A. 公路路基排水设计应采取堵、截为主，防排疏结合的原则进行，形成完善的排水系统
B. 公路排水设计应遵循总体规划、合理布局、少占农田、环境保护的原则
C. 排水困难地段可采取降低地下水位，设置隔离层等措施，使路基处于干燥、中湿状态
D. 各类排水设施的设计应满足使用功能要求，结构安全可靠、便于施工、检查和养护维修
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