低围压水平下砂的排水行为(英文)Drained Behavior of Sand Under Low Confining Pressure
杨少丽,冯秀丽,林霖,Rolf Sandven
摘要(Abstract)：
采用干样沉降法制备样品 ,选用静三轴仪对松砂和密砂样在 10 k Pa至 10 0 k Pa的低围压下的排水行为进行了实验研究 ,并对实验结果作了橡皮膜校正 ,在围压为 10 k Pa的密砂实验中 ,轴向应力的校正值可达到 12 %。实验研究表明低围压下松砂的剪胀性非常明显 ,且存在剪应力极值 ;围压越低 ,松砂和密砂的剪应力极值越小 ,达到最大剪应力所对应的剪应变越小。同时还表明低围压范围内相对密度不同 ,砂的应力应变特性不同 ;此外 ,低围压下砂的内摩擦角高于高围压下的值 ,从而在工程上应重视低围压水平下砂土工程参数的合理选取
关键词(KeyWords)： 砂;低围压;剪胀性;橡皮膜效应;内摩擦角
基金项目(Foundation): 欧共体科研与发展项目!MA ST3- (T97- 0 0 97);; 国家自然科学基金课题!(5 0 0 0 90 0 2 )资助&&
作者(Author): 杨少丽,冯秀丽,林霖,Rolf Sandven
DOI: 10.16441/j.cnki.hdxb.2001.03.025
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