为解决滨海地区跨海隧道选线难题，依托妈湾跨海通道工程，在分析影响海底隧道建设安全的地质因素的基础上，从隧道线位地质适应性角度出发，综合考虑地质条件、设计方案、施工方法等因素，基于打分制提出选线快速评价模型。模型包含平面曲率半径、纵坡坡度、抗浮安全系数、隧道埋深、与平面控制因素水平距离、差异沉降6项评价指标。选线快速评价模型前5项指标不满足设计要求时采用一票否决制，差异沉降指标考虑地下水位、土层性质、土层厚度、先期固结压力、车辆荷载等因素的影响，依据分层总和法计算隧道沉降； 同时，结合经验法推导出沉降曲率半径计算公式，并将沉降曲率半径划分为5个等级，从而构建出妈湾跨海通道工程隧道选线快速评价模型，并将其嵌入到三维参数化选线分析平台，实现隧道地质参数快速选取和隧道线位快速评价。采用选线快速评价模型对妈湾跨海通道3条盾构线位进行选线评价，评分分数分别为79.3、71.3、84.1，对隧道选线设计具有一定的参考意义。

The route selection of seacrossing tunnel is very important. Hence, the geological factors that affecting the construction safety of subsea tunnel is analyzed, and based on marking system, a fast evaluation model for route selection of Mawan seacrossing tunnel is proposed from the perspective of geological adaptability of tunnel route and factors such as geological conditions, design scheme and construction method. The model includes 6 indices, i.e. plane curvature radius, longitudinal gradient, antifloating coefficient, tunnel buried depth, horizontal distance from the plane control factors and differential settlement. When the indices, except differential settlement, cannot meet the design requirement, one vote system should be adopted. The influences of groundwater level, soil properties, soil thickness, preconsolidation pressure, vehicle load, etc. on differential settlement index should be considered when calculating tunnel settlement by layersummation method. Meanwhile, the radius of settlement curvature is divided into 5 levels after calculated by empirical method. Thus, the fast route evaluation model of Mawan seacrossing tunnel is established and then embedded into the threedimensional parametric selection line analysis platform, which could realize rapid selection of tunnel geological parameters and fast evaluation of route selection. According to the fast route evaluation model, the scores of the 3 shield routes of Mawan seacrossing tunnel are 79.3, 71.3, 84.1, respectively, which can provide reference for the selection of tunnel route.