Experimental method for water seepage characteristics of ruptured tunnel lining structure

Abstract

The invention belongs to the field of civil engineering and relates to an experimental method for the water seepage characteristics of a ruptured tunnel lining structure. The experimental method includes the following steps that: the size of a test piece is determined; a pouring size is determined, and a pouring mold is customized; the test piece is maintained, a core sample test piece required byan experiment is sampled through drilling; the test piece is accurately ground to an experimental size; the core sample test piece is arranged in a splitting cutter, the core sample test piece is split, and the split core sample test piece is labeled; spacers of required thickness are sandwiched between the split core sample test piece, the split core sample test piece is bonded together; a physical and mechanical experiment is carried out with professional experimental equipment; and after the experiment is completed, the test piece is split, and three dimension scanning and numerical valuesimulation are performed on the split test piece. With the experimental method of the invention adopted, the boundary effect of a concrete aggregate is weakened; the cause, shape and property of a crack under a real condition are reproduced; the relevant detection results of the water seepage amount, structure thickness, crack state and the like of the lining structure are mapped into water pressure behind the wall of the lining structure, and therefore, theoretical support can be provided for structural calculation, disease grading and structural remediation. The experimental method has greatresearch significance and a high application value.

Description

technical field [0001] The invention belongs to the field of civil engineering and relates to an experimental method for water seepage characteristics of a cracked tunnel lining structure. Background technique [0002] Tunnels are built in underground rock-soil media and are semi-concealed projects. Due to geological survey, design, construction, maintenance and other factors, tunnel structural deformation, cracking, water leakage and other diseases often occur, and the number of operating tunnel diseases is increasing year by year. Judging from the completed highway tunnels, the phenomena of lining cracking, lining water leakage, corrosion, and block falling are the most serious. [0003] The experience of many tunnel diseases shows that the damage of lining structure and water leakage are the main factors affecting the safety of tunnels. For the research on crack damage and water leakage of lining structure, the existing achievements are based on single disease conditions...

AI Technical Summary

Problems solved by technology

[0004] Through the retrieval of existing technical literature, it is found that although there are a large number of patent documents on the preparation method of cracks in concrete specimens, there are still various problems. Some equipment is too simple to simulate the cracks of cylindrical specimens; some only use computer software. The simulation has not been compared with the actual experimental model, and the accuracy needs to be tested; some devices are too complicated to operate, which is not conducive to the actual experimental operation