Grouting reinforcement device for tunnel penetrating through soft soil stratum
By designing a grouting reinforcement device for tunneling through soft soil strata, using the combined structure of the outer and inner grouting pipes and layered grouting technology, the problem of poor grouting effect caused by the downward movement of the slurry in the prior art is solved, and uniform reinforcement of the geological layer and improvement of the grouting effect are achieved.
Patent Information
- Application Number
- CN202420859698.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-04-24
AI Technical Summary
When the tunnel passes through the soft soil strata, in the existing grouting and reinforcement technology, all the slurry moves downward under the action of gravity, resulting in poor geological grouting effect on the upper layer.
A grouting reinforcement device through the soft soil formation was designed, and a combined structure of the outer grouting pipe and the inner grouting pipe was adopted. The inner grouting pipe was slidally connected in the outer grouting pipe. Multiple grouting holes were evenly provided on the pipe wall of the outer grouting pipe, and the layered grouting of the slurry was achieved through structures such as conical covers and reinforcement rings.
Through layered grouting, the slurry is prevented from moving all downward under the action of gravity, which significantly improves the grouting effect of the soft soil strata and ensures uniform reinforcement of the geological layer during the tunnel crossing.
Smart Images
Figure CN222797509U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of grouting reinforcement, in particular to a grouting reinforcement device for a tunnel passing through a soft soil layer. Background Art
[0002] With the rapid development of urban municipal construction and rail transit, the continuous development and utilization of underground space, the effective and developable underground resources are greatly reduced, and gradually begin to restrict and limit the planning and development of cities. Tunnels are engineering buildings buried in the strata, and are a form of human use of underground space. When tunnels pass through soft soil geological layers such as silt, in order to prevent collapse, grouting reinforcement is required in the soft soil layer near the tunnel. In the prior art, ordinary grouting pipes are used for grouting, but the geology of the soft soil layer is relatively loose, and the surface of ordinary grouting pipes is full of grouting holes. After the slurry goes out of the grouting holes, it all moves downward under the action of gravity, resulting in poor geological grouting effect in the upper layer. Utility Model Content
[0003] The purpose of the utility model is to solve the shortcomings existing in the prior art and to propose a grouting reinforcement device for a tunnel passing through a soft soil layer, thereby solving the problems existing in the prior art.
[0004] A grouting reinforcement device for a tunnel passing through a soft soil layer comprises an outer grouting pipe and an inner grouting pipe, wherein the inner grouting pipe is slidably connected inside the outer grouting pipe, and a plurality of grouting holes are evenly arranged on the pipe wall of the outer grouting pipe.
[0005] Furthermore, a conical cover is provided at one end of the outer grouting pipe.
[0006] Furthermore, a conical portion matching the conical cover is provided at one end of the inner grouting pipe, and a grout outlet hole is provided on the conical portion.
[0007] Furthermore, a reinforcing rib ring is provided between the tapered portion and the inner grouting pipe.
[0008] Furthermore, one end of the inner grouting pipe is fixedly connected to a sealing plate, and a slurry inlet pipe is provided on the sealing plate.
[0009] Furthermore, one end of the outer grouting pipe is fixed to the connecting seat, the inner grouting pipe passes through the connecting seat, and a clamp is provided on the connecting seat, and the clamp can clamp the inner grouting pipe in the connecting seat.
[0010] The beneficial effects of the utility model are as follows: after the outer grouting pipe and the inner grouting pipe are inserted to a specified depth in the geological layer, slurry is injected into the inner grouting pipe through the slurry inlet pipe, the slurry enters the outer grouting pipe through the slurry outlet hole, and then the inner grouting pipe is pulled out of the outer grouting pipe in batches, so that layered grouting of the geological layer can be achieved, avoiding the slurry from moving downward under the action of gravity after going out of the grouting hole, and will not cause poor geological grouting effect of the upper layer. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a basic structural schematic diagram of the utility model;
[0012] Figure 2 yes Figure 1 A magnified image of point A;
[0013] Figure 3 yes Figure 1 Working status diagram;
[0014] Figure 4 yes Figure 3 Enlarged view of point C. DETAILED DESCRIPTION
[0015] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0016] like Figure 1-4 As shown, the utility model provides a grouting reinforcement device for a tunnel passing through a soft soil layer, comprising an outer grouting pipe 1 and an inner grouting pipe 2, wherein a plurality of grouting holes 11 are evenly arranged on the wall of the outer grouting pipe 1. A conical cover 10 is arranged at one end of the outer grouting pipe 1. Such a design can make it easier for the outer grouting pipe 1 to be inserted into the soil layer. The inner grouting pipe 2 is slidably connected in the outer grouting pipe 1, and a conical portion 23 matching the conical cover 10 is arranged at one end of the inner grouting pipe 2, and a slurry outlet hole 24 is arranged on the conical portion 23. A sealing plate 21 is fixedly connected to one end of the inner grouting pipe 2, and a slurry inlet pipe 22 is arranged on the sealing plate 21. A reinforcing rib ring 25 is arranged between the conical portion 23 and the inner grouting pipe 2. On the one hand, the strength of the inner grouting pipe 2 can be enhanced by the reinforcing rib ring 25. When the outer grouting pipe 1 is inserted into the soil layer, it is supported by the inner grouting pipe 2, which can prevent the outer grouting pipe 1 from deforming. Therefore, the reinforcing rib ring 25 can also indirectly increase the strength of the inner grouting pipe 2. On the other hand, the inner ring surface of the reinforcing rib ring 25 is set to be conical, and the inner ring surface of the reinforcing rib ring 25 is used for diversion, so that the slurry can flow to the slurry outlet hole 24 during the grouting process.
