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非饱和土土-水特征曲线试验及在工程中的应用

Keywords: 土水特征曲线,非饱和土,数值模拟,地面沉降

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Abstract:

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-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.

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