If the infiltration intensity is less then the saturated permeability coefficient, the surface soil finally reaches to an unsaturated infiltration stage instead of saturated infiltration stage.

当降雨强度小于土体的饱和渗透系数时，表层土体达不到饱和状态，最终的稳定入渗只能达到一个非饱和入渗状态。

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The analysis results also show that foundation pit tends to fail in anisotropic soil when horizontal permeability coefficient is larger than that of vertical.

对比各种分析结果，当水平向渗透系数大于竖向渗透系数时，基坑最容易发生渗透破坏。

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Four kinds of amendments can improve soil physical properties. Soil bulk density decreased, soil porosity, permeability coefficient and field capacity increased under treatments.

四种改良剂均能不同程度的改善土壤物理性状，能降低土壤容重，提高土壤总孔隙度，加快渗透速度，增加田间持水量。

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