Self-response type tunnel joint expansion plugging device and tunnel protection system

Abstract

The invention discloses a self-response type tunnel joint expansion plugging device and a tunnel protection system, and relates to the technical field of tunnel engineering.The self-response type tunnel joint expansion plugging device comprises a plugging shell, a first percussion cavity, a second percussion cavity and a percussion assembly; the first percussion cavity is filled with liquid and is provided with a vibration floater; the second percussion cavity is filled with liquid and is communicated with the first percussion cavity through a one-way component in multiple directions of the space, and the vibration floater can vibrate in the first percussion cavity under the action of external vibration so that the hydraulic pressure in the second percussion cavity can be increased; a sensing assembly on the plugging shell can enable the hydraulic pressure in the second percussion cavity to rise under the action of external water pressure; the percussion assembly can trigger the crushing partition plate when the hydraulic pressure in the second percussion cavity rises, so that the first cavity communicates with the second cavity, the first component and the second component can make contact and react to generate volume expansion, and the crack is plugged after the plugging shell is opened. According to the self-response type tunnel joint expansion plugging device and the tunnel protection system, adaptability and timeliness are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel engineering, in particular to a self-response type tunnel joint expansion plugging device and a tunnel protection system. BACKGROUND

[0002] As important transportation infrastructure, the waterproofing and plugging of the joints of tunnels in water-rich strata are crucial to the safety of the structure and the stability of the operation. In regions where earthquakes, floods and fires occur frequently, the deformation of the joints of tunnels under the influence of vibration load, high water pressure and high temperature can easily lead to cracks, forming leakage channels and causing problems such as the failure of the waterproof layer to seal, which seriously threatens the safety of the tunnel.

[0003] Traditional post-disaster maintenance of tunnels requires the tunnel structure to be evaluated and the damaged parts to be plugged and repaired. This method relies on manual operation and is difficult to respond in a timely manner after a disaster occurs, and cannot contain the problem from expanding in the early stages of leakage, which can easily lead to further damage. In conventional tunnel monitoring technology, some rely on electronic sensing devices to detect damage or leakage. The tunnel environment is often humid and there is electromagnetic interference, and such electronic components are prone to failure in extreme conditions, making it difficult to ensure reliability in the long cycle of tunnel use and operation. Moreover, conventional tunnel monitoring is usually targeted at a single disaster, which has poor adaptability. SUMMARY

[0004] The purpose of the present application is to provide a self-response type tunnel joint expansion plugging device and a tunnel protection system to solve the problems existing in the prior art and improve adaptability and timeliness.

[0005] To achieve the above-mentioned purpose, the present application provides the following solutions: The application provides a self-response tunnel joint expansion sealing device, which comprises a sealing shell, a first firing cavity, a second firing cavity and a firing assembly; the sealing shell is embedded in a tunnel joint, the sealing shell is provided with a partition plate, the partition plate divides the sealing shell into independent first and second cavities, the first and second cavities are respectively filled with first and second components; the first firing cavity is fixedly arranged in the sealing shell, the first firing cavity is filled with liquid and provided with a vibrating float; the second firing cavity is fixedly arranged in the sealing shell, the second firing cavity is filled with liquid, the first firing cavity is communicated with the second firing cavity in multiple directions through one-way components, the liquid in each one-way component flows from the first firing cavity to the second firing cavity, the vibrating float can vibrate in the first firing cavity under the action of external vibration and push part of the liquid into the second firing cavity through the one-way components to increase the liquid pressure in the second firing cavity; the sealing shell is further provided with a sensing channel for communicating the outside and the second firing cavity, a sensing assembly is movably arranged in the sensing channel, the sensing assembly can move in the sensing channel under the action of external water pressure to increase the liquid pressure in the second firing cavity; the firing assembly is communicated with the second firing cavity, the firing assembly can be triggered when the liquid pressure in the second firing cavity increases to move in the sealing shell to break the partition plate, so that the first and second cavities are communicated, the first and second components can react and expand to seal the crack after the sealing shell is expanded.

