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试验结果表明,非饱和粘土之未冻水含量、冻结温度、导水系数及扩散系数随其初始含水量而变化,并可用回归统计式子表示;冻锋面下出现脱水区;当地下水位小于100cm、冻结速率在2—4cm/d时,同一水平处之冻胀速率几乎一致;地下水埋深越浅,则冻锋面下之抽吸力变化越小,反之亦然;在地下水位相对较深、而冻结速率又较大时,由于水流不能充分补给,冻胀性降低。
The experimental results show that the unfrozen water content, freezing temperature, transmissivity and diffusion coefficient of unsaturated clay vary with its initial moisture content, and can be represented by a regression formula; dehydration zone appears below the frozen front; when the groundwater level is less than 100cm When the freezing rate is 2-4cm/d, the frost-heaving rate at the same level is almost the same; the shallower the groundwater depth, the smaller the change of suction force under the frozen front, and vice versa; and the relatively deeper groundwater level. However, when the freezing rate is large, the water swell can be reduced because the water flow cannot be sufficiently supplied.