In order to study the deformation destructive pattern and influence rule of box tunnel lining structure cross the ground fissure with 30 degree, based on the background of Xi’an metro engineering and the geological environment of Xi’an ground fissure, the similar constant of box tunnel lining structure modelling experiment was designed according to the similar theory, furthermore, the parameters of model concrete, model reinforcement bar and model structure country soil were designed. Strain measurement of structure reinforcement bar and concrete, measurements of contact soil pressure and peripheral soil, convergence displacement of lining and the soil displacement on the top of model are proposed. The automatic monitor of 672 mearing points is implemented by the series of static strain tester with 60 channels and the combination of changeover switch with 10 bits. With the assist of foundation settlement test plate of Chang’an University, the hanging layer of ground fissure relative to lying layer slowly falling is realized by the slowly falling of latching jack. The activity speed and faulted quantity of ground fissure is implemented by the operation speed and distance of jack controlled by the controller.With the test design, the test challenge can be meeted, and the test target can be realized.
