철도 강화노반 재료의 회복탄성계수 평가

초록

Reinforced trackbed is an important part of railway track as layer which supports track and should have a suitable elasticity and is composed of the subballast and GCS(graded crushed stone). Therefore, it is required to more reasonably evaluate the behavior and performance of reinforced trackbed. However, it was difficult to carry out laboratory test for engineering properties since maximum grain size of subballast is 40mm and that of GCS is 125mm. In this study, we performed cyclic large triaxial tests in order to evaluate the resilient modulus for the reinforced trackbed materials. In this test we evaluated the effect of some test conditions such as grain size distribution, compacted water content, maximum grain size and loading frequency on the resilient modulus.