CN112053619A - Device for simulating pressure water seepage of tunnel lining crack and using method thereof - Google Patents
Device for simulating pressure water seepage of tunnel lining crack and using method thereof Download PDFInfo
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- CN112053619A CN112053619A CN202010990072.0A CN202010990072A CN112053619A CN 112053619 A CN112053619 A CN 112053619A CN 202010990072 A CN202010990072 A CN 202010990072A CN 112053619 A CN112053619 A CN 112053619A
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Abstract
The invention discloses a device for simulating the pressure water seepage of a tunnel lining crack and a use method thereof, wherein a pressurizing device is used for pressurizing the back of concrete of the crack, and then an infrared thermal imager is used for observing the seepage areas at different time, different water pressure, different crack forms and different water temperatures, an embedded member is arranged in the concrete, so that the water seepage phenomenon in the simulation process can be avoided, the embedded member is buckled in the concrete to form constraint, and the pressure of the back pressurizing device can be resisted, thus no external constraint is needed, the experiment site is flexible, the seepage situations of the tunnel lining at different positions and under different conditions can be simulated, the seepage flow and the seepage areas under different conditions can be observed, and guidance is provided for the rapid and accurate judgment and analysis of the seepage water of the tunnel lining. The invention can simulate the water seepage situation of the tunnel lining at different positions and under different conditions, can observe the seepage quantity and the seepage area under different conditions, provides guidance for quickly and accurately judging and analyzing the water seepage of the tunnel lining, and has stable and reliable performance.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a device for simulating pressure water seepage of a tunnel lining crack and a using method thereof.
Background
In recent years, a large number of highway tunnels and railway tunnels are built in China, but with continuous development of underground spaces, diseases in the tunnels are exposed continuously, and the most common problems of cracking of linings and water leakage are endangering the safety of the tunnels. The initial destructive detection means such as drilling detection gradually quits the consideration range of people due to the reasons of low detection precision, low detection speed, direct damage to tunnel walls and the like, and the current tunnel lining disease detection methods are mainly nondestructive detection methods such as an ultrasonic method, a geological radar method, infrared thermal imaging and the like. In the aspect of detecting tunnel water seepage, the infrared thermal imaging technology has obvious advantages.
CN108663121A discloses an online monitoring and detecting system for tunnel water seepage, which utilizes an infrared camera to sense the distribution of the surface temperature of an object, compares the development and change of a thermal image on the surface of a tunnel, and thereby determines whether the part is water seepage or not, and makes corresponding solutions. However this method can only detect the water-seepage area,
CN108419045B discloses a monitoring method and device based on infrared thermal imaging technology, in which an alarm rule is preset by performing infrared scanning on a monitored area, so as to alarm an abnormal pixel point and determine a monitoring point triggering an abnormality in the monitored area.
The two methods use the thermal infrared imager to measure the temperature to achieve the detection purpose. However, in actual sites, the problem of water leakage is solved only by knowing the temperature and the specific position of the water leakage position.
Disclosure of Invention
The invention provides a device for simulating the pressure water seepage of a tunnel lining crack and a use method thereof.
The technical scheme of the invention is realized as follows:
a device for simulating pressure water seepage of a tunnel lining crack comprises a lining crack simulation device and an installation and experiment simulation device of a pressurizing device, wherein the lining crack simulation device comprises a concrete block with designated crack width, length and depth, the installation and experiment simulation device of the pressurizing device comprises the pressurizing device, the pressurizing device comprises a concrete mold, an embedded part, an iron disc, a sealing ring, a glass tube, a pressure gauge, a water tank and an air compressor, an infrared thermal imager and a triangular bracket are arranged in a plane far away from the pressurizing device, the sealing ring is provided with a large sealing ring and a small sealing ring, a scale mark is arranged on the glass tube, the pressurizing device is arranged on the side surface of the concrete block, the concrete block is arranged on one side of the upper part of the air compressor, cotton cloth and the embedded part for simulating cracks are arranged in the concrete block, one end of the embedded part is connected with the cotton cloth for simulating cracks, the other end of the water tank is connected with the water tank through a large sealing ring, a pressure gauge is arranged on the side face of the water tank, a pipeline is connected to the end portion of the water tank and connected with the steel pipe barrel through a flange plate, the top of the steel pipe barrel is connected with a short pipe, the short pipe is connected with an air compressor, and the thermal infrared imager is fixed on a triangular support.
In the device for simulating the pressure water seepage of the tunnel lining cracks, cotton cloth for simulating the cracks is fixed before the concrete block is poured, and the size of the cotton cloth for simulating the cracks is the size of the lining cracks.
