基于Plaxis的大直径素混凝土桩复合地基数值分析
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摘要
大直径素混凝土桩由于桩径大,更能发挥桩侧及桩端阻力,具有良好的经济性和适用性,已成为地基处理的一种重要方法。结合大直径素混凝土桩复合地基工程项目设计及地质情况,建立了Plaxis3D模型,通过动态模拟加载全过程,分析了桩土承担荷载比、桩顶位移、桩身轴力情况,并进行了施工后的检测验证,表明大直径素混凝土桩在桩侧承载力发挥,减小地基沉降和提高地基承载力具有一定的优势,可为其他类似复合地基提供一种可行的分析方法。
Pile side and pile tip resistance of large diameter plain concrete piles can be developed more and more economical and applicable because of their large pile diameter,and it has become an important method of foundation treatment. In this paper,the Plaxis3 D model had been established combining with the design and geological conditions of large diameter prime concrete pile composite foundation project,the pile-soil to bear the load ratio,pile top displacement,axial force of pile body condition were analyzed by simulating the whole process of loading,and the detection and verification after construction were carried out. It showed that the large diameter of plain concrete piles had certain advantages in bearing capacity to exert and reduce ground settlement and improve the bearing capacity of foundation soil,which would provide a feasible analysis method for other similar composite foundations.
Pile side and pile tip resistance of large diameter plain concrete piles can be developed more and more economical and applicable because of their large pile diameter,and it has become an important method of foundation treatment. In this paper,the Plaxis3 D model had been established combining with the design and geological conditions of large diameter prime concrete pile composite foundation project,the pile-soil to bear the load ratio,pile top displacement,axial force of pile body condition were analyzed by simulating the whole process of loading,and the detection and verification after construction were carried out. It showed that the large diameter of plain concrete piles had certain advantages in bearing capacity to exert and reduce ground settlement and improve the bearing capacity of foundation soil,which would provide a feasible analysis method for other similar composite foundations.
引文
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[12]艾锡春.组合式复合地基在复杂场地高层建筑物中的应用[J].铁道建筑技术,2009(6):118-120.
[2]胡志.素混凝土桩复合地基试验研究及变形稳定性分析[D].四川:重庆大学,2004:11-12.
[3]洪波.大直径素混凝土桩复合地基设计计算理论研究[D].成都:溪南交通大学,2014:1-2.
[4]林朝.素混凝土桩复合地基的应用实例[J].中国新技术新产品,2010(11):78-79.
[5]吴学林,唐国艺,戴彦雄.素混凝土桩在委内瑞拉混合土地层中的应用[J].岩土工程技术,2014,28(1):1-4.
[6]蒋明镜,周雅萍,朱方园,等.素混凝土桩复合地基承载机理的离散元分析[J].水利与建筑工程学报,2012,10(3):1-7.
[7]胡志,王贤能,胡岱文,等.素混凝土桩复合地基承载特性分析[J].重庆建筑大学学报,2004,26(3):46-50.
[8]胡忠,王志诚,陈国学,等.塑性有限元数值模拟的二维及三维网格重划技术[J].清华大学学报:自然科学版,1996(3):78-83.
[9]秦立新.桩台网复合地基加固区沉降研究[J].铁道建筑技术,2014(11):66-68.
[10]陈小满.CFG桩桩土分担的荷载比研究[J].科技资讯,2007(15):9-10.
[11]蒋明镜,周雅萍,朱方园,等.素混凝土桩复合地基承载机理的离散元分析[J].水利与建筑工程学报,2012,10(3):1-7.
[12]艾锡春.组合式复合地基在复杂场地高层建筑物中的应用[J].铁道建筑技术,2009(6):118-120.