Construction method for rapid start of super high-rise building ground structure

Abstract

The application relates to a rapid starting construction method for super-high building ground structures, which comprises the following steps: firstly, after the zero elevation of the first floor ground is determined, the outer frame and the core tube are simultaneously constructed; when the outer frame and the core tube are simultaneously constructed to the third floor, a pre-pouring platform is poured outside the core tube; after the pouring is completed, the core tube is continuously constructed, and the floor slab of the third floor of the outer frame is poured; after the core tube is constructed to the fifth floor, the vertical structure of the core tube is constructed; finally, after the core tube and the outer frame are separated by a certain number of layers, the horizontal structure of the outer frame and the horizontal structure of the core tube are constructed. According to the principle that the core tube is constructed first, the steel structure frame is constructed second, and the horizontal structure is constructed last, the problem of rapid starting construction of the ground structure is effectively solved, the rapid starting of the core tube is realized, the installation of the climbing formwork frame is realized in advance, the construction period is shortened compared with the traditional construction method, and the phenomenon of the outer frame being idle is reduced to a certain extent.

Description

Technical Field

[0001] This invention relates to a method for rapid commencement of construction of the above-ground structure of a super high-rise building, belonging to the technical field of construction commencement. Background Technology

[0002] With societal development, the construction industry in various regions is growing rapidly, resulting in increasingly larger and taller buildings. According to China's "General Code for Design of Civil Buildings" (GB 50352—2005), residential buildings are classified by the number of floors: one to three floors are low-rise residential buildings, four to six floors are multi-story residential buildings, seven to nine floors are mid-rise residential buildings, and ten floors and above are high-rise residential buildings. Civil buildings other than residential buildings with a height not exceeding 24 meters are classified as single-story or multi-story buildings; those exceeding 24 meters are high-rise buildings (excluding single-story public buildings exceeding 24 meters in height); and civil buildings exceeding 100 meters in height are super high-rise buildings.

[0003] In the initial construction of super high-rise buildings, the core tube and outer frame are typically constructed simultaneously up to the third floor. However, scaffolding can only be erected on the outer frame's horizontal structure after the third floor's horizontal structure has been poured, followed by the construction of the core tube's vertical structure. Furthermore, the climbing formwork is installed only after the core tube has been poured to the predetermined number of floors. Finally, the steel frame and the outer frame's horizontal structure are constructed only after the core tube and outer frame have been separated by several floors. The drawback of this method is that the core tube's construction cannot proceed until the third floor of the outer frame's horizontal structure is completed, slowing down the initial construction speed and affecting the installation progress of the climbing formwork, thus impacting the overall project schedule. Additionally, the need to halt construction after the third floor of the outer frame is poured while the core tube reaches the predetermined number of floors for the climbing formwork installation can lead to prolonged downtime on the outer frame, resulting in low overall construction efficiency. Therefore, there is an urgent need for a method that can enable rapid commencement of construction of the above-ground structure of super high-rise buildings. Summary of the Invention

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] To address the problems and shortcomings of existing technologies, this invention aims to provide a rapid construction method for the above-ground structure of super high-rise buildings, including but not limited to the core tube, outer frame, pre-cast platform, climbing formwork, scaffolding, first mezzanine area, second mezzanine area, and third mezzanine area. Through optimized design, a three-dimensional, cross-operation mode is achieved on the construction site. By following the principle of core tube construction first, followed by steel frame construction, and then horizontal structure construction, the "idle work" phenomenon of the outer frame on site can be reduced, thereby improving overall construction efficiency. This solves the problems mentioned in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a rapid start-up construction method for the above-ground structure of a super high-rise building, including a core tube and an outer frame. The rapid start-up construction method includes the following steps.

[0008] Step 1: After the main project is completed below the reference plane and the ground floor reaches the zero elevation, the outer frame and core tube are constructed simultaneously.

