我国第一条大断面海底隧道——厦门翔安海底隧道在浅滩及陆地段穿越富水软弱地层，围岩自稳能力差，极易发生涌水突泥，严重威胁施工的安全性。通过对隧道开挖方案的对比分析和根据施工现场监控量测的结果，对隧道穿越富水软弱地层的开挖施工方案、降排水关键技术和超前预加固方案进行了研究，为隧道施工提供技术支持。

Xiang'an sub-sea tunnel is the first large section sub-sea tunnel in China, and will cross the weak stratum with abundant water. As the low stabilizing capacity of the surrounding rocks, water inrush is the maximal risk during the sub-sea tunnel construction. In this paper, based on analyzing the excavation method of the tunnel and results of on site monitoring measurement, we studied the excavation method,drainage technique and pre-reinforcement method of the tunnel when crossing the weak stratum with abundant water, and offer technological support for construction.