CN112252698A - Super high-rise large cantilever steel truss construction platform - Google Patents
Super high-rise large cantilever steel truss construction platform Download PDFInfo
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- CN112252698A CN112252698A CN202011096941.1A CN202011096941A CN112252698A CN 112252698 A CN112252698 A CN 112252698A CN 202011096941 A CN202011096941 A CN 202011096941A CN 112252698 A CN112252698 A CN 112252698A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/18—Scaffolds essentially supported by building constructions, e.g. adjustable in height supported by cantilevers or other provisions mounted in openings in the building, e.g. window openings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/006—Scaffold with cantilevered sections, e.g. to accommodate overhangs or recesses in the facade
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
- E04G5/045—Means for fastening, supporting, or bracing scaffolds on or against building constructions for fastening scaffoldings on profiles, e.g. I or H profiles
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/14—Railings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/16—Struts or stiffening rods, e.g. diagonal rods
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/14—Railings
- E04G2005/148—Railings latticed or netted
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a super high-rise large-cantilever steel truss construction platform, which adopts triangular trusses as standard trusses, wherein every two standard trusses are connected through a connecting beam to form a hoisting joint; the standard truss is formed by connecting a platform main beam, a main inclined support, a vertical support, a secondary inclined support and an inter-support beam; the coupling beam comprises an upper coupling beam for connecting two adjacent platform main beams, a middle inner coupling beam for connecting two adjacent vertical supports, a middle outer coupling beam for connecting two adjacent main inclined struts and inclined web members for connecting the vertical supports and the main inclined struts; the platform main beam and the main inclined strut are integrally stressed with the finished structure through the embedded part; aiming at the construction of a super high-rise large cantilever structure, a cantilever steel truss platform is erected on the lower layer of the cantilever steel truss platform and serves as a supporting platform of a cantilever structure formwork support body, and meanwhile, the problem of conflict between the cantilever steel truss platform and the construction of a climbing frame is solved through secondary disassembly and assembly of the climbing frame, so that the structure construction quality can be guaranteed, the safety of field construction can be guaranteed, the construction period is shortened, and the engineering cost is saved.
Description
Technical Field
The invention belongs to the field of construction of constructional engineering, and particularly provides a super high-rise large cantilever steel truss construction platform.
Background
With the emergence of super high-rise buildings like spring bamboo shoots, real estate companies pursue diversification and viewing requirements of the form of the outer vertical face of the building, and a plurality of super-long overhanging structures are often arranged in the building structure design, which brings great difficulty and insecurity to construction. The low-rise building is cantilevered greatly, and a full frame is usually selected to be erected as a formwork support of the cantilever structure for construction. However, the large cantilever for the high-rise building cannot be applied to full-hall frame construction, the height of the frame body is too high and exceeds the set height allowed by the specification, the safety and the overall stability are poor, and safety accidents such as collapse and high falling are easy to happen.
Disclosure of Invention
The invention aims to provide a super high-rise large cantilever steel truss construction platform which is used for solving the problem that a super high-rise building large cantilever structure (the height is more than or equal to 200m, and the cantilever length is more than or equal to 6m) cannot be constructed by erecting a full formwork support.
The technical scheme of the invention is as follows: a super high-rise large cantilever steel truss construction platform adopts triangular trusses as standard trusses, and every two standard trusses are connected through a connecting beam to form a hoisting joint 3; the standard truss is formed by connecting a platform main beam 4, a main inclined support 5, a vertical support 6, a secondary inclined support 7 and an inter-support beam 8; the coupling beams comprise upper coupling beams 9 for connecting two adjacent platform main beams 4, middle inner coupling beams 10 for connecting two adjacent vertical supports 6, middle outer coupling beams 11 for connecting two adjacent main inclined struts 5 and inclined web members 12 for connecting the vertical supports 6 and the main inclined struts 5; the platform main beam 4 and the main inclined strut 5 form integral stress with the finished structure 14 through the embedded part 13; after the hoisting is finished, fully laying a steel plate 16 on the platform and fully welding the steel plate with the main beam 4 of the platform, and arranging safety protection railings 17 on three sides of the adjacent edge of the platform; 3 lifting lugs 18 are arranged on the platform main beam 4 of each standard truss.
Furthermore, the standard steel truss is made of 18# I-shaped steel, the strength of steel is Q235, the connection mode of the steel sections of all the parts is welding, the welding rod is E43, the height of the welding line is hf and 6mm, and the welding line L is 100mm for double-sided welding.
