Steel structure truss cantilever structure reducing difficulty of high-altitude construction and construction method thereof

Abstract

The present application relates to a kind of steel structure truss cantilever structure and its construction method for reducing high-altitude construction difficulty, belong to truss cantilever structure construction technical field.It includes vertically arranged structure wall, the upper edge of the structure wall is provided with connecting transition floor, the side of the connecting transition floor away from structure wall, wall outer concrete beam is arranged along its length direction, the lower of the wall outer concrete beam is hung with the cantilever truss main body installed by hoisting assembly, the tail end of the cantilever truss main body is fixed on the outer side of structure wall.The hoisting assembly includes front side cable-stayed support fixed on the front side of wall outer concrete beam and rear side cable-stayed support fixed on the rear side of wall outer concrete beam, the front side cable-stayed support is detachably connected with the pipe truss below front side cable-stayed support by suspender A, the present application has the following beneficial effects: convenient to erect, construction, low labor intensity, low cost, can satisfy large-span steel structure truss cantilever design.

Description

Technical Field

[0001] This invention relates to a steel truss cantilever structure and its construction method for reducing the difficulty of high-altitude construction, belonging to the field of truss cantilever structure construction technology. Background Technology

[0002] With the increasing functional requirements of modern buildings, the facades of high-rise and super high-rise buildings are becoming more diverse and innovative. Many buildings utilize voids to achieve environmental transparency and visual variation, highlighting the building's majestic appearance through the interplay of light and shadow on the facade and the interplay of solid and void in the space. Large-span building voids are connected in mid-air by a reinforced concrete large-scale transfer beam-slab structure, forming a unified whole above the void. Traditionally, this involves ground-supported high-formwork, erecting full-span scaffolding up to the high-level transfer beam-slab. This method is cumbersome, labor-intensive, requires a large amount of construction materials, has a long construction period, and is costly.

[0003] Patent application CN201220639286.4 discloses a high-span steel-concrete truss formwork. The truss formwork includes a steel truss, suspended steel pipes, a lower chord, and a lower chord beam formwork. The steel truss is cantilevered or erected on a reinforced concrete slab. The upper end of the suspended steel pipe passes through the reinforced concrete slab and connects to both sides of the steel truss. The lower end of the suspended steel pipe suspends the lower chord. The lower chord beam formwork is suspended from the steel truss located at the upper end of the reinforced concrete slab by the suspended steel pipe passing through the slab. By using a steel truss to suspend the lower chord and lower chord beam formwork below the reinforced concrete slab, and using the lower chord as an operating platform for pouring the lower chord beam formwork, this method meets the requirements for truss formwork erection for pouring high-span steel-concrete lower chord beams. Its structure is simple, and assembly, use, and disassembly are convenient. It effectively solves the need for high-altitude formwork support for large-span building openings, improves construction efficiency, reduces labor intensity, and lowers construction costs.

[0004] While the aforementioned patents can enable the construction of cantilevered steel truss structures, current technology is not comprehensive and has the following drawbacks: The current practice is to clean the exhaust pipe filter screen periodically. This approach has the following drawbacks: cleaning too frequently will affect production efficiency; cleaning too infrequently will result in slow pressure release when the exhaust pipe is depressurized, which will also affect production efficiency.

[0005] To address one of the aforementioned problems, there is an urgent need for a steel truss cantilever structure and its construction method that can reduce the difficulty of high-altitude construction. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to construct a steel truss cantilever structure using clear and economical construction steps to form a large cantilever structure for which the tail end counterweight is insufficient. To this end, a steel truss cantilever structure and its construction method that reduce the difficulty of high-altitude construction are provided, which has the advantages of wide applicability and strong practicality.

