In cantilever construction, the demands of construction quality are high, the construction processes are numerous, and the affecting factors for the quality of construction are also numerous. In view of the construction of bridge upper box girder, the paper analyzes the quality control in the construction of prestressed concrete box girder.%悬臂施工质量要求高，施工工序很多，影响施工质量的因素也很多。本文就桥梁上部箱梁的施工，浅析预应力箱梁悬臂施工的质量控制。
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