Stair three-step bottom die reinforcing device, reinforcing supporting system and construction technology

Abstract

The invention relates to a stair three-step bottom die reinforcing device, a reinforcing supporting system and a construction technology. The stair three-step bottom die reinforcing device comprises asteel plate, bolts and nuts. The steel plate is provided with two or more through holes, and the centers of all the through holes are located on the same straight line L1. The distances h1 from the centers of the through holes in the two ends of the straight line L1 to the edge of the steel plate in the direction of the straight line L1 are equal, and h1 is larger than or equal to 80 mm and smaller than or equal to 150 mm. The distance d1 from the center of each through hole to one edge of the steel plate in the direction perpendicular to the straight line L1 is smaller than the distance d2 from the center of each through hole to the other edge of the steel plate, d1 is larger than or equal to 150 mm and smaller than or equal to 200 mm, d2 is equal to d1 plus c, c is the distance from thecenter of each through hole to the boundary of stair three-step cast concrete in the direction perpendicular to the straight line L1, and c is larger than or equal to 80 mm and smaller than or equalto 120 mm. The steel plate is located under a bottom die and is attached to the bottom die, the bolts penetrate through the through holes in the steel plate and the bottom die to extend to the upper portion of the bottom die to be in threaded connection with the nuts, and the nuts wrap the portions, extending to the upper portion of the bottom die, of the bolts. The stair three-step bottom die reinforcing device enhances the formwork supporting rigidity, improves the stair three-step concrete forming quality and prolongs the service period of formwork.

Description

technical field [0001] The invention relates to the technical field of stair construction joint templates for building engineering construction, in particular to a three-step bottom form reinforcement device for stairs, a reinforcement support system and a construction process. Background technique [0002] The staircase is an integral cast-in-place structure. When it cannot be poured in one time, a construction joint is formed on the joint surface of the first poured concrete and the second poured concrete. The construction joints should be left in the parts of the structure that are subject to less shear force and are convenient for construction. Since the height of the middle floors of multi-storey houses is mostly 2.9 meters, most of the stairs are two runs, so the height of one run is 1.45 meters, the height of one step is 0.15 meters, and the height of three steps is 0.45 meters, which is about 1.45 meters in total. 1 / 3 of. For the slab stairs made of stairs and plat...

AI Technical Summary

Problems solved by technology

[0005] In the three-step formwork support device on the stairs, due to the large movement of personnel during the construction of the upper floor, the requirements for the support system of the stairs are high, the formwork rigidity cannot meet the construction requirements, the bottom form and the concrete surface are separated to form gaps, and construction waste is easy. If it is stuffed into the gap, it will be more difficult to clean up, and it is easy to cause wrong platform during pouring

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