【摘要】 <正> 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。更多还原

【Abstract】 Experimental results show that unfreezing water content, freezing point, hydro-conductivity and diffusivity of clay vary with its original water content and can be expressed by empirical formulas. There is a dehydration process in the zone below frost fringe. Under the condition with the ground-water table of less than 100 cm and the frost penetration rate from 2 to 4 cm/day, the frost heave rate of clay at a given level is constant. The shallower the water level is, the less the changes of suction force below frost front and the stronger the frost heave are. Under relative deeper ground-water table and greater penetration rate, the frost heave decreases because water supply is not sufficiently.更多还原