考虑排桩支护影响的高层建筑复合地基沉降分析-《郑州大学学报(工学版)》

文章信息/Info

Title:: Settlement Analysis of Composite Foundation for High-rise Buildings Considering the Effects of Row Piles Retaining Structure

作者:: 郭院成; 王会杰; 陆俊虎.; 郑州大学土木工程学院,河南郑州,450001, 郑州大学土木工程学院,河南郑州,450001, 郑州大学土木工程学院,河南郑州,450001

Author(s):: GUO Yuancheng; WANG Huijie; LU Junhu; Sohool of Civil Engineering，Zhengzhou University，Zhengzhou 450001，China

Keywords:: ubgrade and foundation engineering; settlement deformation; row piles retaining structure; nu—merleal simulation; design selection

摘要:: 针对支护结构对高层建筑地基基础沉降变形分布特征的影响,利用有限元数值模拟手段,建立考虑排桩支护结构影响的复合地基基础的三维模型,以地基基础差异沉降为控制指标,以改变地基变形模量来描述地基支承刚度的空间变化,讨论排桩支护结构存在条件下,复合地基支承刚度空间变化对地基基础沉降等值线分布规律的影响.研究表明,排桩支护结构对地基基础沉降变形分布特征有明显影响,复合地基基础基于差异沉降控制的空间变刚度设计需考虑支护排桩的作用效应.研究成果对减少建筑物基础边缘部分桩、降低基础差异沉降,有效改善筏板和上部结构次应力具有

Abstract:: Row piles retaining structure will affect the settlement distribution of composite foundation for high—rise buildings．Based on this，by using finite element numerical simulation tools，a simple 3一D FEM model of the composite foundation considering the effects of row piles retaining structure is established．By usingdifferential settlement as control indicator and the change of the foundation deformation modulus to express thechanges of bearing stiffness，as well as considering the existence of row piles retaining structure，the distribu—tive regularity of settlement curve is discussed when we use the design method for composite foundation consid—ering of the space—varying rigidity．Research shows that the settlement distribution is obviously affected by rowpiles retaining structure．Hence based on the control of differential settlement，when we use the design methodfor foundation considering of the space—varying rigidity，we should consider the effect of row piles retainingstructure．Research results possess a certain theoretical guidance on reducing the side-piles that locate themarginal part of raft，reducing differential settlement，and ameliorating hypo—stress of the raft and superstructure．