Crystallization blockage disposal system for tunnel drainage system

Abstract

The invention discloses a crystallization blockage disposal system for a tunnel drainage system. The crystallization blockage disposal system comprises a drainage blind pipe, geotechnical cloth, a waterproof plate, a dissolving solution injection mechanism and a drainage mechanism. The drainage blind pipe is arranged between the primary support concrete and the secondary lining concrete and is used for discharging seepage water in the surrounding rock and the primary support concrete; the geotechnical cloth and the waterproof plate are arranged between the drainage blind pipe and the secondary lining concrete, and the drainage blind pipe is communicated with the geotechnical cloth; and the dissolving solution injection mechanism is communicated with the drainage blind pipe and is used for injecting a dissolving solution into the drainage blind pipe so as to dissolve crystals attached to the drainage blind pipe and the geotechnical cloth. The dissolving solution is injected into the drainage blind pipe through the dissolving solution injection mechanism, the dissolving solution reacts with crystals attached to the geotechnical cloth and the drainage blind pipe, the problem that the geotechnical cloth and the drainage blind pipe are blocked due to crystallization is solved, and crystallization blocking of the tunnel drainage system is treated from the drainage pipe; and the overall functionality of the water-rich mountain tunnel drainage system is obviously improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel drainage systems, and in particular relates to a crystallization blockage disposal system for a tunnel drainage system. Background Art

[0002] In mountain tunnels, in order to prevent water from the surface and surrounding rock from infiltrating into the tunnel's internal operating environment, a series of drainage systems are usually set up on the outside of the tunnel lining, including geotextiles and annular drainage blind pipes, longitudinal drainage pipes, inspection wells, drainage side ditches, central drainage ditches, etc. The design of these traditional drainage structures can meet the drainage needs during tunnel construction and operation under normal conditions. However, in recent years, according to research, in water-rich strata, as groundwater passes through the surrounding rock and primary lining concrete, crystals will precipitate and adsorb on the drainage system pipe wall during the process of flowing through the drainage system. The accumulation of crystals will lead to blockage of the drainage pipe. Therefore, even if many tunnels are equipped with the above drainage systems, there is still serious water accumulation on the outside of the tunnel lining. In severe cases, it may even cause structural cracks and tunnel leakage, seriously affecting normal operation. The originally designed drainage system cannot fully drain water to achieve the original design purpose.

[0003] The formation mechanism of crystals in the drainage system of mountain tunnels is mainly that the groundwater dissolves and draws out the calcium ion compounds in the surrounding rock and primary concrete lining during the process of passing through the surrounding rock and primary concrete lining. As the water flows through the drainage system, the calcium ion compounds are precipitated in the drainage system again, and then gradually block the drainage system. For the traditional drainage system, the first drainage structures that come into contact with calcium ion water are geotextiles and drainage blind pipes. Once the geotextiles and drainage blind pipes are blocked, the drainage system in the surrounding rock will fail, leading to a series of subsequent structural and operational problems. Summary of the invention

[0004] The purpose of the present invention is to provide a tunnel drainage system crystal blockage disposal system to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides a system for treating crystallization blockage of a tunnel drainage system. The top of the tunnel is provided with surrounding rock, primary support concrete and secondary lining concrete in sequence from the outside to the inside, and the secondary lining concrete is provided on one side close to the tunnel space; the system for treating crystallization blockage of a tunnel drainage system comprises:

[0006] A drainage blind pipe, which is arranged between the primary support concrete and the secondary lining concrete and is used to discharge seepage water in the surrounding rock and the primary support concrete;

[0007] A geotextile and a waterproof sheet, wherein the geotextile and the waterproof sheet are arranged between the drainage blind pipe and the secondary lining concrete, and the drainage blind pipe and the geotextile are in conduction;

[0008] A dissolving liquid injection mechanism, the dissolving liquid injection mechanism is in communication with the drainage blind pipe and is used to inject dissolving liquid into the drainage blind pipe to dissolve crystals attached to the drainage blind pipe and the geotextile;

[0009] A drainage mechanism is connected to and communicated with the drainage blind pipe, and is used to discharge the seepage water and dissolved liquid in the drainage blind pipe.

[0010] Optionally, the dissolving liquid injection mechanism comprises:

[0011] A pre-buried part, which is fixedly connected and conducted with the drainage blind pipe, and is arranged above the tunnel;

[0012] An injection part or a plugging part, one end of the embedded part passes through the second lining concrete and is detachably connected to the injection part or the plugging part, the injection part is used to supply a dissolving liquid to the embedded part, and the plugging part is used to plug the embedded part.

[0013] Optionally, the embedded part includes:

[0014] a first drainage pipe, wherein the first drainage pipe is arranged in the drainage blind pipe;

[0015] A first injection pipe is fixedly connected to and communicated with the first drainage pipe, and the first injection pipe penetrates through the second lining concrete and is detachably connected to the injection part or the blocking part.

