CN111595535A - Tunnel joint leakage detection device and using method thereof - Google Patents
Tunnel joint leakage detection device and using method thereof Download PDFInfo
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- CN111595535A CN111595535A CN202010511630.0A CN202010511630A CN111595535A CN 111595535 A CN111595535 A CN 111595535A CN 202010511630 A CN202010511630 A CN 202010511630A CN 111595535 A CN111595535 A CN 111595535A
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- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 112
- 238000010276 construction Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 25
- 239000004568 cement Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000002787 reinforcement Effects 0.000 abstract description 3
- 238000009530 blood pressure measurement Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000007689 inspection Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2853—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipe joints or seals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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Abstract
The invention belongs to the technical field of civil engineering, and particularly relates to a leakage detection device at a tunnel joint and a use method thereof, wherein the device comprises a pressure box which is attached to the outer side of a to-be-detected joint of a tunnel, and a box opening of the pressure box is sealed on the surface of the to-be-detected joint; the device is still including the pressure measurement subassembly that is used for detecting pressure cell pressure, for the water supply installation that the pressure cell provided the water source, water supply installation's export is connected with the water inlet of pressure cell, and this device can detect the seam crossing of concrete tunnel at the construction stage, can discover the seepage problem of seam crossing as early as possible in the construction period, strives for the time for the waterproof reinforcement in tunnel, reduces the seepage maintenance cost in the tunnel later stage.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a tunnel joint leakage detection device and a using method thereof.
Background
The mode that adopts segmentation to pour in the current tunnel construction process is many, and the junction often sets up a seam in order to satisfy the demand that the concrete warp between each section, however the existence of seam crossing buries important hidden danger for the seepage problem in tunnel. Especially, the open-cut lake bottom tunnel which is constructed vigorously in many cities at present is in a waterless state above the tunnel top plate during construction period due to the existence of cofferdams. However, after the cofferdam is removed after the completion, the tunnel top plate is subjected to higher water head pressure, the leakage problem at the position of the tunnel concrete joint is very prominent, and the operation safety of the tunnel at the bottom of the lake is seriously threatened. If the leakage problem can be found early in the construction period, the seepage-proofing technology can be directly adopted for targeted treatment on the construction site, and the later maintenance cost can be greatly saved by carrying out leakage detection in the construction period.
Disclosure of Invention
The invention aims to provide a leakage detection device at a tunnel joint, which can effectively detect the leakage condition of the tunnel joint under the action of water head pressure,
in order to achieve the purpose, the invention adopts the following technical scheme: a leakage detection device for a tunnel joint comprises a pressure box which is used for being attached to the outer side of a joint to be detected in a tunnel, wherein a box opening of the pressure box is sealed on the surface of the joint to be detected;
the device also comprises a pressure detection assembly for detecting the pressure in the pressure cavity to be detected, which is formed by enclosing the seam to be detected and the pressure box, and a water supply device for providing a water source for the pressure box, wherein the outlet of the water supply device is connected with the water inlet of the pressure box.
Preferably, the device further comprises a water collecting tank for collecting water seeping from the joint in the pressure box, and the water collecting tank and the pressure box are attached to two sides of the joint to be detected.
Preferably, the water collecting tank is provided with a draft tube for discharging water in the tank; and the draft tube is connected with a flowmeter for measuring the flow in the tube.
Preferably, the whole pressure box is provided with a box opening on the box bottom, a box opening is downward, and a water inlet is arranged on the box top; the pressure box is provided with convex lugs on at least one pair of outer side surfaces, and through holes for the fastening bolts to penetrate are formed in the lugs.
Preferably, a sealing assembly is arranged at the box opening of the pressure box, and the sealing assembly comprises a sealing ring distributed along the edge of the box opening of the pressure box.
Preferably, the water supply device is a gear type hydraulic pump; the pressure detection assembly is a pressure gauge arranged on the outer side surface of the pressure box.
