Water-sand inrush risk assessment method of sandy dolomite tunnel and its application in the Chenaju tunnel, southwest of China

Jia-xing Dong
Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China
Zhen-luo Shen
Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China
Li Cao
Yunnan Water Diversion Project Construction Administration Bureau, Kunming, Yunnan, China
Jian Mi
Yunnan Institute of Water & Hydropower Investigation, Design and Research, Kunming, Yunnan, China
Jian-guo Li
Yunnan Institute of Water & Hydropower Investigation, Design and Research, Kunming, Yunnan, China
Yong-chuan Zhao
Yunnan Institute of Water & Hydropower Investigation, Design and Research, Kunming, Yunnan, China
Hong-yuan Mu
Yunnan Institute of Water & Hydropower Investigation, Design and Research, Kunming, Yunnan, China
Li-peng Liu
Key Laboratory of Construction and Safety of Water Engineering of the Ministry of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing, China
Chong-rui Dai
China Railway Erju 1 Engineering Co. Ltd, Guiyang, Guizhou, China

Sandy dolomite strata are widely distributed in the diversion tunnel of the Yuxi section of the Water Diversion Project in Central Yunnan (WDPCY). The water-sand inrush is the main failure phenomenon in the construction of sandy dolomite tunnel, which has seriously and commonly threatened the safety of the Chenaju (CNJ) tunnel in the WDPCY. In this paper, we established the discriminant matrix of the water-sand inrush risk assessment by consulting the experts, including the designers and construction personnel of the CNJ tunnel. Then, the risk assessment of water-sand inrush in the CNJ tunnel is carried out based on the proposed Fuzzy-AHP method. The results show that (1) a hierarchical model...

https://www.tandfonline.com/doi/full/10.1080/19475705.2023.2196369