[0016] Optionally, one-way blocking covers are provided at both ends of the first drain pipe, and the one-way blocking covers have two states, namely a closed state and an open state:

[0017] When the one-way blocking cover is in a closed state, the first drainage pipe is not connected to the drainage blind pipe, and the seepage water in the surrounding rock and the primary support concrete cannot enter the first drainage pipe;

[0018] When the one-way blocking cover is in the open state, the first drain pipe is connected to the drainage blind pipe, and the dissolved liquid enters the drainage blind pipe from the first drain pipe;

[0019] Among them, when the liquid pressure in the first drain pipe is greater than a first threshold, the one-way sealing cover switches from a closed state to an open state; when the liquid pressure in the first drain pipe is less than a second threshold, the one-way sealing cover switches from an open state to a closed state.

[0020] Optionally, the end of the first drain pipe is rotatably connected to the one-way sealing cover, and a connecting assembly is provided between the first drain pipe and the one-way sealing cover, and the connecting assembly is used to apply a pulling force to the one-way sealing cover, and the first drain pipe and the one-way sealing cover are in a closed state under the action of the pulling force.

[0021] Optionally, the connecting assembly includes corresponding built-in iron sheets and magnetic blocks, the built-in iron sheet is fixedly arranged on a side of the one-way blocking cover facing the first drain pipe, and the magnetic block is fixedly arranged inside the first drain pipe.

[0022] Optionally, the injection portion comprises:

[0023] An injection pipe body, the injection pipe body is detachably connected and communicated with the embedded part;

[0024] The dissolving liquid injection tube is fixedly connected to and communicated with the injection tube body, and is used for supplying the dissolving liquid to the injection tube body.

[0025] Optionally, the dissolving liquid injection tube is arranged on a side of the injection tube body close to the embedded part, and a piston pushing rod is slidably connected inside one end of the injection tube body away from the embedded part.

[0026] Optionally, the injection tube body is fixedly connected and communicated with a slag discharge pipe, the piston push rod and the slag discharge pipe are respectively arranged at two ends of the injection tube body, the injection tube body is connected and communicated with a connecting pipe between the slag discharge pipe and the piston push rod, and the connecting pipe is detachably connected and communicated with the embedded part.

[0027] Optionally, a flow control valve is provided on the dissolving solution injection tube.

[0028] Compared with the prior art, the present invention has the following advantages and technical effects:

[0029] The present invention provides a system for dealing with crystallization blockage of a tunnel drainage system. The waterproof board in the present application separates the geotextile and the structure above it from the secondary lining concrete, while preventing seepage water from flowing into the secondary lining concrete and affecting the normal operation of the tunnel. The present invention injects a dissolving liquid into the drainage blind pipe through a dissolving liquid injection mechanism. The dissolving liquid reacts with the crystals attached to the geotextile and the drainage blind pipe, so that the crystals are dissolved and discharged from the tunnel through the drainage blind pipe and the drainage mechanism together with the seepage water from the surrounding rock and the primary support concrete, thereby solving the problem of blockage of the geotextile and the drainage blind pipe caused by crystallization, and treating the crystallization blockage of the tunnel drainage system starting from the drainage pipe, which significantly improves the overall functionality of the drainage system of the water-rich mountain tunnel and can significantly reduce a series of diseases caused by crystallization blockage in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the structure of the tunnel drainage system of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the tunnel drainage system of the present invention from another perspective;

[0033] Figure 3 It is a schematic diagram of the structure of the embedded part of the present invention;

[0034] Figure 4 This is a schematic diagram of the injection part structure of the present invention;

[0035] Figure 5 This is another schematic diagram of the injection part structure of the present invention;

[0036] Figure 6 This is another schematic diagram of the injection part structure of the present invention;

[0037] Among them, 1. Annular drainage blind pipe; 2. Waterproof board; 3. Geotextile; 4. Tunnel pavement; 5. Central drainage ditch; 6. Horizontal drainage pipe; 7. Second lining concrete; 8. Longitudinal drainage pipe; 11. First drainage pipe; 12. First injection pipe; 13. One-way blocking cover; 14. Built-in iron sheet; 15. Magnetic block; 16. Built-in thread; 21. Injection pipe body; 22. Dissolved liquid injection pipe; 23. Piston push rod; 24. Slag discharge pipe; 25. Connecting pipe; 26. External thread; 27. Flow control valve. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0039] like Figures 1 to 6 As shown, the present invention provides a tunnel drainage system crystal blockage treatment system, the tunnel top is sequentially provided with surrounding rock, primary support concrete and secondary lining concrete 7 from outside to inside, and the secondary lining concrete 7 is arranged on one side close to the tunnel space. The tunnel drainage system crystal blockage treatment system includes a drainage blind pipe 1, a geotextile 3, a waterproof board 2, a dissolving liquid injection mechanism and a drainage mechanism.

