관입시험을 이용한 상부노반의 최대전단강성계수(G_max) 평가 연구

초록

For the provision of safe railway transportation services, shear stiffness, which mainly affects the dynamic behavior of the subgrade, should be characterized. The purpose of this study is the evaluation of the shear wave velocity and the maximum shear modulus of the railway subgrade using two dynamic cone penetrometers equipped with accelerometers. The travel time of the shear wave is evaluated using the accelerometers, and the distance between two dynamic cone penetrometers is considered as the travel distance. The maximum shear modulus is estimated using the calculated shear wave velocity and the density of the subgrade determined by the in-situ density test. The dynamic cone penetrometer equipped with accelerometer can be used for the evaluation of the maximum shear modulus of the railway subgrade.