In the device for simulating the pressure water seepage of the tunnel lining cracks, the pressurizing equipment is tightly connected with the concrete block and can simulate the water pressure action behind the lining, the concrete block is internally provided with the reinforcing steel bars, and the concrete block is placed on the abutment.
In the device for simulating the pressure water seepage of the tunnel lining cracks, the water tank is connected with the air compressor and can control the water pressure value, the pressure gauge can monitor the water level in real time, and the end opening of the embedded part is provided with the iron disc.
The device for simulating the pressure water seepage of the tunnel lining cracks and the using method thereof comprise the following steps:
1) manufacturing a concrete block by using a customized mould, sleeving an embedded part before pouring the test block, connecting the embedded part with an iron plate, fixing cotton cloth and steel bars for simulating cracks during pouring, confirming that the cotton cloth for simulating the cracks does not shift after pouring is finished, removing a template and the iron plate after 24 hours, and then maintaining for 28 days;
2) after curing is finished, after the concrete reaches specified strength, connecting the protruding part of the embedded part with a sealing ring, a water tank and a pipeline to form a sleeve, embedding a glass tube with scales into the sleeve and the pipeline, and then connecting short tubes, wherein the connecting parts are all in flange connection;
3) erecting an infrared thermal imager right in front of the concrete block, ensuring the instrument to be horizontally placed through a level gauge, measuring the distance between the infrared thermal imager and the test block, and then starting a video recording function of the infrared thermal imager to record video;
4) adding water into the connected water tank, adding the water level to the uppermost scale visible on the glass tube, simultaneously opening the pressure gauge, measuring the water temperature, and recording the scale, the pressure and the temperature at the moment;
5) starting pressurization after the air compressor is connected with the short pipe, keeping constant pressure for a period of time after each pressurization, reading the scales of the glass tube once per unit time, and recording the seepage flow until the maximum pressure is added;
6) and (4) arranging the data, including the width of the test block crack, the seepage flow rate at different water pressures, the seepage area displayed by the thermal infrared imager, the temperature and the like, and finally obtaining the relation between the seepage flow rate, the seepage area, the crack width and the water pressure.
The device for simulating the pressure water seepage of the tunnel lining crack and the use method thereof have the following beneficial effects: the present case sets up the built-in fitting, not only can full play concrete and steel's cohesive strength, can also utilize the resistance to pressure of concrete, overcome the counter-force that the test block pressurizes behind the back and produce, rubber seal is put into to built-in fitting and water tank joint gap, in order to reach impervious effect, this has just realized controlling different pressure and crack width, be used for observing infrared thermal imaging and seepage flow under different pressure and the crack width, the use place is unrestricted and can the controlled variable, the problem of artificial control simulation tunnel lining crack infiltration like this, the device operation is very simple and convenient, especially, be fit for the needs in laboratory.
Drawings
FIG. 1 is a schematic view of a device for simulating water seepage under pressure in a tunnel lining crack according to the present invention;
FIG. 2 is a schematic view of a concrete block making mold according to the present invention;
FIG. 3 is a schematic view showing the structure of a concrete block according to the present invention;
fig. 4 is a schematic structural view of the pressurizing apparatus of the present invention.
In the figure: the device comprises a concrete mould 1, an embedded part 2, an iron disc 3, a steel bar 4, cotton cloth 5 simulating cracks, a concrete block 6, a large sealing ring 7, a water tank 8, a pressure gauge 9, a pipeline 10, a small sealing ring 11, a steel tube 12, a short tube 13, a glass tube 14, an infrared thermal imager 15, a triangular support 16, an air compressor 17, an abutment 18 and scale marks 19.