Constructing method for concrete cylinder of construction steel bar of high-rise steel structure

摘要

A constructing method for a concrete cylinder of a construction steel bar of a high-rise steel structure adopts a constructing method of supporting inside and climbing outside. The outside of the cylinder adopts hydraulic mutual-climbing adhesive lifting scaffold creeping formwork system (100), and also has an outside wallboard mechanical formwork erection function and an outer frame protection function. For the inside of the cylinder, except that an appropriate structure is left for later processing according to a schedule requirement, beam walls all adopt a steel cylinder support to perform formwork erection, so as to greatly reduce the workload of repeatedly mounting/dismantling the scaffold and the formwork at a high place. The scaffold itself carries the formwork erection system, so formwork erection and formwork removal can be mechanized, thereby reducing the risk of formwork erection and formwork removal at a high place.

主权项

1. A constructing method for a concrete cylinder of a construction steel bar of a high-rise steel structure, characterized by comprising:
(1) arranging a hydraulic mutual-type adhesive lifting scaffold creeping formwork system, the climbing formwork system comprising an attaching device, an H-shaped guide rail, a scaffold body, a large formwork supporting system, a large formwork moving trolley, a climbing mechanism, an electro-control hydraulic lifting system, anti-overturning and anti-falling devices and a safeguard system; (2) manufacturing an outer wall steel back ridge plywood large formwork of the cylinder; (3) mounting the climbing formwork system at the outer side of the cylinder; (4) binding the wallboard steel bars of the cylinder; (5) mounting a wallboard inside formwork and a beam slab formwork of the cylinder, the wallboard inside formwork having back ridges; (6) the climbing formwork system climbing at the outer side of the cylinder, mounting a wallboard outside formwork of the cylinder, and closing the wallboard inside and outside formworks, wherein the wallboard outside formwork of the cylinder is the outer wall steel back ridge plywood large formwork; (7) binding the steel bars of the beam slab; and (8) carrying out concrete casting and compacting as well as concrete curing on the wallboard and the beam slab of the cylinder; the span of two adjacent positions is not more than 6 meters when the climbing formwork system is arranged linearly, and is not greater than 5.4 meters when the climbing formwork system is arranged in the form of a fold line or a curve; the scaffold body is either integrated or assembled, the cantilever length of the scaffold body is smaller than a half of the span of the scaffold body and must be not greater than 3 meters when the scaffold body is integrated and is not greater than ¼ of the span when the scaffold body is assembled; the total height of the scaffold body is 16 meters, which meets the requirement of an enclosure of 3.5-4 standard layers and the construction requirement; the outer wall steel back ridge plywood large formwork in step 2 is manufactured in such a manner that 10# channel steel and a square timber with a size of 100 mm×100 mm are used as back ridges to cover a plywood with a size of 915 mm×1830 mm×18 mm, and a square timber with a size of 48 mm×70 mm is held at the joint of the large formworks; in step 3, the H-shaped guide rail and the scaffold body of the climbing formwork system are mounted on the wallboard of the cylinder by the attaching device, so as to complete mounting of the climbing formwork system; the attaching device comprises an embedded steel sleeve, a crossing bolt and a wall-attaching device; step of mounting the scaffold body of the climbing formwork system by the attaching device is as follows: if the climbing formwork system needs to be mounted on a certain layer of the cylinder, a steel sleeve with a size of Φ60 mm×2.5 mm is embedded at the location 600 mm below structural floor when the steel bars of the wallboard or the beam slab at this layer are bound, the steel sleeve is filled with foams, two ends of the steel sleeve are sealed by adhesive tapes, and the length of the steel sleeve is identical to the thickness of the wallboard at the embedment location; after the civil structure of this layer is finished, an M48 crossing bolt is mounted at the embedded steel sleeve once the compressive strength of concrete reaches 10 Mpa or above, the inner side of the crossing bolt is fixed on the wallboard of the cylinder through a nut, the outer side of the crossing bolt is fixed with the wall-attaching device through a nut; and the H-shaped guide rail and the scaffold body of the climbing formwork system are fixed at the outer side of the wallboard of the cylinder at this layer through the wall-attaching device; binding the wallboard steel bars in step 4 is implemented by using the scaffold body of the climbing formwork system as an operating frame; the support structure for the wallboard inside formwork and the beam slab formwork in step 5 is set up using a steel cylinder fastener-type scaffold, and both the wallboard inside formwork and the beam slab formwork are plywoods; step 6 specifically comprises that: after the strength of the outer wall concrete of the cylinder at the lower layer meets the requirement of formwork stripping and the compressive strength reaches 10 Mpa or above, the wallboard outside formwork is horizontally moved out of this layer by moving the large formwork moving trolley of the climbing formwork system, and the crossing bolt and the wall-attaching device are mounted at the location of the embedded steel sleeve at this layer, afterwards, the electro-control hydraulic lifting system is operated to enable the H-shaped guide rail to climb from the more lower layer to this layer and to be fixed with the wall-attaching device at this layer, then the electro-control hydraulic lifting system is operated again to also enable the scaffold body to climb up by one layer along the H-shaped guide rail through the climbing mechanism and to be fixed with the wall-attaching device, the wallboard outside formwork correspondingly ascends from the lower layer to the upper layer at which the steel bars are properly bound, the large formwork moving trolley is moved to horizontally move the wallboard outside formwork towards the wallboard, closing of the wallboard inside and outside formworks is completed when the wallboard outside formwork is moved to a designated location, and during closing, the outer wall steel back ridge plywood large formwork is connected and fixed with the back ridges on the wallboard inside formwork of the cylinder by a crossing bolt having a diameter Φ of 12 mm; binding the steel bars of the beam slab of the cylinder in step 7 is implemented by using the scaffold body of the climbing formwork system as a circumferential protection frame.