CN116818497A - Test loading device for tunnel load - Google Patents
Test loading device for tunnel load Download PDFInfo
- Publication number
- CN116818497A CN116818497A CN202310762224.5A CN202310762224A CN116818497A CN 116818497 A CN116818497 A CN 116818497A CN 202310762224 A CN202310762224 A CN 202310762224A CN 116818497 A CN116818497 A CN 116818497A
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- air bag
- air
- tunnel
- loading device
- supply system
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- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000002131 composite material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a test loading device for tunnel load, which relates to the technical field of tunnel load tests and comprises an outer frame, an outer air bag, a test piece, an inner air bag, an air supply system and a controller, wherein the outer frame is provided with a plurality of air inlets; the inner wall of the outer frame is annular, the outer air bag is arranged on the inner side of the outer frame, the outer air bag is annular, the test piece is arranged on the inner side of the outer air bag, and the inner air bag is arranged on the inner side of the test piece; the air supply system is communicated with the outer air bag and the inner air bag and is used for supplying air to the outer air bag and the inner air bag; the air supply system is electrically connected with the controller. According to the test loading device for tunnel load, the air bag is used for applying pressure to the test piece, and the air supply system is used for adjusting the pressure of the air bag to change the pressure to the test piece, so that various load conditions can be rapidly and accurately simulated.
Description
Technical Field
The invention relates to the technical field of tunnel load tests, in particular to a test loading device for tunnel load.
Background
Tunnel lining refers to a permanent structure that supports and maintains long-term stability and durability of a tunnel. The function is as follows: support and maintain stability of tunnels; keeping the space required by the running of the train; preventing the weathering of surrounding rock; and the influence of groundwater is relieved. Thus, tunnel liners must have sufficient strength, durability, and some resistance to freezing, penetration, and erosion. The tunnel lining mainly comprises arch rings, side walls, inverted arches and a bottom plate.
The tunnel lining mainly comprises an integral lining, a composite lining, a spray anchor lining, an assembled lining and a multi-arch lining. With the development of high-speed railways in China, the total extension of the high-speed railway tunnels is further increased. In China, a composite lining structure is adopted for high-speed railway tunnels, and the type of tunnels are affected by factors such as bad geological conditions, construction process, tooling equipment and the like in the construction process, so that lining cracking, blocking, water leakage and other disease forms are unavoidable.
The whole ring experiment of the ring tunnel lining is an important method for the stress performance of the tunnel structure.
The patent with publication number CN108801577A discloses a model test device for operating the evolution law of the tunnel lining disease of a highway, which comprises: the tunnel lining model pouring system is used for pouring a formed lining and forming cavities and cracks on the lining; the tunnel surrounding rock pouring system is used for pouring formed surrounding rocks, and lining placing spaces are reserved in the surrounding rocks; the tunnel burial loading system is used for pressurizing the top of the surrounding rock; a tunnel surrounding pressure loading system for pressurizing the surrounding rock periphery; the automobile load simulation system is used for impacting the bottom of the lining; a monitoring system comprising strain gages, soil pressure sensors, monitors and crack observers. The invention also discloses a model test method for operating the evolution law of the tunnel lining damage of the highway. The invention has simple structure and convenient operation, can perform defect prefabrication of the defect tunnel lining, ground stress of the highway tunnel and load simulation of the operation highway tunnel automobile, can be applied to various working conditions of the highway tunnel, and has high accuracy and wide application range.
In the above patent, the surrounding rock is pressurized by the elastic water bag to simulate the ground stress environment of the actual highway tunnel. Although the elastic water bag can provide relatively uniform pressure, the pressure is difficult to adjust, and the elastic water bag is difficult to be suitable for tunnel lining tests of different dimensions and different service environments.
Disclosure of Invention
In order to solve the technical problems, the invention provides the test loading device for the tunnel load, which is simpler in pressure adjustment and suitable for the tests of tunnel linings with different dimensions and different use environments.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a test loading device for tunnel load, which comprises an outer frame, an outer air bag, a test piece, an inner air bag, an air supply system and a controller, wherein the outer frame is provided with a plurality of air inlets; the inner wall of the outer frame is annular, the outer air bag is arranged on the inner side of the outer frame, the outer air bag is an annular air bag, the test piece is arranged on the inner side of the outer air bag, and the inner air bag is arranged on the inner side of the test piece; the air supply system is communicated with the outer air bag and the inner air bag and is used for supplying air to the outer air bag and the inner air bag; the air supply system is electrically connected with the controller.
