Safety Management of Korean Railway Slopes by Infiltration of rainfall using Reliability analysis

초록

Slope stability is affected by various factors. For safety management of slopes, monitoring systems have been widely constructed along railway lines. The representative data from the systems are variations of ground profile such like ground water level and pore water pressure etc. and direct displacement measured by ground clinometer and tension wire sensor. Slopes are mainly effected by rainfall and rainfall causes the decrease of safety factor(FOS). Because FOS varies linearly by the variation of rainfall condition and pore pressure, it has a weak point that could not define the time and proper warning sign to secure the safety of the train. In this study, alternatives of FOS such as reliability index, probability of failure and velocity of probability of failure are applied to slope stability analysis introducing the reliability concept. FOS, reliability index, probability of failure and velocity of probability of failure of the slopes by infiltration of rainfall are investigated for setting up the specification of safety management of slopes. By executing case study of several slopes, it is shown to be applicable to specification of safety management.