Ultra-high pressure water inrush blocking device in tunnel and construction method thereof

Abstract

The invention relates to an ultra-high pressure water gushing plugging device in a tunnel and a construction method thereof, belonging to the technical field of tunnel engineering. By arranging a plurality of water diversion pipes, when testing the hydrostatic pressure, the force of high pressure water on the plugging wall blocks is dispersed through the plurality of water diversion pipes, thereby reducing the local force of the high pressure water on the plugging wall, thereby solving the problem that the existing plugging devices are all directly sealed with a slurry stop wall on the tunnel face, and then directly testing the hydrostatic pressure. Since there is only one inlet pipe arranged on the slurry stop wall, such an arrangement may cause the slurry stop wall to be directly ruptured due to excessive local hydrostatic pressure, and in severe cases, may also cause the problem of instability of the tunnel face.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to an ultra-high pressure water gushing plugging device in a tunnel and a construction method thereof. Background Art

[0002] With the continuous development of my country's expressways into mountainous areas in recent years, the length of tunnels has continued to increase during the excavation process. In addition, the geological structure is complex and changeable, especially in water-rich strata, it is inevitable to encounter high-pressure sudden water gushing. At this time, it is necessary to set up a blocking device to block the high-pressure water in the tunnel; but due to the complex and changeable geological structure of each section, the water pressure of the sudden water in each section is inconsistent. In order to ensure the successful implementation of the blocking plan, it is necessary to pre-test the static water pressure of the current section. Based on this, a blocking device in the tunnel is born.

[0003] For example, the utility model patent with the patent authorization announcement number: CN212389380U discloses a tunnel advance exploration hole karst high-pressure water inrush plugging device, including a tunnel advance exploration hole that penetrates the surrounding rock between the tunnel face and the karst pipeline, and the tunnel advance exploration hole is provided with an inlet pipe on one side of the tunnel face, one end of the inlet pipe extends from the tunnel face into the tunnel advance exploration hole, and the other end is connected to the diversion pipe 1 and the diversion pipe 2 that constitute the bifurcated pipe structure; the diversion pipe 1 is connected to the drainage pipe 1 through the reducer 1, and the drainage pipe 1 leads to the sump; the diversion pipe 2 is connected to the drainage pipe 2 through the reducer 2, and the drainage pipe 2 is connected to the grouting pipe. High-pressure gate valve 1 and high-pressure gate valve 2 are provided on the diversion pipe 1 and the diversion pipe 2, respectively.

[0004] Based on the search of patent authorization announcement numbers and the shortcomings found therein:

[0005] The existing plugging devices are all sealed with a slurry stop wall directly on the tunnel face, and then the hydrostatic pressure is directly tested. Since there is only one inlet pipe arranged on the slurry stop wall, such a setting may cause the slurry stop wall to be subjected to excessive local hydrostatic pressure and directly cause the rupture of the slurry stop wall in this part. In severe cases, it may also cause the tunnel face to become unstable. Summary of the invention

[0006] In order to solve the problem that the existing sealing devices are all sealed with a slurry stop wall directly on the tunnel face and then the hydrostatic pressure is directly tested. Since there is only one inlet pipe arranged on the slurry stop wall, such a setting may cause the slurry stop wall to be subjected to excessive local hydrostatic pressure and directly cause the rupture of the slurry stop wall in this part, and in severe cases may cause the tunnel face to become unstable, the present invention provides an ultra-high pressure water gushing sealing device in a tunnel and a construction method thereof.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A super-high-pressure water inrush plugging device in a tunnel, comprising a plugging wall and a plurality of water diversion pipe groups. The plugging wall is sealingly arranged in the tunnel face. The plugging wall comprises a plurality of plugging wall blocks, and the plurality of plugging wall blocks are stacked in sequence from bottom to top along the vertical height of the tunnel face to form the plugging wall. The plurality of plugging wall blocks are in one-to-one correspondence and matching with the plurality of water diversion pipe groups, and any one of the water diversion pipe groups is arranged in the corresponding plugging wall block.

