A cyclic telescopic detachable cantilever structure and installation method

Abstract

The application provides a cyclic telescopic detachable cantilever structure and a mounting method, which is used for super high-rise peripheral protection and comprises N-layer steel beams, N+1-layer steel beams, a circular tube frame, fixing clamps and steel wires; the N-layer steel beams are arranged outside the Nth floor; the N+1-layer steel beams are arranged outside the N+1th floor; the circular tube frame is formed by fixing circular tubes, and sliding sleeves are arranged outside and inside the circular tube frame and can slide and rotate freely along the circular tubes; the fixing clamps are arranged on the flanges at the two ends of the N-layer and N+1-layer steel beams respectively; one end of the steel wire is connected with the sliding sleeve outside the circular tube frame, and the other end of the steel wire is connected with the fixing clamp on the N+1-layer steel beam outside the floor; the sliding sleeve outside the circular tube frame is pulled together with the N+1-layer steel beam by the steel wire, so that the problem of high-rise and super high-rise peripheral protection is solved, the high falling is well prevented, and the whole structure can be repeatedly used.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 202110213296.5, entitled "A retractable and detachable cantilever structure for perimeter protection of ultra-high-rise buildings and its installation method", filed on February 25, 2021, the contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of building steel structure safety protection technology, and in particular to a cyclic telescopic detachable cantilever structure and its installation method. Background Technology

[0003] Currently, in the field of construction engineering, steel structure buildings are considered a new type of energy-saving and environmentally friendly building system, with super high-rise steel structure buildings emerging in large numbers. Safety is paramount during the construction of super high-rise buildings, especially the protection of the outer frame from falling objects. Conventional protective measures include... Embedded parts are pre-installed at the floor slab location, and cantilevered I-beams are installed. Safety netting erected on I-beams This method is time-consuming, costly, and difficult to disassemble, posing a significant safety hazard.

[0004] Therefore, it is necessary to study the cantilever structure of the outer protection of super high-rise buildings and the corresponding installation methods to solve one or more of the above-mentioned technical problems. Summary of the Invention

[0005] To address one or more technical problems in the prior art, in a first aspect, the present invention provides a retractable and detachable cantilever structure for perimeter protection of ultra-high-rise buildings, comprising: N-layer steel beams are installed on the outside of the Nth floor. The N+1 layer steel beam is located on the outside of the N+1 floor. A circular tube frame is formed by fixing a circular tube. Sliding sleeves are provided on the outer and inner sides of the circular tube frame. The sliding sleeves can slide and rotate freely along the circular tube. Fixed clamps are respectively installed at the upper flanges of both ends of the steel beams in layers N and N+1; 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 fixing clamp on the N+1 floor steel beam on the outside of the floor. The sliding sleeve on the outside of the circular tube frame and the N+1 floor steel beam are connected by steel wire rope.

[0006] Preferably, 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 the diameter of the circular tube frame. The adjustable circular tube is fixed to the circular tube frame using a first bolt fastener.

[0007] Preferably, the diameter of the sliding sleeve is larger than the diameter of the circular tube frame, and the fixing clamp set on the N-layer steel beam is connected to the sliding sleeve inside the circular tube frame by a second bolt fastener.

[0008] Preferably, when the wire rope is connected to the sliding sleeve on the outside of the circular tube frame, a third bolt fastener is used for fixing.

[0009] Preferably, the fixing clamp consists of a transverse U-shaped clamping plate, a small round tube, and a connecting plate; The transverse U-shaped clamping plate is tightly connected to the N and N+1 layer steel beams using tightening bolts; The other end of the wire rope is connected to the connecting plate of the fixing clamp on the N+1 floor steel beam on the outside of the building; The sliding sleeve set inside the circular tube frame is connected to the connecting plate of the fixed clamp set on the Nth layer steel beam by a second bolt fastener.

[0010] Preferably, two sets of adjustable round tubes are provided at corresponding positions. Each set of adjustable round tubes consists of a large adjustable round tube and a small adjustable round tube, with the large adjustable round tube fitted onto the small adjustable round tube.

