Method of hoisting steel staircases

Abstract

The application discloses a steel stair hoisting method, which comprises the following steps: S1, the steel stair hoisting is hoisted and installed by adopting integral assembly and integral lifting construction method. The steel stair hoisting precision can be realized.

Description

Technical Field

[0001] This invention relates to the field of steel staircase hoisting, and in particular to a method for hoisting steel staircases. Background Technology

[0002] With the widespread application of prefabricated concrete structures, a large number of prefabricated components need to be hoisted and installed during the construction of prefabricated buildings. Since many prefabricated components, such as prefabricated stairs, are made of reinforced concrete and are heavy, large tower cranes are often used for hoisting. However, this high lifting height results in a lack of hoisting precision. 。 Summary of the Invention

[0003] The purpose of this invention is to provide a method for hoisting steel stairs, which aims to solve the problem of hoisting steel stairs.

[0004] This invention provides a method for hoisting a steel staircase, comprising:

[0005] S1. The steel staircase is installed using an integral assembly and lifting method.

[0006] By employing the embodiments of the present invention, the hoisting accuracy of steel staircases can be improved.

[0007] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0008] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of a steel staircase structure according to an embodiment of the present invention for a steel staircase hoisting method;

[0010] Figure 2 This is a schematic diagram of the steel cable and lifting point in a steel staircase hoisting method according to an embodiment of the present invention. Detailed Implementation

[0011] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0012] Method Implementation Examples

[0013] According to an embodiment of the present invention, a method for hoisting a steel staircase is provided, specifically including:

[0014] S1. The steel staircase is installed using an integral assembly and lifting method.

[0015] S1 specifically includes: S11, after transporting the steel components from the processing plant to the site, welding and assembling the steel sections using submerged arc welding;

[0016] S12. After checking that the building's positioning axis, foundation axis, and elevation meet the requirements, the steel staircase is hoisted and installed.

[0017] S13. Using the building's positioning axis and elevation, place the GPS positioning device at the lifting position to implement GPS positioning function for the steel staircase. After connecting the computer to the GPS, monitor in real time whether the coordinates at the lifting point match the original coordinates. Until it is lifted to the predetermined position, the steel staircase is finally connected to the embedded parts.

[0018] S11 specifically includes: after transporting the steel components from the processing plant to the site, welding and assembling the steel sections. The entire steel staircase is semi-circular. Before assembly, an assembly jig is prefabricated on site. The steel staircase is assembled on the jig, and the welds are made by fillet welds.

[0019] S12 specifically includes: After checking that the building's positioning axis, foundation axis, and elevation meet the requirements, the steel staircase is hoisted and installed. The hoisting is carried out using a combination of GPS positioning and lifting technology. Utilizing the main structural frame columns, two steel cables are pulled out from one end of the main structural frame column on the structural layer where the uppermost steel staircase is installed. The steel cables are connected to the frame columns at the other two ends, and two lifting points are fixed on the two steel cables. Guided by pulleys, the cables enter two winches and are then lifted by the two winches.

[0020] The specific welding and assembly of structural steel includes: welding and assembling structural steel in conjunction with submerged arc welding.

[0021] The joints of the upper and lower flanges and the web should be staggered by a certain distance.

[0022] The specific implementation method is as follows:

[0023] Figure 1 This is a schematic diagram of a steel staircase structure according to an embodiment of the present invention for a steel staircase hoisting method;

[0024] A large-span, column-free, semi-circular steel staircase uses a combination of irregularly shaped rectangular steel beams and channel steel as its main load-bearing structure (irregularly shaped rectangular steel beams). The column structure uses Q345 steel, and the secondary structure uses Q235 steel. The radius of the circle containing the centerline of the outer ring steel stair beams is 9100mm, and the radius of the circle containing the centerline of the inner ring steel stair beams is 7110mm.

