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Abstract The longitudinal deformations of the pipe-roofs in the entrance of Tujiangchong tunnel are monitored by installation of a series of strain gauges to investigate the mechanical behaviors of the pipe-roofs during the tunnel excavation；and the working mechanism of pipe-roofs in shallow tunnels is discussed. The rigid joint Winkler elastic foundation beam model is revised；and a new double-parameter elastic foundation beam model for pipe-roof in shallow tunnels is put forward. The corresponding deformation equations，stress and strain formula are deduced；and the solutions of this model are given. The proposed elastic joint double-parameter elastic foundation beam model has been used successfully in the evaluation of mechanical behaviors of the pipe-roofs in Tujiangchong tunnel. It shows that the calculation results agree well with the measured values；and the elastic joint double-parameter elastic foundation beam model is reasonable in the analysis of the mechanical behaviors of pipe-roofs in shallow tunnels.
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Received: 26 September 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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