A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction method of steel-concrete composite beam
The invention provides a construction method of a steel-concrete composite beam, which comprises the following steps: transporting steel beam sections to a construction site, and starting to erect steel beams after site assembly is completed; after the steel beam is erected, the middle supporting point of the composite beam is jacked by a first height through jacking equipment; binding concrete bridge deck slab reinforcing steel bars, laying retard-bonded prestressed steel strands, pouring composite beam bridge deck slab concrete, and maintaining the composite beam bridge deck slab concrete; after the concrete of the concrete bridge deck slab reaches the design strength, the retard-bonded prestressed steel strand is tensioned, and anchoring is conducted after the design stress of the retard-bonded prestressed steel strand is reached; and before curing of the retard-bonded prestressed steel strand is completed, the middle fulcrum of the steel-concrete composite beam falls onto a formal support, and construction of the steel-concrete composite beam is completed. According to the invention, the bonded prestressed steel strand is replaced by the retard-bonded prestressed steel strand, so that the stress loss at the middle fulcrum can be reduced, and the stress distribution of the hogging moment area is more uniform.
本发明提供一种钢‑混组合梁的施工方法，包括：将钢梁节段运输至施工现场，现场拼装完成后开始架设钢梁；钢梁架设完毕后，利用顶升设备将组合梁中支点顶升第一高度；绑扎混凝土桥面板钢筋，布设缓粘结预应力钢绞线，浇筑组合梁桥面板混凝土并养护；待混凝土桥面板的混凝土达到设计强度后开始张拉缓粘结预应力钢绞线，达到缓粘结预应力钢绞线设计应力后锚固；在缓粘结预应力钢绞线固化前完成前，将钢‑混组合梁中支点下落到正式支座上，完成钢‑混组合梁施工。本发明通过将粘结预应力钢绞线更换为缓粘结预应力钢绞线可减少中支点处的应力损失，使负弯矩区应力分布更加均匀。
Construction method of steel-concrete composite beam
The invention provides a construction method of a steel-concrete composite beam, which comprises the following steps: transporting steel beam sections to a construction site, and starting to erect steel beams after site assembly is completed; after the steel beam is erected, the middle supporting point of the composite beam is jacked by a first height through jacking equipment; binding concrete bridge deck slab reinforcing steel bars, laying retard-bonded prestressed steel strands, pouring composite beam bridge deck slab concrete, and maintaining the composite beam bridge deck slab concrete; after the concrete of the concrete bridge deck slab reaches the design strength, the retard-bonded prestressed steel strand is tensioned, and anchoring is conducted after the design stress of the retard-bonded prestressed steel strand is reached; and before curing of the retard-bonded prestressed steel strand is completed, the middle fulcrum of the steel-concrete composite beam falls onto a formal support, and construction of the steel-concrete composite beam is completed. According to the invention, the bonded prestressed steel strand is replaced by the retard-bonded prestressed steel strand, so that the stress loss at the middle fulcrum can be reduced, and the stress distribution of the hogging moment area is more uniform.
本发明提供一种钢‑混组合梁的施工方法，包括：将钢梁节段运输至施工现场，现场拼装完成后开始架设钢梁；钢梁架设完毕后，利用顶升设备将组合梁中支点顶升第一高度；绑扎混凝土桥面板钢筋，布设缓粘结预应力钢绞线，浇筑组合梁桥面板混凝土并养护；待混凝土桥面板的混凝土达到设计强度后开始张拉缓粘结预应力钢绞线，达到缓粘结预应力钢绞线设计应力后锚固；在缓粘结预应力钢绞线固化前完成前，将钢‑混组合梁中支点下落到正式支座上，完成钢‑混组合梁施工。本发明通过将粘结预应力钢绞线更换为缓粘结预应力钢绞线可减少中支点处的应力损失，使负弯矩区应力分布更加均匀。
Construction method of steel-concrete composite beam
一种钢-混组合梁的施工方法
LIU YANG (author) / LI JUN (author) / HU ZHEN (author) / ZHU MENGJUN (author) / YU HAITANG (author) / WANG XIAOFENG (author) / ZHAI FENG (author) / CHEN WEICHAO (author) / XU YAN (author) / CHEN ZHICHUN (author)
2023-03-28
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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