A multi-point adaptive jacking device for steel box girder

Abstract

The invention provides a multi-point self-adaptive jacking-pushing device for a steel box girder. The multi-point self-adaptive jacking-pushing device comprises a horizontal jack and a vertical jack,one end of the horizontal jack is fixedly connected with the vertical jack, and the other end of the horizontal jack is fixedly mounted on a vertical plate; the lower portion of the vertical jack is located in a sliding groove, the bottom of the vertical jack is connected with a sliding block, the top end of the vertical jack is provided with a bearing plate, and the top end of the vertical jack is connected with the bearing plate in a hinged mode; a plurality of protruding blocks are evenly arranged on the bearing plate, and grooves are formed in the positions, corresponding to the protrudingblocks, of the bottom of the steel box girder; the protruding blocks and the grooves can be matched in an inserting-connection mode; and two vertical steel box girder receiving plates are arranged onthe two sides of the vertical plate correspondingly, the top ends of the steel box girder receiving plates are provided with a plurality of auxiliary pulleys, and the auxiliary pulleys can make contact with the steel box girder. According to the multi-point self-adaptive jacking-pushing device for the steel box girder, the bearing plate is additionally arranged, and the protruding blocks on the bearing plate are matched with the grooves in the steel box girder so that the steel box girder can effectively move under the matched action of the horizontal jack and the vertical jack, heavy objectsdo not need to be additionally arranged, and the working efficiency is improved effectively.

Description

technical field [0001] The invention belongs to the field of bridge construction, in particular to a multi-point self-adaptive pushing device for a steel box girder. Background technique [0002] With the continuous development of society, people's living standards and quality are also constantly improving, and bridge construction is also undergoing tremendous changes. Since Leonhardt and Professor Bauer of Dewei first used the jacking method on the Ager Bridge in Austria in 1959, the number of bridges constructed by the jacking method in countries around the world has been increasing. [0003] The jacking method construction is to set up a prefabricated field behind the abutment along the bridge axis direction, and set up steel guide beams, temporary piers, slideways, and horizontal jack force-applying devices. Specifically, the prefabricated concrete beam sections are segmented, connected into a whole with longitudinal prestressed tendons, the beams are pushed out section...

AI Technical Summary

Problems solved by technology

[0008] At present, multi-point jacking has low requirements on jacking equipment and is widely used for easy control. However, in the initial stage, due to the light weight of the steel box girder, the combination of horizontal jacks and vertical jacks for jacking is insufficient due to insufficient friction. It is difficult to drive the steel box girder to move. Usually, in order to increase the friction during the construction process, it is generally used to add heavy objects on the steel box girder in the early stage to increase the friction by increasing the weight. However, in this way, heavy objects will have a certain impact on the overall operation during the construction process, and a series of operations of placing heavy objects and then removing them is also a waste of time and affects work efficiency

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