A tunnel water inrush treatment device

Abstract

The application relates to the technical field of tunnel reinforcement, and particularly discloses a tunnel water inrush treatment device, which comprises two steel arch frames fixed to the inner walls of a tunnel, a mounting frame fixedly connected between the two steel arch frames, and a plurality of reinforcing pipes arranged in the channel formed by the two arc-shaped holes in the same group and communicated with the ends of the two arc-shaped holes, wherein the communicating positions of the two arc-shaped holes are located in the water inrush area; a plurality of water diversion holes are arranged at the center of the back of each reinforcing pipe; water in the water inrush area is introduced into the reinforcing pipe through the water diversion holes and flows out from the two ends of the reinforcing pipe; steel strands are arranged in the reinforcing pipe; a plurality of first grouting pipes are arranged on the mounting frame and arranged in a tilted and crossed mode; the intersection of the first grouting pipes is located between the reinforcing pipe and the inner wall of the tunnel; a plurality of second grouting pipes are arranged on the mounting frame and extend into the deep layer of the inner wall of the tunnel. The water in the water inrush area is guided out through the water diversion holes in the reinforcing pipe, the water pressure is actively reduced, and the water flow is effectively prevented from washing away the concrete slurry.

Description

Technical Field

[0001] This invention relates to the field of tunnel reinforcement technology, and in particular to a tunnel water inrush control device. Background Technology

[0002] During operation, subway tunnels are susceptible to deformation and cracking due to multiple factors, including disturbances in the surrounding strata, the effects of groundwater, and the cyclic load of trains. When cracks penetrate the tunnel wall and connect with the aquifer, they are often accompanied by problems such as water inrush and sand inrush, seriously threatening traffic safety and reducing the service life of the structure.

[0003] Currently, grouting is the most common method for repairing deformation and crack zones in tunnels. However, in the event of a sudden water inrush, the high-pressure water flow continuously erodes the grouting area, causing the concrete grout to be diluted or dispersed before solidification, making it difficult to form an effective reinforced body. Existing technologies typically involve large-scale dewatering of the water inrush area to prevent the grout from being dispersed before solidification. However, large-scale dewatering may trigger ground consolidation and settlement, posing a risk of exacerbating tunnel structural deformation. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a tunnel water inrush control device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A tunnel water inrush control device includes two steel arch frames fixed to the tunnel inner wall, located on both sides of the water inrush area of ​​the tunnel inner wall. An installation frame is fixedly connected between the two steel arch frames. Multiple sets of arc-shaped holes are drilled into the tunnel inner wall from both ends of the installation frame. Each set of arc-shaped holes consists of two holes, and the ends of the two arc-shaped holes in the same set are connected and the connection point is located in the water inrush area. An arch-shaped reinforcement pipe is installed in the channel formed by the two arc-shaped holes. Multiple water inlet holes are provided at the center of the back of the arch of the reinforcement pipe. Water from the water inrush area is introduced into the reinforcement pipe through the water inlet holes and flows out from both ends of the reinforcement pipe. Steel strands are threaded inside the reinforcement pipe. Multiple sets of inclined and intersecting first grouting pipes are provided on the installation frame. The intersection of the first grouting pipes is located between the reinforcement pipe and the tunnel inner wall. Multiple second grouting pipes are provided on the installation frame, and the second grouting pipes extend into the deep layer of the tunnel inner wall.

[0006] Preferably, the mounting frame includes two parallel crossbeams, with both ends of the crossbeams fixed to the steel arch frame, and multiple mounting columns fixedly connected between the two crossbeams. The first grouting pipe and the second grouting pipe are both installed on the mounting columns.

[0007] Preferably, both ends of the reinforcing pipe are provided with first anchors, and both ends of the steel strand are provided with second anchors, and both the first anchors and the second anchors are fixed on the mounting frame.

[0008] Preferably, the reinforcing tube includes two arc-shaped tubes, which are inserted and connected through two arc-shaped holes respectively.

[0009] Preferably, each arc-shaped tube has a through hole on the side facing the inner wall of the tunnel, and a squeezing block is slidably connected in the through hole. In the initial state, the squeezing block is located inside the arc-shaped tube. When the two ends of the steel strand are pulled, the steel strand generates an outward pushing force on the squeezing block, thereby causing the squeezing block to extend to the outside of the through hole.

