Method of segment prefabricated bridge long and short line method combined bidirectional matching prefabrication

Abstract

The invention discloses a method of segment prefabricated bridge long and short line method combined bidirectional matching prefabrication, which comprises the following steps of: firstly, distributing box girder segments required to be prefabricated by a long line method and a short line method in the same prefabrication sequence according to a bridge type, and reserving a matching box girder segment for long and short line combined matching pouring in the middle of the prefabrication sequence; wherein prefabricating is conducted from two ends of the prefabrication sequence to the middle direction according to the long line method and the short line method; comparing the line shape of the segment prefabricated by the long line method and the line shape of the segment prefabricated by theshort line method with the designed line shape in all directions of a space coordinate axis to obtain the deviation rectifying amount after the prefabrication of the long line method and the short line method; and placing the measuring point coordinates of two matched sections under the same coordinate system through a professional linear control technology to pour the matched box girder sections.The method is short in construction time, small in occupied construction space and suitable for long line and short line combined matching section prefabrication construction of various kinds of bridge line shape.

Description

technical field [0001] The invention relates to the technical field of segmental prefabricated bridge construction, in particular to a method for segmental prefabricated bridge long and short line method combined with two-way matching prefabrication. Background technique [0002] The prefabrication methods used in existing segmental prefabricated bridges include long-line prefabrication and short-line prefabrication. [0003] The long-line prefabrication method is to make the segmental bottom form of the same prefabrication sequence at one time, and then prefabricate the segments at intervals. The segments do not need to be lifted off the pedestal in time, and the production speed is relatively fast. The disadvantage of this method is obvious. Since the formwork of the same prefabricated sequence needs to be completed at one time, the space occupied during construction is relatively large, the requirements for the site are high, and the formwork consumed is more and the sect...

AI Technical Summary

Problems solved by technology

[0006] The combination of traditional long-short-line method can also be used for cast-in-place construction in the middle connecting segment, but it will cause greater environmental pollution, and the on-site construction time will be longer than prefabrication, and the quality of concrete will be worse than prefabrication

[0007] The patent with publication number CN110029580A discloses a construction method of long and short lines combined with matching prefabricated segmental assembled bridge decks. This patented short line method can only prefabricate one segment, and the long and short line methods cannot be carried out at the same time. There is no two-way matching pouring process in this patent

Images