[0009] Step 2: After the outer frame and core tube are constructed simultaneously to the third layer slab surface, a pre-cast platform is poured on the outside of the core tube.

[0010] Step 3: After the pre-cast platform is completed, the core tube is raised and the third layer of the outer frame is cast.

[0011] Step 4: After the core tube is lifted to the fifth floor, the vertical structure of the core tube is poured.

[0012] Step 5: After the core tube and the outer frame are separated by a certain number of layers, the construction of the horizontal structure of the outer frame and the horizontal structure of the core tube will be carried out.

[0013] Preferably, the second and third layers of the outer frame are mezzanine structures, which include a first mezzanine area, a second mezzanine area, and a third mezzanine area. A mezzanine structure is a floor between two natural floors, a partial level of the interior space, and is often used to house common equipment within the building. Here, the mezzanine structure is located between the second and third layers of the outer frame, and is distributed at the northwest corner, southwest corner, and east side of the core tube.

[0014] Preferably, during step 1, the first and third mezzanine areas are not constructed temporarily, while the second mezzanine area and the remaining outer frame areas are constructed synchronously with the core tube to the third layer. Simultaneous construction of the second mezzanine area along with the outer frame areas and the core tube serves as temporary material storage on site, which helps improve the construction environment and safety, effectively saves construction costs, shortens the project completion cycle, and improves work efficiency.

[0015] Preferably, during step 3, the first mezzanine area and the third mezzanine area are also constructed simultaneously up to the third layer.

[0016] Preferably, the width of the pre-cast platform poured outside the core tube is 3 meters. Within the outer frame area, the pre-cast platform is poured around the outer perimeter of the core tube. Setting the width of this pre-cast platform to 3 meters allows it to serve as a platform for erecting scaffolding outside the core tube, facilitating the movement of construction workers.

[0017] Preferably, in step 4, after the fifth layer of the vertical structure of the core tube has been poured, the climbing formwork is installed, and the steel frame structure is constructed simultaneously using the climbing formwork. The climbing formwork has self-climbing capability and does not require lifting machinery. The verticality and flatness of the climbing formwork technology are easy to adjust and control, thus avoiding the accumulation of construction errors. Furthermore, the climbing formwork process is not only fast and economical, but also effectively ensures the quality of construction.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention provides a rapid construction method for the above-ground structure of a super high-rise building, including but not limited to the core tube, outer frame, pre-cast platform, climbing formwork, scaffolding, and mezzanine structure. The specific construction method involves first completing construction below the main structure's reference plane and reaching the zero elevation of the first floor. Then, the outer frame and core tube are constructed simultaneously. Once the outer frame and core tube have been constructed to the third floor slab surface, a pre-cast platform is poured outside the core tube for scaffolding erection. After the pre-cast platform is completed, the core tube continues to be raised, and the third floor slab surface of the outer frame is poured. After the core tube is raised to the fifth floor, its vertical structure is poured. Finally, once the core tube and outer frame are separated by a certain number of floors, the horizontal structure of the outer frame and the horizontal structure of the core tube are constructed. During construction, an optimized design enables a three-dimensional, cross-operation mode on the construction site, following the principle of core tube first, then steel frame, and finally horizontal structure. Within the core tube, the vertical structure is constructed first, followed by the horizontal structure. It effectively solves the problem of rapid construction of the above-ground structure, enabling both rapid start-up of the core tube and early installation of the climbing formwork. Compared with traditional construction methods, it can shorten the construction period and reduce the phenomenon of "idle work" in the outer frame to a certain extent. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0021] In the attached diagram:

[0022] Figure 1 This is a top view of the connection structure of the main building structure in an embodiment of the present invention.