Optionally, the inner air bag is an annular air bag, and a center support is arranged on the inner side of the inner air bag.
Optionally, the center support is a solid steel column or a cement column or a thick-wall steel tube.
Optionally, the outer air bag and the inner air bag comprise a plurality of sub-air bags, and each sub-air bag is provided with an air outlet, an air inlet, a pressure relief opening and a pressure sensor; the air inlet is connected with the air supply system, and the pressure sensor is electrically connected with the controller.
Optionally, the exhaust port is provided with an electric control exhaust valve, and the electric control exhaust valve is electrically connected with the controller.
Optionally, the pressure relief opening is provided with a safety valve.
Optionally, the air supply system comprises an air compressor and a pressure regulating valve, an air outlet of the air compressor is communicated with an air inlet end of the pressure regulating valve, and an air outlet end of the pressure regulating valve is communicated with the outer air bag and the inner air bag.
Optionally, the air supply system includes a plurality of air-regulating valves, the outer air bag and the inner air bag each include a plurality of sub-air bags, and an air outlet end of each air-regulating valve is respectively communicated with one sub-air bag.
Optionally, the outer frame includes a plurality of arc, connects through fastening bolt between the adjacent arc.
Compared with the prior art, the invention has the following technical effects:
the invention relates to a test loading device for tunnel load, which mainly comprises an outer frame, an outer air bag, a test piece, an inner air bag, an air supply system and a controller, wherein the outer frame is arranged on the outer air bag; the pressure is applied to the test piece through the air bag, and the pressure of the air bag is adjusted through the air supply system so as to change the pressure to the test piece, so that various load conditions can be simulated rapidly and accurately.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a test loading device for tunnel load according to the present invention.
Reference numerals illustrate: 1. an outer frame; 2. an outer balloon; 3. a test piece; 4. a fastening bolt; 5. an inner balloon; 6. a center support; 7. a pressure sensor; 8. an exhaust port; 9. an air inlet; 10. a pressure relief port; 11. a controller; 12. an air compressor; 13. and a pressure regulating valve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the present embodiment provides a test loading device for tunnel load, comprising an outer frame 1, an outer air bag 2, a test piece 3, an inner air bag 5, an air supply system and a controller 11; the inner wall of the outer frame 1 is annular, the outer air bag 2 is arranged on the inner side of the outer frame 1, the outer air bag 2 is annular, the test piece 3 is arranged on the inner side of the outer air bag 2, and the inner air bag 5 is arranged on the inner side of the test piece 3; the air supply system is communicated with the outer air bag 2 and the inner air bag 5 and is used for supplying air to the outer air bag 2 and the inner air bag 5; the air supply system is electrically connected with the controller 11.
The air supply system is controlled by the controller 11 to realize the pressure control of the outer air bag 2 and the inner air bag 5, achieve the technical effect of controlling the simulated load, and realize the comprehensive simulation of different loads on the inner side and the outer side of the tunnel by changing the pressures of the outer air bag 2 and the inner air bag 5, so that the simulation test is more fit with the actual condition.
In this embodiment, the inner balloon 5 is an annular balloon, and a center support 6 is provided inside the inner balloon 5. The center support 6 is used for supporting the inner side of the inner air bag 5, preventing friction and extrusion between the inner air bag walls of the inner air bag 5, effectively protecting the inner air bag 5, and enabling the inner air bag 5 to provide more accurate load for the test piece 3.
The center support 6 may be a solid steel column or a cement column or a thick-walled steel tube. The outer diameter of the center support 6 is such that the inner bag 5 can be completely deployed, and the inner side of the inner bag 5 is prevented from being squeezed and wrinkled.
The outer air bag 2 and the inner air bag 5 comprise a plurality of sub-air bags, and each sub-air bag is provided with an air outlet 8, an air inlet 9, a pressure relief opening 10 and a pressure sensor 7; the air inlet 9 is connected with an air supply system, and the pressure sensor 7 is electrically connected with the controller 11. The number of the sub-airbags may be even or odd, so that the situation that the periphery of the test piece 3 is uniformly loaded can be simulated, and the method can be used for simulating the situation that only one side of the test piece 3 is loaded. If one side of the tunnel is provided with a higher mountain, and the other side is shorter or is close to a valley, an odd number of sub-air bags are adopted, so that one side of the test piece 3 has higher load in a certain direction, and the load of the rest parts is lower.
