SOIL/BEDROCK CHARACTERISATION AND ENGINEERING PARAMETERS CALCULATIONS FOR THE KANTO REGION, CENTRAL JAPAN

Shokry, M.M.F.; Hirata, N.

doi:10.21608/jegs.2010.380915

SOIL/BEDROCK CHARACTERISATION AND ENGINEERING PARAMETERS CALCULATIONS FOR THE KANTO REGION, CENTRAL JAPAN

Document Type : Original Article

Authors

M.M.F. Shokry ¹
N. Hirata ²

¹ 1- Department of Geophysics, Faculty of Science, Ain Shams University, Cairo, Egypt, 11566

² 2- Earthquake Prediction Research Centre, Earthquake Research Institute, Tokyo University, Japan

10.21608/jegs.2010.380915

Abstract

Data from K-NET and KiK-net were used to evaluate regional site effects in the Kanto region. The present study delineates some of the shallow soil/bedrock engineering characteristics for construction purposes. A number of engineering parameters, such as Concentration Index Ci, Material Index γ, Density Gradient Di and Stress Ratio Si, were estimated using K- and KiK-NETS data together with shallow/deep borehole recordings obtained from the pre-Tertiary basement. Estimated parameters, which include seismic velocity values, engineering, consolidation and strength parameters showed that, these parameters are strongly correlated with the structure of the sedimentary layer-bedrock system in the Kanto region. The present study also delineates the usefulness of the K-NET and KiK-net data, which are now available on the internet site (www.k-net.bosai.go.jp/).