Formwork support system and construction method of high-rise cantilevered structure

Abstract

The invention relates to a high-rise cantilever structure formwork support system and a construction method. The high-rise cantilever structure formwork support system includes a pre-embedded steel plate with diagonal bracing on the shear wall of the lower floor, and a diagonal support is installed on the steel plate with the diagonal brace. A cantilevered I-beam is installed at the upper reserved hole, and the cantilevered area formwork bracket is supported on the cantilevered I-beam. The invention also provides a construction method when the horizontal pipeline passes through the wall. The construction steps include: (1) pre-embedded diagonal braces Steel plate production; (2) Pre-embedded parts; (3) Reserving openings; (4) Installing grooved prefabricated backing plates; (5) Installing pre-welded connection positioning rods; (6) Installing cantilevered I-beams ; (7) I-beam oblique support installation; (8) Cantilever area and non-cantilever area bracket erection; (9) Formwork installation preload; (10) Install the overall forming steel cage of the cantilever structure; (11) Pull up I-beam steel wire rope; (12) Reserve the hole for plugging. The high-rise cantilever structure formwork support system and construction method involved in the invention are convenient for construction, can improve the construction quality and construction safety of the cantilever slab, and have good economic and technical benefits.

Description

technical field [0001] The invention relates to a formwork support system of a cantilevered structure, in particular to a formwork support system and a construction method of a high-rise cantilevered structure. Background technique [0002] There are super-long overhangs on the upper part of high-rise buildings, which makes the formwork support unable to be erected by traditional construction techniques. The external scaffolding of high-rise buildings cannot use floor-standing scaffolding. The external scaffolding can only use cantilevered scaffolding according to the geometric shape of the building. High-rise buildings It is a big problem that there is no stress point on the cantilevered structural formwork support pole at a higher position. [0003] According to past construction experience, it is necessary to pre-embed anchor rings, pull rings and diagonal bracing pre-embedded slabs in advance according to the position of the building's cantilever structure, and pre-embed...

AI Technical Summary

Problems solved by technology

[0002] There are super-long overhangs on the upper part of high-rise buildings, which makes the formwork support unable to be erected by traditional construction techniques. The external scaffolding of high-rise buildings cannot use floor-standing scaffolding. The external scaffolding can only use cantilevered scaffolding according to the geometric shape of the building. High-rise buildings It is a big problem that there is no stress point on the cantilever structure formwork support pole at a higher position

[0003] According to past construction experience, it is necessary to pre-embed anchor rings, pull rings and diagonal bracing pre-embedded slabs in advance according to the position of the building's cantilever structure, and pre-embed the diagonal bracing pre-embedded slabs when constructing the lower floor structure of the cantilever structure The height of the embedded slab is strictly controlled during the installation of the traditional construction embedded slab. The height of the embedded slab must be 1~2cm higher than that of the structural slab, so as to avoid the concrete covering the embedded slab when the structural concrete is poured. The specific operation of this construction method is more difficult

[0004] During the installation process of the cantilevered I-beam in the traditional construction method, the position of the structural plate should be protected by laminates. If the oblique support is too long, the oblique support will be variable and the bending resistance will be reduced. Channel steel can be used to place all the oblique supports in the middle of the support. Integral connection, its function is similar to the crossbar in the scaffolding, if the floor height is high, resulting in too long oblique support length, the channel steel spacing can be adjusted appropriately, this construction method still has some shortcomings

Images