首页 | 本学科首页   官方微博 | 高级检索  
     

碎石桩复合地基承载及变形性状研究
引用本文:刘杰,赵明华,何杰. 碎石桩复合地基承载及变形性状研究[J]. 湖南大学学报(自然科学版), 2007, 34(5): 15-19
作者姓名:刘杰  赵明华  何杰
作者单位:湖南大学,岩土工程研究所,湖南,长沙,410082;湖南工业大学,岩土工程研究所,湖南,株洲,412008;湖南大学,岩土工程研究所,湖南,长沙,410082;湖南工业大学,岩土工程研究所,湖南,株洲,412008
基金项目:国家自然科学基金资助项目(50578169)
摘    要:为探讨碎石桩复合地基的承载力、加固区压缩量与桩周土塑性区展开半径的关系,在基于碎石桩与桩周土的竖向位移相等、侧向变形协调与连续的条件下,利用弹塑性理论对碎石桩复合地基的承载及变形性状进行了分析研究,推导出了作用在复合地基上的荷载、碎石桩所分担的荷载及加固区压缩量与桩周土塑性区半径的关系的系列解析算式.算例表明,作用在复合地基上的荷载、碎石桩所分担的荷载及加固区压缩量与桩周土塑性区半径的关系几乎是线性的.为验证本文方法的可行性,将模型试验的结果与计算结果进行了对比.对比表明:加固区压缩量的计算结果与实测结果的相对误差未超过5%.

关 键 词:碎石桩  复合地基  承载力  沉降  弹塑性理论
文章编号:1000-2472(2007)05-0015-05
修稿时间:2006-06-25

Research on Bearing and Deformation Characters of Composite Foundation with Granular Columns
LIU Jie,ZHAO Ming-hu,HE Jie. Research on Bearing and Deformation Characters of Composite Foundation with Granular Columns[J]. Journal of Hunan University(Naturnal Science), 2007, 34(5): 15-19
Authors:LIU Jie  ZHAO Ming-hu  HE Jie
Affiliation:1. Institute of Geotechnical Engineering, Hunan Univ, Changsha,Hunan 410082, China; 2. Institute of Geotechnical Engineering, Hurrah Univ of Technology, Zhuzhou,Hunan 412008, China
Abstract:To explore the relations among the bearing capacity of the composite foundation with granular column,the compression value of the reinforcement area and the plastic area radius of surrounding pile soil,the bearing and deformation characters of the composite foundation with granular columns were analyzed with elastic-plastic theory,based on the vertical deformation equality between granular column and surrounding pile soil,on lateral deformation harmony and continuum.A series of analytical formulae,e.g.,between the load exerted on the composite foundation or the distributive load of granular columns or the compression value of the reinforcement area and the plastic area radius of surrounding pile soil,were derived.Design idea of double control on bearing capacity and settlement was proposed for the composite foundation with granular columns.Calculation example showed that the relations,for example,between the load exerted on the composite foundation or the distributive load of granular columns or the compression value of the reinforcement area and the plastic area radius of surrounding pile soil,were almost linear.To prove the feasibility of the proposed method,the results of model tests were compared with those of calculation,and the error of the compression value of the reinforcement area did not exceed 5%.
Keywords:granular column  composite foundation  bearing capacity  settlement  elastic-plastic theory
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《湖南大学学报(自然科学版)》浏览原始摘要信息
点击此处可从《湖南大学学报(自然科学版)》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号