针对厦门翔安海底隧道的实际施工情况,以该隧道的工程地质和围岩级别作为一级分区指标,隧道埋深为二级分区指标,地下水为三级分区指标,围岩及初期支护变形为四级分区指标。采用由整体到局部、由粗略到详尽的分区原则进行逐级分区,最终得到主隧道以及服务隧道的分区情况,使得海底隧道的维修养护工作和长期监测工作更具有针对性和着重性。 According to the actual construction situation of Xiamen Xiang’an Subsea Tunnel, taking the engineering geology and surrounding rock level of the tunnel as the first-level regional index, the tunnel depth is the second-level regional index, the groundwater is the third-level regional index, the surrounding rock and initial support deformation Divided into four indicators. The whole-to-local and step-by-step zoning from rough to exhaustive zoning results in the zoning of main tunnels and service tunnels, which makes the maintenance and long-term monitoring of subsea tunnels more targeted and focused.