水文地质工程地质2012，Vol.39Issue(5)：42-48,7.
考虑桩土滑移和鼓胀影响的碎石桩复合地基沉降分析方法
A study of settlement calculation of the gravel pile composite ground considering the influence of slip between pile and soil as well as lateral displacement
摘要
Abstract
Based on a thorough study of the deformation mechanism for gravel pile composite ground under flexible foundation, a new method for gravel pile composite ground settlement analysis is set up by using the soil displacement in a unit cell mode. Firstly, the existing vertical displacement model is improved for considering the relative slip between pile and soil in gravel pile composite ground under flexible foundation . Secondly, because the lateral displacement for gravel pile in composite ground cannot be ignored, the analysis method is combined with the influence of the radial displacement. The method for analyzing the friction on pile-soil interface is established. Finally, through the analysis of the unit cell model the analysis method for the displacement in the treated area is obtained. The analysis method can not only reflect the interaction between pile and its surrounding soils as well as the characteristics of slip between piles and soil, but also consider the influence of the lateral deformation of the gravel pile in composite ground settlement analysis. The engineering examples show that the method proposed in this paper is of feasibility and rationality.关键词
柔性基础/碎石桩复合地基/桩土相对滑移量/鼓胀/沉降Key words
flexible foundation/ gravel pile composite ground/ slip between pile and soil/ lateral displacement/ settlement分类
建筑与水利引用本文复制引用
曹文贵,杨泽华..考虑桩土滑移和鼓胀影响的碎石桩复合地基沉降分析方法[J].水文地质工程地质,2012,39(5):42-48,7.基金项目
国家自然科学基金(51078137) （51078137）
高等学校博士学科点专项科研基金(20090161110005) （20090161110005）