[0006] Preferably, the firing assembly comprises a pressure pipe, a firing piston, a striker and an elastic assembly; the pressure pipe is communicated with the second firing cavity, the firing piston is arranged in the pressure pipe, one end of the elastic assembly is fixedly connected to the partition plate, the other end of the elastic assembly is connected with the striker, and the firing piston is connected with the other end of the elastic assembly; the firing piston moves in the pressure pipe under the pushing action of the liquid in the second firing cavity to disconnect the elastic assembly and the firing piston, and the elastic assembly can be deformed under the action of pre-tightening force to drive the striker to hit the partition plate.

[0007] Preferably, the first firing cavity is a spherical cavity, the first firing cavity is sealed through the partition plate and symmetrically arranged about the partition plate, and a plurality of one-way components are uniformly distributed in the spherical direction of the first firing cavity.

[0008] Preferably, the second firing chamber comprises two annular pipes arranged vertically and in communication, one of the annular pipes is arranged parallel to the partition plate and radially perpendicular to the joint, the other of the annular pipes is arranged perpendicular to the partition plate and radially parallel to the joint, both of the annular pipes are sealed through the partition plate and arranged symmetrically about the partition plate; the firing assembly is communicated with the annular pipe parallel to the partition plate, and the sensing channel is communicated with the annular pipe perpendicular to the partition plate.

[0009] Preferably, the sensing channel is arranged to be two and arranged symmetrically about the partition plate, and the sensing assembly is arranged in each of the sensing channels.

[0010] Preferably, the sensing assembly comprises an elastic diaphragm and a sensing piston, the elastic diaphragm is arranged on a side of the sensing channel away from the second firing chamber, and the sensing piston is arranged in the sensing channel; the elastic diaphragm can be deformed to the side close to the second firing chamber under the action of external water pressure, so as to push the sensing piston to move in the direction close to the second firing chamber, so that the liquid pressure in the second firing chamber is increased.

[0011] Preferably, the tunnel sealing system further comprises a pull rod assembly, the pull rod assembly is arranged radially perpendicular to the joint, one end of the pull rod assembly extends out of the sealing shell and is used for fixed connection with the tunnel, and the pull rod assembly can be inserted into the sealing shell and fixedly connected with the partition plate in a sealed manner.

[0012] Preferably, the pull rod assembly comprises a heat transfer pull rod, the second firing chamber is provided with the heat transfer pull rod on both sides radially perpendicular to the joint, and each of the heat transfer pull rods is sealed through the partition plate and arranged symmetrically about the partition plate; each of the heat transfer pull rods has a hollow channel inside, and each of the hollow channels is provided with a heat transfer pipe communicated with the second firing chamber, and the heat transfer pipe is filled with liquid; the heat transfer pull rod can transfer the heat of the tunnel to the heat transfer pipe, so as to heat and warm the internal liquid, so that the liquid pressure in the second firing chamber is increased.

[0013] The application also provides a tunnel protection system, which comprises a plurality of self-response type tunnel joint expansion sealing devices as described above, and the plurality of self-response type tunnel joint expansion sealing devices are arranged at tunnel joints in a ring direction of the tunnel.

[0014] Preferably, the tunnel joint comprises, in sequence from inside to outside in the radial direction, a sealing layer, a grouting layer, a back-sticking waterstop, a waterproof layer and a concrete layer; the grouting layer is provided with a vertically arranged embedded waterstop in the radial direction of the joint; a plurality of self-responsive tunnel joint expansion sealing devices are distributed in the radial direction of the joint at the grouting layer, between the embedded waterstop and the back-sticking waterstop, and each self-responsive tunnel joint expansion sealing device is fixedly connected to the lining layer at both ends in the radial direction perpendicular to the joint.

