Prefabricated vertical access for steel structure installation and steel structure construction methods

Abstract

This invention relates to the field of steel structure construction technology, and discloses a prefabricated vertical passage for steel structure installation and a steel structure construction method. The vertical passage includes: connecting lugs fixed to the steel columns on which the vertical passage is located, with mounting holes on them; several first and second ladders, each including two first ladder columns and several steps between the two first ladder columns, with mounting holes at both ends of the first ladder columns; several third ladders, each including two second ladder columns and several steps between the two second ladder columns, with several mounting holes on the second ladder columns, and the length of the third ladders being less than the length of the first ladders; wherein the third ladders are located between the first and second ladders, and the ends of the first and second ladders are bolted to the connecting lugs; a third ladder is provided at each floor slab location. This vertical passage requires no welding on the construction site, is easy to assemble and disassemble, has strong adaptability, and can improve construction safety and efficiency.

Description

Technical Field

[0001] This invention relates to the field of steel structure construction technology, specifically to a prefabricated vertical passage for steel structure installation and a steel structure construction method. Background Technology

[0002] In existing steel structure construction processes, steel ladders are commonly used as temporary vertical passages. They are typically connected and fixed to the main structure by welding, and this welding and installation must be completed on the ground at the construction site. This approach has the following drawbacks: (1) Before the steel column is hoisted, the steel ladder needs to be welded on site, which increases the construction process and is prone to environmental pollution and safety hazards. Under the conditions of strong wind or relevant environmental warning, hot work is restricted, which often leads to the inability to set up safety protection measures in time, thereby affecting the hoisting process and causing delays in the construction period. (2) When the steel column is unloaded, its upward side is random and lacks intuitive orientation markings. Construction workers are prone to positioning errors when welding and installing the steel ladder, resulting in the steel ladder being located on the exterior of the main structure or the upper and lower sections of the steel ladder being in different orientations, which poses a safety hazard. (3) The vertical through structure of the steel ladder is prone to interference with the floor slab laying construction. When interference occurs, part of the steel ladder needs to be removed. At the same time, since the steel ladder and the steel column are welded together, cutting and grinding are required during the removal process, which makes the removal process complicated and time-consuming. Furthermore, if the removal is delayed, it will affect the construction of subsequent processes. (4) The floor heights of different projects vary. The existing steel ladders set according to the standard module are not adaptable enough during the turnover and use, and it is difficult to meet the diverse construction needs. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a prefabricated vertical passage for steel structure installation and a steel structure construction method. This vertical passage requires no welding on the construction site, is accurately positioned and not prone to misalignment, and is easy to assemble and disassemble with strong adaptability, effectively improving construction safety and efficiency.

[0004] According to one embodiment of the present invention, a prefabricated vertical passage for steel structure installation is provided, comprising: a connecting lug plate fixed to a steel column on which the vertical passage is located, having mounting holes thereon; a plurality of first ladders and second ladders, each including two first ladder columns and a plurality of treads disposed between the two first ladder columns, the two ends of the first ladder columns having mounting holes, the length of the second ladder being greater than the length of the first ladder, and the widths of the second ladder and the first ladder being the same; a plurality of third ladders, each including two second ladder columns and a plurality of treads disposed between the two second ladder columns, the second ladder columns having a plurality of mounting holes, the length of the third ladder being less than the length of the first ladder, and the width of the third ladder being greater than or less than the width of the first ladder; wherein, the third ladder is disposed between the first ladders and the second ladders, the two ends of the first ladders and the second ladders are bolted to the connecting lug plate, and the two ends of the third ladder are bolted to the first ladders and the second ladders respectively; the third ladder is provided at each floor slab location along the length direction of the steel column.

[0005] As one embodiment, the prefabricated vertical passage for steel structure installation further includes: a connecting adapter with mounting holes, the connecting adapter and the connecting lugs being respectively located on both sides of the first or second ladder column, and the bolts passing through the connecting lugs and the connecting adapter to fix the first, second, and third ladders to the steel column.

[0006] In one embodiment, the connecting lug is disposed on an inner side of the steel column, and the position of the connecting lug on the inner side is opposite to the approach direction of the steel beam on the steel column.

[0007] In one embodiment, the first ladder post is made of angle steel, the second ladder post is made of flat steel, and the treadle is made of round steel; the treadle is welded together with the first ladder post and the second ladder post by double-sided fillet weld.

[0008] As one embodiment, the angle steel has a specification of L50. 5. The specification of the round steel is Φ12.

[0009] In one embodiment, the width of the first ladder is 0.45m, the width of the third ladder is 0.435m, and the spacing between the steps is 0.3m.

