Reinforcing steel bar pre-embedding construction method for connecting core tube with floor support plate of super high-rise building

Abstract

The invention provides a steel bar pre-embedding construction method for a core tube connecting floor support plate of a super high-rise building, which relates to the technical field of floor support plate construction and comprises the steps of construction preparation, core tube outer wall aluminum mold installation, cantilever plate aluminum mold installation, template reinforcement, floor support plate connecting steel bar installation, concrete pouring, cantilever plate concrete chiseling and removing and the like. The method has the characteristics of simple and practical operation, stability, reliability and high safety.

Description

Technical Field

[0001] The invention relates to the technical field of floor deck construction, in particular to a method for pre-embedding steel bars for connecting a core tube of a super high-rise building to a floor deck. Background Art

[0002] With the increasing development of urban socioeconomics, newly constructed commercial complexes have become popular leisure, entertainment, and residential destinations for modern residents. Super-high-rise office buildings are growing taller and taller, and most utilize steel-frame core tube structures, offering novel and unique designs and diverse forms. The steel frame floor deck and core tube concrete structure are typically constructed asynchronously and at different intervals. Hydraulic climbing formwork is often used as an external scaffolding for the core tube concrete structure, rising as the core tube rises. Because the floor deck is constructed later, the steel reinforcement connecting the core tube and the core tube must be pre-buried in the exterior wall.

[0003] Traditional pre-embedded reinforcement methods leave excessively long straight rebar, hindering the hydraulic climbing formwork from lifting and causing uneven bottoms on the outer formwork of the core tube's exterior walls, leading to potential grout leakage and misalignment, increasing repair costs. Traditional planted rebar methods also result in high costs due to the large number of rebar units, densely packed exterior wall reinforcement, poor planted rebar quality, and a high probability of failing third-party inspections. Solving the challenges of pre-embedded rebar construction for connecting the core tube to the floor deck in super-high-rise office buildings is a technical topic worthy of research. Summary of the Invention

[0004] In response to the above-mentioned existing technologies, the present invention proposes a method for pre-embedded steel bars for connecting the core tube of a super-high-rise building to the floor decking, aiming to solve the problem in the construction of the outer wall of the core tube of a super-high-rise building that the traditional method of pre-embedded steel bars hinders the lifting of the hydraulic climbing formwork, easily causes the bottom of the outer wall formwork to be uneven, leaks mortar and misaligned, and increases the cost of subsequent repairs.

[0005] The present invention provides a method for pre-embedded steel bars for connecting a core tube of a super high-rise building to a floor deck, comprising the following steps: S1. Construction preparation: Determine the cantilever panels to be added to the core tube exterior wall according to the design drawings; use software to create a 3D model and deepen the aluminum formwork drawings for the core tube exterior wall and cantilever panels; process, produce, assemble, and transport the aluminum formwork; S2. Installation of the core tube exterior wall aluminum formwork: Install the main reinforcement, distribution reinforcement, and tension reinforcement of the core tube exterior wall. Assemble the standard wall formwork, connecting plate, and C-groove of the core tube exterior wall into the core tube exterior wall aluminum formwork. Use a climbing formwork electric hoist to lift the assembled core tube exterior wall aluminum formwork to the exterior wall edge. Install tension screws to connect the inner and outer core tube exterior wall aluminum formworks. S3. Installation of cantilever slab aluminum formwork: Install the vertical poles, early removal heads, floor slab aluminum formwork and the cantilever slab aluminum formwork on the outer side of the core tube exterior wall; S4. Formwork reinforcement: Install vertical back ribs to reinforce the core tube exterior wall aluminum formwork and cantilever plate aluminum formwork, and install diagonal braces on the lower side of the core tube exterior wall aluminum formwork for reinforcement; S5. Installation of floor deck connection steel bars: Install the floor slab steel bars and the floor deck connection steel bars in the cantilever slab. Set up a double layer of floor deck connection steel bars, and place lightweight insulation boards between the double layer of floor deck connection steel bars. S6. Concrete pouring: pour the core tube exterior wall concrete and cantilever slab concrete in layers and sections; S7. Chiseling out the cantilever slab concrete: After the concrete reaches the required strength, remove the aluminum formwork and transfer it to other floors for use; chisel out the cantilever slab concrete and lightweight insulation board, and straighten the connecting steel bars of the floor deck.

[0006] Preferably, in S1, the cross-sectional dimensions of the cantilever plate are 100 mm thick and 100 mm wide.

[0007] Preferably, in S2, an 8 mm construction adjustment joint is reserved at the bottom of the aluminum formwork on the inner side of the core tube outer wall, which is subsequently sealed with cement mortar.

[0008] Preferably, in S4, the length of the top vertical back rib of the outer aluminum formwork of the core tube outer wall is 2000mm, and the length of the bottom vertical back rib of the inner aluminum formwork is 3600mm. The vertical back rib is fixed to the aluminum formwork of the core tube outer wall by tension screws, and the spacing between the tension screws is 650mm.

