高速公路软基地段高填方路基施工技术分析

Analysis on Construction Technology of High Fill Subgrade in Soft Base Section of Expressway

软土路基抗剪度低、压缩比高、含水量大、结构疏松,如果不经合理处理会直接影响路基的荷栽能力及自身的稳固性,直接影响公路的使用寿命高速公路软基地段的施工也体现出填筑高度大、填筑面积尺寸大的特点,高填方路基施工不仅工作量大、工期长,而且填方量较大,路基填筑完成后至少1a才能保证稳定沉降,为保证高填方路基施工质量,填筑施工过程中必须考虑可能出现的沉降量,因此,论文主要针对高速公路软基地段高填方路基的处理机理和技术流程及其高填方施工技术进行了探讨。

Soft soil subgrade has low shear resistance,high compression ratio,large water content and loose structure.lfit is not properly treated,it will directly afet the load capacity and stability of the subgrade,and directly afect the service life of the highway.The construction of expressway soft foundation section also relects the characteristics of high fling height and large fling area.The constuction of high fill subgrade is not only has the heavy workload,long construction period,but also has the large armount of flling.The stable settlement can be ensured at leust one year after the completion of subgrade flling.In order to ensure the construction quality of high fill subgnde,the possible settlement must be considered in the flling construction process.This paper discusses the treatment mechanism,technical process and construction technology ofhigh 6i1 subgrade in soft foundation sectinof xrssway.