[0015] The present application has the following technical effects relative to the prior art: The self-responsive tunnel joint expansion sealing device provided by the present application is arranged at the tunnel joint. The multidirectional vibration of an earthquake is fed back by the vibration float in the first firing chamber. The vibration float vibrates in a certain direction when an earthquake occurs, pushes the liquid in the corresponding direction to pass from the first firing chamber into the second firing chamber through the one-way component, increases the liquid pressure in the second firing chamber to trigger the firing assembly to break the partition plate. Alternatively, when a flood or external sudden water inflow occurs, water seeps into the tunnel joint, and when the external water pressure rises, the sensing assembly can move in the sensing channel under the action of the water pressure to increase the liquid pressure in the second firing chamber to trigger the firing assembly to break the partition plate. When the partition plate is broken, the first component and the second component in the first chamber and the second chamber can contact and react to expand in volume to expand the sealing shell and seal the cracks. In this way, the device can automatically respond to disaster characteristics such as earthquake vibration, flood water pressure, without manual intervention and external energy, realize rapid and effective sealing of the damaged tunnel joint, and has the advantages of simple structure, strong adaptability, integrated disaster identification and disposal function, high reliability in extreme tunnel environments such as moisture and signal transmission obstruction, solving the problem of easy failure of traditional electronic sensors, facilitating popularization and application in tunnel engineering, and being conducive to improving the safety of tunnels in multiple disaster environments.

[0016] The present application also provides a tunnel protection system, wherein a plurality of the self-responsive tunnel joint expansion sealing devices are distributed in the radial direction of the tunnel at the tunnel joint to further improve the protection performance of the tunnel joint. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 The structure diagram of the self-responsive tunnel joint expansion sealing device provided for Embodiment One; Figure 2 The structure diagram of the self-responsive tunnel joint expansion sealing device provided for Embodiment Two;Figure 1 A cross-sectional view of the vertical partition plate; Figure 3 A cross-sectional view of the vertical partition plate; Figure 1 A cross-sectional view of the vertical partition plate; Figure 4 A cross-sectional view of the tunnel protection system provided for Example Two; Figure 5 A radial view of the tunnel protection system provided for Example Two.

[0019] Figure 6 A cross-sectional view of the vertical partition plate; Figure 5 A cross-sectional view of the vertical partition plate;

[0020] In the figure: 1 - embedded waterstop; 2 - lining layer; 3 - sealing layer; 4 - grouting layer; 5 - backstick waterstop; 6 - waterproof layer; 7 - concrete layer; 8 - liquid flow assembly; 9 - firing assembly; 10 - sealing shell; 11 - adhesive; 12 - vibrating float; 13 - first firing cavity; 14 - one-way component; 15 - clamping groove; 16 - heat transfer pull rod; 17 - heat transfer pipe; 18 - induction piston; 19 - elastic diaphragm; 20 - annular pipeline; 21 - fixed seat; 22 - energy storage spring; 23 - pressure pipe; 24 - firing piston; 25 - striker; 26 - first cavity; 27 - second cavity; 28 - partition plate; 29 - outer wall; 30 - first component; 31 - second component. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0022] The purpose of the present application is to provide a self-responsive tunnel joint expansion sealing device and a tunnel protection system to solve the problems existing in the prior art and improve adaptability and timeliness.

