Test device for simulating tunnel seismic response under fault movements and test methods

A fault dislocation and test device technology, applied in seismology, measurement device, vibration test and other directions, can solve the problem of inability to highly match, the authenticity and accuracy of the test results are not high enough, and the tunnel effect of fault dislocation shear action cannot be considered at the same time. and other problems to achieve the effect of improving authenticity and accuracy

Inactive Publication Date: 2016-12-14
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The test device for simulating the seismic response of tunnels can be referred to as the earthquake model test device. The existing seismic model test devices cannot simultaneously consider the shear action of fault dislocation and the impact of earthquakes on the tunnel, and cannot simulate the continuous ...

Method used

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  • Test device for simulating tunnel seismic response under fault movements and test methods
  • Test device for simulating tunnel seismic response under fault movements and test methods
  • Test device for simulating tunnel seismic response under fault movements and test methods

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Experimental program
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Effect test

Embodiment 1

[0047] The test device for simulating the tunnel seismic response under fault dislocation according to the present invention is used for simulating normal faults, and its test method comprises the following steps:

[0048] (1) According to the surrounding rock parameters and similar ratios in the test plan, the test soil is reasonably proportioned, and the door 19 of the model test box 1 is opened for easy operation;

[0049] (2) Adjust the inclination angle of the guide rail 10 to make it consistent with the inclination angle of the fault fracture surface, adjust the loading rate of the hydraulic jack 15 and make it push the lifting drawer 4 upwards, and prepare space for the downward movement of the upper wall soil to reach the set value. Stop and fix the lifting drawer 4 after the displacement, and keep the lifting drawer 4 in the original vertical state by adjusting the stabilizer bar 2 during the whole process;

[0050] (3) Lay the prepared soil at the bottom of the model...

Embodiment 2

[0055] The test device for simulating the tunnel seismic response under fault dislocation according to the present invention is used for simulating a reverse fault, and its test method comprises the following steps:

[0056] (1) According to the surrounding rock parameters and similar proportions in the test plan, the test soil is reasonably proportioned and the test soil is placed in the model test box 1 and located on the side of the lifting drawer 4 away from the box door 19, and the model test is started. The door 19 of the box 1 is convenient for operation;

[0057] (2) Lay the prepared soil to the height of the bottom surface of the tunnel model at the bottom of the model test box 1, put the tunnel model in the length direction of the model test box 1, and one end of the tunnel model is close to the model test box 1 and opposite to the door 19 One end of the tunnel model, the other end of the tunnel model is close to the inner surface of the lifting drawer 4, and a detec...

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Abstract

The invention discloses a test device for simulating a tunnel seismic response under fault movements, which comprises a vibration table, a model test box, a guide rail underframe, a guide rail, a calibrated rod, a spring matrix, a spring mounting plate, a load-bearing bottom plate, an adjustment connecting rod, a fixed bearing, a mobile bearing, a lifting drawer, a jack base and a hydraulic jack. The invention further discloses two test method adopted by the test device for simulating the tunnel seismic response under the fault movements, and the two methods are respectively used for normal fault simulation and reverse fault simulation. A dynamic response of a seismic action in a condition that a fault movement force acts on a tunnel model can be realized by adopting the test device disclosed by the invention, the fault movement force is provided by the hydraulic jack, faults with any inclination angle can be simulated, and the spring matrix can ensure continuous dynamic movements of a hanging side soil body when the vibration table is in operation, so that stress of the tunnel model is enabled to be more consistent with actual situations, the authenticity and the precision of a test result are significantly improved, and research on anti-seismic and shock absorption design of a fault crossing tunnel is facilitated.

Description

technical field [0001] The invention relates to a tunnel anti-seismic test device, in particular to a test device and a test method for simulating the seismic response of a tunnel under fault dislocation. Background technique [0002] The 5.12 Wenchuan Earthquake in Wenchuan, China in 2008 resulted in varying degrees of damage to a number of tunnels. Among the total 57 tunnels investigated, 49 had concrete block cracks, falling, or even steel bar bending in the lining of 49 tunnels. destruction. [0003] The survey shows that when the tunnel passes through the active fault zone, the fault movement will produce a shearing effect on the tunnel structure. Under the action of the earthquake, the supporting structure of the tunnel will be subjected to a greater shearing effect, and the tunnel lining will be structurally damaged. In severe cases, it may cause Casualties and losses, and it is difficult to recover in time due to traffic interruption, and it is also impossible to ca...

Claims

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Application Information

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IPC IPC(8): G01V1/00G01M7/02G01N3/24
CPCG01M7/02G01N3/24G01N2203/0025G01V1/00
Inventor 耿萍王少锋卢志楷晏启祥何悦张景陈枰良
Owner SOUTHWEST JIAOTONG UNIV
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