Destructive testing apparatus and method for simulating tunnel going through oblique displaced active fault

Abstract

The invention discloses a destructive testing apparatus and method for simulating tunnel going through oblique displaced active fault. The apparatus is mainly configured in that: a lidless model testing sample box is composed of a movable left half box 100 and a fixed right half box 200; the movable left half box 100 is connected to the fixed right half box 200 through a front bilateral sliding pair 309 and a rear bilateral sliding pair 310; a left bottom plate 102 of the left half box hinges an upper end of a vertically loading apparatus 307, and a lower end of the vertically loading apparatus 307 is connected to a horizontal moving platform 308 which can move forward and backward to the left side of a pedestal 400; a left front plate 103 and right front plate of the left half box cling closely and respectively to a front horizontal loading apparatus 302 and a rear horizontal loading apparatus. The apparatus can implement a tunnel structure and spatial positions of multiple dip angles and multiple crossing angles among active faults, simulates stress states and destructive methods of the tunnel structure in a more accurate manner so as to provide more reliable testing data for the design and construction of going through fault tunnel structure.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, and relates to a destructive test device and a test method for simulating a tunnel crossing an obliquely staggered active fault. Background technique [0002] In the 20th century, a large number of rock-soil mechanics friction-slip experiments showed that there are two basic forms of rock-soil friction-slip: steady slip (creep slip) and sudden slip (stick-slip). Stick-slip is an unstable slip that is an oscillatory displacement response to an applied load. Stick-slip dislocation of active faults is a regional geological disaster characterized by fault structures. It is the main factor causing serious damage to tunnel structures across faults, and seriously affects the stability of tunnel lining structures. When the fault plane is inclined, the rock mass above the fault plane is called the hanging wall, and the rock mass below the fault plane is called the footwall. The stick-slip dis...

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Problems solved by technology

The existing problems are: 1. It can only simulate the damage behavior of the stable sliding cracks with a very low activity rate to the tunnel, but it cannot simulate the damage behavior of the stick-slip dislocation of the unstable sliding active fault with a high dislocation rate to the tunnel ; 2. It can only be controlled according to the preset total settlement displacement, and cannot simulate the damage behavior of the fault dislocation on the tunnel under different displacement velocities; 3. It can only simulate the damage to the tunnel caused by the dislocation of the crack along the vertical axis of the shear plane. The damage behavior of the tunnel can not be simulated by faults shifted along the transverse axis of the shear plane

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