Furthermore, the embedded part 13 is made of Q235 steel plates, the size is 510 multiplied by 300 multiplied by 20mm, six HRB400 steel bars 15 with the diameter of 20mm and the length of 500mm are subjected to plug welding through holes on the steel plates, the steel bars are arranged in 3 rows along the length direction of the steel plates at the interval of 230mm, and are arranged in 2 rows along the short direction of the steel plates at the interval of 260 mm.
Further, the steel plate 16 is a Q235 steel plate, the thickness is 10mm, and the paving width is the same as the width of the steel truss construction platform.
Furthermore, the lifting lugs 18 are made of Q235 steel plates, the size of each lifting lug is 100 multiplied by 10mm, a lifting hole is formed in the middle of each lifting lug, the diameter of each lifting lug is 45mm, the distance between each first lifting lug 18 and the front end of the corresponding platform girder 4 is 100mm, the distance between each second lifting lug and the front end of the corresponding platform girder 4 is 2550mm, and the distance between each third lifting lug and the front end of the corresponding platform girder 4 is 4550 mm.
Further, safety protection railing 17 adopts 50X 3mm square tube to make, including three vertical posts 19 and the horizontal railing 20 of twice, vertical post 19 height is 1200mm, and the horizontal interval is 1500mm, sets up the horizontal railing 20 of twice in 1200mm high range, and the interval is 600mm, sets up close mesh safety net 21 in the railing scope, sets up in the bottom 300mm within range and keeps off the sole 22.
The invention has the following beneficial effects:
aiming at the construction of a super high-rise large cantilever structure, the cantilever steel truss platform is erected on the lower layer of the cantilever steel truss platform and serves as a supporting platform of a cantilever structure formwork support body, and meanwhile, the problem of conflict between the cantilever steel truss platform and the construction of a climbing frame is solved through secondary disassembly and assembly of the climbing frame. The construction quality of the structure can be guaranteed, the safety of on-site construction can be guaranteed, the construction period is shortened, and the engineering cost is saved.
The invention adopts triangular trusses as standard trusses, and each two trusses form a hoisting joint. An embedded part is arranged on the boundary beam of the next layer of the large cantilever structure layer and is welded with the steel truss, so that an effective stress system is formed and is used for bearing construction loads in the process of erecting the cantilever plate formwork and the climbing frame.
After the structure construction is finished, the invention can be continuously utilized and used as an operation platform for decoration of the outer vertical surface, installation and construction of curtain walls and the like.
The steel structure material can be recycled, no waste exists, energy is saved, environment is protected, and the construction cost can be reduced.
The invention has strong flexibility and applicability, and can provide reference for construction of cantilever structures of super high-rise buildings and the like.
Drawings
FIG. 1 is a plan view of the platform of the cantilever steel truss of the present invention;
FIG. 2 is an elevational view of an overhanging steel truss platform of the present invention;
FIG. 3 is a layout view of the middle horizontal supports and steel beams according to the present invention;
FIG. 4 is an elevational view of the placement of an embedment member in the present invention;
FIG. 5 is a plan view of the arrangement of embedment members in the present invention;
FIG. 6 is a cross-sectional view of a triangular steel truss at a structural beam in accordance with the present invention;
FIG. 7 is a cross-sectional view of a triangular steel truss at a structural column in accordance with the present invention;
FIG. 8 is a master view (front view) of an embedded part according to the present invention;
FIG. 9 is a schematic view (side view) of an embedment of the present invention;
FIG. 10 is a perspective view of the guard rail of the present invention;
FIG. 11 is a schematic structural view of the steel plate after full-spread;
in the figure: 3. hoisting the joints; 4. a platform main beam; 5. a main diagonal brace; 6. vertical support; 7. a secondary diagonal bracing; 8. supporting the intermediate beam; 9. an upper coupling beam; 10. the middle inner side is connected with a beam; 11. the middle part of the beam is connected with the outer side of the beam; 12. a diagonal web member; 13. embedding parts; 14. the structure is finished; 15. reinforcing steel bars; 16. a steel plate; 17. a guard rail; 18. lifting lugs; 19. a vertical column; 20. a transverse rail; 21. a dense mesh safety net; 22. a foot baffle plate.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
As shown in fig. 1-11, a super high-rise large cantilever steel truss construction platform adopts triangular trusses as standard trusses, every two standard trusses are connected through a connecting beam to form a hoisting joint 3, and the hoisting joint 3 is composed of 10 hoisting joints in total; the standard truss is formed by connecting a platform main beam 4, a main inclined strut 5, a vertical strut 6, a secondary inclined strut 7 and an inter-strut beam 8; the coupling beams comprise upper coupling beams 9 for connecting two adjacent platform main beams 4, middle inner coupling beams 10 for connecting two adjacent vertical supports 6, middle outer coupling beams 11 for connecting two adjacent main inclined struts 5 and inclined web members 12 for connecting the vertical supports 6 and the main inclined struts 5; the platform main beam 4 and the main inclined strut 5 form integral stress with the finished structure 14 through the embedded part 13; after the hoisting is finished, fully laying a steel plate 16 on the platform and fully welding the steel plate with the main beam 4 of the platform, and arranging safety protection railings 17 on three sides of the adjacent edge of the platform; 3 lifting lugs 18 are arranged on the platform main beam 4 of each standard truss.
