E3S Web Conf.
Volume 198, 20202020 10th Chinese Geosynthetics Conference & International Symposium on Civil Engineering and Geosynthetics (ISCEG 2020)
|Number of page(s)||4|
|Section||Structural Engineering Monitoring, Control, Repair and Reinforcement|
|Published online||26 October 2020|
Study on early-warning System of Karst Tunnel Collapse
1 Research Institute of Highway Ministry of Transport, Beijing 100088, China
2 First Engineering Co.,Ltd. China Railway 16th Bureau Group Co.,Ltd., Beijing 101300, China )
During the construction of karst Tunnel, tunnel collapse often occurs. The establishment of early-warning system of tunnel collapse can effectively ensure the construction safety, but the research is insufficient. Based on the combination of theoretical analysis and engineering practice, this paper puts forward to early-warning system for karst tunnel collapse. (1) The evaluation index system of karst tunnel collapse is composed of anchor axial force, displacement, anchor pull-out force and steel arch stress. (2) The relationship between evaluation index and warning level is determined, and the early-warning system of tunnel collapse is established. (3) The model applied to Chong’anjiang tunnel collapse warning, and achieved good results.
© The Authors, published by EDP Sciences 2020
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