Preloading operation method of a high-altitude tower column crossbeam support

Abstract

The invention relates to the field of bridge engineering and discloses a preloading operation method of a high-altitude tower column crossbeam support, which is suitable for cable-stayed bridges, suspension bridges and the like. The method comprises the following steps: S1, a hinged preloading force transmission structure is manufactured. The hinged preloading force transmission structure is formed by a hinged diagonal brace A and a hinged diagonal brace B. The force transmission bracket is connected with a steel pin correspondingly; S2, construction is carried out on that tower column and a support is erected, wherein the tower column is provided with a tower column reserve hole for pas steel wire rope, the horizontal included angle of the tower column reserve hole is 0 DEG, and the bracket legs of the support are embedded in advance and the upper frame bracket legs are embedded in the tower column during construction. After the bracket corbel is finished, the bracket is erected on the bracket corbel, and the upper bracket is erected between the upper bracket corbel. S3, hinged preloading force transmission structure is installed, one end of that steel wire rope is connected withthe articulated preloading force transmission structure, and one end passes through a pre-reserved hole of a tower column; S4, the jack is installed, using the pulling force F (i) n ( / i) exerted on the wire rope by the jack; S5, the hinged preload transfer structure and the jack are removed to complete the preload of the bracket.

Description

technical field [0001] The invention relates to the field of bridge engineering, more specifically, to a preloading operation method for a high-altitude tower column beam support, which is suitable for bridges such as cable-stayed bridges and suspension bridges. Background technique [0002] When constructing the pylon beams of cable-stayed bridges (or suspension bridges), it is necessary to set up supports and preload the supports to set up templates to pour the beams between the pylons. In the construction of pouring concrete structures, the purpose of preloading the brackets is: (1) to ensure the safety of the brackets and ensure construction safety; (2) to eliminate the influence of inelastic deformation of the foundation and brackets, and to ensure the pouring quality of the cast-in-place concrete structures. At present, the conventional method of preloading the brackets of the beams is to use bulk sandbags or water tanks for loading. However, due to the high position o...

AI Technical Summary

Problems solved by technology

At present, the conventional method of preloading the brackets of the beams is to use bulk sandbags or water tanks for loading. However, due to the high position of the beams between the tower columns of cable-stayed bridges (or suspension bridges), some of which are even as high as hundreds of meters, conventional methods are used. Support preloading, bulk sandbags or water tank filling, etc. require heavy workload and difficult to achieve

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