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Tricky Sewer Excavation In Saginaw, MI

机译：密西根州萨吉诺的棘手的下水道发掘

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Recently, American Excavating Ltd., headquartered in Saginaw, Ml, was low bidder on a project for the city of Saginaw to construct a new cast-in-place concrete bypass chamber to combine a 60 and 90-inch diameter combination sewer. The project also included blocking-off the 60-inch sewer downstream in order to eliminate an abandoned manufacturing site's storm water from continuing to run into the city's combined sewer system and treatment plant. The challenge for American was the need to excavate and expose both pipes which run parallel but at slightly different grades, then set up a system to support the concrete lines in order to dig out below the inverse of both pipes, and finally cast-in-place a new bypass junction chamber tying the two lines together. Of course, American needed to safely shore a pit that would encompass all of the above.
机译：最近，总部位于密歇根州萨吉诺的American Excavating Ltd.对萨吉诺市的一个项目进行了低价竞标，该项目是建造一个新的现浇混凝土旁路室，以结合一个60英寸和90英寸直径的组合下水道。该项目还包括封锁下游的60英寸下水道，以消除废弃的制造厂的雨水继续流入该城市的下水道系统和污水处理厂。对于美国人而言，面临的挑战是需要挖掘和露出平行运行但等级略有不同的两条管道，然后建立一个支撑混凝土管线的系统，以便在两条管道的反面下方挖出，最后浇铸成-放置一个新的旁路连接室，将两条管线绑在一起。当然，美国人需要安全地支撑一个涵盖以上所有内容的坑。

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