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Construction method of full-suspension segmental beam
The invention discloses a construction method of a full-suspension segmental beam, which is characterized by comprising the following steps of: providing a segmental beam; a hoisting crown block of the bridge girder erection machine lifts the segmental girder, and after the segmental girder is lifted in place, a suspender of the bridge girder erection machine is adopted to suspend the segmental girder; sequentially mounting to complete the assembly of the whole collapse segmental beam; and external pre-stress tensioning is conducted, part of pre-stress is tensioned firstly, then constraint of the suspender of the bridge girder erection machine on the segmental girder is relieved, then the remaining part of pre-stress is tensioned, and span crossing of the bridge girder erection machine is completed in the tensioning process. According to the construction method of the full-suspension segmental beam, the tensile stress of the suspender of the bridge girder erection machine to the segmental beam is reduced, the pressure stress of the beam body is reduced, the structure is safer, the construction risk in the installation process is reduced, secondary tensioning and span crossing of the bridge girder erection machine can be carried out synchronously, the construction period is shortened, and the installation efficiency of the segmental beam is improved; the application field of installation of the full-suspension segmental beam is widened, the construction cost is reduced, and remarkable social benefits and economic benefits are achieved.
本发明公开了一种全悬挂节段梁的施工方法，其特征在于，包括以下步骤：提供节段梁；架桥机的起重天车提升节段梁，节段梁提升到位后，采用架桥机的吊杆悬挂节段梁；依次安装完成整垮节段梁的拼装；进行体外预应力张拉，先张拉部分预应力，然后解除架桥机吊杆对节段梁的约束，然后张拉剩余部分预应力，并在张拉过程中完成架桥机的过跨。上述全悬挂节段梁的施工方法，减少了架桥机吊杆对节段梁的拉应力，减小了梁体压应力，使结构更安全，降低了安装过程中的施工风险，第二次的张拉与架桥机过跨可同步进行，缩短了施工工期，提高了节段梁的安装效率，拓宽了全悬挂节段梁安装的应用领域，降低了施工成本，具有显著的社会效益和经济效益。
Construction method of full-suspension segmental beam
The invention discloses a construction method of a full-suspension segmental beam, which is characterized by comprising the following steps of: providing a segmental beam; a hoisting crown block of the bridge girder erection machine lifts the segmental girder, and after the segmental girder is lifted in place, a suspender of the bridge girder erection machine is adopted to suspend the segmental girder; sequentially mounting to complete the assembly of the whole collapse segmental beam; and external pre-stress tensioning is conducted, part of pre-stress is tensioned firstly, then constraint of the suspender of the bridge girder erection machine on the segmental girder is relieved, then the remaining part of pre-stress is tensioned, and span crossing of the bridge girder erection machine is completed in the tensioning process. According to the construction method of the full-suspension segmental beam, the tensile stress of the suspender of the bridge girder erection machine to the segmental beam is reduced, the pressure stress of the beam body is reduced, the structure is safer, the construction risk in the installation process is reduced, secondary tensioning and span crossing of the bridge girder erection machine can be carried out synchronously, the construction period is shortened, and the installation efficiency of the segmental beam is improved; the application field of installation of the full-suspension segmental beam is widened, the construction cost is reduced, and remarkable social benefits and economic benefits are achieved.
本发明公开了一种全悬挂节段梁的施工方法，其特征在于，包括以下步骤：提供节段梁；架桥机的起重天车提升节段梁，节段梁提升到位后，采用架桥机的吊杆悬挂节段梁；依次安装完成整垮节段梁的拼装；进行体外预应力张拉，先张拉部分预应力，然后解除架桥机吊杆对节段梁的约束，然后张拉剩余部分预应力，并在张拉过程中完成架桥机的过跨。上述全悬挂节段梁的施工方法，减少了架桥机吊杆对节段梁的拉应力，减小了梁体压应力，使结构更安全，降低了安装过程中的施工风险，第二次的张拉与架桥机过跨可同步进行，缩短了施工工期，提高了节段梁的安装效率，拓宽了全悬挂节段梁安装的应用领域，降低了施工成本，具有显著的社会效益和经济效益。
Construction method of full-suspension segmental beam
全悬挂节段梁的施工方法
ZHAO GUICHUAN (author) / ZHAO ZHIFENG (author) / WANG ZHEN (author) / SU HONGTAO (author) / ZHAO ZANJIE (author) / ZHANG BINGTAO (author) / ZHOU MINGXUAN (author) / YANG CHUAN (author) / WANG RUI (author) / LYU HONGRUI (author)
2024-07-09
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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