Dynamic response test device and test method for simulating tunnel subjected to bottom-in lateral coupling
A technology of dynamic response and testing equipment, which is applied in the direction of measuring equipment, vibration testing, and the application of repeated force/pulsation force to test the strength of materials, etc., which can solve the problems of complex seismic dynamics, etc., and achieve simple testing methods, easy operation, and convenient recycling Effect
Active Publication Date: 2018-11-30
中国地质调查局成都地质调查中心 +1
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[0005] Earthquake dynamics are very complex. Numerical methods are often used for simulation in current studies. At the same time, large-scale model tests such as shaking table tests and dynamic centrifugal model tests are often used to simulate earthquake effects. However, there are few simple earthquake dynamic simulation test devices that can reproduce Response of tunnel surrounding rock under different intensity levels and vertical two-way seismic load coupling dynamic action
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[0063] Such as figure 1 , figure 2 , image 3 As shown, a kind of simulated tunnel of the present invention is installed to suffer from the dynamic response test device of bottom entry type lateral coupling, such as figure 1 As shown, the soil sample of the simulated tunnel surrounding rock 13 is installed in the test box 11, the tunnel model 12 is placed in the soil sample, and the axis of the tunnel model is guaranteed to coincide with the axis of the test box 11; a plexiglass observation window is installed on the front wall of the test box 11 , in order to observe the deformation of the tunnel model 12 in the test chamber 11, the surrounding rock parameters of the tunnel surrounding rock 13 are shown in Table 2.
[0064] After the device is installed, adjust the liftable platform 27 of the horizontal slide rail mechanism 2 to h 1The position that diameter is 6cm, the bead that quality is 887.81g is released on liftable platform 27. Make the ball hit the right wall of ...
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The invention discloses a dynamic response test device for simulating a tunnel subjected to a bottom-in lateral coupling. The dynamic response test device for simulating the tunnel subjected to the bottom-in lateral coupling comprises a box and a slide rail mechanism; the box comprises a counter-force frame, a test box, a spring, a chute and a bracket; the slide rail mechanism comprises a horizontal slide rail mechanism and a vertical slide rail mechanism; and the horizontal slide rail mechanism and the vertical slide rail mechanism separately include a chute and a bracket. According to the invention, a ball falling from the chute converts potential energy into kinetic energy, and periodically impacts the test box; and the seismic dynamic response test of tunnel surrounding rock under thecoupling of horizontal and vertical ground motions in the seismic zone is simulated through the height at which the ball begins to fall and the different time intervals at which the ball is released;therefore, the seismic wave dynamic response process and response mode of the surrounding rock of the tunnel in the seismic zone are reproduced, which provides accurate and reliable suggestions for engineering structure design and geological disaster prediction, so as to perform earthquake fortification on project construction.
Description
technical field [0001] The invention belongs to the technical field of geotechnical engineering, in particular to a dynamic response test device and a test method for simulating a tunnel subjected to bottom-entry lateral coupling. Background technique [0002] An earthquake is a natural phenomenon in which seismic waves are generated during the vibration caused by the rapid release of energy from the earth's crust. Seismic waves are divided into three types according to their propagation modes: longitudinal waves, shear waves, and surface waves. The longitudinal wave is a propulsive wave, and its propagation speed in the crust is 5.5-7 km / s. It reaches the epicenter first, also known as P wave, which causes the ground to vibrate up and down and is relatively weak in destructiveness. The shear wave is a shear wave, and its propagation speed in the crust is 3.2-4.0 km / s. The second one reaches the epicenter, also known as the S wave, which causes the ground to vibrate back an...
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IPC IPC(8): G01M7/02G01N33/24G01N3/34
Inventor 周洪福谭成轩刘彬韦玉婷符文熹叶飞
Owner 中国地质调查局成都地质调查中心