大型近接暗挖换乘地铁车站施工关键技术

The Key Construction Technic for Large-scale Underground-excavated Metro Station

论述大型近接暗挖换乘地铁车站施工过程中超大跨隧道、近接交叉重叠隧道、狭小场地小竖井转大断面施工技术,说明其施工流程及关键技术,为了保证繁华城区大型近接暗挖换乘地铁车站工程安全顺利的完成,需要确定各个部位的施工顺序,本文结合广州地铁区庄的实施情况,对施工技术的可靠性、安全性、质量及施工效率等进行研究,通过数值模拟计算和现场量测数据,确定了最优支护结构形式及合理的开挖支护施工方案,为今后类似工程拓宽思路并提供可资借鉴的实例。

In the paper, it introduces that the key construction technic and flow of large span tunnel, crossing and overlapping tunnel, shaft-well in narrow space for large-scale underground-excavated metro station. In order to complete the large-scale underground-excavated metro station in the downtown, construction flow should be determined and the reliability, safety, and quality of the construction should be studied. Through numerical simulation and measuring in site, the best scheme for excavation and support is determined. It is helpful to similar project in the future.