[0007] The steel truss cantilever structure for reducing the difficulty of high-altitude construction according to the present invention includes a vertically arranged structural wall. The structure is characterized in that: a connecting transition floor is provided on the upper edge of the structural wall; a concrete beam is provided on the side of the connecting transition floor away from the structural wall along its length; a cantilever truss main body is suspended below the concrete beam by a hoisting assembly; and the tail end of the cantilever truss main body is fixed to the outer surface of the structural wall.

[0008] Preferably, the hoisting assembly includes a front diagonal brace fixed to the front side of the concrete beam outside the wall and a rear diagonal brace fixed to the rear side of the concrete beam outside the wall. The front diagonal brace is detachably connected to the tubular truss below the front diagonal brace via a hanger A, and the rear diagonal brace is detachably connected to the tubular truss below the rear diagonal brace via a hanger B.

[0009] Preferably, the cantilever truss main body includes a tubular truss, and the tail end of the tubular truss is provided with a tail wall connector, and the tail end of the tubular truss is fixed to the structural wall through the tail wall connector.

[0010] Preferably, the front diagonal bracing includes a horizontally arranged first weighing beam. The tail end of the first weighing beam is hinged to the lower hinge seat B at the bottom of the concrete beam outside the wall. The end of the first weighing beam away from the lower hinge seat B is hinged to a first diagonal brace via a lower hinge seat A. The other end of the first diagonal brace is hinged to the upper hinge seat A at the top of the concrete beam outside the wall. The angle between the first weighing beam and the first diagonal brace is an acute angle. Multiple sets of vertically arranged hangers A are equidistantly arranged along the length of the first weighing beam. The bottom ends of the hangers A are all fixedly connected to the tubular truss.

[0011] Preferably, the front diagonal bracing includes a horizontally arranged second weighing beam. The tail end of the second weighing beam is hinged to the lower hinge seat D at the bottom of the concrete beam outside the wall. The end of the second weighing beam away from the lower hinge seat D is hinged to a second diagonal brace via the lower hinge seat C. The other end of the second diagonal brace is hinged to the upper hinge seat B at the top of the concrete beam 2 outside the wall. The angle between the second weighing beam and the second diagonal brace is an acute angle. Multiple sets of vertically arranged hangers B are equidistantly arranged along the length of the second weighing beam. The bottom ends of the hangers B are all fixedly connected to the tubular truss.

[0012] Preferably, a first sling is installed on the outer surface of the connecting transition floor slab, the other end of the first sling is connected to the tubular truss, and the end of the first sling is connected to an anchor rod A pre-embedded in the connecting transition floor slab. Preferably, a second sling is installed on the outer wall of the structural wall, the second sling is located below the tubular truss, and its end away from the structural wall is fixed to the tail end of the tubular truss, and one end of the second sling is connected to an anchor rod B pre-embedded in the structural wall.

[0013] Preferably, the lower surface of the external concrete beam of the wall is provided with an upper main lifting lug, and the tubular truss is provided with a lower main lifting lug that cooperates with the upper main lifting lug. The upper and lower main lifting lugs are hinged together by a main connecting pin. Preferably, the lifting rod A includes an upper insert pipe welded to the first weighing lifting beam and a lower insert pipe welded to the tubular truss. The other ends of the upper and lower insert pipes are respectively inserted into the two ends of the middle sleeve and welded to the middle sleeve. The structure of the lifting rod A is the same as that of the lifting rod B.

