固结排水及常含水量条件下非饱和红土强度及变形特性影响.pdfVIP

Vol. 38 No.2 第38 卷第2 期 南昌大学学报(工科版) 2016 年6 月 Journal of Nanchang University( Engineering Technology) Jun.2016 文章编号:1α)6 -0456(2016)02 -0131 -俑 固结排水及常含水量条件下非饱和 红土强度及变形特性影晌 刘星志，周龙，涂晗，刘小文 (南昌大学建筑工程学院，江西南昌 33∞31) 摘要:以江西非饱和红土为研究对象，分别进行了相同压实度下24 个试样的非饱和红土固结排水和常含水量 GDS 三轴试验，对比分析了2 种试验方法下试样的应力变形及强度变化特性。结果表明:圄结排水三轴试验与常 含水量三轴试验在高围压同基质吸力下有不同的应力应变关系，而在低围压下却大致相同;在常含水量三轴试验 中产生了剪胀现象，而在国结排水试验中并未出现此情况;常含水量三轴试验中与基质吸力有关角度φb 总体均小 于固结排水试验中的旷。为红土填筑工程、变形及稳定性分析提供试验选择参考。 关键词:非饱和红土jGDS 三轴试验;变形;强度 中固分类号:TU411 文献标志码:A Study on the inf1uence of the strength and deformation characteristics of unsaturated clay under the condition of consolidated drainage and constant water content UU Xingzhi ,ZHOU Long ,TU Han ,LIU Xiaowen (Sch∞1 of Civil Engineering and Architecture ,Nanchang University ,Nanchang 33∞31 ， China) Abstract: By using 出e aim of unsaturated red clay of Jiangxi Province. GDS triaxial tests of unsaturated clay consolidated drained and constant water content of 24 samples were carried out wi由由e same degree of compaction. 咀le stress deformation and 由e strength of 出e specimen under the two test methods were compared and analyzed. The results showed 出at the stress-strain relationships were different of consolidated drained triaxial tests and the constant water content triaxial tests under high confining pressure and the s创ne matrix suction ,while 由ey were s创ne under low confining pressure. In也e constant water content triaxial tests ,the phenomenon of shear dilation w嗣 pro­ duced ,which w嗣 not found in the c