Visualization system for simulating deep roadway deformation under action of underground water freezing and thawing cycle

Abstract

The invention belongs to the field of geotechnical engineering tests and especially relates to a visualization system for simulating deep roadway deformation under action of underground water freezingand thawing cycle. A problem that visual detection of deep roadway deformation under the action of water system freezing and thawing cycle cannot be achieved in a simulation test is solved. The visualization system comprises a high-energy accelerator CT detection system, a test cabin system, a temperature control system, a water system simulation system and a PET detection system. The high-energyaccelerator CT detection system is used for scanning and detecting a three-dimensional shape of a crack in a test piece; the temperature control system is used for simulating a freeze-thaw cycle environment; the water system simulation system is used for conveying a liquid to simulate a water system channel; and the PET detection system is used for detecting migration dynamic of seepage in the cracks of the test piece under the action of freezing and thawing cycle. Through visual detection of the roadway deformation process, accurate detection of crack development and expansion in tunnel surrounding rock under the action of freezing and thawing cycle is achieved so that a tunnel surrounding rock deformation state corresponding to a set water system position and temperature parameters is obtained, and reliable parameters are provided for actual construction operation.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering tests, and in particular relates to a visualization system for simulating the deformation of deep tunnels under the action of freeze-thaw cycles of groundwater. Background technique [0002] During and after the construction of a large number of existing tunnels, they are faced with the prediction and maintenance of the stress deformation caused by the development of underground water system, high ground stress, and low temperature environment; the special environment on the site and other factors cannot be quantitatively analyzed in different freezing and thawing environments. , Water systems in different locations evaluate the deformation of rock mass and the development and expansion of fractures. Model test technology is an important means to study large-scale tunnel engineering problems in rock and soil. It can qualitatively or quantitatively study the stress and deformation characteri...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the visual detection of deep roadway deformation under the action of groundwater freeze-thaw cycle cannot be realized in the simulation test, the present invention provides a visualization method for simulating the deformation of deep roadway under the action of groundwater freeze-thaw cycle The system includes a high-energy accelerator CT detection system, a test chamber system, a temperature control system, a water system simulation system and a PET detection system, and the high-energy accelerator CT detection system is used to scan and detect the three-dimensional shape of cracks in the test piece;

Images