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| The Application and Effect of Comprehensive investigations in the Taihang Mountain Super Long Tunnel |
| XU Zai-liang , ZHAO Jian-feng, WANG Zi-wu,XU Yong-ming |
| The Third Railway Survey and Design Institute Group Corporation，Tianjin 300251，China |
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Abstract Research purposes: The topographic and geologic conditions of the Taihang Mountain tunnel in the passenger special line from Shijiazhuang to Taiyuan are very complicated. In order to make the thorough investigation of the engineering geological and hydrogeological conditions of the tunnel, comprehensive investigations were applied.
Research methods: Based an the complicated geological conditions and the design requests of the tunnel, all investigation methods involving application principles, job contents, quantity of work and effect，introduced detailedly.
Research results: The results show that karst and groundwater do not developed, and severe geologic hazard-water gushing, projecting mud soil, rock burst, harmful gas etc. will not occur. Except that engineering geological conditions of 4. 5 km long gypsum 6reccia and partial fault crushed zone，relatively poor, the others are good. Now the construction of funnel goes well and prominent technical, social and economical benefits are obvious.
Research conclusions: In the survey of the long tunnels which have complicated geographical and geological conditions, the comprehensive investigation plays a key role far the entire process of geologic investigation of tunnel, with the geology investigation taken firstly, the macroscopic function of remote sensing developed, the physical exploration as well as the further validation with drilling adopted effectively.
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Received: 16 August 2007
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2007, Vol. 24 
