Temporary safety passage for construction of double-core-tube refuge floor

Abstract

This utility model discloses a temporary safety passage for the construction of a refuge floor between two core tubes, including cantilevered steel beams, passage steel beams, and a hoisting cage. Multiple cantilevered steel beams are arranged at corresponding positions of the openings of the two parallel core tubes, with one end of each beam fixed to a structure on one side of the core tube via embedded steel parts, and the other end extending horizontally into the atrium area. Cantilevered steel beams on the same side are spaced apart along the front-to-back direction of the atrium. A set of passage steel beams is installed on the cantilever ends of the two cantilevered steel beams, extending along the front-to-back direction of the atrium. The front end of the passage steel beam rests on the floor slab corresponding to the front side of the core tube, and the rear end rests on the floor slab corresponding to the rear side of the core tube. The top surface of the passage steel beams serves as a safety passage, and guardrails are installed on its outer side. The hoisting cage is suspended inside the passage steel beams, forming an operating platform below them. This utility model provides a safe and stable working platform and passageway for workers at height.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and more specifically, to a temporary safety passage for the construction of a refuge floor between two core tubes. Background Technology

[0002] In modern supertall buildings, a "core tube-outer frame" structural system is often used. When two or more core tubes are arranged side by side, a huge atrium space is formed between them to enhance the building's lighting and sense of space. As an important safety facility in supertall buildings, the refuge floor's floor slab needs to be enclosed in the atrium area.

[0003] Traditional atrium area floor slab construction faces significant challenges:

[0004] 1. High working surface and large span: The atrium area is usually located hundreds of meters in the air and has no floor slab support below, so it is impossible to set up traditional full-span scaffolding or support frame, making the operation extremely risky.

[0005] 2. Construction safety is difficult to guarantee: When workers are installing steel beams and welding at heights, there is a lack of safe and stable operating platforms and walking passages, posing a significant risk of falls from heights and being struck by objects.

[0006] 3. Low construction efficiency: Due to the complexity of safety measures and cumbersome procedures, the construction progress is often slow, affecting the overall construction period.

[0007] 4. Difficulty in installing temporary structures: How to reliably fix temporary support structures to the walls or floors of the core tube while avoiding damage to the permanent structure is a technical challenge.

[0008] Therefore, there is an urgent need for a safe, efficient, and reliable specialized technology to solve the construction challenges of the refuge floor slab in a high-altitude, large-span atrium area. Utility Model Content

[0009] The purpose of this utility model is to provide a temporary safety passage for the construction of a refuge floor between two core tubes, providing a safe and stable working platform and passageway for high-altitude workers, so as to solve the problems of high safety risks and low efficiency in the construction of floor slabs in high-altitude, large-span atrium areas in the prior art.

[0010] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0011] A temporary safety passage for the construction of a refuge floor between two parallel core tubes is provided, located in the atrium area formed between the two core tubes. It includes cantilevered steel beams, passageway steel beams, and a hoisting cage. Multiple cantilevered steel beams are arranged at corresponding positions of the openings in the two parallel core tubes, with one end fixed to a structure on one side of the core tube via embedded steel parts, and the other end extending horizontally into the atrium area to form a cantilever end. Cantilevered steel beams on the same side are spaced apart along the front-to-back direction of the atrium. A set of passageway steel beams is installed on the cantilever ends of the cantilevered steel beams on both sides, extending along the front-to-back direction of the atrium. The front end of the passageway steel beam rests on the floor slab corresponding to the front side of the core tube, and the rear end rests on the floor slab corresponding to the rear side of the core tube. The top surface of the passageway steel beam serves as a safety passage, and a guardrail is installed on its outer side. The hoisting cage is suspended inside the passageway steel beam, forming an operating platform below the passageway steel beam for installation personnel.

[0012] As a preferred embodiment of this utility model, the steel embedded part includes a floor slab embedded part and a first wall post-embedded part. The floor slab embedded part is embedded in the floor slab inside the core tube, and the first wall post-embedded part is re-embedded in the wall where the fire elevator opening has been installed. Among the multiple cantilever steel beams, some cantilever steel beams are welded to the floor slab embedded part, and other cantilever steel beams are welded to the first wall post-embedded part.

[0013] As a preferred embodiment of this utility model, the temporary safety passage for the construction of the refuge floor between the two core tubes further includes a tie rod and a second wall-mounted component. The second wall-mounted component is embedded in the wall where the fire elevator opening has been installed and is located above the first wall-mounted component. The upper end of the tie rod is welded to the second wall-mounted component, and the lower end of the tie rod is welded to the cantilevered steel beam.