[0025] Among them, steel ladder beams 1 and 2 (GTL1 and GTL2) are the main load-bearing components of the steel staircase. Besides bearing the staircase load and the load from the upper structure, they must also resist lateral bending and torsion. Steel ladder beam 3 (GTL3) transfers force to GTL1 and GTL2 while adding support to the compression flanges of GTL1 and GTL2 to reduce their lateral free length, thereby improving the overall stability of the steel staircase. The use of channel steel allows for better transfer of the stair slab and upper load to GTL1 and GTL2. The use of irregularly shaped rectangular tubes in GTL1 to GTL3 increases the web height, improving the strength and stiffness of the steel staircase; it also widens the flange width, further enhancing the overall stability of the steel staircase. Both the steel ladder beams and channel steel, as load-bearing components, must bear the vertical and lateral loads of the steel staircase.

[0026] Due to the limitations of the construction site, the steel staircase could not be hoisted using lifting machinery. Based on the actual conditions of the construction site, the steel staircase was installed using an overall assembly and lifting method.

[0027] First, after the steel components are transported from the processing plant to the site, they are welded and assembled using submerged arc welding. Since the entire steel staircase is semi-circular, an assembly jig is prefabricated on-site before assembly, and the steel staircase is assembled on the jig. The welds are full-length welds along the entire length of the component. Longitudinal splices are not permitted on the upper and lower flanges of the welded steel sections; only transverse splices are allowed. Longitudinal and transverse splices are permitted on the web, but the flange and web splices should be staggered by at least 200mm to avoid weld intersections and the concentration of weld defects.

[0028] The second step involves hoisting and installing the steel staircase after verifying that the building's positioning axis, foundation axis, and elevation meet the requirements. Due to the considerable length of the steel staircase, a combination of GPS positioning and lifting techniques is used to ensure stability during hoisting. Utilizing the main structural frame columns, two steel cables are pulled from one end of the main structural frame column on the uppermost structural layer where the steel staircase is installed. These cables are connected to the frame columns at the other two ends, and two lifting points are fixed to the cables. Guided by pulleys, the cables are then fed into two winches for hoisting.

[0029] Figure 2 This is a schematic diagram of the steel cables and lifting points in a steel staircase hoisting method according to an embodiment of the present invention;

[0030] Using the building's positioning axis and elevation, a GPS positioning device is placed at the lifting position to perform GPS positioning on the steel staircase. After connecting the computer to the GPS, the coordinates at the lifting point are monitored in real time to see if they match the original coordinates. The steel staircase is then finally connected to the embedded parts after being lifted to the designated position.

[0031] The hoisting method of this invention improves the stability and accuracy of hoisting.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions to the technical solutions of the embodiments of the present invention do not cause the essence of the corresponding technical solutions to deviate from the scope of the present solution.

Claims

1. A method for hoisting a steel staircase, characterized in that, include: S1. The steel staircase is installed using an integral assembly and lifting method. S1 specifically includes: S11, after transporting the steel components from the processing plant to the site, welding and assembling the steel sections using submerged arc automatic welding method; S12. After checking that the building's positioning axis, foundation axis, and elevation meet the requirements, the steel staircase is hoisted and installed. S13. Using the building's positioning axis and elevation, place the GPS positioning device at the lifting position to implement the GPS positioning function for the steel staircase. After connecting the computer to the GPS, monitor in real time whether the coordinates at the lifting point match the original coordinates. Until it is lifted to the predetermined position, the steel staircase is finally connected to the embedded parts. S11 specifically includes: after transporting the steel components from the processing plant to the site, welding and assembling the steel sections. The entire steel staircase is semi-circular. Before assembly, an assembly jig is prefabricated on site. The steel staircase is assembled on the jig, and the welds are made by fillet welds. S12 specifically includes: after checking that the positioning axis, foundation axis and elevation of the building meet the requirements, the steel staircase is hoisted and installed. The hoisting is carried out by combining GPS positioning and lifting hoisting technology. Using the main structural frame columns, two steel cables are pulled out from one end of the main structural frame column on the structural layer where the uppermost steel staircase is installed. The steel cables are connected to the frame columns at the other two ends, and two lifting points are fixed on the two steel cables. The cables are guided by pulleys into two winches and lifted by the two winches. The joints of the upper and lower flanges and the web should be staggered by a certain distance; The welding and assembly of the steel profiles specifically includes: welding and assembling the steel profiles in conjunction with a submerged arc automatic welding method.

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