[0023] The diagram is marked as follows: 1. First mezzanine area; 2. Second mezzanine area; 3. Third mezzanine area; 4. Outer frame; 5. Core tube; 6. Precast platform; 7. Scaffolding. Detailed Implementation

[0024] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0025] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. Example

[0026] This embodiment provides a method for rapid commencement of construction of the above-ground structure of a super high-rise building, referring to... Figure 1 As shown, the structure includes, but is not limited to, the core tube 5, the outer frame 4, the precast platform 6, the climbing formwork, the scaffolding 7, the first mezzanine area 1, the second mezzanine area 2, and the third mezzanine area 3. The second and third floors above ground of the outer frame 4 constitute the mezzanine areas, and horizontal structures are only present at the northwest, southwest, and east corners of the core tube 5. Specifically, the first mezzanine area 1 is located at the northwest corner of the core tube 5, the second mezzanine area 2 is located at the southwest corner of the core tube 5, and the third mezzanine area 3 is located on the right side of the core tube 5.

[0027] This embodiment provides a rapid construction method for the above-ground structure of a super high-rise building, which specifically includes the following steps:

[0028] Step 1: After the main structure is completed below the reference plane and the ground floor reaches the zero elevation, the outer frame and core tube are constructed simultaneously.

[0029] Step 2: After the outer frame and core tube are constructed simultaneously to the third floor slab surface, a pre-cast platform is poured on the outside of the core tube.

[0030] Step 3: After the pre-cast platform is completed, continue to lift the core tube and cast the third layer of the outer frame.

[0031] Step 4: After the core tube is lifted to the fifth floor, the vertical structure of the core tube is poured.

[0032] Step 5: After the core tube and the outer frame are separated by a certain number of layers, the construction of the horizontal structure of the outer frame and the horizontal structure of the core tube will be carried out.

[0033] Super high-rise buildings are mostly designed with a frame-core tube structure. Public facilities, service rooms, staircases, and elevators are typically concentrated in the central area of ​​the floor plan, forming a core tube shared by multiple disciplines. Shear walls are placed around the perimeter and at the partition walls of the core tube, while connecting beams are installed at doorways, collectively forming a core tube structure with the structural characteristics of a tube structure.

[0034] The core tube is the central part of the building, enclosed by elevator shafts, staircases, ventilation shafts, cable shafts, public restrooms, and some equipment rooms. Together with the outer frame, it forms an outer frame-inner tube structure, constructed of reinforced concrete. This outer frame-inner tube structure is highly beneficial for structural stress and possesses excellent seismic resistance, making it a mainstream structural form widely adopted in super high-rise buildings. Furthermore, this structure offers advantages such as maximizing usable space, concentrating various auxiliary service spaces in the center of the floor plan, allowing main functional spaces to occupy optimal lighting positions, and achieving good views and convenient internal circulation. The lateral stiffness of the reinforced concrete core tube is far greater than that of the steel frame. As the number of floors increases, the proportion of horizontal loads acting on the building by the core tube increases. The steel frame mainly bears vertical loads and a small portion of horizontal loads; as the number of floors increases, the proportion of horizontal loads acting on the building by the steel frame decreases.

[0035] The building perimeter frame is the overall outline of the walls surrounding a building and their extensions. It includes the exterior walls of the building and the outer contours of other structural elements that may be connected to them, such as parapets, eaves, or gutters. In architectural calculations, the concept of the building perimeter frame describes the external boundary dimensions of a building, excluding internal spaces (such as elevator shafts, corridors, and entrance halls), helping to determine the building's physical boundaries and footprint.

[0036] Climbing formwork is an effective tool in high-rise buildings, including shear wall systems, tube systems, and bridge piers. Because the climbing formwork itself is self-climbing, it eliminates the need for lifting machinery, thus reducing the workload of transport equipment during construction. Furthermore, scaffolding suspended from the self-climbing formwork eliminates the need for external scaffolding during construction. Therefore, climbing formwork reduces the number of lifting machines required, speeds up construction, and results in better construction costs and economic benefits.

[0037] Scaffolding refers to the platform support erected on the construction site to facilitate workers' operations and solve vertical and horizontal transportation. It is used in places where construction cannot be carried out directly, such as exterior walls, interior decoration, or high-rise buildings. It is mainly used for construction workers to move up and down, for external safety netting, and for the installation of components at height.

