Double-cable lifting device and lifting method for large-span solid-web arc beam

Abstract

The invention discloses a double-cable lifting device for a large-span solid-web arc beam. The double-cable lifting device comprises L-shaped lug plates arranged at the two ends of the arc beam, and each L-shaped lug plate is provided with a vertical lifting tool and a horizontal lifting tool. The two vertical lifting tools are hinged to the upper portions of the L-shaped lug plates through hinge pins and connected with vertical inhaul cables extending upwards respectively. The two horizontal lifting tools are hinged to the opposite sides of the two L-shaped lug plates through hinge pins, and a horizontal inhaul cable is arranged between the two horizontal lifting tools and connected with a horizontal hydraulic tensioning device. The horizontal length of the whole arc beam is adjusted through tensioning, length adjustment in the horizontal direction is carried out according to needs, and therefore the problem that a high-strength bolt can not penetrate into a bolt hole of a main structure under the conditions of reverse arc deformation generated in the lifting process of the arc beam, expansion deformation caused by temperature, out-of-plane instability caused in the installation process of an arc structure and the like is solved, and hole penetration and alignment after the arc beam is lifted in position can be easy.

Description

technical field [0001] The invention relates to a hoisting device and method for a large-span solid-web arc beam, and is especially suitable for a double-cable hoisting device and a hoisting method for a large-span solid-web arc beam. Background technique [0002] At present, steel structure engineering in the domestic construction industry is developing rapidly, and more and more buildings with long-span spatial structures are being designed and constructed. According to the requirements of the development of space structure engineering, there is an urgent need to have corresponding structure installation and construction technology. For long-span steel structure solid-web curved beams, the existing hoisting method is usually to assemble a group of 4 structural units on the ground during construction, and then lift them up for installation as a whole. The main disadvantage of the existing hoisting method is that : Many high-altitude operations, poor installation accuracy, ...

AI Technical Summary

Problems solved by technology

For long-span steel structure solid-web curved beams, the existing hoisting method is usually to assemble a group of 4 structural units on the ground during construction, and then lift them up for installation as a whole. The main disadvantage of the existing hoisting method is that : Many high-altitude operations, poor installation accuracy, difficult to maintain the arch arc, long installation cycle, etc., which are specifically reflected in the following aspects:

[0003] 1. When the steel structure of the dome is lifted as a whole, it is elastically deformed by the force of the hydraulic lifting system. Specifically, since the dome structure is an arc-shaped structure, in the existing large-span arc-shaped lifting method, vertical cables and Horizontal stay cables, in the prior art, the vertical stay cables and horizontal stay cables are usually directly connected to the steel beam flange, which is very easy to generate destructive force on the upper and lower flanges of the main structure, so that the steel beam cannot be produced during the loading process. The permanent deformation of the repair; in addition, the expansion and contraction deformation of the structure under the action of temperature can easily lead to the inability of high-strength bolts to freely pass into the bolt holes when the dome structure is docked with the original structure

[0004] 2. Due to the large radian of the dome structure and the high installation height, the efficiency of single-piece installation at high altitude is low, and large-scale hoisting machinery is required for installation. Moreover, it takes a long time to erect the high bracket in the existing construction technology, and the single solid-belly arc-shaped steel beam is lifted Or it is easy to cause out-of-plane instability during hoisting, which poses a great safety risk

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