In the embodiment of the invention, standard steel beams are 18# I-shaped steel, the strength of the steel is Q235, the connection mode of the steel beams is welding, a welding rod is E43, the height of a welding seam is hf to be 6mm, and the welding seam L to be 100mm is double-sided welding.
In the embodiment of the invention, the embedded part 13 is made of Q235 steel plates with the size of 510 multiplied by 300 multiplied by 20mm, six HRB400 steel bars 15 with the diameter of 20mm and the length of 500mm are subjected to plug welding through holes on the steel plates, the steel bars are arranged in 3 rows along the length direction of the steel plates at the interval of 230mm, and are arranged in 2 rows along the short direction of the steel plates at the interval of 260 mm.
In the embodiment of the invention, the steel plate 16 is a Q235 steel plate, the thickness is 10mm, and the paving width is the same as the width of the steel truss construction platform.
In the embodiment of the invention, the lifting lugs 18 are Q235 steel plates, the size is 100 multiplied by 10mm, the middle part of each lifting lug is provided with a lifting hole, the diameter is 45mm, and the first lifting lug 18 is 100mm away from the front end of the platform girder 4 and is a lifting lug during dismantling; the distance between the second lifting lug and the front end of the platform main beam 4 is 2550 mm; the distance between the third lifting lug and the front end of the platform girder 4 is 4550mm, and the third lifting lug is a lifting lug during installation.
In the embodiment of the invention, the safety protection handrail 17 is made of a 50 × 50 × 3mm square tube and comprises three vertical columns 19 and two transverse railings 20, wherein the height of each vertical column 19 is 1200mm, the horizontal distance is 1500mm, the two transverse railings 20 are arranged within the height range of 1200mm, the distance is 600mm, a fine mesh safety net 21 is arranged within the railing range, and a foot baffle plate 22 is arranged within the bottom 300mm range.
During the structural construction, the early strength agents with different degrees are added to the local concrete beam connected with the steel platform, sufficient concrete test blocks with the same conditions are reserved, and after a detection report is obtained and the strength of the concrete reaches 100 percent, the hoisting sections can be installed and fixed.
As the size of a single hoisting section exceeds the transportation range, the blanking parts are transported in advance in a processing plant according to a steel structure deepening drawing and transported to the site for assembly. Firstly, a simple jig frame is erected on the ground open space close to the horizontal projection position of the mounting platform, after the jig frame is erected, the tower crane is assembled in a matched mode, each part is assembled in a single piece according to a drawing, after the assembly is completed, the welding is checked and carried out without errors, a single hoisting section is formed after the welding is completed, and the tower crane is hoisted to a designated position to be sequentially mounted.
The platform dismantling sequence is opposite to the installation sequence, after a steel wire rope of the tower crane is connected with hoisting joints before dismantling, steel plate and steel beam members connected between every hoisting joint are dismantled firstly and transferred to a safety range in a building, then the connection pivot of the hoisting joints and the structure is dismantled, the dismantled members are fixed by adopting a manual hoist for ensuring safety, and the dismantling process is avoided from slipping.
The manufacture and installation of the embedded part are strictly carried out according to the design requirements, and the installation positioning deviation of the embedded part cannot exceed [ -15mm, 15mm ]. The welding construction quality of the steel platform and the structural connection support is guaranteed, temporary fixation and wind and fire prevention measures are required to be set in the welding process. Before the section steel beams and the steel plates between the hoisting joints are installed, a double-layer dense mesh safety net is arranged in the area between the hoisting joints of the steel platform, and the specification and the quality of the safety net meet the requirements of relevant specifications so as to ensure the construction safety of operating personnel.
