一种用于挡土墙的预制反滤包及挡土构造
By designing prefabricated filter bags, using a mesh-like skeleton and wire mesh to fix sand and gravel, and wrapping geotextile, the problem of filter bag shape control is solved, and a clear layered structure and improved stability are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY NO 2 ENG GROUP CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-17
AI Technical Summary
Existing construction methods make it difficult to control the shape of the filter bags, resulting in a weakened filtration effect and difficulty in forming a clear layered structure of "geotextile → gravel → crushed stone".
The prefabricated filter bag consists of a grid-like frame, layered gravel and crushed stone chambers, which are filled with gravel and crushed stone respectively. It is fixed with wire mesh and wrapped with geotextile to ensure that all components are firmly connected and form an integral structure.
Precise control of the shape of the filter bag was achieved, ensuring a clear internal layered structure and improving the filter efficiency and the stability of the retaining structure.
Smart Images
Figure CN224514268U_ABST
Abstract
Claims
1. A prefabricated reverse filter bag for a retaining wall, characterized in that, include: A frame (101) is a mesh structure. The frame (101) contains a gravel bin (102) and a crushed stone bin (103) arranged in layers. The crushed stone bin (103) is located below the gravel bin (102). The gravel bin (102) is filled with gravel, and the crushed stone bin (103) is filled with crushed stone. A first wire mesh is arranged around the gravel bin (102), and a second wire mesh is arranged around the crushed stone bin (103). Both the first and second wire meshes are connected to the frame (101). The aperture size of the first wire mesh is smaller than the particle size of the gravel, and the aperture size of the second wire mesh is smaller than the particle size of the crushed stone. Geotextile (104) is wrapped around the periphery of the skeleton (101).
2. A precast filter bag for retaining walls according to claim 1, wherein, The first wire mesh, the second wire mesh, and the geotextile (104) are all fixed to the skeleton (101) by binding straps.
3. A precast filter bag for retaining walls according to claim 1, wherein, The frame (101) is welded from steel bars or steel strips.
4. A precast filter bag for retaining walls according to claim 1, wherein, The mesh size of the skeleton (101) is 5cm-10cm.
5. A precast filter bag for retaining walls according to any one of claims 1-4, characterized in that, The frame (101) has a right trapezoidal cross-sectional shape; the frame (101) is connected to the retaining wall (2) along the side of the right-angled leg of the right trapezoid; the crushed stone bin (103) is located near the right-angled leg and the lower base of the right trapezoid; the gravel bin (102) is located near the sloping leg and the upper base of the right trapezoid.
6. A precast filter bag for retaining walls according to claim 5, wherein, The gravel has a particle size of 1.2mm-2mm, and the crushed stone has a particle size of 20mm-30mm.
7. A retaining structure characterised in that, The device includes a retaining wall (2) and a prefabricated filter bag (1) for the retaining wall as described in any one of claims 1-6. The retaining wall (2) is provided with a drainage hole (3). The back of the retaining wall (2) is a backfill area (4). The filter bag (1) is placed in the backfill area (4) and connected to the drainage hole (3).
8. A retaining structure according to claim 7, wherein The bottom of the filter bag (1) is provided with a water sealing layer (6).
9. A retaining structure according to claim 8, wherein The geotextile (104) of the filter bag (1) has an overlap section, which is connected to the retaining wall (2) or the water sealing layer (6) by steel nails.
10. A retaining structure according to claim 7, wherein The top of the backfill area (4) is provided with a sealing layer (5), which is connected to the top surface of the retaining wall (2). A drainage ditch (7) is provided on the side of the sealing layer (5) away from the retaining wall (2).