Abstract：Research purposes: Jiaozhow Bay Marine Tunnel is the second marine tunnel in China．The marine surrounding rocks are complicated and changeable．The hydraulic contact exists between seawater and groundwater．The sea area crosses ten fault zones．The surrounding rocks are broken and the fissure water is developing in fault zones and its influence area．How to accurately survey the unfavorable geological body and how to deal with them effectively are the key points for construction of the tunnel．Therefore，for different geological body，the relative geological forecast and treatment measures should be adopted
Research conclusions: (1)According to the analysis result of geological risk，the relative technology for geological forecast in advance was adopted for ensuring the reasonableness of the survey method and the reliability of the result． (2)The perfect procedure of geological forecast in advance and its management mode were established for accurately survey the unfavorable geological body．(3)According to the survey result and the water discharge and pressure，this paper puts forward the criteria for scheme selection and the evaluation method for grouting effect to safely treat the unfavorable geological body with money saving．
2009, Vol. 26 
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