Supporting cantilever steel platform for high-altitude large cantilever structure construction of building outer eave

Abstract

The utility model relates to a supporting overhanging steel platform for construction of a high-altitude large overhanging structure of a building outer eave, which comprises a plurality of overhanging section steel girders mounted at the top of an upper-layer reinforced concrete beam through ground anchor round steel components. A first inclined support and a second inclined support are installed at the bottom of the cantilever end, extending out of the upper-layer reinforced concrete beam, of each cantilever steel main beam through connecting assemblies, and the bottoms of the first inclined supports and the bottoms of the second inclined supports are installed at the top of the middle-layer reinforced concrete beam through first embedded assemblies. A plurality of connecting beams are mounted at the top of the overhanging end, extending out of the upper-layer reinforced concrete beam, of the overhanging section steel main beam through U-shaped ring assemblies, and a plurality of steel pipe insertion positioning ribs are welded to the connecting beams; the lower-layer inclined steel column is mounted at the bottom of the middle-layer reinforced concrete beam through a second pre-embedded assembly; and the lower end of the lower-layer inclined steel column is mounted on the outer wall of the side wall corresponding to the upper surface of the lower-layer reinforced concrete beam through a third pre-embedded assembly. The supporting system is arranged in a double-layer mode, supporting strength, rigidity and stability are good, and safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a supporting cantilever steel platform for the construction of a high-altitude large cantilever structure of a building exterior. Background Art

[0002] With the development of high-rise buildings in my country, various special-shaped structures are increasingly appearing in urban building complexes, especially ultra-long span, large-section high-altitude cantilever structures. Due to the lack of relevant construction experience and construction specifications, traditional construction methods are greatly challenged.

[0003] The Chinese invention patent application with publication number CN110700543A relates to a steel truss diagonal brace system structure with steel section cantilever and its construction method, which adopts lightweight and small-sized truss diagonal braces to replace traditional large diagonal braces, greatly reducing the risk of installation and disassembly. However, there are also shortcomings. The strength of the cantilever structure support is not enough and may not meet the use requirements. The main beam and the diagonal beam are welded together and hoisted as a whole, which makes installation and disassembly inconvenient. Utility Model Content

[0004] The utility model aims to solve the deficiencies of the prior art and provides a cantilever steel platform for supporting the construction of a high-altitude large cantilever structure of a building exterior.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A cantilever steel platform for supporting the construction of a large cantilever structure of a building exterior, comprising a plurality of cantilever steel main beams installed on the top of an upper reinforced concrete beam through a ground anchor round steel assembly, a first oblique support and a second oblique support installed at the bottom of a cantilever end of each cantilever steel main beam extending out of the upper reinforced concrete beam through a connecting assembly, the bottoms of the first oblique support and the second oblique support being installed on the top of a middle reinforced concrete beam through a first embedded assembly, a zigzag reinforcing steel pipe assembly being arranged between the first oblique support and the second oblique support, a plurality of connecting beams being installed at the top of a cantilever end of the cantilever steel main beam extending out of the upper reinforced concrete beam through a U-shaped ring assembly, and a plurality of steel pipe plug-in positioning ribs being welded on the connecting beam;

[0007] It also includes a lower inclined steel column, the upper end of which is installed on the bottom of the middle reinforced concrete beam through a second embedded component, and the lower end of the lower inclined steel column is installed on the outer wall of the side wall corresponding to the upper surface of the lower reinforced concrete beam through a third embedded component.

[0008] The connecting assembly includes a first connecting plate welded on the front and rear sides of the bottom of the cantilever steel main beam, and a second connecting plate welded on the upper end of the first oblique support outer wall or the upper end of the second oblique support outer wall. The first connecting plate and the second connecting plate are correspondingly provided with a plurality of connecting holes. The first connecting plate and the second connecting plate are connected and fixed by bolts in the connecting holes. A connecting stiffening rib is provided between the bottom of the second connecting plate and the first oblique support outer wall or the second oblique support outer wall.

[0009] The ground anchor round steel assembly includes a round steel embedded in the upper reinforced concrete beam and an angle steel arranged on the top of the cantilevered steel main beam. The upper end of the round steel passes through the cantilevered steel main beam and the angle steel and is locked by a first nut.

[0010] The first embedded component includes a plurality of first embedded steel bars embedded in the top of the middle reinforced concrete beam, a first steel plate is welded to the top of the first embedded steel bars, the bottoms of the first oblique support and the second oblique support are welded to the first steel plate, and a first stiffening rib is provided on the first steel plate.

