复合地基在地震作用下附加沉降的研究

英文篇名：Study on Additional Settlement of Composite Foundation under Earthquake Effect
中文刊名：路基工程
英文刊名：Subgrade Engineering
作者：刘东 ; 贾智信 ; 孙长军 ; 乔京生
英文作者：LIU Dong1 ; JIA Zhi-xin1 ; SUN Chang-jun1 ; QIAO Jing-sheng2 (1.Tangshan Caofeidian Infrastructure Construction Investment Group ; Tangshan 063200 ; Hebei ; China ; 2.School of Civil Engineering ; Tangshan College ; Tangshan 063000 ; Hebei ; China)
中文关键词：复合地基 ; 边载 ; 地震作用 ; 附加沉降
英文关键词：composite foundation ; side load ; earthquake effect ; additional settlement
出版日期：2011-06-20
机构：唐山曹妃甸基础设施建设投资集团;唐山学院土木工程系;
年：2011
期：03
出版单位：路基工程

摘要

通过有限元程序ANSYS建立模型,研究了无边载复合地基、有边载复合地基在地震作用下的附加沉降,结果表明,采用复合地基技术,对减少附加沉降有很好的效果。由对群桩复合地基不同桩位特点进行分析得知,群桩复合地基中桩附加沉降大于边桩、角桩,提出了附加沉降系数的概念及计算式。引入边载作用下复合地基附加沉降修正系数的概念,有边载复合地基抗震陷能力优于无边载复合地基。
The additional settlement of composite foundation with and without side load under earthquake effect is separately analyzed based on finite element model using ANSYS software.The results show that composite foundation has better effect in reducing additional settlement than natural foundation.In addition,through analyzing the characteristics of different pile positions in pile group composite foundation,it is shown that the additional settlement of middle pile is larger than that of side pile and corner pile.And thus additional settlement coefficient and calculation formula are put forward.Through introducing the modified coefficient of additional settlement under side loads,it is indicated that composite foundation with side loads has better capability than that without side loads in earthquake resistance.

引文

[1]邹力,吴兴序,彭声应.京沪高速铁路桩端注浆群桩基础沉降计算研究[J].路基工程,2010(2):51-53.
    [2]周勇,刘升传,吴立坚.高速铁路CFG桩柔性载荷试验数值模拟分析[J].路基工程,2010(1):96-98.
    [3]姜勇,赵双林.武广客运专线CFG桩质量检测与评价[J].路基工程,2007(3):112-113.
    [4]马斌,蒋广全,易图斌.CFG桩单桩承载能力现场试验研究[J].路基工程,2008(2):102-103.
    [5]田建平,但汉成.CFG桩复合地基桩土应力比简化计算[J].路基工程,2009(2):107-109.
    [6]龚晓南.地基处理技术发展与展望[M].北京:中国水利水电出版社,知识产权出版社,2004:13-34.
    [7]Fa-Yun Liang,Long-Zhu Chen,Xu-Guang Shi.Numerical analysis ofcomposite piled raft with cushion subjected to vertical load[J].Computersand Geotechnics,2003,(30):443-453.
    [8]徐至钧.水泥粉煤灰碎石桩复合地基[M].北京:机械工业出版社,2004:56-65.
    [9]乔京生.复合地基及变刚度复合地基力学性状分析[D].中国矿业大学博士论文,2005.
    [10]刘利民,舒翔,雄巨华.桩基工程的理论进展与工程实践[M].北京:中国建材工业出版社,2002:56-78.
    [11]牛志荣,李宏,穆建春.复合地基处理及其工程实例[M].北京:中国建材出版社,2000:343-348.
    [12]陈清军,姜文辉,楼梦麟.群桩基础三维非线性地震反应分析[J].冲击与振动,2003,22(3):98-102.
    [13]王志华,刘汉龙,陈国兴,等.土-结构相互作用效应对结构基底地震动影响的试验研究[J].地震工程与工程振动,2005,25(3):132-137.
    [14]张建民,王刚.考虑地基液化后大变形的桩-土动力相互作用分析[J].清华大学学报(自然科学版),2004,44(3):429-432.
    [15]不同土性的地基-结构动力相互作用下桩基础的动力反应[J].武汉大学学报(工学版),2005,38(4):50-54.