[0040] Among them, the drainage blind pipe 1 is arranged between the primary support concrete and the secondary lining concrete 7, and is used to discharge the seepage water in the surrounding rock and the primary support concrete; the surface of the drainage blind pipe 1 has many tiny holes, and the seepage water in the surrounding rock and the primary support concrete enters the drainage blind pipe 1 through the holes, and the seepage water on the top of the tunnel is discharged through the drainage blind pipe 1. The drainage blind pipe is mainly made of synthetic fiber, plastic and synthetic rubber, etc., and is made into various types of multifunctional geotechnical products through different process methods. Its material is hydrophobic and has low resistance. It has extremely high surface water permeability and internal water permeability; it also has excellent compressive resistance and the ability to adapt to deformation; it has excellent chemical inertness and can maintain a long service life in geotechnical engineering use; the blind pipe is a prior art and will not be repeated here. The number of drainage blind pipes 1 in the present invention is designed according to the actual situation of the tunnel, and the number of drainage blind pipes 1 can be kept consistent with the number of primary supports of the tunnel, that is, a drainage blind pipe 1 is set along the longitudinal direction of the tunnel every 2 meters to 4 meters. The top of the tunnel in this embodiment is an arc-shaped structure, so the drainage blind pipe 1 in this application is also an annular drainage blind pipe, so as to adapt to the top structure of the tunnel. It should be noted that the drainage blind pipe 1 in this application is not limited to annular arrangement, but can also be arranged according to the structure of the tunnel and actual needs.

[0041] The geotextile 3 and the waterproof board 2 are arranged between the drainage blind pipe 1 and the secondary lining concrete 7, and the drainage blind pipe 1 and the geotextile 3 are in conduction; the waterproof board 2 in the present application separates the geotextile 3 and the structure above it (geotextile 3, drainage blind pipe 1, surrounding rock and primary support concrete) from the secondary lining concrete 7, and the waterproof board prevents seepage water from flowing into the secondary lining concrete and affecting the normal operation of the tunnel. The drainage mechanism is connected and conducted with the drainage blind pipe 1, and the drainage mechanism is used to discharge the seepage water and dissolved liquid in the drainage blind pipe 1. Due to the presence of the waterproof board 2, the seepage water in the surrounding rock and the primary support concrete will gather on the geotextile 3 and above it. Since the drainage blind pipe 1 and the geotextile 3 are in conduction, the seepage water enters the drainage blind pipe 1 through the holes on the wall of the drainage blind pipe 1, and the seepage water entering the drainage blind pipe 1 is discharged from the tunnel through the drainage mechanism.

[0042] The dissolving liquid used in this application is an acidic dissolving liquid. In the treatment of crystals in mountain tunnels, experiments have shown that some acid solutions have a good effect on the dissolution of crystals. It is a prior art that acidic dissolving liquids can dissolve crystals in tunnels. This application is mainly for protecting the crystal blockage treatment system of the tunnel drainage system. What is protected is the structure, and the types of dissolving liquids will not be elaborated here.

[0043] The dissolving liquid injection mechanism is connected to the drainage blind pipe 1, and is used to inject dissolving liquid into the drainage blind pipe 1 to dissolve the crystals attached to the drainage blind pipe 1 and the geotextile 3. The present invention injects dissolving liquid into the drainage blind pipe 1 through the dissolving liquid injection mechanism. After the dissolving liquid enters the drainage blind pipe 1, due to the presence of many tiny holes in the wall of the drainage blind pipe 1, the dissolving liquid will pass through the wall of the drainage blind pipe 1 and enter the geotextile 3. The dissolving liquid reacts with the crystals attached to the geotextile 3 and the drainage blind pipe 1 to dissolve the crystals, which are discharged together with the seepage water from the surrounding rock and the primary support concrete, thereby solving the problem of blockage of the geotextile and the drainage blind pipe caused by crystallization, and treating the crystal blockage of the tunnel drainage system starting from the drainage blind pipe 1 and the geotextile 3, which significantly improves the overall functionality of the drainage system of the water-rich mountain tunnel, and can significantly reduce a series of diseases caused by crystal blockage in the later stage.

[0044] Further optimization scheme, the dissolving liquid injection mechanism includes a pre-embedded part, an injection part or a plugging part. The pre-embedded part is arranged above the tunnel, and the pre-embedded part needs to be connected and fixed during the tunnel construction. The pre-embedded part is fixedly connected to the secondary lining concrete 7. The pre-embedded part is a concealed project and accompanies the entire life cycle of the tunnel. Among them, the pre-embedded part is fixedly connected and conducted with the drainage blind pipe 1, one end of the pre-embedded part passes through the secondary lining concrete 7 and is detachably connected with the injection part or the plugging part, the injection part is used to supply the dissolving liquid to the pre-embedded part, and the plugging part is used to plug the pre-embedded part.

