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YC—60千斤顶在预应力混凝土施工时主要用于张拉粗钢筋、钢筋束和钢绞线,由于它具有较大的通用性,是现有各种张拉千斤顶中较受欢迎的一种。近年来,随着生产任务的变化,YC—60千斤顶的应用受到了一定影响,其主要原因是预应力钢材由Ⅱ、Ⅲ、Ⅳ级钢筋发展到大量使用高强钢丝等高强材料。在采用高强钢丝作预应力配筋的各种张拉工艺中,普遍采用弗氏千斤顶(国内称三
YC-60 jacks are mainly used for tensioning reinforcing bars, tendons and steel strands in the construction of prestressed concrete. Due to its greater versatility, YC-60 jacks are the more popular ones among existing tensioning jacks. In recent years, with the change of production tasks, the application of YC-60 jacks has been affected to a certain extent, mainly due to the development of prestressed steel grades II, III, IV and the use of high-strength steel materials such as high-strength steel wires. In various tensioning processes using high-strength steel wire as pre-stressed reinforcement, Freund’s jacks are commonly used (