[0009] The water diversion pipe group comprises a plurality of water diversion pipes, and the plurality of water diversion pipes are arranged on the plugging wall block at equal intervals along the width direction of the plugging wall. The water diversion pipes are arranged perpendicular to the end face of the plugging wall, and the water diversion pipes penetrate through the plugging wall.

[0010] As a preferred technical solution of the present invention, it further comprises a plurality of connecting components, and the plurality of connecting components are in one-to-one correspondence and matching with the plurality of water diversion pipes. Any one of the connecting components is arranged in the corresponding water diversion pipe, and the connecting component can lock or release its sealing cooperation relationship with the water diversion pipe according to the pressure in the plugging wall.

[0011] As a preferred technical solution of the present invention, the connecting component comprises a plurality of connecting units, and the plurality of connecting units are arranged on the water diversion pipe at equal intervals along the central axis direction of the water diversion pipe. The plurality of connecting units are all arranged in the plugging wall and are used for detecting the compaction force conditions at various positions of the plugging wall.

[0012] As a preferred technical solution of the present invention, the plurality of connecting units are arranged on the side wall of the water diversion pipe at equal angles along the central axis direction of the water diversion pipe and are used for detecting the compaction force conditions at various angles of the plugging wall.

[0013] As a preferred technical solution of the present invention, the connecting unit comprises a first connecting shell, a second connecting shell, a pressing block and a pressing spring device with a hollow interior. The first connecting shell and the second connecting shell are symmetrically arranged on the side walls at both ends of the water diversion pipe. The first connecting shell and the second connecting shell are both in communication with the interior of the water diversion pipe. The central axis of the first connecting shell and the central axis of the second connecting shell coincide with each other, and the central axis of the first connecting shell and the central axis of the second connecting shell are both arranged perpendicular to the central axis of the water diversion pipe. The pressing block is slidably and sealingly arranged in the first connecting shell along the central axis direction of the first connecting shell. The pressing spring device is arranged in the second connecting shell. Both ends of the pressing spring device are respectively connected with the pressing block and the second connecting shell, and the pressing block can lock or release its sealing cooperation relationship with the interior of the water diversion pipe.

[0014] As a preferred technical solution of the present invention, the force exerted by the pressing spring device on the pressing block is slightly smaller than the minimum force exerted by the pressing spring device on the pressing block when the mud of the blocking wall is normally compacted.

[0015] As a preferred technical solution of the present invention, the pressing block includes a first stop block, a connecting rod and a second stop block, the second stop block and the first stop block are slidably arranged in the first connecting shell in sequence along the direction from the first connecting shell to the second connecting shell, the two ends of the connecting rod are respectively connected to the first stop block and the second stop block, and the two ends of the pressing spring device are respectively connected to the first stop block and the second connecting shell.

[0016] As a preferred technical solution of the present invention, when the mud of the stop wall is normally compacted, the distance of the effective force exerted on the pressing block is defined as the effective action length, and the distance between the connecting unit closest to the high-pressure water end and the side wall of the stop wall in contact with the high-pressure water is equal to the effective action length.

[0017] As a preferred technical solution of the present invention, the height value of the blocking wall block is equal to the sum of the values ​​of the two effective action lengths, and the water diversion pipe group is arranged through the middle position of the corresponding blocking wall block.

[0018] A construction method for an ultra-high pressure water inrush plugging device in a tunnel, comprising the following steps:

[0019] S1: Install the mold for making the blocking wall at the tunnel face;

[0020] S2: Install the connecting component on the corresponding water diversion pipe;

[0021] S3: installing the water diversion pipe on the mold;

[0022] S4: injecting grout into the mold to produce the blocking wall block;

[0023] S5: After the blocking wall block is manufactured, observe the internal state of the water diversion pipe on the corresponding blocking wall block; if the internal state of the water diversion pipe is in a connected state, it means that the blocking wall block is successfully manufactured; if the internal state of the water diversion pipe is in a sealed state, it means that the blocking wall block has failed to be manufactured;

[0024] S6: If the blocking wall block is successfully manufactured, repeat the above steps S4-S5 until the blocking wall is successfully manufactured; if the blocking wall block fails to be manufactured, it is necessary to break the blocking wall block and re-manufacture it;

[0025] S7: After the blocking wall is manufactured, the mold is disassembled to complete the manufacturing.

