真空降水-低能强夯联合加固粉土地基的研究  

Study on Silt Foundation Reinforced by Vacuum Dewatering Combined with Low Energy Dynamic Compaction

作　　者：王红红[1] 刘相宜[1] 宋修广[1] 

机构地区：[1]山东大学土建与水利学院,济南250061

出　　处：《路基工程》2010年第5期32-35,共4页Subgrade Engineering

基　　金：山东省自然科学基金(Y2007F35)

摘　　要：强夯法已在众多工程领域中得到广泛应用,但在处理黄泛区的粉土地基时,由于地下水位较高,存在易液化、固结慢等缺点,效果不理想。文中结合工程实例,提出真空降水-低能强夯联合加固技术,并采用动力有限元程序ABAQUAS/Explicit建立了三维计算模型,进行了动力固结数值模拟,得到了不同处理技术的孔隙水压力消散和变形规律,揭示了其加固机理。研究表明,该技术可加快超孔隙水压力消散速度,提高加固效果,有效减少差异沉降变形。Dynamic compaction has been widely applied in many engineering fields,but it has defects such as easy liquefaction and slow consolidation when dealing with silt foundation in flood areas due to higher underground water level,receiving unsatisfactory effect.Combined with engineering practice,this paper puts forward joint reinforcement technology of vacuum dewater combined with low energy dynamic compaction.It establishes 3D calculation model using dynamic finite element program ABAQUAS/Explicit for numerical simulation of dynamic consolidation.As a result,pore water pressure dissipation and deformation rules are obtained with different treatment technologies to show the reinforcement mechanism of dynamic compaction.It is indicated that this technology can accelerate excess pore water pressure dissipation rate,improve reinforcement effect and effectively reduce differential settlement and deformation.

关 键 词：粉土地基 真空降水-低能强夯 联合加固机理 应用效果 数值模拟 

分 类 号：TU472.31[建筑科学—结构工程]