Abstract: The present paper analyses the effect of runoff water and underground water on the stability of Douyapent landslide in Wanxian according to the site observations for two years. The analysis shows that landslide deformation is closely related to the runoff water and underground water. Excessive water to the landslide body softens soil and reduces resistant shear stress resulting in lower stability of landslide. An appropriate method of cutoff ditch located along up-edge of the landslide can lower underground water level dramatically. Later, almost digging pile-holes show that up and bottom interfaces of the landslide became dry and healed, and the stability of landslide could increase about more than 1.7 times.

摘要： 滑坡的形成，除了地质构造和地貌方面的因素外，主要是加载、坡脚开挖和水的作用．本文就水对万县市豆芽棚滑坡的影响进行分析．通过近两年的现场观测资料表明，滑坡的形成和发展与水的活动有密切关系．在滑体后缘采用截水沟降低地下水位效果显著．原处于地下水位以下的滑面已变干并且开始愈合，仅排水措施一项，上滑面稳定安全系数可提高到1.7倍．这再一次证明了排水对治理滑坡的重要作用．

关键词: 滑坡, 排水