[0026] The beneficial effects of the present invention are:

[0027] This solution is provided with multiple water pipes. When testing the hydrostatic pressure, the multiple water pipes can be used to jointly disperse the force of high-pressure water on the stop wall blocks, thereby reducing the local force of high-pressure water on the stop wall. This solves the problem that the existing sealing devices are all directly sealed with a slurry stop wall on the tunnel face and then directly test the hydrostatic pressure. Since there is only one inlet pipe arranged on the slurry stop wall, such a setting may cause the slurry stop wall to be subjected to excessive local hydrostatic pressure, which may directly cause the rupture of the part of the slurry stop wall. In severe cases, it may also cause the instability of the tunnel face. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0029] Figure 1 This is an overall diagram of an ultra-high pressure water inrush blocking device in a tunnel according to the present invention;

[0030] Figure 2 A diagram of the connected units of an ultra-high pressure water inrush plugging device in a tunnel according to the present invention;

[0031] Figure 3 This is an internal diagram of a connected unit of an ultra-high pressure water inrush plugging device in a tunnel according to the present invention.

[0032] Description of main symbols

[0033] In the figure: 1, blocking wall; 101, blocking wall block; 2, connecting unit; 201, first connecting shell; 202, second connecting shell; 203, pressing block; 2031, first blocking block; 2032, connecting rod; 2033, second blocking block; 204, pressing spring device. DETAILED DESCRIPTION

[0034] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0035] See also Figure 1-3The present embodiment provides an ultra-high pressure water inrush blocking device in a tunnel, comprising a blocking wall 1 and a plurality of water diversion pipe groups. The blocking wall 1 is sealed and arranged in the tunnel face. The blocking wall 1 comprises a plurality of blocking wall blocks 101. The plurality of blocking wall blocks 101 are stacked in sequence from bottom to top along the vertical height of the tunnel face to form the blocking wall 1. The plurality of blocking wall blocks 101 are matched one by one with a plurality of water diversion pipe groups. Any water diversion pipe group is arranged in the corresponding blocking wall block 101. The water diversion pipe group comprises a plurality of water diversion pipes. The plurality of water diversion pipes are arranged on the blocking wall blocks 101 at equal intervals along the width direction of the blocking wall 1. The water diversion pipes are arranged perpendicular to the end face of the blocking wall 1, and the water diversion pipes penetrate the blocking wall 1. This solution is provided with multiple water pipes. When testing the hydrostatic pressure, the multiple water pipes can be used to jointly disperse the force of high-pressure water on the stop wall block 101, thereby reducing the local force of high-pressure water on the stop wall 1. This solves the problem that the existing sealing devices are all directly sealed with a slurry stop wall on the tunnel face and then directly test the hydrostatic pressure. Since there is only one inlet pipe arranged on the slurry stop wall, such a setting may cause the slurry stop wall to be subjected to excessive local hydrostatic pressure, which may directly cause the rupture of the part of the slurry stop wall. In severe cases, it may also cause the problem of instability of the tunnel face.

[0036] Furthermore, compared with the traditional method of directly making the stop wall 1 in one go, the present solution gradually forms the stop wall 1 by making the stop wall blocks 101. Such a setting is conducive to the staff to check that when the setting of the stop wall block 101 does not meet the requirements, the stop wall block 101 can be directly broken and the stop wall 1 can be remade without remaking the entire stop wall 1. The present scheme also includes a plurality of connecting components, and the plurality of connecting components are matched with the plurality of water pipes in a one-to-one manner. Any connecting component is arranged in the corresponding water pipe, and the connecting component can lock or release its sealing cooperation relationship with the water pipe according to the pressure in the stop wall 1; the working principle of the connecting component needs to be explained here: the connecting component is arranged on the water pipe, and before making the stop wall block 101, the staff needs to seal the mold for making the stop wall block 101 on the tunnel face, and then install the water pipe with the connecting component installed in the mold, and then inject mud into the mold to make the stop wall block 101; according to common sense, if the mud in the mold is in a completely compacted state, the force exerted by the mud on the connecting component is constant within a standard range, and at this time, due to the force exerted by the mud on the connecting component, the connecting component releases its sealing cooperation state with the water pipe; similarly, if the mud in the mold is not in a completely compacted state, the force exerted by the mud on the connecting component is less than the standard range, so the connecting component continues to lock its sealing cooperation state with the water pipe. Based on this, by observing the matching relationship between the connecting component and the water pipe, it can be determined whether the corresponding blocking wall block 101 is successfully manufactured.

