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Sarah Mildred Long Bridge Replacement – Two States, Three Bridges in One

机译:萨拉·米尔德雷德(Sarah Mildred)的长桥更换-两种状态,三座桥梁合而为一

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Construction is underway to replace the Sarah Mildred Long Bridge that crosses the Piscataqua Riverbetween Kittery, Maine and Portsmouth, New Hampshire. This project has used the Construction Manager /General Contractor (CM/GC) contract delivery method. The new crossing includes vehicular approach bridgesover railroad approach bridges consisting of precast segmental concrete box girders constructed by the balancedcantilever method. The approach bridges lead to a movable lift span bridge over the navigation channel. Bridgesubstructure units consist of cast-in-place reinforced concrete approach bridge piers founded on a combination ofspread footings and drilled shafts along with precast concrete lift span towers constructed on drilled shaftfoundations.
机译:正在建设中,以取代穿越Piscataqua河的Sarah Mildred长桥 在缅因州的基特里(Kittery)和新罕布什尔州的朴茨茅斯之间。该项目使用了施工经理/ 总承包商(CM / GC)合同交付方式。新的过境点包括车辆进近桥 铁路引桥,由预制的分段混凝土箱形梁组成,由平衡杆构成 悬臂法。进近桥通向导航通道上方的可移动升程跨度桥。桥 下部结构单元由现浇钢筋混凝土引桥桥墩组成,该桥墩基于 扩建基础和钻孔竖井,以及在钻孔竖井上建造的预制混凝土举升跨度塔 基础。

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