[0010] In one embodiment, the length of the first ladder is 1m, the length of the second ladder is 3.3m, and the length of the third ladder is 0.3-0.6m.

[0011] As one implementation, at each floor slab location, the distance between adjacent first and second ladders is 0.3m.

[0012] According to one embodiment of the present invention, a steel structure construction method is provided, which adopts the above-mentioned prefabricated vertical passage for steel structure installation, including the following steps: S1, installing the first ladder, the second ladder and the third ladder on the steel column to be hoisted, wherein the third ladder is located between the first ladder and the second ladder, the two ends of the first ladder and the second ladder are bolted to the connecting lugs, and the two ends of the third ladder are bolted to the first ladder and the second ladder respectively, and the third ladder is provided at each floor slab location along the length direction of the steel column; S2, hoisting the steel column and the steel beam; S3, disconnecting the upper end of the third ladder at the floor slab location from the second ladder or the first ladder, and installing the floor slab; S4, removing the first ladder, the second ladder and the third ladder from the already laid floor slab.

[0013] In one embodiment, the first, second, and third ladders are disposed on an inner side of the steel column, and their positions on the inner side are opposite to the approach direction of the steel beams on the steel column.

[0014] Based on the above description and practice, it is clear that the main body of the prefabricated vertical passage for steel structure installation of the present invention can be connected to the steel column via connecting lug bolts. The connecting lugs can be directly welded to the steel column during factory fabrication. When installing the steel structure on the construction site, the remaining main body of the vertical passage can be quickly installed on the steel column without open flame, avoiding the risk of hoisting operations being impossible due to open flame restrictions in inclement weather. The replacement of welding with bolting further accelerates installation efficiency. The connecting lugs are pre-installed on the steel column, forming a clear directional marker, facilitating positioning during on-site handling and installation of the steel column, and preventing safety violations such as ladders being located on the exterior facade of the structure or inconsistent positioning of upper and lower ladder sections.

[0015] When constructing the floor slab, the vertical passage is located at the third ladder opposite the floor slab. By disconnecting the third ladder from the ladder above it, the third ladder can be suspended on the ladder below, which can quickly create space for floor slab construction without affecting the normal construction of the floor slab.

[0016] This vertical passageway features first, second, and third ladders of varying lengths, allowing users to adjust the type and number of ladders between floors according to the actual floor height of their project, thus adapting it to different projects. The vertical passageway is highly adaptable during reuse, meeting diverse construction needs. Furthermore, the ladders are bolted to the steel columns, facilitating dismantling. Dismantling operations are performed on the existing floor slab, significantly improving the safety and efficiency of the demolition work. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the usage state of a prefabricated vertical passage for steel structure installation, as described in one embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the connection structure of the first ladder, the second ladder, and the third ladder in a prefabricated vertical passage for steel structure installation according to one embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the connecting lug and connecting adapter in a prefabricated vertical channel for steel structure installation according to one embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the intersection between the prefabricated vertical passage for steel structure installation and the floor slab in one embodiment of the present invention.

[0021] The attached figures are labeled as follows: 11. First ladder; 12. Second ladder; 13. Third ladder; 14. Connecting ear plate; 15. Connecting adapter; 21. First ladder column; 22. Second ladder column; 23. Step bar; 31. Steel column; 32. Floor slab. Detailed Implementation

[0022] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0023] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0024] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] like Figures 1 to 4 As shown in this embodiment, a prefabricated vertical passage for steel structure installation is disclosed, mainly used to provide temporary vertical passages for construction workers to climb up and down during the construction of steel structure buildings. The prefabricated vertical passage mainly includes connecting lugs 14, a first ladder 11, a second ladder 12, and a third ladder 13.

[0026] The connecting lug 14 is fixed to the steel column 31 where the vertical passage is located, and it is provided with mounting holes. The connecting lug 14 is pre-welded and fixed to the designated position on the inner side of the steel column 31 during the factory manufacturing stage, eliminating the need for on-site welding. It also serves as a directional indicator, allowing construction personnel to quickly determine the orientation of the steel column 31 during loading, unloading, and on-site installation, ensuring that the ladder is always located inside the structure.

[0027] Both the first ladder 11 and the second ladder 12 consist of two first ladder posts 21 and several steps 23 located between the two first ladder posts 21. Each of the two ends of the first ladder post 21 has mounting holes for bolting and fixing to the connecting lug plate 14 or the third ladder 13. The first ladder 11 and the second ladder 12 have the same width, but the length of the second ladder 12 is greater than the length of the first ladder 11.

