结合工程实例，介绍了进口端位于浅埋、沟槽软土等不良地质隧道的工程实践。
Combined with engineering example, the construction practice of tunneling is introduced for the tunnel whose entrance stand at harmful geologic conditions of shallow cover and groove with soft soil.
隧道穿越不良地质段施工技术的研究。
Do research on tunnel passing through bad geological section.
岩溶是地下水地质作用的过程和结果，是隧道建设面临的不良地质现象之一。
Karst is a process and result of groundwater geologic function and it is one of bad geological phenomenon facing tunnel construction.
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