|
|
|
| Influence Factors of Karst Tunnel Risk and Risk Assessment |
| WU Zhi － sheng，ZHANG Jie |
| China Railway Siyuan Survey and Design Group Co． Ltd，Wuhan，Hubei 430063，China |
|
|
|
|
Abstract Research purposes: In recent years， the sudden and catastrophic geological disasters of Karst tunnel happen continuously and they not only cause the loss of state property，the construction delay and the environmental disruption，but also cause serious personal casualty． The reasons for the disasters are the risk hazard has not been fully understood and the full measures have not been taken． Based on the study on the influence factors of the mountain karst tunnel risk，this paper tends to evaluate the risk degree and grade the risk for laying the solid foundation for tunnel construction．
Research conclusions: The analysis of causes of Karst tunnel risk is made to find out the influence of the intrinsic factors，external conditions and engineering technical conditions on tunnel risk，and delete the overlapped factors．Based on the study， it is aware of that the formation lithology and geological structure that promote the development of Karst and Karst water are the intrinsic factors of the karst tunnel risk and play the leading role in the risk while the external conditions and engineering technical conditions play the auxiliary role in the risk． According to this ，the basic grading standard and method are formulated and the scoring formula is used for grading the tunnel risk．As long as the intrinsic factors exist，there is a possibility that the karst tunnel has high risk． The high risk and extremely high risk Karst tunnel should be avoided as much as possible． If there is no way to avoid，the traditional idea should be changed and the risk should be under control．
|
|
Received: 16 August 2011
|
|
|
|
|
|
［1］ 吴治生，等． 岩溶与铁道工程和环境地质的研究［R］． 武汉: 铁道第四勘察设计院， 2004．
Wu Zhisheng，etc． Researching of Railway Engineering and Environmental Geology in Karst Zone ［R］ ．WuHan: The Fourth Survey and Design Institute of China Railway， 2004．
［2］ 吴治生． 岩溶塌陷地表稳定性分析及工程地质分区［J］．铁道工程学报， 2006( 4) : 6 －9．
Wu Zhisheng． Analysis of Stability of Subsidence Surface in Karst Area and Zoning for Engineering Geology［J］． Journal of Railway Engineering Society，2006( 4) : 6 －9．
［3］ 吴治生，付伯森． 南岭隧道岩溶管道涌泥及治理经验［M］． 成都: 成都科技大学出版社， 1988．
Wu Zhisheng， Fu Bosen． Gushing Mud of Karst Conduit in Nanling Tunnel and Treating Experiences［M］． Chengdu: Chengdu University of Science and Technology press， 1988．
［4］ 吴治生，付伯森． 南岭隧道注浆概况及经验教训［J］． 铁道工程学报， 1989( 2) : 168 －176．
Wu Zhisheng， Fu Bosen． General Situation and Experience and Lessons of Grouting in Nanling Tunnel ［J］． Journal of Railway Engineering Society， 1989( 2) :168 －176．
［5］ 吴治生． 南岭隧道地质灾害及其综合整治［J］． 中国地质灾害与防治学报， 1993( 2) : 72 －78．
Wu Zhisheng． Geological Hazards in Nanling Tunnel and It’s Comprehensive Renovation［J］． The Chinese Journal of Geological Hazard and Control ，1993 ( 2) :72 －78．
［6］ TB 10027—2001，铁路工程不良地质勘察规程［S］．
TB 10027—2001， Code for Unfavorable Geological Condition Investigation of Railway Engineering［S］．
［7］ 张之涂． 娘子关地区马家沟灰岩岩溶［C］/ /中国地质学会第二届岩溶学术会议论文选集． 北京: 科学出版社，1982．
Zhang Zhitu． Limestone Karst of Majiagou Niangziguan Zone［C］/ /Chinese Geological Society Second Annual Academic Conference of Karst． Beijing: Science Press，1982．
［8］ 曹以临，廖资生． 鲁中地区下古生界碳酸盐岩的结构及其对岩溶发育的影响［C］/ /中国地质学会第二届岩溶学术会议论文选集． 北京: 科学出版社， 1982．
Cao Yilin， Liao Zisheng． The Structure of Lower Paleozoic Carbonate rocks in Central Region of Shandong and it’s Effect of Karst Development［C］/ /Chinese Geological Society Second Annual Academic Conference of Karst． Beijing: Science Press， 1982．
|
|
|
|
2011, Vol. 28 
