A super high-rise peripheral protection cyclic telescopic detachable cantilever structure and installation method

Abstract

Provided are a cyclically retractable and detachable cantilever structure and an installation method for super-high-rise exterior protection, which are used between the Nth floor and the N+1th floor of a super-high-rise building. The structure comprises a double-layer cantilever safety net, a fixing fixture, a steel wire rope, and an N-layer steel beam and an N+1-layer steel beam arranged on the outside of the Nth floor and the N+1th floor. The double-layer cantilever safety net is fixed by a circular tube to form a circular tube frame. Fixing fixtures are provided at the upper flange of the N-layer steel beam and the N+1-layer steel beam. Sliding sleeves are provided on the outer and inner sides of the circular tube frame. The fixing fixture and the sliding sleeve are connected by a second bolt fastener. The circular tube frames are connected by an adjustable circular tube sleeved on the circular tube. The adjustable circular tube is fixed to the circular tube frame by a first bolt fastener. The circular tube frame and the N+1-layer steel beam are tied together by a steel wire rope. Iron plates are provided at the corners and middle positions of the circular tube frame. Transverse U-shaped hooks are provided on the upper and lower surfaces of the iron plates. The fixing fixture consists of a transverse U-shaped clamp, a small round steel, and a connecting plate.

Description

Technical Field

[0001] The present invention relates to the technical field of building steel structure safety protection, and in particular to a super-high-rise peripheral protection cyclically retractable and detachable cantilever structure and an installation method thereof. Background Art

[0002] Currently, steel structures are becoming a new energy-saving and environmentally friendly building system in the construction industry, and super-high-rise steel structures are proliferating. Safety protection is a key priority during the construction of super-high-rise buildings, especially for protecting the exterior frame from falling objects. Conventional protective measures involve pre-installing embedded components in the floor slab, installing cantilevered I-beams, and placing safety nets on the I-beams. This method is time-consuming and costly to install, difficult to disassemble, and poses significant safety risks.

[0003] Therefore, it is necessary to study the cantilever structure of super high-rise exterior protection and the corresponding installation method to solve one or more of the above-mentioned technical problems. Summary of the Invention

[0004] In order to solve one or more technical problems in the prior art, the purpose of the present invention is to provide a cyclically retractable and detachable cantilever structure for the outer protection of super high-rise buildings, which is used between the Nth floor and the N+1th floor of a super high-rise building, and comprises a double-layer cantilever safety net (21), a fixing fixture (1), a steel wire rope (5), and an N-layer steel beam (6) and an N+1-layer steel beam (7) arranged on the outside of the Nth floor and the N+1th floor; the double-layer cantilever safety net (21) is fixed by a circular tube to form a circular tube frame (2), the fixing fixture (1) is provided at the upper flange of the N-layer steel beam (6), and the fixing fixture (1) is provided on the N+1-layer steel beam for pulling the steel wire rope (5).

[0005] Preferably, a sliding sleeve (3) is provided on both the outer side and the inner side of the circular tube frame (2), and the diameter of the sliding sleeve (3) is larger than the diameter of the circular tube of the circular tube frame (2), thereby ensuring that the sliding sleeve (3) can slide freely, and the fixing fixture (1) and the sliding sleeve (3) are connected by a second bolt fastener (15).

[0006] Preferably, the circular tube frames (2) are connected by an adjustable circular tube (4) sleeved on the circular tube, the adjustable circular tube (4) is fixed to the circular tube frame (2) by the first bolt fastener (8), and the circular tube frame (2) and the N+1 layer steel beam are tied by a steel wire rope (5).

[0007] Preferably, two groups of the adjustable circular tubes (4) are provided at corresponding positions, and each group of the adjustable circular tubes (4) is divided into a large adjustable circular tube and a small adjustable circular tube, the large adjustable circular tube is sleeved on the small adjustable circular tube, and the adjustable circular tubes (4) are fixed to the circular tube frame (2) by a first bolt fastener (8).

[0008] Preferably, the large adjustable circular tube and the small adjustable circular tube are both provided with long bolt holes, the long bolt holes on the large adjustable circular tube and the small adjustable circular tube correspond to each other, and the first bolt fastener (8) fixes the circular tube of the circular tube frame (2) and the adjustable circular tube (4) by passing through the long bolt holes.

