Effects of clay content and penetration rate on the CPTU test of silty soil in the Yellow River delta
DING Chenhao
LIU Yunuo
ZHENG Jianguo
DENG Shenggui
Abstract：In this paper,the influence of clay content and penetration rate on the critical state parame-ters and consolidation coefficient of silty soil in the Yellow River delta was discussed by using the labo-ratory geotechnical test method,and the calculation method of the critical state parameters of silty soil in the Yellow River delta was summarized.Based on the CPTU experiment,the influence law of clay content on the skeleton curve of rate effect of silty soil was discussed.The"Nkt-V"and"Bq-V"rate effect of silty soil with different clay content was summarized by adopting the normalized penetration rate V=vD/cv.The results showed that the boundary between fully drained and partially drained re-gions was V=0.45,and the boundary between partially drained and completely undrained regions was V=30.The recommended values of the cone-tip resistance coefficient Nkt for the reconstructed silty soil without drainage were 9.6～10.3,which could be used for the inversion of the strength parameters of silty soil in the Yellow River delta region.The research results can provide reference for the evalua-tion of seabed stability in the region.
Keywords：CPTUsilty soilclay contentpartial drainageseabed stability
Publication Date：2025-06-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：10( 130-139 )