分析拱顶下沉、水平收敛以及内力量测对隧道结构安全的敏感性，结果表明大跨度海底隧道采用CRD法施工时，以隧道拱顶下沉为主作为施工监测控制基准比较合理。结合在建的厦门翔安海底隧道现场监测数据和工程险情资料，对该隧道CRD法（导坑施工顺序1-3-2-4）施工位移判定基准进行了研究，给出了拱顶下沉量以及拱顶下沉速率的控制基准。研究结果为厦门翔安海底隧道信息化施工和现场控制提供了依据，也为今后类似工程积累了经验。

The influence of the crown settlement, horizontal convergence and structure stress on the safety of the tunnel structures is analyzed, which indicates that it is reasonable to take the crown settlement as the construction monitoring control criteria for large spanned subsea tunnels constructed by CRD method. A study is made on the construction monitoring control criteria of Xiamen Xiang’an subsea tunnel constructed by CRD method with the heading excavation sequence being in the order of 1324 and crown settlement control criteria and crown settlement rate control criteria are proposed. The research results have provided basis for the informationaided construction and insitu displacement control of Xiamen Xiang’an subsea tunnel and other similar works in the future.