Effect of tyre crumbs on the stability of sand under constant shear drained stress

IF 1.3 Q3 ENGINEERING, GEOLOGICAL
Shabir Ahmed, J. Vinod, M. Sheikh
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引用次数: 0

Abstract

The instability of earth structures resting on granular materials, such as embankments and tailing dams, is caused by the infiltration of water which can lead to their failure. This paper presents the potential use of tyre crumbs for controlling the stability of structures made of sand. Constant shear drained experiments were carried out on mixtures of sand and tyre crumbs to understand the onset of instability. Conventional drained shear tests were carried out on all samples up to a deviator stress of 200 kPa. Tests were then carried out on the sheared samples by reducing the confining pressure until the onset of instability. This was determined by a drop in stress, by second-order work and by the strain ratio approach. The value of mean effective stress at instability was found to decrease with the addition of tyre crumbs to the mix of up to 20% and then increase with further addition of tyre crumbs. The strain ratio approach was found to predict the onset of instability easily and efficiently, similar to the second-order work method.
恒定剪切排水应力下轮胎碎屑对砂土稳定性的影响
基于颗粒材料的土质结构的失稳,如堤防和尾矿坝,是由水的渗透引起的,水的渗透会导致土质结构的破坏。本文介绍了轮胎碎屑在控制砂土结构稳定性方面的潜在用途。采用恒剪切排水试验对砂土和轮胎碎屑的混合物进行了试验,以了解其失稳的发生。对所有试样进行常规排水剪切试验,直至偏差应力为200 kPa。然后通过降低围压对剪切试样进行试验,直到失稳开始。这是由应力下降、二阶功和应变比法确定的。不稳定时的平均有效应力值随着掺量达到20%而减小,然后随着掺量的增加而增大。结果表明,应变比法与二阶功法相似,能方便、有效地预测失稳的发生。
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
CiteScore
3.10
自引率
8.30%
发文量
54
期刊介绍: Ground Improvement provides a fast-track vehicle for the dissemination of news in technological developments, feasibility studies and innovative engineering applications for all aspects of ground improvement, ground reinforcement and grouting. The journal publishes high-quality, practical papers relevant to engineers, specialist contractors and academics involved in the development, design, construction, monitoring and quality control aspects of ground improvement. It covers a wide range of civil and environmental engineering applications, including analytical advances, performance evaluations, pilot and model studies, instrumented case-histories and innovative applications of existing technology.
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