Formwork structure for sealing of cast-in-situ stairs and reversed concrete pouring construction method of formwork structure

Abstract

The invention provides a formwork structure for sealing of cast-in-situ stairs and a reversed concrete pouring construction method of the formwork structure. The construction method comprises steps as follows: laying of a stair plate bottom formwork, mounting of ladder beams and platform plate formworks, erection of supporting frames, binding of steel bars for the stairs, layout of split heads, mounting of outer holding plates, mounting of horizontal and longitudinal step formworks, mounting of angle steel, reinforcement through upper and lower formworks of the stairs, reinforcement through side formworks of the stairs, concrete pouring and curing and detachment and circulating use of the bottom formwork and the outer holding plates. The formwork structure and the construction method have the benefits as follows: the upper surfaces of the stair steps are sealed through the formworks, concrete can be effectively prevented from overflowing, and materials are saved; concrete pouring is performed from the bottoms to the tops of the stairs, and vibration for compaction is performed during pouring.

Description

technical field [0001] The invention relates to the field of floor slab construction, in particular to a closed formwork structure for a cast-in-situ staircase and a construction method for pouring concrete back. Background technique [0002] During the construction of cast-in-place stairs, the steps of the steps are usually separated by formwork, the top surface of the steps is hollowed out, and the concrete is poured from the hollowed out surface. The following problems exist in the construction process: [0003] The concrete pouring of stair steps cannot be carried out continuously, which is time-consuming and labor-intensive. Due to the different elevations of the steps of the stairs, it is advisable to pour concrete from the lower part of the stair to the upper part. When pouring the upper concrete, if the concrete is highly fluid, the lower concrete will overflow the formwork due to the gravity of the upper concrete. Therefore, it is necessary to wait for the concrete ...

AI Technical Summary

Problems solved by technology

[0004] Stairs cannot be used as a vertical transportation channel before the final setting of the concrete

Before the final setting of the concrete on the stairs, if people walk on the steps, it is easy to leave footprints on the steps, which will affect the quality of the concrete

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