防灾减灾工程学报2012，Vol.32Issue(5)：559-564,6.
基于最佳摄动量法的桩基承载力反演
Optimal Perturbation Algorithm and Its Application in the Pile Bearing Capacity Inversion
蒋鑫 1陈征宙 1于生飞 1刘裕华1
作者信息
- 1. 南京大学地球科学与工程学院,南京210093
- 折叠
摘要
Abstract
High-strain dynamic tentative piling technique is the relatively popular pile testing method for obtaining pile soil parameters. The principle is to get the pile-soil parameters using the measured information of pile top. At present, the more mature method is CAPWAPC, by which the pile-soil model parameters are determined using trial and error analysis. The results obtained by CAPWAPC show a certain degree of randomicity, and the correctness of results extremely depends on the experience of operator. With attempts to use the sophisticated pile-soil model in CAPWAPC as foundation, this study uses the local optimization methods of optimal perturbation algorithm to obtain the pile-soil parameters. Perturbation expansion of the parameters and parameter inversion recursive formula are derived and finally the inversion algorithm is proposed based on the implicit elastic wave dynamic differential equations. The influence of initial parameters on local optimization method is adopted in the proposed model, and suitable initial model can be easily established according to the site condition. Results indicate that the proposed method is reasonable for dynamic testing of pile and foundation.
关键词
高应变/最佳摄动量法/局部优化/参数反演/波动方程Key words
high strain/ optimal perturbation algorithm/ local optimization/ parameter inversion/ wave equation
分类
建筑与水利引用本文复制引用
蒋鑫,陈征宙,于生飞,刘裕华..基于最佳摄动量法的桩基承载力反演[J].防灾减灾工程学报,2012,32(5):559-564,6.
