Through prestress steel truss and concrete combined continuous steel structure bridge and construction method thereof

Abstract

The invention discloses a through prestress steel truss and concrete combined continuous steel structure bridge and a construction method of the bridge. Upper chord members and lower chord members of a steel truss beam are respectively in hollow structures, vertical prestress steel bundles are arranged inside the upper chord members of the steel truss beam for bearing the hogging moment, concrete is filled inside the lower chord members, concrete bottom plates are formed between the lower chord members in a cast-in-situ way, the concrete is filled in the upper chord members of the steel truss beam for bearing sagging moment, the lower chord members are fixedly connected for forming steel bridge panels, and the concrete bottom plates and the steel bridge panels form bridge surface bases. The concrete consumption is obviously reduced, because the bridge surface is positioned in a position corresponding to the lower chord rods, the steel structure bridge has higher universality and can be applicable to environment with confliction in height differences between the headway and the pavement at two ends of the bridge, the bridge surface height can be reduced and regulated according to environment requirements, the navigation under the bridge and the smooth butt joint between the bridge surface and the pavements at two ends can be ensured, great construction transformation on the pavements at two ends is avoided, and the construction cost is greatly saved.

Description

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AI Technical Summary

Benefits of technology

This patented technology describes an improved way to construct reinforced composite frames that have better strength at high temperatures without adding too much material or requiring complicated processes like bolting. It also reduces the amount needed when installing these structures while maintain their integrity during use. Overall, this new design improves safety, durability, efficiency, flexibility, and cost effectiveness.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the durability and flexiblality of continuously reinforced hardened frames (CSTR) cast over large sections called Continuous Reinforce Frame Bridge(CRB). While current methods such as weld joining tend towards issues like cracking due to thermal stresses caused during curling processes, they require expensive equipment and complicated procedures. Additionally, existing techniques involve heavy lifting operations and may lead to instabilities when erected vertically across inclined slopes.

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