钢管混凝土劲性骨架拱桥拱肋施工控制研究

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Abstract Research purposes: In the large-span CFST stiff skeleton arch bridge, the stiff skeleton installation alignment directly affects the arch alignment. And if it is not controlled properly, it may even cause difficulties in the arch rib closure. Based on the project example of Yelang River Bridge, by the simulation analysis of the whole process of cantilever erection of arch ribs with cable-stayed buckle-hanging method, combined with the on-site internal force and real-time monitoring of alignment, the arch rib construction control technology of large-span stiff skeleton arch bridge is studied and analyzed.
Research conclusions:(1) In the cantilever assembly of the stiff skeleton, the arch rib alignment and the cable force were controlled, with the arch rib alignment being the main control. (2) In the simulation analysis, the vertical "0" displacement of the section was used to control the size of the cable force, and the vertical displacement was controlled within 1 mm error by adjusting the cable force and the elevation of the control point to obtain the cable force at this time. (3) Before the closure of the bridge, the joint test of the linear both sides and the whole bridge re-test were carried out. According to the monitoring results of the internal force and alignment of the arch ribs, the alignment and internal force of arch ribs were adjusted reasonably and effectively through the buckling cable and cable wind rope. (4) The construction control method of the arch rib proposed in this paper can effectively ensure that the arch alignment and structural stress meet the design and specification requirements, and it has reference value for the cantilever assembly and erection of the arch rib by the cable-stayed buckle-hanging method.

Key words： stiff skeleton construction control cable force optimization arch rib alignment

Received: 30 March 2022

PACS:	U448.22+3
	U445.464

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	Articles by authors
	XU Hong
	ZHOU Mi
	WANG Yamei
	XU Ruilong

Cite this article:

XU Hong,ZHOU Mi,WANG Yamei, et al. Research on the Construction Control of Arch Rib of Concrete-filled Steel Tube Stiff Skeleton Arch Bridge[J]. Journal of Railway Engineering Society, 2022, 39(9): 50-55.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I9/50

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