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中文摘要：
在土石坝工程中,粗粒土料湿化变形是重要的但尚未很好解决的问题之一.利用改进的仪器,对某坝的粗粒土料进行了不同围压和湿化应力水平下保持应力水平不变的三轴湿化变形试验,研究了湿化变形量及湿化前后的应力-应变体变关系.试验结果表明,粗粒土料湿化变形随固结压力和湿化应力水平而变;随着湿化应力水平的增加湿化体变-轴变比逐渐减小;湿化后土体再加载时表现出先弹性后弹塑性的性状;与双线法相比,单线法得到的湿化变形更合理.同时根据试验结果,建议了计算湿化变形的改进的双线法,提出了最大湿化应力水平的概念,并利用该概念对试验结果进行了剖析,这些结论对湿化变形的进一步研究具有一定的参考价值.
英文摘要：
Wetting deformation of coarse grained soil is an important problem in earth dam design; but it is not solved well so far. The wetting deformation tests under various stress levels are carried out on a coarse grained soil; and the wetting deformations and curves of stress-axial strain-volume strain are obtained. The test results and analyses indicate that; the wetting deformation of the coarse grained soil is varied with cell pressure and wetting stress level; the ratio of wetting volume strain versus wetting axial strain is decreasing with the wetting stress level increasing; the wetted sample behaviour may be elacstic first elastoplastic after, while new load is forced on the sample; the method of single line for calculating wetting deformation is better than double lines. At the same time, a new method of improved double lines for calculating wetting deformation is proposed; the maximum wetting stress level is defined and used to explain the test results. The results may be significant to farther research on wetting deformation.
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同项目期刊论文
Develoment technology of rigidity-drain ile and numerical analysis of its anti-liquefaction characte
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