孙宇坤1,2，关富玲1(1 浙江大学建筑工程学院，杭州 310058； 2 浙江工业大学建筑工程学院，杭州 310014)

［摘要］以某砖混结构居民楼为研究对象，把基础和上部结构看作一个有机的整体，按照建筑物-土体-隧道共同作用进行分析。采用ANSYS软件建立了三维有限元模型，研究计算了盾构隧道施工对地层沉降以及建筑物的沉降、水平变形和应力等的影响。分析表明，建筑物的存在改变了隧道周围土体位移场的分布；建筑物纵向中轴线的沉降曲线基本符合正态分布；其不同楼层的水平变形特征差异较大，纵向中轴线的Z向位移曲线和X向位移曲线都不具有对称性；隧道通过后，建筑物的最大主拉应力尚未超过砌体的抗拉强度平均值，可不采取措施减小其附加变形与应力。

［关键词］盾构隧道；建筑物；有限元法；沉降；应力

中图分类号：TU362, U451文献标识码：A文章编号：1002-848X(2012)04-0124-04

Analysis on effects of shield tunnel construction on adjacent masonry building and ground in soft ground

Sun Yukun1,2, Guan Fuling1(1 College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China；2 College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China)

Abstract:Taking a brick masonry structure residential building for example, considering, the tunnel-soil-structure interaction, the building and its foundation were analyzed as a whole. 3D finite element model  was put forward by means of ANSYS program. The ground settlement, building settlement, building horizontal deformation and variation of its stress due to the shield tunnel construction were studied. Analysis results show that the characteristics of the ground settlement with or without considering the building are different. It also shows that the longitudinal central axis settlement curve approximately matches  the normal distribution. The horizontal deformation characteristics between floors in the building have great difference. Its longitudinal central axis displacement curves of the Z coordinate and X coordinate are not symmetrical. Its maximum principal tensile stress does not reach average tensile strength of masonry after the tunnel passing through the building. Therefore, other measures  need not be adopted to reduce its additional deformation and stress.

Keywords:shield tunnel; building; finite element method; settlement; stress

作者简介：孙宇坤，博士研究生，Email: sunyukun@zjut.edu.cn。

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