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A test device and test method for simulating the seismic response of tunnels under fault dislocation

A fault dislocation and test device technology, which is applied in seismology, measurement devices, vibration testing and other directions, can solve the problem of inability to highly match, inability to simultaneously consider the effect of fault dislocation shearing tunneling, and insufficient authenticity and accuracy of test results. problems, to achieve the effect of increased authenticity and accuracy

Inactive Publication Date: 2018-01-16
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 occurrence of faults when the tunnel is subjected to seismic loads. This makes the experimental process not highly consistent with the actual situation, and the authenticity and accuracy of the test results are not high enough, which is not conducive to the research on the anti-seismic design of tunnels crossing faults

Method used

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  • A test device and test method for simulating the seismic response of tunnels under fault dislocation
  • A test device and test method for simulating the seismic response of tunnels under fault dislocation
  • A test device and test method for simulating the seismic response of tunnels under fault dislocation

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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 the seismic response of a tunnel under fault dislocation, which comprises a shaking table, a model test box, a guide rail underframe, a guide rail, a scale bar, a spring matrix, a spring mounting plate, a load-bearing bottom plate, an adjustment connecting rod, a fixed Bearings, movable bearings, lift drawers, jack bases and hydraulic jacks. The invention also discloses two test methods adopted by the test device for simulating the tunnel seismic response under fault dislocation, which are respectively used for normal fault simulation and reverse fault simulation. The test device of the present invention can realize the dynamic response of the fault force acting on the earthquake under the tunnel model. The fault force is provided by the hydraulic jack and can simulate a fault with any inclination angle. The spring matrix can ensure that the hanging wall soil works on the shaking table. The continuous dynamic dislocation of time makes the force of the tunnel model more in line with the actual situation, and the authenticity and accuracy of the test results are significantly improved, which is beneficial to the research on the anti-seismic design of tunnels crossing faults.

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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Patent Type & Authority Patents(China)
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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