Rapid construction method of reinforced concrete chimney

Abstract

The invention relates to a rapid construction method of a reinforced concrete chimney. The chimney shaft construction is completed by utilizing flow construction and the arch structure stress principle to reasonably combine frame materials and a chimney self completed structure and utilizing less investment. A vertical derrick is built to lift an operating platform; the vertical transportation ofgoods is completed by applying a winding engine, a top sheave and a steel wire; a center locator is utilized to determine the central point and is fixed on the derrick; an iron wire is connected to the central point to serve as a scale mark post so as to determine the positions of a reinforcing steel bar and a template; an outer template is fastened by adopting a steel wire rope and a wire grip and the contraction of the template is regulated; the concrete chimney shaft construction, the thermal insulation layer construction and the lining acid resistance and fire resistance construction are carried out simultaneously; and a chain fall-type chain block serves as the lifting device of the template. The template surrounding of shaft concrete is gradually formed, and the casting moulding of the whole chimney shaft is completed after a thermal baffle is placed. The ladder stand construction and the operating platform construction are alternately carried out by utilizing aperture time and are synchronously completed along with the shaft wall section-by-section construction.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a rapid construction method for a reinforced concrete chimney. Background technique [0002] The construction technology of reinforced concrete chimney has a process of continuous development. In the 1970s, the construction method of derrick plus outer frame was the main method, and many chimney construction tasks were completed. Later, the sliding form construction was introduced and the sliding form technology was gradually improved. However, the sliding form construction has a lot of investment in mechanical equipment, long installation time, many difficulties in final dismantling, high construction costs, great safety hazards, and friction on the concrete during the sliding process. Transverse cracks affect the structural durability, aesthetics and other disadvantages. Later, the tripod inverted mold construction method was used, and the process has been greatly improve...

AI Technical Summary

Problems solved by technology

Its disadvantages are 1. Two operating platforms are set up, because the construction in the barrel body relies entirely on iodine tungsten lighting, and there are hidden dangers in electricity safety; 2. Although there is lighting, the labor productivity of workers is still greatly reduced; 3. Two operations The platform has a height difference of more than 20m. The vertical operation increases the protection cost and increases the unsafe factors. When the upper layer is bound with steel bars and poured concrete, the vertical crossing operation must be staggered to prevent falling objects, and the lining construction has to be suspended.

Images