文章摘要
赵太东1 ,贾浩敏 2.盾构隧道穿越成都西特大桥群桩桩基施工变形控制技术研究[J].西昌学院学报(自然科学版),2020,34(3):22-26.
盾构隧道穿越成都西特大桥群桩桩基施工变形控制技术研究
Study on Deformation Control Technology for Shield Tunnel Construction under Chengdu Xite Bridge Group Pile Foundations
  
DOI:
中文关键词: 盾构隧道  特大桥群桩桩基  数值计算  施工变形控制技术  监控量测
英文关键词: shield tunnel  extra-large bridge group pile foundation  numerical calculation  deformation control technology for construction  monitor and measure
基金项目:
作者单位
赵太东1 ,贾浩敏 2 1.中铁城市发展投资集团有限公司四川 成都 6100002四川省南部县第三中学四川 南充 637000 
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中文摘要:
      随着城市轨道交通的快速发展,盾构隧道穿越既有建(构)筑物所引起的沉降、变形等施工安全问题,引起了各方的高度关注。依托成都轨道9号线一期工程,采用三维有限元分析软件ANSYS,对盾构隧道穿越成都西特大桥群桩桩基施工变形控制技术进行了研究,提出了在穿越前采用“钢管隔离桩+地面深孔袖阀管”注浆的预加固技术,最终监测数据表明,地表沉降最大值为-9.82 mm、桩基沉降最大值为-6.97 mm,均小于监测规定值,证明了预加固的必要性。
英文摘要:
      In view of the settlement and deformation of existing structures when constructing subway shield tunnels,in this paper we study the deformation control technology for shield tunnel construction of Chengdu Rail Transit Line 9 under Chengdu Xite Bridge group pile foundations. The three-dimensional finite element analysis software ANSYS was used to carry out numerical simulation and field monitoring test, and the reinforcing technology of "steel pipe isolation pile + ground deep-hole sleeve valve tube pre-grouting" was proposed before the construction of shield tunnel through the gravel stratum. The final observed data proved that the maximum accumulated settlement of the surface and the pile foundation was -9.82 mm and -6.97 mm respectively, all smaller than prescribed values, which proved the necessity of the reinforcement treatment.
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