[0045] When the tunnel is in normal use, the plugging part is installed and connected with the embedded part, and the embedded part is blocked by the plugging part to prevent the seepage in the surrounding rock and the primary support concrete from entering the tunnel through the drainage blind pipe 1 and the embedded part, affecting the normal operation of the tunnel. When it is necessary to clean the crystals attached to the drainage blind pipe 1 and the geotextile 3, the dissolving liquid is supplied to the embedded part through the injection part, and the dissolving liquid enters the drainage blind pipe 1 through the embedded part. Since there are many tiny holes in the wall of the drainage blind pipe 1, the dissolving liquid will pass through the wall of the drainage blind pipe 1 and enter the geotextile 3. The dissolving liquid reacts with the crystals attached to the geotextile and the drainage blind pipe, and the crystals dissolve. After the reaction is completed, the dissolving liquid and the seepage water are discharged from the tunnel through the drainage blind pipe 1 and the drainage mechanism.

[0046] Preferably, the embedded part is arranged at the center top of the tunnel, that is, above the highest point of the tunnel space, and the dissolving liquid can be provided to both sides of an annular drainage blind pipe through one embedded part, and when the dissolving liquid flows from the highest point of the drainage blind pipe 1 to both sides, the dissolving liquid will enter the geotextile 3 through the drainage blind pipe 1 under the action of gravity and the pressure of the dissolving liquid injected by the injection part, and the dissolving effect on the crystals on the geotextile 3 will be better. The present invention starts from the top of the tunnel drainage system and disposes of the crystals in the drainage system from top to bottom to achieve the purpose of unblocking the tunnel drainage system; and the embedded part is arranged at the center top of the tunnel, which is easy to operate and convenient for later maintenance.

[0047] Of course, two or more pre-embedded parts may be arranged on one drainage blind pipe 1, and the multiple pre-embedded parts may be arranged at different positions of the drainage blind pipe 1, and the dissolving liquid may be injected into the drainage blind pipe 1 through the cooperation of the multiple pre-embedded parts and the injection parts.

[0048] Preferably, the embedded part includes a first drainage pipe 11 and a first injection pipe 12, wherein the first drainage pipe 11 is arranged in the drainage blind pipe 1; the first injection pipe 12 is fixedly connected and conducted with the first drainage pipe 11, and the first injection pipe 12 is detachably connected with the injection part or the plugging part after passing through the second lining concrete 7. The first drainage pipe 11 and the first injection pipe 12 are respectively fixed on the steel cage in the second lining concrete 7 by a tie or a wire. During installation, the first drainage pipe 11 is arranged in the drainage blind pipe 1, a hole is opened on the drainage blind pipe 1, and the first injection pipe 12 is passed through the hole and extends out of the drainage blind pipe 1, and the drainage blind pipe 1 and the first injection pipe 12 are fixedly connected by hot melt adhesive, and the interface between the drainage blind pipe 1 and the first injection pipe 12 is sealed tightly with hot melt acid-resistant waterproof adhesive to prevent water seepage from flowing into the tunnel between the drainage blind pipe 1 and the first drainage pipe 11 and between the drainage blind pipe 1 and the first injection pipe 12, thereby affecting the normal operation of the tunnel.

[0049] Of course, the embedded part can also be in another form. The embedded part includes a T-shaped tee, and a PVC straight pipe is connected to each of the three outlets of the T-shaped tee. The diameter of the PVC straight pipe is smaller than the diameter of the drainage blind pipe 1. The horizontal part of the T-shaped tee and the two PVC straight pipes connected to the horizontal part constitute the first drainage pipe 11, and the vertical part of the T-shaped tee and the PVC straight pipe connected to the vertical part constitute the first injection pipe 12. In this form, when a pre-embedded part is arranged on a drainage blind pipe 1, the drainage blind pipe 1 can be a split structure, that is, the drainage blind pipe 1 is divided into two left and right parts. During installation, the two drainage blind pipes 1 are respectively sleeved on the two PVC straight pipes connected to the horizontal part of the T-shaped tee, and are fixedly connected by hot melt adhesive, and the interface between the drainage blind pipe 1 and the first injection pipe 12 is sealed tightly with hot melt acid-resistant waterproof glue. Prevent water seepage from flowing into the tunnel between the drainage blind pipe 1 and the first drainage pipe 11 and between the drainage blind pipe 1 and the first injection pipe 12, affecting the normal operation of the tunnel.

[0050] Further optimizing the solution, one-way blocking covers 13 are provided at both ends of the first drain pipe 11, and the one-way blocking covers 13 have two states, namely, a closed state and an open state:

[0051] When the one-way blocking cover 13 is in the closed state, the first drainage pipe 11 is not connected to the drainage blind pipe 1, and the seepage water in the surrounding rock and the primary support concrete cannot enter the first drainage pipe 11; in the closed state, the one-way blocking cover 13 is tightly fitted with the first drainage pipe 11, and the seepage water cannot enter the first drainage pipe 11, that is, the seepage water cannot enter the entire solution injection mechanism. At the same time, when the tunnel is in normal use, the blocking part is installed and connected to the first injection pipe 12, and the embedded part is blocked by the blocking part to prevent the seepage water in the surrounding rock and the primary support concrete from entering the tunnel through the drainage blind pipe 1 and the embedded part. The present invention prevents the seepage water from entering the tunnel and affecting the normal operation of the tunnel through the one-way blocking cover 13, the first drainage pipe 11, the first injection pipe 12 and the blocking part.

