CN117188780A - Steel stair hoisting method - Google Patents
Steel stair hoisting method Download PDFInfo
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- CN117188780A CN117188780A CN202311192734.XA CN202311192734A CN117188780A CN 117188780 A CN117188780 A CN 117188780A CN 202311192734 A CN202311192734 A CN 202311192734A CN 117188780 A CN117188780 A CN 117188780A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 98
- 239000010959 steel Substances 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010276 construction Methods 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims description 28
- 238000012544 monitoring process Methods 0.000 claims description 3
- 101100449814 Arabidopsis thaliana GTL1 gene Proteins 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
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- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a steel stair hoisting method, which comprises the following steps: s1, lifting the steel stair by adopting an integral assembly and integral lifting construction method for installation construction. The invention can realize the hoisting precision of the steel stair.
Description
Technical Field
The invention relates to the field of steel stair hoisting, in particular to a steel stair hoisting method.
Background
Along with the large-area application of the fabricated concrete structure, a large number of prefabricated components need to be hoisted and installed in the construction process of the prefabricated building, and as a large number of prefabricated components such as prefabricated stairways are made of reinforced concrete, the weight of the components is large, the hoisting is carried out by adopting a large-scale tower crane, the hoisting height is high, and the hoisting precision is lacking 。
Disclosure of Invention
The invention aims to provide a steel stair hoisting method, which aims to solve the problem of steel stair hoisting.
The invention provides a steel stair hoisting method, which comprises the following steps:
s1, lifting the steel stair by adopting an integral assembly and integral lifting construction method for installation construction.
By adopting the embodiment of the invention, the hoisting precision of the steel stair can be improved.
The foregoing description is only an overview of the present invention, and is intended to provide a more clear understanding of the technical means of the present invention, as it is embodied in accordance with the present invention, and to make the above and other objects, features and advantages of the present invention more apparent, as it is embodied in the following detailed description of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a steel stair construction of a method for lifting a steel stair according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a steel cable and lifting points of a steel stair lifting method according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Method embodiment
According to the embodiment of the invention, a steel stair hoisting method is provided, which specifically comprises the following steps:
s1, lifting the steel stair by adopting an integral assembly and integral lifting construction method for installation construction.
S1 specifically comprises: s11, after the steel member is transported to the site from a processing plant, welding and assembling the profile steel by matching with a welding method of submerged arc automatic welding;
s12, after the positioning axis, the foundation axis, the elevation and the like of the building are checked to meet the requirements, hoisting and installing the steel stair;
s13, using the positioning axis and elevation of the building, placing the GPS positioning device at the lifting position to implement the GPS positioning function on the steel stair, and monitoring whether the coordinates at the lifting point are identical with the original coordinates in real time after the GPS positioning device is connected with a computer until the steel stair is lifted to the set position, and finally connecting the steel stair with the embedded part.
S11 specifically comprises: after the steel member is transported to the site from a processing plant, welding and assembling the profiled steel, and prefabricating an assembling jig frame on the site before assembling the whole steel stair, wherein the steel stair is assembled on the jig frame, and the welding seam adopts fillet welding girth welding.
S12 specifically comprises the following steps: after the positioning axis, the foundation axis, the elevation and the like of the building are inspected to meet the requirements, the steel stairway is hoisted and installed, the hoisting is carried out in a mode of combining GPS positioning and hoisting processes, two steel ropes are pulled out from one end of the main structure frame column on the structural layer installed on the uppermost steel stairway, the steel ropes are connected with the other two ends of the frame column, two hoisting points are fixed on the two steel ropes, and the steel ropes enter the two hoists through the guiding of pulleys and are hoisted by the two hoists.
Welding and assembling the section steel specifically comprises the following steps: and welding and assembling the profile steel, and matching with a welding method of submerged arc automatic welding.
The upper and lower flange plates and the web splice should be offset a distance.
The specific implementation method is as follows:
FIG. 1 is a schematic view of a steel stair construction of a method for lifting a steel stair according to an embodiment of the present invention;
a large-span stairway with a semi-annular steel structure without an intermediate column adopts a mode that special-shaped rectangular steel beams are combined with channel steel as a main body stress structure (special-shaped rectangular steel beams). The column structure adopts Q345 steel, and the secondary structure adopts Q235 steel. The radius of the circle of the steel ladder beam center line of the outer ring of the steel stair is 9100mm, and the radius of the circle of the steel ladder beam center line of the inner ring is 7110mm.
The steel ladder beams 1 and 2 (GTL 1 and GTL 2) are main stress members of the steel stairs, and are required to resist lateral bending and torsion besides bearing stair loads and upper loads; the steel ladder beam 3 (GTL 3) transmits force to the GTL1 and the GTL2, and simultaneously the support of the compression flanges of the GTL1 and the GTL2 is increased to reduce the lateral free length of the steel ladder beam so as to improve the overall stability of the steel ladder; the use of the channel steel enables the loading of the ladder plate and the upper part to be better transferred to the GTL1 and the GTL2. The use of the GTL 1-GTL 3 special-shaped rectangular pipes increases the height of the web plate, and improves the strength and rigidity of the steel stair; the width of the flange is widened, and the overall stability of the steel stair is improved. The steel ladder beam and the channel steel are used as stress members to bear the external and transverse loads of the vertical load of the steel stairs.
