Hanging device of large-scale over-long box girder

Abstract

The invention discloses a hanging device of a large-scale over-long box girder, comprising a shoulder pole main truss of a truss structure, wherein the truss structure can be connected with a hoisting device. The shoulder pole main truss is connected with a hanging point distribution beam, and a traction and connection device of the large-scale over-long box girder is arranged on the hanging point distribution beam and is connected with a supporting component joist used for the large-scale over-long box girder. In the invention, the hanging point distribution beam is arranged on the shoulder pole main truss and is utilized to realize the hanging of the large-scale over-long box girder. The hanging device of a large-scale over-long box girder is safe and reliable, is easy and convenient tooperate and is suitable for the hanging construction of the large-scale over-long box girder.

Description

technical field [0001] The invention belongs to a box girder hoisting device, in particular to a large super-long box girder hoisting device. Background technique [0002] With the development of my country's economic construction, more and more long-span bridges are being built on the sea and on major rivers, and the superstructure of bridges generally adopts the form of box girders. Nowadays, the advanced construction technology of beam field prefabrication, large-scale crane ship transportation, and box girder erection has gradually been paid attention to in the world. The hoisting device for box girder transportation is an important equipment to ensure the safety of box girder transportation and the structure of box girder from damage. When transporting the prefabricated prestressed reinforced concrete box girders weighing 2,200 tons and 70m long for the East China Sea Bridge and the Hangzhou Bay Cross-sea Bridge in China, the box girders are hoisted by lifting girder p...

AI Technical Summary

Problems solved by technology

In the way of setting two joists at the bottom of the box girder, when the span of the box girder increases, in order to meet the design requirements for the position of the joist bearing point (hanging point), the overall size and self-weight of the main truss of the hanging beam shoulder pole will be adjusted accordingly. The increase will affect the hoisting height of the box girder on the crane ship, thereby affecting the erection height of the box girder, and will also increase the manufacturing cost of the main truss on the pole, and the new manufacturing time will be long, thus delaying the construction period of the project

Therefore, the existing structure cannot be applied to the hoisting of large super-long box girders

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