China Railway 14th Construction Bureau Group Co.

Jinan, China

China Railway 14th Construction Bureau Group Co.

Jinan, China

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Zuo Q.,China Three Gorges University | Wu L.,Hubei University of Education | Lin C.,China Railway 14th Construction Bureau Group Co. | Xu C.,Hubei University of Education | And 3 more authors.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2016

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. © 2016, Science Press. All right reserved.

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