Influence Research on Water Environment of the Underground Engineering Excavating in Karst Area

Tianchi tunnel from construction to now has occurred 9 serious water inrush (gushing) accidents, resulting in a large number of economic, social and ecological damage to the environment. This paper carried out thorough theoretical analysis and field observation from Tianchi tunnel stratum rock properties, engineering geology, hydrogeology, the surrounding patch, runoff and drainage and the changes of surface water environment, as well as tunnel excavating. The reasons that had obtained from the previous 9 water inrush (gushing) of Tianchi tunnel. Some effective references had put forward for the engineering treatment, provided some valuable references for other similar underground engineering construction.