The embodiment can be adjusted according to actual conditions, and the embodiment only briefly describes the cantilever steel truss construction platform under specific conditions.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (6)
1. A super high-rise large-cantilever steel truss construction platform is characterized in that a triangular truss is adopted as a standard truss for the super high-rise large-cantilever steel truss construction platform, and every two standard trusses are connected through a connecting beam to form a hoisting joint (3); the standard truss is formed by connecting a platform main beam (4), a main inclined support (5), a vertical support (6), a secondary inclined support (7) and an inter-support beam (8); the coupling beams comprise upper coupling beams (9) for connecting two adjacent platform main beams (4), middle inner coupling beams (10) for connecting two adjacent vertical supports (6), middle outer coupling beams (11) for connecting two adjacent main inclined struts (5) and inclined web members (12) for connecting the vertical supports (6) and the main inclined struts (5); the platform main beam (4) and the main inclined strut (5) form integral stress with the finished structure (14) through the embedded part (13); after the hoisting is finished, fully laying a steel plate (16) on the platform and fully welding the steel plate with the platform main beam (4), and arranging safety protection railings (17) on three sides of the platform edge; 3 lifting lugs (18) are arranged on the platform main beam (4) of each standard truss.
2. The super high-rise large cantilever steel truss construction platform as claimed in claim 1, wherein the standard steel truss is 18# I-steel, the steel strength is Q235, the connection mode of the steel truss parts is welding, the welding rod is E43, the height of the welding seam is hf-6 mm, and the welding seam L-100 mm is double-sided welding.
3. The super high-rise large cantilever steel truss construction platform according to claim 1, wherein the embedded part (13) is made of Q235 steel plates with the size of 510 x 300 x 20mm, six HRB400 steel bars (15) with the diameter of 20mm and the length of 500mm are subjected to plug welding through holes in the steel plates, the steel bars are arranged in 3 rows along the length direction of the steel plates at the interval of 230mm, and in 2 rows along the short direction of the steel plates at the interval of 260 mm.
4. The super high-rise large cantilever steel truss construction platform as claimed in claim 1, wherein the steel plate (16) is Q235 steel plate with a thickness of 10mm and a laying width equal to the width of the steel truss construction platform.
5. The super high-rise large cantilever steel truss construction platform of claim 1, wherein the lifting lugs (18) are Q235 steel plates with the size of 100 x 10mm, a lifting hole is formed in the middle of the lifting lugs, the diameter of the lifting lugs is 45mm, the first lifting lug (18) is 100mm away from the front end of the platform girder (4), the second lifting lug is 2550mm away from the front end of the platform girder (4), and the third lifting lug is 4550mm away from the front end of the platform girder (4).
6. The super high-rise large cantilever steel truss construction platform according to claim 1, wherein the safety protection railings (17) are made of a 50 x 3mm square tube and comprise three vertical columns (19) and two transverse railings (20), the height of each vertical column (19) is 1200mm, the horizontal distance is 1500mm, the two transverse railings (20) are arranged within the height range of 1200mm, the distance is 600mm, a fine mesh safety net (21) is arranged within the railing range, and a foot blocking plate (22) is arranged within the bottom 300mm range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011096941.1A CN112252698A (en) | 2020-10-14 | 2020-10-14 | Super high-rise large cantilever steel truss construction platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011096941.1A CN112252698A (en) | 2020-10-14 | 2020-10-14 | Super high-rise large cantilever steel truss construction platform |
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| CN112252698A true CN112252698A (en) | 2021-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011096941.1A Pending CN112252698A (en) | 2020-10-14 | 2020-10-14 | Super high-rise large cantilever steel truss construction platform |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112095798A (en) * | 2020-08-31 | 2020-12-18 | 中国建筑第八工程局有限公司 | Super high-rise double-layer super large cantilever steel structure |
| CN114033036A (en) * | 2021-12-09 | 2022-02-11 | 中国建筑第八工程局有限公司 | Construction method of annular tower steel structure of small-diameter super high-rise landscape tower |
| CN115787996A (en) * | 2022-12-05 | 2023-03-14 | 中建八局第二建设有限公司 | Overhung construction method and overhung frame for super-high building |
-
2020
- 2020-10-14 CN CN202011096941.1A patent/CN112252698A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112095798A (en) * | 2020-08-31 | 2020-12-18 | 中国建筑第八工程局有限公司 | Super high-rise double-layer super large cantilever steel structure |
| CN112095798B (en) * | 2020-08-31 | 2022-04-12 | 中国建筑第八工程局有限公司 | Super high-rise double-layer super large cantilever steel structure |
| CN114033036A (en) * | 2021-12-09 | 2022-02-11 | 中国建筑第八工程局有限公司 | Construction method of annular tower steel structure of small-diameter super high-rise landscape tower |
| CN115787996A (en) * | 2022-12-05 | 2023-03-14 | 中建八局第二建设有限公司 | Overhung construction method and overhung frame for super-high building |
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