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0024] Example One The present embodiment provides a self-responsive tunnel joint expansion sealing device, please refer to Figures 1-6, including a blocking shell 10, a first trigger chamber 13, a second trigger chamber and a trigger assembly 9; the blocking shell 10 is used to embed in the tunnel joint, the blocking shell 10 has a partition plate 28, the partition plate 28 divides the blocking shell 10 into independent first cavity 26 and second cavity 27, the first cavity 26 and the second cavity 27 are filled with first component 30 and second component 31 respectively; the first trigger chamber 13 is fixedly arranged in the blocking shell 10, the first trigger chamber 13 is filled with liquid and is provided with a vibrating float 12; the second trigger chamber is fixedly arranged in the blocking shell 10, the second trigger chamber is filled with liquid, the first trigger chamber 13 is communicated with the second trigger chamber in multiple directions through one-way components 14, the liquid flow direction in each one-way component 14 is from the first trigger chamber 13 to the second trigger chamber, the vibrating float 12 can vibrate in the first trigger chamber 13 under the action of external vibration and can push part of the liquid into the second trigger chamber through the one-way component 14 to make the liquid pressure in the second trigger chamber increase; the blocking shell 10 is further provided with a sensing channel communicating with the outside and the second trigger chamber, a sensing assembly is movably arranged in the sensing channel, the sensing assembly can move in the sensing channel under the action of external water pressure to make the liquid pressure in the second trigger chamber increase; the trigger assembly 9 is communicated with the second trigger chamber, the trigger assembly 9 can be triggered when the liquid pressure in the second trigger chamber increases, so as to move in the blocking shell 10 to break the partition plate 28, so that the first cavity 26 and the second cavity 27 are communicated, and the first component 30 and the second component 31 can contact and react to expand the volume, so as to open the blocking shell 10 and seal the crack.

[0025] The whole is arranged at the tunnel joint, the multidirectional vibration of the earthquake is vibrated and sensed by the vibrating float 12 in the first trigger chamber 13, the vibrating float 12 vibrates in a certain direction when the earthquake occurs, pushes the liquid in the corresponding direction to enter the second trigger chamber from the first trigger chamber 13 through the one-way component 14, so that the liquid pressure in the second trigger chamber increases to trigger the trigger assembly 9 to break the partition plate 28; or when the flood or external sudden water inflow occurs, the water body seeps into the tunnel joint, when the external water pressure increases, the sensing assembly can move in the sensing channel under the action of water pressure, so that the liquid pressure in the second trigger chamber increases to trigger the trigger assembly 9 to break the partition plate 28; after the partition plate 28 is broken, the first component 30 and the second component 31 in the first cavity 26 and the second cavity 27 can contact and react to expand the volume, so as to open the blocking shell 10 and seal the crack; in this way, the physical and mechanical mechanism can automatically respond to the disaster characteristics such as earthquake vibration, flood water pressure, without manual intervention and external energy, realizing rapid and effective sealing of the damaged tunnel joint, and the device has the advantages of simple structure, strong adaptability, integrated disaster identification and disposal function, high reliability in extreme tunnel environment such as wetness and signal transmission obstruction, solving the problem of easy failure of traditional electronic sensors, being convenient for popularization and application in tunnel engineering, and being beneficial to improving the safety of the tunnel in the multi-disaster environment.

[0026] The first component 30 is a high-activity isocyanate prepolymer material, and the second component 31 is a polyol-amine composite system material. The high-activity isocyanate prepolymer and the polyol-amine composite system are stable under the physical isolation of the partition plate 28, and can quickly generate volume expansion through chemical reaction after contact to form an expanded material with a plugging effect.

[0027] In an optional solution of the embodiment, preferably, the firing assembly 9 includes a pressure tube 23, a firing piston 24, a striker 25, and a spring assembly; the pressure tube 23 communicates with the second firing chamber, the firing piston 24 is arranged in the pressure tube 23, one end of the spring assembly is fixedly connected to the partition plate 28, the other end of the spring assembly is connected to the striker 25, and the firing piston 24 is connected to the other end of the spring assembly; the firing piston 24 moves in the pressure tube 23 under the liquid pushing action in the second firing chamber to disconnect the spring assembly from the firing piston 24, and the spring assembly can deform under the pre-tightening force to drive the striker 25 to impact the partition plate 28.