[0052] When the one-way blocking cover 13 is in the open state, the first drain pipe 11 is connected to the drainage blind pipe 1, and the dissolved liquid enters the drainage blind pipe 1 from the first drain pipe 11, and the dissolved liquid is injected into the first injection pipe 12 through the injection part, and then enters the first drain pipe 11 and then the drainage blind pipe 1. Since there are many tiny holes in the wall of the drainage blind pipe 1, the dissolved liquid will pass through the wall of the drainage blind pipe 1 and enter the geotextile 3, and the dissolved liquid reacts with the crystals attached to the geotextile and the drainage blind pipe to dissolve the crystals.

[0053] Among them, when the liquid pressure in the first drain pipe 11 is greater than the first threshold value, the one-way sealing cover 13 switches from a closed state to an open state; this state transition occurs in the process of injecting the dissolved liquid into the pre-buried part through the injection part. During the process of injecting the dissolved liquid into the pre-buried part by the injection part, when the pressure of the dissolved liquid in the first drain pipe 11 is greater than the first threshold value, the one-way sealing cover 13 switches from a closed state to an open state, and the dissolved liquid injection mechanism starts to inject the dissolved liquid into the drainage blind pipe 1.

[0054] When the pressure of the liquid in the first drain pipe 11 is less than the second threshold, the one-way blocking cover 13 switches from the open state to the closed state; this state conversion occurs in the process of stopping the injection of the dissolving liquid into the embedded part through the injection part, and no more dissolving liquid enters the embedded part from the injection part. When the pressure of the dissolving liquid in the first drain pipe 11 is less than the second threshold, the one-way blocking cover 13 switches from the open state to the closed state, completing the injection of the dissolving liquid. In this embodiment, the one-way blocking cover 13 can be switched from the open state to the closed state under the action of its own gravity, or by a separately arranged structure such as a cylinder or hydraulic cylinder, or by the connection assembly described below.

[0055] During the tunnel construction process, the first drainage pipe 11 and the first injection pipe 12 are fixed to the steel cage in the secondary lining concrete 7 by cable ties or wires. After the installation is completed, before pouring the secondary lining concrete 7, it is necessary to check whether each one-way sealing cover 13 and the sealing part are in a closed state to prevent concrete from pouring into the embedded part. The sealing part should be tightly fitted with the secondary lining concrete template. The sealing part can be fixed to the steel cage inside the secondary lining concrete 7 by cable ties or wires to prevent the sealing part from being unable to be found after the secondary lining concrete construction is completed and the sealing part is offset during the construction process. Moreover, as a concealed project, the embedded part accompanies the entire life cycle of the tunnel. After the installation is completed, before and during the construction of the next process, attention must be paid to the protection of the finished product, and strict attention must be paid to the closing state of the embedded part and whether the pipeline position is correct.

[0056] Further optimized solution, the end of the first drain pipe 11 is rotatably connected to the one-way blocking cover 13, and a connecting component is provided between the first drain pipe 11 and the one-way blocking cover 13, and the connecting component is used to apply a pulling force to the one-way blocking cover, and the first drain pipe 11 and the one-way blocking cover 13 are in a closed state under the action of the pulling force. When the liquid pressure in the first drain pipe 11 is greater than the opening critical value (i.e., the first threshold value) of the pulling force applied by the connecting component, the one-way blocking cover 13 switches from the closed state to the open state; when the liquid pressure in the first drain pipe 11 is less than the closing critical value (i.e., the second threshold value) of the pulling force inside the connecting component, the one-way blocking cover 13 switches from the open state to the closed state; in the present invention, the opening critical value and the closing critical value of the pulling force inside the connecting component may be the same or different, depending on the type of the connecting component.

[0057] In this embodiment, the connection component includes a corresponding built-in iron sheet 14 and a magnetic block 15. The built-in iron sheet 14 is fixedly arranged on the side of the one-way blocking cover 13 facing the first drain pipe 11, and the magnetic block 15 is fixedly arranged inside the first drain pipe 11. The attraction between the built-in iron sheet 14 and the magnetic block 15 is used as the pulling force to keep the first drain pipe 11 and the one-way blocking cover 13 in a closed state. When the liquid pressure in the first drain pipe 11 is greater than the attraction between the built-in iron sheet 14 and the magnetic block 15, the one-way blocking cover 13 switches from a closed state to an open state. The connection component in this embodiment has a simple structure and a fast response speed.

[0058] Of course, the connection component can also be a spring, and the two ends of the spring are respectively fixed to the side of the one-way blocking cover 13 facing the first drain pipe 11 and the inside of the first drain pipe 11, and the tension of the spring is used as the pulling force to keep the first drain pipe 11 and the one-way blocking cover 13 in a closed state. When the liquid pressure in the first drain pipe 11 is greater than the tension of the spring, the one-way blocking cover 13 switches from the closed state to the open state.

