复杂地质条件下 ,隧道的设计与施工是一个复杂的系统工程。从工程设计的程序、软弱岩体中隧道的极限变形量及岩体强度的估计、各种支护的最大支护压力等理论 ,以及实际施工中包括开挖顺序和对水的控制等技术 ,对复杂地质条件下的隧道设计与施工的关键问题进行探讨 Under complex geological conditions, the design and construction of the tunnel is a complicated systematic project. From the engineering design program, the limit deformation of tunnel in soft rock mass and the strength of rock mass, the theory of maximum support pressure of various supports and so on, as well as the actual construction including the excavation sequence and the control of water, The key issues of tunnel design and construction under complex geological conditions are discussed