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阐述了毛管水对土体强度、变形和渗流的影响。粉性土既有较高的毛管水头,又有一定的渗透性,水压传递快;毛管水对此类土的地基、基坑和堤坝等工程有明显的影响。研究的主要成果有:①根据试样浸水与否的无侧限抗压强度比较试验及理论分析,证明毛管水张力增高了土体强度,强度增高的数值,试验结果和理论分析相符;②计算分析雨季粉性土地表层毛管水张力消失和土体膨胀的过程;③借砂模试验和电拟试验,分析了毛管水对堤坝渗流流态的影响,毛管水增高了渗流量和出逸点高度;④提出了砂土和粉性土毛管水头hc和渗透系数k新的经验计算式。研究成果可应用于粉性土地基、基坑和堤坝等工程。
The influence of capillary water on soil strength, deformation and seepage is expounded. The silt soil has high capillary head, permeability and fast water pressure transmission. The capillary water has obvious influence on foundation, foundation pit and dam of such soil. The main results are as follows: ①According to the unconfined compressive strength comparison test and theoretical analysis of the specimen immersed in water, it is proved that the capillary water tension increases the value of soil strength and strength, the experimental results are consistent with the theoretical analysis; ②The calculation (3) The influence of capillary water on seepage flow of embankment was analyzed by means of sand model test and electric simulation test. The capillary water increased the seepage volume and the height of exit point ; ④ put forward the new experience formula of sand head and powder earth capillary head hc and permeability coefficient k. The research results can be applied to the project of foundation soil, foundation pit and embankment.