[0009] Preferably, iron plates (9) are provided at the corners and the middle of the circular tube frame (2), and transverse U-shaped hooks (10) are provided on the upper and lower surfaces of the iron plates (9) for hanging a double-layer cantilevered safety net (21).

[0010] Preferably, the fixing fixture (1) is composed of a transverse U-shaped card plate (11), a small round steel (12) and a connecting plate (13); the transverse U-shaped card plate (11) is tightly connected to the N-layer steel beam (6) and the N+1-layer steel beam using tightening bolts (14) to ensure that they do not slide.

[0011] Preferably, one end of the steel wire rope (5) is connected to the sliding sleeve (3) outside the circular tube frame (2), and the other end is connected to the fixing fixture (1) on the N+1 layer steel beam (7), wherein when connected to the sliding sleeve (3), a third bolt fastener (31) is used to fix it.

[0012] The present invention also aims to provide a method for installing a super high-rise peripheral protection cyclically retractable and detachable cantilever structure, comprising the following steps:

[0013] Step 1, installing the circular tube frame (2): assembling the circular tubes on the ground into a rectangular frame structure according to corresponding dimensions, setting adjustable circular tubes (4) on both sides of the frame, the diameter of the adjustable circular tubes (4) being larger than the diameter of the circular tube frame, and long bolt holes being set on the circular tubes;

[0014] Step 2, installing the iron plate (9) and the transverse U-shaped hook (10): the iron plate (9) and the transverse U-shaped hook (10) are arranged at the corners and the middle position of the circular tube frame (2), and are connected to the circular tube by welding, and the transverse U-shaped hook is welded to the upper and lower surfaces of the iron plate (9);

[0015] Step 3, installing the sliding sleeve (3): before assembling the circular tube frame (2), pre-install the sliding sleeve (3) on the circular tube. The sliding sleeve (3) is provided on both sides of the circular tube. The diameter of the sliding sleeve (3) is larger than the diameter of the circular tube to ensure that the sliding sleeve can slide freely along the circular tube and the sleeve can rotate freely.

[0016] Step 4, installing the fixing fixture (1): installing the fixing fixture (1) on the upper flanges of the N-layer steel beam (6) and the N+1-layer steel beam (7), respectively, and the transverse U-shaped clamp (11) of the fixing fixture (1) is tightly connected to the N-layer steel beam (6) and the N+1-layer steel beam using tightening bolts (14) to ensure that they do not slide;

[0017] Step 5, hanging a double-layer cantilevered safety net (21), wherein the double-layer cantilevered safety net (21) is hung on the transverse U-shaped hooks (10) on the upper and lower surfaces of the pre-installed iron plate (9);

[0018] Step 6, installing the cantilever structure: after the entire cantilever structure is adjusted in size according to the outer contour line through the adjustable circular tube (4), it is hoisted by a tower crane. After it is in place, a steel wire rope (5) is stretched on the sliding sleeve (3) outside the circular tube frame (2). One end of the steel wire rope (5) is connected to the sliding sleeve (3) outside the circular tube frame (2), and the other end is connected to the fixing fixture (1) on the N+1 layer steel beam (7). When connected to the sliding sleeve (3), a third bolt fastener (31) is used to fix it.

[0019] Preferably, the mesh size of the safety net on the upper surface of the iron plate (9) in step 5 is not greater than 15 mm, and the mesh size of the safety net on the lower surface is not greater than 30 mm.

[0020] Compared with the prior art, the present invention has one or more of the following technical effects:

[0021] The structure is simple in design, easy to make, has good use effect, easy to obtain materials, and high installation efficiency. It solves the problem of complete protection of the periphery of high-rise and super-high-rise buildings, and plays a good protective role in preventing falls from heights. Moreover, the entire structure can be reused, saving costs, reducing losses, and has good economic and environmental protection characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to understand the details of the above features of the present invention, reference may be made to the embodiments for a more detailed description of the invention briefly summarized above. The accompanying drawings relate to preferred embodiments of the present invention and are described below:

[0023] Figure 1 Schematic diagram of a telescopic and detachable cantilever structure according to a preferred embodiment of the present invention (excluding the safety net).

[0024] Figure 2 Schematic diagram of a telescopic and detachable cantilever structure (including a safety net) according to a preferred embodiment of the present invention.

[0025] Figure 3 It is a top view of a telescopic and detachable cantilever structure according to a preferred embodiment of the present invention.

[0026] Figure 4 2 is a side schematic diagram of a fixing fixture according to a preferred embodiment of the present invention.

