立白大厦基坑开挖对临近地铁隧道的影响评价  

The Impact Assessment of LiBai Tower's Foundation Pit Excavation to Adjacent Metro Tunnel

作　　者：欧旻韬[1] 吴远亮[1] 焦柯[1] 

机构地区：[1]广东省建筑设计研究院,广州510010

出　　处：《广东土木与建筑》2012年第7期3-6,共4页Guangdong Architecture Civil Engineering

摘　　要：广州立白大厦基坑工程距地铁隧道最小距离仅20m,其施工是影响区间隧道及地铁车站正常运营的一个重要因素,若施工方案不当或保护措施不足,则很可能引起区间隧道发生过大的不均匀变形。为此建立了该基坑工程的数值分析模型,模拟实际施工工况,动态地分析了施工过程中开挖卸荷对地铁隧道的影响,为优化设计和施工提供了有益的参考。The foundation pit of LiBai Tower in Guangzhou is excavated on adjacent existing metro tunnel.And the minimum distance between the foundation pit and metro tunnel is just 20m.Excavation near the metro is an important factor that affects normal operations of metro station and tunnels.If either the construction plan or protection measures are inappropriate,too much non-uniform deformation may occur.The paper makes a numerical model of the foundation pit project,and simulated the practical construction process and then dynamically analyzes the affection of excavating on metro tunnel.The result provides valuable reference to design and construction.

关 键 词：基坑开挖 区间隧道 数值模拟 三维有限元 

分 类 号：U451[建筑科学—桥梁与隧道工程]