Preferably, the water collecting tank is in a strip shape, the width of the water collecting tank is larger than the width of the seam to be detected, and the length of the water collecting tank is larger than the length of the box opening of the pressure box along the direction of the seam to be detected; the draft tube is connected to the middle side of the water collecting tank.
Another object of the present invention is to provide a method for using a leakage detection device at a tunnel seam, comprising the following steps:
s1, carrying and transporting equipment: in order to facilitate carrying and transportation processes, the detection device is disassembled and divided into five parts, namely a pressure box, a gear type hydraulic pump, a pressure gauge, a water collecting tank and a tail water pipe;
s2, pre-assembling the components: in a detection construction site, the pressure box, the gear type hydraulic pump and the pressure gauge are assembled and connected, and the water collecting tank is assembled and connected with the tail water pipe;
s3, selecting a detection position: selecting a position of a joint to be detected on the upper top surface of the tunnel;
s4, installing a detection device: aligning the box opening of the pressure box to the seam to be detected for pressing and fitting, screwing a fastening bolt penetrating through the lug, and pressing the box opening of the pressure box on the outer wall surface of the tunnel so as to enable the sealing ring to be in a pressing state; correspondingly installing the water collecting tank on the inner side wall of the tunnel, and simultaneously ensuring that the water collecting tank collects all the seepage water;
s5, water injection detection: firstly, injecting water occupying 1/4-1/3 of the volume in a water collecting tank, then injecting water into the tank by using a gear type hydraulic pump for pressurization until the pressure in the tank reaches a preset pressure, and starting a water closing test;
s6, statistics of permeation flow: in a preset time period, counting the flow and leakage total data of water in the draft tube;
and S7, judging whether the leakage amount of the joint to be detected of the tunnel meets the design requirements or not according to the statistical data.
Preferably, in step S4, glass cement for sealing is uniformly applied along the pressing part of the pressure box and the outer wall surface of the tunnel; in step S5, the predetermined pressure is determined based on the head pressure to which the tunnel is subjected in actual operation.
The invention has the beneficial effects that:
1) the device can detect the joint of the concrete tunnel in the construction stage, can find the leakage problem of the joint as early as possible in the construction period, strives for time for waterproof reinforcement of the tunnel, and reduces the later leakage maintenance cost of the tunnel;
2) the water leaked from the detection joint flows into the tail water pipe after being collected by the water collecting tank, the flow meter measures the leaked water flowing through the tail water pipe, and the detection personnel can clearly and quickly obtain the leakage amount of the detection joint;
3) in order to ensure that the box opening of the pressure box is firmly pressed at the seam to be detected and prevent the pressure box from being separated from the seam to be detected when the water supply device supplies water and pressurizes, the device utilizes the bolt to screw and press the lug on the pressure box on the outer side wall of the tunnel, namely, the pressure box is firmly pressed at the seam to be detected and simultaneously the sealing effect between the pressure box and the outer side wall of the tunnel is also ensured;
4) the sealing ring is made of rubber, when the pressure box is installed, the sealing ring needs to be ensured to be in a compressed state, and the sealing effect between the pressure box and the outer side wall of the tunnel is ensured;
5) this device adopts the modularized design, when carrying and transporting, can disassemble each part, has stronger portability, easily assembles simultaneously between each part, can install the use fast at limited construction site.
Drawings
FIG. 1 is a view of the present invention viewed from the outside of a tunnel in a state of installation and inspection;
FIG. 2 is a view of the present invention viewed from the inside of a tunnel in an installation and inspection state;
FIG. 3 is a schematic structural view of the present invention installed on the outside of a tunnel;
FIG. 4 is a schematic view of a water collection sump structure;
FIG. 5 is a schematic view of the draft tube configuration.
Detailed Description
For the purpose of facilitating understanding, the present invention will be described in detail below with reference to the accompanying drawings.
A kind of tunnel seam leakage detection device, this apparatus includes the pressure cell 10 used for leaning on the outside of seam to be detected in the tunnel, the box mouth of the said pressure cell 10 is sealed in the surface of seam to be detected;
the device also comprises a pressure detection assembly 20 for detecting the pressure in the pressure chamber to be detected, which is formed by enclosing the seam to be detected and the pressure box 10, and a water supply device 30 for providing a water source for the pressure box 10, wherein the outlet of the water supply device 30 is connected with the water inlet of the pressure box 10.
