Jack quick adjusting method in bridge four-point jacking construction

Abstract

The invention relates to a jack quick adjusting method in bridge four-point jacking construction. The method comprises the following steps: step 1, determining bridge jacking position precision requirements and jacking force balancing requirements; step 2, adjusting the jacking distances of four jacks so as to enable a bridge to reach a target height; step 3, judging whether the jacking forces of the jacks meet force balancing requirements or not; step 4, adjusting the jacking forces of the jacks so as to meet the force balancing requirements; step 5, judging whether the bridge meets position precision requirements or not after adjustment. The jack quick adjusting method provided by the invention ensures that repeated adjustments by constructors during bridge jacking construction can be avoided, and the construction efficiency is improved; a jacking construction way taking bridge position precision as a single indicator is improved, with the consideration to bridge jacking position precision and balance to the jacking force of the four jacks, the stress condition of the bridge is improved, risks of damages to a bridge support, caused by unbalanced stress, can be reduced, and the service life of the bridge is prolonged.

Description

technical field [0001] The invention relates to a quick jack adjustment method that takes into account both the accuracy of the jacking position of the bridge and the balance of the jacking force during the four-point jacking construction of the bridge. The quick adjustment method of the jack required by the pressure balance of the support. Background technique [0002] Due to the uneven distribution of materials during the manufacture of prefabricated girder bridges and the asymmetric structure of the bridge itself, the equivalent centroid of the bridge does not coincide with the geometric center of the bridge. During the four-point jacking construction process of prefabricated girder bridges, after the bridge reaches the target height, the jacking force between the supports will produce a large unbalanced error. satisfy. [0003] At present, the adjustment of the bridge during the bridge jacking construction mostly focuses on the adjustment of the bridge jacking position...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the deficiencies of the existing bridge jacking devices and methods, the present invention provides a rapid jack adjustment method that takes into account both the bridge jacking position accuracy and the jacking force balance during the bridge four-point jacking construction, so as to ensure the bridge jacking position accuracy and jacking force balance. The balance of lift force meets the requirements of construction technology at the same time

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