[0011] The zigzag-shaped reinforced steel pipe assembly includes a first inclined steel pipe, a horizontal steel pipe, and a second inclined steel pipe welded between a first inclined support and a second inclined support. The first inclined steel pipe, the horizontal steel pipe, and the second inclined steel pipe are arranged in a zigzag-shaped structure.

[0012] The U-shaped ring assembly includes a clamping steel plate arranged on the top of the connecting beam, and a U-shaped ring sleeved on the cantilevered steel main beam and the outside of the connecting beam. Two vertical rods of the U-shaped ring pass through the clamping steel plate and are locked by a second nut.

[0013] The second embedded component includes a plurality of second embedded steel bars embedded in the bottom of the middle reinforced concrete beam, a second steel plate is welded to the bottom of the second embedded steel bars, and the upper end of the lower inclined steel column is welded to the second steel plate.

[0014] The third embedded component includes a plurality of third embedded steel bars embedded in the side wall, a third steel plate is welded to the outer side of the third embedded steel bars, and the lower end of the lower inclined steel column is welded to the third steel plate.

[0015] The beneficial effects of the utility model are: the support system of the utility model is a double-layer setting, with good support strength, rigidity, stability and high safety; the support system materials can be circulated and reused, which is green, low-carbon and environmentally friendly; the diagonal brace and the cantilevered steel main beam are connected by bolts, which is easy to disassemble and assemble, and the connection stability of the diagonal brace and the embedded steel plate is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 for Figure 1 A is an enlarged schematic diagram;

[0018] Figure 3It is a structural schematic diagram of the connection assembly at the bottom of the cantilevered steel main beam;

[0019] Figure 4 It is a structural schematic diagram of the connection component at the upper end of the first inclined support or the second inclined support;

[0020] Figure 5 is a schematic structural diagram of a first embedded component;

[0021] Figure 6 It is a structural schematic diagram of a U-shaped ring assembly;

[0022] Figure 7 It is a schematic diagram of the cantilever steel main beam and the connecting beam connected by the U-shaped ring assembly;

[0023] Figure 8 is a schematic structural diagram of a second embedded component;

[0024] Fig. 9 is a schematic structural diagram of the third embedded component;

[0025] In the figure: 1-cantilever steel main beam; 2-first oblique support; 3-second oblique support; 4-ground anchor round steel assembly; 5-connection assembly; 6-first embedded assembly; 7-zigzag reinforcement steel pipe assembly; 8-U-shaped ring assembly; 9-connecting beam; 10-steel pipe plug-in positioning rib; 11-lower layer oblique steel column; 12-second embedded assembly; 13-third embedded assembly; 14-upper layer reinforced concrete beam; 15-middle layer reinforced concrete beam; 16-lower layer reinforced concrete beam; 17-side wall; 18-oblique vertical column; 19-oblique cable;

[0026] 41- round steel; 42- angle steel; 43- first nut;

[0027] 51-first connecting plate; 52-second connecting plate; 53-connecting hole; 54-connecting stiffening rib;

[0028] 61-first embedded steel bar; 62-first steel plate; 63-first stiffening rib;

[0029] 71-first inclined steel pipe; 72-horizontal steel pipe; 73-second inclined steel pipe;

[0030] 81-clamping steel plate; 82-U-shaped ring; 83-second nut;

[0031] 121-second embedded steel bar; 122-second steel plate;

[0032] 131-third embedded steel bar; 132-third steel plate;

[0033] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0035] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0037] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0038] A cantilever steel platform for supporting the construction of a large cantilever structure of a building exterior, comprising a plurality of cantilever steel main beams 1 installed on the top of an upper reinforced concrete beam 14 through a ground anchor round steel component 4, a first oblique support 2 and a second oblique support 3 are installed at the bottom of the cantilevered end of each cantilever steel main beam 1 extending out of the upper reinforced concrete beam 14 through a connecting component 5, the bottom of the first oblique support 2 and the second oblique support 3 are installed on the top of a middle reinforced concrete beam 15 through a first embedded component 6, a zigzag reinforced steel pipe component 7 is arranged between the first oblique support 2 and the second oblique support 3, and the cantilever steel main beam 1 extends out of the upper reinforced concrete beam 14. A plurality of connecting beams 9 are installed at the top of the cantilevered end of the beam 14 through a U-shaped ring component 8, and a plurality of steel pipe plug-in positioning ribs 10 are welded on the connecting beam 9; it also includes a lower inclined steel column 11, the upper end of the lower inclined steel column 11 is installed at the bottom of the middle reinforced concrete beam 15 through a second embedded component 12, and the lower end of the lower inclined steel column 11 is installed on the outer wall of the side wall 17 corresponding to the upper surface of the lower reinforced concrete beam 16 through a third embedded component 13, and also includes an inclined vertical column 18 installed on the top of the upper reinforced concrete beam 14, and a plurality of inclined cables 19 are installed between the side wall of the inclined vertical column 18 and the top of the cantilevered steel main beam 1.

