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2.1项目概况:本工程新建7000*7000钢筋砼沉井1座,新建7000*5500钢筋砼沉井1座;新建 D2000钢筋砼顶管52.9m,新建D2400钢筋砼顶管110.8m;具体详见工程量清单及图纸。