A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Tensioning method for vertical prestressed steel strand of concrete continuous beam
The invention relates to a method for tensioning a vertical prestressed steel strand of a concrete continuous beam, which comprises the following steps of: during primary tensioning, sleeving a steel sleeve on the prestressed steel strand between a tensioning jack and a tool anchor so as to improve the biting mark position of the tool anchor on the steel strand; and during secondary tensioning, the steel sleeve is taken down, a tensioning support is arranged below the tensioning jack, it is guaranteed that a bite mark generated on the steel strand during primary tensioning is located above the tool anchor, the tensioning jack pushes the tool anchor upwards, and secondary tensioning is completed. According to the secondary tensioning device, the phenomenon that the steel strand is broken during secondary tensioning can be avoided, and the secondary tensioning quality is guaranteed.
本发明涉及一种混凝土连续梁竖向预应力钢绞线张拉方法，一次张拉时，在张拉千斤顶与工具锚之间的预应力钢绞线上套设一钢套筒，以提高工具锚在钢绞线上的咬痕位置；二次张拉时，取下钢套筒，在张拉千斤顶下方设置张拉支架，并保证一次张拉时钢绞线上产生的咬痕位于工具锚上方，张拉千斤顶向上顶推工具锚，完成二次张拉。本发明能避免二次张拉时钢绞线断丝现象，保证二次张拉质量。
Tensioning method for vertical prestressed steel strand of concrete continuous beam
The invention relates to a method for tensioning a vertical prestressed steel strand of a concrete continuous beam, which comprises the following steps of: during primary tensioning, sleeving a steel sleeve on the prestressed steel strand between a tensioning jack and a tool anchor so as to improve the biting mark position of the tool anchor on the steel strand; and during secondary tensioning, the steel sleeve is taken down, a tensioning support is arranged below the tensioning jack, it is guaranteed that a bite mark generated on the steel strand during primary tensioning is located above the tool anchor, the tensioning jack pushes the tool anchor upwards, and secondary tensioning is completed. According to the secondary tensioning device, the phenomenon that the steel strand is broken during secondary tensioning can be avoided, and the secondary tensioning quality is guaranteed.
本发明涉及一种混凝土连续梁竖向预应力钢绞线张拉方法，一次张拉时，在张拉千斤顶与工具锚之间的预应力钢绞线上套设一钢套筒，以提高工具锚在钢绞线上的咬痕位置；二次张拉时，取下钢套筒，在张拉千斤顶下方设置张拉支架，并保证一次张拉时钢绞线上产生的咬痕位于工具锚上方，张拉千斤顶向上顶推工具锚，完成二次张拉。本发明能避免二次张拉时钢绞线断丝现象，保证二次张拉质量。
Tensioning method for vertical prestressed steel strand of concrete continuous beam
一种混凝土连续梁竖向预应力钢绞线张拉方法
CHEN QIANG (author) / WANG QUANQING (author) / ZHANG KUI (author) / YI GUILIN (author) / WU HANGXIANG (author)
2022-07-08
Patent
Electronic Resource
Chinese
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