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Abstract Based on an engineering case，the mechanism of the pre-support system applied in treatment for the collapse of shallow-buried tunnel is discussed. Moreover，the internal force of the second lining is analyzed by means of FEM and the procedure to treat the collapse of shallow-buried tunnel is given. Some conclusions can be drawn based on the treatment effectiveness：(1) shed-pipe grouting technology is an effective assistant construction method，and the mechanical effect is significant；(2) the deformation of the tunnel bedding wall rock often has some abruptness；and (3) the second lining should be constructed in time so as to form the closed-end supporting system earlier，which can accelerate the stabilization process of the deformation of surrounding rock and prevent the excessive deformation of surrounding rock and tunnel collapse.
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Received: 31 May 2006
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MAO Yuting1, 2, HE Manchao1, 2, LIU Fangzhou3, BAI Xing4, YANG Xiaojie1, 2, TAO Zhigang1, 2*. Development and application of a large-scale physical model system for tunnel creep testing[J]. , 2026, 45(6): 1627-1638. |
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