Stability Analysis of a passageway by the Vibration of High-Speed Train

초록

Recently Honam high-speed railroad line is constructed in southern part of Korea. This line is for next generation HST named HEMU-430X. But there is a limestone mine near Honam HSR line and this mine will make a process to dig a passageway under Honam line. In this case, safety of railroad system and stability of mine are crucial problems on both sides. By measuring mine blasting vibration and calculating regression equation, effect of mine blasting to train running is investigated quantitatively. Applying 0.5kine (cm/sec) as a management specification, safe region of mine blasting is defined. Train induced vibration is also investigated to evaluate stability of mine. There are 19 geological weak regions under railroad line by Electrical Resistivity Surveys (ERS). And degree of rock mass and properties of a surface of discontinuity are investigated. Using these results and various soil properties, optimum location of a passageway is determined and numerical analysis is executed for evaluating the stability of a passageway by discontinuity. Location and shape of a passageway is determined by comparing results of vibration propagation properties.