Thermally induced volume change and excess pore water pressure of soft Bangkok clay
Thermally induced volume change and excess pore water pressure of soft Bangkok clay
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DOI：
10.1016/j.enggeo.2006.10.002
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发表时间：
2007-01
影响因子：
7.4
通讯作者：
H. Abuel-Naga;D. Bergado;A. Bouazza
中科院分区：
文献类型：
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作者：
H. Abuel-Naga;D. Bergado;A. Bouazza
本文介绍了一项实验研究的结果，该实验研究了软曼谷粘土在排水加热条件下热致体积变化和不排水加热条件下热致超孔隙水压力。分别使用改进的里程计和三轴测试装置将粘土从室温 (25°C) 加热到 90°C。研究发现，在研究的温度范围内，粘土表现出温度引起的体积变化和温度引起的超孔隙水压力，这主要取决于应力历史。本研究提出了一种理论微观结构机制，可以解释不同应力条件下热致体积变化行为。此外，利用典型土壤固结曲线的卸载-重载滞后现象解释了不同应力条件下热致超孔隙水压力的行为。这项研究的结果提供了额外的数据，可以增强对饱和粘土热机械行为概念的理解。
This paper presents the results of an experimental investigation carried out to study thermally induced volume changes under drained heating condition and thermally induced excess pore water pressures under undrained heating condition of soft Bangkok clay. The clay was heated up from room temperature (25 °C) to 90 °C using a modified oedometer and a triaxial test apparatus, respectively. The clay was found to exhibit temperature induced volume changes and temperature induced excess pore water pressures, in the range of temperatures investigated, depending mainly on the stress history. A theoretical microstructure mechanism that can interpret the thermally induced volume change behaviour at different stress conditions is presented in this study. Furthermore, the thermally induced excess pore water pressure behaviour at different stress conditions is explained using the unloading–reloading hysteresis of the typical soil consolidation curve. The results of this study provide additional data that can enhance the understanding of the thermo-mechanical behaviour concepts of saturated clays.