柔性连接隧道在正断层黏滑错动下的变形特征

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Abstract ：Based on the project of the tunnel crossing the normal active fault whose dip angle is 60°，the length of segment is 0.5D(D is the diameter of tunnel) and flexible connection between two segments design is adopted in articulated tunnel. Through a model experiment，the deformation characteristics of tunnel with flexible joints are discussed. The experiment results show that the longitudinal strain and transverse strain of articulated tunnel change greatly in the range of 1D near the fracture plane. The tunnel failure mode is the combined rotation and slab staggering，the rotation angle is 33°and 28°，and the deformation range is 2.5D. Compared the tunnel where the anti-breaking measures are taken with the flexible tunnel，under the same experiment condition，the result indicats that the longitudinal strain of tunnel with flexible joints is smaller than the complete tunnel?s，and the deformation range of the flexible tunnel is smaller than that of the complete tunnel.

Key words： tunneling engineering normal fault stick-slip dislocation flexible joints deformation characteristics

Received: 19 June 2012

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3545

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