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A study of the loess collapsibility test and evaluation methods under complex stress conditions
Author(s): 
Pages: 25-29
Year: Issue:  9
Journal: Geotechnical Investigation & Surveying

Keyword:  三轴试验 湿陷性黄土 自重湿陷系数 湿陷性评价;
Abstract: 为使黄土的湿陷性评价方法更加准确合理,利用改装的应力控制式三轴仪和单向压缩固结仪分别测出三轴试验条件下和单向侧限条件下黄土的自重湿陷系数,并结合湿陷性黄土原位浸水试验的分层沉降数据,研究了不同试验条件下黄土的自重湿陷变形规律及评价方法。研究结果表明:三轴应力条件下黄土的自重湿陷系数曲线拟合的公式可用于计算兰州地区湿陷性黄土的自重湿陷系数,对拟合公式的积分得出的湿陷变形和原位浸水试验分层沉降量比较接近,说明三轴试验能更准确地评价黄土的湿陷性;研究成果对该地区黄土湿陷性评价以及指导规范修订具有一定的参考价值。
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