[0028] The multi-type parameter changes such as multi-directional vibration of an earthquake and high water pressure of a flood are converted into changes in the hydraulic pressure in the pressure tube 23, the hydraulic pressure in the second firing chamber is consistent with the hydraulic pressure in the pressure tube 23, and the change in the hydraulic pressure in the second firing chamber can be embodied as the pushing of the firing piston 24 in the pressure tube 23 to move, the release of the limiting of the spring assembly, the release of the elastic potential energy of the spring assembly, and the driving of the striker 25 to impact the partition plate 28. Specifically, the spring assembly includes a fixed seat 21 and an energy storage spring 22 arranged thereon, the energy storage spring 22 is connected to the conical portion of the striker 25 outside the pressure tube 23, and the energy storage spring 22 stores elastic potential energy by being limited and curled through the firing piston 24. The portion of the striker 25 extending into the pressure tube 23 is provided with a limiting hole, and the lower end of the firing piston 24 is provided with a limiting hook. Please refer to Figure 6 In the limiting state, the limiting hook of the firing piston 24 is hooked in the limiting hole to achieve limiting, and when the pressure in the pressure tube 23 increases to push the firing piston 24 to move downward, the limiting hook is separated from the limiting hole to release the limiting of the striker 25. The firing piston 24 is arranged in the structure of a spring piston, that is, one side of the spring is fixed in the pressure tube 23, and the other side is fixedly connected to the side of the piston without the limiting hook, so that the spring controls the repositioning of the piston when the pressure changes.

[0029] In an optional solution of the embodiment, preferably, the first firing chamber 13 is arranged as a spherical chamber, the first firing chamber 13 is sealed and penetrates the partition plate 28 and is symmetrically arranged about the partition plate 28, and the plurality of one-way components 14 are uniformly distributed in the spherical direction of the first firing chamber 13.

[0030] The ball cavity is fixedly embedded on the partition plate 28 and can be fixedly sealed by sealing glue. The ball cavity is spherical and symmetrically arranged about the partition plate 28, so as to facilitate the vibration float 12 to adapt to vibration responses in all directions. The ball cavity is connected with the second firing cavity through the one-way components 14 in three orthogonal directions (parallel to the joint surface direction and perpendicular to the joint surface direction). Specifically, the number of the one-way components 14 is six, and each one-way component 14 is a micro one-way valve, which can meet the size requirement.

[0031] In an optional solution of the embodiment, preferably, the second firing cavity includes two annular pipelines 20 arranged vertically and in communication. One annular pipeline 20 is arranged parallel to the partition plate 28 and perpendicular to the joint surface. The other annular pipeline 20 is arranged perpendicular to the partition plate 28 and parallel to the joint surface. Both annular pipelines 20 are sealed through the partition plate 28 and symmetrically arranged about the partition plate 28. The firing assembly 9 is connected to the annular pipeline 20 parallel to the partition plate 28, and the sensing channel is connected to the annular pipeline 20 perpendicular to the partition plate 28.

[0032] The annular pipeline 20 is fixedly embedded on the partition plate 28 and can be fixedly sealed by sealing glue. The two annular pipelines 20 are arranged vertically, so as to be connected with the ball cavity through the one-way components 14 in the orthogonal direction and to meet the liquid flow between the first firing cavity 13 and the second firing cavity in multiple directions, thereby improving the sensing sensitivity to vibration. The pressure pipe 23 can be arranged on the annular pipeline 20 perpendicular to the joint surface and in communication.

[0033] In an optional solution of the embodiment, preferably, the sensing channel is arranged in two and symmetrically arranged about the partition plate 28. The sensing assembly is arranged in each sensing channel.

[0034] The two sensing channels can be arranged along the joint surface in the radial direction, so as to directly and quickly sense the water pressure penetrating in the radial direction at the joint surface.

