Assessment of Large Deformation Risk in Soft Rock Tunnels Based on Game Theory - Cloud Model
(1 School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu 610500; 2 School of Transportation and Logistics, Southwest Jiaotong University, Chengdu 610031)
Abstract：
It is easy for soft rock tunnels to have obvious large deformation characteristics under the combined ac? tion of geology, hydrology, engineering and other factors. At present, the studies have begun to take shape in terms of the mechanism of large deformation and the optimization of support structures in soft rock tunnels, while the studies on risk assessment and control of large deformation disasters are still in its infancy. Regarding the risk assessment of large deformation in soft rock tunnels, there is no systematic risk assessment index system on one hand and the risk assessment indices are random and fuzzy on the other hand. Based on comprehensive analysis of influence factors of large deformation risks in soft rock tunnels, 15 evaluation indices and corresponding classification standards are proposed in this paper, so that the large deformation risks in soft rock tunnels are divided into four levels. Then, in combination with the standardization process and G1-CRITIC method, the subjective and objective weights are obtained by ideological optimization based on of the game theory, and a new cloud model-based comprehensive risk assessment method is put forward. Finally, the proposed multi-factor comprehensive risk assessment method is applied to assessment of the large deformation risks in Daliangshan No. 1 tunnel on Leshan-Xichang expressway, of which the assessment results are basically consistent with the field construction situation, providing a new idea for quantitative evaluation of surrounding rock stability in soft rock tunnels.
HE Leping1 XU Yingdong1 HU Qijun1 CAI Qijie2
.Assessment of Large Deformation Risk in Soft Rock Tunnels Based on Game Theory - Cloud Model[J] MODERN TUNNELLING TECHNOLOGY, 2021,V58(6): 85-94
2021, Vol. 58 