摘要
深圳地铁7号线盾构区间在YDK14+180^+280段进行近接桩基施工中,为了严格控制施工对近接桩基的扰动,以保证施工的安全性,通过有限元软件分析了不同掘进姿态在盾构施工过程中对近接桩基的影响。指出:1)盾构掘进姿态是施工过程中对近接结构物影响十分显著的因素,施工时应加以严格控制;2)在盾构蛇行推进过程中,随桩基与掌子面距离的减小和盾构蛇行偏角的加大,盾构施工掘进对桩基的影响程度在加大;3)在盾构刀盘推进至距离桩基间距为2.0D时,应严格控制盾构施工过程中的掘进姿态,特别需要控制盾构的左右偏离。
From YDK14＋180 to YDK14＋280 of a running tunnel on Line 7 of Shenzhen Metro, the shield bores close to the existing pile foundations of a bridge. In the paper, the influence of different shield attitudes on the pile founda-tions is analyzed by means of finite element program, so as to bring the disturbance to the pile foundations under effec-tive control and to ensure the tunneling safety. Conclusions drawn are as follows：1） Shield attitude has great influence on the pile foundations, therefore shield attitude should be well controlled during tunneling;2） As the distance between the shield and the pile foundations reduces and the shield rolling angle increases, the impact of shield boring on the pile foundations grows;3 ） When the distance between the shield cutterhead and the pile foundation is twice the tunnel diameter, the rolling of the shield shall be strictly controlled.
出处
《隧道建设》
北大核心
2015年第5期413-418,共6页
Tunnel Construction
关键词
深圳地铁
盾构掘进姿态
近接桩
有限元分析
变形特征
Shenzhen Metro
shield attitude
pile foundation
finite element analysis
deformation characteristics
作者简介
胡德华（1967-），男，河南信阳人，1993年毕业于南京建筑工程学院，测量工程专业，本科，高级工程师，现从事地铁施工管理工作。
