Abstract：Plate movement is active in southwest China.Tunnels will inevitably cross active fault zones.The stick-slip effect of active fault zones will pose a great threat to safety and stability of tunnel structures.Here, firstly, a spatial large-scale plate extrusion model of 300 km ×100 km was established.Through applying the extrusion rate to the plate, generation and deformation characteristics of reverse fault stick-slip action during 200 000 years of plate movement were calculated, and then displacement at time of fault stick-slip was applied to the fine finite element model to analyze mechanical and damage behavior of tunnel structure under the action of reverse fault stick-slip.The results showed that shear stress at fault presents a state of “sudden drop and then rise” at time of stick-slip, and a pulse velocity time history is generated on hanging wall of fault; displacement characteristic curve on fault top surface can be divided into single-peak curve and double-peak curve, finally both of them maintain permanent displacement; the larger the stratum stiffness, the wider the crack width generated by tunnel lining under stick-slip and the smaller the crack expansion range; under working conditions studied and different geological conditions, the maximum crack width of tunnel lining is 19.8 cm, and the maximum crack expansion length is 55.4 m; the study results can provide a reference for studying structural failure characteristics of tunnel under action of reverse fault stick-slip.
郭翔宇，耿萍，丁梯，王琦，杨琪，何悦. 逆断层黏滑作用下隧道力学行为研究[J]. 振动与冲击, 2021, 40(17): 249-258.
GUO Xiangyu, GENG Ping, DING Ti, WANG Qi, YANG Qi, HE Yue. Mechanical behavior of tunnel under stick-slip action of reverse fault. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(17): 249-258.
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