The PaPer briefly describes tyPical diseases tyPes of large-sPan Prestressed concrete bridge,and analyzes major bridge cracking and de-flection causes from asPects of Prestress layout forms,temPerature and concrete shrinkage,which has Provided some guidance for controlling bridge diseases.%简述了大跨径预应力混凝土桥梁的典型病害类型，从预应力布置形式、温度、混凝土收缩徐变等方面，分析了桥梁裂缝以及下挠的主要原因，为控制桥梁病害的发生提供了依据。
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