邻近既有地铁深基坑工程安全性评价与防控

Safety Evaluation and Protection of Existing Subway under the Influence of Deep Foundation Pit Engineering

为减小新建工程对轨道交通设施的影响,以新建道路工程穿越既有地铁设施为研究对象,采用数值模拟、理论计算及现场监测等方法,研究了穿越工程对隧道结构安全性影响程度,提出了采用桩锚支护方式对新建基坑进行加固并对地铁隧道进行实时变形监测,研究结果表明:采用桩锚支护方式对基坑进行加固后隧道结构保持在稳定状态。

In order to reduce the impact of new projects on rail transit facilities,the paper takes the new road project crossing the existing subway facilities as the research object,numerical simulation,theoretical calculation and on-site monitoring are used to study the impact of the crossing engineering on the safety of the tunnel structure,and the pile-anchor support is put forward to reinforce the newly build fundation pit and monitor deformation of subway tunnel in real-time. The research results show that:after the fundation pit is reinforced by pile-anchor support,the tunnel structure keeps in a stable state.