[0028] The third ladder 13 consists of two second ladder posts 22 and several steps 23 located between the two second ladder posts 22. Each second ladder post 22 has several mounting holes along its entire length, facilitating bolt connection to the first ladder 11 or the second ladder 12 at different locations. The length of the third ladder 13 is less than the length of the first ladder 11.

[0029] The third ladder 13 is positioned between the first ladder 11 and the second ladder 12, for example, between two adjacent first ladders 11, two adjacent second ladders 12, or between adjacent first ladders 11 and second ladders 12. Along the length of the steel column 31, a third ladder 13 is provided at each floor slab 32 location. During the hoisting phase of the steel column 31, the third ladder 13 is fixed between adjacent first ladders 11 and second ladders 12, ensuring the vertical passage remains continuous for construction workers to climb. At each floor slab 32 location, the distance between adjacent first ladders 11 and second ladders 12 is 0.3m. This distance is the temporary disconnection distance for the vertical passage within the structural range of the floor slab 32. The third ladder 13 positioned at this location allows for the connection and disconnection of the vertical passage when needed, facilitating construction of the floor slab 32.

[0030] The two ends of the first ladder 11 and the second ladder 12 are connected to the connecting ear plate 14 by bolts. The two ends of the third ladder 13 are connected to the first ladder 11 and the second ladder 12 by bolts, thereby firmly fixing the vertical passage to the steel column 31 and ensuring a high level of safety for construction workers when climbing up and down.

[0031] The main body of the prefabricated vertical walkway for steel structure installation can be bolted to the steel column 31 via connecting lugs 14. The connecting lugs 14 can be directly welded to the steel column 31 during factory fabrication. During on-site installation of the steel structure, the remaining main body of the vertical walkway can be quickly installed onto the steel column 31 without open flame, avoiding the risk of hoisting operations being impossible due to open flame restrictions in inclement weather. The connecting lugs 14 are pre-installed on the steel column 31, providing a clear directional marker, facilitating positioning during on-site handling and installation of the steel column 31, and preventing safety violations such as ladders being located on the exterior facade or inconsistent positioning of upper and lower ladder sections.

[0032] When constructing floor slab 32, the vertical passage is located at the position of the third ladder 13 opposite to floor slab 32. By disconnecting the connection between the third ladder 13 and the ladder above it, the construction workers can quickly create a space for construction work on floor slab 32 without affecting the normal construction of floor slab 32.

[0033] This vertical passageway, equipped with first ladders 11, second ladders 12, and third ladders 13 of varying lengths, allows users to adjust the type and number of ladders between floors according to the actual floor height of the project, thus adapting it to different projects. This vertical passageway offers high adaptability during reuse, meeting diverse construction needs. Furthermore, the ladders are bolted to the steel columns 31, facilitating dismantling. Dismantling operations are performed on the already laid floor slabs 32, significantly improving the safety and efficiency of the dismantling work.

[0034] In this embodiment, the prefabricated vertical passage for steel structure installation also includes a connecting adapter 15 opposite to the connecting lug 14. The connecting adapter 15 has mounting holes, and the connecting adapter 15 and the connecting lug 14 are located on opposite sides of the first ladder column 21 or the second ladder column 22, respectively. Bolts pass through the mounting holes on the connecting lug 14 and the connecting adapter 15 to clamp and fix the first ladder 11, the second ladder 12, or the third ladder 13 to the steel column 31, achieving a prefabricated connection without the need for on-site welding. In this embodiment, the connecting adapter 15 is an angle steel, which has a low material cost. When the connecting adapter 15 is not provided, the first ladder column 21 or the second ladder column 22 can also be directly bolted to the connecting lug 14.

[0035] In this embodiment, the connecting ear plate 14 is disposed on an inner side of the steel column 31, and its placement is opposite to the approach direction of the steel beam on the inner side, thereby ensuring that the steel beam will not interfere with the ladder during installation, and at the same time ensuring that the ladder is installed in accordance with safety regulations.

[0036] In this embodiment, the first ladder column 21 is made of angle steel with a specification of L50. 5. The step bar 23 is made of round steel with a specification of Φ12. The step bar 23 is welded to the first ladder column 21 with double-sided fillet welds. These materials are all common consumables on the construction site, and the processing and manufacturing costs are low.

