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1 概述随着科学技术的飞速发展,国家对基础设施投入逐步增大,跨径较大的预应力砼梁板普遍应用于工程中,且较多采用后张法预应力。为此,笔者根据多次施工经历,简要介绍后张法预应力砼梁板施工工艺。后张法预施应力是待砼梁板达到规定的强度后,在预留孔道中穿入预应力筋,用机械张拉,使预应力筋对砼梁板施加应力。这是一项十分重要的工作,施加预应力过多或不足,都会影响到梁板的质量,必须按设计要求,进行准确地施加预应力。桥梁工程使用的预制梁板,施加预应力的方
1 Overview With the rapid development of science and technology, the state has gradually increased investment in infrastructure, large-span prestressed concrete beams commonly used in engineering, and more post-tensioned prestressed. To this end, the author based on multiple construction experience, a brief introduction of post-tensioned prestressed concrete beam construction process. Post-tension method Prestress is to be concrete beams to the required strength, the prefabricated in the pre-pierced holes into the channel, with mechanical tension, so that prestressed tendons on the concrete beam stress. This is a very important task. If too much or too little prestressing force is applied, the quality of the slab will be affected. The prestressing force must be accurately applied according to the design requirements. Prefabricated beams used in bridge engineering, prestressed square