- 摘 要
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孫宇坤1,2，關富玲1(1 浙江大學建筑工程學院，杭州 310058； 2 浙江工業(yè)大學建筑工程學院，杭州 310014)
［摘要］以某磚混結構居民樓為研究對象，把基礎和上部結構看作一個有機的整體，按照建筑物-土體-隧道共同作用進行分析。采用ANSYS軟件建立了三維有限元模型，研究計算了盾構隧道施工對地層沉降以及建筑物的沉降、水平變形和應力等的影響。分析表明，建筑物的存在改變了隧道周圍土體位移場的分布；建筑物縱向中軸線的沉降曲線基本符合正態(tài)分布；其不同樓層的水平變形特征差異較大，縱向中軸線的Z向位移曲線和X向位移曲線都不具有對稱性；隧道通過后，建筑物的最大主拉應力尚未超過砌體的抗拉強度平均值，可不采取措施減小其附加變形與應力。
［關鍵詞］盾構隧道；建筑物；有限元法；沉降；應力
中圖分類號：TU362, U451文獻標識碼：A文章編號：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
作者簡介：孫宇坤，博士研究生，Email: sunyukun@zjut.edu.cn。
參考文獻
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