Open AccessStudy on the Evaluation of Surrounding Rock Stability and the Criterion of Limit Displacement of Fractured Stratum Tunnel
Author(s) -
Shuang Chen,
Hongyan Guo,
Jun-Wei Su,
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 - 10.1088/1755-1315/643/1/012148
Subject(s) - arch , geology , geotechnical engineering , displacement (psychology) , safety factor , structural engineering , engineering , psychology , psychotherapist
Displacement of fracture formation for highway tunnel surrounding rock stability and limit the problem of value, of deep buried tunnel by FLAC3D and the plane model is established, through strength subtraction, get tunnel vault subsidence and peripheral convergence value, secondly, based on the presence of fault cases surrounding rock ultimate shear strain analysis, it is concluded that with the loss of the reduction factor, tunnel inverted arch and arch foot site first achieve ultimate strain value and the limits of tunnel surrounding rock integrity buckling safety factor is 1.40, the fracture formation of tunnel surrounding rock stability safety factor than under the condition of no fault, lower limit displacement value than under the condition of no fault.