Journal of the Korean Geo-Environmental Society ISSN:1598-0820(Print) 2714-1233(Online) 한국지반환경공학회 논문집

The objective of this study is to evaluate the stability of existing railway roadbeds by analyzing temporal changes in ground conditions using boring test results and assessing the factor of safety through numerical analysis techniques. The study area is a railway facility located in Jeongseon-gun, Gangwon-do. A comparative analysis was conducted between the initial roadbed geometry and design concepts and the results of recent boring tests. The investigation revealed discrepancies between the actual ground conditions and those assumed during the initial design phase, particularly regarding the distribution characteristics of the upper fill and colluvial layers, as well as the depths of soft and hard rock. Incorporating these observed conditions, a two-dimensional numerical model was established, and a stability evaluation was performed using the Limit Equilibrium Method (LEM). The results quantitatively demonstrate the impact of temporal changes in ground properties on the overall stability of the railway roadbed. Consequently, this study is expected to provide fundamental data valuable for the future maintenance and reinforcement design of railway roadbeds.