Method for constructing concrete chimney cylinder body through formwork lifting process

Abstract

The invention provides a method for constructing a concrete chimney cylinder body through a formwork lifting process, which belongs to the technical field of civil engineering construction. The main content of the method provided by the invention is as follows: manufacturing a formwork, mounting a steel pipe headframe and an operating platform, mounting a manual lifter, binding up with steel bars, fastening the formwork, building an inner liner and pouring concrete. The method provided by the invention is low in one-time investment, low in construction cost, easy for combination and assembly and relatively strong in adaptability, and can perform flexible adjustment according to the diameter of a silo of a chimney, realize convenience for combination, mounting and detachment, and improve quality and work efficiency; and furthermore, the construction height of the chimney can not be limited. As the formwork lifting construction operation of the chimney is discontinuous, the method is not affected by rain and snow weather and in line with the conventional operation habit. The method provided by the invention has the advantages of fast construction speed, good appearance quality of the cylinder wall, smooth surface of the cylinder body and no rubbing traces, tension fracture or other quality common faults during sliding formwork construction.

Description

technical field [0001] The invention belongs to the technical field of civil construction, and in particular relates to a method for constructing a concrete chimney barrel by a formwork lifting method. Background technique [0002] The traditional chimney construction techniques are mainly inverted mold method and hydraulic sliding form method. The inverted mold method adopts shaped steel templates to assemble and form a circle. After the first mold is constructed, the lower mold is removed and the upper mold is inverted. Each mold needs to be reassembled and then disassembled. The process is cumbersome, the construction period is slow, the height of the stereotyped formwork cannot be adjusted, and the safety is poor. At the same time, each layer of template assembly needs to install an operating platform. The operation platform is fixed by the screw rod embedded in the cylinder wall, which consumes a lot of steel. [0003] The technological principle of the sliding form ...

AI Technical Summary

Problems solved by technology

The sliding form construction needs to be carried out continuously without interruption. The supporting steel pipes are permanently buried in the concrete of the wall after the end of the sliding form and cannot be recycled.

Large investment in equipment, materials and manpower, high construction cost, subject to certain climate conditions

During the construction process, the timing of lifting the formwork must be grasped. If it is too early, the concrete will not have the forming strength and will easily collapse; if it is too late, the formwork will stick to the concrete, and the concrete will be easily cracked. The construction technology requires high

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