A hydraulic jacking system and construction method for adding knots at the bottom

Abstract

The invention belongs to the field of steel structure buildings, and in particular relates to a hydraulic jacking system with bottom joints and a construction method. The jacking system is composed of a jacking reaction frame, an anti-overturning stable frame, a standard joint of the jacking frame and a top platform. During the jacking process, as the jacking height continues to increase, the anti-overturning stability of the entire jacking system will decrease. By setting the anti-overturning stabilizer, the jacking system will always maintain the release of the vertical translational freedom during the jacking process. The directional translation and rotation degree of freedom constraints improve the anti-overturning stability of the entire jacking system, and the jacking beam is connected to the standard joint of the jacking frame through a pin connection, which improves the efficiency of jacking construction.

Description

technical field [0001] The invention belongs to the field of steel structure buildings, and in particular relates to a hydraulic jacking system with bottom joints and a construction method. Background technique [0002] At present, the construction of large-scale space steel structure roof mainly includes component installation method, block hoisting method, cumulative slip method, integral / block cumulative lifting method and jacking method, among which jacking method is a fast and efficient construction method. The method is often used in the construction of large space steel structure roofs with a small construction height (15m-20m). [0003] However, the existing conventional jacking methods are divided into two categories: one is the combination of temporarily assembled jacking frames and jacks, and the joint method is bottom joints; the other is the use of strip pads and square pads and jacks. Combination, the purpose of jacking is achieved by continuously increasing t...

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Problems solved by technology

[0004] The main disadvantage of the first type of jacking method: because the bottom joint method is adopted, the hydraulic jack is placed at the bottom of the jacking frame. As the jacking height increases, the anti-overturning stability of the jacking frame during the jacking process also decreases Then it dropped sharply; the main disadvantage of the second type of jacking method: because the purpose of jacking is achieved by continuously adding steel pads at the top, there is a lack of stable connection between the steel pads. As the jacking height continues to increase, It will also greatly reduce the stability of its jacking system. At the same time, it is necessary to manually move the jack every time the pad is added, which greatly reduces the construction efficiency.

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