中文摘要：

利用FredlundSWCC仪器控制从0～1500kPa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，得到土一水特征曲线．将所得土一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．

英文摘要：

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.