Precast prestressed-concrete slab-type stair and making construction method

Abstract

The invention discloses a precast prestressed-concrete slab-type stair and a making construction method, and belongs to the technical field of constructional engineering. The precast prestressed-concrete slab-type stair structurally comprises a slab-type stair body aslant arranged, an upper stair platform, a lower stair platform, an upper stair beam and a lower stair beam; the upper stair platformis connected with the upper stair beam, the lower stair platform is connected with the lower stair beam, and the two ends of the slab-type stair body are connected with the upper stair beam and the lower stair beam respectively; ladder-shaped steps are arranged on the slab-type stair body; a prestresed reinforcing steel bar is arranged at the lower portion in the slab-type stair body in the length direction, an upper common reinforcing steel bar is arranged at the upper portion in the slab-type stair body in the length direction, and annular distribution reinforcing steel bars are arranged inthe middle in the slab-type stair body in the length direction at equal intervals, and are located between the prestresed reinforcing steel bar at the lower portion and the upper common reinforcing steel bar at the upper portion. The precast prestressed-concrete slab-type stair and the making construction method have the advantages of being large in application span, good in crack resistance, light in self weight, convenient to hoist and transport, excellent in earthquake resistance and the like.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a prefabricated prestressed concrete slab staircase and a manufacturing and construction method thereof. Background technique [0002] Stairs are very important structural components in building structures, which are responsible for important functions such as personnel flow and escape. The traditional construction method of stairs is cast-in-place, but because the stairs are inclined and irregular structural components, there are disadvantages in cast-in-place construction such as complex formwork process, time-consuming, long construction period, high construction cost and heavy environmental pollution. In addition, the two ends of the cast-in-place stairs are integrally connected with the ladder beams. During an earthquake, the stairs, as diagonal bracing members, participate in the stress of the overall structure. The earthquake effect is relatively large, wh...

AI Technical Summary

Problems solved by technology

Increased self-weight leads to difficulties in hoisting, transportation and installation of prefabricated stairs

At the same time, when the span of the staircase is large, the bottom of the slab is easily cracked during transportation and hoisting, which affects subsequent normal use

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