真空预压联合低能强夯法加固吹填土地基研究

Study on vacuum preloading combined with low energy dynamic compaction method to reinforce dredger fill foundation

对吹填土形成的软弱地基,常规地基处理方法难以取得理想效果。结合泉州某吹填土地基加固工程,采用真空预压联合低能强夯的方法对吹填土地基进行处理。基于表层沉降、分层沉降和孔隙水压力等现场实测数据对联合法的地基加固效果进行评价。工程试验结果表明:经联合法处理后吹填土的物理力学性质得到显著改善,土体强度大幅提高,地基承载力能够满足工程建设要求,地基整体处理效果良好,试验结果能够为类似工程的软基处理提供指导。

For the soft foundation formed by dredger fill,the conventional foundation treatment method is hard to achieve an ideal result.Combined with a dredger fill foundation reinforcement project in Quanzhou,the method of vacuum preloading combined with low-energy dynamic compaction is used to treat the dredger fill foundation.Based on the field measured data of surface settlement,layered settlement and pore water pressure,the foundation reinforcement effect of the combined method is evaluated.The results of the engineering test show that the physical and mechanical properties of the dredger fill are significantly improved after the combined method,the strength of the soil is greatly improved,the bearing capacity of the foundation can meet the requirements of the engineering construction,and the overall treatment effect of the foundation is good.The test results can provide guidance for the soft foundation treatment of similar projects.