Wind-resistant locking device for final closure of steel truss beams erected by hole and application method thereof

Abstract

The invention discloses a wind-resistant locking device for a final closure of steel truss beams erected by hole and an method. The wind-resistant locking device is used for temporarily locking an erected A span steel truss beam and a B span steel truss beam to be erected and comprises two telescopic arms, a rear cross beam and two pushing mechanisms, wherein the two telescopic arms are respectively arranged on the two sides of a diagonal member of the A span steel truss beam along a transverse direction of bridge, and each telescopic arm comprises an outer sleeve, an inner sleeve and a driving mechanism; the outer sleeve is arranged on an A span lower chord member of the A span steel truss beam, and the inner sleeve is partly positioned in the outer sleeve; the driving mechanism is arranged in the outer sleeve, is connected with the inner sleeve and is used for driving the inner sleeve to move along a longitudinal direction of bridge; the rear cross beam is connected with the two outer sleeves; a containing area used for containing a B span lower chord member of the B span steel truss beam is formed between the inner sleeves of the two telescopic arms; and one ends of the two pushing mechanisms are respectively fixed onto the two inner sleeves and are positioned outside the outer sleeves, and the other ends of the two pushing mechanisms can extend or retract towards the containing area along the transverse direction of bridge. The wind-resistant locking device can improve the overall wind resistance during erection of the steel truss beams.

Description

technical field [0001] The invention relates to the technical field of bridge engineering superstructure steel truss girder hole-by-hole erection, in particular to a steel truss girder hole-by-hole erection closure wind-resistant locking device and a method of use. Background technique [0002] In the construction of the superstructure of the existing bridge engineering, the general multi-span and multi-connected long-span steel truss girders are erected hole by hole as follows: after the long-span steel truss girders are moved longitudinally and laterally to the steel truss girders at the wharf, Transported to the hole to be erected, the first-span steel truss girders in the first-span are directly erected by large-scale floating cranes, and the steel truss girders of the other spans except the first span are installed hole by hole with the assistance of diamond-shaped steel girder hangers until the first-span steel trusses are erected beam. [0003] However, from March to...

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Problems solved by technology

[0003] However, from March to October every year, unforeseen hurricanes or squall line winds frequently occur in the bridge site area. The highest wind speed in 10 years during the steel truss erection stage reaches 39.25m / s. On the one hand, the super strong squall line The wind has damaged the steel truss girder down the river wharf and the large floating crane; on the other hand, when the steel truss girder to be erected and the steel truss girder that has been erected are combined and docked, the wind resistance and stability of the two are weak. Closed docking security is low

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