[0014] As a preferred embodiment of this utility model, a first embedded steel plate is embedded in the floor slab corresponding to the front side of the core tube, and a second embedded steel plate is embedded in the floor slab corresponding to the rear side of the core tube; steel bases are welded onto the first embedded steel plate and the second embedded steel plate respectively, the top surface of the steel base is at the same height as the top surface of the cantilever steel beam, and the bottom of the front and rear ends of the channel steel beam are respectively installed on the top surface of the corresponding steel base by bolts.

[0015] As a preferred embodiment of this utility model, the channel steel beam is installed on the top surface of the cantilever steel beam by bolts.

[0016] As a preferred embodiment of this utility model, the channel steel beam is composed of two steel sections laid side by side.

[0017] As a preferred embodiment of this utility model, each of the steel sections is formed by splicing multiple sections of I-beams sequentially along the front-to-back direction of the atrium; adjacent sections of I-beams are connected by clamps and bolts.

[0018] As a preferred embodiment of this utility model, the guardrail is composed of uprights, steel wire ropes, and turnbuckles.

[0019] As a preferred embodiment of this utility model, the cage is provided with a ladder that extends upward to the top surface of the channel steel beam.

[0020] The temporary safety passage for construction of a refuge layer between two core tubes provided by this utility model has the following advantages compared with the prior art:

[0021] A three-tiered structure—cantilevered steel beams, passageway steel beams, and a suspended cage—creates a three-dimensional working space. The cantilevered steel beams provide initial support, the passageway steel beams form a safe walking path and installation foundation, and the suspended cage below provides a vertical working surface covering the atrium area. The technical effect is to provide a modular, structurally stable, and fully functional specialized device. Under the protection of this device, the installation of all atrium steel beams can be completed efficiently, facilitating subsequent pouring of the refuge floor slab. This device is not only crucial for refuge floor construction but is also an independent product in itself, providing a safe solution for various high-altitude and unsupported area construction projects. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0023] Figure 1 A schematic diagram showing the layout of temporary safety passages installed between the core tubes;

[0024] Figure 2 Axonometric view of the temporary safety passage after installation;

[0025] Figure 3 A schematic diagram showing the arrangement of embedded parts in the floor slab, embedded parts in the first wall, embedded parts in the second wall, the first embedded steel plate, and the second embedded steel plate.

[0026] Figure 4 Detailed drawing of the connection node between the cantilever steel beam and the embedded parts of the floor slab;

[0027] Figure 5 The drawing shows the connection details of the cantilever steel beam, the embedded parts of the first wall and the diagonal tie rod. The drawing also shows the splicing structure of the channel steel beam and the connection structure between the cage and the channel steel beam.

[0028] Figure 6 This is a detailed drawing of the connection node between the steel beam of the passageway and the steel base on the floor slab.

[0029] Marked in the image:

[0030] Core tube 1; Opening 101; Floor slab 102; Wall 103; Cantilever steel beam 2; Passage steel beam 3; Cage 4; Guardrail 5; Upright 51; Wire rope 52; Floor slab embedded parts 6; First wall post-embedded parts 7; Diagonal tie rod 8; Second wall post-embedded parts 9; First embedded steel plate 10; Second embedded steel plate 11; Steel base 12; Clamping plate 13; Bolt 14. Detailed Implementation

[0031] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this utility model, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] See also Figures 1 to 6 A certain high-rise building has refuge floors on the 14th, 26th, 39th and 49th floors. Each refuge floor has two parallel reinforced concrete core tubes 1, forming an atrium area with a length and width span of approximately 23m*13m between them. During the construction of the refuge floor slab, steel beams for the atrium need to be erected in the air as the main load-bearing components of the entire refuge floor slab structure.

