真空预压联合强夯法处理软土地基的效果分析

Effect Analysis on Vacuum Preloading Combined with Dynamic Compaction to Treat the Soft Foundation Excavation

对深厚软黏土地基进行有效加固一直都是岩土工程界密切关注的问题。以珠海长隆国际海洋旅游度假区地基处理工程为例,探讨了真空预压联合强夯方法在深厚软黏土地基处理中的应用。分析影响地基处理效果的几个重要因素,并对联合施工工艺进行了总结。通过对空预压和强夯的施工过程中地基的沉降观测,以及处理后对地基土体的静力触探试验,分析了联合处理后的效果。通过研究,认为真空预压联合强夯方法适合用于深厚软弱地基的处理,能够加快固结沉降的完成,缩短地基处理的工期,有着很好的社会经济效益。

How to effectively reinforce the deep soft soil foundation excavation is one of the most attractive geotechnical engineering problems. In this paper,the application of vacuum preloading combined with dynamic compaction in soft ground treatment was investigated by the foundation excavation treatment of Zhuhai Changlong International Ocean Resort engineering. Several important factors of this combined method were explored based on experiments,and the construction process was summarized. In addition,results of this foundation excavation improvement method were analyzed by filed monitoring of settlement and static cone penetration tests. This study found that the vacuum preloading combined with dynamic compaction method has a very good performance in deep soft soil foundation excavation treatment. It can be capable of accelerating the settlement and shortening the construction time,which could bring good social and economic benefits.