长春地区季冻土基本性质对水分迁移的影响

以长春-四平线（一号样）、长春-松原线（二号样）以及长春-吉林北线（三号样）3段公路土样为研究对象，从微观结构出发，结合物理化学试验和力学试验，评价了长春地区季冻土的性质对水分迁移的影响，为长春地区季冻土的水分迁移研究、道路冻胀翻浆的防治等提供试验依据。从试验得出，长春地区季节冻土孔隙直径大部分分布在<5 μm区间，有利于水分迁移；土样矿物质含量较高，阳离子交换量比较大，粘粒含量较高，颗粒形状也较规则，水化比表面积较高，有利于水化膜形成;外载荷会对水分迁移程度产生影响,整体上三号样水分迁移量最大，一号样次之，二号样最小。

Influence of Basic Properties of Seasonally Frozen Soil on Moisture Movement in Changchun Area

Samples from Changchun-Siping highway, Changchun-Songyuan highway and North Changchun-Jilin highway were studied.Studied from microstructure of frozen soil, combining physicochemical tests and mechanical tests, the influence of properties of seasonally frozen soil in Changchun area on moisture movement is evaluated，which provides the experimental evidence for study of moisture movement of seasonally frozen soil and the road frost heaving and mudding in Changchun area. It is concluded from the experiments that the diameter of pore of seasonally frozen soil in Changchun area is mostly less than 5 μm, which is benefit for the migration of gravitational and capillary water. With high content of mineral substance, large cation exchange capacity, rich clay content, regular particle shape and great hydration specific surface area, it is benefit for the formation of hydration membranes. The external loads influence the moisture movement.And sample 3 has the largest quantity of moisture movement, then sample 1,and sample 2 the lest.