[0039] Processing and production:

[0040] Take the construction of the 3-5 axis intersecting HG axis beam-slab structure of the project (elevation 73.85m) as an example, the length of the cantilevered area is 14.8m, the width is 3.3m, the cross-section of the cantilevered conversion beam is 1050×2000mm, and the plate thickness is 150mm:

[0041] The selected materials include: 25a I-beam, 16# I-beam, 120×8mm square steel pipe, 80×3mm square steel pipe, 14mm thick steel plate, 12mm thick steel plate, 16mm diameter high-strength bolts, 18mm diameter U-shaped parts, 20mm diameter threaded steel bars, and 25mm diameter threaded steel bars.

[0042] Through calculation, it is found that the cantilever steel main beam 1 adopts 25a I-steel, the maximum cantilever length of the cantilever steel main beam 1 is 4m, the maximum length of the cantilever steel main beam 1 anchored on the upper reinforced concrete beam 14 is 5m, and three ground anchor round steel assemblies 4 are arranged within the anchoring range to fix the cantilever steel main beam 1, of which two ground anchor round steel assemblies 4 are arranged at the inner anchoring end of the cantilever steel main beam 1, one of the two ground anchor round steel assemblies 4 is 200mm away from the inner anchoring end, the distance between the two ground anchor round steel assemblies 4 is 200mm, and the other ground anchor round steel assembly 4 is arranged at the outer anchoring end of the cantilever steel main beam 1 close to the cantilever end.

[0043] The anchor round steel assembly 4 includes a round steel 41 embedded in the upper reinforced concrete beam 14 and an angle steel 42 arranged on the top of the cantilevered steel main beam 1. The upper end of the round steel 41 passes through the cantilevered steel main beam 1 and the angle steel 42 and is locked by a first nut 43. The size of the round steel 41 is

[0044] According to load calculation, the spacing between two adjacent cantilever steel main beams 1 is 1200 mm. A plurality of 16# I-beam connecting beams 9 are arranged on the cantilever steel main beam 1 . The cantilever steel main beam 1 and the connecting beam 9 are fixed with a U-shaped ring assembly 8 .

[0045] The U-shaped ring assembly 8 includes a clamping steel plate 81 arranged on the top of the connecting beam 9, and a U-shaped ring 82 sleeved on the outside of the cantilevered steel main beam 1 and the connecting beam 9. The two vertical rods of the U-shaped ring 82 pass through the clamping steel plate 81 and are locked by a second nut 83. The diameter of the U-shaped ring 82 is 18 mm.

[0046] The steel pipe splicing positioning rib 10 is installed on the connecting beam 9. The steel pipe splicing positioning rib 10 adopts The threaded steel bar with a height of 150 mm is centrally welded and fixed to the connecting beam 9 to facilitate the subsequent insertion of the steel pipes of the steel pipe rack.

[0047] Two diagonal supports are arranged under the cantilever steel main beam 1. The diagonal supports are made of 120mm×8mm square steel tubes, namely the first diagonal support 2 and the second diagonal support 3. The first diagonal support 2 and the second diagonal support 3 are welded in a zigzag pattern using 80mm×3mm square steel tubes to increase the torsional strength of the diagonal supports.

[0048] The angle between the cantilever steel main beam 1 and the first oblique support 2 is 64.13°, and the angle between the cantilever steel main beam 1 and the second oblique support 3 is 47.04°. The distance between the first oblique support 2 and the cantilever end of the cantilever steel main beam 1 is 2500mm, and the distance between the second oblique support 3 and the cantilever end of the cantilever steel main beam 1 is 600mm.

[0049] The zigzag-shaped reinforcement steel pipe assembly 7 includes a first inclined steel pipe 71, a horizontal steel pipe 72 and a second inclined steel pipe 73 welded between the first inclined support 2 and the second inclined support 3. The first inclined steel pipe 71, the horizontal steel pipe 72 and the second inclined steel pipe 73 are arranged in a zigzag structure.

