复式向斜岩溶台地地质条件复杂，隧道穿越时，多发生突水涌泥等地质灾害。以安平隧道为例，在隧道线路设计初期，从地质角度出发，分析隧道线路范围内存在的5个主要地质问题及可能发生的地质灾变风险，并逐一对其进行评估和评价；采用宜避不宜扰的地质选线理念，根据评价结果选择路线绕避方案和确定平纵设计指标。研究成果对类似复杂地质条件下的岩溶台地隧道地质选线和路线设计具有一定的借鉴意义。

The geological conditions of the karst terrace of synclinore are complicated. Geological disasters such as water inrush and mud outburst often occur when the tunnel crosses it. The Anping Tunnel was taken as an example. In the early stage of the design of the tunnel route, from the geological perspective, five main geological problems and possible geological disaster risks within the scope of the tunnel route were analyzed and evaluated one by one. And the concept of geological route selection of avoidance without disturbance was used. The route avoidance scheme was selected according to the evaluation results and the horizontal and vertical design indicators were determined. The research results have certain reference significance for geological route selection and route design of tunnels on the karst terrace under similar complicated geological conditions.