Accelerated corrosion and deterioration testing device for tunnel lining structure in bearing state

An accelerated corrosion test, tunnel technology, applied in the direction of measuring devices, weather resistance/light resistance/corrosion resistance, using a stable bending force to test the strength of materials, etc., can solve the problem that the tunnel lining does not match the real environment and cannot reflect the evolution of performance decline And other issues

Active Publication Date: 2016-05-04
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This test scenario of rusting first and then bearing the load does not match the real environment of the tunnel lining structure under the combined action of load and erosion, and cannot reflect the evolution of performance degradation under the combined action of the water and soil load environment and erosion degradation environment around the tunnel lining structure. law
The reliability of the test results as the basis for tunnel design and maintenance tests needs to be improved

Method used

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  • Accelerated corrosion and deterioration testing device for tunnel lining structure in bearing state
  • Accelerated corrosion and deterioration testing device for tunnel lining structure in bearing state
  • Accelerated corrosion and deterioration testing device for tunnel lining structure in bearing state

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Figure 1-2 It is shown that a specific embodiment of the present invention is an accelerated corrosion test device for tunnel lining structures under load, which is characterized in that:

[0032] The front and rear sides of the lower part of the tunnel lining member 10 are provided with high-strength force-transmitting threaded tie rods 3, which pass through the left loading beam 2, right loading beam 1 and self-reflexive force beam 5 in turn, and the two ends of the threaded tie rods 3 Anchor bolts 6 are connected, and the left loading beam 2 and the right loading beam 1 are respectively in contact with the left end and the right end of the lower part of the tunnel lining member 10 through the force transmission liner 4; the self-reflexive force beam 5 is located on the right side of the right loading beam 1, and The left side of the self-reflexive force beam 5 is fixed with a horizontal hydraulic jack 7, and the left end of the hydraulic jack 7 is connected to the r...

Embodiment 2

[0038] Figure 3-4 It is shown that the second specific embodiment of the present invention is an accelerated corrosion test device for tunnel lining structures under load, which is characterized in that:

[0039]2. An accelerated corrosion test device for tunnel lining structures under load, characterized in that:

[0040] The front and rear sides of the lower part of the tunnel lining member 10 are provided with high-strength force-transmitting threaded tie rods 3, which pass through the left loading beam 2, right loading beam 1 and self-reflexive force beam 5 in turn, and the two ends of the threaded tie rods 3 Anchor bolts 6 are connected, and the left loading beam 2 and the right loading beam 1 are respectively in contact with the left end and the right end of the lower part of the tunnel lining member 10 through the force transmission liner 4; the self-reflexive force beam 5 is located on the right side of the right loading beam 1, and The left side of the self-reflexiv...

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PUM

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Abstract

The invention relates to an accelerated corrosion and deterioration testing device for a tunnel lining structure in the bearing state. The accelerated corrosion and deterioration testing device is a loading device composed of thread brace rods, a left loading crossbeam, a right loading crossbeam, a self-reaction force beam and a hydraulic jack; the loading device is used for controllably loading a tunnel lining structural member in a moment and axial force introduction manner and truly simulating the actual stress state of a tunnel lining structure during the operation period. Meanwhile, a steady flow direct-current power supply, corrosive liquid in a top surface corrosion area or an omnidirectional corrosion area, a stainless steel mesh in the corrosive liquid and a steel bar of the tunnel lining structural member form an electrochemical accelerated corrosion system; the electrochemical accelerated corrosion system is used for the accelerated corrosion and deterioration of the tunnel lining structural member. A strain gauge, a displacement meter, a pressure sensor and the like are used for measuring strain, deformation displacement and other data of the tunnel lining structural member in real time, thereby realizing the accelerated corrosion and deterioration test of the tunnel lining structure in the bearing state. The test environment of the accelerated corrosion and deterioration testing device provided by the invention is an environment under the combined action of load and erosion, is closer to a real underground environment of the tunnel lining structure and can more accurately reflect a real performance degradation evolution law of the tunnel lining structure, thereby providing a more reliable test basis for design and maintenance of tunnel engineering.

Description

technical field [0001] The invention relates to a test device for accelerated corrosion deterioration of tunnel lining structures under loading conditions. Background technique [0002] With the vigorous development of my country's urban rail transit and cross-river and sea-crossing channel projects at the present stage, traffic tunnel projects have gradually become the main scheme of traffic engineering due to their advantages in traffic security performance and relatively safe structure. [0003] Compared with the ground structure, due to the complexity of the underground water and soil environment, under the joint action of water and soil loads and the surrounding erosion environment, the mechanical properties of the lining structure of the tunnel lining will deteriorate and decline after a period of service: on the one hand, erosion Environmentally specific Cl - , Mg 2+ , SO 4 2- Such corrosive ions will slowly invade the tunnel along with groundwater, seawater, etc....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01N17/02G01N3/56G01N3/20
CPCG01N3/20G01N3/567G01N17/00G01N17/02G01N2203/0003G01N2203/0023G01N2203/0048G01N2203/024G01N2203/0252G01N2203/0264G01N2203/0676G01N2203/0682
Inventor 何川封坤刘四进安哲立
Owner SOUTHWEST JIAOTONG UNIV
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