Construction method for one-time turning of large-span T-shaped single pier

Abstract

The invention discloses a construction method for one-time turning of a large-span T-shaped single pier. The construction method is characterized in that the T-shaped main beam turns to a place at a time, the two ends of the turned T-shaped main beam directly fall to side pier supports, closure sections are not arranged, a jack is adopted to jack the beam twice for construction operation in the turning process, closure construction conducted above a spanned obstacle is avoided, schedule of construction is improved, construction processes are decreased, mutual interference among the processes is greatly reduced, and construction quality is ensured. Construction of all main beams can be conducted through one side of a special section, one-time turning to the place is achieved, and a new construction method and experience are provided for turning construction of bridges.

Description

technical field [0001] The invention relates to a T-structure bridge swivel construction method, in particular to a construction method for one-time swivel construction of a single pier of a large-span, large-tonnage cast-in-place T-structure bridge under complex terrain conditions. Background technique [0002] With the development of urban rapid transportation, elevated rail transit is becoming more and more common. At present, the construction techniques of cast-in-place prestressed box girders spanning existing roads are relatively mature, including support method, cantilever casting method and swivel method. The swivel method is a relatively common construction method for cast-in-place prestressed box girders to span railways and other traffic arteries in recent years. The two sides of the obstacle are constructed with suspended or cast-in-place beam sections to form the lower and upper structures of the bridge. During the construction of the cap, the swivel spherical h...

AI Technical Summary

Problems solved by technology

The advantage of this method is that the length of the cantilever can be reduced by half when the span of the beam section is large; the disadvantage is that it needs to be closed and constructed above the obstacle that is crossed, which cannot be completed at one time, and construction sites need to be set up on both sides of the crossed obstacle.

[0003] Although the bridge swivel construction plays a vital role in crossing obstacles under special terrain, in practice, the existing swivel construction method requires symmetrical swivel construction and a closure in the middle of the beam section when crossing obstacles or special sections. section, showing great limitations, such as the symmetrical swivel of the bridge in the mid-span of a special section, and the inability to carry out high-altitude operations above the obstacles of the closing section, etc., which have certain difficulties

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