Evaluating friction angles for clays: piezocone tests compared with Atterberg limits

被引：1
|
作者：
Ouyang, Zhongkun [1 ]
Mayne, Paul W. [2 ]
机构：
[1] Tsinghua Shenzhen Int Grad Sch, Inst Ocean Engn, Shenzhen, Peoples R China
[2] Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA USA
来源：
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING | 2023年 / 177卷 / 02期
关键词：
clay plasticity index; cone penetration test; effective stress friction angle; geomaterial characterisation; in situ testing; laboratory tests; BEHAVIOR;
D O I：
10.1680/jgeen.22.00135
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
A limit plasticity solution for evaluating the effective stress friction angle in clays from piezocone tests was assessed and compared with the popular notion of using laboratory Atterberg limits on remoulded specimens. The results showed that the in situ piezocone-based method provided a far more accurate and robust interpretation of the friction angle values of 155 separate clays than empirical correlations with plasticity index when compared with laboratory benchmark values obtained from triaxial compression tests. For illustration, the piezocone-based method was shown successfully to capture the effective stress parameter of four clays with friction angles of 20-37 degrees: normally consolidated kaolin clay in chamber tests; natural soft clay deposit located at Bothkennar, UK; Troll offshore clay in the North Sea; and soft plastic lacustrine deposits in Bogota, Colombia.
引用
收藏
页码：147 / 157
页数：11
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