层状构造土体中毛细水上升的试验研究  

Experimental Study on the Rise of Capillary Water in Layered Soil

作　　者：王中翰 柴金义[1] 张宏[1] WANG Zhonghan;CHAI Jinyi;ZHANG Hong(Institute of Transportation,Inner Mongolia University,Hohhot 010070,China)

机构地区：[1]内蒙古大学交通学院,呼和浩特010070

出　　处：《内蒙古大学学报（自然科学版）》2021年第2期192-197,共6页Journal of Inner Mongolia University：Natural Science Edition

基　　金：内蒙古自然科学基金项目(2015MS0523);国家自然科学基金项目(5196080076)。

摘　　要：针对河套灌区设置风积砂隔断层路基的层状构造,通过室内土柱试验,模拟研究有地下水位条件下换填路基毛细水上升规律。结果表明,粉土柱下部(0~80cm)和风积砂柱下部(0~40cm)含水率呈现接近饱和状态,与上部土体含水率逐渐降低的分布性质迥异。即毛细水在土体中的分布存在明显的分区。在不同的区域风积砂层对毛细水上升的影响有很大区别:位于饱和区的砂层会加速毛细水的上升,且会抬高毛细饱和区,进而提高毛细水位高度;位于非饱和区砂层可有效延缓毛细水的上升,降低毛细补水效率,进而降低毛细水位高度。A laboratory investigation was conducted for capillary water movement from sand layered soil columns in the presence of a water table.The results show that the water content in the lower parts of the silt column(0-80 cm) and aeolian sand column(0-40 cm) is nearly saturated to indicate quite different from the distribution of the water content of the upper soil.There is a clear division of the distribution of capillary water in the soil, and the effect of aeolian sand layers on capillary water rise is very different in different regions: sand layers in the saturated zone will accelerate the rise of capillary water and lift a high capillary saturation zone, and then increase the capillary height;sand layer in the unsaturated zone can effectively delay the rise of capillary water, reducing the capillary water replenishment efficiency and the capillary height.

关 键 词：层状土 路基材料 土层构造 含水率 毛细水上升高度 

分 类 号：U416.166[交通运输工程—道路与铁道工程]