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中环线浦东段新建工程3标地处上海浦东济阳路段,轨道交通6号线及规划中的轨道交通11号线均穿过该工程,其中济阳路跨线桥中部分墩台与轨道交通盾构结构最近距离仅2.903m,地铁所属单位对距离盾构结构外边线距离小于10m的桩基要求进行深护筒施工。地铁运营时所产生的震动对钻孔灌注桩护壁质量会产生较大影响,可能造成蹋孔,这样就存在对轨道交通的盾构结构产生安全隐患,所以深护筒施工必须在地铁停运期间施工。
Central Line Pudong section of the new project 3 is located in Shanghai Pudong Jiyang section, Metro Line 6 and the planned rail transit Line 11 are through the project, including Jiyang Road flyover bridge and rail transit The nearest distance of the shield structure is only 2.903m. The subordinate units are required to carry out the deep protection tube construction for pile foundations less than 10m away from the outer edge of the shield structure. The vibrations generated during the subway operation will have a significant impact on the quality of the bored pile wall, which may cause craters, which may cause potential safety hazard for the rail transit shield structure. Therefore, construction.