| 单桩承载力预测的PSO-Gompertz模型研究 |
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| 引用本文： | 杜勇立.单桩承载力预测的PSO-Gompertz模型研究[J].中南公路工程,2012(5):87-91. |
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| 作者姓名： | 杜勇立 |
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| 作者单位： | [1]中南大学土木建筑学院,湖南长沙410075 [2]湖南省交通规划勘察设计院,湖南长沙410008 [3]中南公路建设及养护技术湖南省重点实验室,湖南长沙410008． |
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| 摘 要： | 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—Gompcrtz模型与常用预测模型进行了对比。结果表踢：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5曲线可用logistic函数描述；提出的PSO—Gompertz模型比双曲线模型、指数模型有更高的预测精度。
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| 关 键 词： | 管桩 极限承载力 预测 Gompertz 粒子群 |
The PSO-Gompertz Model Study for Single Pile Capacity Prediction |
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| DU Yongli.The PSO-Gompertz Model Study for Single Pile Capacity Prediction[J].Central South Highway Engineering,2012(5):87-91. |
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| Authors: | DU Yongli |
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| Institution: | DU Yongli(1. School of Civil Engineering and Architecture, Central South University, Changsha, Hunan 410075, China; 2. Hunan Provincial Communications Planning, Survey ＆ Design Institute, Changsha, Hunan 410008, China; 3. Hunan Provincial Key Laboratory of Highway Construction and Maintenance Tech- nology in Southern China, Changsha, Hunan 410008, China) |
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| Abstract: | According to the biological growth law, the Gompertz function model was used to the forecast of single-pile ultimate load after the load transmission mechanism of piles was analyzed, the Par- ticle Swarm Optimization for parameter estimation of the model was provided, the prediction effects of PSO-Gompertz model and double common forecast models were compared with each other based on case- study. The results show that the growth process of pile bearing capacity usually experience the stages of begin, development, maturity and saturation; the load-settlement （Q-s） curve of piles under static load can be described by the Gompertz function; PSO-Gompertz model works better than the hyperbola and in- dex ones in the forecast of single-pile ultimate load. |
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| Keywords: | tubular pile ultimate bearing capacity forecast Gompertz Particle Swarm Optimization |
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