[0017] During the working process, the inner grouting pipe 2 is first inserted into the deepest part of the outer grouting pipe 1, and then the outer grouting pipe 1 and the inner grouting pipe 2 are inserted into the geological layer together. At this time, the grouting hole 11 on the outer grouting pipe 1 is blocked by the inner grouting pipe 2, so that the soil will not enter from the grouting hole 11 during the insertion into the geological layer, and the outer grouting pipe 1 is prevented from being blocked. After the outer grouting pipe 1 and the inner grouting pipe 2 are inserted into the geological layer together to the specified depth, the slurry is injected into the inner grouting pipe 2 through the slurry inlet pipe 22, and the slurry enters the outer grouting pipe 1 through the slurry outlet hole 24, and then the inner grouting pipe 2 is pulled out of the outer grouting pipe 1 in batches, so that the stratified grouting of the geological layer can be achieved, and the slurry is prevented from moving downward under the action of gravity after going out of the grouting hole, and the geological grouting effect of the upper layer will not be poor.
[0018] In order to temporarily fix the outer grouting pipe 1 and the inner grouting pipe 2, one end of the outer grouting pipe 1 is fixed to the connecting seat 3, and the inner grouting pipe 2 passes through the connecting seat 3. A clamp is provided on the connecting seat 3, and the clamp can clamp the inner grouting pipe 2 in the connecting seat 3. The clamp includes a swivel 4, a circular mounting groove 41 is provided on one side of the swivel 4, the swivel 4 rotates on the outer side of the connecting seat 3, a plurality of sliding holes are provided on one side of the connecting seat 3, a sliding rod 31 is slidably connected in each sliding hole, one end of the sliding rod 31 is fixedly connected to the clamping plate 34, and the other end of the sliding rod 31 is fixedly connected to the stopper 32, a spring 33 is arranged between the stopper 32 and the connecting seat 3, the spring 33 is sleeved on the outer side of the sliding rod 31, and a plurality of protrusions 42 are provided on the side wall of the mounting groove 41. When the swivel 4 rotates, the protrusion 42 will generate an extrusion force on the stopper 32, thereby causing the sliding rod 31 to move toward the inner grouting pipe 2, thereby clamping the grouting pipe 2 through the clamping plate 34, and when the protrusion 42 leaves the stopper 32, the clamping plate 34 leaves the grouting pipe 2 under the action of the elastic force of the spring 33, and at this time, the depth of the inner grouting pipe 2 inserted into the outer grouting pipe 1 can be arbitrarily controlled. At the same time, in order to facilitate taking, a holding rod 33 is fixedly connected to the connecting seat 3, one end of the holding rod 33 is fixedly connected to the anti-dropping block 32, and the outer surface of the holding rod 33 is also provided with a rough surface.
[0019] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A grouting reinforcement device for a tunnel passing through a soft soil layer, characterized in that: It comprises an outer grouting pipe (1) and an inner grouting pipe (2), wherein the inner grouting pipe (2) is slidably connected inside the outer grouting pipe (1), and a plurality of grouting holes (11) are evenly arranged on the pipe wall of the outer grouting pipe (1); The outer grouting pipe (1) is provided with a conical cover (10) at one end; One end of the inner grouting pipe (2) is provided with a conical portion (23) matching the conical cover (10), and a grout outlet hole (24) is provided on the conical portion (23); One end of the inner grouting pipe (2) is fixedly connected to a sealing plate (21), and a grouting pipe (22) is provided on the sealing plate (21).
2. The grouting reinforcement device according to claim 1, characterized in that: A reinforcing rib ring (25) is provided between the tapered portion (23) and the inner grouting pipe (2).
3. The grouting reinforcement device according to claim 1, characterized in that: One end of the outer grouting pipe (1) is fixed to a connecting seat (3), and the inner grouting pipe (2) passes through the connecting seat (3). A clamp is provided on the connecting seat (3), and the clamp can clamp the inner grouting pipe (2) in the connecting seat (3).