[0038] A building mezzanine, also called a technical floor or equipment floor, is used to house dedicated pipelines and equipment. Buildings with mezzanines are typically high-rise buildings or certain large, shared multi-story buildings. These buildings are usually equipped with excellent shared facilities, such as central air conditioning and a central control room. They are highly intelligent and shared, thus requiring a large amount of equipment. The mezzanine is created for aesthetic and convenient placement of this shared equipment. A building mezzanine is a floor located between two natural floors, forming a partial level within the interior space of a building. For example, if a building appears to have two floors from the outside but three floors from the inside, the floor in the middle is called the building mezzanine.

[0039] Specifically, in step 1, the ground floor level of a typical building is generally set as ±0, read as zero. The zero-level elevation refers to the baseline during structural construction, specifically after the underground structure is completed. The zero-level elevation is essentially a reference surface; it sets the finished height of the first floor surface as the building's ±0, allowing the determination of the height of each floor. Once the zero-level elevation of the super high-rise building is reached, the outer frame 4, i.e., the core tube 5, is constructed simultaneously, while the first mezzanine area 1 and the third mezzanine area 3 are temporarily left unconstructed. This step reduces the amount of construction work on the outer frame 4, ensuring that the initial construction speed of the core tube 5 and the outer frame 4 is roughly the same, thus accelerating the initial construction speed of the above-ground structure. Furthermore, considering the difficulty of material storage on the construction site, the second mezzanine area 2 and the remaining areas of the outer frame 4 are also constructed simultaneously with the core tube 5 up to the third floor.

[0040] In step 2, after the core tube 5 and the outer frame 4 are constructed to the third floor slab level, the pre-cast platform 6 is constructed within the outer frame 4. Specifically, the pre-cast platform 6 is poured along the outside of the core tube 5. The function of the pre-cast platform 6 is to serve as a platform for erecting the scaffolding 7 on the outside of the core tube 5. The pre-cast platform 6 is set around the perimeter of the core tube 5, and its width is set to 3 meters. This step allows the subsequent lifting construction of the core tube 5 to proceed without waiting for the outer frame 4 to be completely poured. It also allows for the allocation of construction resources on the site towards the core tube 5, accelerating its construction and effectively saving construction time.

[0041] In step 3, after the pre-cast platform 6 is poured, construction continues to raise the core tube 5 to the fifth layer, while simultaneously constructing the first mezzanine area 1 and the third mezzanine area 3 up to the third floor slab. After the pre-cast platform 6 is poured, construction continues to raise the core tube 5 to the fifth layer, while simultaneously constructing the first mezzanine area 1 and the third mezzanine area 3 up to the third layer, and also pouring the third floor slab of the outer frame 4. The advantage of this step is that while the core tube 5 and the outer frame 4 are separated by layers, the construction of the outer frame 4 can continue unaffected, reducing the "idle work" phenomenon of the outer frame 4 to a certain extent.

[0042] In step 4, after the core tube 5 is raised to the fifth floor, its vertical structure is poured. Once the vertical structure is fully poured, the climbing formwork is installed, and the steel frame is constructed simultaneously. The core tube structure is a high-rise building structure mainly composed of vertical tubes that bear vertical and horizontal loads. The vertical components of the core tube include columns and shear walls. Using this step, after the vertical structure of the fifth floor of core tube 5 is poured, the climbing formwork is installed, and the four-story steel frame is constructed simultaneously using the climbing formwork. The climbing formwork further accelerates the construction speed, reduces construction costs, and improves economic benefits.

