非饱和重塑土固结变形影响因素试验研究

Experimental Research on the Influence Factors of Unsaturated Remolded Soil Consolidation

本文通过设计的一系列单向固结试验,分析了荷载、排水条件等因素对非饱和重塑土固结变形的影响。结果表明,随着荷载的增加,土样固结所需要的时间增加;相同荷载下,不能排水的土样固结变形明显小于可以自由排水的土样。土样质量达到稳定的时间要长于土样固结的时间,一定阶段后,土样水分已经很少,土壤基质吸力不再起主导作用,水分的散失不再影响土壤的固结变形,土壤的形变已经达到稳定。不同荷载下土样的相对质量都稳定在约1.041左右,土样质量的最终稳定值并不是取决于所加的荷载,而是由土样内部的性质决定的。不同荷载下非饱和土样的饱和度值都稳定在约18.86%左右。非饱和土样孔隙水的散失受环境温度的影响较大,而受荷载的影响较小。本试验为研究非饱和重塑土固结稳定影响因素提供了一种方法。

In this study, by using a series of designed one-way consolidation test, the influence of load and drainagecondition on unsaturated remolded soil consolidation deformation was analyzed. The results indicated that as the load raised,the time of consolidation increased and under the same load condition, the consolidation deformation of soil sample whichcannot drain were smaller than that which can drain freely. It showed that the time of unsaturated soil mass reaching stablewas longer than that of unsaturated soil consolidation deformation reaching stable. After a certain stage, the soil water wasfewer and the soil suction did not play a leading role any more. The loss of the soil water would not influence theconsolidation deformation any longer and the deformation had reached stable. The soil relative mass under different loadstabilized at about 1.041. The final stable value of the soil mass did not depend on the load but the soil inner properties. Thedegree of saturation under different load stabilized at about 18.86%. The loss of pore water was influenced significantly bythe environmental temperature and insignificantly by the load. This test provides a meaningful suggestion for the analysis ofunsaturated remolded soil consolidation deformation.