[0037] Specifically, the connecting assembly of this solution includes a plurality of connecting units 2, which are arranged on the water diversion pipe at equal intervals along the central axis of the water diversion pipe, and are all arranged in the blocking wall 1 to detect the compaction strength of each position of the blocking wall 1; in addition, a plurality of connecting units 2 are arranged on the side wall of the water diversion pipe at equal angles along the central axis of the water diversion pipe to detect the compaction strength of each angle of the blocking wall 1. Such a setting is conducive to detecting the compaction condition at each position of the same blocking wall block 101.

[0038] Specifically, the connecting unit 2 of the present solution includes a first connecting shell 201 with a hollow interior, a second connecting shell 202, a pressing block 203 and a pressing spring device 204. The first connecting shell 201 and the second connecting shell 202 are symmetrically arranged on the side walls of the water pipe at both ends. The first connecting shell 201 and the second connecting shell 202 are both interconnected with the interior of the water pipe. The central axis of the first connecting shell 201 and the central axis of the second connecting shell 202 coincide with each other, and the central axis of the first connecting shell 201 and the central axis of the second connecting shell 202 are both perpendicular to the central axis of the water pipe. The pressing block 203 is slidably sealed and arranged on the first connecting shell 201 along the central axis direction of the first connecting shell 201. In the shell 201, the pressing spring device 204 is arranged in the second connecting shell 202, and the two ends of the pressing spring device 204 are respectively connected to the pressing block 203 and the second connecting shell 202, and the pressing block 203 can lock or release its sealing cooperation relationship with the inside of the water pipe; the working principle of the connecting unit 2 is described here: in the initial state, the pressing block 203 is sealed with the inside of the water pipe, and after the mud is poured into the corresponding mold part and the compaction process is completed, the force of the mud on the pressing block 203 is greater than the force of the pressing spring on the pressing block 203, and then the mud will drive the pressing block 203 to move in the direction of the second connecting shell 202, so that the pressing block 203 releases its sealing cooperation state with the inside of the water pipe. It should be noted that in order to ensure the normal operation of the connecting unit 2, the force of the pressing spring device 204 on the pressing block 203 is slightly less than the minimum force of the mud of the blocking wall 1 on the pressing block 203 when the mud is normally compacted. It is also worth mentioning that the compaction process means eliminating the bubbles in the mud so that the mud can be completely filled in the mold.

[0039] It should also be noted that after the stop wall 1 is completed, there are external environmental factors such as high-pressure water or instability of the face that cause damage to the structure of the stop wall 1. This damage is divided into two situations. The first is that the damage involves the outer surface of the stop wall 1. The staff can judge the structural problems of the stop wall 1 by observing the outer surface of the stop wall 1; the second is that the damage does not involve the outer surface of the stop wall 1, but only involves the interior of the stop wall 1. Such damage makes it impossible for the staff to immediately judge the structural problems of the stop wall 1; in order to enable the staff to directly observe the second situation of the stop wall 1, the pressing block 203 of the present scheme includes a first stop block 2031, a connecting rod 2032 and a second stop block 2033, the second stop block 2033 and the first stop block 2031 are slidably arranged in the first connecting shell 201 in sequence along the direction from the first connecting shell 201 to the second connecting shell 202, and the two ends of the connecting rod 2032 are respectively connected to the first stop block 2031 and the second stop block. 2033 is connected, and the two ends of the pressing spring device 204 are connected to the first blocking block 2031 and the second connecting shell 202 respectively; it should be noted that after the mud is compacted, the first blocking block 2031 releases its sealing cooperation relationship with the water diversion pipe, and the first blocking block 2031 moves into the second connecting shell 202, while the second blocking block 2033 is still located in the first connecting shell 201; if the internal structure of the blocking wall 1 is damaged, the mud used to make the blocking wall 1 has been The solid-liquid mixed state is converted into a solid state, so there will be a pressure on the second blocking block 2033 to move toward the second connecting shell 202, so that the second blocking block 2033 will continuously reduce the connecting area inside the water diversion pipe, and even until the second blocking block 2033 will lock its sealing cooperation relationship with the inside of the water diversion pipe. Therefore, by providing the second blocking block 2033, the staff can confirm the internal situation of the blocking wall 1 by observing the area of ​​the inside of the water diversion pipe blocked by the second blocking block 2033. It should be further explained that the length of the connecting rod 2032 of this solution is equal to the size of the inner diameter of the water diversion pipe.

