连续刚构桥以其跨越能力大、施工方便、造价低等优势在桥梁结构中被广泛采用。但大跨径预应力混凝土连续钢构箱梁在运营过程中跨中过大下挠,已成为该类结构的一个非常普遍且非常严重的病害之一。本文以某省某预应力混凝土连续刚构桥为工程实例,针对目前大跨连续刚构较普遍存在的跨中下挠问题,分析研究其影响因素,并提出切实可行的防治措施。 Continuous rigid frame bridge with its large capacity, easy construction, low cost and other advantages in the bridge structure is widely used. However, large-span prestressed concrete continuous steel box girder over-mid-span deflection during operation has become a very common and very serious disease of such structures. In this paper, a certain prestressed concrete continuous rigid frame bridge in a province as an example, aiming at the more common mid-span deflection problem of long-span continuous rigid frame, the influencing factors are analyzed and the feasible control measures are put forward.