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

被引：3

作者：

Liu, Lulu ^{[1
,2
]}

Cai, Guojun ^{[1
]}

Liu, Xiaoyan ^{[1
]}

Li, Xuepeng ^{[1
]}

Liu, Songyu ^{[1
]}

Puppala, Anand J. ^{[3
]}

机构：

[1] Southeast Univ, Inst Geotech Engn, Nanjing 211189, Peoples R China

[2] Univ Warwick, Sch Engn, Coventry CV4 7AL, W Midlands, England

[3] Texas A&M Univ, Zachry Dept Civil & Environm Engn, Room 801B,Dwight Look Engn Bldg DLEB, College Stn, TX 77843 USA

来源：

GEOTECHNICAL TESTING JOURNAL | 2021年 / 44卷 / 04期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

undrained shear strength; maximum excess pore pressure method; overconsolidated clay; piezocone penetration test; FIELD; RESISTANCE;

D O I：

10.1520/GTJ20190248

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Many methods can be used to evaluate the undrained shear strength (s(u)) 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 (Delta u(max)) was adopted to estimate the s(u) 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 (N-Delta umax) significantly affected the evaluation of su. Moreover, the N-Delta umax 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 s(u) for in situ tests with overconsolidated clay.

引用

页码：1153 / 1162

页数：10

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