Tunnel hole periphery radial drainage device for water-rich high-permeability stratum

Abstract

The utility model provides a tunnel hole periphery radial drainage device for a water-rich high-permeability stratum, relates to a tunnel surrounding rock water drainage technology, and particularly discloses a plurality of drainage holes which are formed in a surrounding mode along the inner wall of the tunnel hole periphery, drainage pipes are installed in the drainage holes, and filtering structures are installed on the outer side walls of the drainage pipes. A plurality of water drainage holes are formed in the outer side wall of the water drainage pipe, a fixing mechanism is installed at one end of the water drainage pipe and used for fixing the water drainage pipe in the water drainage holes, and a water hose communicated with the water drainage pipe is installed at the other end of the water drainage pipe. Silt and impurities are effectively intercepted through the filtering structure of the non-woven fabric sleeve, the water drainage pipe is prevented from being blocked, meanwhile, seepage water is rapidly drained, water pressure in the tunnel is reduced, and structural safety is improved; a fixing mechanism composed of the clamping jaw, the barb and the reset spring can adapt to different hole diameter changes, the long-term stability of the water drain pipe under the complex geological condition is guaranteed, and the maintenance requirement is reduced.

Description

Technical Field

[0001] This utility model relates to the field of tunnel surrounding rock water drainage technology, and more specifically, to a radial drainage device around a tunnel in water-rich, high-permeability strata. Background Technology

[0002] Tunnels, as a crucial component of transportation networks, especially long tunnels in mountainous areas, are of paramount importance for enabling major transportation routes to traverse mountains and valleys. With the rapid development of my country's transportation industry, the areas where tunnels are being built are expanding, and the environments they traverse are becoming increasingly harsh. Tunnels cross vast geological formations with complex groundwater conditions and significant variations in groundwater exposure across different sections. This exposes tunnels to leakage risks, often causing water seepage in the tunnel lining, which seriously affects tunnel operation, reduces its quality and lifespan. Therefore, the quality of drainage and waterproofing projects directly impacts the successful completion and safe operation of tunnel projects; hence, it is necessary to pre-emptively drain or reduce water levels during construction.

[0003] In existing technologies, drainage pipes are often laid between the initial support and the secondary lining to discharge seepage water behind the secondary lining and waterproofing membrane, thereby relieving water pressure and preventing water pressure buildup or lining cracking and seepage. However, most existing drainage pipes are steel pipes wrapped with non-woven fabric, making it impossible to fix them in the drainage tunnel. For drainage pipes buried at large angles, there is a risk of them slipping out of the drainage tunnel after installation. Furthermore, after the drainage pipes discharge water into the tunnel, there is usually no water flow management, allowing water to flow freely into the tunnel, affecting normal construction and making the ground muddy and difficult to pass. Utility Model Content

[0004] The purpose of this utility model is to provide a radial drainage device around a tunnel in water-rich, highly permeable strata, which addresses the shortcomings of existing technologies and solves the problems mentioned in the background.

[0005] The technical solution of this utility model is implemented as follows:

[0006] This utility model provides a radial drainage device for the periphery of a tunnel in a water-rich, high-permeability stratum. It includes a plurality of drainage holes arranged around the inner wall of the tunnel periphery, each drainage hole having a drainage pipe installed inside. A filter structure is installed on the outer wall of the drainage pipe, and the outer wall of the drainage pipe has a plurality of drainage holes. One end of the drainage pipe is fitted with a fixing mechanism for fixing the drainage pipe in the drainage hole. The other end of the drainage pipe is fitted with a water hose connected thereto. It also includes a water collection tank installed inside the tunnel, with the water hose connected to the water collection tank.

[0007] In some technical solutions of this utility model, the filter structure is a cylindrical non-woven fabric sleeve, which is placed on the outer wall of the drain pipe.

[0008] In some technical solutions of this utility model, the fixing mechanism includes an installation cylinder installed on the side of the drain pipe away from the water hose. Several installation grooves are opened around the outer wall of the installation cylinder, and claws are installed in each of the installation grooves. A reset plate is slidably installed inside the installation cylinder. The claws are all connected to the side wall of the reset plate. A reset structure is installed between the reset plate and the bottom wall of the installation cylinder.

[0009] In some technical solutions of this utility model, the pawl is inclinedly disposed on the side wall of the reset plate.

[0010] In some technical solutions of this utility model, the reset structure includes several reset springs, all of which are connected to the reset plate. Several fixing blocks corresponding to the reset springs are installed on the bottom wall of the mounting cylinder, and the fixing blocks are connected to their corresponding reset springs.

[0011] In some technical solutions of this utility model, a barb is rotatably provided on the free end of the chuck, and a torsion spring connected to the chuck is installed on the barb.

