地铁隧道上方下沉式广场深基坑施工技术  

Construction Technology of Deep Foundation Excavation in Some Sunken Plaza Above Metro Tunnel

作　　者：肖鸣[1] 陈志良[1] 

机构地区：[1]腾达建设集团股份有限公司,浙江杭州310009

出　　处：《施工技术》2014年第17期4-6,共3页Construction Technology

摘　　要：杭州金沙湖绿轴下沉式广场基坑面积大,深度深,位于已建成的地铁1号线盾构区间上方,坑底距盾构管片距离近,设计采用"门"字形三轴搅拌桩全断面套打形式对地铁隧道外围进行加固保护,利用数值分析模拟土体分块卸荷,采用施工信息化手段严格按隧道管片位移监测情况,结合分区分段跳槽开挖的方法进行施工,有效地解决了基坑施工对下卧地铁隧道的影响,确保了地铁安全。The large and deep foundation excavation in the green axis sunken plaza in Jinsha Lake, Hangzhou is located above the shield zone of Metro Line 1 . The foundation bottom is very adjacent to the shield segment. Door shape triaxial mixing piles with full face striking method were used to support the surrounding metro tunnel. The numerical simulating analysis was adopted for soil unloading. The displacement of tunnel segments was strictly monitored by informative construction. The “sub-region, sub-section”method was used for hopping excavation. As a result, the excavation construction of deep foundation excavation has no obvious influence on the underlying metro tunnel, and the safety of subway station is ensured.

关 键 词：深基坑 地铁 下沉式广场 施工技术 

分 类 号：TU753[建筑科学—建筑技术科学]