[0035] In an optional solution of the embodiment, preferably, the sensing assembly includes an elastic diaphragm 19 and a sensing piston 18. The elastic diaphragm 19 is arranged on the side of the sensing channel away from the second firing cavity, and the sensing piston 18 is arranged in the sensing channel. The elastic diaphragm 19 can be deformed to the side close to the second firing cavity under the action of external water pressure, so as to push the sensing piston 18 to move in the direction close to the second firing cavity, so that the liquid pressure in the second firing cavity is increased.

[0036] Wherein, the high water pressure of flood is fed back by the deformation of the elastic diaphragm 19, and the elastic diaphragm 19 and the induction piston 18 are closed cavities. When the flood or the external sudden water surge occurs, the back-sticking water stop 5 or the middle-buried water stop 1 is damaged, the tunnel joint penetrates into the water body, and the water pressure rises. The water pressure pushes the elastic diaphragm 19 to deform, pushes the induction piston 18 to move, and the hydraulic pressure in the second firing chamber rises. Specifically, the induction piston 18 can be provided as a spring piston, that is, one end of the piston is fixedly connected to the inner wall of the induction channel through a spring. When the water pressure fluctuates or drops, the spring can drive the piston to reset, thereby maintaining the stability of the hydraulic pressure pipeline pressure. The pre-tightening force of the spring can assist the elastic diaphragm 19 to maintain the initial pressure state, and the piston displacement movement has the reset ability after the hydraulic pressure conduction without reaching the pressure trigger threshold.

[0037] In the optional scheme of the embodiment, preferably, the self-response type tunnel joint expansion plugging device provided by the embodiment further comprises a pull rod assembly, the pull rod assembly is arranged along the direction perpendicular to the joint, one end of the pull rod assembly extends out of the plugging shell 10 and is used for fixedly connecting with the tunnel, and the pull rod assembly can extend into the plugging shell 10 and be sealingly and fixedly connected with the partition plate 28.

[0038] Wherein, the plugging shell 10 is fixedly connected with the lining layer 2 of the tunnel through the outer end of the pull rod assembly, and the inner end of the pull rod assembly is fixedly connected with the partition plate 28. The inner end of the pull rod assembly is sealingly and fixedly connected with the partition plate 28 through the clamping groove 15. In the case of tensile damage along the direction perpendicular to the joint surface caused by an earthquake, the pull rod assembly moves to make the partition plate 28 break, and finally the mixing of the two components of the two-component polyurethane foaming system is realized, so as to achieve the plugging purpose of the tunnel joint.

[0039] In the optional scheme of the embodiment, preferably, the pull rod assembly comprises a heat transfer pull rod 16, and the second firing chamber is provided with the heat transfer pull rod 16 on both sides along the direction perpendicular to the joint. Each heat transfer pull rod 16 is sealingly and penetratingly arranged in the partition plate 28 and is symmetrically arranged about the partition plate 28. Each heat transfer pull rod 16 has a hollow channel inside, and a heat transfer pipe 17 communicating with the second firing chamber is arranged in each hollow channel. The heat transfer pipe 17 is filled with a liquid. The heat transfer pull rod 16 can transfer the heat of the tunnel to the heat transfer pipe 17, thereby heating and warming the internal liquid, so as to increase the hydraulic pressure in the second firing chamber.

[0040] Wherein, each heat transfer pipe 17 is in contact with the heat transfer rod 16 for heat transfer, the outer end of the heat transfer rod 16 can be provided as a large end, so as to improve the connection area with the tunnel and improve the stability; the end surface of the heat transfer rod 16 on both sides is smeared with an adhesive 11 and bonded together with the lining layer 2, to ensure effective heat conduction and can drive the heat transfer rod 16 to displace when the tunnel joint is deformed; the high temperature generated by the tunnel fire heats the lining layer 2, and the temperature change of the lining layer 2 heats the liquid in the heat transfer pipe 17 through the heat transfer rod 16, the liquid expands and pushes the hydraulic pressure in the second firing chamber; specifically, the liquid can be set as silicone oil.

