CAJ | 학술논문

以上跨南京地铁2号线的深基坑开挖为工程背景，文章采用通用有限元软件MIDAS／GTS ，建立三维模型进行开挖施工全过程模拟，分析了在基坑开挖过程中影响下穿隧道变形的原因和控制隧道变形的施工措施。通过比较数值模拟结果与现场实测数据，得出基坑开挖引起下穿隧道纵向隆起曲线呈正态分布，地铁隧道纵向隆起范围大约为基坑沿隧道方向开挖长度的2～3倍。研究结果表明，采用的施工措施可以有效控制隧道的上抬变形，相关结论和施工措施可供类似工程参考。
이상과남경지철2호선적심기갱개알위공정배경，문장채용통용유한원연건MIDAS／GTS ，건립삼유모형진행개알시공전과정모의，분석료재기갱개알과정중영향하천수도변형적원인화공제수도변형적시공조시。통과비교수치모의결과여현장실측수거，득출기갱개알인기하천수도종향륭기곡선정정태분포，지철수도종향륭기범위대약위기갱연수도방향개알장도적2～3배。연구결과표명，채용적시공조시가이유효공제수도적상태변형，상관결론화시공조시가공유사공정삼고。
Based on the practice of deep foundation pit excavation adjacent to Nanjing Metro Line 2 ,a 3D model is established by using the universal finite element software MIDAS/GTS to simulate the w hole process of the deep excavation .T he reasons of the tunnel deformation during the excavation are analyzed ,and the construction measures to control the deformation of the adjacent metro tunnel are discussed .Based on the analysis of the calculation results and the monitoring data ,some conclusions about the deformation of the underlying tunnel influenced by the foundation pit excavation can be ob‐tained as follow s :the longitudinal heave curve of the tunnel is nearly a normal distribution curve ,and the longitudinal range of the tunnel heave is about 2‐3 times the foundation pit excavation length along the tunnel axis .T he results show that the presented construction measures can effectively control the heave of the tunnel .Relevant conclusions and construction measures can provide reference for similar projects .