• 中国科学引文数据库(CSCD)来源期刊
  • 中文核心期刊中文科技核心期刊
  • Scopus RCCSE中国核心学术期刊
  • 美国EBSCO数据库 俄罗斯《文摘杂志》
  • 《日本科学技术振兴机构数据库(中国)》
二维码

隧道建设(中英文) ›› 2012, Vol. 32 ›› Issue (3): 309-314.DOI: 10.3973/j.issn.1672-741X.2012.03.008

• 研究与探索 • 上一篇    下一篇

成都某地铁车站排桩支护结构受力变形规律研究

陈泽昌1,毛坚强2,刘建国1   

  1. (1. 深圳市市政设计研究院有限公司, 深圳 518026; 2. 西南交通大学土木工程学院, 成都 610031)
  • 收稿日期:2012-02-22 修回日期:2012-03-29 出版日期:2012-06-20 发布日期:2012-07-09
  • 作者简介:陈泽昌(1981—),男,广东信宜人,2011年毕业于西南交通大学岩土工程专业,工学硕士,工程师,现从事地铁结构、岩土专业的设计、监测等工作。

Research on Displacement and Stress of Soldier Pile Structure  in Foundation Pit of Metro Station in Chengdu

CHEN Zechang1, MAO Jianqiang2, LIU Jianguo1   

  1. (1. Shenzhen Municipal Design and Research Institute Co., Ltd., Shenzhen 518026, China; 2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China)
  • Received:2012-02-22 Revised:2012-03-29 Online:2012-06-20 Published:2012-07-09

摘要: 为了研究排桩支护结构的受力变形规律,指导基坑的信息化施工,针对成都某地铁车站基坑的地质条件较差、开挖深度较大(23m)、支护形式较复杂(排桩+4道钢管支撑)的特点,对基坑的施工过程进行了精心监测,并建立了三维有限元模型,应用ABAQUS软件对基坑的开挖过程进行数值模拟。通过计算结果与监测结果的对比分析发现: 1)多支点排桩支护结构的桩身水平位移曲线通常呈“弓形”分布,第1道支撑对减小桩顶位移有非常重要的作用; 2)支撑的设置对减小桩身弯矩有重要作用; 3)支撑轴力会受到相邻支撑设置的影响; 4)计算桩后土压力与朗肯主动土压力、静止土压力均有差异。

关键词: 成都地铁车站, 基坑, 排桩, 监测, 数值模拟, 受力变形

Abstract: The geological condition of the foundation pit of a Metro station in Chengdu is very bad. The depth of the foundation pit is 23m, and the supporting structure of the foundation pit is complex. The construction of the foundation pit is monitored. 3D finite element models are established, and the excavation of the foundation pit is numerically simulated by means of ABAQUS software. The comparison and contrast between the calculation results and the monitoring results shows that: 1) The horizontal displacement curves of the multipoint braced soldier piles generally present “C” shape, and the firstlevel bracing plays an important role in reducing the displacement of the pile head. 2) The bracing plays an important role in reducing the bending moment of the piles. 3) The axial force of the bracing can be affected by the neighboring bracing. 4) There are differences among the calculated lateral earth pressure, Rankine active earth pressure and static earth pressure.

Key words: Chengdu Metro station, foundation pit, soldier pile, monitoring, numerical simulation, stress, deformation