In concrete tunnel construction period, compress tightly the box mouth of pressure cell 10 and seal the lateral surface in detecting the seam crossing, utilize water supply installation 30 to add water to pressure cell 10 and exert pressure, pressure detection subassembly 20 real-time detection record waits to detect the seam crossing and the pressure cell 10 encloses the pressure of closing the pressure intracavity that awaits measuring that forms waiting to detect the pressure of pressure chamber, when waiting to detect the pressure intracavity pressure and reaching the flood peak pressure that receives under the actual operation condition of tunnel, water supply installation 30 stops to supply water to pressure cell 10, observe the inboard seepage condition in the detection seam crossing of tunnel this moment. This device can detect the seam crossing of concrete tunnel in the construction stage, can discover the seepage problem of seam crossing as early as possible in the construction period, strives for the time for the waterproof reinforcement in tunnel, reduces the seepage maintenance cost in tunnel later stage.
In order to collect the leakage water during the detection process and then obtain the leakage amount, the device further comprises a water collecting tank 40 for collecting the water leaked from the joint in the pressure box 10, wherein the water collecting tank 40 and the pressure box 10 are attached to two sides of the joint to be detected.
In order to clearly and rapidly obtain the volume of the leakage water collected in the water collecting tank 40, a draft tube 50 for discharging the water in the tank is provided in the water collecting tank 40. The draft tube 50 is connected to a flow meter 51 for measuring the flow rate in the tube. The water leaking from the detection joint is collected by the water collecting tank 40 and flows into the draft tube 50, the flow meter 51 measures the water leaking through the draft tube 50, and the detection personnel can obtain the leakage amount of the detection joint in real time.
The box opening of the pressure box 10 is arranged on the box bottom, the box opening is downward, and the water inlet is arranged on the box top; the pressure box 10 is provided with convex lugs 11 on at least one pair of outer side surfaces, and the lugs 11 are provided with through holes for the fastening bolts to penetrate through. In order to ensure that the box opening of the pressure box 10 is firmly pressed at the seam to be detected and prevent the pressure box 10 from being separated from the seam to be detected when the water supply device 30 supplies water and pressurizes, the device utilizes the bolt to screw and press the lug 11 on the pressure box 10 on the outer side wall of the tunnel, namely, the box opening of the pressure box 10 is firmly pressed at the seam to be detected and simultaneously the sealing effect between the pressure box 10 and the outer side wall of the tunnel is also ensured.
In order to further ensure the sealing between the pressure box 10 and the outer side wall of the tunnel and prevent the pressure water in the pressure box 10 from seeping out from the joint part between the pressure box 10 and the outer side wall of the tunnel, a sealing assembly is arranged at the box opening of the pressure box 10, and comprises a sealing ring 12 arranged along the box opening edge of the pressure box 10. The sealing ring 12 is made of rubber, and when the pressure cell 10 is installed, the sealing ring 12 needs to be in a compressed state, so that the sealing effect of the sealing ring 12 is ensured.
The water supply device 30 is a gear type hydraulic pump, the pressurizing mode of the gear type hydraulic pump can adapt to various pressure working conditions possibly faced in the tunnel construction period, the gear type hydraulic pump is small in size, the required water quantity is small during pressurizing water supply, and compared with the traditional pouring and irrigating mode, the water supply device conforms to water resources. The pressure detecting unit 20 is a pressure gauge installed on the outer side surface of the pressure cell 10.
The water collecting tank 40 is in a strip shape, the width of the water collecting tank 40 is larger than the width of the seam to be detected, and the length of the water collecting tank 40 is larger than the length of the box opening of the pressure box 10 along the direction of the seam to be detected; the draft tube 50 is connected at a middle side position of the sump 40.