Because the steel stairway is limited by the condition of the construction site, the steel stairway cannot be hoisted by adopting a hoisting machine, and the steel stairway is hoisted by adopting an integral assembly and integral hoisting construction method in combination with the actual condition of the construction site.
Firstly, after a steel member is transported to a site from a processing plant, welding and assembling are carried out on the profile steel by matching with a welding method of submerged arc automatic welding. Because the whole steel stair is semi-annular, an assembly jig frame is prefabricated on site before assembly, and the steel stair is assembled on the jig frame. The welding seam is full-length full-welded along the whole length of the member, the upper flange plate and the lower flange plate of the welded section steel are not provided with longitudinal splicing seams, only transverse splicing is allowed, and the web plates can be longitudinally and transversely spliced, but the splicing seams of the flange plates and the web plates are staggered by more than 200mm so as to avoid the intersection of the welding seam and the concentration of the defect of the welding seam.
And secondly, after the positioning axis, the foundation axis, the elevation and the like of the building are checked to meet the requirements, hoisting and installing the steel stair. Because the length of the steel stair is longer, the hoisting is performed in a mode of combining GPS positioning and lifting and hoisting technology in order to ensure the stability of the steel stair in the hoisting process. Two steel ropes are pulled out from one end of the main structure frame column on the structural layer installed on the uppermost steel stair by utilizing the main structure frame column, the steel ropes are connected with the other two ends of the frame column, two lifting points are fixed on the two steel ropes, and the two steel ropes enter two windlass through the guiding of pulleys and are lifted by the two windlass.
FIG. 2 is a schematic view of a steel cable and lifting points of a method of lifting a steel stair according to an embodiment of the present invention;
and (3) utilizing the positioning axis and elevation of the building, placing the GPS positioning device at a lifting position to implement a GPS positioning function on the steel stair, and monitoring whether coordinates at the lifting point are identical with original coordinates in real time after the GPS positioning device is connected with a GPS through a computer until the steel stair is lifted to a set position and finally connected with the embedded part.
The hoisting method improves the stability and the accuracy of hoisting.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; and these modifications or substitutions may be made to the technical solutions of the embodiments of the present invention without departing from the spirit of the corresponding technical solutions.
Claims (6)
1. The steel stair hoisting method is characterized by comprising the following steps of:
s1, lifting the steel stair by adopting an integral assembly and integral lifting construction method for installation construction.
2. The method according to claim 1, wherein S1 specifically comprises: s11, after the steel member is transported to the site from a processing plant, welding and assembling the profile steel by matching with a welding method of submerged arc automatic welding;
s12, after the positioning axis, the foundation axis, the elevation and the like of the building are checked to meet the requirements, hoisting and installing the steel stair;
s13, using the positioning axis and elevation of the building, placing the GPS positioning device at the lifting position to implement the GPS positioning function on the steel stair, and monitoring whether the coordinates at the lifting point are identical with the original coordinates in real time after the GPS positioning device is connected with a computer until the steel stair is lifted to the set position, and finally connecting the steel stair with the embedded part.
3. The method according to claim 1, wherein S11 specifically comprises: after the steel member is transported to the site from a processing plant, welding and assembling the profiled steel, and prefabricating an assembling jig frame on the site before assembling the whole steel stair, wherein the steel stair is assembled on the jig frame, and the welding seam adopts fillet welding girth welding.
4. The method according to claim 1, wherein S12 specifically comprises: after the positioning axis, the foundation axis, the elevation and the like of the building are inspected to meet the requirements, the steel stairway is hoisted and installed, the hoisting is carried out in a mode of combining GPS positioning and hoisting processes, two steel ropes are pulled out from one end of the main structure frame column on the structural layer installed on the uppermost steel stairway, the steel ropes are connected with the other two ends of the frame column, two hoisting points are fixed on the two steel ropes, and the steel ropes enter the two hoists through the guiding of pulleys and are hoisted by the two hoists.
5. The method according to claim 1, wherein the welding and assembling of the section steel comprises: and welding and assembling the profile steel, and matching with a welding method of submerged arc automatic welding.
6. The method of claim 1 wherein said upper and lower flange plates and said web splice are offset by a distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311192734.XA CN117188780A (en) | 2023-09-14 | 2023-09-14 | Steel stair hoisting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311192734.XA CN117188780A (en) | 2023-09-14 | 2023-09-14 | Steel stair hoisting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117188780A true CN117188780A (en) | 2023-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311192734.XA Pending CN117188780A (en) | 2023-09-14 | 2023-09-14 | Steel stair hoisting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117188780A (en) |
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2023
- 2023-09-14 CN CN202311192734.XA patent/CN117188780A/en active Pending
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