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Character of undisturbed unsaturated expensive soil under plane-strain test
Author(s): 
Pages: 117-120
Year: Issue:  6
Journal: ENGINEERING JOURNAL OF WUHAN UNIVERSITY

Keyword:  原状膨胀土吸力平面应变试验轴平移技术;
Abstract: 介绍了非饱和土孔隙压力的测试技术和轴平移技术,利用改装的土工真三轴仪,模拟膨胀土边坡开挖过程的应力状态,对河南南阳原状膨胀土进行了平面应变等应力比卸荷试验,试验中同时测定了土中孔隙压力值,分析了膨胀土中吸力在剪切过程中的变化. 试验表明,非饱和土原状膨胀土的吸力状态不仅与土的应力状态有关,还与土体的变形有关,其稳定表现出明显的滞后现象. 土体吸力不仅取决于σ1、σ3,还与土中偏应力状态(σ1-σ3)有关.
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