E3S Web Conf.
Volume 145, 20202019 International Academic Exchange Conference on Science and Technology Innovation (IAECST 2019)
|Number of page(s)||6|
|Section||International Conference on New Energy Science and Environmental Engineering|
|Published online||06 February 2020|
Sensitivity Analysis Of Influencing Factors On Tunnel Stability In Bad Geological Slope Sections
1 Jiangxi Jiatexin Engineering Technology., co., LTD., Nanchang 330200, China
2 Communication Design & Research Institute co. LTD Of Jiangxi Prov., Nanchang 330200, China
3 East China Jiaotong University
4 Jiangxi provincial academy of transportation sciences
Based on a tunnel through slope of Yongji highway project, relying on ABAQUS geotechnical numerical analysis software, using the appearance of plastic penetration area for instablilty criterion, choosing 11 typical influential factors as independent variables to tunnel stability, the orthogonal test array L50(511) is used to analyze sensitivity of influence factors under evaluating indexes of safety factor to the tunnel stability and the maximum principal tensile on the inner surface of surrounding rock. Research results show that: there are some certain differences between calculation results of safety factor and maximum principal tensile, but overall presentation represents favorable consistency, and the sensitivity of influence factors to the stability of tunnel through unfavorable geological slope can be preferably annlyzed by orthogonal test. The influence of the cohesion of rock c, the horizontal distance d between tunnel centerline and slope toe, the inclination angle of slope α are significant. Comprehensive consideration of safety factor and maximum principal tensile of tunnel circumference is more perfect than one-sided safety factor when performing the analysis of tunnel stability. The research results of this paper can provide reference to design, construction of similar tunnels.
© The Authors, published by EDP Sciences 2020
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