One-time slip-form construction method for multi-layer platform chimney with square variable cross-section under high wind pressure

Abstract

Disclosed is a one-time slip-form construction method for a square variable-section multi-layer platform chimney under high air pressure. The method includes the steps of performing construction preparation, performing measurement and paying off, performing up-regulation of lead screws and primary slip construction, measuring the perpendicularity, checking a center line, taking deviation correction measures, pre-embedding steel plates, vertically suspending in-mold steel pipes at a formwork upper opening between steel bars and a formwork, pouring concrete, controlling the variable section, welding an octagonal overall platform support, performing platform structure construction and pouring platform structure concrete; after the concrete strength is detected to be qualified, platform steel pipe supports of the corresponding layers are dismantled; and a framed bent is set up on a first-layer platform, and structural construction of a second-layer platform is continued till the whole operation is finished. By means of the one-time slip-form construction method for the square variable-section multi-layer platform chimney under high air pressure, the construction efficiency can be improved, and the constriction period is shortened; by double check of a laser plummet and a big line hammer, the perpendicularity of the chimney can be accurately monitored; the steel plates are pre-embedded at the intersection nodes of platform beams and a barrel, so that steel bar anchoring at the beam end intersections is successfully achieved; and temporary platform supports are arranged, the integrity and rigidity of the barrel in the construction process are improved, and safe construction is guaranteed.

Description

Technical field [0001] The invention relates to the technical field of building construction, in particular to a one-time slip form construction method for a square variable section multi-layer platform chimney under high wind pressure, and is suitable for the slip form construction of reinforced concrete chimneys. Background technique [0002] Slipform construction is widely used in engineering construction due to its advantages of construction continuity, high degree of mechanization, fast speed, energy saving and environmental protection, and construction safety. [0003] With the rapid economic development and the acceleration of industrialization, the height design of factory chimneys is getting higher and higher. Usually, the multi-layer platform chimney adopts the construction method of "one slide and one platform", which has low construction efficiency and wastes a lot of construction time and resources. In order to realize the safe and rapid construction of the multi-layer...

AI Technical Summary

Problems solved by technology

[0003] With the rapid economic development and the acceleration of the industrialization process, the height design of factory chimneys is getting higher and higher. Usually, multi-layer platform chimneys adopt the construction method of "one slide and one platform", which leads to low construction efficiency and wastes a lot of construction time and resources.

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