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结合二次预应力组合梁的基本原理及特点,分析二次预应力组合梁现有施工技术存在的问题,即模板安装支护、混凝土浇筑、预应力筋张拉锚固困难而复杂,施工工序增加;针对这些问题,研究开发了两种连接器专利产品,一种是双套筒预应力钢筋套管连接器,可以方便地实现一期混凝土中预应力筋套管和二期混凝土中预应力筋套管的连接;另一种是双层套筒钢筋连接器,可以方便地实现一期混凝土中纵向钢筋和二期混凝土中纵向钢筋的连接,从而有效解决二次预应力组合梁现有施工技术存在的问题,提高二次预应力组合梁的技术水平。
Combined with the basic principle and characteristics of the second prestressed composite beam, the existing problems of the existing construction technology of the second prestressed composite beam are analyzed. It is difficult and complicated to set up and support the concrete formwork, pour concrete and prestress tendons, and the construction procedure is increased In response to these problems, two kinds of connector patented products have been researched and developed. One is a double-sleeve prestressed reinforced casing connector, which can be used to easily achieve the first-stage prestressed concrete casing and the second-stage prestressed concrete Casing connection; the other is a double-layer sleeve reinforced connector, can be easily achieved in the first phase of concrete longitudinal reinforcement and concrete in the second phase of the connection to effectively solve the second prestressed composite beams of existing construction techniques Existing problems, improve the technical level of the second prestressed composite beam.