黄土地基水分入渗分析及增湿变形计算

黄土地基因渗漏水导致局部地基增湿从而引起的工程事故时有发生，但目前对渗水增湿过程及增湿变形尚难预测．首先对渗水量已知情况下的黄土地基渗水增湿过程进行理论分析，建立了二维湿陷性黄土地基线源入渗增湿计算模型，该模型揭示出黄土地基非饱和增湿过程，这与实际是相符的．入渗增湿计算得到黄土地基含水量变化后，进一步根据含水量确定模量，采用分层总和法计算黄土地基增湿前后的沉降量，前后的沉降量之差即为增湿变形，并经实例计算验证了该入渗增湿计算模型及增湿变形计算方法的合理性．

Calculation method for seepage flow and water-increased deformation in loess foundation with certain infiltration capacity

Project accidents occur in the loess foundation with the resulting in the water-increased deformation owing to water leak. But it is still difficult to predict moisture content change and water-increased deformation in the loess foundation resulted from water seepage. This paper first theoretically analyzes the moisture content change in loess foundation under certain infiltration capacity, then a two-dimensional water seepage calculation model for loess foundation is established, which discovers unsaturated water-increased phenomenon and which alse consists with the field situation. As the water content change in loess foundation is derived, the soil modulus of compressibility can be obtained according to the water content. Further more, layer-wise summation method is used to calculate the setting of ground, the difference of the setting before and after water seepage gives water-increased settlement of loess foundation. Finally, the water seepage model and water-increased deformation calculation method are verified by comparing the calculated data to that of the test.