Section steel cantilever frame same-layer cantilever structure

Abstract

The utility model relates to a section steel cantilever frame same-layer cantilever structure which comprises a cantilever main beam and a cable bent tower which are fixedly arranged on a lower-layer top plate, the cantilever main beam is anchored on the lower-layer top plate through a cantilever main beam pressing ring, the cable bent tower is fixed on the lower-layer top plate, one side of the top of the cable bent tower is connected with the cantilever end of the cantilever main beam through a first inhaul cable, and the other side of the top of the cable bent tower is connected with a second inhaul cable. The other side of the top is connected with a pressing ring embedded part embedded in the lower-layer top plate through a second inhaul cable; and a cantilever end formwork support is arranged at the top of the cantilever end of the cantilever main beam. The structure is reasonable in stress, low in cost and small in operation difficulty, solves the problem that the rigidity of the cantilever main beam is insufficient through the inhaul cable, can effectively reduce down-warping of the main beam, can achieve one-time construction of the cantilever section, avoids reserving construction seams, and improves the safety and durability of the structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction, and in particular relates to a same-layer cantilever structure of a section steel cantilever frame. Background Art

[0002] With the acceleration of urbanization, the number of office buildings in cities is increasing, placing higher demands on the scaffolding structures used in office building construction. Office buildings are typically designed with three-story podiums on three sides, but one side is left without a podium. Starting from the fifth floor, the main building is designed with a circular arc-shaped cantilevered structure. During construction, when the main structure reached the fourth floor, the arc-shaped cantilevered 2.25 meters on one side of the fifth-story structure, which lacked a podium and was also high above the base, presented construction difficulties.

[0003] At present, there are several construction methods for arc cantilevered shapes in the existing technology:

[0004] First, construct the non-cantilever structure first. After the beam strength at the 3rd axis of the fourth-floor top plate (i.e., the fifth-floor structure) is reached, erect the cantilever structure and construct the arc cantilever shape at the fifth-floor structure. However, this solution will cause the cantilever structure to be constructed later, and there will be hidden dangers in the quality of the construction joint and the problem of leaving steel bars for protection.

[0005] The second option involved installing steel legs on the second floor, attaching tie beams to the frame columns, and installing steel cantilever beams on the third floor, using the second-floor lower support beams to unload the cantilever ends. However, this solution required subcontracting the steel structure components and pre-embedded connectors in the lower structure, resulting in high overall costs and a long implementation period.

[0006] The third option is to erect a cantilever frame on the third-story structural slab and utilize the fourth-story structural beams for unloading. However, this solution requires erecting a formwork frame over 10 meters high on the cantilever frame, which requires expert review, a long review period, and high costs. Furthermore, this approach requires the formwork frame to be too high, weighing more than the cast-in-place structure, and requiring larger cantilever steel beams. Utility Model Content

[0007] In response to the shortcomings of the existing technology, the utility model provides a same-layer cantilever structure of a steel cantilever frame. The structure has reasonable force, low cost, and low operation difficulty. The problem of insufficient rigidity of the cantilever main beam is solved by using cables, which can effectively reduce the deflection of the main beam and realize one-time construction of the cantilever section, avoiding the establishment of construction joints and improving the structural safety and durability.

[0008] In order to achieve the above object, the technical solution of the utility model is:

[0009] A same-layer cantilever structure of a steel cantilever frame comprises a cantilever main beam fixed on the lower roof plate and a cable tower, wherein the cantilever main beam is anchored on the lower roof plate through a cantilever main beam pressure ring, and the cable tower is fixed on the lower roof plate, with one side of its top connected to the cantilever end of the cantilever main beam through a first cable, and the other side of its top connected to the pressure ring embedded part buried in the lower roof plate through a second cable; a cantilever end support formwork is provided on the top of the cantilever end of the cantilever main beam.

[0010] Preferably, the cable tower is a frame constructed of a disc-shaped frame or steel sections.

[0011] Preferably, one end of each of the first cable and the second cable is provided with a tightener for tensioning the cable.

[0012] Preferably, an attached lifting scaffold is further provided on the cantilever end of the cantilever main beam, and the attached lifting scaffold is located outside the cantilever end formwork frame.

[0013] Preferably, the attached lifting scaffold is fixedly connected to the cantilevered section of the structural layer to be constructed via a fixing frame.

[0014] Preferably, a monitoring device for monitoring cable stress is provided on the top of the tower.

