Segment-assembling simply supported box girder movable falsework construction method

Abstract

The invention discloses a segment assembled simple box girder movable trestle construction method. The required construction simple box girder has single hole or multiple holes, and is assembled by a plurality of longitudinal (i.e. along bridge direction) segment box grinders; the method comprises the following steps: prefabricating all the segment box girders for assembling the simple box girderin concentration; assembling and erecting the first hole grinder, which comprises the steps of: assembling and erecting the trestle (i.e. assembling platform), hanging the segments on to the assembling platform according to the assembling sequence and adjusting the arch degree, line style and position accurately, constructing the segments on the assembling platform by segment assembling construction technology until complete the whole hole grinder construction, and dismounting the trestle and moving to the next hole grinder; and performing the subsequent hole grinders in order according to the construction steps of the first hole grinder. the invention achieves the advantages of simple steps, low construction difficulty, short construction cycle and low onetime fund investment; can solvesthe practical problems existing in the segment assembling construction process of current large-span bridge fabrication machine.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a construction method for a segmentally assembled simply supported box girder movable frame. Background technique [0002] Nowadays, passenger-dedicated railways have become a major trend in the development of railways in the world. Among the passenger-dedicated railways that have been built or are under construction, the mileage of the line using viaducts generally accounts for half or more of the total length of the line. Passenger-dedicated railways require large opening capacity and high speed. Fast (350km / h), at the same time, the full-hole box girder has high torsional and bending rigidity, simple force, and simple form, which can meet the stability requirements of high-speed driving. Therefore, the whole-hole box girder is basically used in passenger dedicated line railways. For small-span bridges on passenger-dedicated railways, with spans of 32m, 24m, and 20m...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a construction method for segmentally assembled and simply supported box girder mobile frame, which has simple construction steps, low construction difficulty, short construction period and one-time capital investment in view of the deficiencies in the above prior art less, can effectively solve the practical problems existing in the segmental assembly construction technology of the existing long-span bridge bridge building machine

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