Abstract：Research purposes: The Yichang － Wanzhou Railway is in the very complex geological condition area where was called as the " forbidden zone" of railway construction，and there was a huge geological risk in tunnel construction．The main body of Major tunnel was buried deep inside mountain． The technical means of investigation only could detect the shallow statum，and it was difficult to detect deep stratum． So the contradiction between " Unable to fully detection and requiring full detection" always existed in tunnel construction． In order to solve this contradiction，what to do was to strengthen the geological survey work by conducting geological forecast for tunnel construction based on the previous geological survey．
Research conclusions: The " classification of geological complexity in tunnel construction " was researched and developed to realize the " geological prediction design for tunnel construction" and place it into the standard management range． This method could ensure the safe construction of tunnel and push forward the geological forecast work with obtaining good result．
陈毅敏. 宜万铁路复杂岩溶隧道施工地质预报特色[J]. 铁道工程学报, 2011, 28(2): 95-102.
CHEN Yi － min. Characteristics of Geological Forecast for Construction of Complex Karst Tunnel of Yichang － Wanzhou Railway. 铁道工程学报, 2011, 28(2): 95-102.
Jiang Ying，Cao Zheming，Liu Tie． Application of High Frequency Magentotelluric Method to the Karst Exploration the Tunnel along Yi － Wan Railroad［J］． Chinse Journal of Engineering Geophysics，2006( 3) : 208 －210．
［4］ 邓谊明． 宜万线一个值得注意的岩溶地质问题———P1m 地层中的古岩溶［J］． 地质与路基，2004( 3) : 1 －4．
Deng Yiming． A Notable Karst Geological Problems －The Ancient Karst of P 1m of Yichang － Wanzhou Railway［J］． Railway Geology ＆ Subgrade，2004( 3) : 1 －4．
Xu Hongxing，Deng Yiming． Analysis of Hydrogeology Problems Related to Water Bursting in Area of DK 124 + 602 at Yesanguan Tunnel of Yichang － wanzhou Railway ［J］． Journal of Railway Engineering Society，2010( 4) : 29 － 34．
［6］ 曾宪明． 宜万铁路施工地质工作［J］． 铁道勘察，2010 ( 1) : 34 －39．
Zeng Xianming． Discussion on Engineering Geological Work at Construction Phase of Yichang － Wanzhou Railway［J］． Railway Investigation and Surveying，2001 ( 1) : 34 －39．
Deng Yiming． Main Engineering Geological Problems in option of Zhicheng － Wanzhou Railway ［J］． Social Sciences Edition Journal of China University of Geosciences，2001( 4) : 23 － 28．
2011, Vol. 28 
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