Three-dimensional combined structure suitable for shallow-buried water-rich soft stratum tunnel
By employing a three-dimensional combination structure of reinforced walls and curtain grouting bodies in shallow-buried, water-rich, and soft strata tunnels, the problems of limited surface grouting accuracy and limited grouting space inside the tunnel were solved, thus optimizing construction efficiency and cost and ensuring stability during tunnel excavation.
Patent Information
- Application Number
- CN202520856889.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-30
AI Technical Summary
Existing technologies for shallow-buried, water-rich, and soft strata tunnels suffer from poor drilling accuracy and reinforcement effect in surface grouting structures, while the grouting structures inside the tunnel have limited space and uneven diffusion, making it difficult to meet reinforcement requirements.
The structure employs a three-dimensional combination, including reinforced walls and curtain grouting bodies. The curtain grouting bodies are arranged in a ring around the reinforced walls to form a closed grouting ring, blocking the flow of groundwater and providing a stable working face.
It effectively reduces the amount of grouting work, improves construction efficiency, ensures the stability of the working face, reduces construction costs, and avoids water inrush and mudslide disasters.
Smart Images
Figure CN223923057U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tunnel reinforcement technology, specifically to a three-dimensional combined structure suitable for shallow-buried, water-rich, and soft strata tunnels. Background Technology
[0002] In soft strata, the surrounding rock is loose and unstable, and its bearing capacity decreases significantly upon contact with water. During excavation, the tunnel face is highly susceptible to instability, frequently experiencing water inrush, mudslides, and other disasters. Disturbance of the surrounding rock can easily lead to instability, causing tunnel deformation or even collapse. Grouting reinforcement structures include surface grouting and in-tunnel grouting, each with its own advantages and disadvantages: surface grouting suffers from poor drilling accuracy and reinforcement effect at greater depths, resulting in a large amount of unfinished drilling and high costs; in-tunnel grouting, on the other hand, suffers from limited construction space, poor grout diffusion uniformity in water-rich areas and soft substrata, and unsatisfactory reinforcement effects. Therefore, a single reinforcement structure is insufficient to meet the reinforcement needs of shallow-buried, water-rich, soft strata tunnels. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a three-dimensional combined structure suitable for shallow buried tunnels in water-rich and soft strata.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a three-dimensional combined structure suitable for shallow buried water-rich soft strata tunnels, including a reinforced wall and a curtain grouting body, wherein the curtain grouting body is arranged circumferentially around the tunnel face and is connected to the reinforced wall.
[0005] The number of the reinforced walls is at least two, and the at least two reinforced walls are arranged sequentially along the longitudinal direction of the tunnel.
[0006] The distance between two adjacent reinforced walls is 15-20m.
[0007] The bottom of the reinforced wall is inserted into the stratum below the groundwater.
[0008] The reinforced wall is installed vertically.
[0009] The distance between the top of the reinforced wall and the tunnel is 3 to 5 meters.
[0010] The thickness of the reinforced wall is 1.0~1.2m.
[0011] The thickness of the curtain grout body is 0.8~1.0m.
[0012] The beneficial effects of this utility model are as follows: the three-dimensional combined structure of this invention forms a closed grouting ring by reinforcing the wall and the curtain grouting body. This three-dimensional combined structure can effectively reduce grouting projects, reduce grouting workload, speed up construction, ensure construction period and cost, and at the same time improve the stability of the tunnel face during tunnel excavation. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the reinforced wall in the tunnel cross-section direction according to an embodiment of the present utility model;
[0014] Figure 2 This is a schematic diagram of the reinforced wall in the tunnel excavation direction according to an embodiment of the present utility model;
[0015] Figure 3 This is a schematic diagram of the curtain grouting body according to an embodiment of the present utility model;
[0016] Label Explanation:
[0017] 1. Reinforced wall structure; 2. Curtain grouting structure; 3. Tunnel. Detailed Implementation
[0018] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.
[0019] Please refer to Figures 1-3 A three-dimensional composite structure suitable for shallow-buried tunnels in water-rich and soft strata includes a reinforced wall and a curtain grouting body. The curtain grouting body is arranged circumferentially around the tunnel face and is connected to the reinforced wall.
[0020] As described above, the beneficial effects of this invention are as follows: This invention ensures the stability of the tunnel face after excavation by reinforcing a portion of the rock mass near the tunnel face. Specifically, a closed grouting ring is formed by connecting the reinforced wall and the curtain grouting body arranged circumferentially around the tunnel, ensuring the stability of the strata. The reinforced wall confines groundwater within a certain range, blocking its longitudinal flow along the tunnel, and provides a stable tunnel face for the curtain grouting body. This three-dimensional combined structure effectively reduces construction work, material input, and the permeability coefficient of the rock mass, cutting off the seepage path of groundwater to the free face and preventing the tunnel face from becoming unstable due to seepage.
[0021] Furthermore, the number of reinforced walls is at least two, and at least two reinforced walls are installed sequentially along the longitudinal direction of the tunnel.
