宁夏山区黄土湿陷性研究  

Research on the Collapsibility of Loess in Mountainous Areas of Ningxia

作　　者：黄卫平 马壮 HUANG Weiping;MA Zhuang(Ningxia Transportation Construction Co.,Ltd.;Ningxia Hui Autonomous Region Road Transport Affairs Center,Yinchuan,Ningxia Hui Autonomous Region,750004 China)

机构地区：[1]宁夏交通建设股份有限公司 [2]宁夏回族自治区道路运输事务中心,宁夏银川750004

出　　处：《大众科学》2024年第15期95-97,共3页China Public Science

摘　　要：通过实地取样和实验分析,深入探讨了宁夏山区黄土的湿陷性。研究结果显示:黄土的湿陷性与含水率、干密度和饱和度密切相关。随着含水率的增加和干密度的提高,湿陷系数逐渐减小,当饱和度超过65%时,湿陷性显著减弱或消除。这些发现为宁夏山区黄土地区的工程建设提供了重要参考,有助于优化设计和施工措施,降低湿陷性带来的风险,提升工程质量与安全。Based on the topography and distribution characteristics of loess in the southern mountainous areas of Ningxia,this article relies on the ongoing construction of the Yinkun Expressway Ningxia transit section project.Four construction contract sections were selected along the route to sample loess at different sections and depths.The natural moisture content,moisture content,natural density,dry density,liquid plastic limit,soil particle specific gravity,natural porosity,saturation,and collapsibility coefficient of loess were tested.Research has shown that the physical properties of Ningxia loess show a trend of increasing water content from small to large from north to south and from west to east.In the shallow surface layer,the water content is low,and the range of variation in soil water content at different depths is not large and relatively uniform.The natural porosity ratio shows an overall downward trend with the variation of sampling depth,and there are significant hydrogeological differences among different landforms at different depths.The range of changes in the natural porosity ratio of soil in the same region is also relatively close.At the same time,research has found that as the soil saturation increases,the collapsibility coefficient gradually decreases,and when the saturation is about 65%,the collapsibility coefficient gradually decreases or naturally eliminates collapsibility.

关 键 词：宁夏 黄土 物理性质 湿陷系数 

分 类 号：U416[交通运输工程—道路与铁道工程]