胶州湾海底隧道综合超前地质预报与注浆方案选择

Geological Forecast in Advance and Grouting Scheme Selection for Jiaozhou Bay Marine Tunnel

研究目的:胶州湾海底隧道为我国在建的第二条海底隧道,隧道围岩复杂多变,地下水与海水有水力联系,其中海域段穿越10条断层破碎带,断层破碎带及其影响带内围岩破碎、裂隙水发育,如何准确探测不良地质体及对其进行有效处理,是保证隧道安全如期建成的关键,因此,对不同地质体应采取有针对的地质预报和处理措施。研究结论:(1)根据地质风险分析结果,采取了针对性的综合超前地质预报技术,保证了探测方法的合理性和结果的可靠性;(2)为了准确探测不良地质体,建立了完善的超前探测程序和管理方式;(3)根据超前探测结果结合水量和水压大小,提出了注浆堵水方案选择标准及效果评价方法,保证了安全经济地处理不良地质体。

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.