类矩形盾构施工对邻近建筑物影响的数值模拟  

NUMERICAL SIMULATION OF INFLUENCE OF QUASI-RECTANGULAR SHIELD CONSTRUCTION ON ADJACENT BUILDINGS

作　　者：魏纲[1] 孙樵 洪子涵 WEI Gang;SUN Qiao;HONG Zihan(Department of Civil Engineering, Zhejiang University City College, Hangzhou 310015, China)

机构地区：[1]浙江大学城市学院土木工程系,杭州310015

出　　处：《低温建筑技术》2018年第12期86-89,94,共5页Low Temperature Architecture Technology

基　　金：浙江省科技厅公益技术研究项目(2016C33051)

摘　　要：为研究类矩形盾构施工对邻近十字交叉梁基础框架建筑物的影响,基于建筑物-土体-隧道之间的共同作用,本文采用MIDAS/NX软件建立类矩形盾构隧道垂直下穿十字交叉梁基础框架建筑物的三维有限元模型,考虑隧道水平位置改变和土质条件的影响,分析建筑物受类矩形盾构施工影响的变形和受力规律。研究结果表明,当隧道轴线到建筑物中轴线的水平距离L=0m时,随着隧道开挖的进行建筑物的沉降量增大;框架最大第一主应力和最大剪应变总体上增大;土质条件改变影响较大;随着L增大,框架的最大第一主应力和最大剪应变呈现减小趋势,建筑物产生向隧道一侧的倾斜,L增大到一定距离后建筑物几乎不受影响。This paper studies the influence of quasi-rectangular shield tunnel construction on adjacent frame buildings with grillage beams foundation. Considering the interaction of building, soil and tunnel, a three-dimensional finite element model is established by using MIDAS/NX software, in which a quasi-rectangular shield tunnel crosses underneath a frame building with grillage beams foundation. Considering the influence of tunnel horizontal position and soil conditions, the deformation and stress of building during quasi-rectangular shield tunnel construction is analyzed. The results show that when the horizontal distance L between the axis of building and tunnel is zero, the settlement of building increases with tunnel excavation, and the maximum first principal stress and the maximum shear strain of the frame structure also increase totally. The soil conditions affect the deformation and stress of structure greatly. With the increase of L, the maximum first principal stress and the maximum shear strain of the frame structure decrease, and the building is inclined to tunnel. When L increases to a certain value, the building is almost unaffected.

关 键 词：类矩形盾构 十字交叉梁基础 框架建筑物 数值分析法 

分 类 号：TU433[建筑科学—岩土工程]