双线盾构施工对邻近框架建筑物影响的研究  

Effect Analysis of Frame Building Crossed by Double-Line Parallel Shield Tunnel

作　　者：魏纲[1] 魏新江[1] 

机构地区：[1]浙江大学城市学院土木工程系,杭州310015

出　　处：《地下空间与工程学报》2013年第2期339-343,共5页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金资助项目(51078332);浙江省自然科学基金资助项目(Z1100016);浙江省教育厅科研项目(Y201122550)

摘　　要：采用三维MIDAS/GTS软件,考虑建筑物-土体-隧道共同作用,模拟了双线盾构垂直穿越独立基础的框架结构建筑物的工况。分析结果表明:在左线隧道已穿越建筑物的工况下,随着右线盾构机穿越建筑物的前后,建筑物左右两侧沉降差逐渐减小,最后右线沉降稍大于左线;沿隧道掘进方向的建筑物基础顶面产生不均匀沉降,先逐渐增大,随后逐渐减小并趋向于零;建筑物的最大第一主应力P1超出标准值,可能引起一部分建筑结构开裂;随着建筑物中轴线到两条隧道中轴线的水平距离L的增大,建筑物呈现向隧道一侧倾倒的趋势,框架最大第一主应力和最大剪应变总体上呈减小趋势,柱间差异沉降则变化不大。Considering the interaction of building-soil-tunnel, the frame building with independent foundation vertically crossed by double-line parallel shield tunnel was simulated by 3D MIDAS / GTS software, and the impact of tunnel construction on the building was analyzed. The results show that： in the case that the left lane of the tunnel crossed the building, along with the right line shield machine traversing building around, the differential settlement decreases gradually at the left and right sides of building, the settlement of right line slightly larger than that at the left lane after the right line tunnel passes completely. During shield tunnel excavation, the top of the building＇ s foundation had uneven settlement in the driving direction, and it increased first then decreased gradually to zero. The biggest first principal stress Pl of the building surpasses the normal value, possibly causes cracking of a part of construction structure ; Along with the enlargement of interval L from middle hne of the building to two tunnel axes, the building has a trend to dump to the tunnel side, the biggest first principal stress and the biggest shearing strain has a tendency as a whole to be reduced. The change of differential settlement between columns is little.

关 键 词：双线盾构隧道 独立基础 框架结构 有限单元法 

分 类 号：TU433[建筑科学—岩土工程]