Concreting method with different intensity grades for beam column nodes

Abstract

A different intensity-level concretes casting method used for the beam-column nodes belongs to the construction technology field. A vertical dense-mesh steel-wire net is arranged around the beam-column node; column concrete cement with the intensity level high than that of the floor concrete is adopted to cast the beam-column node in the steel-wire net while the floor concrete is cast. The invention is simple, can be constructed easily and also can largely enhance the intensity of the beam-column nodes of the floor; the intensity level of the high-intensity wall column concrete is preserved; the intensity level of the high-intensity column-node concrete applied to the horizontal structure beam plate and column nodes is also preserved; the high-intensity concrete is not wasted and the construction joints between the borders of different intensity-level concretes can be avoided; the cold joints can be avoided; the combination is dense; and the construction quality can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of building engineering construction, in particular to a floor pouring method at beam-column joints of high-rise buildings. Background technique [0002] As we all know, the reinforced concrete column used for supporting the building is not continuous, and the upper column reinforcement is bound upwards from the position of the original reinforced concrete on the concrete floor slab formed on each floor. In the construction of construction projects, it is often encountered that the design requires that the concrete strength grade of the vertical structure (shear wall, frame column) on the same floor is higher than the concrete strength grade of the horizontal structure (frame beam, slab). The concrete strength grade of the column and the wall-attached column is higher than that of the wall concrete. Because when pouring the floor slab of this floor, in order to realize the integrity of the floor slab, the s...

AI Technical Summary

Problems solved by technology

[0004] 1. The formwork at the boundary between high and low-strength grade concrete is set up, and high-strength grade concrete is poured first, and then low-strength grade concrete is poured after the formwork is removed, so that many vertical components and horizontal components on the same floor will be produced. Seams will affect the quality of the project; the basement exterior wall, the concrete strength level of the wall and the attached wall column is different, and this method of construction will easily cause leakage of the basement exterior wall

[0005] 2. Use pumped commercial concrete to pour, first pour high-strength concrete to the top, and then pour low-strength concrete, but because the slump of pumped concrete is generally 160-180mm, it flows far after being vibrated, so The amount of high-strength grade concrete will increase a lot, the workload is heavy, and the time is not well grasped. After a long time, the edge concrete of high-strength grade concrete has finally set, and the low-strength grade concrete has not been covered and poured, which will make the junction of high-strength grade concrete and low-strength grade concrete. If the time is too short, the high-strength concrete has not yet initially set, and the low-strength concrete has already been poured, which will easily cause the low-strength concrete to mix into the high-strength concrete, and the Reduce the strength of high-strength concrete and affect the quality of the project