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针对某重塑黏土,通过常规固结仪,研究了恒压下初始孔隙比、应力及初始饱和度对湿化变形的影响。试验结果显示,应力和初始孔隙比e对湿化变形影响明显,低应力下,变形随e的提高逐渐由膨胀变为压缩;高应力下,试样均发生压缩,压缩量随e的增大而增大;定量分析了湿化变形与应力和e之间的关系。试样湿化稳定时间t_0受应力和初始孔隙比e影响明显,t0随应力的增加而增大;低应力下,t_0随e的增加而增大,高应力下,t_0随e的增加先增大后减小。初始饱和度Sr对湿化变形也有较大影响,低压应力下,试样膨胀量随着Sr的增加先减小后增大,可能存在/最优初始饱和度0,使得变形量最小;高压应力下,试样压缩量随Sr的增加而减小,二者可近似用直线拟合。
Aiming at some remolded clay, the effects of initial void ratio, stress and initial saturation on wet deformation were investigated by conventional consolidation. The results show that the stress and the initial void ratio e have obvious effects on the wetting deformation. Under low stress, the deformation gradually changes from expansion to compression with the increase of e; the compression takes place under high stress, and the amount of compression increases with e And increases; quantitative analysis of the relationship between wetting deformation and stress and e. The sample wetting stabilization time t_0 is significantly affected by stress and initial void ratio e, and t0 increases with increasing stress; under low stress, t_0 increases with increasing e, under high stress, t_0 increases first with increasing e After the big reduction. The initial saturation Sr also has a great influence on the wetting deformation. Under the low pressure stress, the expansion of the sample first decreases and then increases with the increase of Sr, and there may be the optimal initial saturation of 0, , The amount of sample compression decreases with the increase of Sr, the two can be approximated by straight line fitting.