Positioning method for special-shaped concrete counterfort rebar

Abstract

The invention relates to a positioning method for a special-shaped concrete counterfort rebar. The method comprises the steps that (1) the rebar is segmented, specifically, the rebar is segmented into three sections, the first rebar section extends to the position five meters higher than the upper portion of a straight column and the upper portion of a stand column, the second rebar sections extend to the positions two meters away from concrete of fifth sections of an arch fork, the third rebar sections extend to the top ends of the arch fork, two sets of positioning supports are arranged, the first set of positioning supports is located at the tops of the second rebar sections and supports construction of second concrete sections, and the second set of positioning supports is located at the tops of the third rebar sections and supports construction of third concrete sections and fourth concrete sections of the arch fork; (2) the rebar molding is controlled; and (3) the positioning supports are conducted, specifically, each set of positioning supports adopts two steel tubes as vertical rods, one transverse steel tube is arranged on the lower sides of the two steel tubes on the lower portions and is fixed through welding, another transverse steel tube is arranged on the lower sides of the two steel tubes on the upper portions and is fixed through welding, two longitudinal steel tubes are connected with the transverse steel tubes correspondingly, and rows of steel tubes are arranged on the longitudinal steel tubes spaced by one steel tube and used for supporting transverse rebars.

Description

technical field [0001] The invention relates to a positioning method for reinforcing bars of concrete arch columns, in particular to a positioning method for reinforcing bars of special-shaped concrete arch columns. Background technique [0002] Large-scale factories, stations and public venues often adopt a large roof system according to the architectural shape. The concrete structure on the underside of the steel structure roof includes roof arch feet, concrete ring beams, special-shaped columns and inclined column beams, etc. The entire roof system is an unconventional component, and its shape is often a hyperboloid or warped surface. The main function of the large arch feet and arch columns is to support the entire large roof system. The arch foot slant columns and the lower reinforced concrete An out-of-plane support system for the superstructure is formed to ensure its stability and safety. [0003] Out-of-plane support system features: [0004] 1) The diameter of th...

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Problems solved by technology

[0004] 1) The diameter of the main steel bar of the arch column and the ring beam is 40mm, and the steel bar is constantly distorted following the shape of the arch foot and the ring beam. The spatial position of each steel bar is different, and each steel bar needs to be processed independently according to the spatial position, and Due to its large load, independent supports must be erected for the positioning and support of the steel bar project, so the positioning, processing and support of the entire complex steel bar project are quite difficult

[0005] 2) The engineering structure is complex. The arch columns and inclined beams are twisted and deformed. At the same time, the steel structure and the concrete ring beam are connected at the top of the front and rear arches respectively. It is necessary to ensure the precise connection at the end of the construction; the concrete ring beam is also a three-dimensional structure of space. And the height is about 28 meters, therefore, it is necessary to prepare a special monitoring plan to monitor the spatial position of complex components

The setting out of steel bars at the intersection of beams and columns is very complicated, and installation and construction are difficult

[0007] 4) The inner slanted column is a gradually inclined column with a large top and a small bottom. In the conventional steel bar construction method, the stirrup can not be constructed in the way that the stirrup is set from top to bottom.

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