Test device and application method for supporting force of fluid-filled lining structure in simulated tunnel surrounding rock subsidence process

Abstract

The invention discloses a test device and a method for testing the supporting force of a fluid-filled lining structure in the process of simulating the subsidence of the surrounding rock of a tunnel. Different grades of loads are applied by jacks to simulate the deformation of the surrounding rock of the tunnel acting on the supporting structure of the fluid-filled lining. Different loads; cyclic loading can also be carried out to simulate different pile sinking processes, and the pressure sensor can be used to monitor the magnitude of the force. At the same time, the shape of the magnetic powder can be observed through the shape of the pigment or a layer of magnetic powder sprinkled on the surface of the tempered glass. According to the law of distribution, the stress and stress concentration of the internal filler can be judged; after the completion, the filler is sucked out by suction equipment, and the large load is removed to achieve the effect of load reduction and stress equalization. Different phenomena produce different phenomena, the structure is simple, the cost is low, the operation is convenient, and it has extensive engineering practical significance and application prospects.

Description

technical field [0001] The invention belongs to the field of engineering tunnel support, and in particular relates to a test device for testing the support force of a fluid-filled lining structure in the process of simulating the subsidence of the surrounding rock of the tunnel and a method for using it. Background technique [0002] None of the tunnel force simulation devices seen so far can truly simulate the force on the tunnel, and the research on tunnels has certain limitations, mainly because the existing simulation devices are too large in size, extremely inconvenient to operate, and unable to accurately perform Stop unloading and the force on it cannot be well recorded, and some devices cannot simulate the force on the tunnel very well, making the analysis of the force on it deviate from reality; at the same time, most of the damage to the tunnel is due to the surrounding It is caused by the subsidence of the surrounding rock, that is, the local stress concentration ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a test device and method for testing the supporting force of fluid-filled lining structures in the process of simulating the subsidence of surrounding rocks in tunnels. The stress characteristics and related laws of the subsidence can truly simulate the stress of the local subsidence in different areas of the arched tunnel fluid-filled lining support structure, and the various mechanical parameters can be monitored and measured in real time. The stress concentration and transmission conditions of the tunnel are clearly visible, real-time feedback on the stress of the tunnel, and at the same time, the effects of homogenization and load reduction can be observed through the self-designed transparent cone and the change of the laid paint layer. The data calculates the amount of filler to be removed under certain conditions, so as to predict the unloading situation in the actual project. The device used is simple in structure, low in cost, and easy to operate, and can be applied to the research of tunnels under various conditions

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