Temperature effects on the volume change behaviour of Boom clay
Temperature effects on the volume change behaviour of Boom clay
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DOI：
10.1016/s0013-7952(01)00143-0
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发表时间：
2002-05
影响因子：
7.4
通讯作者：
N. Sultan;P. Delage;Yu-Jun Cui
中科院分区：
文献类型：
--
作者：
N. Sultan;P. Delage;Yu-Jun Cui
本文通过室内试验研究了温度对Boom粘土前期固结压力的影响和超固结比（OCR）对热体积变化的影响。在这项研究中，OCR定义为各向同性应力，而不是常用的垂直应力在土力学。试验是在能够承受高压的温控各向同性压缩单元中进行的。根据实验结果，现有的热塑性模型进行了检查。为了充分考虑OCR对体积变化行为的影响，提出了一种附加的塑性机制。
In this paper, an experimental study intended (1) to identify the effect of temperature on the preconsolidation pressure of Boom clay and (2) the effect of the over consolidation ratio (OCR) on the thermal volume changes is presented. In this study, OCR is defined in terms of isotropic stresses instead of the commonly used vertical stresses in soil mechanics. Tests were carried out in a temperature-controlled isotropic compression cells able to sustain high pressures. Based on the experimental results obtained, existing thermoplastic models are examined. In order to fully account for the effects of OCR on the volume change behaviour, an additional plastic mechanism is proposed.