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南浦大桥董家渡路上匝道下周一通车
2017-08-26 08:05:57 中国青年网
本报讯(记者 李蕾 通讯员 董晖)来自上海市路政部门的好消息,经过建设者57天夜以继日的奋战,南浦大桥W3匝道(董家渡路上匝道)改建工程基本完成,将于8月28日20时开放交通,比计划提前3天。
为了给外滩金融集聚带建设和滨水公共开放空间提供更便利的交通环境,结合中山南路地下通道建设,南浦大桥W3匝道接地处需要向南移约170米。市路政局会同上海市政设计研究总院开展现场排摸及踏勘,最终创造性地采用了“降8拆6”的施工方案,即“依次降低8跨桥墩高度、同时拆除6跨桥墩”,这样避免了整个匝道拆除重建,不仅缩短了工期,节约投资,还减少了对交通的影响。在施工过程中,大型机械设备及梁段拆除外运均采用夜间23时到凌晨6时的夜间施工模式,对周边居民尽量“零打扰”。
据地质勘探报告显示,W3匝道高架桥下有多达24条横穿管线,施工团队采用压密注浆的施工工艺进行地基加固,并在横穿管线周边做管套保护,防止了管线及周边土体沉降。由于轨交4号线位于匝道下方横穿桥体,工程设计施工总包单位提出了用轻型泡沫混凝土更换填土材料的方法,保护了轨交的结构安全。
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