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在对桩的荷载传递规律进行分析的基础上,运用生物生长观点将Gompertz函数模型用于单桩极限荷载的预测中,给出模型参数估计的粒子群(PSO)方法,并在实例分析的基础上将PSO-Gompertz模型与常用预测模型进行了对比。结果表明:在桩顶静荷载作用下,单桩承载力的发展经历了发生、发展、成熟并趋于饱和的生长过程;桩的荷载Q～沉降s曲线可用logistic函数描述;PSO-Gompertz模型比双曲线模型、指数模型有更高的预测精度。
Based on the analysis of the load transfer rule of the pile, the Gompertz function model is used to predict the ultimate load of the pile from the point of view of biological growth, and the Particle Swarm Optimization (PSO) method for estimating the model parameters is given. Based on the case study The PSO-Gompertz model is compared with the commonly used forecasting model. The results show that under the static load of pile top, the development of bearing capacity of single pile experiences the occurrence, development, maturity and tends to be saturated. The curve of load Q ~ settlement s-curve of pile can be described by logistic function. The PSO-Gompertz model ratio Hyperbolic model, exponential model has a higher prediction accuracy.