地铁暗挖车站下穿既有地铁隧道变形控制关键技术

根据北京地铁9号线军事博物馆车站下穿既有地铁1号线具体特点,通过模拟计算了解既有结构变形规律,针对既有结构变形采取有效的控制措施,结合监控量测,信息化施工,通过主动控制引起变形发生、发展的因素,严格控制既有地铁结构的变形不大于3 mm,满足了既有线变形控制指标。

Key Deformation Control Technology Regarding a Mined Underground Metro Station Crossing below an Existing Metro Tunnel

This thesis studied the case of Junshibowuguan Station of Beijing Metro Line 9 crossing below the existing Beijing Metro Line 1. Meanwhile, based on specific characteristic of the case, the deformation pattern of the existing structure was calculated by means of numerical simulation. And then,some effective deformation control measures were adopted for the existing structure. Moreover,in combination with monitoring and measurement method,and with information-aided construction method,the main factors that would cause or develop the deformation of the existing structure were managed by the use of active controlling. As a result,the deformation of the existing structure can be controlled within the range of 3 mm strictly,satisfying the requirement on deformation controlling of an existing metro line.