[0012] In some technical solutions of this utility model, a drain pipe connected to the bottom of the water collection tank is installed.

[0013] In some technical solutions of this utility model, a water pump is installed between the drain pipe and the water collection tank.

[0014] Compared with existing technologies, this utility model has at least the following advantages or beneficial effects: the non-woven fabric sleeve filter structure effectively intercepts mud and impurities, preventing blockage of the drainage pipe, while ensuring rapid discharge of seepage water, reducing water pressure inside the tunnel, and improving structural safety; the fixing mechanism composed of claws, barbs, and return springs can adapt to different hole diameter changes, ensuring the long-term stability of the drainage pipe under complex geological conditions, reducing maintenance needs, and the barbs, under the action of the torsion spring, enhance the gripping force on the hole wall, while the return spring allows the claws to dynamically adjust the pressure, suitable for dynamic deformation of highly permeable strata; the connection design between the water hose and the water collection tank enables centralized collection and unified discharge of seepage water, and in conjunction with the water pump, the drainage efficiency can be actively controlled to avoid localized waterlogging. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the installation structure of the drain pipe and drain hole in this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of the mounting cylinder in this utility model.

[0018] Figure 4 This is a schematic diagram of the internal structure of the mounting cylinder in this utility model.

[0019] Figure 5 This is a schematic diagram of the installation structure of the claw and barb in this utility model.

[0020] Reference numerals: 1. Barb; 2. Drain pipe; 3. Drain hole; 4. Non-woven fabric sleeve; 5. Water hose; 6. Buckle; 7. Water collection tank; 8. Water pump; 9. Pumping pipe; 10. Drain pipe; 11. Claw; 12. Return spring; 13. Mounting cylinder; 14. Return plate; 15. Torsion spring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0023] Example

[0024] This utility model provides a radial drainage device around a tunnel in water-rich, high-permeability strata, such as... Figures 1-5As shown, the system includes several drainage holes 3 arranged around the inner wall of the tunnel perimeter. These drainage holes 3 can also serve as grouting holes around the tunnel perimeter, reducing the cost of creating them and improving work efficiency. A drilling rig is used to drill holes in the sidewalls to form a corresponding number of drainage holes 3, the number of which is calculated based on the water inflow. Each drainage hole 3 is equipped with a drainage pipe 2, which is made of steel and has good pressure resistance. A filter structure, a cylindrical non-woven fabric sleeve 4, is installed on the outer wall of the drainage pipe 2. Several drainage holes 3 are formed on the outer wall of the drainage pipe 2. Installing the non-woven fabric sleeve-shaped filter structure on the outside of the drainage pipe 2 effectively intercepts mud and impurities, preventing blockage and ensuring rapid drainage of seepage, reducing water pressure inside the tunnel and improving structural safety. Furthermore, the non-woven fabric perfectly fills the gap between the drainage pipe 2 and the drainage hole 3, increasing the friction between them and preventing the drainage pipe 2 from slipping out of the drainage hole 3 and failing to achieve its drainage effect. A fixing mechanism is installed at one end of the drainage pipe 2 to secure it within the drainage hole 3. This mechanism can adapt to different hole diameters, ensuring the long-term stability of the drainage pipe 2 under complex geological conditions and reducing maintenance requirements. The other end of the drainage pipe 2 is connected to a water hose 5 and a water collection tank 7 installed inside the tunnel. The water hose 5 is inserted into the water collection tank 7, and the two are connected. This connection between the water hose 5 and the water collection tank 7 enables centralized collection and unified discharge of seepage water.

[0025] Preferably, the water hose 5 is a flexible pipe. The water hose 5 is fixed to the outer wall of the drain pipe 2 by a clamp structure or a buckle 6.

[0026] In some technical solutions of this utility model, the fixing mechanism includes an installation cylinder 13 installed on the side of the drain pipe 2 away from the water hose 5. The installation cylinder 13 is welded to the end of the drain pipe 2, so that the drain pipe 2 is in a state of being closed at one end and open at the other, allowing the seepage water entering the drain pipe 2 to flow unidirectionally into the water hose 5. Several installation grooves are formed around the outer wall of the installation cylinder 13, and the installation grooves are rectangular through grooves. Each installation groove is equipped with a claw 11. A reset plate 14 is slidably installed inside the installation cylinder 13. The reset plate 14 is disc-shaped, and its outer diameter is adapted to the inner diameter of the installation cylinder 13. The claws 11 are fixedly connected to the side wall of the reset plate 14 by welding. A reset structure is installed between the reset plate 14 and the bottom wall of the installation cylinder 13. The reset structure includes several reset springs 12, each connected to a reset plate 14. Several fixing blocks, corresponding one-to-one with each reset spring 12, are installed on the bottom wall of the mounting cylinder 13. These fixing blocks are welded to the bottom wall of the mounting cylinder 13 and connected to their corresponding reset springs 12, thus limiting the movement of the reset springs 12.