A method for using a leakage detection device at a tunnel joint comprises the following steps:
s1, carrying and transporting equipment: in order to facilitate carrying and transportation processes, the detection device is disassembled and divided into five parts, namely a pressure box 10, a gear type hydraulic pump, a pressure gauge, a water collecting tank 40 and a tail water pipe 50;
s2, pre-assembling the components: in a detection construction site, the pressure box 10, the gear type hydraulic pump and the pressure gauge are assembled and connected, and the water collecting tank 40 is assembled and connected with the tail water pipe 50;
s3, selecting a detection position: selecting a position of a joint to be detected on the upper top surface of the tunnel;
s4, installing a detection device: aligning the box opening of the pressure box 10 to the seam to be detected for pressing and jointing, screwing a fastening bolt penetrating through the lug 11, pressing the box opening of the pressure box 10 on the outer wall surface of the tunnel, and enabling the sealing ring 12 to be in a pressing state; correspondingly installing the water collecting tank 40 on the inner side wall of the tunnel, and simultaneously ensuring that the water collecting tank 40 collects all the seepage water;
s5, water injection detection: firstly, injecting water occupying 1/4-1/3 of the volume in the water collecting tank 40, then injecting water into the tank by using a gear type hydraulic pump for pressurization until the pressure in the tank reaches a preset pressure, and starting a water closing test;
s6, statistics of permeation flow: counting the flow and leakage total data of water in the draft tube 50 within a preset time period;
and S7, judging whether the leakage amount of the joint to be detected of the tunnel meets the design requirements or not according to the statistical data.
In step S4, glass cement for sealing is uniformly applied along the pressing position of the pressure cell 10 and the outer wall surface of the tunnel, so as to further ensure the sealing effect of the pressing position; in step S5, the predetermined pressure is determined based on the head pressure to which the tunnel is subjected in actual operation.
This device adopts the modularized design, when carrying and transporting, can disassemble each part, has stronger portability, easily assembles simultaneously between each part, can install the use fast at limited construction place. And because its small, the structure is succinct, possess wider application scope.
Claims (9)
1. The device for detecting the leakage at the joint of the tunnel is characterized by comprising a pressure box (10) which is used for being attached to the outer side of a joint to be detected of the tunnel, wherein the box opening of the pressure box (10) is sealed on the surface of the joint to be detected;
the device also comprises a pressure detection assembly (20) for detecting the pressure in a pressure chamber to be detected, which is formed by enclosing the seam to be detected and the pressure box (10), and a water supply device (30) for providing a water source for the pressure box (10), wherein the outlet of the water supply device (30) is connected with the water inlet of the pressure box (10).
2. A tunnel seam leak detector according to claim 1, characterised in that it further comprises a water collection trough (40) for collecting water seeping from the seam in the pressure cell (10), said water collection trough (40) and the pressure cell (10) abutting against both sides of the seam to be detected.
3. A tunnel seam leakage detection device according to claim 2, characterized in that said water collection tank (40) is provided with a draft tube (50) for discharging water in the tank; and a flowmeter (51) for measuring the flow in the pipe is connected to the draft tube (50).
4. A tunnel seam leak detector as claimed in claim 1, characterised in that the pressure cell (10) has a cell mouth opening at the bottom of the cell and a downwardly facing inlet opening at the top of the cell; convex lugs (11) are arranged on at least one pair of outer side surfaces of the pressure box (10), and through holes for fastening bolts to penetrate through are formed in the lugs (11).
5. The apparatus for detecting leakage at a tunnel seam according to claim 4, wherein a sealing assembly is provided at the mouth of the pressure cell (10), and the sealing assembly comprises a sealing ring (12) arranged along the edge of the mouth of the pressure cell (10).
6. The tunnel seam leakage detection device according to claim 1, wherein said water supply device (30) is a gear type hydraulic pump; the pressure detection assembly (20) is a pressure gauge arranged on the outer side surface of the pressure box (10).
