湿陷性黄土地区某高层建筑长短桩复合地基现场试验研究  

In-situ test study on the long-short-pile composite foundation of a high-rise building in collapsible loess area

作　　者：翟晓力[1,2] 葛忻声[1] 张黎明[1] 白晓红[1] 

机构地区：[1]太原理工大学建筑与土木工程学院,太原030024 [2]山西水利职业技术学院,太原030027

出　　处：《建筑结构》2013年第10期84-88,75,共6页Building Structure

基　　金：国家自然科学基金项目(50678110)

摘　　要：以太原某采用长短桩复合地基的高层建筑在湿陷性黄土场地上开展的现场试验所得到数据为依据,分析了荷载作用下桩-土共同作用及地基变形情况。详细讨论了基底下长短桩及地基土应力、桩-土应力比、荷载分担比和长短桩桩身轴力随上部荷载变化的分布规律,以及长短桩复合地基的变形组成及其各组成部分之间的关系随上部荷载变化的规律,为长短桩复合地基的理论研究和优化设计提供参考。Based on the data from in-situ tests of the long-short-pile composite foundation of a high-rise building in collapsible loess area in Taiyuan,the pile-soil interaction and foundation deformation were analyzed.Detailed discussion was given to the stress of the long-short pile and of the foundation soil,as well as pile-soil stress ratio,load-sharing ratio,and axial force of long and short piles as the upper load changes.In addition,the deformation components of the long-short-pile composite foundation and the variation of the relationship between the components when the upper load changes were also analyzed,which can be references for the theoretical study and optimal design of long-short-pile composite foundations.

关 键 词：湿陷性黄土地区 高层建筑 长短桩复合地基 承载性状 变形机理 

分 类 号：TU475.3[建筑科学—结构工程]