Combined structure of joist bridge plate of steel trestle

Abstract

The invention provides a combined structure of a joist bridge plate of a steel trestle. The combined structure comprises a bridge plate, a joist and specially-shaped bolts, wherein the joist is a I beam; the bridge plate is of plate-block-shaped steel structure; a bottom plate of the bridge plate is provided with bolt holes corresponding to the specially-shaped bolts at the two ends of the overlapped position with an upper wing plate of the joist; each specially-shaped bolt consists of a bolt head and a bolt rod; an inner hole is arranged at the tail part of the bolt rod; a clamping surface is arranged at the bolt head; the upper wing plate is clamped between the bottom plate and the clamping surfaces of the two bolt heads along the longitudinal direction of the steel trestle, and realizes fastening connection with the bottom plate by the specially-shaped bolts and nuts; and the long edges of the two bolt heads are parallel to the longitudinal direction of the steel trestle. The combined structure provided by the invention has the advantages that since the inner holes are arranged at the tail parts of the bolt rods and both the connecting operation and the removing operation in site installation are carried out on a bridge deck, so that the construction operation is easier and the safety is good; in addition, members cannot be damaged in removal, and the repeated usability is better, so that the cost is reduced.

Description

technical field [0001] The invention relates to a steel trestle bridge for civil engineering construction, in particular to a joist bridge plate composite structure of a steel trestle bridge. Background technique [0002] The steel trestle bridge used during civil engineering construction is a temporary structure that needs to be demolished after the main project is completed. Usually the entire steel trestle structure is pile foundation, beam, longitudinal beam, joist and bridge plate from bottom to top. The joists are I-beams arranged transversely along the length direction, and each joist is arranged longitudinally along the bridge at an interval of about 1.5 meters. The bridge deck is a plate-shaped steel structure composed of rectangular panels, longitudinal ribs, transverse ribs and bottom plates. Several bridge slabs are arranged orthogonally and densely on top of multiple joists, which have been changed into steel trestle bridges. The existing joist-bridge-slab co...

AI Technical Summary

Problems solved by technology

The existing joist-bridge-slab combined structure is generally formed by connecting the joist and the bridge-slab by on-site welding. During construction, there are problems of heavy welding workload and serious pollution.

In addition, gas cutting can only be used for dismantling. The construction volume is large, and most of the dismantled components become waste materials. That is, the reuse rate of joists and bridge plates is very poor, which causes great waste and increases construction costs.

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