[0033] Therefore, a preferred embodiment of this utility model proposes a temporary safety passage for the construction of a refuge floor between two core tubes to facilitate the installation of the atrium steel beams. This temporary safety passage includes cantilevered steel beams 2, passage steel beams 3, and a cage 4. Multiple cantilevered steel beams 2 are respectively arranged at corresponding positions of the openings 101 of the two parallel core tubes 1. One end of each cantilevered steel beam 2 is fixed to a structure (such as a floor slab 102 and a wall 103) on one side of the core tube 1 by embedded steel parts, and the other end extends horizontally into the atrium area, forming a cantilever end. The cantilevered steel beams located on the same side... The cantilevered steel beams 2 are arranged at intervals along the front and back direction of the atrium; a set of passage steel beams 3 are installed on the cantilever ends of the cantilevered steel beams 2 on both sides. The passage steel beams 3 extend along the front and back direction of the atrium, and the front end of the passage steel beams 3 is erected on the floor slab 102 corresponding to the front side of the core tube 1, and the rear end is erected on the floor slab 102 corresponding to the rear side of the core tube 1; the top surface of the passage steel beams 3 is a safety passage, and a guardrail 5 is installed on its outer side; the cage 4 is hung on the inner side of the passage steel beams 3, and an operating platform for installation personnel is formed below the passage steel beams 3.

[0034] The temporary safety passage for construction of the refuge floor between two core tubes 1, as proposed in this embodiment of the invention, constructs a three-dimensional working space through a three-tiered structure consisting of cantilevered steel beams 2, passage steel beams 3, and a suspended cage 4. The cantilevered steel beams 2 provide initial support, the passage steel beams 3 form a safe walking path and installation foundation, and the suspended cage 4 below provides a vertical working surface covering the atrium area. Its technical advantage is that it provides a modular, structurally stable, and fully functional dedicated device. Under the protection of this device, the installation of all atrium steel beams can be completed efficiently, thus solving the fundamental technical problem of lack of working surface and extremely high safety risks encountered during the construction of the refuge floor slab 102 in the large-span, high-altitude cantilevered area (atrium) between two core tubes 1 in super high-rise buildings. Furthermore, this temporary safety passage is not only key to the construction of the refuge floor but is also an independent product in itself, providing a safety solution for various high-altitude, unsupported construction areas.

[0035] For example, to address the technical challenge of reliably anchoring the cantilevered steel beams 2 based on different site conditions (whether the inner side of the core tube 11 has a floor slab or only walls), steel embedded parts include floor slab embedded parts 6 and first wall-mounted embedded parts 7. For locations with a floor slab 102, pre-embedded floor slab embedded parts 6 are used; for locations with only walls 103 (such as the wall 103 where a fire elevator opening 101 has been installed), chemical bolts are used to re-embed the first wall-mounted embedded parts 7. Therefore, among the multiple cantilevered steel beams 2, some are I-beams welded to the floor slab embedded parts 6; others are C-beams welded to the first wall-mounted embedded parts 7. Thus, by employing a hybrid fixing scheme combining floor slab embedded parts 6 and first wall-mounted embedded parts 7, the flexibility and adaptability of installation are greatly enhanced, ensuring the cantilever structure obtains the most robust load-bearing foundation under various actual working conditions, thereby improving the general applicability and reliability of the entire temporary passageway system.

[0036] For example, the aforementioned temporary safety passage also includes a tie rod 8 and a second wall-mounted component 9. The second wall-mounted component 9 is embedded in the wall 103 where the fire elevator opening 101 has been installed, and is located above the first wall-mounted component 7. The upper end of the tie rod 8 is welded and fixed to the second wall-mounted component 9, and the lower end of the tie rod 8 is welded and fixed to the cantilevered steel beam 2. Thus, by adding a triangular stable structure composed of the tie rod 8 and the second wall-mounted component 9, part of the load at the cantilever end is transferred to the higher and more robust wall 103 through the tie rod 8, which greatly enhances the rigidity and load-bearing capacity of the cantilevered steel beam 2, reduces deformation and vibration, and provides an extremely stable and safe foundation for the upper passage. This is an important reinforcement of the temporary passage device in terms of structural safety, and effectively solves the technical problems of insufficient rigidity, easy sagging, and easy swaying of the long cantilevered steel beam 2.

[0037] For example, a first embedded steel plate 10 is embedded in the floor slab 102 corresponding to the front side of the core tube 1, and a second embedded steel plate 11 is embedded in the floor slab 102 corresponding to the rear side of the core tube 1. Steel bases 12 are welded onto the first embedded steel plate 10 and the second embedded steel plate 11, respectively. The top surface of the steel base 12 is at the same height as the top surface of the cantilever steel beam 2. The bottom of the front and rear ends of the channel steel beam 3 are respectively bolted to the top surface of the corresponding steel base 12. Thus, through the step-by-step design of "embedded steel plate - welded steel base - bolt connection", the strength and stability of the connection point are ensured, and the two ends of the channel steel beam 3 are firmly fixed. Secondly, by precisely controlling the elevation of the top surface of the steel base, the flatness of the top surface of the entire channel steel beam 3 is ensured, providing good conditions for safe walking and hanging of the cage 4. Furthermore, the bolt connection method facilitates disassembly and recycling in the later stage, reflecting the economic benefits of reusability.

