Open web type continuous steel bridge structure and buckling, hanging and pouring method of cantilever

Abstract

The invention discloses an open web type continuous steel bridge structure and a buckling, hanging and pouring method of a cantilever. The method comprises the following steps: (1) hollowing a web plate of a root area so as to ensure that a beam body of the root area is separated into an upper chord and a lower chord, and taking a main span diameter as the length of the root web plate; (2) taking the main span diameter as the total height of the root; (3) selecting the height of a solid-web beam, taking the height of a joining point of the upper chord and the lower chord as the length of the solid-web beam and taking the main span diameter as the height of a middle span; (4) taking the length of a hollowing area as the height of the upper chord beam; (5) taking the length of the main span diameter as the height of the lower chord beam, and changing the lower edge of the lower chord and the lower edge of the solid-web beam according to a continuous curve; (6) arranging a hanging basket on the lower chord section of the symmetrical construction in the buckling, hanging and pouring method of the cantilever of the upper chord; and (7) carrying out constructions on each section of the solid-web beam by the cantilever and joining the sections to finish the construction of the whole bridge. The invention has simple method, convenient construction, safety, simple structure, stability and reliability and improves the spanning capacity and the engineering economy of the bridge.

Description

technical field [0001] The present invention relates to the technical field of bridges used in civil engineering, more specifically to a method for the structure of a hollow continuous rigid frame bridge, and also to a method for cantilever buckle-hung pouring construction of a hollow continuous rigid frame bridge. Under the premise of keeping the construction requirements and durability characteristics of the general continuous rigid frame bridge basically the same, a new bridge type with greater spanning capacity and better economy has been realized. Background technique [0002] A bridge is a structure for crossing various obstacles (such as rivers or other structures) in highways, railways, urban roads, rural roads, and water conservancy construction. According to the mechanical characteristics of the structure, the bridge can be divided into beam, arch, rigid frame, suspension and composite system. The concrete structure mainly adopts beam, arch and rigid frame system....

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Problems solved by technology

[0004] Generally speaking, the main disadvantages of traditional prestressed concrete continuous rigid frame bridges are: (1) the spanning capacity is small, the material utilization rate is low, and when the span is greater than 200m, the engineering economy deteriorates sharply; (2) the structural bearing efficiency Low, when applied to bridges with a span greater than 200m, it is prone to cracking and deflection problems, the technical risk increases, and the safety and durability of the structure deteriorate; poor ability for earthquakes

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