It is analyzed that in the constructing of reinforced concrete hollowcore slab and girder by post tensioning prestress method,temperature stress is the main reason of visible cracks arising.

• 分析了在后张法预应力钢筋混凝土空心板梁施工中,温度应力是预制梁出现“可见裂缝”的主要原因,干缩引起的微细裂缝对“可见裂缝”的出现具有一定的影响,并提出预防措施。