[0010] The beneficial effects of this invention are as follows: Water from the water inrush area is drained through the water inlet holes on the reinforced pipe, actively reducing water pressure and effectively preventing water flow from eroding the concrete grout. The steel strand tensioning causes the arched reinforced pipe to deform in a directional manner, and in conjunction with the extendable extrusion block, it strongly compacts the loose soil in front, increasing the density of the surrounding rock and the contact area between the reinforced pipe and the soil, providing an excellent foundation for grouting reinforcement. After the concrete solidifies, the steel strands are cut, which is equivalent to the elastic recovery tendency of the reinforced pipe applying prestress to the surrounding reinforced body. This prestress keeps the repaired reinforced body under pressure, effectively resisting the tensile stress caused by subsequent train vibration and ground deformation, effectively inhibiting the reopening of cracks, and significantly improving the load-bearing strength of the repaired structure. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the usage state of the present invention; Figure 2 This is a schematic diagram of the basic structure of the present invention; Figure 3 This is a schematic diagram of the installation structure of the first grouting pipe and the second grouting pipe; Figure 4 This is the state diagram of solid A; Figure 5 This is a schematic diagram of the basic structure of the reinforced pipe; Figure 6 yes Figure 5 Enlarged view of point N. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0013] like Figures 1-6As shown, this embodiment provides a tunnel water inrush control device, including two steel arch frames 1 fixed to the inner wall of the tunnel 100, with the two steel arch frames 1 located on both sides of the water inrush area of ​​the inner wall of the tunnel 100. A mounting frame 2 is fixedly connected between the two steel arch frames 1. The mounting frame 2 includes two parallel crossbeams 21, with both ends of the crossbeams 21 fixed to the steel arch frames 1, and multiple mounting columns 22 fixedly connected between the two crossbeams 21.

[0014] Multiple sets of arc-shaped holes are drilled into the inner wall of tunnel 100 from both ends of the mounting frame 2. Each set of arc-shaped holes consists of two holes. The ends of the two arc-shaped holes in the same set are connected and the connection point is located in the water inrush area, thus forming a complete arc-shaped channel. An arc-shaped reinforcing pipe 3 is installed in the channel formed by the two arc-shaped holes. The reinforcing pipe 3 includes two arc-shaped pipes 30. The two arc-shaped pipes 30 are inserted into the two arc-shaped holes and connected. The arc-shaped holes are drilled using directional drilling technology. The diameter of the arc-shaped holes is larger than the outer diameter of the arc-shaped pipes 30 to facilitate the insertion of the arc-shaped pipes 30. The gap between the arc-shaped pipes 30 and the arc-shaped holes is filled with grout.

[0015] Multiple water inlet holes 32 are provided at the center of the back of the arch of the reinforcing pipe 3. Water from the water inrush area is introduced into the reinforcing pipe 3 through the water inlet holes 32 and flows out from both ends of the reinforcing pipe 3, thereby reducing the water pressure in the water inrush area.

[0016] A steel strand 4 is threaded through the reinforcing pipe 3. Both ends of the reinforcing pipe 3 are provided with a first anchor 31, and both ends of the steel strand 4 are provided with a second anchor 41. Both the first anchor 31 and the second anchor 41 are fixed on the mounting frame 2.

[0017] The mounting column 22 is provided with multiple sets of inclined and intersecting first grouting pipes 5, and the intersection of the first grouting pipes 5 is located in the area between the reinforcing pipe 3 and the inner wall of the tunnel 100. The mounting frame 2 is provided with multiple second grouting pipes 6, which pass through the gap between adjacent reinforcing pipes 3 and extend into the deep layer of the inner wall of the tunnel 100.

[0018] Each arc-shaped tube 30 has a through hole on the side facing the inner wall of the tunnel 100. A compression block 33 is slidably connected inside the through hole. In the initial state, the compression block 33 is located inside the arc-shaped tube 30. When the two ends of the steel strand 4 are pulled, the steel strand 4 generates an outward pushing force on the compression block 33, thereby causing the compression block 33 to extend to the outside of the through hole.

[0019] When using the tunnel water inrush control device provided in this embodiment, steel arch frames 1 are installed on both sides of the water inrush area, and mounting frames 2 are fixed between the steel arch frames 1. The mounting frames 2 are set to fit against the seepage point on the inner wall of the tunnel 100. In this way, the mounting frames 2 can support the water inrush area from the inner wall of the tunnel 100, preventing the entire water inrush area of ​​the tunnel 100 from collapsing during subsequent construction. Then, an arc-shaped hole is drilled at an appropriate position and a reinforcing pipe 3 is inserted, so that the water inlet 32 ​​is aligned with the water inrush point. In this way, the seepage water is discharged along both ends of the reinforcing pipe 3, realizing water drainage and pressure reduction. Then, steel strands 4 are inserted, and tension is applied to both ends of the steel strands 4 simultaneously using tensioning equipment. During tensioning, the bow-shaped part of the reinforcing pipe 3 bends and deforms towards the inner wall of the tunnel 100, gradually squeezing the soil in front that has been loosened by the water flow. During this process, the steel strand 4 exerts a radial thrust on the compression block 33, causing the compression block 33 to extend out of the through hole, increasing the contact area between the reinforcing pipe 3 and the surrounding rock and enhancing the compaction effect, thus significantly improving the density of the loosened soil. In the above process, while the reinforcing pipe 3 deforms and compacts the soil, the compression block 33 is simultaneously triggered to increase the contact area and enhance the compaction effect.

