Settlement of concrete slab track considering principal stress axis rotation in subgrade

摘要

Slab tracks on earth structures are widely constructed in Japanese high speed railways. Thoseslab tracks require significantly high performance against residual settlement under repeated train loads. Inthe design standard of earth structures in Japan, quality of soil materials and compaction control are strictlyprescribed; however, construction cost becomes relatively high. If the prediction of residual settlement underrepeated train load becomes possible, the design of earth structures for slab tracks will become more rational. Inthis study, to discuss residual settlement under repeated train road, scale model tests, FEM analysis and principalaxis rotation tests were carried out. Based on the results of those tests and analysis, prediction method of residualsettlement under moving wheel loading was discussed.