[0050] The cantilever steel main beam 1 is connected to the first oblique support 2 and the second oblique support 3 through a connecting assembly 5, which includes a first connecting plate 51 welded to the front and rear sides of the bottom of the cantilever steel main beam 1, and a second connecting plate 52 welded to the upper end of the outer wall of the first oblique support 2 or the upper end of the outer wall of the second oblique support 3. A plurality of connecting holes 53 are correspondingly opened on the first connecting plate 51 and the second connecting plate 52. The first connecting plate 51 and the second connecting plate 52 are connected and fixed by bolts in the connecting holes 53. A connecting stiffening rib 54 is provided between the bottom of the second connecting plate 52 and the outer wall of the first oblique support 2 or the outer wall of the second oblique support 3. The thickness of the first connecting plate 51 and the second connecting plate 52 is 14 mm, and eight 16 mm high-strength bolts are used for connection and reinforcement.

[0051] The lower layer inclined steel column 11 adopts 80mm×3mm square steel tube.

[0052] The first embedded component 6 includes a plurality of first embedded steel bars 61 embedded in the top of the middle reinforced concrete beam 15, a first steel plate 62 is welded to the top of the first embedded steel bars 61, the bottoms of the first inclined support 2 and the second inclined support 3 are welded to the first steel plate 62, and a first stiffening rib 63 is provided on the first steel plate 62.

[0053] The second embedded component 12 includes a plurality of second embedded steel bars 121 embedded in the bottom of the middle reinforced concrete beam 15 , a second steel plate 122 is welded to the bottom of the second embedded steel bars 121 , and the upper end of the lower inclined steel column 11 is welded to the second steel plate 122 .

[0054] The third embedded component 13 includes a plurality of third embedded steel bars 131 embedded in the side wall 17 . A third steel plate 132 is welded to the outer side of the third embedded steel bars 131 . The lower end of the lower inclined steel column 11 is welded to the third steel plate 132 .

[0055] The embedded steel plates used in the first embedded component 6, the second embedded component 12 and the third embedded component 13 are all Q235 steel plates with a thickness of 14 mm. The threaded steel is welded, the sizes of the first steel plate 62 and the second steel plate 122 are 400*400mm, the size of the third steel plate 132 is 200*700mm, and the first stiffening rib 63 is a 12mm thick steel plate.

[0056] The utility model is a cantilever steel platform system that is easy to operate, easy to obtain materials, can be reused, has good strength, rigidity and stability, and can ensure the safety of the construction of high-altitude large cantilever structures on the exterior eaves of buildings.

[0057] The support system of the utility model is a double-layer setting with good support strength, rigidity, stability and high safety; the materials of the support system can be circulated and reused, which is green, low-carbon and environmentally friendly; the diagonal brace and the cantilever steel main beam 1 are connected by bolts, which is convenient for disassembly and assembly, the connection stability of the diagonal brace and the embedded steel plate is good, the shape is beautiful and elegant, and the civilized construction effect is good; the cantilever steel main beam 1 uses I-beams as transverse connecting beams 9, and the connecting beams 9 and the cantilever steel main beam 1 are connected by U-shaped ring assemblies 8, and finally the steel pipes are welded on the upper part to insert the positioning ribs 10 to erect the frame.

[0058] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A cantilever steel platform for supporting the construction of a high-altitude cantilever structure of a building exterior, characterized in that: The invention comprises a plurality of cantilever steel main beams (1) installed on the top of an upper reinforced concrete beam (14) through a ground anchor round steel assembly (4); a first oblique support (2) and a second oblique support (3) are installed at the bottom of the cantilevered end of each cantilever steel main beam (1) extending out of the upper reinforced concrete beam (14) through a connection assembly (5); the bottoms of the first oblique support (2) and the second oblique support (3) are installed on the top of a middle reinforced concrete beam (15) through a first embedded assembly (6); a zigzag reinforcing steel pipe assembly (7) is provided between the first oblique support (2) and the second oblique support (3); a plurality of connecting beams (9) are installed at the top of the cantilevered end of the cantilever steel main beam (1) extending out of the upper reinforced concrete beam (14) through a U-shaped ring assembly (8); and a plurality of steel pipe insert positioning ribs (10) are welded to the connecting beams (9); It also includes a lower layer inclined steel column (11), the upper end of the lower layer inclined steel column (11) is installed on the bottom of the middle layer reinforced concrete beam (15) through a second embedded component (12), and the lower end of the lower layer inclined steel column (11) is installed on the outer wall of the side wall (17) corresponding to the upper surface of the lower layer reinforced concrete beam (16) through a third embedded component (13).

