Steel box girder incremental launching construction method based on walking type three-dimensional hydraulic incremental launching equipment

Abstract

The invention discloses a steel box girder incremental launching construction method based on walking type three-dimensional hydraulic incremental launching equipment. The two ends of a construction steel box girder are each supported on a girder end pier, and the construction steel box girder is divided into a first girder body and a second girder body with a midspan pier being the boundary; incremental launching construction includes the steps that 1, temporary piers and midspan temporary piers are constructed; 2, incremental launching is conducted on the girder bodies synchronously throughthe walking type three-dimensional hydraulic incremental launching equipment; 3, midspan closing is conducted. The walking type three-dimensional hydraulic incremental launching equipment is adopted for conducting incremental launching on the two girder bodies synchronously until the two girder bodies of the constructed steel box girder are closed from two sides to the midspand; incremental launching of the walking type three-dimensional hydraulic incremental launching equipment is easy and convenient to control, multiple sets of walking type three-dimensional hydraulic incremental launching equipment can easily and conveniently act synchronously, incremental launching positions are arranged flexibility, a guide beam and a slideway beam used for longitudinal incremental launching are not needed, self-balance incremental launching is really realized, and the process of incremental launching is safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, in particular to a steel box girder jacking construction method based on walking three-dimensional hydraulic jacking equipment. 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, aft...

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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