氯盐盐渍土路基中毛细水上升规律试验研究

Experimental Study of Controlling Capillary Water Rise in Saline Soil

盐渍土路基工程中,其毛细水上升高度与发生盐渍化病害关系密切.笔者通过对不同含盐量、不同上覆荷载、不同材料改性以及设置级配碎石的盐渍土进行毛细水上升高度试验,研究不同因素对盐渍土毛细水上升的影响及其变化规律.研究结果表明:含盐量越高毛细水上升高度越低;上覆荷载影响毛细水上升速度与高度,上覆荷载越大其上升速度越慢且上升高度越低;改性材料能够改善盐渍土中的毛细水上升情况,水泥改性剂具有较好地抑制毛细水上升的能力;设置级配碎石垫层能很好地抑制毛细水上升高度.

In saline soil roadbed engineering,the rise of capillary water is closely related to the occurrence of saline diseases.In this paper,capillary water elevation tests have been carried out on saline soils with different salt content,different overlying loads,different material modification and graded gravel to study the influence of different factors on capillary water elevation of saline soils and its variation law.The results show that the higher the salt content is,the lower the capillary water rising height is formed;the higher the overlying load is,the slower the capillary water rising speed and the lower the rising height are formed;the modified material can improve the capillary water rising situation in saline soil;the cement modifier has better ability to restrain the capillary water rising;the Graded Macadam cushion can be set up well.Suppression of capillary rise height is formed.