Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Narrow space prestress steering tensioning construction method
The invention discloses a narrow space prestress steering tensioning construction method. The method comprises the steps of construction preparation, manufacturing of a steering tensioning device, installation of a prestress steel strand, concrete pouring and maintenance, installation of the steering tensioning device, installation of a jack, tensioning of a prestress beam and grouting. According to the construction method, a steering tensioning device is adopted, the tensioning device is internally provided with a hollow cavity and positioning plates with the number the same as that of designed anchorage device holes, a steel strand penetrates into the positioning cavity in the beam body end, the tensioning direction of the prestressed beam is changed through the internally-arranged positioning plates, and prestressed oblique tensioning of the prestressed beam in the narrow space is achieved; the problems that the tensioning space of the prestressed beam is insufficient, and a jack cannot be placed are solved, meanwhile, it is guaranteed that the steel strands are accurately positioned, the tensioning activity space of the steel strands is reduced, interference between the steel strands is avoided, and stress loss during tensioning is reduced; the inwards-concave positioning cavity and the protruding tensioning end of the tensioning device can be well matched and fixed with the beam body and the jack, and deviation generated by movement of the jack and the tensioning device in the tensioning process is reduced.
一种狭窄空间预应力转向张拉施工方法，其包括施工准备、制作转向张拉装置、预应力钢绞线安装、混凝土浇筑及养护、安装转向张拉装置、安装千斤顶、预应力梁张拉及灌浆几个步骤。本施工方法采用了转向张拉装置，该张拉装置内设中空腔、与设计锚具孔数相同的定位板，钢绞线从梁体端的定位腔穿入，经内设的定位板，改变预应力梁张拉方向，实现预应力梁狭窄空间预应力斜向张拉，解决了预应力梁张拉空间不足、无法放置千斤顶的问题，同时确保钢绞线定位准确，缩小了钢绞线张拉活动空间，避免钢绞线之间的干扰，减少张拉时的应力损失；张拉装置内凹的定位腔和凸出的张拉端能与梁体和千斤顶很好契合固定，减少张拉时千斤顶和张拉装置移动产生的偏移。
Narrow space prestress steering tensioning construction method
The invention discloses a narrow space prestress steering tensioning construction method. The method comprises the steps of construction preparation, manufacturing of a steering tensioning device, installation of a prestress steel strand, concrete pouring and maintenance, installation of the steering tensioning device, installation of a jack, tensioning of a prestress beam and grouting. According to the construction method, a steering tensioning device is adopted, the tensioning device is internally provided with a hollow cavity and positioning plates with the number the same as that of designed anchorage device holes, a steel strand penetrates into the positioning cavity in the beam body end, the tensioning direction of the prestressed beam is changed through the internally-arranged positioning plates, and prestressed oblique tensioning of the prestressed beam in the narrow space is achieved; the problems that the tensioning space of the prestressed beam is insufficient, and a jack cannot be placed are solved, meanwhile, it is guaranteed that the steel strands are accurately positioned, the tensioning activity space of the steel strands is reduced, interference between the steel strands is avoided, and stress loss during tensioning is reduced; the inwards-concave positioning cavity and the protruding tensioning end of the tensioning device can be well matched and fixed with the beam body and the jack, and deviation generated by movement of the jack and the tensioning device in the tensioning process is reduced.
一种狭窄空间预应力转向张拉施工方法，其包括施工准备、制作转向张拉装置、预应力钢绞线安装、混凝土浇筑及养护、安装转向张拉装置、安装千斤顶、预应力梁张拉及灌浆几个步骤。本施工方法采用了转向张拉装置，该张拉装置内设中空腔、与设计锚具孔数相同的定位板，钢绞线从梁体端的定位腔穿入，经内设的定位板，改变预应力梁张拉方向，实现预应力梁狭窄空间预应力斜向张拉，解决了预应力梁张拉空间不足、无法放置千斤顶的问题，同时确保钢绞线定位准确，缩小了钢绞线张拉活动空间，避免钢绞线之间的干扰，减少张拉时的应力损失；张拉装置内凹的定位腔和凸出的张拉端能与梁体和千斤顶很好契合固定，减少张拉时千斤顶和张拉装置移动产生的偏移。
Narrow space prestress steering tensioning construction method
一种狭窄空间预应力转向张拉施工方法
YUAN TAO (Autor:in) / DUAN YULI (Autor:in) / WANG XIANPING (Autor:in) / YUAN PINGSHUN (Autor:in) / ZHAO KEJU (Autor:in) / JIN DAXIN (Autor:in) / ZHANG SHIJIANG (Autor:in) / CHENG YAN (Autor:in) / YIN BENLIN (Autor:in) / WANG JUN (Autor:in)
30.08.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
E04G
SCAFFOLDING
,
Baugerüste
Prestress anchor bolt tensioning construction process
| Europäisches Patentamt | 2020