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针对低液限粉性土特殊的工程性质,进行室内毛细水试验。通过分别以压实度和初始含水量为控制条件,总结出压实度和初始含水量对毛细水上升高度的影响,定性地分析了毛细水上升迁移规律:在不同压实度条件下,毛细水上升高度总体随初始含水量的增加而减小;在最佳含水量状态下,随着压实度的增加,毛细水上升高度呈二次抛物线分布,并以此提出毛细水上升高度和压实度之间的回归公式,强调了低液限粉性土作为路基时压实度应控制在90%以上,尽可能增加压实含水量,一般宜大于最佳含水量。
Aiming at the special engineering properties of low liquid limit silt soil, indoor capillary water test is carried out. The compaction degree and initial water content were used as control conditions respectively to summarize the influence of compaction degree and initial water content on the capillary water rise. The law of ascending and descending of capillary water was qualitatively analyzed. Under different compaction conditions, The water ascending height decreased with the increase of initial water content. Under the optimal water content, the ascending height of capillary water showed a quadratic parabola distribution with the compaction degree increasing, The regression formula between realities emphasizes that the compaction degree of low liquid limit silt soil should be controlled above 90% as subgrade, and the compaction water content should be increased as much as possible, generally it should be greater than the optimal water content.