COMPARATIVE ANALYSIS OF THE INFLUENCE OF SOFT SOIL LAYER ON SITE CLASSIFICATION BETWEEN CHINESE CODE GB 50011—2001 AND EUROCODE 8

For several sites with soft soil layer,the difference of site classification between Chinese code GB 500112001 and European code Eurocode 8 is studied in this paper.Firstly,the shear wave velocity of ordinary site,site with soft interlayer within 20 m depth,site with soft soil layer below 20 m depth is computed,and the site classification is classified according to GB 500112001 and Eurocode 8 respectively.Then,the comparative analysis is carried out,it is found that the thickness of soft soil layer is more vulnerable to change site classification of Eurocode 8 than that of GB 500112001 for site with soft interlayer within 20 m depth,which is considered more carefully in Eurocode 8 for site with soft soil layer below 20 m depth.It is suggested that the influence of soft soil layer should be further considered in China code,and the calculation depth should be further extended from 20 m.