[0027] Figure 5 Schematic diagram of the measurement of the circular tube frame and the sliding sleeve according to a preferred embodiment of the present invention.

[0028] Figure 6 Schematic diagram of the connection between the circular tube frame, the iron plate and the horizontal U-shaped hook according to a preferred embodiment of the present invention.

[0029] Figure 7 Schematic diagram of a circular tube frame and an adjustable circular tube structure according to a preferred embodiment of the present invention.

[0030] Among them: 1. Fixing fixture; 2. Round tube frame; 3. Sliding sleeve; 4. Adjustable round tube; 5. Steel wire rope; 6. N-layer steel beam; 7. N+1-layer steel beam; 8. First bolt fastener; 9. Iron plate; 10. Horizontal U-shaped hook; 11. Horizontal U-shaped clip; 12. Small round tube; 13. Connecting plate; 14. Tightening bolt; 15. Second bolt fastener; 21. Double-layer cantilever safety net; 31. Third bolt fastener. Specific embodiments

[0031] Various embodiments will now be described in detail, with one or more examples of these embodiments being illustrated in the figures. Each example is provided by way of explanation and is not meant to be limiting. For example, features illustrated or described as part of one embodiment can be used or combined with any other embodiment to produce yet another embodiment. The present invention is intended to encompass such modifications and variations.

[0032] In the following description of the drawings, the same reference numerals indicate the same or similar components. Generally, only the differences between individual embodiments will be described. Unless otherwise explicitly stated, the description of a part or aspect in one embodiment can also apply to the corresponding part or aspect in another embodiment.

[0033] like Figures 1 to 7As shown in the figure, this embodiment of a cyclically retractable and detachable cantilever structure for protecting the perimeter of a super-high-rise building from falling objects comprises a double-layer safety net 21, a fixing fixture 1, steel wire ropes 5, and steel beams 6 and 7 on the Nth and N+1th layers, respectively, on the outside of the Nth and N+1 layers. The double-layer cantilever safety net 21 is fixed by a circular tube to form a circular tube frame 2 structure, and the circular tube adopts a diameter of Φ48x3.0; iron plates 9 are set at the corners and middle positions of the circular tube frame 2, and the iron plates and the frame are in the form of corner welds; horizontal U-shaped hooks 10 are set on the upper and lower surfaces of the iron plate 9 for hanging the double-layer safety net 21; the frames are connected by adjustable circular tubes 4 set on the circular tubes, and the diameter of the adjustable circular tubes 4 is 10mm larger than the diameter of the circular tube frame 2 to ensure free adjustment; bolt holes are set on the adjustable circular tubes 4 and the overlapping circular tube frames 2, and the bolt hole spacing is 100mm. When the circular tube frame 2 needs to be adjusted in size, it can be stretched and retracted by changing the position of the bolt holes, and the adjustable circular tube 4 and the frame circular tube 2 are fixed by the first bolt fastener 8; a sliding sleeve 3 is set on the outside of the circular tube frame 2, and the sliding sleeve 3 has a diameter larger than the circular tube frame 2 The diameter of the round tube is 15mm larger to ensure that the sleeve can slide freely; the sliding sleeve 3 and the outer steel beam of the floor (N+1 floor) 7 are tied with a steel wire rope 5; a sliding sleeve 3 is also provided on the inner side of the round tube frame 2; a fixing clamp 1 is provided at the upper flange of the outer steel beam of the floor (N floor) 6, and is connected to the sliding sleeve 3 with a second bolt fastener 15; a fixing clamp 1 is also provided at the upper flange of the outer steel beam of the floor (N+1 floor) 7 for tying the steel wire rope 5; the fixing clamp consists of a transverse U-shaped clamp 11, a small round tube 12 and a connecting plate 13; the transverse U-shaped clamp 11 and the floor steel beam are tightened with a tightening bolt 14 to ensure that they do not slide; one end of the steel wire rope is connected to the sliding sleeve 3 on the outside of the round tube frame 2, and the other end is connected to the fixing clamp 1 on the outer steel beam of the floor (N+1 floor) 7, and when connected to the sliding sleeve 3, it is fixed with a third bolt fastener 31.

