An extended hanging basket for cantilever beam cast-in-place construction and its construction method

Abstract

The invention provides a lengthening hanging basket used for cantilever beam cast-in-place construction and a construction method of the lengthening hanging basket. A left lengthening section and a right lengthening section which are of the same structure and are symmetrical in the left and right direction are welded to an existing hanging basket. According to the structure of the right lengthening section, multiple pieces of box iron which are parallel to one another are welded into the notch of a front lower beam i-beam in the mode that the box iron extends rightwards in the direction of a bottom basket longitudinal beam so as to form a supporting table, the length, in the direction of the bottom basket longitudinal beam, of the supporting table is the sum of the length of a beam body to be cast and the length of a construction operation platform, an inclined support is arranged below each piece of box iron, the inclined supports are welded between the middles of the bottom faces of the box iron and a beam hanging frame, a layer of bamboo plywood is laid on the supporting table, and protective fences are evenly distributed on and welded to the outer edge of the right end of the supporting table. The front lower beam of the existing hanging basket is lengthened, diagonal draw steel bars are arranged between a bottom plate of the lengthened section and the front section of the beam so that a working platform can be formed, the steel bar binding work of the rear section of the beam is conducted while the front section of beam becomes strong after casting is conducted, and the box girder segment construction period is effectively shortened.

Description

technical field [0001] The invention relates to a cantilever cast-in-place construction device and a construction method used in bridge construction, in particular to a continuous cast-in-place beam construction device and a construction method that adopts a diamond-shaped hanging basket for construction and requires a tight construction period. Background technique [0002] Since the prestressed concrete continuous beams in this method are widely used in bridge construction, the construction of continuous beams generally adopts segmental cantilever pouring construction with light hanging baskets (1, "Railway Standard Design, 2006, (11), 41-44", author : The Third Engineering Company of China Railway 25th Bureau Group; 2. "Dazhong New Technology, 2010, (2): 74-75,, 21", author: Nanning Branch of China Railway Second Academy). Hanging basket construction is a new cantilever continuous beam construction method, but the management construction process is relatively fixed, and t...

AI Technical Summary

Problems solved by technology

Hanging basket construction is a new type of cantilever continuous beam construction method, but the management construction process is relatively fixed, and the time required for each process is relatively fixed. In order to ensure construction quality and construction safety, the total construction time cannot be compressed to the shortest value

In the actual construction process, due to the tight construction period of many projects, it is difficult to reduce the construction period of the cantilever continuous beam construction part using the hanging basket, resulting in the possibility of partially completing the target within the specified construction period.

[0003] For example, after the pouring of the front section of the box girder is completed, the equal-strength maintenance period of the concrete must be reserved separately, and the reinforcement work of the rear section of the box girder cannot be carried out, resulting in waste of construction period between the construction of the box girder sections

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