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This paper introduces the construction techniques of U shaped caisson of main pier of Huanghe bridge on Yingu expressway. 本文介紹銀古高速公路三標(biāo)黃河特大橋（拓寬工程）主墩承臺U型沉井施工技術(shù)，重點介紹沉井下沉施工及糾偏方法。