考虑土体初始应力下的散体桩承载力研究

基于Vesic柱孔扩张理论，推导出考虑土体在初始应力状态下的散体桩单桩极限承载力的计算公式，并分析了散体桩挤土塑性区半径的主要影响因素．同时结合工程实例，比较分析了现场试验与理论计算的桩承载力结果，结果表明，考虑土体初始应力状态下的散体桩极限承载力的计算结果与实际相比误差较小，可在实际工程中参考应用．

Granular Pile Ultimate Bearing Capacity under Consideration of Soil Initial Stress

Based on the Vesic cylindrical cavity expansion theory, granular pile ultimate bearing capacity calculation formula under the consideration of the soil initial state stress was derived, and the main influence factors of the granular pile soil compaction plastic zone radius were analyzed. Combined with the engineering example, the field test and theoretical calculation results were compared. The results indicated that the error of granular pile ultimate bearing capacity under the consideration of initial stress is smaller than that of the actual, which can be used for practical engineering.