[0027] In some technical solutions of this utility model, the claw 11 is inclinedly disposed on the side wall of the reset plate 14. By designing the claw 11 in an inclined manner, the activity space of the claw 11 can be increased to accommodate drain holes 3 of different sizes.

[0028] In some technical solutions of this utility model, a barb 1 is rotatably provided on the free end of the claw 11, and a torsion spring 15 connected to the claw 11 is installed on the barb 1. The barb 1 can rotate through the torsion spring 15. When entering the hole, under the pressure of the wall, the rotation axis between the claw 11 and the barb 1 can rotate and shrink to adapt to the size of the drain hole 3.

[0029] During installation, the clamping claw 11 of the fixing mechanism is compressed and retracts into the mounting cylinder 13, compressing the return spring 12 and storing corresponding elastic potential energy. When the drain pipe 2 is in place, the return spring 12 pushes the return plate 14 outward, causing the clamping claw 11 and the barb 1 to unfold. The barb 1 embeds into the inner wall of the drain hole 3, forming multi-point anchoring. If the stratum undergoes slight deformation, the torsion spring 15 allows the barb 1 to adaptively adjust its angle to maintain gripping force; the return spring 12 buffers external pressure fluctuations to prevent the drain pipe 2 from loosening and falling out of the drain hole 3.

[0030] In some technical solutions of this utility model, a drain pipe 10 connected to the bottom of the water collection tank 7 is installed. A water pump 8 is installed between the drain pipe 10 and the water collection tank 7. Preferably, the water pump 8 is inserted into the water collection tank 7 through a water pumping pipe 9 and connected to the water collection tank 7. When the seepage water in the water collection tank 7 reaches a certain volume, the water pump 8 is started. The water pump 8 can actively drain the water in the water collection tank 7, and the water pump 8 can control the drainage efficiency to avoid local water accumulation. The combination of the water pump 8 and the water collection tank 7 can flexibly adjust the drainage intensity according to hydrological conditions to avoid passively relying on gravity drainage.

[0031] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A radial drainage device around a tunnel in a water-rich, high-permeability stratum, characterized in that, The system includes several drainage holes (3) arranged around the inner wall of the tunnel, each drainage hole (3) is equipped with a drainage pipe (2), the outer wall of the drainage pipe (2) is equipped with a filter structure, the outer wall of the drainage pipe (2) is provided with several drainage holes (3), one end of the drainage pipe (2) is equipped with a fixing mechanism, the fixing mechanism is used to fix the drainage pipe (2) in the drainage hole (3), the other end of the drainage pipe (2) is equipped with a water hose (5) connected to it, and also includes a water collection tank (7) installed in the tunnel, the water hose (5) is connected to the water collection tank (7).

2. The radial drainage device around a tunnel in a water-rich, high-permeability stratum according to claim 1, characterized in that, The filter structure is a cylindrical non-woven fabric sleeve (4), which is located on the outer wall of the drain pipe (2).

3. A radial drainage device around a tunnel in a water-rich, high-permeability stratum according to claim 1 or 2, characterized in that, The fixing mechanism includes an installation cylinder (13) installed on the side of the drain pipe (2) away from the water hose (5). A plurality of installation grooves are provided around the outer side wall of the installation cylinder (13). Each installation groove is equipped with a claw (11). A reset plate (14) is slidably provided inside the installation cylinder (13). Each claw (11) is connected to the side wall of the reset plate (14). A reset structure is installed between the reset plate (14) and the bottom wall of the installation cylinder (13).

4. A radial drainage device around a tunnel in a water-rich, high-permeability stratum according to claim 3, characterized in that, The claw (11) is inclinedly disposed on the side wall of the reset plate (14).

5. A radial drainage device around a tunnel in a water-rich, high-permeability stratum according to claim 3, characterized in that, The reset structure includes several reset springs (12), each of which is connected to the reset plate (14). The bottom wall of the mounting cylinder (13) is equipped with several fixing blocks that correspond one-to-one with the reset springs (12), and each fixing block is connected to its corresponding reset spring (12).

6. A radial drainage device around a tunnel in a water-rich, high-permeability stratum according to claim 3, characterized in that, The free end of the chuck (11) is provided with a barb (1), and a torsion spring (15) connected to the chuck (1) is installed on the barb (1).

7. A radial drainage device around a tunnel in a water-rich, high-permeability stratum according to claim 1, characterized in that, The bottom of the water collection tank (7) is equipped with a drain pipe (10) that is connected to it.

8. A radial drainage device around a tunnel in a water-rich, high-permeability stratum according to claim 7, characterized in that, A water pump (8) is installed between the drain pipe (10) and the water collection tank (7).

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