富水软岩隧道跨越断层段塌方机制分析及处治措施

doi:10.13722/j.cnki.jrme.2014.1632

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Abstract With respect to the collapse of Youfangping tunnel crossing fault at Changsha to Kunming Section in Shanghai to Kunming High-speed railway of China，the macroscopical history of the tunnel deformation was summarized，and the influencing factors of the collapse in water-rich soft rock tunnel crossing fault and the surrounding rock failure mode were analyzed. The treatment measures were proposed. The results showed that the synergistic effect of geological structure and groundwater had the most significant influence on the tunnel collapse，and to some extent，the atmospheric precipitation promoted the tunnel collapse. The impact of construction methods and supporting measures on the tunnel collapse reflected the insufficiency of knowledge. It was a combination of multiple factors that contributed to the tunnel collapse. The surrounding rock failure mode of water-rich soft rock tunnel crossing fault was concluded as the synergistic failure mode of flexural deformation and bedding slippage. Based on the analysis of tunnel collapse mechanism，the comprehensive treatment measures inside and outside tunnel were proposed to prevent the occurrence of collapse effectively.

Key words： tunnelling engineering tunnel in water-rich soft rock fault collapse failure modes

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2014.1632 OR http://www.rockmech.org/EN/Y2016/V35/I2/369

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