[0015] Technical effects and advantages of this utility model:

[0016] The utility model provides a same-layer cantilever structure of a steel cantilever frame. By arranging a combined structure of cable towers, cables and pressure ring embedded parts, the cantilever main beam is tied by the cables, thereby solving the problem of insufficient rigidity of the cantilever main beam, reducing the deflection of the main beam and realizing one-time construction of the cantilever section, avoiding the need for construction joints, improving structural safety and durability, and saving materials and shortening construction period compared with other support methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the present utility model.

[0018] Numbers in the figure: 1. Cantilever main beam; 2. Cable tower; 3. Cantilever main beam compression ring; 4. First cable; 5. Second cable; 6. Compression ring embedded parts; 7. Cantilever end formwork; 8. Attached lifting scaffolding; 9. Fixed frame. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the embodiments given in the accompanying drawings.

[0020] See also Figure 1As shown, a same-layer cantilever structure of a steel cantilever frame comprises a cantilever main beam 1 and a cable tower 2 fixed on the lower roof plate. The cantilever main beam 1 is anchored on the lower roof plate through a cantilever main beam pressure ring 3. The cable tower 2 is fixed on the lower roof plate, and one side of its top is connected to the cantilever end of the cantilever main beam 1 through a first cable 4, and the other side of the top is connected to the pressure ring embedded part 6 buried in the lower roof plate through a second cable 5; a cantilever end support formwork 7 is provided on the top of the cantilever end of the cantilever main beam 1.

[0021] In one embodiment, the cable tower 2 is a frame constructed by a disc frame or steel sections. By using the disc frame or steel sections to construct the cable tower 2, the cable tower 2 is easy and quick to build, with low construction cost, which greatly saves construction costs.

[0022] In one embodiment, one end of each of the first cable 4 and the second cable 5 is provided with a tightener for tightening the cables, and the tension of the cables can be adjusted according to the construction environment through the tightener.

[0023] In one embodiment, an attached lifting scaffolding 8 is further provided on the cantilever end of the cantilever main beam 1. The attached lifting scaffolding 8 is located on the outside of the cantilever end formwork frame 7. In order to improve the firmness of the attached lifting scaffolding 8, the attached lifting scaffolding 8 is fixedly connected to the cantilever section of the structural layer to be constructed through a fixed frame 9.

[0024] In one embodiment, a monitoring device for monitoring cable stress is provided on the top of the cable tower 2. The monitoring device is connected to the control terminal, thereby monitoring the cable stress in real time to ensure construction safety.

[0025] This embodiment provides a combined structure of a cable tower 2, a cable and a compression ring embedded part 6, and fastens the cantilever main beam 1 through the cable 2, thereby solving the problem of insufficient rigidity of the cantilever main beam 1, reducing the deflection of the main beam, and realizing one-time construction of the cantilever section, avoiding the need for construction joints, improving structural safety and durability, and saving materials and shortening construction period compared with other support methods.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A same-layer cantilever structure of a steel cantilever frame, characterized by: The invention comprises a cantilever main beam (1) fixed on the lower roof plate and a cable tower (2), wherein the cantilever main beam (1) is anchored on the lower roof plate through a cantilever main beam pressure ring (3), and the cable tower (2) is fixed on the lower roof plate, with one side of the top thereof being connected to the cantilever end of the cantilever main beam (1) through a first cable (4), and the other side of the top being connected to a pressure ring embedded part (6) buried in the lower roof plate through a second cable (5); a cantilever end support formwork frame (7) is provided on the top of the cantilever end of the cantilever main beam (1).

2. The same-layer cantilever structure of a steel cantilever frame according to claim 1, characterized in that: The cable tower (2) is a frame constructed of a buckle frame or section steel.

3. The same-layer cantilever structure of a section steel cantilever frame according to claim 1, characterized in that: One end of each of the first cable (4) and the second cable (5) is provided with a tightener for tensioning the cables.

4. The same-level cantilever structure of a section steel cantilever frame according to claim 1, characterized in that: An attached lifting scaffold (8) is also provided on the cantilever end of the cantilever main beam (1), and the attached lifting scaffold (8) is located outside the cantilever end formwork frame (7).

5. The same-layer cantilever structure of a section steel cantilever frame according to claim 4, characterized in that: The attached lifting scaffold (8) is fixedly connected to the cantilevered section of the structural layer to be constructed via a fixing frame (9).

6. The same-level cantilever structure of a section steel cantilever frame according to claim 1, characterized in that: A monitoring device for monitoring cable stress is provided on the top of the cable tower (2).

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