Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
On-site prestress tensioning method and tensioning device for super-large cable group
The invention discloses an on-site prestress tensioning method for a super-large cable group, which comprises the following steps of: firstly, performing simulation analysis and checking calculation on a construction process of a large-span cable-supported truss structure and a tensioning process of a cable group in the structure, and determining a control cable force of each tensioning batch and a cable force in a tensioning final state; meanwhile, proper tensioning equipment is selected according to the cable force; secondly, a supporting jig frame is erected, a main structure and a cable body are installed, and after the main structure and the cable body are installed, a peripheral jig frame is dismantled; then, all the cable bodies are graded in batches, tensioning is conducted in sequence according to the length of the cable bodies from small to large, and after tensioning is completed, tensioning is conducted in sequence according to the length of the cable bodies from large to small; and after the cable force meets the design requirement, tensioning is completed, and the remaining jig frame is detached. The prestressed cable is tensioned in a positive sequence and then in a reverse sequence in batches and stages, so that the construction efficiency is improved, the cable force loss in the tensioning process is greatly reduced, the influence of tensioning on a built structure is reduced, and the reliability of a main body structure after being put into use is ensured.
本发明公开了一种超大索群现场预应力张拉方法，首先，对大跨度索承桁架结构建造过程和结构中索群的张拉过程进行模拟分析和验算，确定各个张拉批次的控制索力和张拉终态的索力；同时，根据索力选取合适张拉设备；其次，搭设支撑胎架，进行主结构及索体的安装，待主结构和索体安装完成后，拆除外围胎架；然后，对所有的索体进行分批分级，依次按照索体长度从小到大的顺序进行张拉，张拉完成后，再依次按照索体长度从大到小的顺序进行张拉；当索力达到设计要求后完成张拉，拆除剩余胎架。通过分批分级先正序后逆序张拉预应力索，提升了施工效率，大大减小了张拉过程中索力损失，从而减小张拉对已建成结构的影响，确保了主体结构投入使用后的可靠性。
On-site prestress tensioning method and tensioning device for super-large cable group
The invention discloses an on-site prestress tensioning method for a super-large cable group, which comprises the following steps of: firstly, performing simulation analysis and checking calculation on a construction process of a large-span cable-supported truss structure and a tensioning process of a cable group in the structure, and determining a control cable force of each tensioning batch and a cable force in a tensioning final state; meanwhile, proper tensioning equipment is selected according to the cable force; secondly, a supporting jig frame is erected, a main structure and a cable body are installed, and after the main structure and the cable body are installed, a peripheral jig frame is dismantled; then, all the cable bodies are graded in batches, tensioning is conducted in sequence according to the length of the cable bodies from small to large, and after tensioning is completed, tensioning is conducted in sequence according to the length of the cable bodies from large to small; and after the cable force meets the design requirement, tensioning is completed, and the remaining jig frame is detached. The prestressed cable is tensioned in a positive sequence and then in a reverse sequence in batches and stages, so that the construction efficiency is improved, the cable force loss in the tensioning process is greatly reduced, the influence of tensioning on a built structure is reduced, and the reliability of a main body structure after being put into use is ensured.
本发明公开了一种超大索群现场预应力张拉方法，首先，对大跨度索承桁架结构建造过程和结构中索群的张拉过程进行模拟分析和验算，确定各个张拉批次的控制索力和张拉终态的索力；同时，根据索力选取合适张拉设备；其次，搭设支撑胎架，进行主结构及索体的安装，待主结构和索体安装完成后，拆除外围胎架；然后，对所有的索体进行分批分级，依次按照索体长度从小到大的顺序进行张拉，张拉完成后，再依次按照索体长度从大到小的顺序进行张拉；当索力达到设计要求后完成张拉，拆除剩余胎架。通过分批分级先正序后逆序张拉预应力索，提升了施工效率，大大减小了张拉过程中索力损失，从而减小张拉对已建成结构的影响，确保了主体结构投入使用后的可靠性。
On-site prestress tensioning method and tensioning device for super-large cable group
一种超大索群现场预应力张拉方法及张拉装置
SHI LEI (Autor:in) / HAN YU (Autor:in) / WANG BO (Autor:in) / SUN JINBIAO (Autor:in) / SUN KAI (Autor:in)
13.02.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
E04G
SCAFFOLDING
,
Baugerüste