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| Analysis of Karst Development Regularities and Control Factors of Dabaoliang Tunnel in Qianjiang-Zhangjiajie-Changde Railway |
| ZHOU Xiao-guang |
| China Railway First Survey and Design Institute Group Ltd，Xi’an，Shanxi 710043，China |
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Abstract Research purposes: Karst is the most serious unfavorable geology problems about the railway project m the southern karst area, therefore the research of the engineering geological conditions become the main content of geological survey work. This article takes Dabaoliang tunnel in Qianjiang-Zhangjiajie-Changde Railway as an example，analyzes and researches the karst development regularities and control factors by the comprehensive survey methods，and provide a reference for karst region geological survey in the future.
Research conclusions: This article get the following conclusions according to the research and analysis of karst development regularities and control factors of Dabaoliang tunnel:(1)Confirming the position of four more large-scale karst conduit and fracture flow system in the area，which provide the reference for tunnel design work;(2)It should adopt the comprehensive engineering geological exploration methods，combining the interpretation of aerial photoes， ground survey，hole survey，geophysical exploration and other methods，to further reveal the karst development regularities and achieve investigation purpose;(3)This article provide the certain reference value for the future geological survey in karst area.
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Received: 01 July 2013
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2013, Vol. 30 
