地铁竖井深基坑施工影响下既有人行天桥变形规律  

Deformation Law of Existing Pedestrian Overpasses under the Influence of Deep Foundation Pit Construction in Subway Shafts

作　　者：王健 张照太 马文辉 王健淇 Wang Jian;Zhang Zhaotai;Ma Wenhui;Wang Jianqi(Beijing Urban Rail Transit Construction Engineering Co.,Ltd.,Beijing,China)

机构地区：[1]北京城建轨道交通建设工程有限公司,北京

出　　处：《科学技术创新》2024年第19期185-188,共4页Scientific and Technological Innovation

摘　　要：城市繁华地区的地铁隧道多采用浅埋暗挖法建设,而作为施工通道的竖井的深度和尺寸通常较大,不可避免地会对周边建构筑物产生影响。依托北京地铁22号线某隧道竖井施工,采用数值模拟方法,模拟竖井分层开挖施工,研究施工过程对既有人行天桥的影响规律,为类似工程提供借鉴。Subway tunnels in bustling urban areas are often constructed using shallow buried and concealed excavation methods,and the depth and size of vertical shafts used as construction channels are usually large,inevitably affecting surrounding buildings and structures.Based on the construction of a vertical shaft in a tunnel of Beijing Metro Line 22,numerical simulation methods were used to simulate the layered excavation construction of the shaft,and the impact of the construction process on the existing pedestrian overpass was studied,providing reference for similar projects.

关 键 词：地铁隧道 施工竖井 人行天桥 数值模拟 变形规律 

分 类 号：TU941[建筑科学—建筑技术科学]