论文部分内容阅读
基于8个场地中共23根现场试验桩的实测资料,对扩底桩上拔荷载-上拔位移曲线进行了优化的拟合分析。针对抗拔扩底桩的承载特性,选用了生物领域的Richards数学模型。对23根现场试验桩的拟合表明,Richards模型的拟合精度高,相关系数R为0.97311―0.99942,平均0.99188;该模型对抗拔扩底桩的拟合效果比双曲线模型的要好;基于该数学模型的扩底桩上拔荷载的计算值与实测值的误差一般为±2.104%。结果表明:该文选用的Richards数学模型针对抗拔扩底桩上拔荷载-上拔位移曲线的拟合是较为精确的和可靠的。
Based on the measured data of 23 field test piles in eight venues, the fitting analysis of the pull-out displacement-uplift curve of the expanded-bottom piles was optimized. According to the bearing characteristics of anti-drawing and expanding pile, the Richards mathematical model in biological field was chosen. The fitting of 23 experimental piles showed that the fitting precision of Richards model was high, the correlation coefficient R was 0.97311-0.99942, with an average of 0.99188. The fitting effect of this model was better than that of the hyperbola model for the bottom-piled pile. The error between the calculated value and the measured value of the pull-out load of the mathematic model is generally 2.104%. The results show that the Richards mathematical model used in this paper is more accurate and reliable for the fitting of pull-out-pull-displacement curve of pull-out pile.