[0034] The method for installing a cyclically retractable and detachable cantilever structure for super high-rise exterior protection in this embodiment includes the following steps:

[0035] Step 1, installation of the circular tube frame 2. The circular tubes are assembled into a rectangular frame structure on the ground according to the corresponding size. Adjustable circular tubes 4 are set on both sides of the frame. The diameter of the adjustable circular tubes 4 is 10mm larger than the diameter of the frame circular tubes 2, and bolt holes are set on the circular tubes.

[0036] Step 2, installation of the iron plate 9 and the transverse U-shaped hook 10. The iron plate 9 and the transverse U-shaped hook 10 are set at the corners and the middle position of the circular tube frame 2, and are connected to the circular tube by welding. The transverse U-shaped hook 10 is welded to the upper and lower surfaces of the iron plate 9.

[0037] Step 3, installation of the sliding sleeve 3. Before assembling the circular tube frame 2, the sliding sleeve 3 is pre-installed on the circular tube. Sliding sleeves 3 need to be set on both sides of the circular tube. The diameter of the sliding sleeve is 15mm larger than the diameter of the circular tube to ensure that the sliding sleeve can slide freely along the circular tube and the sleeve can rotate freely.

[0038] Step 4, installation of the fixing fixture 1. The fixing fixture 1 should be installed on the upper flanges of the N-layer steel beam and the N+1-layer steel beam respectively. The transverse U-shaped clamp 11 of the fixing fixture 1 is tightened to the upper flange of the steel beam by bolt fasteners to ensure that it does not loosen.

[0039] Step 5, hanging of the double-layer safety net 21. The safety nets are respectively hung on the horizontal U-shaped hooks 10 on the upper and lower surfaces of the pre-installed iron plate 9. The mesh size of the upper surface safety net shall not be greater than 15mm, and the mesh size of the lower surface safety net shall not be greater than 30mm.

[0040] Step 6, installation of the cantilever structure. After the size of the entire cantilever structure is adjusted according to the outer contour line through the adjustable round tube 4, it is hoisted by a tower crane. After it is in place, a steel wire rope 5 is pulled on the sliding sleeve 3 outside the round tube frame, and the other end of the steel wire rope 5 is connected to the upper steel beam fixing fixture through bolt fasteners.

[0041] In this embodiment, all materials are generally Q235B, and the bolts are 8.8-grade high-strength bolts. In steps 1-6, all components are manufactured to tolerances that meet the requirements of GB50205, "Code for Acceptance of Steel Structure Construction Quality," and are pre-assembled in the factory. Safety protection measures must comply with 17G911, "Safety Protection for Steel Structure Construction." In steps 4 and 6, the diameter of the 8.8-grade high-strength bolts must be no less than M20, and their material and requirements comply with the current national standard JGJ82-2011, "Technical Specification for High-Strength Bolt Connections for Steel Structures."

[0042] This embodiment is actually applied to a super high-rise structure building of a certain project in Guangdong Province. The building height is 388m, with 70 floors above the ground. The project is located in a busy section of the city center. During the construction process, in order to prevent objects from falling from high altitudes, safety nets need to be set up around the periphery of the floors every 5 floors or so. In the early stage, embedded iron parts are used to set up cantilevered I-beams, and then the safety nets are laid. It costs a lot of manpower, takes a long time to complete, and the edge operations are extremely dangerous. However, the detachable cantilever structure of this embodiment has a simple structural design, is easy to make, has good use effect, is easy to obtain materials, and has high installation efficiency. It solves the problem of complete protection of the periphery of high-rise and super high-rise buildings, and plays a good protective role in preventing falling objects from heights. Moreover, the entire structure can be reused, which saves costs, reduces losses, and has good economic and environmental protection characteristics.

[0043] While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope of the invention, which is defined by the following claims.

[0044] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention. Technical features in these embodiments that do not conflict with each other may be combined. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A cyclically retractable and detachable cantilever structure for the outer protection of a super high-rise building, used between the Nth floor and the N+1th floor of a super high-rise building, characterized in that: include: N-layer steel beams are set on the outside of the N-layer floor; N+1 layer steel beams are set on the outside of the N+1 layer; The round tube frame is formed by fixing round tubes; The fixing fixture is composed of a transverse U-shaped clamp, a small round tube and a connecting plate. The fixing fixture is respectively set at the upper flanges of both ends of the steel beams of the N and N+1 layers. The transverse U-shaped clamp is connected to the steel beams of the N and N+1 layers with tightening bolts; Sliding sleeves are arranged on the outside and inside of the circular tube frame, the diameter of the sliding sleeves is larger than the diameter of the circular tube of the circular tube frame, and the sliding sleeves arranged on the inside of the circular tube frame are connected to the connecting plate of the fixing fixture arranged on the N-layer steel beam by a second bolt fastener; One end of the steel wire rope is connected to the sliding sleeve on the outside of the circular tube frame, and the other end is connected to the connecting plate of the fixing fixture on the N+1 layer steel beam outside the floor; the circular tube frame and the N+1 layer steel beam are tied together by the steel wire rope, and when the steel wire rope is connected to the sliding sleeve on the outside of the circular tube frame, it is fixed with a third bolt fastener.