[0038] For example, the passage steel beam 3 is bolted to the top surface of the cantilever steel beam 2 to facilitate the subsequent dismantling of the temporary safety passage.

[0039] For example, the passageway steel beam 3 is composed of two steel sections laid side by side, each steel section being made up of multiple H-beams spliced ​​together sequentially along the front-to-back direction of the atrium; adjacent H-beams are connected by clamps 13 and bolts 14. Thus, by adopting a design of "multiple H-beam splicing" and connecting them with "clamps 13 and bolts 14," the modularity of the device is achieved. The miniaturized components facilitate transportation and hoisting, while on-site splicing ensures the final formation of a complete long-span passageway. This design not only solves the problem of construction convenience but also allows this temporary passageway device to flexibly adapt to atrium areas of different spans.

[0040] For example, the guardrail 5 consists of uprights 51, wire ropes 52, and turnbuckles. The uprights 51, serving as the vertical support frame of the guardrail 5, are vertically fixed to the passageway steel beam 3 and are the main component bearing horizontal impact forces. The uprights 51 are typically made of short sections of angle steel, channel steel, or small steel pipes, with a connecting plate at their bottom. Bolt holes are drilled in the plate, and the connecting plate at the bottom of the upright 51 is securely fixed to the top surface or outer flange of the passageway steel beam 3 via bolts. The wire ropes 52, serving as the transverse cables of the guardrail 5, form multiple protective barriers between the uprights 51, typically at least two, to prevent people from falling. The turnbuckle itself is a central pull ring with left and right-hand threads. Rotating its body adjusts the distance between the two screws. It is connected in series to one end of the wire rope 52 (usually at the last upright 51), with one end connected to the end of the wire rope 52 and the other end connected to the fixing point of the upright 51. The turnbuckle is used to tension the wire rope 52, eliminating its slack and ensuring that the guardrail 5 is always taut and effective. Thus, the combination of upright 51, wire rope 52, and turnbuckle to replace the traditional heavy guardrail has the following technical effects: providing effective protection that meets safety requirements; greatly reducing the total weight of the temporary structure; the turnbuckle can easily tension the wire rope 52, ensuring that the protective system is always taut and effective; and all components can be quickly installed and disassembled, significantly improving the efficiency of safety facility erection.

[0041] For example, the cage 4 is equipped with a ladder (not shown in the figure), which extends upward to the top surface of the passage steel beam 3, improving the personnel flow path and forming a three-dimensional, continuous, and closed safe operation cycle system (from the core tube floor slab 102 → passage steel beam 3 → ladder → cage 4). This avoids the need for personnel to go up and down the cage 4 through other dangerous means, further improving the safety and humanization of the overall construction process.

[0042] The installation process for the temporary safety passage used in the construction of the refuge floor between the two core tubes is as follows:

[0043] First, the installation points for the cantilevered steel beams 2 are determined at locations such as the fire elevator opening 101 in the core tube 1. For locations with floor slabs 102, pre-embedded floor slab components 6 are used; for locations with only walls 103, chemical anchors are used to install the first wall-mounted component 7. One end of the cantilevered steel beam 2, made of I-beams, is securely welded to these embedded components. To ensure the stability of the cantilever structure, a second wall-mounted component 9 is installed above some of the cantilevered steel beams 2, and diagonal tie rods 8 are welded to form a triangular stable structure with the cantilevered steel beams 2.

[0044] It is understandable that the floor slab embedded part 6 is embedded simultaneously during the construction of the floor slab 102 structure inside the core tube 1; the installation of the first wall post-embedded part 7 and the second wall post-embedded part 9 is carried out after the concrete of the core tube 1 wall on the floor where they are located reaches the design strength and the formwork is removed, which is usually in the time window before the completion of the structural construction of the floor and the start of subsequent operations (such as the installation of cantilever steel beam 2).

