Accurate-positioning type precast concrete stair

Abstract

The invention discloses an accurate-positioning type precast concrete stair. The accurate-positioning type precast concrete stair comprises a precast stair body on which steps are arranged, wherein the steps are provided with connecting blocks at the topmost end and the bottommost end of the precast stair body; at least two prepared mounting holes which are waist-shaped holes are formed in the upper surfaces of the connecting blocks; arc-shaped bumps are arranged below the connecting blocks; limiting strips are arranged at the outer sides of the connecting blocks; the bumps are vertical to thelimiting strips through different planes. According to the accurate-positioning type precast concrete stair, the arc-shaped bumps are utilized for quickly positioning and accurately positioning; reserved reinforced steel bars are inserted into the waist-shaped prepared mounting holes; the operation is quick and convenient; the precast stair is treated as an independent accessory and free from thestressing of the whole structure, so that the damping performance of the precast stair is high, and as a result, an escape way is kept smooth, and the safety is improved.

Description

technical field [0001] The invention belongs to the technical field of prefabricated stairs, in particular to a concrete prefabricated staircase with accurate positioning. Background technique [0002] In normal stair construction, the formwork is usually set up on site, the steel bars are bound, the concrete is poured, and the concrete is continuously watered and cured for 14 days before the concrete reaches the strength standard. Guardrails, the whole process is labor-intensive, the sewage and dust noise are serious, and the stairs are integrated with the building, so the earthquake resistance is not good. During the earthquake, the vibration generated by the upper and lower floors will directly act on the stairs, causing the stairs to break, collapse and even be destroyed. [0003] In recent years, the concept of prefabricated stairs has been proposed: the stairs are prefabricated in the factory with tooth plates and formwork, and installed directly after arriving at the ...

AI Technical Summary

Problems solved by technology

However, this kind of prefabricated stairs has high requirements for hoisting operation, and the pre-embedded steel bars are difficult to penetrate into the steel bar positioning holes at both ends of the prefabricated stairs, and the installation is not convenient and flexible enough.

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