[0014] Preferably, the tubular truss includes upper and lower truss tubes that are parallel to each other, and the upper and lower truss tubes are connected by truss connecting bars. This invention also discloses a construction method for a steel truss cantilever structure that reduces the difficulty of high-altitude construction, characterized by comprising the following steps: S1, using concrete and steel bars to construct a connecting transition floor slab with precast concrete beams on the outside of the wall in the factory, and pre-embed a seat B connected to the first sling on the connecting transition floor slab, and pre-embed an upper hinge seat A, a lower hinge seat B, an upper hinge seat B, a lower hinge seat D and an upper main lifting lug on the concrete beams on the outside of the wall. S2, Construct the structural wall using concrete and steel bars at the construction site, and connect the prefabricated components from step S1 to the structural wall using a crane at the construction site; S3, Install front and rear diagonal bracing on the concrete beam outside the wall, and weld inserts onto the front and rear diagonal bracing. S4, the tubular truss is prefabricated in the factory, and the lower insert is welded onto the tubular truss, and the middle sleeve is fitted onto the lower insert. S5, use a crane to lift the tubular truss so that the upper main lifting lug and the lower main lifting lug fit together; S6, the lower main lifting lug and the upper main lifting lug are connected by the main connecting pin, and then the tube truss is connected to the tail wall connecting seat on the structural wall; S7. After aligning the lower insertion tube with the upper insertion tube, raise the position of the middle sleeve so that the upper and lower ends of the middle sleeve are respectively inserted with the upper insertion tube and the lower insertion tube. Then, use a welding machine to weld the middle sleeve of the upper insertion tube and the lower insertion tube respectively. S8, fix the second sling and the first sling in the installation position respectively.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The steel truss cantilever structure and its construction method described in this invention reduce the difficulty of high-altitude construction. They are easy to erect and construct, have low labor intensity and low cost, and can meet the requirements of large-span steel truss cantilever design.

[0016] The steel truss cantilever structure and its construction method for reducing the difficulty of high-altitude construction described in this invention have a clear principle, simple and reasonable force transmission, and high reliability.

[0017] The steel truss cantilever structure and its construction method described in this invention reduce the difficulty of high-altitude construction. The steel truss cantilever structure is constructed using clear and economical construction steps, forming a large cantilever structure for insufficient tail-end counterweight. It has a wide range of applications and strong practicality. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Structural diagram of the hoisting assembly; Figure 3 This is a schematic diagram of the internal structure of the lifting rod A of the present invention; In the diagram: 1. Structural wall; 2. External concrete beam of the wall; 3. Connecting transition floor slab; 4. Front diagonal bracing; 4.1. First weighing lifting beam; 4.2. First diagonal brace; 4.3. Lower hinge seat A; 4.4. Upper hinge seat A; 4.5. Lower hinge seat B; 5. Rear diagonal bracing; 5.1. Second weighing lifting beam; 5.2. Second diagonal brace; 5.3. Lower hinge seat C; 5.4. Upper hinge seat B; 5.5. Lower hinge seat D; 6. Pipe truss; 7. Hanger A; 8. Hanger B; 9. Tail wall connecting seat; 10. First lifting cable; 11. Second lifting cable; 12. Upper main lifting lug; 13. Lower main lifting lug; 14. Main connecting pin; 15. Upper insert pipe; 16. Lower insert pipe; 17. Middle sleeve. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings. The present invention will be further illustrated by specific embodiments, but it is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0021] Example 1, as Figure 1-2 As shown, the steel truss cantilever structure that reduces the difficulty of high-altitude construction includes a vertically arranged structural wall 1. A connecting transition floor 3 is provided on the upper edge of the structural wall 1. On the side of the connecting transition floor 3 away from the structural wall 1, an external concrete beam 2 is provided along its length. A cantilever truss main body is suspended below the external concrete beam 2 and installed by a hoisting assembly. The tail end of the cantilever truss main body is fixed to the outer side of the structural wall 1.

[0022] Example 2, as Figure 1-3 As shown, the steel truss cantilever structure that reduces the difficulty of high-altitude construction includes a vertically arranged structural wall 1. A connecting transition floor 3 is provided on the upper edge of the structural wall 1. On the side of the connecting transition floor 3 away from the structural wall 1, an external concrete beam 2 is provided along its length. A cantilever truss main body is suspended below the external concrete beam 2 and installed by a hoisting assembly. The tail end of the cantilever truss main body is fixed to the outer side of the structural wall 1.

