预应力混凝土连续箱梁裂缝成因分析及预防措施

预应力混凝土连续箱梁桥在中等、大跨径桥梁中应用广泛，但其在实际应用中还存在不少问题值得深入研究，尤其是混凝土的开裂问题。本文针对预应力混凝土连续箱梁桥在施工过程中或投入运营不久就出现较多裂缝的现象，从设计、施工及其他相关因素等原因对裂缝的成因进行分析，并提出相应的预防措施。

Cause of Formation of Cracks and Prevent Measures in PC Continuous Box Girder Bridges

Prestressed concrete continuous box girder bridges are widely used in middle and long span bridges, and will be more widely used. But there are still many problems existing worth studying deeply in practical application, especially the cracks of concrete. There are many cracks appear when the prestressed concrete continuous box girder bridges are constructing or bring into service, this article have the problem genetic analysed from design ,construction and extraneous factor, and corresponding prevent measures are brought forward in this paper.