[0040] In addition, it is worth pointing out that in practice, when the mud is compacted, within a certain distance, as the thickness of the mud wrapped around the water pipe increases, the force exerted by the mud on the water pipe also increases; in this solution, when the mud of the stop wall 1 is normally compacted, the distance of the effective force exerted on the pressing block 203 is defined as the effective action length. Therefore, in fact, the mud that forms a sphere with the connecting unit 2 as the center and the effective action length as the radius will exert an effective force on the connecting unit 2. The distance between the connecting unit 2 closest to the high-pressure water end and the side wall of the stop wall 1 that contacts the high-pressure water is equal to the effective action length. This setting allows the staff to observe the matching relationship between the connecting unit 2 closest to the high-pressure water end and the water pipe to obtain whether the high-pressure water will cause deformation to the structure of the stop wall 1.

[0041] Furthermore, the height value of the blocking wall block 101 of the present solution is equal to the sum of the values ​​of the two effective action lengths, and the water diversion pipe group is arranged through the middle position of the corresponding blocking wall block 101. Such an arrangement enables the staff to obtain relevant information by observing the coordination relationship between the connecting unit 2 and the water diversion pipe if the structure of the blocking wall block 101 is damaged by external force during the production of the blocking wall block 101.

[0042] A construction method for an ultra-high pressure water inrush plugging device in a tunnel, comprising the following steps:

[0043] S1: Installing a mold for making a blocking wall 1 at the tunnel face;

[0044] S2: Install the connecting component on the corresponding water pipe;

[0045] S3: Install the water pipe on the mold;

[0046] S4: injecting grout into the mold to produce a blocking wall block 101;

[0047] S5: After the blocking wall block 101 is manufactured, observe the internal state of the water diversion pipe on the corresponding blocking wall block 101; if the internal state of the water diversion pipe is in a connected state, it means that the blocking wall block 101 is successfully manufactured; if the internal state of the water diversion pipe is in a sealed state, it means that the blocking wall block 101 has failed to be manufactured;

[0048] S6: If the blocking wall block 101 is successfully manufactured, repeat the above steps S4-S5 until the blocking wall 1 is successfully manufactured; if the blocking wall block 101 is unsuccessful in manufacturing, it is necessary to break the blocking wall block 101 and manufacture it again;

[0049] S7: After the stop wall 1 is manufactured, the mold is disassembled to complete the manufacturing.

