摘要
为分析隧道盾构施工时旋挖桩对减少邻近建筑物位移的效果,以苏州地铁4号线工程苏州火车站站至北寺塔站区间的一栋三层框架结构为例,对隧道盾构施工过程中的地表沉降进行了实测,并采用有限元软件ABAQUS建立三维弹塑性模型,模拟了隧道盾构施工过程中在有无旋挖桩隔离两种情况下该建筑物的水平和沉降变形,对两种情况下建筑物的变形进行了对比分析。分析结果表明,隧道盾构施工过程中,旋挖桩能有效地隔断桩内外的地表变形,明显减少盾构施工引起的邻近建筑物沉降。相对于无旋挖桩隔离,有旋挖桩隔离时建筑物的柱底水平位移减少56.2%左右,竖向沉降位移减少67.6%左右。
To analyze the isolation piles of reducing the effect on the displacement of adjacent buildings as shield tunneling, as an example of the reinforcing result of a three-layer frame structure of Suzhou Subway Line 4 between Suzhon railway station and Beisita station, surface settlement is measured in shield tunneling process. Three-dimensional elastoplastic model is established by using the finite element software ABAQUS, that the horizontal deformation and settle- ment deformation in both cases whether the isolated pile of neighboring buildings are simulated in shield tunneling pro- cess, a comparison analysis on deformation of the building under two different working conditions is carried out. The results indicate that, in the process of shield tunneling, swivel-driven pile can effectively cut off the pile surface subsidence within and outside, shield construction is reduced by causing building deformation of neighboring buildings. Relative to without swivel-driven pile, swivel-driven pile can reduce 56.2% bottom horizontal displacement for building, which can also reduce 67.6% vertical displacement sedimentation.
出处
《混凝土与水泥制品》
2015年第12期90-93,共4页
China Concrete and Cement Products
基金
江苏省企业研究生工作站项目(2010.02)
关键词
盾构施工
旋挖桩
隔离效果
数值模拟
Shield construction
Swivel-driven Pile
Isolation effect
Numerical simulation
