Direct Shear Test and Shear Strength Model of Clay-Filled Joints

IF 5.8 4区工程技术 Q1 MECHANICS

Applied Rheology Pub Date : 2021-01-01 DOI:10.1515/arh-2020-0119

L. Chang, Yanlin Zhao, Yixian Wang, T. Tan

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引用次数: 0

Abstract

Abstract To better study the shear characteristics of infilled joints with soil having different moisture contents, the influence of the moisture content on the shear characteristics of the infilled joint was explored in this paper, and a revised shear strength model of infilled joint surface is proposed. The results show that the shear dilatation modes of joints can be divided into four types: pure shear dilatation, pure shear compression, shear dilation-shear compression and shear compression-shear dilation. As the joint roughness coefficient (JRC) value increases, the normal displacement of the joint surface gradually increases during the shearing process and the normal stress has an inhibitory effect on dilatation. The infill material will weaken the peak shear stress of the joint surface. When the JRC value of joint surface is small, the weakening effect of soil with moisture content of 30% on peak shear stress is obvious. The revised joint roughness coefficient-joint wall compressive strength (JRC-JCS) model of infilled joint is proposed and the maximum shear stress value calculated by the model has a good linear relationship with the test value.

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粘土填充接缝的直剪试验及抗剪强度模型

摘要为了更好地研究不同含水率的填土节理的抗剪特性，本文探讨了含水率对填土节理抗剪特性的影响，提出了一种修正的填土节理表面抗剪强度模型。结果表明:节理的剪胀模式可分为纯剪胀、纯剪压、剪胀-剪压和剪胀-剪胀四种;随着节理粗糙度系数(JRC)的增大，节理表面的法向位移在剪切过程中逐渐增大，正应力对剪胀有抑制作用。填充物会减弱节理面峰值剪应力。当节理面JRC值较小时，30%含水率的土体对峰值剪应力的减弱作用明显。提出了修正的节理粗糙系数-节理壁抗压强度(JRC-JCS)模型，该模型计算的最大剪应力值与试验值具有良好的线性关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Rheology 物理-力学

CiteScore

3.00

自引率

5.60%

发文量

审稿时长

>12 weeks

期刊介绍： Applied Rheology is a peer-reviewed, open access, electronic journal devoted to the publication in the field of applied rheology. The journal provides the readers with free, instant, and permanent access to all content worldwide; and the authors with extensive promotion of published articles, long-time preservation, language-correction services, no space constraints and immediate publication.