Ultrahigh-performance concrete bridge deck

Abstract

The invention discloses an ultrahigh-performance concrete bridge deck. The ultrahigh-performance concrete bridge deck is formed in the manner that ultrahigh-performance concrete slabs arranged in an array are connected into a whole. The bottom face of each ultrahigh-performance concrete slab is in a groove shape. Each groove is in a flat quadrangular pyramid frustum shape which becomes wider gradually from top to bottom. Reinforcing meshes formed in the manner that steel reinforcing bars arranged in the two stress main directions are connected into a whole are arranged in the ultrahigh-performance concrete slabs. The connection section between every two adjacent ultrahigh-performance concrete slabs is an ultrahigh-performance concrete slab connection section. All or a part of the ultrahigh-performance concrete slab connection sections are connected with inner components of a main beam below the bridge deck. By the adoption of the ultrahigh-performance concrete bridge deck, the local rigidity of the bridge deck is improved, and the fatigue cracking problem caused by an orthotropic steel bridge deck is solved; the adhesive performance and mutual coordination deformation between UHPCand bituminous concrete are good, the risks that adhesion between the orthotropic steel bridge deck and a pitch wearing layer is prone to ineffectiveness and a pitching pavement layer is prone to damage are solved, and bridge deck pavement can adopt conventional bituminous concrete.

Description

technical field [0001] The present invention relates to an ultra high performance concrete (UHPC) bridge deck. Background technique [0002] The orthotropic steel bridge deck is composed of a steel roof, longitudinal stiffeners and diaphragms connected by welds. It has a series of advantages such as light weight, large ultimate bearing capacity, and short construction period, and is widely used in large-span bridges. In bridges, due to factors such as low stiffness of steel bridge decks, poor bonding performance with asphalt concrete, and poor mutual coordination and deformation performance, many orthotropic steel bridge decks in service have fatigue cracking and pavement damage ( ruts, potholes) and many other diseases; and the use of heavier ordinary concrete decks to replace the orthotropic steel decks on the steel girders, although the fatigue of the orthotropic steel decks has been solved, but due to its own lower tensile strength Low, not only the slab is thicker, the...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide an ultra-high performance concrete (UHPC) bridge deck with high tensile and compressive strength, reliable connection, good durability and low cost, which can effectively solve the problem of using orthotropic steel bridge decks Fatigue cracking caused by fatigue cracking, bridge deck pavement damage and ordinary concrete bridge deck are easy to crack and other problems that have plagued the engineering field for a long time. It is suitable for PK steel box composite beams, closed steel box composite beams, edge steel box composite beams, and I-beam composite beams. and steel truss composite beams, etc.

[0011] The present invention significantly improves the local stiffness of the bridge deck, and solves the problem of fatigue cracking that has plagued the engineering field for a long time caused by the use of orthotropic steel decks; moreover, the bonding performance and mutual coordination deformation performance of UHPC and asphalt concrete are better, It avoids the risk of easy failure of the bond between the orthotropic steel bridge deck and the asphalt wear layer and the risk of easy damage to the asphalt pavement layer, and the bridge deck can be paved with conventional asphalt concrete

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