湿陷性黄土地层市政道路改扩建路基差异沉降现场试验研究

Field Experimental Study on Differential Settlement of Municipal Road Reconstruction and Expansion Subgrade in Collapsible Loess Stratum

依托朔州市南环路道路改扩建工程,采用现场试验分析方法,对湿陷性黄土地层市政道路改扩建路基差异沉降变形规律开展了研究。结果表明,在路基土整体填筑完成前,最主要的部分是地基压缩变形,路基土填筑完成后的地基沉降仍在增加,但速率变缓,且主要是地基固结沉降,为改扩建工程设计施工方案选择提供了科学依据。

Relying on the Shuozhou South Ring Road Reconstruction and Expansion Project,the field experimental analysis method is used to study the law of differential settlement deformation of the municipal road reconstruction and expansion subgrade in the collapsible loess stratum.The result shows that before the whole subgrade soil filling is completed,the most important part is the foundation compression deformation.The foundation settlement still increases after the completion of subgrade soil filling,but the velocity slows down and it is mainly the subgrade consolidation settlement,which can provide a scientific basis for the selection of design and construction schemes of the reconstruction and expansion projects.