深基坑开挖对邻近高架桥影响及变形控制
On the Effect of the Deep Foundation Pit Excavation on Adjacent Viaducts and Deformation Control
  
中文关键词:深基坑  基坑降水  桩基础  变形分析
英文关键词:deep foundation pit  dewatering for the foundation pit  pile foundation  deformation analysis
基金项目:
作者单位
高丽 中铁十八局集团市政工程有限公司天津300222 
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中文摘要:
      针对某地铁深基开挖过程中对邻近桥梁影响较大的问题,提出了施作隔离桩的解决方案。建立了三维数值分析模型,验证了方案的可行性,并对基坑降水影响作了简要分析,最后对桥桩的水平承载力进行了验算。结果表明,隔离桩能有效减小基坑开挖过程中桥桩的水平位移和弯矩,基坑降水会增加邻近桥桩的水平位移,基坑开挖过程中桩基水平承载力满足要求。研究结果可为类似工程施工提供借鉴,具有较高的工程应用价值。
英文摘要:
      Aiming at solving the problem that the excavation of a subway deep foundation pit has great effects on the adjacent bridges, put forward in the present paper is the solution of providing isolation piles, in which case a three dimensional numerical analysis model is established to verify the feasibility of the scheme, with the effect of dewatering for the foundation pit briefly analyzed, and the horizontal bearing capacity of bridge piles checked fiinally. The results show that the isolation pile can effectively reduce the horizontal displacement and bending moment of the bridge pile in the process of the foundation pit excavation, dewatering for the foundation pit will increase the horizontal displacement of adjacent bridge piles, and the horizontal bearing capacity of pile foundation can meet the requirements in the process of the foundation pit excavation. The results of our research are of high application value in engineering.
高丽.深基坑开挖对邻近高架桥影响及变形控制[J].国防交通工程与技术,2021,19(1):59~63
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