[0023] Furthermore, the hoisting assembly includes a front diagonal brace 4 fixed to the front side of the external concrete beam 2 and a rear diagonal brace 5 fixed to the rear side of the external concrete beam 2. The front diagonal brace 4 is detachably connected to the tubular truss 6 below the front diagonal brace 4 via a hanger A7, and the rear diagonal brace 5 is detachably connected to the tubular truss 6 below the rear diagonal brace 5 via a hanger B8.

[0024] Furthermore, the cantilever truss main body includes a tubular truss 6, and the tail end of the tubular truss 6 is provided with a tail wall connecting seat 9. The tail end of the tubular truss 6 is fixed to the structural wall 1 through the tail wall connecting seat 9.

[0025] Furthermore, the front diagonal bracing 4 includes a horizontally arranged first weighing beam 4.1. The tail end of the first weighing beam 4.1 is hinged to the lower hinge seat B4.5 at the bottom of the concrete beam 2 outside the wall. The end of the first weighing beam 4.1 away from the lower hinge seat B4.5 is hinged to a first diagonal brace 4.2 via a lower hinge seat A4.3. The other end of the first diagonal brace 4.2 is hinged to the upper hinge seat A4.4 at the top of the concrete beam 2 outside the wall. The angle between the first weighing beam 4.1 and the first diagonal brace 4.2 is an acute angle. Multiple sets of vertically arranged suspension rods A7 are equidistantly arranged along the length direction of the first weighing beam 4.1. The bottom ends of the suspension rods A7 are all fixedly connected to the tubular truss 6.

[0026] Furthermore, the front diagonal bracing 4 includes a horizontally arranged second weighing beam 5.1. The tail end of the second weighing beam 5.1 is hinged to the lower hinge seat D5.5 at the bottom of the concrete beam 2 outside the wall. The end of the second weighing beam 5.1 away from the lower hinge seat D5.5 is hinged to a second diagonal brace 5.2 via a lower hinge seat C5.3. The other end of the second diagonal brace 5.2 is hinged to the upper hinge seat B5.4 at the top of the concrete beam 2 outside the wall. The angle between the second weighing beam 5.1 and the second diagonal brace 5.2 is an acute angle. Multiple sets of vertically arranged suspension rods B8 are equidistantly arranged along the length of the second weighing beam 5.1. The bottom ends of the suspension rods B8 are all fixedly connected to the tubular truss 6.

[0027] Furthermore, a first suspension cable 10 is installed on the outer surface of the connecting transition floor slab 3. The other end of the first suspension cable 10 is connected to the tubular truss 6, and the end of the first suspension cable 10 is connected to the anchor rod A pre-embedded in the connecting transition floor slab 3. Furthermore, a second suspension cable 11 is installed on the outer wall of the structural wall 1. The second suspension cable 11 is located below the tubular truss 6, and its end away from the structural wall 1 is fixed to the tail end of the tubular truss 6. One end of the second suspension cable 11 is connected to the anchor rod B pre-embedded in the structural wall 1.

[0028] Furthermore, the lower surface of the external concrete beam 2 of the wall is provided with an upper main lifting lug 12, and the pipe truss 6 is provided with a lower main lifting lug 13 that cooperates with the upper main lifting lug 12. The upper main lifting lug 12 and the lower main lifting lug 13 are hingedly connected by a main connecting pin 14.

[0029] Furthermore, the lifting rod A7 includes an upper insert 15 welded to the first weighing lifting beam 4.1 and a lower insert 16 welded to the pipe truss 6. The other ends of the upper insert 15 and the lower insert 16 are respectively inserted into the two ends of the middle sleeve 17 and welded to the middle sleeve 17. The lifting rod A7 has the same structure as the lifting rod B8.

[0030] Furthermore, the tubular truss 6 includes upper truss tubes and lower truss tubes that are parallel to each other, and the upper truss tubes and lower truss tubes are connected by truss connecting ribs.