[0020] Maintain the steel strand under tension (4), and inject grout through the first grouting pipe (5). See also... Figure 4 The concrete grout solidifies between the water inrush area and the inner wall of tunnel 100 to form a reinforced body A. This reinforced body A effectively blocks the water inrush channel and prevents water from seeping out from the inner wall of tunnel 100. Then, both ends of the reinforcing pipe 3 are temporarily sealed, and the outer end of the second grouting pipe 6 is left open to drain and depressurize. After the first grouting is stable, a second deep grouting is performed using the second grouting pipe 6. The grout evenly fills the area around the reinforcing pipe 3, the water inrush area, and deep cracks to form an integral reinforced structure. After grouting is completed, both the first grouting pipe 5 and the second grouting pipe 6 remain in the stratum, acting as a skeleton to further improve the shear and bending resistance of the reinforced body.

[0021] After the concrete grout reaches its design strength, both ends of the steel strand 4 are cut, thus removing the constraint of the steel strand 4 from the reinforcing pipe 3. The unconstrained reinforcing pipe 3 undergoes restorative deformation under its own elastic stress, applying continuous compressive stress to the solidified reinforced body, thereby actively establishing prestress in the repair area. Finally, concrete grout is injected into the reinforcing pipe 3 to fill its interior completely.

[0022] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A tunnel water inrush control device, characterized in that: The system includes two steel arch frames (1) fixed to the inner wall of the tunnel (100), with the two steel arch frames (1) located on both sides of the water inrush zone of the inner wall of the tunnel (100). A mounting frame (2) is fixedly connected between the two steel arch frames (1). Multiple sets of arc-shaped holes are drilled from both ends of the mounting frame (2) into the inner wall of the tunnel (100). Each set of arc-shaped holes consists of two holes, and the ends of the two arc-shaped holes in the same set are connected and the connection point is located in the water inrush zone. An arch-shaped reinforcing pipe (3) is installed in the channel formed by the two arc-shaped holes. The middle of the back of the arch of the reinforcing pipe (3) is... Multiple water inlet holes (32) are provided at the core. Water from the water inrush area is introduced into the reinforcement pipe (3) through the water inlet holes (32) and flows out from both ends of the reinforcement pipe (3). Steel strands (4) are threaded through the reinforcement pipe (3). Multiple sets of inclined and intersecting first grouting pipes (5) are provided on the mounting frame (2). The intersection of the first grouting pipes (5) is located between the reinforcement pipe (3) and the inner wall of the tunnel (100). Multiple second grouting pipes (6) are provided on the mounting frame (2). The second grouting pipes (6) extend into the deep layer of the inner wall of the tunnel (100).

2. The tunnel water inrush control device according to claim 1, characterized in that: The mounting frame (2) includes two parallel crossbeams (21), with both ends of the crossbeams (21) fixed to the steel arch frame (1). Multiple mounting columns (22) are fixedly connected between the two crossbeams (21). The first grouting pipe (5) and the second grouting pipe (6) are both installed on the mounting columns (22).

3. The tunnel water inrush control device according to claim 1, characterized in that: The reinforcing pipe (3) is provided with a first anchor (31) at both ends, and the steel strand (4) is provided with a second anchor (41) at both ends. The first anchor (31) and the second anchor (41) are both fixed on the mounting frame (2).

4. The tunnel water inrush control device according to claim 1, characterized in that: The reinforcing tube (3) includes two arc-shaped tubes (30), which are inserted and connected through the two arc-shaped holes respectively.

5. A tunnel water inrush control device according to claim 4, characterized in that: Each of the arc-shaped tubes (30) has a through hole on the side facing the inner wall of the tunnel (100). A compression block (33) is slidably connected in the through hole. In the initial state, the compression block (33) is located inside the arc-shaped tube (30). When the two ends of the steel strand (4) are pulled, the steel strand (4) generates an outward pushing force on the compression block (33), thereby causing the compression block (33) to extend to the outside of the through hole.

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