[0043] In step 5, after the construction of the core tube 5 and the outer frame 4 has been staggered by a certain number of layers, the horizontal structures of the outer frame 4 and the core tube 5 are constructed simultaneously. The horizontal structures mostly refer to the transverse beams of the core tube. Through this step, after the construction of the core tube 5 and the outer frame 4 has been staggered by a certain number of layers, the horizontal beams of the outer frame 4 and the core tube 5 are constructed simultaneously. This creates an intersecting structure between the core tube 5 and the outer frame 4, effectively solving the problem of rapid commencement of above-ground structure construction. This gradually forms a three-dimensional, cross-operation mode where the core tube is constructed first, followed by the steel frame structure, and then the horizontal structures.

[0044] Application of the Examples

[0045] This invention was successfully applied in the construction of the No. 3 and No. 4 super high-rise towers of the Hengli Suzhou Bay Phase VI project. The Hengli Suzhou Bay Phase VI project comprises two 62-story super high-rise research and office buildings, numbered 2-3 and 2-4, with a core tube-steel frame structure and a total building height of 268.35m. The second floor of the above-ground outer frame is a mezzanine structure, and the horizontal structural slabs exist only on the east, northwest, and southwest corners of the core tube; the remaining areas are cavities. The vertical structure construction of the core tube in this project adopted a climbing formwork process. The lower frame of the climbing formwork was installed after the fifth floor was poured, and the climbing formwork process was used to continue lifting from the sixth floor onwards.

[0046] During construction, an optimized design was used to achieve a three-dimensional, cross-operation mode on the construction site. The principle was to proceed with the core tube construction first, followed by the steel frame structure, and then the horizontal structures. Within the core tube, the vertical structure was constructed first, followed by the horizontal structure. In the initial stages of construction, the key to achieving this three-dimensional, cross-operation mode was: ① accelerating the start-up of the core tube, ② completing the installation of the core tube climbing formwork as early as possible, and ③ quickly establishing a separation between the core tube and the outer frame in terms of the number of stories. Applying this invention to this project effectively solved the problem of rapid start-up construction of the above-ground structure. It achieved both rapid start-up of the core tube and early installation of the climbing formwork, shortening the construction period by approximately 7 days compared to traditional methods and reducing the "idle work" phenomenon in the outer frame.

[0047] In the description of this invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0048] In addition to the embodiments described above, the present invention may have other implementations. Those skilled in the art can still modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features. 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.

Claims

1. A method for rapid commencement of construction of the above-ground structure of a super high-rise building, characterized in that: The rapid start-up construction method, including the core tube and the outer frame, comprises the following steps: Step 1: After the main project is completed below the reference plane and the ground floor reaches the zero elevation, the outer frame and core tube are constructed simultaneously. Step 2: After the outer frame and core tube are constructed simultaneously to the third layer slab surface, a pre-cast platform is poured on the outside of the core tube. The pre-cast platform is used to provide a foundation for the scaffolding on the outside of the core tube. Step 3: After the pre-cast platform is completed, the core tube is raised and the third layer of the outer frame is cast. Step 4: After the core tube is lifted to the fifth floor, the vertical structure of the core tube is poured. Step 5: After the core tube and the outer frame are separated by two layers, the construction of the horizontal structure of the outer frame and the horizontal structure of the core tube will be carried out. The second to third layers of the outer frame are mezzanine structures, which include a first mezzanine area, a second mezzanine area, and a third mezzanine area. In step 1, the first mezzanine area and the third mezzanine area are not constructed at the moment, while the second mezzanine area and the remaining outer frame areas are constructed synchronously with the core tube to the third layer. In step 3, the first mezzanine area and the third mezzanine area are also constructed synchronously to the third layer.

2. The construction method for rapid commencement of construction of the above-ground structure of a super high-rise building according to claim 1, characterized in that: The width of the precast platform poured on the outside of the core tube is 3 meters.

3. The construction method for rapid commencement of construction of the above-ground structure of a super high-rise building according to claim 2, characterized in that: When implementing step 4, after the fifth layer of the vertical structure of the core tube is poured, the climbing formwork is installed, and the steel frame structure is constructed simultaneously using the climbing formwork.

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