吹填软基无砂垫层真空预压快速加固新技术及现场试验研究

A New Quick Treatment Technology of Muck Filled Shallow Foundation by Vacuum Preloading Method without Sand Cushion and Its In-situ Test

基于传统真空预压技术,提出采用无砂垫层真空预压法对吹填软地基进行浅层加固,通过现场试验优化施工工艺,分析了真空预压下新近吹填淤泥地基的地表沉降和孔隙水压力,并对比了加固前后土体物理力学指标和地基承载力。结果表明,该方法可快速加固吹填淤泥层,并满足后续工程施工承载要求。

Based on the traditional vacuum preloading process,a new vacuum preloading method without sand cushion is proposed to reinforce the shallow foundation of fresh hydraulic fill mud.The construction processes are optimized by in-situ test.The transmission of vacuum pressure,surface settlement and pore pressure dissipation are analyzed.Comparison of the physical and mechanical parameters and the bearing capacity of the reinforced foundation,the results show that the vacuum preloading method without sand cushion can reinforce the hydraulic filling mud layer quickly,which meets the capacity requirement of the following construction.