岩土力学2011，Vol.32Issue(2)：481-486,494,7.
考虑桩土效应的双排桩模型及参数研究
Research on model and parameters of double-row piles based on effect of pile-soil contact
刘泉声 1付建军2
作者信息
- 1. 武汉大学,水工岩石力学教育部重点实验室,武汉,430072
- 2. 中国科学院武汉岩土力学研究所,岩土力学与工程国家重点实验室,武汉,430071
- 折叠
摘要
Abstract
Double-row of piles is a new support structure of the deep foundation pit.But its design method is not simple and effective.By means of basic thought of the beam of Winkler foundation, and on the premise of neglecting the friction effect in vertical and space effect between pile and soil, this paper analyzes the mechanical mechanism of support structure of double-row of piles and builds plane bar finite element model based on the effect of pile-soil effect for double-row of piles firstly, and then study the distribution of soil pressure and elastic resistance coefficient around the key parameters of plane bar finite element model of double-row of piles.Considering the critical distance of traditional slip plane of soil behind pit increased by the tension of coupling beam, the distribution law of soil pressure by slip proportional coefficient is obtained.In view of the uncertainty of positive analytical value for elastic resistance coefficient, the value of elastic resistance parameter is proposed by using the optimization method of displacement back analysis.Finally, on the basis of solving steps of optimal criterion function for displacement in bar finite element and back analysis, the doublerowpile and doublerowpileparameter calculation program are compiled respectively; and corresponding engineering calculations are performed.The results show that the calculated displacements are consistent with monitoring displacements, internal forces accord with code requirements and elastic resistance coefficient is accurate comparatively.关键词
双排桩/机制/弹性抗力系数/位移反分析分类
建筑与水利引用本文复制引用
刘泉声,付建军..考虑桩土效应的双排桩模型及参数研究[J].岩土力学,2011,32(2):481-486,494,7.