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The device for simulating the pressure water seepage of the tunnel lining cracks comprises a lining crack simulation device and a pressurizing device installation and experiment simulation device, wherein the lining crack simulation device comprises a concrete block 6 with specified crack width, length and depth, the pressurizing device installation and experiment simulation device comprises a pressurizing device, the pressurizing device comprises a concrete mold 1, an embedded part 2, an iron disc 3, a sealing ring, a glass tube 14, a pressure gauge 9, a water tank 8 and an air compressor 17, an infrared thermal imager 15 and a triangular bracket 16 are arranged in a plane far away from the air compressor 17, the infrared thermal imager 15 is a common device in the market, the pressurizing device can load specified back water pressure value on the concrete block 6 with cracks, the sealing ring is provided with a large sealing ring 7 and a small sealing ring 11, the glass tube 14 is provided with a scale mark 19, the pressurizing device is arranged on the side face of the concrete block 6, the concrete block 6 is arranged on one side of the upper part of the air compressor 17, the air compressor 17 is common equipment in the market, cotton cloth 5 simulating cracks and an embedded part 2 are arranged in the concrete block 1, the cotton cloth 5 simulating cracks is made of chemical fiber materials, one end of the embedded part 2 is connected with the cotton cloth 5 simulating cracks, the other end of the embedded part is connected with a water tank 8 through a large sealing ring 7, a pressure gauge 9 is arranged on the side surface of the water tank 8, a pipeline 10 is connected to the end part of the water tank 8, the pipeline 10 plays a role in limiting flow, the pipeline 10 is connected with a steel pipe barrel 12 through a flange, the top of the steel pipe barrel 12 is connected with a short pipe 13, an infrared thermal imager 15 is fixed on a triangular support 16, the cotton cloth 5 simulating cracks is fixed before the concrete block 6 is poured, the size of the cotton cloth 5 simulating cracks is the size of lining cracks, and a pressurizing device, the device can simulate the water pressure effect behind a lining, the reinforcing steel bars 4 are arranged inside the concrete blocks 6, the reinforcing steel bars 4 and the embedded parts 2 are placed inside the concrete blocks 2 in advance when concrete is poured, the concrete blocks 6 are placed on the abutment 18, the water tank 8 is connected with the air compressor 17 and can control the water pressure value, the pressure gauge 9 can monitor the water level in real time, the iron plate 3 is arranged at the port of the embedded parts 2, and the device simulates the pressure water seepage of a tunnel lining crack and the using method thereof, and the device comprises the following steps:
1) manufacturing a concrete block 6 by using a customized mould, sleeving an embedded part 2 before pouring a test block, connecting the embedded part 2 with an iron plate 3, fixing a cotton cloth 5 and a reinforcing steel bar 4 for simulating a crack during pouring, confirming that the cotton cloth for simulating the crack does not shift after pouring is finished, removing a template and the iron plate 3 after 24 hours, and then maintaining for 28 days;
2) after curing is finished, after the concrete reaches specified strength, connecting the protruding part of the embedded part 2 with a sealing ring and a water tank 8, connecting a pipeline 10 with a sleeve, embedding a glass tube 14 with scales 19 into the sleeve and the pipeline, and then connecting short pipes 13 (the glass tube 14 is embedded into the pipeline 10, the steel tube 12 and the short pipes 13 at the same time), wherein the connecting parts are all flange connections;
3) erecting a thermal infrared imager 15 right in front of the concrete block 6, ensuring the instrument to be horizontally placed through a level gauge, measuring the distance between the thermal infrared imager 15 and the concrete block 6, and then starting a video recording function of the thermal infrared imager 15 to record video;
4) adding water into the connected water tank 8, adding the water level to the position of the uppermost scale mark 19 visible on the glass tube 14, simultaneously opening the pressure gauge 9, measuring the water temperature, and recording the scale, the pressure and the temperature at the moment;
5) the air compressor 17 starts to pressurize after being connected with the short pipe 13, keeps the pressure constant for a period of time after each pressurization, reads the scales of the glass tube 14 once per unit time, and records the seepage until the maximum pressure is added;
6) the data are sorted, including the crack width of the concrete block 6, the seepage flow rate at different water pressures, the seepage area displayed by the thermal infrared imager 15, the temperature and the like (the video data of the thermal infrared imager 15 can be led into a computer, and the seepage area is calculated by utilizing the number of pixel points of the low-temperature area), and finally the relation between the seepage flow rate, the seepage area, the crack width and the water pressure is obtained.