[0011] Preferably, both the large and small adjustable round tubes are provided with long bolt holes, and the long bolt holes on the large and small adjustable round tubes correspond to each other. 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.

[0012] Preferably, the retractable and detachable cantilever structure further includes: A double-layer cantilever safety net is hung on a circular tube frame. Iron plates are installed at the corners and middle of the circular tube frame, and horizontal U-shaped hooks are installed on the upper and lower surfaces of the iron plates for hanging the double-layer cantilever safety net.

[0013] Preferred, The adjustable circular tube and the overlapping circular tube frame are both equipped with equally spaced bolt holes. .

[0014] Preferably, the retractable and detachable cantilever structure is used between the Nth floor and the N+1th floor of a super high-rise building.

[0015] The purpose of this invention is to provide an installation method for a cyclic telescopic detachable cantilever structure as described in the first aspect, comprising the following steps: Step 1, Install the round tube frame: Assemble the round tubes on the ground according to the corresponding dimensions to form a rectangular frame structure. Adjustable round tubes are set on both sides of the frame. The diameter of the adjustable round tubes is larger than the diameter of the round tube frame, and long bolt holes are set on the round tubes. Step 2, Install the iron plate and horizontal U-shaped hooks: Set the iron plate and horizontal U-shaped hooks at the corners and middle of the round tube frame and weld them to the round tube. The horizontal U-shaped hooks are welded to the upper and lower surfaces of the iron plate. Step 3, Install sliding sleeves: Before assembling the round tube frame, pre-fit the sliding sleeves onto the round tubes. Sliding sleeves are installed on both sides of the round tubes. The diameter of the sliding sleeve is larger than the diameter of the round tube to ensure that the sliding sleeve can slide freely along the round tube and can rotate freely at the same time. Step 4, Install the fixing clamps: Install the fixing clamps on the upper flanges of the N-layer steel beam and the N+1-layer steel beam respectively. The transverse U-shaped clamps of the fixing clamps are tightened to the N-layer steel beam and the N+1-layer steel beam with tightening bolts to ensure that they do not slip. Step 5: Install double-layer cantilever safety nets. The double-layer cantilever safety nets are respectively 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 entire cantilever structure is adjusted to the correct size according to the outer contour line using an adjustable circular tube, it is hoisted using a tower crane. Once in place, a steel wire rope is pulled onto the sliding sleeve on the outside of the circular tube frame. 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 fixing clamp on the N+1 layer steel beam. When connecting to the sliding sleeve, a third bolt fastener is used for fixation.

[0016] Preferably, in step 5, the mesh size of the safety net on the upper surface of the iron plate is no greater than 15mm, and the mesh size of the safety net on the lower surface is no greater than 30mm.

[0017] Compared with the prior art, the present invention has one or more of the following technical effects: The structure is simple in design, easy to manufacture, has good performance, is readily available in materials, and has high installation efficiency. This effectively solves the problem of complete perimeter protection for high-rise and super high-rise buildings, providing excellent protection against falls from heights. The entire structure is repeatable Reusable and interchangeable, it saves costs and reduces wear and tear, exhibiting excellent economic and environmental characteristics. . Attached Figure Description

[0018] To understand the details of the above-described features of the present invention, a more detailed description of the invention, briefly summarized above, can be obtained by referring to the embodiments. The accompanying drawings relate to preferred embodiments of the invention and are described below: Figure 1 This is a schematic diagram of a telescopic and detachable cantilever structure according to a preferred embodiment of the present invention (excluding safety net).

[0019] Figure 2 This is a schematic diagram of a telescopic and detachable cantilever structure (including a safety net) according to a preferred embodiment of the present invention.

[0020] Figure 3 This is a top view of a telescopic and detachable cantilever structure according to a preferred embodiment of the present invention.

[0021] Figure 4 This is a side view of the fixing clamp according to a preferred embodiment of the present invention.

