PLC multi-point synchronous three-dimensional hydraulic bridge jacking system and jacking method

Abstract

The invention discloses a PLC multi-point synchronous three-dimensional hydraulic bridge jacking system and a jacking method. The jacking system includes a jacking monitoring system and multiple sets of walking-type three-dimensional hydraulic jacking for jacking the steel box girder to be pushed equipment, each push pier is provided with two sets of temporary support bases symmetrically arranged on the left and right; the push method includes steps: 1, assembling tire frame and construction of temporary pier; 2, three-dimensional adjustment device, pushing equipment and Temporary support seat construction; 3. Steel box girder assembly and synchronous jacking; 4. Steel box girder jacking. The present invention adopts multiple sets of walking-type three-dimensional hydraulic jacking equipment to push forward the steel box girder synchronously and multiple times. The jacking control is simple, and the synchronous action of multiple sets of walking-type three-dimensional hydraulic jacking equipment can be easily realized, and the pushing position The layout is flexible, and there is no need to use guide beams and slideway beams for longitudinal jacking, truly realizing self-balancing jacking, and the jacking process is safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a PLC multi-point synchronous three-dimensional hydraulic bridge jacking system and a jacking method. Background technique [0002] With the continuous improvement of my country's bridge design and construction technology, a large number of continuous steel box girder bridges have emerged in the fields of highways, urban transportation, and railways. The jacking method is widely used in its construction due to the advantages of less land occupation, no impact on the traffic under the bridge, no need for large lifting equipment, safety and reliability, and low cost. 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, horizontal jacks (also called jacking force devices or jacking force devices), etc., the actual During construction, ...

AI Technical Summary

Problems solved by technology

However, the multi-point jacking method and the corresponding jacking system currently used have the following defects and deficiencies to varying degrees: First, the synchronization accuracy of the existing jacking equipment is not enough, and there are inevitably multiple jacking machines in the jacking process The action error of the equipment; second, the existing jacking construction method and jacking system are difficult to control the closing accuracy of the jacking under large slopes and linear complex situations; third, without fully automatic digital control, it is difficult to grasp the accuracy of the force value ; Fourth, more operators are required, labor input is large, labor-intensive and time-consuming, and construction efficiency is low; Fifth, part of the multi-point push construction also needs to use guide beams for traction, the construction investment is large, and the construction process is complicated

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