A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction method of low-pier large-cantilever double-amplitude integral prestressed bent cap
The invention relates to the technical field of integral bent cap construction of bridge engineering, in particular to a construction method of a low-pier large-cantilever double-amplitude integral prestressed bent cap, which comprises the following steps of: preparing before erecting a support frame, performing site hardening on the original ground by adopting concrete in the range of the support frame, and adopting a disc buckle type full scaffold support matched with square timber, primary cross beams and secondary cross beams as the support frame; vertical rods of the scaffold support are transversely and longitudinally arranged, the vertical rods are matched with a top and a bottom support to adjust the height of the support, the bottom support is arranged on channel steel, square timber is arranged on the top support to serve as a main cross beam, square timber is transversely arranged on the main cross beam to serve as a secondary cross beam, and the secondary cross beam serves as a back ridge of a bent cap bottom die; diagonal bracings are arranged on the front and side surfaces of the bracket; and the cover beam adopts a post-tensioned prestressed cover beam and is tensioned for three times. Three-time tensioning is adopted, the bearing capacity of the cover beam is effectively enhanced, it can be guaranteed that underground obstacles such as petroleum pipelines can be smoothly avoided on the premise that the upper structure meets the bearing requirement, and safety can be effectively guaranteed.
本发明涉及桥梁工程整体式盖梁施工技术领域，特别是涉及一种低墩大悬臂双幅整体式预应力盖梁的施工方法，支撑架搭设前准备，支架范围内先对原地面采用砼进行场地硬化，采用盘扣式满堂脚手支架配以方木、主次横梁作为支撑架，脚手支架的立杆横、纵向布设，立杆配顶、底托调节支架高度，底托布设在槽钢上，顶托上布设方木作为主横梁，主横梁上横向布设方木作为次横梁，次横梁做盖梁底模的背楞；支架正面、侧面设置剪刀撑；盖梁采用后张法预应力盖梁，分三次张拉。本发明采用三次张拉，有效加强了盖梁的承载能力，能够保证在上部结构达到承载要求的前提下，顺利避开石油管道等地下障碍物，安全性能够得到有效保障。
Construction method of low-pier large-cantilever double-amplitude integral prestressed bent cap
The invention relates to the technical field of integral bent cap construction of bridge engineering, in particular to a construction method of a low-pier large-cantilever double-amplitude integral prestressed bent cap, which comprises the following steps of: preparing before erecting a support frame, performing site hardening on the original ground by adopting concrete in the range of the support frame, and adopting a disc buckle type full scaffold support matched with square timber, primary cross beams and secondary cross beams as the support frame; vertical rods of the scaffold support are transversely and longitudinally arranged, the vertical rods are matched with a top and a bottom support to adjust the height of the support, the bottom support is arranged on channel steel, square timber is arranged on the top support to serve as a main cross beam, square timber is transversely arranged on the main cross beam to serve as a secondary cross beam, and the secondary cross beam serves as a back ridge of a bent cap bottom die; diagonal bracings are arranged on the front and side surfaces of the bracket; and the cover beam adopts a post-tensioned prestressed cover beam and is tensioned for three times. Three-time tensioning is adopted, the bearing capacity of the cover beam is effectively enhanced, it can be guaranteed that underground obstacles such as petroleum pipelines can be smoothly avoided on the premise that the upper structure meets the bearing requirement, and safety can be effectively guaranteed.
本发明涉及桥梁工程整体式盖梁施工技术领域，特别是涉及一种低墩大悬臂双幅整体式预应力盖梁的施工方法，支撑架搭设前准备，支架范围内先对原地面采用砼进行场地硬化，采用盘扣式满堂脚手支架配以方木、主次横梁作为支撑架，脚手支架的立杆横、纵向布设，立杆配顶、底托调节支架高度，底托布设在槽钢上，顶托上布设方木作为主横梁，主横梁上横向布设方木作为次横梁，次横梁做盖梁底模的背楞；支架正面、侧面设置剪刀撑；盖梁采用后张法预应力盖梁，分三次张拉。本发明采用三次张拉，有效加强了盖梁的承载能力，能够保证在上部结构达到承载要求的前提下，顺利避开石油管道等地下障碍物，安全性能够得到有效保障。
Construction method of low-pier large-cantilever double-amplitude integral prestressed bent cap
低墩大悬臂双幅整体式预应力盖梁的施工方法
OU LIN (author) / ZHANG HONGWANG (author) / LI XIAOJIE (author) / WANG HUIJIA (author) / LI YUTAO (author) / CHEN JINZONG (author) / SUN LONGBIAO (author)
2023-09-29
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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