국내 지반구조물의 조립지반재료에 대한 동적물성 평가

초록

Coarse granular materials have been used as fill materials in geotechnical structures such as dam, railway and road embankment. Since these are very important infrastructures, most of engineers agree on the need for seismic design of them. Therefore, it is required to reasonably evaluate the dynamic properties of coarse granular materials. However, it is in practice so difficult to test in every case, since the element test for coarse granular materials are time-consuming, labour intensive and expensive. Hence, in this study, we carried out the large cyclic triaxial tests for reinforced subgrade, transition gravel, and upper subgrade materials used in railway, and presented the Young’s modulus and damping ratio for these materials in small strain range.