[0045] Then, on the cantilevered ends of the cantilevered steel beams 2 on both sides, passageway steel beams 3 extending along the front-to-back direction of the atrium are installed. The passageway steel beams 3 consist of two parallel I-beams, which are connected to the cantilevered steel beams 2 by bolts. The front and rear ends of the passageway steel beams 3 are bolted to steel bases 12 pre-welded to the front and rear floor slabs 102 of the core tube 1. Before hoisting the passageway steel beams 3, guardrails 5 are installed on the outer side of their top surface.

[0046] It is understandable that the first embedded steel plate 10 and the second embedded steel plate 11 are both embedded simultaneously during the construction of the main structure floor slab 102, and the steel base 12 is welded to the corresponding first embedded steel plate 10 and second embedded steel plate 11 before the passage steel beam 3 is hoisted.

[0047] Finally, steel structure cages 4 are suspended inside the installed passageway steel beams 3. Multiple cages 4 are arranged near the nodes connecting each atrium steel beam to the core tube 1. The bottom of each cage 4 is covered with steel mesh, and protective netting is installed around it, forming a closed operating platform. Ladders are installed on the cages 4 for easy access for personnel.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A temporary safety passage for construction of a refuge layer between two core tubes, characterized in that, Located within the atrium area formed between the two adjacent core tubes, it includes: Multiple cantilever steel beams are arranged at the corresponding positions of the openings of the core tubes on both sides. One end of the cantilever steel beam is fixed to the structure on one side of the core tube by steel embedded parts, and the other end extends horizontally to the atrium area to form a cantilever end. The cantilever steel beams on the same side are arranged at intervals along the front and back direction of the atrium. The passageway steel beams are installed on the cantilever ends of the cantilever steel beams on both sides. The passageway steel beams extend along the front-to-back direction of the atrium, with the front end of the passageway steel beams resting on the floor slab corresponding to the front side of the core tube and the rear end resting on the floor slab corresponding to the rear side of the core tube. The top surface of the passageway steel beams is a safety passage, and guardrails are installed on its outer side. The cage is suspended inside the steel beam of the passageway, forming an operating platform below the steel beam for installation personnel to work on.

2. The temporary safety passage for construction of a refuge layer between dual core tubes according to claim 1, characterized in that, The steel embedded parts include floor slab embedded parts and first wall post-embedded parts. The floor slab embedded parts are embedded in the floor slab inside the core tube, and the first wall post-embedded parts are embedded in the wall where the fire elevator opening has been installed. Among the multiple cantilever steel beams, some cantilever steel beams are welded to the floor slab embedded parts, and other cantilever steel beams are welded to the first wall post-embedded parts.

3. The temporary safety passage for construction of the refuge layer between dual core tubes according to claim 2, characterized in that, It also includes a tie rod and a second wall-mounted component, the second wall-mounted component being embedded in the wall where the fire elevator opening has been installed, and located above the first wall-mounted component; the upper end of the tie rod is welded to the second wall-mounted component, and the lower end of the tie rod is welded to the cantilever steel beam.

4. The temporary safety passage for construction of a refuge layer between dual core tubes according to claim 1, characterized in that, A first embedded steel plate is embedded in the floor slab corresponding to the front side of the core tube, and a second embedded steel plate is embedded in the floor slab corresponding to the rear side of the core tube; steel bases are welded onto the first and second embedded steel plates respectively, and the top surface of the steel base is at the same height as the top surface of the cantilever steel beam. The bottom of the front and rear ends of the channel steel beam are respectively installed on the top surface of the corresponding steel base by bolts.

5. The temporary safety passage for construction of a refuge layer between dual core tubes according to claim 4, characterized in that, The channel steel beam is bolted to the top surface of the cantilever steel beam.

6. The temporary safety passage for construction of a refuge layer between dual core tubes according to claim 4, characterized in that, The channel steel beam is composed of two steel sections laid side by side.

7. The temporary safety passage for construction of a refuge layer between dual core tubes according to claim 6, characterized in that, Each of the aforementioned steel sections is composed of multiple I-beams spliced ​​together sequentially along the front-to-back direction of the atrium; adjacent I-beam sections are connected by clamps and bolts.

8. The temporary safety passage for construction of a refuge layer between dual core tubes according to claim 1, characterized in that, The guardrail consists of uprights, steel wire ropes, and turnbuckles.

9. The temporary safety passage for construction of a refuge layer between dual core tubes according to claim 1, characterized in that, The cage is equipped with a ladder that extends upwards to the top surface of the channel steel beam.

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