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| Research on the Hydrogeology Characteristics of Xiushan Tunnel |
| LI Dong |
| China Railway Eryuan Engineering Group Co. Ltd，Chengdu，Sichuan 610031，China |
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Abstract Research purposes: Xiushan Tunnel is in a complex groundwater network system, which is influenced by peculiar geological structure in Yunnan Province and unconventionality active crustal movement, karst conduit and wide fracture developed，and karst water and tectonic crack water mixed. Through the research of engineering geological and hydro-geological conditions and the gushing water characteristic in tunnel excavating, find out the hydraulic connection between the gushing water source and Qilu Lake.
Research conclusions ;(1)The section of largest gush of water in tunnel has been competitively analyzed, and water isotope test has been adopt, which present the groundwater is from the meteoric water of tunnel area. ( 2 ) The source of groundwater in the tunnel sit and Qilu Lake is evidently difference，and the hydraulic connection between the gushing water and Qilu Lake is slight.(3)The tunnel passes through Qujiang River hydrogeology unit and Qilu Lake hydrogeology unit, and the great difference of hydrogeology characteristic has been expressed in different section of tunnel construction. ( 4 ) This paper aims to summarize experience，and affords reference for investigation，design and construction of other tunnels on analogous geological conditions.
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Received: 16 November 2013
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2014, Vol. 31 
