Abstract :
Groundwater has an important influence to landslide stability, therefore, how to effectively drain off the groundwater from large-scale landslide have always been a hot research topic, this paper, first of all, summarizes conventional slope drainage measures and their respective serviceability, then carries out computational analysis, it puts forth drainage tunnel can effectively lower the water level and increase landslide safety factor, on the ground of detailed geological investigation and theoretical analysis, drainage tunnel was successfully applied to the treatment of some large-scale landslide, results showed that the drainage effects was much more better than expected, this effectively guaranteed landslide´s stability and treatment effects, hence, drainage tunnel is a good way to descend water level.