[0050] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An ultra-high pressure water inrush blocking device in a tunnel, characterized by: It includes a blocking wall and a plurality of water diversion pipe groups, wherein the blocking wall is sealed and arranged in the tunnel face, the blocking wall includes a plurality of blocking wall blocks, and the plurality of blocking wall blocks are stacked in sequence from bottom to top along the vertical height of the tunnel face to form the blocking wall, the plurality of blocking wall blocks are matched with the plurality of water diversion pipe groups in a one-to-one correspondence, and any of the water diversion pipe groups is arranged in the corresponding blocking wall block; The water diversion pipe group includes a plurality of water diversion pipes, which are arranged on the blocking wall block at equal intervals along the width direction of the blocking wall, the water diversion pipes are arranged perpendicular to the end surface of the blocking wall, and the water diversion pipes penetrate the blocking wall; It also includes a plurality of connecting components, which are matched with a plurality of water diversion pipes in a one-to-one manner. Any of the connecting components is arranged in a corresponding water diversion pipe, and the connecting components can lock or release the sealing matching relationship with the water diversion pipe according to the pressure in the blocking wall; The communication assembly includes a plurality of communication units, which are arranged on the water diversion pipe at equal intervals along the central axis direction of the water diversion pipe, and the plurality of communication units are arranged in the blocking wall to detect the pressure strength of each position of the blocking wall; A plurality of connecting units are arranged on the side wall of the water diversion pipe at equal angles along the central axis direction of the water diversion pipe, and are used to detect the pressure strength of the blocking wall at various angles; The connecting unit includes a first connecting shell with a hollow interior, a second connecting shell, a pressing block and a pressing spring device. The first connecting shell and the second connecting shell are symmetrically arranged on the side walls at both ends of the water diversion pipe. The first connecting shell and the second connecting shell are both interconnected with the interior of the water diversion pipe. The central axis of the first connecting shell and the central axis of the second connecting shell coincide with each other, and the central axis of the first connecting shell and the central axis of the second connecting shell are both perpendicular to the central axis of the water diversion pipe. The pressing block is slidably and sealedly arranged in the first connecting shell along the direction of the central axis of the first connecting shell. The pressing spring device is arranged in the second connecting shell. The two ends of the pressing spring device are respectively connected to the pressing block and the second connecting shell. The pressing block can lock or release its sealing matching relationship with the interior of the water diversion pipe.

2. The ultra-high pressure water inrush blocking device in a tunnel according to claim 1, characterized in that: The force exerted by the pressing spring device on the pressing block is slightly smaller than the minimum force exerted by the pressing spring device on the pressing block when the mud of the blocking wall is normally compacted.

3. The ultra-high pressure water inrush blocking device in a tunnel according to claim 2, characterized in that: The pressing block includes a first stop block, a connecting rod and a second stop block. The second stop block and the first stop block are slidably arranged in the first connecting shell in sequence along the direction from the first connecting shell to the second connecting shell. The two ends of the connecting rod are respectively connected to the first stop block and the second stop block, and the two ends of the pressing spring device are respectively connected to the first stop block and the second connecting shell.

4. The ultra-high pressure water inrush blocking device in a tunnel according to claim 1, characterized in that: When the mud of the blocking wall is compacted normally, the distance of the effective force applied to the pressing block is defined as the effective action length, and the distance between the connecting unit closest to the high-pressure water end and the side wall of the blocking wall in contact with the high-pressure water is equal to the effective action length.

5. The ultra-high pressure water inrush blocking device in a tunnel according to claim 1, characterized in that: The height value of the blocking wall block is equal to the sum of the values ​​of the two effective action lengths, and the water diversion pipe group is arranged through the middle position of the corresponding blocking wall block.

6. A construction method for an ultra-high pressure water gushing plugging device in a tunnel, applicable to the ultra-high pressure water gushing plugging device in a tunnel as claimed in any one of claims 2 to 5, characterized in that: The following steps are involved: S1: Install the mold for making the blocking wall at the tunnel face; S2: Install the connecting component on the corresponding water diversion pipe; S3: installing the water diversion pipe on the mold; S4: injecting grout into the mold to produce the blocking wall block; S5: After the blocking wall block is manufactured, observe the internal state of the water diversion pipe on the corresponding blocking wall block; if the internal state of the water diversion pipe is in a connected state, it means that the blocking wall block is successfully manufactured; if the internal state of the water diversion pipe is in a sealed state, it means that the blocking wall block has failed to be manufactured; S6: If the blocking wall block is successfully manufactured, repeat the above steps S4-S5 until the blocking wall is successfully manufactured; if the blocking wall block fails to be manufactured, it is necessary to break the blocking wall block and re-manufacture it; S7: After the blocking wall is manufactured, the mold is disassembled to complete the manufacturing.

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