Role of initial effective stress on the thermal volume change of normally consolidated clay
Role of initial effective stress on the thermal volume change of normally consolidated clay
复制标题
初始有效应力对正常固结粘土热体积变化的影响
DOI：
10.1051/e3sconf/202020509001
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发表时间：
2020
影响因子：
--
通讯作者：
McCartney, John S.
中科院分区：
文献类型：
--
作者：
Samarakoon, Radhavi;McCartney, John S.
本文重点介绍正常固结的乔治亚高岭石的热三轴试验结果。本研究评估的假设是初始平均有效应力是否对排水加热过程中遇到的热体积变化有影响。为此，本研究考虑了处于三种不同初始平均有效应力的样本。首先将粘土样本各向同性固结到正常固结状态，然后进行排水加热冷却循环，然后进一步机械加载至更高的有效应力。结果表明，在排水加热过程中，体积应变随着初始平均有效应力的增加而增加。在随后的冷却过程中观察到体积的回弹，其中随着初始平均有效应力的增加，体积的净变化从样本的零体积变化转变为加热冷却循环后样本的净收缩。结果表明，在评估原位加热作为土壤改良方法时，需要考虑初始平均有效应力的影响。
This paper focuses on the results from thermal triaxial tests on normally consolidated Georgia Kaolinite. The hypothesis evaluated in this study is whether the initial mean effective stress has an impact on the thermal volume change encountered during drained heating. To that effect, specimens at three different initial mean effective stresses were considered in this study. The clay specimens were first isotropically consolidated to a normally consolidated state, then subjected to a drained heating cooling cycle followed by further mechanical loading to higher effective stresses. The results indicate contractive volumetric strain during drained heating where the volumetric strain was found to increase with increasing initial mean effective stress. A rebound in volume was observed during subsequent cooling where the net change in volume transitioned from zero volume change of the specimen to net contraction of the specimen after a heating cooling cycle as the initial mean effective stress increased. The results indicate the need for considering the effect of initial mean effective stress when assessing in-situ heating as a method of soil improvement.
排水加热和冷却对常固结粘土不排水抗剪强度的影响
DOI：
10.1007/978-3-319-99670-7_31
发表时间：
2018
期刊：
Springer Series in Geomechanics and Geoengineering
影响因子：
--
作者：
R. Samarakoon;I. Ghaaowd;J. McCartney
通讯作者：
J. McCartney