研究结论:采用理论分析、数值模拟、现场试验、监控量测、超前地质预报等手段，对海底隧道施工风险管理、断层破碎带施工、浅埋交汇大跨及小净距洞室施工、交叉群洞施工、钻爆法快速施工等关键技术进行了深入研究。构建了施工风险管理信息系统，开发了双通道注浆器和破碎岩体( 断层破碎带) 无止浆墙快速帷幕注浆新工艺，优化了平面交汇洞室及立体交叉群洞施工方法，总结形成了钻爆法快速施工成套技术，推动了我国海域隧道施工技术进步。

Research conclusions: By making theoretic analysis，numerical simulation，in － site test and conducting the advanced geological forecast，the deep study was done on the key technologies，including the risk management of construction of submarine tunnel，construction for the fault fracture zone，construction of the shallow crossing large span，construction of rooms with small clear distance，construction of crossing chambers，and rapid construction with boring blast method． The construction risk management information system was set up． The double － channel grouting device and the new technique of the rapid curtain grouting without grouting stop wall for the fracture rock ( fault fracture zone ) were developed． The construction technologies for plane crossing chambers and stereoscopic crossing chambers were optimized and the set complete technology of the boring and blast was summarized for promoting the progress of the Chines technology for construction of submarine tunnel．