Journal Published Online: 07 August 2020
Volume 44, Issue 4

Estimation of Undrained Shear Strength of Overconsolidated Clay Using a Maximum Excess Pore Pressure Method Based on Piezocone Penetration Test (CPTU)

CODEN: GTJODJ

Abstract

Many methods can be used to evaluate the undrained shear strength (su) in unconsolidated or normally consolidated clay. However, among the many methods, few methods can be used to evaluate the su value in overconsolidated clay. In this paper, based on the piezocone penetration test (CPTU), the maximum excess pore pressure method (Δumax) was adopted to estimate the su in overconsolidated clay. In addition, three different test sites (in China) with overconsolidated clays were selected to verify the feasibility of this method. The test results show that the maximum pore pressure cone factor (NΔumax) significantly affected the evaluation of su. Moreover, the NΔumax values (8.10, 8.70, and 8.44) for 3 test sites in Yancheng, Nanjing, and Changzhou were obtained and can provide a valuable reference for evaluating su for in situ tests with overconsolidated clay.

Author Information

Liu, Lulu
Institute of Geotechnical Engineering, Southeast University, Nanjing, People’s Republic of China School of Engineering, University of Warwick, Coventry, UK
Cai, Guojun
Institute of Geotechnical Engineering, Southeast University, Nanjing, People’s Republic of China
Liu, Xiaoyan
Institute of Geotechnical Engineering, Southeast University, Nanjing, People’s Republic of China
Li, Xuepeng
Institute of Geotechnical Engineering, Southeast University, Nanjing, People’s Republic of China
Liu, Songyu
Institute of Geotechnical Engineering, Southeast University, Nanjing, People’s Republic of China
Puppala, Anand J.
Zachry Department of Civil and Environmental Engineering, Texas A&M University, College Station, TX, USA
Pages: 10
Price: $25.00
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Stock #: GTJ20190248
ISSN: 0149-6115
DOI: 10.1520/GTJ20190248