2023 Volume 79 Issue 13 Article ID: 22-13017
The design values for soil strength used in the seismic diagnosis of existing railway embankments are determined based on laboratory soil tests of samples taken from them and density logging. The conventional design values cannot take into consideration the variability of the existing embankments such as the denseness caused by the cyclic loading of the train, so it is due to the sampling location that is away from the railway tracks. In this study, to advance the seismic diagnosis method, the design values considered the unsaturated strength of the materials and the shear wave velocity distribution obtained by the surface wave method were evaluated. As a result, it is possible to estimate the density distribution in the existing embankment by the surface wave method. In addition, the design value resistance improves considering the unsaturated strength characteristics of the embankment materials. It is possible to make a more rational seismic diagnosis.
