Abstract：Research purposes: The purpose was to find out the causes for the collapse of Miandian Tunnel 3# to provide the scientific decision's basis for working out treatment scheme and for reference to similar construction.
Research methods: The analysis and research were made on engineering geology, design, construction and the result of comprehensively physical exploration after collapse. The analysis of simulation computing and research were made on the behavior of engineering mechanics for treating collapse by drafted scheme. The situations of collapse treatment and optimization were presented.
Research results: The main reasons for tunnel collapse were found out through analysis, namely due to complicated engineering geology and no laying secondary lining. It was demonstrated that the scheme of collapse treatment was reliable and treatment measure was complete with high safe level. It was shown the treatment of collapse was successful.
Research conclusions: It was necessary to strengthen geological exploration and prediction, modify the relevant construction rules in time, and solve the problems existed in construction in time and establish scientific decision's system in order to prevent the collapse happening.
刘世杰. 面店三号隧道坍方原因分析及处理[J]. 铁道工程学报, 2006, 23(3): 44-50.
LIU Shi-jie. Analysis of Causes for Collapse of Miandian Tunnel 3# and Its Treatment. 铁道工程学报, 2006, 23(3): 44-50.
2006, Vol. 23 
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