复杂基坑开挖对鸡鸣寺地铁站及区间隧道的变形影响分析  

Analysis of the influence of complex foundation pit excavation on Jimingsi metro station and tunnel

作　　者：毛昆明[1] 陈磊 唐拥军 MAO Kun-ming;CHEN Lei;TANG Yong-jun(School of Architecture Engineering,Jingling Institute of Technology,Nanjing 210009,China;China United Engineering Corporation Limited,Hangzhou 310052,China;Guangxi Hydraulic Research Institute,Nanning 530023,China)

机构地区：[1]金陵科技学院建筑工程学院,南京210009 [2]中国联合工程有限公司,杭州310052 [3]广西水利科学研究院,南宁530023

出　　处：《广西水利水电》2021年第1期16-20,共5页Guangxi Water Resources & Hydropower Engineering

基　　金：国家自然科学基金(51608267);江苏省高校自然科学基金(18KJD560002);金陵科技学院博士科研启动基金。

摘　　要：为分析复杂基坑开挖对南京地铁3、4号线换乘站鸡鸣寺车站及区间隧道的影响,使用Abaqus软件建立了地铁结构-基坑-围护-周围土体耦合的三维有限元分析模型,分析了基坑开挖时周边土体及地铁结构产生的位移,结果表明:基坑三个方向的变形在各个施工阶段均在控制标准控制范围内;区间隧道的变形曲率半径和相对变曲、车站结构变形、车站与隧道连接处差异变形、车站主体与附属变形缝处差异沉降也均符合要求;整个地铁结构各个方向的位移最大处在不断变换位置,两条地铁区间、车站均出现过,因此监测点布置的位置应随施工流程逐渐变换;使用有限元软件进行预测性评估分析很有必要,确保使用有限的传感器能监测到必要的部位,消除安全隐患。In order to analyze the influence of complex foundation pit excavation on the Jimingsi transfer station and tunnel of Nanjing metro lines 3 and 4,Abaqus software was used to establish the three-dimensional finite element model of subway structure-foundation pit-retaining-surrounding soils coupling.Displacement of surrounding soil and subway structure during foundation pit excavation was analyzed.The results of analysis demonstrate the defor⁃mation of foundation pit in three directions are within the control standard at various construction stages;the defor⁃mation curvature radius and the relative bending of tunnel,deformation of station structure,deformation difference at the joints between station and tunnel,settlement difference at the joint between main and auxiliary structures of station all conform to the specifications;the position where the maximum displacement of the entire subway struc⁃ture in any direction occur keep changing,including at two tunnels and station.Therefore,the monitoring location should gradually change with the construction process.It is necessary to predict and analyze with finite element soft⁃ware so as to ensure the required locations are detected with the limited sensors and potential safety hazard is elimi⁃nated.

关 键 词：基坑开挖 地铁 车站 隧道 

分 类 号：TU753[建筑科学—建筑技术科学] U451[建筑科学—桥梁与隧道工程]