A prefabricated concrete slope protection system based on slope back drainage

By using prefabricated retaining wall modules and point anchor cable structures, combined with slope back filter strips and wall base overflow ditches, drainage holes are eliminated, achieving rapid construction, effective drainage, and environmentally friendly landscape effects for the slope protection system. This solves the problems of complex construction, easy clogging, and pollution associated with traditional slope protection systems.

CN224514249UActive Publication Date: 2026-07-17BEIJING HANGTIANWANYUAN ARCHITECTURE ENG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
BEIJING HANGTIANWANYUAN ARCHITECTURE ENG CO LTD
Filing Date
2025-07-18
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing slope protection systems suffer from problems such as complex construction, easy blockage, high cost, poor landscape quality, and pollution. Traditional retaining walls and concrete shotcrete support are difficult to construct, waste resources, and cause pollution.

Method used

The prefabricated retaining wall modules and point anchor cable structure are adopted, combined with slope back filter material belt and wall base overflow ditch, eliminating the need for drainage holes and realizing the underground drainage design. The drainage system is constructed through prefabricated modules and HDPE sleeves.

Benefits of technology

It simplifies the construction process, improves construction efficiency, reduces material costs, enhances landscape quality, and achieves environmentally friendly and efficient drainage, avoiding the clogging and pollution problems of traditional drainage holes.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of prefabricated concrete slope protection systems based on slope back drainage, including retaining wall slope protection system and prefabricated module slope protection system;The retaining wall slope protection system is used for slope body vertical face slope protection and drainage;The retaining wall slope protection system includes retaining wall, counter overflow ditch and water collection / cut-off ditch pressure coping stone groove;The prefabricated module slope protection system is used for slope body inclined slope face slope protection and drainage;The prefabricated module slope protection system includes several prefabricated modules, several HDPE sleeve and drainage main pipeline;The utility model has the advantages that: point type anchor cable structure is adopted, and construction process is simplified;Retaining wall slope back drainage structure construction method is adopted, cancels traditional drain hole, adds slope back filter material belt and wall root return overflow ditch, so that slope top rainwater or slope internal stagnant water is darkly drained, frost heaving is prevented;Through darkly drained design, wall surface mildew, long green moss and other problems are avoided, and the landscape quality of slope protection layer exposed surface is improved.
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Claims

1. A precast concrete slope protection system based on back slope drainage, characterized in that: The system includes a retaining wall slope protection system and a precast module slope protection system. The retaining wall slope protection system is used for slope protection and drainage on the vertical surface of the slope. The retaining wall slope protection system includes a retaining wall, an overflow ditch, and a collection / interception ditch with a capping stone trough. The precast module slope protection system is used for slope protection and drainage on the sloping surface of the slope. The precast module slope protection system includes several precast modules, several HDPE sleeves, and a main drainage pipe.

2. The precast concrete slope protection system based on back slope drainage according to claim 1, characterized in that: The retaining wall is composed of several wall panel modules horizontally connected together. The wall panel modules are connected and fixed to the slope surface via prestressed anchor cables. Each wall panel module is a precast assembled concrete structure. Several anchor cable holes are pre-drilled on both sides of the front of each wall panel module. These holes are used to connect prestressed anchor cables, which then fix the wall panel module to the slope surface. Corresponding ribs are provided on the left and right sides of the back of each wall panel module. These ribs are vertical square column structures. Several through-holes are provided on both sides of the two ribs. These through-holes are circular pre-drilled holes. The through-holes are vertically distributed and used to connect adjacent wall panel modules. A concave drainage channel is formed between two ribs. This drainage channel is used to drain rainwater flowing down from the upper part of the slope or seepage water from the slope. Filter material is backfilled into the drainage channel, forming a filter strip.

3. A precast concrete slope protection system based on slope back drainage according to claim 2, characterized in that: The number of drainage channels is the same as the number of wall panel modules, and several of the drainage channels form a vertically parallel drainage strip at the rear of the retaining wall.

4. The precast concrete slope protection system based on slope back drainage of claim 1, wherein: The lower part of the retaining wall is below the soil surface, and the bottom of the retaining wall is below the frost line. The bottom of the retaining wall is located in the middle of the overflow ditch, which is used to collect and drain seepage and accumulated water from the back side of the slope. The overflow ditch is a structural ditch paved with precast concrete slabs that are wider at the top and narrower at the bottom. The length of the overflow ditch is the same as the length of the retaining wall. The width of the overflow ditch is greater than the width of the retaining wall, and the front part of the overflow ditch is located outside the retaining wall. The bottom of the overflow ditch is provided with several drainage outlets, which are connected to the municipal drainage system through pipes.

5. A precast concrete slope protection system based on slope back drainage according to claim 4, characterized in that: The overflow ditch is also filled with filter material to form a filter material strip in the ditch, and the filter material strip in the ditch is connected to the filter material strip at the rear of the retaining wall; a planting layer is provided above the filter material in the overflow ditch, and the planting layer is used to plant plants; the planting layer is planting soil.

6. The precast concrete slope protection system based on slope back drainage according to claim 4, characterized in that: The drainage channels and overflow ditches behind the retaining wall form a drainage belt, creating a concealed drainage system.

7. The precast concrete slope protection system based on slope back drainage according to claim 1, characterized in that: The coping stone trough of the water collection / interception ditch is a rectangular trough structure with an integrated design; the coping stone trough is installed on the top of the retaining wall, and its back rests against the upper part of the slope; the rear side of the coping stone trough has several vertical openings for collecting / intercepting rainwater flowing down from the top of the slope; the coping stone trough is filled with planting soil for planting landscape plants.

8. The precast concrete slope protection system based on slope back drainage according to claim 1, characterized in that: The prefabricated module is a prefabricated concrete arched tile structure. The surface of the prefabricated module has several transverse anti-slip textures to impede rapid rainwater erosion. Symmetrical sockets are provided on both the left and right sides of the prefabricated module. These sockets are through-hole structures used to connect HDPE sleeves. A circular groove is provided in the center of the inner wall of each socket. The prefabricated module also has a "V"-shaped groove located between the left and right sockets, connecting to the sockets on both sides. This "V"-shaped groove serves as a water guide to collect rainwater seeping from the slope. The HDPE sleeve is used to connect and fix adjacent prefabricated modules, and also to connect the "V"-shaped grooves of adjacent prefabricated modules. Annular ribs are provided on both the left and right sides of the HDPE sleeve, which engage with the annular grooves within the sockets of two adjacent prefabricated modules.

9. A precast concrete slope protection system based on back slope drainage according to claim 1, characterized in that: The main drainage pipe is used to collect and discharge rainwater or seepage water discharged from the HDPE sleeve; there are two main drainage pipes, located on the left and right sides of the prefabricated module slope protection system, respectively, and connected to the HDPE sleeves on the left and right sides of the prefabricated module slope protection system; the main drainage pipe is provided with several vertical installation ports, which are used to connect and fix the HDPE sleeve located on the outermost prefabricated module; the lower outlet of the main drainage pipe corresponds to the drainage ditch.

10. The precast concrete slope protection system based on slope back drainage according to claim 9, characterized in that: The length of the main drainage pipe is greater than the length of the prefabricated modular slope protection system; the drainage ditch is located at the toe of the slope and is used to receive the drainage from the HDPE sleeve; the structure of the drainage ditch is the same as that of the overflow ditch; a geotextile filter layer is also laid on the vertical or inclined surface of the slope protection.