[0031] Example 3, the construction method for the steel truss cantilever structure that reduces the difficulty of high-altitude construction, includes the following steps: S1, using concrete and steel bars, a connecting transition floor slab 3 with a precast concrete beam 2 outside the wall is constructed in the factory, and a seat B connected to the first sling 10 is pre-embedded on the connecting transition floor slab 3, and an upper hinge seat A4.4, a lower hinge seat B4.5, an upper hinge seat B5.4, a lower hinge seat D5.5 and an upper main lifting lug 12 are pre-embedded on the concrete beam 2 outside the wall. S2, Construct structural wall 1 using concrete and steel bars at the construction site, and connect the prefabricated components from step S1 to structural wall 1 using a crane at the construction site. S3, install the front diagonal bracing 4 and the rear diagonal bracing 5 on the concrete beam 2 outside the wall, and weld the insertion pipe 15 on the front diagonal bracing 4 and the rear diagonal bracing 5. S4, prefabricate the tubular truss 6 in the factory, weld the lower insert pipe 16 onto the tubular truss 6, and fit the middle sleeve 17 onto the lower insert pipe 16; S5, use a crane to lift the tubular truss 6 so that the upper main lifting lug 12 and the lower main lifting lug 13 fit together; S6, the lower main lifting lug 13 and the upper main lifting lug 12 are connected by the main connecting pin 14, and then the pipe truss 6 is connected to the tail wall connecting seat 9 on the structural wall 1. S7, after the lower insertion tube 16 is aligned with the upper insertion tube 15, the position of the middle sleeve 17 is raised so that the upper and lower ends of the middle sleeve 17 are respectively inserted into the upper insertion tube 15 and the lower insertion tube 16. Then, the upper insertion tube 15 and the lower insertion tube 16 are welded to the middle sleeve 17 using a welding machine. S8, fix the second sling 11 and the first sling 10 in the installation position respectively.

[0032] Compared with the prior art, the present invention has the following beneficial effects: The steel truss cantilever structure and its construction method described in this invention reduce the difficulty of high-altitude construction. They are easy to erect and construct, have low labor intensity and low cost, and can meet the requirements of large-span steel truss cantilever design.

[0033] The steel truss cantilever structure and its construction method for reducing the difficulty of high-altitude construction described in this invention have a clear principle, simple and reasonable force transmission, and high reliability.

[0034] The steel truss cantilever structure and its construction method described in this invention reduce the difficulty of high-altitude construction. The steel truss cantilever structure is constructed using clear and economical construction steps, forming a large cantilever structure for insufficient tail-end counterweight. It has a wide range of applications and strong practicality.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

[0036] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A steel truss cantilever structure for reducing the difficulty of high-altitude construction, comprising vertically arranged structural walls, characterized in that: A connecting transition floor slab is provided at the upper edge of the structural wall. On the side of the connecting transition floor slab away from the structural wall, an external concrete beam is provided along its length. A cantilever truss main body, installed via a hoisting assembly, is suspended below the external concrete beam. The tail end of the cantilever truss main body is fixed to the outer surface of the structural wall. The hoisting assembly includes a front diagonal brace fixed to the front side of the external concrete beam and a rear diagonal brace fixed to the rear side of the external concrete beam. The front diagonal brace is detachably connected to a tubular truss below it via a hanger A. The rear diagonal brace is detachably connected to the tubular truss below it via a hanger B. The cantilever truss main body includes... A tubular truss is provided at its tail end with a tail wall connector. The tail end of the tubular truss is fixed to the structural wall via the tail wall connector. The front diagonal bracing includes a horizontally arranged first weighing beam. The tail end of the first weighing beam is hinged to a lower hinge seat B at the bottom of the concrete beam outside the wall. A first diagonal brace is hinged to one end of the first weighing beam away from the lower hinge seat B via a lower hinge seat A. The other end of the first diagonal brace is hinged to an upper hinge seat A at the top of the concrete beam outside the wall. The angle between the first weighing beam and the first diagonal brace is an acute angle. Multiple sets of vertically arranged hangers A are equidistantly arranged along the length of the first weighing beam. The bottom ends of the hangers A are all fixedly connected to the tubular truss.

