Rail Transport Operation Control for Railway Embankment under rainfall
강우시 성토사면의 열차운전규제기준
- Kim, Hyun-Ki (Railroad structure, Korea Railroad Research Institute) ;
- Shin, Min-Ho (Railroad structure, Korea Railroad Research Institute) ;
- Choi, Chan-Yong (Railroad structure, Korea Railroad Research Institute)
- Published : 2009.09.25
Infiltration of rainfall causes railway slopes to be unstable and may result in failure. Basic relationship between the rainfall and stability of railway embankment is defined to analyze its stability by rainfall. An experimental study for defining of infiltration rate of rainfall into slope is conducted in the lab. The results of Rainfall infiltration show that rainfall infiltration is not equal to infiltration as like reservoir because 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. And suggested rainfall index is compared with the rail transport operation control which is used in KORAIL. It is judged that this rainfall index can be a good tool for the rail-transport operation control.