2. The supporting cantilever steel platform for the construction of a high-altitude large cantilever structure of a building exterior according to claim 1 is characterized in that: The connection assembly (5) comprises a first connection plate (51) welded to the front and rear sides of the bottom of the cantilever steel main beam (1), and a second connection plate (52) welded to the upper end of the outer wall of the first inclined support (2) or the upper end of the outer wall of the second inclined support (3). The first connection plate (51) and the second connection plate (52) are respectively provided with a plurality of connection holes (53). The first connection plate (51) and the second connection plate (52) are connected and fixed by bolts in the connection holes (53). A connection stiffening rib (54) is provided between the bottom of the second connection plate (52) and the outer wall of the first inclined support (2) or the outer wall of the second inclined support (3).

3. The supporting cantilever steel platform for the construction of a high-altitude large cantilever structure of a building exterior according to claim 1 is characterized in that: The ground anchor round steel assembly (4) comprises a round steel (41) pre-buried in an upper reinforced concrete beam (14) and an angle steel (42) arranged on the top of a cantilevered steel main beam (1); the upper end of the round steel (41) passes through the cantilevered steel main beam (1) and the angle steel (42) and is locked by a first nut (43).

4. The supporting cantilever steel platform for the construction of a high-altitude large cantilever structure of a building exterior according to claim 1 is characterized in that: The first embedded component (6) comprises a plurality of first embedded steel bars (61) embedded in the top of the middle layer reinforced concrete beam (15), a first steel plate (62) is welded to the top of the first embedded steel bars (61), the bottoms of the first inclined support (2) and the second inclined support (3) are welded to the first steel plate (62), and a first stiffening rib (63) is provided on the first steel plate (62).

5. The supporting cantilever steel platform for the construction of a high-altitude large cantilever structure of a building exterior according to claim 1 is characterized in that: The zigzag-shaped reinforcement steel pipe assembly (7) comprises a first inclined steel pipe (71), a horizontal steel pipe (72) and a second inclined steel pipe (73) which are welded between a first inclined support (2) and a second inclined support (3); the first inclined steel pipe (71), the horizontal steel pipe (72) and the second inclined steel pipe (73) are arranged in a zigzag-shaped structure.

6. The supporting cantilever steel platform for the construction of a high-altitude large cantilever structure of a building exterior according to claim 1 is characterized in that: The U-shaped ring assembly (8) comprises a clamping steel plate (81) arranged on the top of the connecting beam (9), and a U-shaped ring (82) sleeved on the outside of the cantilevered steel main beam (1) and the connecting beam (9). The two vertical rods of the U-shaped ring (82) pass through the clamping steel plate (81) and are locked by a second nut (83).

7. The supporting cantilever steel platform for the construction of a high-altitude large cantilever structure of a building exterior according to claim 1 is characterized in that: The second embedded component (12) comprises a plurality of second embedded steel bars (121) embedded in the bottom of the middle layer reinforced concrete beam (15), a second steel plate (122) is welded to the bottom of the second embedded steel bars (121), and the upper end of the lower layer inclined steel column (11) is welded to the second steel plate (122).

8. The supporting cantilever steel platform for the construction of a high-altitude large cantilever structure of a building exterior according to claim 1 is characterized in that: The third embedded component (13) comprises a plurality of third embedded steel bars (131) embedded in the side wall (17); a third steel plate (132) is welded to the outer side of the third embedded steel bars (131); and the lower end of the lower inclined steel column (11) is welded to the third steel plate (132).

9. The supporting cantilever steel platform for the construction of a high-altitude large cantilever structure of a building exterior according to claim 1 is characterized in that: It also includes an inclined vertical column (18) installed on the top of the upper reinforced concrete beam (14), and a plurality of inclined cables (19) are installed between the side wall of the inclined vertical column (18) and the top of the cantilevered steel main beam (1).

10. The supporting cantilever steel platform for the construction of a high-altitude large cantilever structure of a building exterior according to claim 1 is characterized in that: The included angle between the cantilever steel main beam (1) and the first oblique support (2) is 64.13°, and the included angle between the cantilever steel main beam (1) and the second oblique support (3) is 47.04°.

Images