2. The steel truss cantilever structure for reducing the difficulty of high-altitude construction according to claim 1, characterized in that, The rear diagonal bracing includes a horizontally arranged second weighing beam. The tail end of the second weighing beam is hinged to the lower hinge seat D at the bottom of the concrete beam outside the wall. The end of the second weighing beam away from the lower hinge seat D is hinged to a second diagonal brace via a lower hinge seat C. The other end of the second diagonal brace is hinged to the upper hinge seat B at the top of the concrete beam outside the wall. The angle between the second weighing beam and the second diagonal brace is an acute angle. Multiple sets of vertically arranged hangers B are equidistantly arranged along the length of the second weighing beam. The bottom ends of the hangers B are all fixedly connected to the tubular truss.

3. The steel truss cantilever structure for reducing the difficulty of high-altitude construction according to claim 2, characterized in that, A first sling is installed on the outer side of the connecting transition floor slab. The other end of the first sling is connected to the tubular truss, and the end of the first sling is connected to the anchor rod A embedded in the connecting transition floor slab.

4. The steel truss cantilever structure for reducing the difficulty of high-altitude construction according to claim 3, characterized in that, A second sling is installed on the outer wall of the structural wall. The second sling is located below the tubular truss, and its end away from the structural wall is fixed to the tail end of the tubular truss. One end of the second sling is connected to the anchor B embedded in the structural wall.

5. The steel truss cantilever structure for reducing the difficulty of high-altitude construction according to claim 4, characterized in that, The lower surface of the external concrete beam of the wall is provided with an upper main lifting lug, and the pipe truss is provided with a lower main lifting lug that cooperates with the upper main lifting lug. The upper main lifting lug and the lower main lifting lug are hingedly connected by a main connecting pin.

6. The steel truss cantilever structure for reducing the difficulty of high-altitude construction according to claim 5, characterized in that, The lifting rod A includes an upper insert pipe welded to the first weighing lifting beam and a lower insert pipe welded to the tubular truss. The other ends of the upper and lower insert pipes are respectively inserted into the two ends of the middle sleeve and welded to the middle sleeve. The lifting rod A has the same structure as the lifting rod B.

7. The construction method for a steel truss cantilever structure that reduces the difficulty of high-altitude construction according to claim 6, characterized in that, Includes the following steps, S1, using concrete and steel bars to prefabricate a connecting transition floor slab with an external concrete beam in the factory, and pre-embed a seat B connected to the first sling on the connecting transition floor slab, and pre-embed an upper hinge seat A, a lower hinge seat B, an upper hinge seat B, a lower hinge seat D and an upper main lifting lug on the external concrete beam. S2, Construct the structural wall using concrete and steel bars at the construction site, and connect the prefabricated components from step S1 to the structural wall using a crane at the construction site. S3, install front and rear diagonal bracing on the concrete beam outside the wall, and weld inserts on the front and rear diagonal bracing. S4, the tubular truss is prefabricated in the factory, and the lower insert is welded onto the tubular truss, and the middle sleeve is fitted onto the lower insert. S5, use a crane to lift the tubular truss so that the upper main lifting lug and the lower main lifting lug fit together; S6, the lower main lifting lug and the upper main lifting lug are connected by the main connecting pin, and then the tube truss is connected to the tail wall connecting seat on the structural wall; S7. After aligning the lower insertion tube with the upper insertion tube, raise the position of the middle sleeve so that the upper and lower ends of the middle sleeve are respectively inserted with the upper insertion tube and the lower insertion tube. Then, use a welding machine to weld the upper insertion tube and the lower insertion tube to the middle sleeve respectively. S8, fix the second sling and the first sling in the installation position respectively.

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