[0022] Furthermore, the distance between two adjacent reinforced walls is 15-20m.
[0023] As can be seen from the above description, when the distance between two adjacent reinforced walls is too large, the stability of the reinforcement decreases, and when the distance is too small, it wastes resources and is prone to cracks.
[0024] Furthermore, the bottom of the reinforced wall is inserted into the stratum below the groundwater.
[0025] As can be seen from the above description, reinforcing the wall to block the longitudinal flow of groundwater along the tunnel can reduce the amount of water seeping into the open surface of the tunnel face and avoid water inrush and mudslide disasters.
[0026] Furthermore, the walls are reinforced by being installed vertically.
[0027] Furthermore, the distance between the top of the reinforced wall and the tunnel is 3 to 5 meters.
[0028] As can be seen from the above description, the top of the reinforced wall is located above the tunnel to improve the stability of the reinforcement.
[0029] Furthermore, the thickness of the reinforced wall is 1.0~1.2m.
[0030] Furthermore, the thickness of the curtain grout is 0.8~1.0m.
[0031] Please refer to Figures 1-3 Embodiment 1 of this utility model is a three-dimensional combined structure suitable for shallow-buried tunnels in water-rich and soft strata, comprising three reinforcing walls 1 and one curtain grouting body 2. The curtain grouting body 2 is arranged circumferentially around the tunnel face, and the reinforcing walls 1 are arranged sequentially along the longitudinal direction of the tunnel 3. The curtain grouting body 2 is connected to the reinforcing walls 1, and the reinforcing walls 1 are arranged vertically with their bottoms inserted into the strata below the groundwater. The distance between two adjacent reinforcing walls 1 is 18m, the distance between the top of the reinforcing wall 1 and the tunnel 3 is 4m, the thickness of the reinforcing walls 1 is 1.1m, and the thickness of the curtain grouting body 2 is 0.9m.
[0032] Embodiment two of this utility model is as follows:
[0033] The only difference between Example 2 and Example 1 is that the distance between two adjacent reinforced walls 1 is 15m, the distance between the top of the reinforced wall 1 and the tunnel 3 is 3m, the thickness of the reinforced wall 1 is 1.0m, and the thickness of the curtain grouting body 2 is 0.8m.
[0034] Embodiment 3 of this utility model is as follows:
[0035] The only difference between Example 3 and Example 1 is that the distance between two adjacent reinforced walls 1 is 20m, the distance between the top of the reinforced wall 1 and the tunnel 3 is 5m, the thickness of the reinforced wall 1 is 1.2m, and the thickness of the curtain grouting body 2 is 1.0m.
[0036] In summary, the three-dimensional combined structure for shallow-buried, water-rich, soft strata tunnels provided by this utility model has the following advantages:
[0037] 1. By setting up reinforced walls at intervals to reinforce part of the rock mass, the flow of groundwater along the longitudinal direction of the tunnel is blocked, the permeability coefficient of the rock mass is reduced, the stability of the tunnel face is ensured, a stable tunnel face is provided for the curtain grouting body, and the cost problems caused by a large number of empty drills at the top are avoided.
[0038] 2. The local three-dimensional combination structure of reinforced wall and curtain grouting body can achieve stable and reliable reinforcement while effectively reducing the amount of construction work.
[0039] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A three-dimensional composite structure suitable for shallow-buried tunnels in water-rich and soft strata, characterized in that, It includes a reinforced wall and a curtain grouting body, wherein the curtain grouting body is arranged circumferentially around the tunnel face and is connected to the reinforced wall.
2. The three-dimensional composite structure suitable for shallow-buried, water-rich, and soft strata tunnels according to claim 1, characterized in that, The number of reinforced walls is at least two, and at least two of the reinforced walls are arranged sequentially along the longitudinal direction of the tunnel.
3. The three-dimensional composite structure suitable for shallow-buried, water-rich, and soft strata tunnels according to claim 1, characterized in that, The distance between two adjacent reinforced walls is 15-20m.
4. The three-dimensional composite structure suitable for shallow-buried, water-rich, and soft strata tunnels according to claim 1, characterized in that, The bottom of the reinforced wall is inserted into the stratum below the groundwater.
5. The three-dimensional composite structure suitable for shallow-buried, water-rich, and soft strata tunnels according to claim 1, characterized in that, The reinforced wall is set vertically.
6. The three-dimensional composite structure suitable for shallow-buried, water-rich, and soft strata tunnels according to claim 5, characterized in that, The distance between the top of the reinforced wall and the tunnel is 3 to 5 meters.
7. The three-dimensional composite structure suitable for shallow-buried, water-rich, and soft strata tunnels according to claim 1, characterized in that, The thickness of the reinforced wall is 1.0~1.2m.
8. The three-dimensional composite structure for shallow-buried, water-rich, soft strata tunnels according to claim 1, characterized in that, The thickness of the curtain grout is 0.8~1.0m.