豫东黄泛区粉砂土毛细水上升研究  

Research of Silty Soil Capillary Water Rising in Yellow River Flooded Area of Eastern Henan

作　　者：袁玉卿[1] 李伟[2] 赵丽敏[1] 

机构地区：[1]河南大学土木建筑学院,河南开封475004 [2]北京市勘察设计研究院有限公司,北京100038

出　　处：《公路交通科技》2016年第2期33-38,共6页Journal of Highway and Transportation Research and Development

基　　金：河南省教育厅自然科学研究计划项目(2011A580001);河南省交通运输厅科技项目(2010PII10)

摘　　要：为研究毛细水的上升规律及控制技术,取豫东黄泛区粉砂土,针对压实度94%,96%,98%的土样,进行了数值模拟和室内试验,拟合得到了毛细水上升与时间的关系式。结果表明,随时间的延长毛细水上升高度逐渐稳定,第10天时上升高度达130 cm左右,最终上升高度可达285 cm;毛细水上升速度与压实度呈反比,压实度98%时毛细水上升高度和速度均最小;级配碎石、水泥稳定土、纤维水泥稳定土能有效阻隔毛细水上升。因此,适当提高路基压实度和增加毛细水阻隔层可以有效控制毛细水上升,改善路基的水稳定性能。To study the law of capillary water rising and control techniques,using the silty soil from the Yellow River flooded area of eastern Henan,the numerical simulations and the laboratory tests on the soil samples with compaction degrees of 94%,96% and 98%,are carried out. By fitting,the relation formulas between capillary water rising height and time are obtained. The result shows that（ 1） the rising height is gradually stable with time going on,about 130 cm on the 10 th days,and ultimately arrived at its maximum285 cm at the last;（ 2） the rising speed of capillary water is inversely proportional to the degree of compaction,especially reaching the minimum rising height and speed with the compaction degree of 98%;（ 3） the graded crushed stone,cement stabilized soil and fiber cement stabilized soil can effectively cut off the rising of capillary water. Thus,properly increasing the compaction degree of subgrade and adding the blocking layer of capillary water can effectively prevent the capillary water from rising,which will improve the water stability of subgrade.

关 键 词：道路工程 路基材料 毛细水上升试验 粉砂土 数值模拟 阻隔 黄泛区 

分 类 号：U416.1[交通运输工程—道路与铁道工程]