【摘要】 在夯实水泥土桩复合地基设计中,桩土应力比n、桩体应力集中系数μp、桩间土应力减小系数μs是非常重要的设计参数。本研究基于不同桩长的单桩及四桩复合地基,不同面积置换率的九桩复合地基现场载荷试验,通过测试元件量测复合地基的桩顶反力、地基土反力。分析了夯实水泥土桩复合地基的n、μs、μp的变化规律,并给出承载力特征值时n、μs、μp的取值范围及其影响因素。更多还原

【Abstract】 The pile-soil stress ratio n,the coefficient of stress concentration of pile body and the coefficient of stress reduction of the soil between piles are the key parameters in the design of the composition foundation with rammed soil-cement piles.Based on the in-situ loading tests of the composite foundation for single pile and four piles with different length and the composite foundation for the nine piles with different displacement ratio,the reaction of pile tip and the soil contact pressure between piles are measured by the installed special gauges.The variation laws of the parameters n,μ_s and μ_p for the foundation are analyzed,and the ranges of the parameters n,μ_s and μ_p for bearing capacity are suggested.更多还原