非饱和土土-水特征曲线试验及在工程中的应用  

SWCC Test of Unsaturated Soil and Its Applications in Engineering

作　　者：张钦喜[1] 陈鹏[1] 杨宇友[1] 李聪[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《北京工业大学学报》2012年第8期1185-1189,共5页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(50678003)

摘　　要：利用Fredlund SWCC仪器控制从0～1 500 kPa的吸力,并测得相应吸力的含水量,再用MATLAB软件对试验结果进行拟合,得到土-水特征曲线.将所得土-水特征曲线应用到数值模拟软件中得到考虑地下水作用时的地表沉降曲线,以Peck公式计算得到的地表沉降曲线为参考,并将此曲线与不考虑地下水作用的数值模拟所得到的地表沉降曲线进行对比,其结果与工程实测曲线吻合较好,验证了应用本文提出的计算方法的可靠性和适用性.Fredlund SWCC device can apply matric suctions from zero up to 1 500 kPa. After measuring the water contents of the corresponding suction and fitting the data with MATLAB, the soil-water characteristic curve （SWCC） is obtained. Applying the SWCC in numerical simulation software, the settlement curve of ground surface is obtained considering groundwater. When groundwater is not considered, another settlement curve of ground surface is obtioned by numerical simulation. Contrasting the two curves with the settlement curve of Peck formula for reference, the settlement curve of ground surface considering groundwater is closer to the measured curve. Therefore, the reliability and applicability of this method are verified.

关 键 词：土水特征曲线 非饱和土 数值模拟 地面沉降 

分 类 号：TU433[建筑科学—岩土工程]