Reverse construction method for installing support after rotating

Abstract

The invention discloses a reverse construction method for installing a support after rotating, which comprises the following steps of: installation a pre-embedded steel plate and a reserved anchoring sleeve in a beam body according to design positions, installation a padstone pre-embedded steel bar in a side pier, arranging the pre-embedded steel plate in a horizontal manner and forming a plurality of reserved anchor rod holes in the pre-embedded steel plate, the positions and the number of the reserved anchoring sleeves are matched with the positions and the number of the reserved anchor rod holes in the embedded steel plate; after the beam body rotates in place, the position of the support is positioned, and the reserved anchor rod hole in the top plate of the support is right opposite to the reserved anchor rod hole in the embedded steel plate; the support is jacked up through a jack, a top plate of the support is attached to the pre-embedded steel plate, a lower screw rod is screwed into a reserved anchoring sleeve in the beam body sequentially through a reserved anchor rod hole in the top plate of the support and a reserved anchor rod hole in the pre-embedded steel plate, and the support is hung below the beam body; installing a stiff steel support at the bottom of the support, and dismounting the jack; and carrying out padstone reinforcing steel bar binding and template installation, and pouring concrete to form the padstone.

Description

technical field [0001] The invention relates to the technical field of bridge swivel construction, in particular to a reverse-sequence construction method of first swiveling and then installing a support. Background technique [0002] With the continuous development of national transportation, the phenomenon of three-dimensional crossing of bridge structures has generally formed. Since the construction of the bridge swivel can be prefabricated reasonably according to the on-site conditions, the construction directly above the line will be converted into parallel to the existing line construction without affecting the traffic, and it can overcome the shortcomings of difficult cast-in-site casting in special environments such as deep valleys and rapids, or difficult hoisting of prefabricated box girders. And it can save a lot of wood or steel. In recent years, it has been widely used in overpass bridges such as railways, highways, and rivers. The more common support construct...

AI Technical Summary

Problems solved by technology

The more common support construction technology at home and abroad at this stage is to install the support first, and then pour or hoist the girder body. However, in the construction process where the cantilever end of the swivel bridge is directly transferred to the top of the pier, due to the small gap between the bottom of the girder and the pier, If the support is installed first, it will greatly increase the difficulty of turning, and even hinder the rotation of the bridge. Therefore, it is necessary to design a reverse construction process of first rotating and then installing the support to overcome the above problems

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