使用非饱和土三轴试验仪，对击实非饱和粉土进行吸力控制的三轴排气排水剪切试验，得到不同试验条件下剪切时的应力应变关系和吸排水情况.首先，通过改变试样的初始密度，得到不同孔隙比条件下的三轴剪切试验结果，确定非饱和试样发生剪切膨胀和剪切体缩的临界孔隙比约为1.0；其次，通过改变施加吸力的大小，获得不同吸力条件下剪切时的应力应变关系和吸排水情况，并确定试样的临界吸排水吸力值为25～35 kPa；最后，通过改变净围压大小，得到不同净围压情况下的应力应变关系和吸排水情况，其中在剪切过程中不同净围压下的含水量变化大致相同.
SUN De-an, YANG Xian-cai
. Experimental Study on Hydro-Mechanical Behavior of Unsaturated Silt[J]. Journal of Shanghai University, 2012
, 18(6)
: 627
-633
.
DOI: 10.3969/j.issn.1007-2861.2012.06.015
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