青海东部盐渍土颗粒级配对毛细水上升影响的研究  

Effects of particle size distribution on capillary water upward movement in saline soil of Eastern Qinghai area

作　　者：魏凯[1] 张文[1] 刘昕[1] 任秀玲[1] 李生伟[1] 温昱[1] 

机构地区：[1]青海大学,青藏高原北缘新生代资源环境重点实验室,青海西宁810016

出　　处：《青海大学学报（自然科学版）》2016年第3期1-8,共8页Journal of Qinghai University(Natural Science)

基　　金：国家自然科学基金项目(51468055);青海省级重点实验室建设项目(2012-Z-Y14);青海省自然科学基金项目(2012-Z-705);青海大学中青年科研基金项目(2012QGT-5;2011-QGY-19;2014-QGY-19)

摘　　要：为研究颗粒级配对青海东部盐渍土地区毛细水上升的影响,通过室内模拟毛细水上升试验,对同一含水量盐渍土粒径分别为2-0.25,〈0.25-0.1,〈0.1-0.075 mm,以及不同颗粒级配条件下进行毛细水上升速度、高度与时间关系的研究。结果表明：在盐渍土毛细水上升开始阶段,3组土柱的上升速度都是最快的,随着时间的增加,上升速度逐渐变慢,而3组试样相比在试验开始2 h内〈0.25-0.1 mm粒组组成的土柱上升速度最快,〈0.1-0.075 mm粒组土柱最慢。不同颗粒级配条件下对盐渍土毛细水上升高度影响较大的是细颗粒的含量,细颗粒含量越大毛细水上升高度越大。The effects of particle size distribution on capillary water upward movement in saline soils of Eastern Qinghai area were investigated by exploring the relationships among rising height,velocity and time of the capillary water movement. All soil samples had same moisture content. The columns were filled with soil particle size of 2 - 0. 25, 〈0. 25 - 0. 1 and 〈0. 1 - 0. 075 mm,and with different particle gradation,respectively. The results show the capillary water rise rapidly at beginning and gradually slow down with time. Comparing the results of the three groups within first 2h, 〈0. 25 - 0. 1 mm particle rise the fastest, 〈0. 1 - 0. 075 mm particle rise the slowest. The content of fine particles affects capillary water rising height significantly in different particle size distribution of saline soil,the higher the content,the taller the rising height.

关 键 词：盐渍土 毛细水 颗粒级配 

分 类 号：P642.1[天文地球—工程地质学]