[0041] Wherein, the first firing chamber 13, the second firing chamber, the heat transfer pipe 17, the one-way component 14, the vibrating float 12, the rod assembly and the induction assembly constitute a liquid flow assembly 8, the first firing chamber 13, the second firing chamber and the heat transfer pipe 17 are filled with liquid, and the liquid is inducted by the vibrating float 12 to the earthquake vibration, inducted by the rod assembly to the tensile deformation and high temperature disaster, and inducted by the induction assembly to the flood.

[0042] Further preferably, the outer wall 29 of the sealing shell 10 and the partition plate 28 are both made of glass material, which can be broken by the reaction of the expansion material to overflow the expansion material and seal the crack, and can be easily damaged under the influence of the shear displacement (parallel to the joint surface direction) of the tunnel joint caused by the earthquake, so that the content reacts.

[0043] Embodiment two The embodiment provides a tunnel protection system, please see Figure 4 and Figure 5 , comprising a plurality of self-responsive tunnel joint expansion sealing devices as in embodiment one, a plurality of self-responsive tunnel joint expansion sealing devices are distributed along the tunnel joint at the tunnel joint. Wherein, the circumferential distribution can further improve the protection performance of the tunnel joint.

[0044] In the optional scheme of the embodiment, more preferably, the tunnel joint comprises a sealing layer 3, a grouting layer 4, a back-sticking waterstop 5, a waterproof layer 6 and a concrete layer 7 which are sequentially fixed along the radial direction from inside to outside; the middle-buried waterstop 1 is arranged vertically along the joint radial direction at the grouting layer 4; a plurality of self-responsive tunnel joint expansion sealing devices are circumferentially distributed at the grouting layer 4, between the middle-buried waterstop 1 and the back-sticking waterstop 5, and the two ends of each self-responsive tunnel joint expansion sealing device perpendicular to the joint radial direction are fixedly connected to the lining layer 2.

[0045] Wherein, the middle-buried waterstop 1 can be a rubber waterstop, the sealing layer 3 is provided as a sealing paste, the grouting layer 4 is grouting cement, and the lining layer 2 is a concrete lining; the waterstop is installed in the reserved joint groove when the construction reaches the tunnel joint, and is installed in the middle part between the back-sticking waterstop 5 and the middle-buried waterstop 1, and is arranged along the tunnel joint cross section circumferentially at equal intervals.

[0046] The principles and implementations of the present application are described in the specific examples. The above examples are only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation and application range will be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A self-responsive tunnel joint expansion plug, characterized by: The application relates to a sealing shell embedded in a tunnel joint, wherein a partition plate is arranged in the sealing shell, the partition plate divides the sealing shell into a first cavity and a second cavity, the first cavity and the second cavity are respectively filled with a first component and a second component, a first firing cavity is fixedly arranged in the sealing shell, the first firing cavity is filled with liquid and is provided with a vibrating float, a second firing cavity is fixedly arranged in the sealing shell, the second firing cavity is filled with liquid, the first firing cavity and the second firing cavity are communicated with each other in multiple directions through one-way components, the liquid flows from the first firing cavity to the second firing cavity through the one-way components, the vibrating float can vibrate in the first firing cavity under the action of external vibration and can push part of the liquid into the second firing cavity through the one-way components to increase the liquid pressure in the second firing cavity, a sensing channel is arranged on the sealing shell and is communicated with the outside and the second firing cavity, a sensing assembly is movably arranged in the sensing channel, the sensing assembly can move in the sensing channel under the action of external water pressure to increase the liquid pressure in the second firing cavity, a firing assembly is communicated with the second firing cavity, the firing assembly can be triggered when the liquid pressure in the second firing cavity is increased, the firing assembly can move in the sealing shell to break the partition plate, the first cavity and the second cavity are communicated, the first component and the second component can contact and react to expand to seal the crack after the sealing shell is expanded. The firing assembly comprises a pressure pipe, a firing piston, a striker and an elastic assembly, the pressure pipe is communicated with the second firing cavity, the firing piston is arranged in the pressure pipe, one end of the elastic assembly is fixedly connected to the partition plate, the other end of the elastic assembly is connected to the striker, the firing piston is connected to the other end of the elastic assembly, the firing piston moves in the pressure pipe under the action of the liquid in the second firing cavity, the elastic assembly is deformed under the action of the pre-tightening force to drive the striker to hit the partition plate. The first firing cavity is arranged as a spherical cavity, the first firing cavity is arranged symmetrically through the partition plate, and the one-way components are uniformly distributed in the spherical cavity. The second firing cavity comprises two annular pipes which are arranged vertically and communicated, one annular pipe is arranged parallel to the partition plate and is arranged radially perpendicular to the joint, the other annular pipe is arranged perpendicular to the partition plate and is arranged radially parallel to the joint, the two annular pipes are arranged symmetrically through the partition plate, the firing assembly is communicated with the annular pipe parallel to the partition plate, and the sensing channel is communicated with the annular pipe perpendicular to the partition plate. The sensing channel is arranged symmetrically through the partition plate, and the sensing assembly is arranged in each sensing channel.

