膨胀土的浸水规律

根据土体浸水速率（导水库）与土体结构的理论关系和膨胀土结构的分形模型，导出了膨胀土的浸水速率与含水量，吸力、时间和上覆荷载的相关关系。理论和试验结果表明：膨胀土的浸水速率与含水量、吸力和时间在双对数坐标上呈直线相关，随着含水量增加、吸力减小，浸水速率增大、浸水速率随时间延长而减小；浸水速率的对数与上覆荷载呈直线相关，上覆荷载越大，浸水速率越小。

Laws on Hydraulic Conductivity of Expansive Soils

Based on the theoretical relations between hydraulic conductivity and soil structure,and by use of the fractal structure model of expansive soils,the relationships between hydraulic conductivity and water content,suction,time and overpressure are presented in this paper.Theoretical and experimental results show that there are linear relationships between the logarithm of hydraulic conductivity,and decreases with the logarithm of water content,the logarithm of suction and the logarithm of time,and a linear relationship between the logarithm of hydraulic conductivity and overpressure.The hydraulic conductivity increases with the water content, and decreases with the suction of expansive soils and time.The larger the overpressure,the smaller the hydraulic conductivity.