The working principle of the invention is as follows: the lining crack simulation device refers to manufacturing a concrete block with specified crack width, length and depth; the pressurizing device can load a specified water pressure value on the back of the cracked concrete block, and consists of an embedded part, a sealing ring and a water tank; the test simulation method comprises the steps of pressurizing the back of a concrete block with cracks through a pressurizing device, and observing the seepage areas at different time, different water pressures, different crack forms and different water temperatures through a thermal infrared imager. The embedded members are installed in the concrete, so that the water seepage phenomenon in the simulation process can be avoided, the embedded members are buckled in the concrete block to form constraint, the pressure of a back pressurizing device can be resisted, external constraint is not needed, the experiment site is flexible, and the method can provide guidance for rapid and accurate judgment and analysis of the tunnel lining water seepage when applied to an indoor experiment. The anti-seepage device can resist the counter force generated by water pressure without fixing a test piece during pressurization, has good anti-seepage effect, no limit on test site and low test cost. Thus, the object of the present invention is accomplished.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A device for simulating pressure water seepage of a tunnel lining crack comprises a lining crack simulation device and a pressurizing device installation and experiment simulation device, and is characterized in that the lining crack simulation device comprises a concrete block with designated crack width, length and depth, the pressurizing device installation and experiment simulation device comprises a pressurizing device, the pressurizing device comprises a concrete mold, an embedded part, an iron disc, a sealing ring, a glass tube, a pressure gauge, a water tank and an air compressor, an infrared thermal imager and a triangular bracket are arranged in a plane far away from the pressurizing device, the sealing ring is provided with a large sealing ring and a small sealing ring, scale marks are arranged on the glass tube, the pressurizing device is arranged on the side surface of the concrete block, the concrete block is arranged on one side of the upper part of the air compressor, cotton cloth and the embedded part for simulating cracks are arranged in the concrete block, the thermal infrared imager is characterized in that one end of the embedded part is connected with the cotton cloth simulating cracks, the other end of the embedded part is connected with the water tank through a large sealing ring, a pressure gauge is arranged on the side face of the water tank, the end portion of the water tank is connected with a pipeline, the pipeline protrudes out of the end portion of the water tank, the pipeline is connected with the steel pipe barrel through a flange plate, the top of the steel pipe barrel is connected with a short pipe, the short pipe is connected with an air compressor, and the thermal infrared imager is.
2. The device for simulating the pressure seepage of the cracks of the tunnel lining according to claim 1, wherein cotton cloth for simulating the cracks is fixed before the concrete block is poured, and the size of the cotton cloth for simulating the cracks is the same as that of the cracks of the concrete block.
3. The apparatus of claim 1, wherein the pressurizing means is closely connected to the concrete block and can simulate the hydraulic pressure action behind the lining, the concrete block is provided with steel bars inside, and the concrete block is placed on the abutment.
4. The device for simulating the pressure water seepage of the tunnel lining cracks as claimed in claim 1, wherein the water tank is connected with an air compressor and can control the water pressure value, the pressure gauge can monitor the water level in real time, and an iron disc is arranged at the port of the embedded part.
5. The device for simulating the pressure water seepage of the tunnel lining cracks and the use method thereof according to claim 1 are characterized by comprising the following steps:
1) manufacturing a concrete block by using a customized mould, sleeving an embedded part before pouring the test block, connecting the embedded part with an iron plate, fixing cotton cloth and steel bars for simulating cracks during pouring, confirming that the cotton cloth for simulating the cracks does not shift after pouring is finished, removing a template and the iron plate after 24 hours, and then maintaining for 28 days;
2) after curing is finished, after the concrete reaches specified strength, connecting the protruding part of the embedded part with a large sealing ring, a water tank and a pipeline to form a sleeve, embedding a glass tube with scale marks into the sleeve and the pipeline, and then connecting short tubes, wherein the connecting parts are all in flange connection;
3) erecting an infrared thermal imager right in front of the test block, ensuring the instrument to be horizontally placed through a level gauge, measuring the distance between the infrared thermal imager and the test block, and then starting a video recording function of the infrared thermal imager to record video;
4) adding water into the connected water tank, adding the water level to the uppermost scale visible on the glass tube, simultaneously opening the pressure gauge, measuring the water temperature, and recording the scale, the pressure and the temperature at the moment;
5) starting pressurization after the air compressor is connected with the short pipe, keeping constant pressure for a period of time after each pressurization, reading the scales of the glass tube once per unit time, and recording the seepage flow until the maximum pressure is added;
6) and (4) arranging the data, including the width of the test block crack, the seepage flow rate at different water pressures, the seepage area displayed by the thermal infrared imager, the temperature and the like, and finally obtaining the relation between the seepage flow rate, the seepage area, the crack width and the water pressure.
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| CN202010990072.0A CN112053619A (en) | 2020-09-18 | 2020-09-18 | Device for simulating pressure water seepage of tunnel lining crack and using method thereof |
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| CN202010990072.0A CN112053619A (en) | 2020-09-18 | 2020-09-18 | Device for simulating pressure water seepage of tunnel lining crack and using method thereof |
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Cited By (3)
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| CN113109238A (en) * | 2021-04-30 | 2021-07-13 | 中国铁路南宁局集团有限公司 | Device for simulating pressure water seepage of tunnel lining crack and simulation method thereof |
| CN114033487A (en) * | 2021-11-05 | 2022-02-11 | 中铁西南科学研究院有限公司 | On-site testing method for testing drainage performance of drainage-preventing structure of tunnel construction joint |
| CN115326664A (en) * | 2022-06-24 | 2022-11-11 | 石家庄铁道大学 | Mine method assembly type inverted arch circumferential joint anti-permeability capacity full-scale test method |
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