T-shaped plate girder segment prefabricating unit based on steel truss and combined bridge deck slab

Abstract

The invention discloses a T-shaped plate girder segment prefabricating unit based on a steel truss and a combined bridge deck slab. The T-shaped plate girder segment prefabricating unit comprises a lower force bearing structure and the combined bridge deck slab arranged on the lower force bearing structure, and the combined bridge deck slab and the lower force bearing structure are both arranged in the longitudinal bridge direction; the lower force bearing structure is a planar truss composed of an upper chord rod, a lower chord rod and a web rod, the upper chord rod comprises a first rectangular steel tube, and the lower chord rod comprises a second rectangular steel tube; the combined bridge deck slab comprises a bottom supporting steel plate, a plurality of upper longitudinal ribs arranged on the bottom supporting steel plate, and a concrete bridge deck slab arranged on the bottom supporting steel plate in a pouring mode, the upper longitudinal ribs are arranged in the concrete bridge deck slab in a pouring mode, and the upper longitudinal ribs are long-strip-shaped steel plates with the middles provided with a plurality of through holes; the bottom supporting steel plate is a rectangular supporting steel plate formed by connecting a left extension steel plate, a right extension steel plate and a first rectangular steel tube. The T-shaped plate girder segment prefabricating unit is simple in structure, reasonable in design, easy and convenient to construct, good in overall mechanical property and capable of improving the structure accuracy and construction convenience of a steel and concrete combined bridge.

Description

technical field [0001] The invention belongs to the technical field of bridge construction engineering, and in particular relates to a T-shaped plate truss section prefabricated unit based on a steel truss and a composite bridge deck. Background technique [0002] Steel-concrete composite bridge is a new type of bridge structure developed in China in recent years. It has a broad application prospect in China because it fully utilizes the characteristics of steel structure and concrete structure and their combination. Steel truss bridges are one of the more popular types of bridges at present because of their light weight, strong spanning ability, and easy factory construction. The bridge deck system plays an important role in the bridge. It can not only bear the load together with the beam, but also ensure the smoothness and comfort of driving. [0003] The bridge deck of the traditional steel truss bridge can adopt steel bridge deck or concrete bridge deck, among which the...

AI Technical Summary

Problems solved by technology

However, at present, the bridge deck is generally connected to the steel girder by setting connection keys such as shear nails. The local stress of the bridge deck is large, and the connection efficiency is low. In addition, the number of shear nails welded is large, and the construction speed is slow.

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