concrete cutoff wall 2 embedded in the concrete spiked wall 3 is 2 to 3 times the thickness of the concrete cutoff wall 2.
[0042] In this embodiment, in conjunction with the appendix Figure 1 and attached Figure 2 As shown, the concrete spiked wall 3 can be designed to be 3m wide. The top length of the concrete spiked wall 3 is L1, the length between the intersection of the top surface of the concrete spiked wall 3 and the inclined surface of the concrete retaining wall 1 and the inner wall of the groove 31, plus the length L3 of the concrete anti-seepage wall inside the concrete spiked wall. The length L2, the length between the intersection of the bottom surface of the concrete spiked wall 3 and the inclined surface of the concrete retaining wall 1 and the inner wall of the groove 31, plus the length L3 of the concrete anti-seepage wall inside the concrete spiked wall. The length L3 of the concrete anti-seepage wall extending into the concrete spiked wall should not be less than 1.5m, and can be selected with reference to the thickness of the concrete anti-seepage wall 2. Usually, the thickness of the concrete anti-seepage wall is 0.8m to 1.2m, and the length extending into the concrete spiked wall should be 2 to 3 times the wall thickness (it is recommended to take the upper limit when the maximum water head is higher than 40m; and the lower limit when the maximum water head is lower than 20m).
[0043] Optionally, the width of the groove 31 is greater than the thickness of the concrete anti-seepage wall 2.
[0044] In this embodiment, in conjunction with the appendix Figure 2 As shown, the width of groove 31 (see attached diagram) Figure 2 The thickness of the concrete cutoff wall (in the Y-axis direction) is designed to be greater than that of the concrete cutoff wall 2 (see attached). Figure 2 (in the Y-axis direction), so that after the concrete cutoff wall 2 is poured into the groove 31, the connection strength between the concrete cutoff wall 2 and the concrete spike wall 3 can be improved.
[0045] Optionally, the concrete spiked wall 3 has a pre-embedded groove 32 above it for installing a composite geomembrane.
[0046] In this embodiment, in conjunction with the appendix Figure 2 As shown, the pre-embedded groove 32 can be formed by pre-reserving a template. Its function is to provide installation space for the composite geomembrane. One end of the pre-embedded groove 32 penetrates the concrete retaining wall 3 and extends to the concrete retaining wall 1, while the other end extends to the groove 31. The pre-embedded groove 32 is not connected to the groove 31 to prevent cement from flowing into the pre-embedded groove 32 when the concrete anti-seepage wall 2 is poured. The composite geomembrane refers to a layered material composed of geotextile and anti-seepage membrane. Specifically, it can be made by hot-pressing polyethylene film and non-woven fabric together, and forms an anti-seepage layer by setting it in the pre-embedded groove 32.
[0047] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.
Claims
1. A seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall, characterized in that, include: A concrete retaining wall (1), a concrete anti-seepage wall (2), and a concrete spiked wall (3) are provided. The concrete retaining wall (1) and the concrete anti-seepage wall (2) are connected by the concrete spiked wall (3). The concrete retaining wall (1) and the concrete spiked wall (3) are integrally cast structures. A groove (31) is provided at one end of the concrete spiked wall (3) facing the concrete anti-seepage wall (2). The end of the concrete anti-seepage wall (2) near the concrete spiked wall (3) is embedded in the groove (31). A waterstop strip (4) is arranged on the contact surface between the concrete anti-seepage wall (2) and the inner wall of the groove (31).
2. The seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall according to claim 1, characterized in that, Multiple waterstop strips (4) are spaced apart between the concrete anti-seepage wall (2) and the inner wall of the groove (31).
3. The seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall according to claim 1, characterized in that, The two ends of the waterstop strip (4) are cut into trapezoidal shapes.
4. The seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall according to claim 1, characterized in that, The waterstop strip (4) is a widened waterstop strip (4) with a thickness of 1cm and a width of 10cm.
5. The seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall according to claim 1, characterized in that, The concrete spiked wall (3) has a backfill grouting hole (33) that communicates with the groove (31).
6. The seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall according to claim 5, characterized in that, The length of the concrete anti-seepage wall (2) embedded in the concrete spike wall (3) is less than the length of a single construction trench (a) of the concrete anti-seepage wall (2).
7. The seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall according to claim 1, characterized in that, The length of the concrete anti-seepage wall (2) embedded in the concrete spiked wall (3) is greater than or equal to 1.5m.
8. The seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall according to claim 1, characterized in that, The length of the concrete anti-seepage wall (2) embedded in the concrete spiked wall (3) is 2 to 3 times the thickness of the concrete anti-seepage wall (2).
9. The seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall according to claim 1, characterized in that, The width of the groove (31) is greater than the thickness of the concrete anti-seepage wall (2).
10. The seepage prevention system composed of a concrete retaining wall, a concrete anti-seepage wall, and a concrete spiked wall according to claim 1, characterized in that, The concrete spiked wall (3) has a pre-embedded groove (32) above it for installing the composite geomembrane.