承压富水砂土地铁下穿既有桥梁施工技术研究

Analysis on Technology of Confined Water Rich Sandy Land Iron through Existing Bridge Construction

为确保双井车站区间隧道下穿双井桥施工的安全,对确定的施工方案的安全性及加固措施的效果进行分析,研究其对运营桥梁的影响,满足桥梁变形控制值的要求,根据双井桥具体情况,提出了隧道穿越桥梁施工的控制技术,经济、快速、保质保量完成了"北京市五个最难工程之一"的北京地铁7号线六标段工程的施工。

In order to ensure that the Shuangjing station tunnel safety, this paper analysis and reinforcement measures on the construction scheme of the effect, study on its effect on the operation of the bridge, meet the value requirements, according to the Shuangjing bridge tunnel concrete conditions, proposes control technology of tunnel crossing, it complete ＂one of the five most difficult project＂ of Beijing Metro Line 7six bids engineering.