软土地基泡沫轻质土路基变形性状分析

摘要

As the subgrade placed by foamed lightweight soil is of integral structure,with small settlement of foundation under the action of such subgrade,the lightweight soil subgrade should have the adaptability to uneven settlement of foundation to a greater extent.Taking part of subgrade filled by foamed cement banking in a test portion of the first section of Jiangmen Section of Guangdong—Foshan—Jiangmen Fast Track as the example,the stress,strain at the subgrade base during the placement and the layered settlement rules of the subgrade were analyzed on the basis of the data from field monitoring;then the laws how the embankment load of foamed lightweight soil on soft soil foundation was distributed and transferred,were discussed.%由于泡沫轻质土浇筑的路基属于整体性结构,加之轻质土路基作用下地基的沉降量小,因此轻质土路基对地基不均匀沉降应有更大的适应性.以广佛江快速通道江门段一标段的试验工程采用气泡混合轻质土换填部分路基为例,根据现场监测数据对气泡混合轻质土在深厚软土路基浇筑过程中的路基基底应力、应变和路基分层沉降规律进行分析,并讨论了软土地基泡沫轻质土路基荷载的分布和传递规律.