[0037] The width of the first ladder 11 is 0.45m, and the spacing of the steps 23 is 0.3m. Once the lengths of the first ladder 11, second ladder 12, and third ladder 13 are determined, they can be mass-produced in the factory, reducing manufacturing costs. The length of the first ladder 11 can be set according to the common floor height requirements of the project. It is mainly located at the on-site sectioning of the steel column 31, and the length of the steel column section and the thickness of the floor slab 32 need to be considered. Taking a 1.2m section above the beam as an example, the length of the first ladder 11 can be 1m. The length of the second ladder 12 should take into account the floor height and the thickness of the floor slab 32. Taking a floor height of 3.6m as an example, the length of the second ladder 12 can be 3.3m. With this structural form, one section of each of the first ladder 11, second ladder 12, and third ladder 13 can cover a single floor height portion of the project, facilitating the installation of this vertical passage on the steel column 31.

[0038] The third ladder 13 has a width of 0.435m, which is smaller than the width of the first ladder 11 (0.45m), allowing it to be inserted into the inside of either the first ladder 11 or the second ladder 12 for telescopic adjustment. By inserting bolts into different mounting holes in the third ladder 13, the connection position between the third ladder 13 and the first and second ladders 11 can be controlled, thereby adjusting the distance between the upper and lower ladders of the third ladder 13. In other embodiments, the width of the third ladder 13 can also be set to be greater than the width of the first ladder 11. When the two are assembled, the second ladder post 22 is located outside the first ladder post 21, which also allows them to be bolted together.

[0039] In this embodiment, the second ladder column 22 in the third ladder 13 is made of flat steel with a specification of PL40. 5. The step bar 23 is made of Φ12 round steel, and the step bar 23 is welded to the second ladder column 22 using double-sided fillet welds. These materials are common consumables on construction sites, and the processing and manufacturing costs are low. The length of the third ladder 13 is controlled between 0.3m and 0.6m. At each floor slab 32, the distance between adjacent first ladders 11 and second ladders 12 is 0.3m to accommodate adjustments for similar floor heights. Specifically, by inserting bolts into different mounting holes on the third ladder 13, its connection position with the upper and lower ladders can be finely adjusted, thus serving as an adjustment section to allow the vertical passage system to adapt to different floor heights within the range of 3.3m-4.2m. Users can flexibly select the type and quantity of the first ladder 11 and second ladder 12 according to the actual floor height of the project, and use the third ladder 13 as an adjustment section to allow the vertical passage system to adapt to different floor heights within the range of 3.3m-4.2m, achieving high turnover adaptability.

[0040] During the floor slab 32 installation phase, construction workers can disconnect the upper end of the third ladder 13 at the floor slab 32 location from the upper ladder, allowing the third ladder 13 to rotate downwards and be suspended and fixed to the lower ladder. This quickly creates the necessary work space for floor slab 32 installation without dismantling the entire ladder system. After floor slab 32 installation is complete, construction workers can easily and safely dismantle the ladder system on the installed floor slab 32, avoiding the safety risks of high-altitude demolition operations.

[0041] In this embodiment, a steel structure construction method is also disclosed, which adopts the aforementioned prefabricated vertical passage for steel structure installation. This provides a safe and efficient temporary vertical passage during the construction of steel structure buildings, facilitating the installation of components such as steel columns 31 and steel beams. The steel structure construction method specifically includes the following steps: Step S1: Determine the location of the ladders based on the steel structure BIM model, and weld the connecting ear plate 14 directly to the designated inner side of the steel column 31 during the factory fabrication stage. On the construction site ground, the first ladder 11, the second ladder 12, and the third ladder 13 are sequentially bolted to the connecting ear plate 14 and the connecting adapter 15, with the third ladder 13 fixed between the first ladder 11 and the second ladder 12 to ensure the vertical continuity of the passageway; along the length of the steel column 31, a third ladder 13 is installed at each floor slab 32 location.

[0042] The connecting ear plate 14 is installed on a designated inner side of the steel column 31, facing the same direction as the fall arrestor's attachment point, and its position is opposite to the approach direction of the steel beam on that inner side. This ensures that the steel beam will not interfere with the ladder during installation, while also ensuring that the ladder's installation meets safety regulations. In other words, the first ladder 11, the second ladder 12, and the third ladder 13 are all installed on an inner side of the steel column 31, and their positions on that inner side are opposite to the approach direction of the steel beam on the steel column 31, ensuring that the vertical passage meets safety regulations without interfering with the installation of the steel beam.

[0043] Step S2: Hoist the steel column 31 to complete the vertical positioning and connection of the steel column 31; then carry out the installation and welding of the steel beam.

[0044] Step S3: Before the floor slab 32 laying process begins, disconnect the bolted connection between the upper end of the third ladder 13 at the floor slab 32 position and the upper second ladder 12 or the first ladder 11 above. Rotate the upper end of the third ladder 13 to the lower position, and the third ladder 13 is suspended on the lower ladder as a whole, which can quickly form the space required for the floor slab 32 laying at this position; then proceed with the installation of the floor slab 32.

