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A platform for research: civil engineering, architecture and urbanism
Construction method of cast-in-cantilever large-span reinforced concrete arch bridge
The invention discloses a construction method of a cantilever casting large-span reinforced concrete arch bridge, which comprises the following steps of: firstly, casting cantilever arch ring sections by sections in bilateral symmetry by adopting a tower cable-stayed buckling and hanging casting method until an opening section of a midspan arch crown is reserved; the two ends of the stiff framework are connected with the cantilever arch ring sections on the left side and the right side through pre-embedded connecting joints correspondingly, a mixed arch structure composed of the concrete arch ring and the stiff framework is formed, finally, concrete of the stiff framework sections is poured section by section, and the stiff framework is wrapped in the concrete; therefore, a complete arch ring is formed. According to the invention, the concrete arch ring within the range of the midspan opening section does not need to adopt tower cable-stayed buckling construction, the stability risk of the tower can be greatly reduced, the engineering economy is greatly improved, and under the action of the pre-embedded connector, the stability risk of arch ring large cantilever construction can be effectively reduced, and the construction efficiency is improved. And the engineering safety and economy in the construction period are improved.
本发明公开了一种悬臂浇筑大跨径钢筋混凝土拱桥的施工方法，首先采用塔架斜拉扣挂浇筑法左右对称、分节段浇筑悬臂拱圈段，直至留出跨中拱顶的开口段落；再在开口处架设劲性骨架先行合龙，劲性骨架的两端通过预埋式连接接头分别与左、右侧的悬臂拱圈段连接，形成混凝土拱圈与劲性骨架组成的混合拱结构，最后采用分节段浇筑劲性骨架段的混凝土，将劲性骨架包裹在混凝土内，至此形成了完整的拱圈。通过该发明，可使跨中开口段落范围的混凝土拱圈无需采用塔架斜拉扣挂施工，可大大降低塔架稳定性风险，大幅提升工程经济性，并且在预埋式连接接头的作用下，可有效降低拱圈大悬臂施工的稳定性风险，增加施工期的工程安全性和经济性。
Construction method of cast-in-cantilever large-span reinforced concrete arch bridge
The invention discloses a construction method of a cantilever casting large-span reinforced concrete arch bridge, which comprises the following steps of: firstly, casting cantilever arch ring sections by sections in bilateral symmetry by adopting a tower cable-stayed buckling and hanging casting method until an opening section of a midspan arch crown is reserved; the two ends of the stiff framework are connected with the cantilever arch ring sections on the left side and the right side through pre-embedded connecting joints correspondingly, a mixed arch structure composed of the concrete arch ring and the stiff framework is formed, finally, concrete of the stiff framework sections is poured section by section, and the stiff framework is wrapped in the concrete; therefore, a complete arch ring is formed. According to the invention, the concrete arch ring within the range of the midspan opening section does not need to adopt tower cable-stayed buckling construction, the stability risk of the tower can be greatly reduced, the engineering economy is greatly improved, and under the action of the pre-embedded connector, the stability risk of arch ring large cantilever construction can be effectively reduced, and the construction efficiency is improved. And the engineering safety and economy in the construction period are improved.
本发明公开了一种悬臂浇筑大跨径钢筋混凝土拱桥的施工方法，首先采用塔架斜拉扣挂浇筑法左右对称、分节段浇筑悬臂拱圈段，直至留出跨中拱顶的开口段落；再在开口处架设劲性骨架先行合龙，劲性骨架的两端通过预埋式连接接头分别与左、右侧的悬臂拱圈段连接，形成混凝土拱圈与劲性骨架组成的混合拱结构，最后采用分节段浇筑劲性骨架段的混凝土，将劲性骨架包裹在混凝土内，至此形成了完整的拱圈。通过该发明，可使跨中开口段落范围的混凝土拱圈无需采用塔架斜拉扣挂施工，可大大降低塔架稳定性风险，大幅提升工程经济性，并且在预埋式连接接头的作用下，可有效降低拱圈大悬臂施工的稳定性风险，增加施工期的工程安全性和经济性。
Construction method of cast-in-cantilever large-span reinforced concrete arch bridge
一种悬臂浇筑大跨径钢筋混凝土拱桥的施工方法
HU JING (author) / YANG JIAN (author) / LIU JIANJUN (author) / LI YINBIN (author) / WEI DINGCHAO (author) / WAN LIN (author) / CHEN YINGGAO (author) / YE HONGPING (author) / DENG XIAOHONG (author)
2023-06-30
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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