评估粘土的摩擦角:压锥试验与阿特伯格极限

IF 2 4区工程技术 Q3 ENGINEERING, GEOLOGICAL Proceedings of the Institution of Civil Engineers-Geotechnical Engineering Pub Date : 2023-01-10 DOI:10.1680/jgeen.22.00135

Z. Ouyang, P. Mayne

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引用次数: 0

摘要

极限塑性解评估有效应力摩擦角的粘土从压电锥试验进行了评估，并与流行的概念使用实验室阿特伯格极限对重塑的标本进行了比较。结果表明，与三轴压缩试验获得的室内基准值相比，基于原位压电锥的方法对155个单独粘土的摩擦角值提供了比塑性指数经验相关性更准确和可靠的解释。例如，基于压电体的方法成功地捕获了四种摩擦角为20 - 37°的粘土的有效应力参数:室内试验中的正常固结高岭土、英国Bothkennar的天然软粘土、北海的Troll海上粘土和哥伦比亚波哥大的软塑性湖相沉积物。

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Evaluating friction angles for clays: piezocone tests versus Atterberg limits

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°: 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.

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来源期刊

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering 工程技术-地球科学综合

CiteScore

4.40

自引率

4.50%

发文量

审稿时长

3 months

期刊介绍： Geotechnical Engineering provides a forum for the publication of high quality, topical and relevant technical papers covering all aspects of geotechnical research, design, construction and performance. The journal aims to be of interest to those civil, structural or geotechnical engineering practitioners wishing to develop a greater understanding of the influence of geotechnics on the built environment.