[0022] Figure 5This is a schematic diagram of the measurement of the circular tube frame and sliding sleeve according to a preferred embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram showing 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.

[0024] Figure 7 This is a schematic diagram of a circular tube frame and an adjustable circular tube structure according to a preferred embodiment of the present invention.

[0025] The components include: 1. Fixing clamp; 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 clamping plate; 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 Implementation

[0026] Various embodiments will now be described in detail, one or more examples of which are illustrated in the figures. The examples are provided for illustrative purposes and are not intended to be limiting. For example, features illustrated or described as part of one embodiment can be used in or combined with any other embodiment to produce yet another embodiment. The invention is intended to include such modifications and variations.

[0027] In the following description of the accompanying drawings, the same reference numerals indicate the same or similar parts. Generally, only the differences between individual embodiments will be described. Unless otherwise expressly indicated, the description of parts or aspects of one embodiment can also be applied to corresponding parts or aspects of another embodiment.

[0028] like Figures 1 to 7 As shown in the figure, this embodiment is a retractable and detachable cantilever structure for the perimeter protection of super high-rise buildings, used for safety protection against falling objects from heights. It includes a double-layer safety net 21, a fixing clamp 1, a steel wire rope 5, N layers, and N+1. The outermost layer consists of N-layer steel beams 6 and N+1-layer steel beams 7. The double-layer cantilevered safety net 21 is fixed by circular tubes to form a circular tube frame 2 structure. The diameter is Φ48x3.0; iron plates 9 are installed at the corners and middle of the round tube frame 2, and the iron plates are welded to the frame. Both the upper and lower surfaces of the iron plate 9 are equipped with horizontal U-shaped hooks 10 for hanging double-layer safety nets 21; the frames are connected by round tubes. The adjustable round tube 4 is connected, and its diameter is 10mm larger than that of the round tube frame 2 to ensure free adjustment; adjustable Bolt holes are provided on both the section of circular tube 4 and the overlapping circular tube frame 2, with a bolt hole spacing of 100mm. When the circular tube frame 2 needs to be sized... During dimensional adjustment, the adjustable tube 4 can be extended or retracted by changing the position of the bolt holes. The first bolt fastener 8 is used to fasten the adjustable round tube 4 and... The frame tube 2 is fixed; a sliding sleeve 3 is installed on the outside of the frame tube 2, and the diameter of the sliding sleeve 3 is larger than the diameter of the round tube of the frame tube 2. The sleeve is 15mm larger to ensure that it can slide freely; the sliding sleeve 3 is connected to the outer steel beam (N+1 floor) 7 by steel wire rope 5; A sliding sleeve 3 is also provided on the inner side of the circular tube frame 2; a fixing clamp 1 is provided on the upper flange of the outer steel beam (Nth floor) 6, which is connected to the sliding sleeve. Sleeve 3 is connected using the second bolt fastener 15; a fixing clamp 1 is also installed at the upper flange of the outer steel beam (N+1 floor) 7, using... For tying steel wire rope 5; the fixing clamp consists of a transverse U-shaped clamping plate 11, a small round tube 12 and a connecting plate 13; the transverse U-shaped clamping plate 11 and The floor steel beams are connected by 14 tightening bolts to ensure they do not slip; one end of the steel wire rope is connected to the sliding sleeve on the outside of the circular tube frame 2. Pipe 3, the other end is connected to the fixing clamp 1 on the outer steel beam (N+1 floor) 7 of the floor, wherein when connected to the sliding sleeve 3, the first... Three-bolt fastener 31 for fixing .

[0029] The installation method of the retractable and detachable cantilever structure for the outer protection of ultra-high-rise buildings in this embodiment includes the following steps: Step 1, installation of the circular tube frame 2: The circular tubes are assembled on the ground into a rectangular frame structure according to the corresponding dimensions. 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 circular tubes 2 of the frame, and bolt holes are set on the circular tubes.