2. The self-responsive tunnel joint expansion plug of claim 1, wherein: ​ ​ 3. The self-responsive tunnel joint expansion plug of claim 1, wherein: ​ 4. The self-responsive tunnel joint expansion plug of claim 2, wherein: ​ 5. The self-responsive tunnel joint expansion plug of claim 4, wherein: ​ 6. The self-responsive tunnel joint expansion plug of claim 5, wherein: The sensing assembly comprises an elastic diaphragm and a sensing piston, the elastic diaphragm is arranged on the side of the sensing channel away from the second firing chamber, and the sensing piston is arranged in the sensing channel; the elastic diaphragm can be deformed towards the side close to the second firing chamber under the action of external water pressure, so as to push the sensing piston to move in the direction close to the second firing chamber, so that the hydraulic pressure in the second firing chamber is increased.

7. The self-responsive tunnel joint expansion plug of claim 1, wherein: The sealing shell further comprises a pull rod assembly arranged along the radial direction perpendicular to the joint, one end of the pull rod assembly extends out of the sealing shell and is used for fixed connection with the tunnel, and the pull rod assembly can extend into the sealing shell and be sealingly and fixedly connected with the partition plate.

8. The self-responsive tunnel joint expansion plug of claim 7, wherein: The pull rod assembly comprises a heat transfer pull rod, the second firing chamber is provided with the heat transfer pull rod on both sides along the radial direction perpendicular to the joint, and each heat transfer pull rod is sealingly and symmetrically arranged with respect to the partition plate; each heat transfer pull rod has a hollow channel inside, and each hollow channel is provided with a heat transfer pipe communicating with the second firing chamber, and the heat transfer pipe is filled with liquid; the heat transfer pull rod can transfer the heat of the tunnel to the heat transfer pipe, so as to heat and warm the internal liquid, so that the hydraulic pressure in the second firing chamber is increased.

9. A tunnel protection system characterized by: The self-response type tunnel joint expansion sealing device comprises a sealing shell, a partition plate, a sensing assembly, a pull rod assembly and a second firing chamber.

10. The tunnel protection system of claim 9, wherein: The tunnel joint comprises, from inside to outside along the radial direction, a sealing layer, a grouting layer, a back-sticking waterstop, a waterproof layer and a concrete layer; the grouting layer is provided with a vertically arranged embedded waterstop; a plurality of self-response type tunnel joint expansion sealing devices are arranged on the grouting layer in the radial direction, between the embedded waterstop and the back-sticking waterstop, and each self-response type tunnel joint expansion sealing device is fixedly connected to the lining layer at both ends along the radial direction perpendicular to the joint.

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