Open AccessStudy on The Evaluation of Surrounding Rock Stability and Limit Displacement of High-Pressure Stratum Tunnel
Author(s) -
Xiaolong Zhang,
Hongyan Guo,
Lianchao Ye,
Dengzhi Tang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/643/1/012055
Subject(s) - instability , stratum , geotechnical engineering , displacement (psychology) , limit (mathematics) , deformation (meteorology) , pressure coefficient , high pressure , geology , safety factor , stability (learning theory) , mechanics , mathematics , computer science , physics , psychology , mathematical analysis , oceanography , machine learning , psychotherapist
Aiming at the problem of the value of the stability and limit displacement of the surrounding rock of highway tunnel with high pressure, the method of numerical limit analysis is adopted, and one of the working conditions is analyzed in detail. Firstly, this paper adopts the formation structure method to calculate and establish a plane model for calculation and analysis with the help of FLAC3D software, so as to study the influence of reduction coefficient on surrounding rock deformation and its law. Secondly, by holding other variables unchanged, two different working conditions with and without high water pressure are compared and analyzed, and it is obtained that the ultimate safety factor of the integrity instability of surrounding rock of the formation tunnel with high water pressure is 1.30, and that of the integrity instability of surrounding rock of the formation tunnel without high water pressure is 1.80. Finally, the results are compared and analyzed and it is found that the stability of tunnel surrounding rocks with high pressure is lower than that without high pressure, and the limit displacement is greater than that without high pressure.