[0059] Reference Figure 4The injection part includes an injection tube body 21 and a solution injection tube 22. The injection tube body 21 is detachably connected and communicated with the embedded part; the solution injection tube 22 is fixedly connected and communicated with the injection tube body 21, and is used to supply the solution to the injection tube body 21. A flow control valve 27 is provided on the solution injection tube 22.

[0060] This structure is a specific structure of the first injection part, which is suitable for the case where the external water pressure of the tunnel lining is large. The solution injection pipe 22 is connected to a solution injection pump, and the external solution is pumped into the solution injection pipe 22 and the injection pipe body 21 by the solution injection pump to realize the injection of the solution. After the solution injection process is completed, the flow control valve 27 needs to be closed to prevent the solution from flowing back, so as to achieve the effect of efficiently unblocking the drainage system. Considering that the solution and the crystals attached to the geotextile 3 and the drainage blind pipe 1 require a certain reaction time, the solution injection process needs to control the injection amount and injection rate according to the actual situation. The present invention controls the injection rate and injection amount of the solution injection process through the flow control valve 27.

[0061] Reference Figure 5 The injection part includes an injection tube body 21 and a dissolving liquid injection tube 22. The injection tube body 21 is detachably connected and communicated with the embedded part; the dissolving liquid injection tube 22 is fixedly connected and conducted with the injection tube body 21, and is used to supply the dissolving liquid to the injection tube body 21. The dissolving liquid injection tube 22 is arranged on a side of the injection tube body 21 close to the embedded part, and a piston pushing rod 23 is slidably connected inside the end of the injection tube body 21 away from the embedded part; a flow control valve 27 is arranged on the dissolving liquid injection tube 22.

[0062] This structure is the specific structure of the second injection part. This structure is suitable for the case where the water pressure outside the tunnel lining is not large. This situation is also suitable for the case where the demand for the dissolving liquid is small. The dissolving liquid inside the injection tube body 21 is injected into the pre-buried part through the piston push rod 23. The specific use process of this structure is: step one, open the flow control valve 27, pull the piston push rod 23, so that a space for retaining the dissolving liquid is generated inside the injection tube body 21; step two, inject the dissolving liquid into the space for retaining the dissolving liquid inside the injection tube body 21 through the dissolving liquid injection pipe 22; step three, close the flow control valve 27, push the piston push rod 23, and inject the dissolving liquid inside the injection tube body 21 into the pre-buried part. After the reaction is completed, repeat the previous steps according to actual needs to achieve the purpose of gradually dissolving and clearing the blockage. The present invention controls the injection rate and injection amount of the dissolving liquid injection process through the flow control valve 27.

[0063] Reference Figure 6The injection part includes an injection tube body 21, a solution injection tube 22, a piston push rod 23, a slag discharge tube 24 and a connecting tube 25. The solution injection tube 22 is fixedly connected and conducted with the injection tube body 21, and is used to supply the solution to the injection tube body 21. The solution injection tube 22 is arranged on a side of the injection tube body 21 close to the embedded part, that is, close to the connecting tube 25. The piston push rod 23 is slidably connected inside an end of the injection tube body 21 away from the embedded part. The slag discharge tube 24 is fixedly connected and communicated with the injection tube body 21. The piston push rod 23 and the slag discharge tube 24 are respectively arranged at both ends of the injection tube body 21. The connecting tube 25 is connected and communicated with the injection tube body 21 and is arranged between the slag discharge tube 24 and the piston push rod 23. The connecting tube 25 is detachably connected and conducted with the embedded part. The solution injection tube 22 and the slag discharge tube 24 are both provided with flow control valves 27.

[0064] This structure is a specific structure of the third injection part, which is suitable for the case where the external water pressure of the tunnel lining is not large and there are insoluble sediments such as stones and hard particles in the drainage blind pipe 1. This situation is also suitable for the case where the demand for dissolving liquid is small. When using the second injection part, if it is found that it is difficult to pull the piston to push the rod 23, or there are many insoluble sediments such as stones and hard particles in the drainage mechanism, or the drainage blind pipe 1 or the drainage mechanism has poor drainage conditions, it is judged that there are insoluble sediments such as stones and hard particles in the drainage blind pipe 1 and the third injection part is used. The specific use process of the structure is as follows: Step 1, close the flow control valve 27 on the solution injection pipe 22, connect the slag discharge pipe 24 to the pump, and open the flow control valve 27 on the slag discharge pipe 24; Step 2, the pump starts working, and the insoluble sediments such as stones and hard particles in the drainage blind pipe 1 are pumped out by the pump; Step 3, the pump stops working, and closes the flow control valve 27 on the slag discharge pipe 24; Step 4, open the flow control valve 27 on the solution injection pipe 22, pull the piston push rod 23, so that a space for retaining the solution is generated inside the injection pipe body 21; Step 5, inject the solution into the space for retaining the solution inside the injection pipe body 21 through the solution injection pipe 22; Step 6, close the flow control valve 27 on the solution injection pipe 22, push the piston push rod 23, and inject the solution inside the injection pipe body 21 into the embedded part through the connecting pipe 25. After the reaction is completed, repeat the previous steps 4 to 6 according to actual needs to achieve the purpose of gradually dissolving and clearing the blockage. The present invention controls the injection rate and injection amount of the solution injection process through the flow control valve 27. The present invention removes insoluble sediments such as stones and hard particles in the drainage blind pipe 1 through the combination of the slag discharge pipe 24 and the water pump to ensure that the internal pipeline of the drainage blind pipe 1 is unobstructed.

