Accurate-positioning type precast concrete stair
A concrete and staircase technology, applied in the direction of stairs, etc., can solve the problems of high hoisting operation requirements, difficult penetration of steel bars, inconvenient and flexible installation, etc., to achieve high earthquake resistance, ensure smoothness, and increase safety.
Pending Publication Date: 2018-01-16
JIANGSU JINMAO TECH DEV
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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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[0019] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer ” refer to directions towards or away from the geometric center of a particular part, respectively.
[0020] As shown in the figure, a concrete prefabricated staircase with accurate positioning according to the present invention includes a prefabricated staircase body 1, and a step 2 is provided on the prefabricated staircase body 1, and the steps 2 are connected at the uppermost and lowermost ends of the prefabricated staircase body 1. Block 3, the upper surface of the connect...
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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 ...
Claims
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Inventor 胡峻胡友华花旺袁荣荣陆春泰朱振华
Owner JIANGSU JINMAO TECH DEV