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Influence of Lining Section Type on a Tunnel Structure Under Active
Fault Movement
(1 College of Surveying and Geo-Informatics, Tongji University, Shanghai 200092;
2 Shanghai Tongyan Civil Engineering Technology Co. Ltd., Shanghai 200092;
3 Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092)
Abstract Using the finite-element method, this paper compares and studies the influence of lining section type on the stress and plastic strain of tunnels with chain-structures under active fault movement based on five three-centered circular sections of different invert radii from the Qipanshi tunnel project. The results show that: (1) the secondary lining is subjected to the combined action of tensioning, shearing, and squeezing due to fault movement; (2) high stress is mainly distributed at the arch spring with the peak stress on the hanging wall, and tensile force will be effectively absorbed by the shear crack; (3) with the tunnel section constantly tending toward a perfect circle, the maximum and minimum principal stresses and shear stress of the secondary lining decrease while the equivalent plastic stain increases.
Abstract：
Using the finite-element method, this paper compares and studies the influence of lining section type on the stress and plastic strain of tunnels with chain-structures under active fault movement based on five three-centered circular sections of different invert radii from the Qipanshi tunnel project. The results show that: (1) the secondary lining is subjected to the combined action of tensioning, shearing, and squeezing due to fault movement; (2) high stress is mainly distributed at the arch spring with the peak stress on the hanging wall, and tensile force will be effectively absorbed by the shear crack; (3) with the tunnel section constantly tending toward a perfect circle, the maximum and minimum principal stresses and shear stress of the secondary lining decrease while the equivalent plastic stain increases.
LIU Xue-Zeng-1,
GU Xue-Ying-2,
DAI Zhi-Ping-2 etc
.Influence of Lining Section Type on a Tunnel Structure Under Active
Fault Movement
[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(5): 71-77
2014, Vol. 51 