Characteristic Behaviors of Revised Reinforced Roadbed with Rigid Facing for Urban Railway Transit

초록

This paper evaluates the performance of reinforced roadbed with rigid facing at serviceability conditions. To do so, small scale model tests (1/10 scale) and full scale tests were performed. The tests for two types of roadbed, 1) roadbed with rigid wall, 2) roadbed with segmental wall were performed to evaluate the deformation behaviors of them under train loading. The factors affecting them were evaluated with the change of gaps between geogrids and lengths of geogrids and variation of loading locations. From test results, the performance of reinforced roadbed with rigid face wall under train loading was higher than that of roadbed with segmental wall. It will have better performance for new type concrete slab structures having a strict limitation of settlement. And also, in economical viewpoint, we found out some clues to reform reinforced roadbed with rigid facing for applying it as a railroad subgrade structures in Korea.