Construction method of cast-in-place concrete stair closed type formwork

Abstract

The invention provides a construction method of a cast-in-place concrete stair closed type formwork. The method includes the steps of firstly, positioning the paying off; secondly, erecting a bearingframe; thirdly, installing a stair bottom formwork; fourthly, preparing a side formwork, a raking riser formwork and a pedal formwork; fifthly, installing the side formwork; sixthly, installing the raking riser formwork and the pedal formwork; seventhly, installing a formwork fastening system; eighthly, conducting concrete casting; ninthly, postprocessing a plastic sleeve and an air outlet. By means of the construction method, labor can be greatly saved, and the construction cycle is shortened; after formwork detachment, concrete surfaces are smooth, the section size and sensory quality of a cast-in-place concrete stair can be effectively controlled; a small bend transition is naturally formed at the intersection of a horizontal stepping face of each step of the formed stair and the perpendicular face, and the problems that the edge missing and corner falling of the stair steps are caused by collision or scratching after formwork detachment and in the use process, sensation is affected, people are easily stumbled when not paying attention in the use process, and objects are easily broken by colliding (hooking) can be effectively avoided.

Description

technical field [0001] The invention relates to a construction method for a cast-in-situ concrete staircase, in particular to a construction method for a closed formwork for a cast-in-situ concrete staircase. Background technique [0002] The construction quality of cast-in-place concrete stairs cannot be effectively controlled and guaranteed, which affects the use function and overall appearance of the building. It has always been a problem that plagues the construction of construction projects. The usual method for the construction of cast-in-place concrete stairs is: on the basis of the completed steel structure of the stairs, set the bottom formwork, side formwork and riser formwork (that is, the step vertical formwork), the side formwork is set without steps, and the riser formwork is directly fixed on the On the side formwork, the concrete pouring formwork system for the stairs is formed, and then the concrete is poured, and the horizontal surface (tread surface) of ea...

AI Technical Summary

Problems solved by technology

The existing problems are as follows: firstly, manually leveling and finishing the treads of each step of the stairs, it is difficult to effectively ensure the flatness of the treads, the construction efficiency is low, and it is difficult to handle the smoothness between the upper and lower treads and the riser formwork, Irregular ridges or grooves will inevitably exist after the formwork is removed, which will seriously affect the use function and overall appearance of the stairs, especially the ridges at the junction of the horizontal and vertical surfaces of the stair steps will easily cause people to trip when they are not paying attention during use 1. It is easy to hit (hang) bad objects; secondly, because many people go up and down the stairs during construction, they can only step on the riser formwork up and down, which will easily cause the deformation of the riser formwork and the displacement of the riser formwork relative to the side formwork, which will affect the concrete after pouring. Stairs are regular, and people only need to step on the riser formwork or the joint between the riser formwork and side formwork, which is likely to bring safety hazards; third, the maintenance stage after the stair concrete pouring is easy to cause the stairs to lack edges due to people going up and down Few horns, leave footprints

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