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A platform for research: civil engineering, architecture and urbanism
Prestressed construction method for railway continuous beam
The invention discloses a prestressed construction method for a railway continuous beam. A construction sequence of double-end tensioning of a front construction beam and single-end tensioning of a rear construction beam is adopted, and a prestressed system that prestressed steel strands of the front beam and the rear beam are lengthened through a connector preset in the front beam is adopted, so that the prestressed loss is effectively reduced. An integrated connector is reserved at the end of a front construction beam in a pre-buried fixing mode, steel strand penetrating and extrusion head manufacturing of the rear construction beam can be synchronously carried out when pre-stress tensioning of the front construction beam is carried out, and finally a connecting method of hanging on the connector is adopted, so that the lengthening efficiency of the pre-stress steel strand bundle is improved, the pre-stress reserving effect is guaranteed, and the problems that an existing prestressed tendon lengthening method is complex in procedure and low in construction efficiency are effectively solved.
本发明公开了一种铁路连续梁预应力施工方法，采用前施工梁双端张拉，后施工梁再单端张拉的施工顺序，并通过预设在前梁中的连接器将前后梁的预应力钢绞线束进行接长的预应力体系，有效减少了预应力损失，一体式连接器采用预埋的固定方式保留在前施工梁端部，在进行前施工梁预应力张拉的用时可同步进行后施工梁钢绞线穿束以及挤压头制作，最后采用挂载于连接器的连接方法，提高了预应力钢绞线束接长效率，保证了预应力保留效果，有效解决了现有预应力筋接长方法工序复杂和施工效率低的问题。
Prestressed construction method for railway continuous beam
The invention discloses a prestressed construction method for a railway continuous beam. A construction sequence of double-end tensioning of a front construction beam and single-end tensioning of a rear construction beam is adopted, and a prestressed system that prestressed steel strands of the front beam and the rear beam are lengthened through a connector preset in the front beam is adopted, so that the prestressed loss is effectively reduced. An integrated connector is reserved at the end of a front construction beam in a pre-buried fixing mode, steel strand penetrating and extrusion head manufacturing of the rear construction beam can be synchronously carried out when pre-stress tensioning of the front construction beam is carried out, and finally a connecting method of hanging on the connector is adopted, so that the lengthening efficiency of the pre-stress steel strand bundle is improved, the pre-stress reserving effect is guaranteed, and the problems that an existing prestressed tendon lengthening method is complex in procedure and low in construction efficiency are effectively solved.
本发明公开了一种铁路连续梁预应力施工方法，采用前施工梁双端张拉，后施工梁再单端张拉的施工顺序，并通过预设在前梁中的连接器将前后梁的预应力钢绞线束进行接长的预应力体系，有效减少了预应力损失，一体式连接器采用预埋的固定方式保留在前施工梁端部，在进行前施工梁预应力张拉的用时可同步进行后施工梁钢绞线穿束以及挤压头制作，最后采用挂载于连接器的连接方法，提高了预应力钢绞线束接长效率，保证了预应力保留效果，有效解决了现有预应力筋接长方法工序复杂和施工效率低的问题。
Prestressed construction method for railway continuous beam
一种铁路连续梁预应力施工方法
ZHENG JINPU (author) / YU ZHAOYANG (author) / TIAN YONGYIN (author) / ZHAI JIANGUO (author) / WANG XIUPENG (author) / MA WEIPING (author) / LI WENTONG (author) / LIANG PEIKE (author)
2021-09-17
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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