Tunnel deformation test device

Abstract

The application provides a tunnel deformation testing device including a bracket, an outer pipe assembly, a support rod, a collar, and a test rod assembly. One end of the test rod assembly is fixed on the outer wall of the collar, and the other end is fixed or supported on the tunnel wall; The test rod assembly includes a telescopic ruler. The telescopic ruler includes a main pipe, an auxiliary pipe and a return spring. The auxiliary pipe is inserted into the main pipe through the plug-in end of the main pipe and can be retracted into the main pipe. It is used to drive the auxiliary pipe to reset, and the outer pipe assembly wall of the auxiliary pipe is provided with an axial length scale line, and the length scale line is used to indicate the real-time length of the telescopic ruler. The displacement test device of the present application is simple to assemble, easy to operate, easy to fix the reference point, light in weight and easy to move, unlimited in monitoring points, comprehensive in monitoring range, high in monitoring accuracy, low in cost and reusable, and can be applied to tunnels under different conditions. Research.

Description

technical field [0001] The present application relates to the technical field of underground engineering, in particular to a tunnel deformation testing device. Background technique [0002] In recent years, the development of hydropower stations, high-speed railways, expressways, and deep mineral resources has been in a state of large-scale development, especially in the field of underground engineering construction. Engineering problems are becoming more and more complex, and it is difficult to effectively guide on-site construction by using theoretical calculations and numerical simulations. At this time, the use of model tests is an effective means to analyze the stability of underground engineering. [0003] At present, the main monitoring items of underground engineering model tests are stress and displacement. There are many stress monitoring methods, which are relatively accurate, but there are few methods for displacement monitoring. The existing methods: multi-poin...

AI Technical Summary

Problems solved by technology

[0003] At present, the main monitoring items of underground engineering model tests are stress and displacement. There are many stress monitoring methods, which are relatively accurate, but there are few methods for displacement monitoring. The existing methods: multi-point displacement meter, complex operation, high cost, and cannot be reused

Photogrammetry has high requirements for reference points and is prone to errors

Other niche test methods also have problems such as easy deviation of benchmark points and complicated operation

In addition, the common problems of known displacement detection methods are: 1. The monitoring point is relatively fixed and can only be fixed on a certain section. The monitoring position is limited and it is difficult to adjust flexibly

2. When exploring the impact of post-excavation on the original monitoring point, when the device returns to monitoring, the consistency with the previous monitoring position cannot be ensured

Images