2. The cyclically retractable and detachable cantilever structure for super high-rise perimeter protection according to claim 1 is characterized in that: The circular tube frames are connected by an adjustable circular tube sleeved on the circular tube. The diameter of the adjustable circular tube is larger than that of the circular tube frame. The adjustable circular tube is fixed to the circular tube frame by a first bolt fastener.

3. The cyclically retractable and detachable cantilever structure for super high-rise exterior protection according to claim 2 is characterized in that: The adjustable round tubes are arranged in two groups at corresponding positions. Each group of adjustable round tubes is divided into a large adjustable round tube and a small adjustable round tube. The large adjustable round tube is sleeved on the small adjustable round tube.

4. The cyclically retractable and detachable cantilever structure for super high-rise perimeter protection according to claim 3 is characterized in that: The large adjustable round tube and the small adjustable round tube are both provided with long bolt holes, which correspond to each other, and the first bolt fastener fixes the round tube of the round tube frame to the adjustable round tube by passing through the long bolt holes.

5. The cyclically retractable and detachable cantilever structure for super high-rise perimeter protection according to claim 4 is characterized in that: Also includes: The double-layer cantilever safety net is hung on the circular tube frame; iron plates are set at the corners and middle positions of the circular tube frame, and horizontal U-shaped hooks are set on the upper and lower surfaces of the iron plates for hanging the double-layer cantilever safety net.

6. The cyclically retractable and detachable cantilever structure for super high-rise exterior protection according to claim 5 is characterized in that: The adjustable circular tube and the overlapping circular tube frame are both provided with bolt holes spaced at equal intervals.

7. A method for installing a cyclically retractable and detachable cantilever structure for super high-rise exterior protection according to claim 6, characterized in that The steps include: Step 1: Install the circular tube frame: Assemble the circular tubes on the ground into a rectangular frame structure according to the corresponding size. Adjustable circular tubes are set on both sides of the frame. The diameter of the adjustable circular tubes is larger than the diameter of the circular tube frame, and long bolt holes are set on the circular tubes. Step 2: Install the iron plate and the horizontal U-shaped hook: Place the iron plate and the horizontal U-shaped hook at the corners and the middle of the round tube frame, connect them to the round tube by welding, and weld the horizontal U-shaped hook to the upper and lower surfaces of the iron plate; Step 3, install the sliding sleeve: before assembling the circular tube frame, pre-install the sliding sleeve on the circular tube. Sliding sleeves are set on both sides of the circular tube. The diameter of the sliding sleeve is larger than the diameter of the circular tube to ensure that the sliding sleeve can slide freely along the circular tube and the sleeve can rotate freely. Step 4: Install the fixing fixtures: Install the fixing fixtures on the upper flanges of the N-layer steel beam and the N+1-layer steel beam respectively. Use tightening bolts to tighten the transverse U-shaped clamps of the fixing fixtures to the N-layer steel beam and the N+1-layer steel beam to ensure that they do not slide. Step 5: Hang the double-layer cantilever safety net, which is hung on the horizontal U-shaped hooks on the upper and lower surfaces of the pre-installed iron plate; Step 6, install the cantilever structure: After the size of the entire cantilever structure is adjusted according to the outer contour line through the adjustable round tube, it is hoisted by a tower crane. After it is in place, a steel wire rope is stretched on the sliding sleeve on the outside of the round tube frame. One end of the steel wire rope is connected to the sliding sleeve on the outside of the round tube frame, and the other end is connected to the fixing clamp on the N+1 layer steel beam. When connected to the sliding sleeve, a third bolt fastener is used to fix it.

8. An installation method according to claim 7, characterized in that: In step 5, the mesh size of the safety net on the upper surface of the iron plate is no more than 15 mm, and the mesh size of the safety net on the lower surface is no more than 30 mm.

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