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北京奥林匹克公园中心区地下交通联系通道工程下穿区内东西向干道中一路段,受现况道路及市政管线限制,采用浅埋暗挖单跨平顶直墙结构,隧道结构净跨12.25m,开挖跨度14.95m,单跨如此大跨度暗挖平顶直墙隧道在北京地区尚属首例。本文对本浅埋暗挖超大跨平顶直墙隧道相关设计与施工技术要点进行分析总结。
The underground traffic link corridor in the central area of Beijing Olympic Park under the section of east-west arterial trunk road in the area is subject to the current status of roads and municipal pipelines. The shallow-buried single-span flat-roofed straight-wall structure is adopted. The tunnel has a net span of 12.25m, Excavation span of 14.95m, single-span so long-span tunneling tunneling in Beijing is the first case. This paper analyzes and summarizes the key design and construction techniques of the super-large cross-section and top-wall tunnel with shallow burying.