Precast beam type scissor stair and construction method thereof

A construction method and technology of prefabricated beams, applied in the direction of stairs, ladder-like structures, pedals, etc., can solve the problems of poor fire performance, excessive building materials, inconvenient transportation, etc., and achieve reduced usage, high durability and wear resistance , Excellent bending and cracking resistance

Active Publication Date: 2021-09-07
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a prefabricated beam-type scissors staircase and its construction method to solve the problems of inconvenient transportation, inconvenient assembly, poor fireproof performance, many building materials and high cost in the existing scissors staircase

Method used

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  • Precast beam type scissor stair and construction method thereof
  • Precast beam type scissor stair and construction method thereof
  • Precast beam type scissor stair and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A prefabricated beam-type scissors staircase, comprising two reversely installed staircase bodies 1 and a beam-type platform slab 2, wherein:

[0070] The stair body 1 includes a stair section 11 and an L-shaped tread plate 12. The front of the stair section is provided with a vertical step hole I111 and a flat hole I112 on the kick surface. In the hole I112, the vertical end of the L-shaped step plate 12 is installed in the step vertical hole I111 of the stair section 11. The ladder section 11 and the beam platform slab 2 are poured from prestressed tendons, reinforced mesh, ultra-high performance concrete, gypsum powder, and gypsum fibers. The volume ratio is: 1:1:0.004; and the hollow between the L-shaped step plate 12 and the step section 11 is filled with sound-absorbing material 4, and the sound-absorbing material 4 is made of ceramsite material or sponge material.

[0071] The beam-type platform slab 2 is fixedly connected to the wall, and the beam-type platform...

Embodiment 2

[0073] A prefabricated beam-type scissors staircase, its basic structure is the same as that of Embodiment 1, the difference is that: the staircase body 1 also includes a stair lengthening part 13, and the stair lengthening part 13 is made of prestressed tendons and reinforcement mesh , ultra-high performance concrete, gypsum powder, and gypsum fiber, the volume ratio between the ultra-high performance concrete, gypsum powder, and gypsum fiber is: 1:1:0.003; Stepping vertical hole II131; the tail of the ladder section 11 has a kicking surface flat hole II114, and the ladder section extension part 13 and the tail of the ladder section 11 pass through the L-shaped tread plate installed in the stepping vertical hole II131 and the kicking surface flat hole II114 12 connected together; it can effectively make up for the insufficient length of the ladder section caused by the calculation deviation. A reinforced steel plate 132 is pasted on the back side of the joint; and the hollow ...

Embodiment 3

[0081] A prefabricated beam-type scissors staircase, the basic structure of which is the same as that of Embodiment 2, the difference is that: the staircase also includes a beam 5 and a support column 6; one end of the beam 5 is connected to the wall, and the other end sequentially traverses the The two reversely installed stair sections are then fixed on the wall on the other side; the support column 6 is formed by pouring jacks and ultra-high performance concrete, the top of the support column 6 is connected to the back of the stair section, and the support column The bottom of 6 is fixed on the floor.

[0082] The specific structure of the prefabricated beam type scissors staircase described in the present embodiment three is as follows:

[0083] A prefabricated beam-type scissors staircase, including two reversely installed staircase bodies 1, beam-type platform slabs 2, beams 5 and support columns 6, wherein:

[0084] The stair body 1 includes a stair section 11, an L-sh...

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Abstract

The invention discloses a precast beam type scissor stair and a construction method thereof, and relates to a stair and a construction method thereof. The stair comprises two stair bodies and beam type platform plates which are installed reversely, each stair body comprises a stair section and an L-shaped step plate, the horizontal end of each L-shaped step plate is installed in a raking riser flat hole I of one stair section, the vertical ends of the L-shaped step plates are installed in step vertical holes I of the stair sections, the stair sections and the beam type platform plates are connected together through connecting devices, and the method comprises the following steps of correspondingly pouring the stair sections and the beam type platform plates by using prestressed tendons, reinforcing steel bar reinforcing nets, ultra-high performance concrete, gypsum powder and gypsum fibers, then connecting the stair sections and the beam type platform plates together, and installing the L-shaped step plates on the stair sections. According to the precast beam type scissor stair and the construction method thereof, the stair sections, the L-shaped step plates and the beam type platform plates are prefabricated separately, the self weight can be reduced, transportation is convenient, assembling is easy, the stair has higher fire resistance and higher strength due to the adoption of the gypsum powder and the gypsum fibers, the use amount of the ultra-high performance concrete can be reduced, and cost is saved.

Description

technical field [0001] The invention relates to a staircase and its construction method, in particular to a prefabricated beam scissors staircase and its construction method. Background technique [0002] The traditional scissor-type staircase has a complicated construction process due to its relatively complicated force-bearing principle, which requires more man-hours and is more difficult for workers to construct; since the scissor-type staircase is a set of straight ladders in opposite directions, it requires more than ordinary stairs. More building materials will increase the cost accordingly, and the scissor staircase is a special kind of fire-fighting staircase, which needs to go up and down at the same time, so it has high fire protection requirements and high requirements for materials; due to the long construction period of the cast-in-place staircase, The use of reinforced concrete has the problems of heavy weight, large amount of formwork, environmental pollution ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04F11/02E04F11/022E04F11/104E04F11/116
CPCE04F11/02E04F11/022E04F11/104E04F11/116E04F2011/0212E04F2011/1047
Inventor 钱凯李治张敏王强刘其舟黄伟灼
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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