연약지반 침하 억제를 위한 성토지지 말뚝 공법 적용성 평가

초록

When railroad structure is constructed on soft ground, long-term settlement due to static dead load and dynamic train load could cause a number of problems, such as reduction of safety and ride quality. In order to resolve this problem, Geosynthetic-reinforced and Pile-supported(GRPS) embankment method is widely used to construct structures on the soft soil due to restraining residual settlement and their rapid construction. The load transfer mechanism of GRPS system is that almost external load is transferred on the pile by arching effect and tensile strength of geogrid. In this paper, static and cyclic loading tests were conducted to investigate load transfer characteristics of pile-supported embankment under additional loading. Based on test results, the load transfer mechanism is analyzed and verify the efficiency of GRPS method.