地铁隧道暗挖施工对既有管线的变形影响规律及其控制技术

Influence of Bored Subway Tunnel Construction on the Deformation of Existing Pipelines and Control Techniques

城市地铁隧道施工中,有效保证邻近管线的安全是工程的难点之一。文章以西安地铁三号线通-胡区间为研究背景,采用FLAC数值模拟,得出了地铁隧道暗挖施工对邻近平行及垂直于隧道轴线的地下管线变形影响的规律;通过分析,预测了地铁穿越地裂缝施工后管线的变形趋势,并提出了地铁隧道下穿f4地裂缝的技术措施,以及地铁暗挖施工中对邻近管线的保护措施。工程实践表明,文章提出的控制措施合理有效。

It is critical to guarantee the safety of adjacent pipelines during the construction of an urban subway tunnel. Using the Tonghuamen-Hujiamiao section of Xi＇an Metro Line 3 as an example, a FLAC numerical simulation was used to obtain the law of influence of bored subway tunnel construction on the deformation of adjacent pipelines that are parallel or perpendicular to the tunnel axis. The deformation tendency of pipelines after the subway passed through the f4 ground fissure was analyzed and predicted, and the technical measures for a subway tunnel passing through the f4 ground fissure, as well as the protective measures for adjacent pipelines, were put presented. The engineering practices show that the control measures proposed in this paper were reasonable and effective.