The exhaust port 8 is provided with an electric control exhaust valve which is electrically connected with the controller 11. The pressure relief port 10 is provided with a relief valve. The air supply system comprises an air compressor 12 and a pressure regulating valve 13, an air outlet of the air compressor is communicated with an air inlet end of the pressure regulating valve 13, and an air outlet end of the pressure regulating valve 13 is communicated with the outer air bag 2 and the inner air bag 5. The air supply system comprises a plurality of pressure regulating valves 13, the outer air bag 2 and the inner air bag 5 comprise a plurality of sub-air bags, and the air outlet end of each pressure regulating valve 13 is respectively communicated with one sub-air bag.
The pressure sensor 7 is used for collecting the pressure of each sub-air bag, the controller 11 is used for setting and monitoring the pressure of each sub-air bag, the safety valve can limit the highest pressure of the sub-air bag, damage of the sub-air bag caused by overhigh pressure is avoided, and the controller 11 is used for controlling the electric control exhaust valve to exhaust each sub-air bag, so that the load change control is realized.
The outer frame 1 comprises a plurality of arc plates, and adjacent arc plates are connected through fastening bolts 4.
It should be noted that it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
The above description of the embodiments is only for aiding in the understanding of the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (9)
1. The test loading device for tunnel load is characterized by comprising an outer frame, an outer air bag, a test piece, an inner air bag, an air supply system and a controller; the inner wall of the outer frame is annular, the outer air bag is arranged on the inner side of the outer frame, the outer air bag is an annular air bag, the test piece is arranged on the inner side of the outer air bag, and the inner air bag is arranged on the inner side of the test piece; the air supply system is communicated with the outer air bag and the inner air bag and is used for supplying air to the outer air bag and the inner air bag; the air supply system is electrically connected with the controller.
2. The test loading device for tunnel load according to claim 1, wherein the inner balloon is an annular balloon, and a center support is provided inside the inner balloon.
3. The test loading device for tunnel loading according to claim 2, wherein the center support is a solid steel column or a cement column or a thick-walled steel tube.
4. The test loading device for tunnel loading according to claim 1, wherein the outer airbag and the inner airbag each comprise a plurality of sub-airbags, each of which is provided with an exhaust port, an air inlet port, a pressure relief port and a pressure sensor; the air inlet is connected with the air supply system, and the pressure sensor is electrically connected with the controller.
5. The test loading device for tunnel load according to claim 4, wherein the exhaust port is provided with an electrically controlled exhaust valve, and the electrically controlled exhaust valve is electrically connected with the controller.
6. The test loading device for tunnel loading according to claim 4, wherein the pressure relief port is provided with a relief valve.
7. The test loading device for tunnel load according to claim 1, wherein the air supply system comprises an air compressor and a pressure regulating valve, an air outlet of the air compressor is communicated with an air inlet end of the pressure regulating valve, and an air outlet end of the pressure regulating valve is communicated with the outer air bag and the inner air bag.
8. The test loading device for tunnel load according to claim 7, wherein the air supply system comprises a plurality of pressure regulating valves, the outer air bag and the inner air bag each comprise a plurality of sub-air bags, and an air outlet end of each pressure regulating valve is respectively communicated with one sub-air bag.
9. The test loading device for tunnel loading according to claim 1, wherein the outer frame comprises a plurality of arc plates, and adjacent arc plates are connected through fastening bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310762224.5A CN116818497A (en) | 2023-06-27 | 2023-06-27 | Test loading device for tunnel load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310762224.5A CN116818497A (en) | 2023-06-27 | 2023-06-27 | Test loading device for tunnel load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116818497A true CN116818497A (en) | 2023-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310762224.5A Pending CN116818497A (en) | 2023-06-27 | 2023-06-27 | Test loading device for tunnel load |
Country Status (1)
| Country | Link |
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| CN (1) | CN116818497A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199686A (en) * | 2021-11-05 | 2022-03-18 | 武汉二航路桥特种工程有限责任公司 | Model test device and method for disease evolution law of tunnel lining of operation highway |
-
2023
- 2023-06-27 CN CN202310762224.5A patent/CN116818497A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199686A (en) * | 2021-11-05 | 2022-03-18 | 武汉二航路桥特种工程有限责任公司 | Model test device and method for disease evolution law of tunnel lining of operation highway |
| CN114199686B (en) * | 2021-11-05 | 2024-05-14 | 中交特种工程有限公司 | Model test device and method for operating highway tunnel lining disease evolution law |
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