Experimental device and experimental method for simulating frost heaving of accumulated water in tunnel lining

Abstract

The invention belongs to the technical field of frost heaving experimental equipment, and particularly relates to an experimental device and an experimental method for simulating frost heaving of accumulated water in a tunnel lining. The experimental device comprises a simulation lining and simulation surrounding rock which are integrally located in a frame, a groove body for containing accumulated water is formed in the simulation lining, the simulation surrounding rock seals the groove body, and a distance measurer is arranged between the simulation surrounding rock and the simulation liningand used for reflecting the swelling amount of accumulated water frost heaving in the groove body. A pressure sensor is arranged at the bottom of the tank body and used for feeding back expansion force of accumulated water frost heaving in the tank body. The distance measurer and the pressure sensor are electrically connected with the data acquisition equipment. The experimental method using theexperimental device can well simulate the tunnel lining accumulated water frost heaving process, real-time change information is obtained, data processing is carried out in combination with processingequipment, and the formed test result has great reference value for engineering quality.

Description

technical field [0001] The technical field of frost heaving experiment equipment of the present invention, in particular, relates to an experimental device and an experimental method for simulating frost heaving of accumulated water inside a tunnel lining. Background technique [0002] After the water in the back cavity of the tunnel lining in cold regions freezes, due to the increase in the volume of the water body, it will expand and deform to a certain extent. Due to the constraints of the surrounding rock of the tunnel, frost heaving force will be generated, causing deformation or even cracking of the tunnel lining. At present, diseases caused by natural conditions such as cold generally exist in tunnels in cold regions. [0003] The frost heave of the rock itself is negligible, so in tunnels in cold regions, the frost heave pressure of the lining is mainly caused by the frost heave of water accumulated behind the lining. In order to understand the mechanism of tunnel f...

AI Technical Summary

Problems solved by technology

The problems of the simulation analysis method are mainly due to the lack of measured data, the pertinence is not strong, and the guiding value for engineering design is not high; the problems of the engineering actual measurement method are mainly the high cost of work and the lag of experimental results, which can only represent a single result of engineering design , there is no possibility of program comparison test; and the existing frost heave test equipment has a complex structure, high cost of use, difficult adjustment of experimental parameters, data results out of touch with actual working conditions, and low engineering reference value

Images