[0045] Step S4: After the floor slab 32 is laid, the workers stand on the laid floor slab 32 and dismantle the first ladder 11, the second ladder 12 and the third ladder 13 as a whole to complete the turnover and recycling of the temporary vertical passage.

[0046] This steel structure installation utilizes a prefabricated vertical walkway and steel structure construction method. By prefabricating connecting lugs 14 in the factory and assembling them with bolts on-site, it achieves on-site welding-free installation of the vertical walkway, avoiding environmental pollution, safety hazards, and the risk of work interruption under inclement weather associated with on-site welding. The connecting lugs 14 also function as orientation indicators, solving the problem of ladder positioning errors. A quickly detachable third ladder 13 is installed at the floor slab 32 location, allowing for rapid avoidance of the floor slab 32 laying work surface without dismantling the overall ladder system. The ladder system can be flexibly adjusted according to the floor height of different projects, offering strong adaptability and meeting diverse construction needs. All ladders are bolted connections, making dismantling convenient and safe after the floor slab 32 is laid, reducing the risks of working at heights and improving overall construction safety and efficiency.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A prefabricated vertical passage for steel structure installation, characterized in that, include: Connecting ear plates are fixed to the steel column where the vertical channel is located, and mounting holes are provided on them; Several first ladders and second ladders each include two first ladder posts and several treads disposed between the two first ladder posts. The two ends of the first ladder posts are provided with mounting holes. The length of the second ladder is greater than the length of the first ladder. The width of the second ladder and the first ladder is the same. A plurality of third ladders, including two second ladder posts and a plurality of steps disposed between the two second ladder posts, wherein the second ladder posts are provided with a plurality of mounting holes, the length of the third ladder is less than the length of the first ladder, and the width of the third ladder is greater than or less than the width of the first ladder. The third ladder is located between the first ladder and the second ladder. The two ends of the first ladder and the second ladder are connected to the connecting lugs by bolts. The two ends of the third ladder are connected to the first ladder and the second ladder by bolts, respectively. The third ladder is provided at each floor slab location along the length of the steel column.

2. The prefabricated vertical passage for steel structure installation as described in claim 1, characterized in that, Also includes: A connecting adapter is provided with mounting holes. The connecting adapter and the connecting lug are respectively located on both sides of the first ladder column or the second ladder column. The bolt passes through the connecting lug and the connecting adapter, so that the first ladder, the second ladder and the third ladder are fixed on the steel column.

3. The prefabricated vertical passage for steel structure installation as described in claim 1, characterized in that, The connecting lug is disposed on one inner side of the steel column, and the position of the connecting lug on the inner side is opposite to the approach direction of the steel beam on the steel column.

4. The prefabricated vertical passage for steel structure installation as described in claim 1, characterized in that, The first ladder post is made of angle steel, the second ladder post is made of flat steel, and the step bar is made of round steel. The footplate is welded together with the first and second ladder posts using double-sided fillet welds.

5. The prefabricated vertical passage for steel structure installation as described in claim 4, characterized in that, The angle steel is L50.

5. The specification of the round steel is Φ12.

6. The prefabricated vertical passage for steel structure installation as described in claim 4, characterized in that, The width of the first ladder is 0.45m, the width of the third ladder is 0.435m, and the spacing between the steps is 0.3m.

7. The prefabricated vertical passage for steel structure installation as described in claim 1, characterized in that, The first ladder is 1m long, the second ladder is 3.3m long, and the third ladder is 0.3-0.6m long.

8. The prefabricated vertical passage for steel structure installation as described in claim 1, characterized in that, At each floor slab location, the distance between adjacent first and second ladders is 0.3m.

9. A steel structure construction method, employing a prefabricated vertical passage for steel structure installation as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Install the first ladder, the second ladder, and the third ladder on the steel column to be hoisted, wherein the third ladder is located between the first ladder and the second ladder, the two ends of the first ladder and the second ladder are connected to the connecting lugs by bolts, and the two ends of the third ladder are respectively connected to the first ladder and the second ladder by bolts. Along the length of the steel column, the third ladder is provided at each floor position. S2. Hoisting steel columns and beams; S3. Disconnect the upper end of the third ladder at the floor slab location from the second ladder or the first ladder, and install the floor slab; S4. Remove the first, second, and third ladders from the already laid floor slab.

10. The steel structure construction method as described in claim 9, characterized in that, The first, second, and third ladders are disposed on an inner side of the steel column, and their positions on the inner side are opposite to the approach direction of the steel beams on the steel column.

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