[0065] Of course, the present invention also has a fourth specific structure of the injection part, that is, a slag discharge pipe 24 is added to the structure of the first injection part, the slag discharge pipe 24 is fixedly connected and connected to the injection pipe body 21, and the solution injection pipe 22 and the slag discharge pipe 24 are both provided with flow control valves 27. This situation is suitable for situations where there are many insoluble sediments such as stones and hard particles in the drainage mechanism, or the external water pressure of the tunnel lining is large, but the drainage volume suddenly decreases, etc., and it is judged that there are insoluble sediments such as stones and hard particles in the drainage blind pipe 1, and the fourth injection part structure is used. At the same time, the present invention also has a fifth specific structure of the injection part, that is, the solution injection pump is directly connected to the first injection pipe 12, and the solution injection pump is directly used to provide the embedded part with the solution.

[0066] To further optimize the solution, an internal thread 16 is provided on one side of the first injection pipe 12 close to the injection part, and the sealing part is preferably a first sealing cover. An external thread 26 is provided on one side of the first sealing cover close to the first injection pipe 12. The threaded connection between the internal thread 16 and the external thread 26 realizes a detachable connection between the embedded part and the sealing part. In daily operation, the first sealing cover is in a sealing state and is opened only when the dissolved liquid is injected. After the dissolved liquid is injected, in order to ensure the dissolution effect, the first sealing cover needs to be closed in time, and the one-way sealing cover 13 is in a closed state at this time. Under the double sealing action of the first sealing cover and the one-way sealing cover 13, the dissolved liquid inside the drainage blind pipe 1 has no gas entering the top, and a negative pressure is formed at the top of the drainage blind pipe 1. The dissolved liquid will stay in the drainage blind pipe 1 for a long time, thereby ensuring the reaction time between the dissolved liquid and the crystal, and improving the dissolution effect of the crystal.

[0067] An external thread 26 is provided on the side of the injection tube body 21 close to the pre-embedded part in the first injection part, the second injection part and the fourth injection part. An external thread 26 is provided on the side of the connecting tube 25 close to the pre-embedded part in the third injection part. The threaded connection between the internal thread 16 and the external thread 26 realizes a detachable connection between the pre-embedded part and the injection part, and the pre-embedded part and the injection part are internally connected, which ensures the normal circulation of the dissolved liquid and prevents leakage during the injection of the dissolved liquid.

[0068] Further optimization scheme, the drainage system includes a longitudinal drainage pipe 8, a transverse drainage pipe 6 and a central drainage ditch 5, the side of the drainage blind pipe 1 close to the bottom of the tunnel is connected and connected to the longitudinal drainage pipe 8, the longitudinal drainage pipe 8 is connected and connected to the transverse drainage pipe 6, the transverse drainage pipe 6 is arranged obliquely below the tunnel pavement 4, the relatively lower side of the transverse drainage pipe 6 is connected to the central drainage ditch 5, and the longitudinal drainage pipe 8 is arranged at the tunnel arch foot. In the present invention, two longitudinal drainage pipes 8 are provided, which are fixedly connected and connected to the two ends of the drainage blind pipe 1 respectively. The longitudinal drainage pipe 8 collects the seepage and dissolved liquid in all the drainage blind pipes 1 and then discharges them into the transverse drainage pipe 6. The seepage and dissolved liquid enter the central drainage ditch 5 through the transverse drainage pipe 6 and then are discharged from the tunnel. After the dissolved liquid injection mechanism injects the dissolved liquid into the drainage blind pipe 1, the dissolved liquid will flow through the longitudinal drainage pipe 8, the transverse drainage pipe 6 and the central drainage ditch 5 together with the seepage water in the later stage. In this process, the remaining dissolved liquid will react with the crystals in the longitudinal drainage pipe 8, the transverse drainage pipe 6 and the central drainage ditch 5, dissolve the crystals inside, and thus dissolve and remove the crystals in the entire tunnel drainage system. The present invention can be cleaned regularly to reduce the cost of later maintenance.

