Open AccessResearch on Influence Zoning of New Tunnels Crossing Existing Urban Roads by Orthogonal Design Considering Horizontal and Longitudinal Effects
Author(s) -
Mingjie Tian,
Jiangbo Zhang,
Shouwei Zhao,
Yuqiong Li,
Zhiheng Mou,
Huijian Zhang,
Wenge Qiu
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/741/1/012023
Subject(s) - zoning , transverse plane , instability , superposition principle , structural engineering , range (aeronautics) , geotechnical engineering , transport engineering , geology , civil engineering , engineering , mechanics , mathematics , mathematical analysis , physics , aerospace engineering
The influence of this proximity system is essentially within the stress superposition region, the stability of the new tunnel underneath the existing urban road is analyzed by strength reduction method, and the ultimate shear strain is selected as the criterion of instability of surrounding rock. By comparing the single tunnel with the adjacent system of the tunnel to the existing urban road, at a safety factor difference of 0, as a partition threshold of the influence region, the mechanical calculation models of different tunnels near the existing urban roads are established under 192 working conditions. Through multifactor analysis of the calculation results, at the same time, considering that the influence of new tunnel excavation on existing urban roads is mainly longitudinal effect, and the influence of existing urban roads on new tunnels is mainly transverse effect, the influence range diagram of longitudinal and transverse effect is established, which provides reference for similar projects in the future.