郑州单桩静载曲线不同模型下拟合的对比分析

Comparative Analysis of the Fitting Curves for Single Pile Static Load under Different Models in Zhengzhou

基于郑州地区单桩静荷载测试曲线Q-s的特点,引入双曲线模型(普通双曲线模型、修正双曲线模型)、完整指数曲线模型与生长曲线模型(MMF模型、Gompertz模型),采用粒子群算法分别获得各模型的拟合方程式,并对拟合情况进行对比分析.结果表明,对于郑州地区不同类型的单桩静载荷试验数据,MMF模型的拟合效果明显优于普通双曲线模型、修正双曲线模型、完整指数曲线模型和Gompertz模型,且可用于预测该地区的单桩极限承载力.

Based on features of single pile static load test Qs curve in Zhengzhou area,hyperbolic model （general hyperbolic model and modified hyperbolic model）,complete exponential curve model and growth curve model （MMF model and Gompertz model） are introduced,using the particle swarm optimization to respectively obtain fitting equation under each model and to compare the fitting conditions of each model.Research shows that,for different types of single pile static load test data in Zhengzhou area,MMF model gives the best fitting compared to the ordinary hyperbolic model,modified hyperbolic model,complete exponential curve model and Gompertz model,and can be used to predict the ultimate bearing capacity in Zhengzhou area.