[0069] The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for a person skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

[0070] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0071] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0072] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A system for treating crystallization blockage of a tunnel drainage system, wherein surrounding rock, primary support concrete and secondary lining concrete (7) are arranged in sequence from outside to inside on the top of the tunnel, and the secondary lining concrete (7) is arranged on one side close to the tunnel space; characterized in that: The tunnel drainage system crystallization blockage disposal system includes: A drainage blind pipe (1), the drainage blind pipe (1) being arranged between the primary support concrete and the secondary lining concrete (7) and used for draining water seepage from the surrounding rock and the primary support concrete; A geotextile (3) and a waterproof board (2), wherein the geotextile (3) and the waterproof board (2) are arranged between the drainage blind pipe (1) and the secondary lining concrete (7), and the drainage blind pipe (1) and the geotextile (3) are in electrical communication with each other; a dissolving liquid injection mechanism, the dissolving liquid injection mechanism being in communication with the drainage blind pipe (1) and being used for injecting dissolving liquid into the drainage blind pipe (1) to dissolve crystals attached to the drainage blind pipe (1) and the geotextile (3); A drainage mechanism is connected to and communicates with the drainage blind pipe (1), and is used to discharge seepage water and dissolved liquid in the drainage blind pipe (1).

2. A tunnel drainage system crystal blockage treatment system according to claim 1, characterized in that: The dissolving liquid injection mechanism comprises: A pre-buried part, the pre-buried part is fixedly connected to and in conduction with the drainage blind pipe (1), and the pre-buried part is arranged above the tunnel; An injection part or a plugging part, one end of the embedded part passes through the second lining concrete (7) and is detachably connected to the injection part or the plugging part, the injection part is used to supply a dissolving liquid to the embedded part, and the plugging part is used to plug the embedded part.

3. A tunnel drainage system crystal blockage treatment system according to claim 2, characterized in that: The embedded part comprises: A first drainage pipe (11), wherein the first drainage pipe (11) is arranged in the drainage blind pipe (1); A first injection pipe (12), the first injection pipe (12) is fixedly connected to and communicates with the first drainage pipe (11), and the first injection pipe (12) penetrates the second lining concrete (7) and is detachably connected to the injection portion or the blocking portion.

4. A tunnel drainage system crystal blockage treatment system according to claim 3, characterized in that: One-way blocking covers (13) are provided at both ends of the first drainage pipe (11), and the one-way blocking cover (13) has two states, namely a closed state and an open state: When the one-way blocking cover (13) is in a closed state, the first drainage pipe (11) is not connected to the drainage blind pipe (1), and the seepage water in the surrounding rock and the primary support concrete cannot enter the first drainage pipe (11); When the one-way blocking cover (13) is in an open state, the first drainage pipe (11) is connected to the drainage blind pipe (1), and the dissolved liquid enters the drainage blind pipe (1) from the first drainage pipe (11); Wherein, when the liquid pressure in the first drain pipe (11) is greater than a first threshold value, the one-way sealing cover (13) switches from a closed state to an open state; when the liquid pressure in the first drain pipe (11) is less than a second threshold value, the one-way sealing cover (13) switches from an open state to a closed state.

5. A tunnel drainage system crystal blockage treatment system according to claim 4, characterized in that: The end of the first drain pipe (11) is rotatably connected to the one-way blocking cover (13); a connecting component is provided between the first drain pipe (11) and the one-way blocking cover (13); the connecting component is used to apply a pulling force to the one-way blocking cover (13); the first drain pipe (11) and the one-way blocking cover (13) are in a closed state under the action of the pulling force.

6. A tunnel drainage system crystal blockage treatment system according to claim 5, characterized in that: The connection assembly comprises corresponding built-in iron sheets (14) and magnetic blocks (15), wherein the built-in iron sheets (14) are fixedly arranged on a side of the one-way blocking cover (13) facing the first drain pipe (11), and the magnetic blocks (15) are fixedly arranged inside the first drain pipe (11).

7. A tunnel drainage system crystal blockage treatment system according to claim 2, characterized in that: The injection part comprises: An injection pipe body (21), the injection pipe body (21) being detachably connected to and in communication with the embedded part; A dissolving liquid injection pipe (22), the dissolving liquid injection pipe (22) is fixedly connected to and communicated with the injection pipe body (21), and is used to supply the dissolving liquid to the injection pipe body (21).

8. A tunnel drainage system crystal blockage treatment system according to claim 7, characterized in that: The dissolving liquid injection tube (22) is arranged on a side of the injection tube body (21) close to the pre-embedded portion, and a piston pushing rod (23) is slidably connected inside the end of the injection tube body (21) away from the pre-embedded portion.

9. A tunnel drainage system crystal blockage treatment system according to claim 8, characterized in that: The injection pipe body (21) is fixedly connected to and communicated with a slag discharge pipe (24); the piston push rod (23) and the slag discharge pipe (24) are respectively arranged at two ends of the injection pipe body (21); the injection pipe body (21) is connected to and communicated with a connecting pipe (25) between the slag discharge pipe (24) and the piston push rod (23); the connecting pipe (25) is detachably connected to and communicated with the embedded part.

10. A tunnel drainage system crystal blockage treatment system according to any one of claims 7 to 9, characterized in that: The dissolving liquid injection pipe (22) is provided with a flow control valve (27).

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