应力作用下非饱和重塑黏土土水特征曲线研究  

Experimental Study of Stress State- dependent SWCC of Remolded Unsaturated Clay

作　　者：宋亚亚 卢廷浩[2,3] 季李通 

机构地区：[1]广东天信电力工程检测有限公司,广东广州510663 [2]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [3]河海大学岩土工程研究所,江苏南京210098 [4]南京泰克奥科技有限公司,江苏南京210017

出　　处：《水利与建筑工程学报》2016年第2期185-188,192,共5页Journal of Water Resources and Architectural Engineering

摘　　要：利用最新研制的全自动非饱和土固结仪,研究了竖向应力对非饱和重塑黏土土水特征曲线的影响,并采用FX模型,通过最小二乘法对试验结果进行拟合。结果表明,竖向应力越大,试样的空气进入值越大,曲线越平缓,水越难排出,相同吸力下含水率越高。FX模型可以较好的描述本次试验各组试样的土水特征曲线。通过分析拟合参数,提出一个只与竖向应力有关的土水特征曲线经验公式。Automatic instruments of unsaturated soil consolidation were used to analyze the influences of vertical stress on SWCC of remolded unsaturated clay. Through least - square method, FX model was chosen to fit the test data. The results show that the higher the vertical stress, the flatter the curve with higher air entry value and higher water content under the same suction. Through the fit results of SWCC, it was found that FX model can reflect the ability of water-retainment of clay in this study well. Besides, An empirical formula of SWCC only related with vertical stress has been proposed.

关 键 词：非饱和土 土水特征曲线 竖向应力 经验公式 

分 类 号：TU411[建筑科学—岩土工程]