THE DEVELOPMENT OF RAIL TRANSPORT OPERATION CONTROL USING THE VARIATION OF SLOPE STABILITY UNDER RAINFALL

초록

Infiltration of rainfall causes railway embankment to be unstable and may result in failure. Basic relationship between the rainfall and stability of railway embankment is defined to analyze the stability of embankment by rainfall. An experimental study for defining of infiltration rate of rainfall into slope is conducted in the lab. The results of rainfall infiltration test show that the situation of rainfall infiltration into the slope is not equal to the situation of infiltration as like reservoir because the rate of rainfall infiltration is controlled by slope angle. Based on these results, boundary condition of rainfall is altered and various numerical analysis are performed. The variation of shear strength, the degree of saturation and pore-water pressure for railway slope during rainfall can be predicted and the safety factor of railway slope can be expressed as the function of rainfall amount, namely rainfall index. Therefore, it is judged that this rainfall index can be a good tool for the rail-transport operation control."