[0030] Step 2, installation of iron plate 9 and horizontal U-shaped hook 10. Iron plate 9 and horizontal U-shaped hook 10 are set at the corners and middle of the round tube frame 2 and are welded to the round tube. The horizontal U-shaped hook 10 is welded to the upper and lower surfaces of iron plate 9.

[0031] Step 3, installation of sliding sleeve 3. Before assembling the round tube frame 2, the sliding sleeve 3 is pre-installed on the round tube. Sliding sleeves 3 need to be installed on both sides of the round tube. The diameter of the sliding sleeve is 15mm larger than the diameter of the round tube to ensure that the sliding sleeve can slide freely along the round tube and rotate freely.

[0032] Step 4, installation of fixing clamp 1. Fixing clamp 1 should be installed on the upper flange of the N-layer steel beam and the N+1-layer steel beam respectively. The transverse U-shaped clamp 11 of fixing clamp 1 is tightened to the upper flange of the steel beam by bolt fasteners to ensure that it does not loosen.

[0033] Step 5: Install the double-layer safety net 21. The safety net is installed 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 safety net on the upper surface shall not exceed 15mm, and the mesh size of the safety net on the lower surface shall not exceed 30mm.

[0034] Step 6, installation of the cantilever structure: After the dimensions of the entire cantilever structure are adjusted 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 pulled on the sliding sleeve 3 on the outside of the circular tube frame. The other end of the steel wire rope 5 is connected to the upper steel beam fixing clamp through bolt fasteners.

[0035] In this embodiment, all materials are generally made of Q235B steel, and the bolts are 8.8 grade high-strength bolts. In steps 1-6, the manufacturing precision deviation of all components meets the requirements of GB50205 "Code for Acceptance of Construction Quality of Steel Structures" and is pre-assembled in the factory. Simultaneously, the safety protection methods must comply with 17G911 "Safety Protection in Steel Structure Construction". In steps 4 and 6, the diameter of the 8.8 grade high-strength bolts must not be less than M20, and their material and requirements comply with the provisions of the current national standard JGJ82-2011 "Technical Specification for High-Strength Bolt Connections in Steel Structures".

[0036] This embodiment was actually applied to a super high-rise building in a project in Guangdong Province. The building is 388m high and has a base height of 70m. The project is located in a busy downtown area. During construction, to prevent falling objects from heights, scaffolding needs to be erected around the perimeter of each floor approximately every five floors. The safety netting installation involves pre-embedded iron components, erecting cantilevered I-beams, and then laying the safety netting. This method is labor-intensive and time-consuming. The work is long and extremely dangerous, especially when operating near the edge.However, the detachable cantilever structure of this embodiment is simple in design, easy to manufacture, effective in use, readily available in materials, and highly efficient in installation. It effectively solves the problem of complete perimeter protection for high-rise and super high-rise buildings, providing excellent protection against falls. Furthermore, the entire structure is reusable, saving costs and reducing wear and tear, exhibiting excellent economic and environmental characteristics. While the foregoing describes embodiments of the present invention, other and further embodiments of the present invention may be devised without departing from the basic scope of the present invention, the scope of which is defined by the following claims.

[0037] 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 contradict each other can be combined with each other. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A retractable and detachable cantilever structure for perimeter protection of ultra-high-rise buildings, characterized in that, include: N-layer steel beams are installed on the outside of the Nth floor; N+1-layer steel beams are installed on the outside of the N+1th floor. A circular tube frame is formed by fixing circular tubes. Sliding sleeves are provided on the outer and inner sides of the circular tube frame, and the sliding sleeves can slide and rotate freely along the circular tubes. Fixed clamps are set in pairs at the upper flanges of both ends of the steel beams on the N and N+1 floors respectively. A steel wire rope is connected at one end to the sliding sleeve on the outer side of the circular tube frame and at the other end to the fixed clamp on the steel beam on the N+1 floor. The fixed clamp on the steel beam on the N+1 floor is used to tie the steel wire rope. The sliding sleeve on the outer side of the circular tube frame is tied to the steel beam on the N+1 floor by the steel wire rope. The circular tube frames are connected by adjustable circular tubes fitted on the circular tubes. The diameter of the adjustable circular tubes is larger than the diameter of the circular tube frames. The adjustable circular tubes are fixed to the circular tube frames using the first bolt fastener.

