湿陷性黄土路基施工技术研究  

Research on Construction Technology of Collapsible Loess Roadbed

作　　者：张国锋 Zhang Guofeng(Henan Zhongzhou Road and Bridge Construction Co.,LTD.,Zhoukou 466000,China)

机构地区：[1]河南中州路桥建设有限公司,河南周口466000

出　　处：《黑龙江科学》2024年第18期161-164,共4页Heilongjiang Science

摘　　要：为研究解决湿陷性黄土路基承载力弱、施工难等问题,采取工程实践+理论方法,针对湿陷性黄土路基施工技术展开研究,根据案例项目现场湿陷性黄土特点,提出采用灰土挤密桩法对湿陷性黄土路基进行处理。现场监测结果显示,灰土挤密桩法工后最大沉降值为2 mm,出现在第6个月,最大累计沉降值为6.3 mm,出现在第9个月,工后路基的干重度、孔隙比、压缩系数、压缩模量及湿陷性系数等均有显著改善,不仅有效提高了湿陷性黄土路基的承载力及稳定性,且处理深度较大(可达10 m以上),成本造价相对较低,在湿陷性黄土路基中有着良好的应用价值。In order to solve the problems,such as weak bearing capacity and difficult construction of collapsible loess subgrade,the study adopts the method of engineering practice and theory to study the construction technology of collapsible loess subgrade.Based on the characteristics of collapsible loess on the site of the case project,the study proposes to treat the collapsible loess subgrade with lime soil compaction pile method.Results of site monitoring show that the maximum settlement value of lime soil compaction pile after construction is 2 mm in the 6th month,and the maximum cumulative settlement value is 6.3 mm in the 9th month.The dry weight,porosity ratio,compression coefficient,compression modulus and collapsibility coefficient of the roadbed after construction have been significantly improved,which not only effectively improves the bearing capacity and stability of the collapsible loess roadbed,but also has a relatively large treatment depth(up to 10 m)and relatively low cost,which has good application value in the collapsible loess roadbed.

关 键 词：湿陷性黄土 路基 灰土挤密桩 承载力 

分 类 号：U416.1[交通运输工程—道路与铁道工程]