7. The device for detecting the leakage at the seam of the tunnel according to claim 3, wherein the water collecting tank (40) is long, the width of the water collecting tank (40) is larger than the width of the seam to be detected, and the length of the water collecting tank (40) is larger than the length of the box opening of the pressure box (10) along the direction of the seam to be detected; the draft tube (50) is connected to the middle side position of the water collecting tank (40).
8. The use method of the leakage detection device at the tunnel joint according to any one of claims 1 to 7, characterized by comprising the following steps:
s1, carrying and transporting equipment: in order to facilitate carrying and transportation processes, the detection device is disassembled and divided into a pressure box (10), a gear type hydraulic pump, a pressure gauge, a water collecting tank (40) and a tail water pipe (50);
s2, pre-assembling the components: in a detection construction site, the pressure box (10), the gear type hydraulic pump and the pressure gauge are assembled and connected, and the water collecting tank (40) is assembled and connected with the tail water pipe (50);
s3, selecting a detection position: selecting a position of a joint to be detected on the upper top surface of the tunnel;
s4, installing a detection device: aligning the box opening of the pressure box (10) to the seam to be detected for pressing and attaching, screwing the fastening bolt penetrating through the lug (11), pressing the box opening of the pressure box (10) on the outer wall surface of the tunnel, and enabling the sealing ring (12) to be in a pressing state; correspondingly installing the water collecting tank (40) on the inner side wall of the tunnel, and simultaneously ensuring that the water collecting tank (40) collects all the seepage water;
s5, water injection detection: firstly, injecting water occupying 1/4-1/3 of the volume in a water collecting tank (40), then injecting water into the tank by using a gear type hydraulic pump for pressurizing until the pressure in the tank reaches a preset pressure, and starting a water closing test;
s6, statistics of permeation flow: in a preset time period, counting the flow and leakage total data of water in the draft tube (50);
and S7, judging whether the leakage amount of the joint to be detected of the tunnel meets the design requirements or not according to the statistical data.
9. The method of using a tunnel seam leak detector apparatus in accordance with claim 8, wherein: in step S4, glass cement for sealing is evenly coated along the pressing part of the pressure box (10) and the outer wall surface of the tunnel; in step S5, the predetermined pressure is determined based on the head pressure to which the tunnel is subjected in actual operation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010511630.0A CN111595535A (en) | 2020-06-08 | 2020-06-08 | Tunnel joint leakage detection device and using method thereof |
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| CN202010511630.0A CN111595535A (en) | 2020-06-08 | 2020-06-08 | Tunnel joint leakage detection device and using method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924105A (en) * | 2021-01-25 | 2021-06-08 | 马鞍山十七冶工程科技有限责任公司 | Device and method for waterproof detection of joint of comprehensive pipe gallery |
| CN113029451A (en) * | 2021-03-29 | 2021-06-25 | 山东大学 | Shield segment joint water leakage experiment device and method |
| CN113931697A (en) * | 2021-09-22 | 2022-01-14 | 中国建筑第八工程局有限公司 | Tunnel water seepage early warning device and tunnel water seepage monitoring and processing method |
| CN116973038A (en) * | 2023-09-25 | 2023-10-31 | 爱德曼氢能源装备有限公司 | Testing device for parts of fuel cell system |
-
2020
- 2020-06-08 CN CN202010511630.0A patent/CN111595535A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924105A (en) * | 2021-01-25 | 2021-06-08 | 马鞍山十七冶工程科技有限责任公司 | Device and method for waterproof detection of joint of comprehensive pipe gallery |
| CN113029451A (en) * | 2021-03-29 | 2021-06-25 | 山东大学 | Shield segment joint water leakage experiment device and method |
| CN113931697A (en) * | 2021-09-22 | 2022-01-14 | 中国建筑第八工程局有限公司 | Tunnel water seepage early warning device and tunnel water seepage monitoring and processing method |
| CN116973038A (en) * | 2023-09-25 | 2023-10-31 | 爱德曼氢能源装备有限公司 | Testing device for parts of fuel cell system |
| CN116973038B (en) * | 2023-09-25 | 2024-01-02 | 爱德曼氢能源装备有限公司 | Testing device for parts of fuel cell system |
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