2. The cyclic telescopic detachable cantilever structure as described in claim 1, characterized in that, The diameter of the sliding sleeve is larger than the diameter of the circular tube frame. The fixing clamp set on the N-layer steel beam is connected to the sliding sleeve inside the circular tube frame by a second bolt fastener.

3. The cyclic telescopic detachable cantilever structure as described in claim 1, characterized in that, Two sets of adjustable round tubes are set at corresponding positions. Each set of adjustable round tubes consists of a large adjustable round tube and a small adjustable round tube, with the large adjustable round tube fitted onto the small adjustable round tube.

4. The cyclic telescopic detachable cantilever structure as described in claim 3, characterized in that, Both the large and small adjustable round tubes are provided with long bolt holes, and the long bolt holes on the large and small adjustable round tubes correspond to each other. The first bolt fastener fixes the round tube of the round tube frame to the adjustable round tube by passing through the long bolt hole.

5. The cyclic telescopic detachable cantilever structure as described in claim 1, characterized in that, Also includes: A double-layer cantilever safety net is hung on a circular tube frame. Iron plates are installed at the corners and middle of the circular tube frame, and horizontal U-shaped hooks are installed on the upper and lower surfaces of the iron plates for hanging the double-layer cantilever safety net.

6. The cyclic telescopic detachable cantilever structure as described in claim 5, characterized in that, The adjustable circular tube and the overlapping circular tube frame are both provided with bolt holes at equal intervals.

7. The cyclic telescopic detachable cantilever structure as described in claim 6, characterized in that, Used between the Nth floor and the N+1th floor of a super high-rise building.

8. An installation method for a cyclic telescopic detachable cantilever structure as described in any one of claims 5-7, characterized in that... Includes the following steps: Step 1, Install the round tube frame: Assemble the round tubes on the ground according to the corresponding dimensions to form a rectangular frame structure. Adjustable round tubes are set on both sides of the frame. The diameter of the adjustable round tubes is larger than the diameter of the round tube frame, and long bolt holes are set on the round tubes. Step 2, Install the iron plate and horizontal U-shaped hooks: Set the iron plate and horizontal U-shaped hooks at the corners and middle of the round tube frame and weld them to the round tube. The horizontal U-shaped hooks are welded to the upper and lower surfaces of the iron plate. Step 3, Install sliding sleeves: Before assembling the round tube frame, pre-fit the sliding sleeves onto the round tubes. Sliding sleeves are installed on both sides of the round tubes. The diameter of the sliding sleeve is larger than the diameter of the round tube to ensure that the sliding sleeve can slide freely along the round tube and can rotate freely at the same time. Step 4, Install the fixing clamps: Install the fixing clamps on the upper flanges of the N-layer steel beam and the N+1-layer steel beam respectively. The transverse U-shaped clamps of the fixing clamps are tightened to the N-layer steel beam and the N+1-layer steel beam with tightening bolts to ensure that they do not slip. Step 5: Install double-layer cantilever safety nets. The double-layer cantilever safety nets are respectively 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 entire cantilever structure is adjusted to the correct size according to the outer contour line using an adjustable circular tube, it is hoisted using a tower crane. Once in place, a steel wire rope is pulled onto the sliding sleeve on the outside of the circular tube frame. 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 fixing clamp on the N+1 layer steel beam. When connecting to the sliding sleeve, a third bolt fastener is used for fixation.

9. The installation method as described in claim 8, characterized in that, In step 5, the mesh size of the safety net on the upper surface of the iron plate should not exceed 15mm, and the mesh size of the safety net on the lower surface should not exceed 30mm.

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