[0009] Preferably, in S4, two diagonal braces are installed on the inner aluminum formwork of the core tube outer wall, with lengths of 1400mm and 2800mm respectively. The diagonal braces are arranged at intervals of 1600mm along the length direction of the core tube outer wall. The top of the diagonal brace is fixed to the vertical back rib, and the bottom is fixed to the floor through the base.

[0010] Preferably, in S5, the length of the floor deck connecting steel bars left inside the cantilever plate and the outer wall of the core tube is La, and the floor deck connecting steel bars are bent into a seven-shaped shape and laid flat inside the cantilever plate.

[0011] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention provides a method for pre-embedded steel bars for connecting the core tube of a super high-rise building to the floor decking, which can safely and efficiently reserve pre-embedded floor decking connection steel bars by making temporary cantilevered narrow plates without affecting the lifting of the hydraulic climbing formwork, thereby ensuring the appearance quality of the core tube exterior wall and the safety of the main structure.

[0012] The steel bar pre-embedded construction method provided by the present invention can be used for the connection construction between the core tube and the floor deck of a super high-rise office building; the method is simple and practical to operate, stable and reliable, highly safe, does not affect the lifting of the hydraulic climbing formwork, ensures the appearance quality of the core tube outer wall and the safety of the main structure, shortens the construction period, saves the subsequent steel bar planting and repair costs, ensures the safety of high-altitude operations, has good environmental protection, meets the requirements of green construction, and is highly economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1Schematic diagram of the construction method for pre-embedded steel bars connecting the core tube of a super high-rise building to the floor deck in an embodiment of the present invention.

[0014] Figure 2 Schematic diagram of the installation of connecting steel bars for floor decking in an embodiment of the present invention.

[0015] In the figure: 1. Core tube exterior wall; 2. Cantilever slab; 3. Construction adjustment joint; 4. Floor slab aluminum formwork; 5. Diagonal brace; 6. Floor deck connecting steel bar; 7. Tension screw; 8. Floor deck. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments.

[0017] Example: Figure 1 、 2 The method for pre-embedded reinforcement for connecting the core tube of a super high-rise building to the floor deck is shown, comprising the following steps: S1. Construction preparation: According to the design drawings, determine the cantilever plate 2 to be added to the core tube exterior wall 1; use SketchUp and PKPM software to build a three-dimensional model, and deepen the aluminum formwork drawings of the core tube exterior wall 1 and the cantilever plate 2; process and produce the aluminum formwork, match the formwork and transport it; the cross-sectional dimensions of the cantilever plate 2 are 100mm thick and 100mm wide, and it is a temporary structure. After the next layer of the core tube exterior wall is cast and the climbing formwork is lifted, it will be removed when the floor decking 8 is laid.

[0018] S2. Installation of the core tube exterior wall aluminum formwork: Install the main reinforcement, distribution reinforcement and tension reinforcement of the core tube exterior wall 1, assemble the standard wall formwork, high-rise plate and C-groove of the core tube exterior wall 1 into the core tube exterior wall aluminum formwork through pins and pins, lift the assembled core tube exterior wall aluminum formwork to the exterior wall edge with a climbing formwork electric hoist, install the tension screw 7 to connect the inner and outer core tube exterior wall aluminum formworks; reserve an 8mm construction adjustment joint 3 at the bottom of the inner aluminum formwork of the core tube exterior wall, and seal it with cement mortar later.

[0019] S3. Installation of cantilever slab aluminum formwork: Install the vertical poles, early removal heads, floor slab aluminum formwork 4 and the cantilever slab aluminum formwork on the outside of the core tube outer wall 1.

[0020] S4. Formwork reinforcement: Install vertical back ribs to reinforce the core tube exterior wall aluminum formwork and cantilever plate aluminum formwork, and install diagonal braces 5 on the lower side of the core tube exterior wall aluminum formwork for reinforcement; the vertical back rib of the top of the core tube exterior wall aluminum formwork is 2000mm long, and the vertical back rib of the bottom of the inner aluminum formwork is 3600mm long. The vertical back ribs are fixed to the core tube exterior wall aluminum formwork by tension screws 7, and the spacing between the tension screws 7 is 650mm; two diagonal braces 5 are installed on the inner aluminum formwork of the core tube exterior wall 1, with lengths of 1400mm and 2800mm respectively. The diagonal braces 5 are arranged at intervals of 1600mm along the length direction of the core tube exterior wall, the top of the diagonal brace 5 is fixed to the vertical back rib, and the bottom is fixed to the floor slab through the base.

[0021] S5. Installation of floor deck connecting steel bars: Install floor slab steel bars and floor deck connecting steel bars 6 in the cantilever slab 2. The floor deck connecting steel bars 6 are double-layered. To reduce the difficulty of later dismantling of the cantilever slab 2, 50mm thick lightweight insulation boards are placed between the double-layered floor deck connecting steel bars 6. The length of the floor deck connecting steel bars 6 left inside the cantilever slab 2 and the core tube outer wall 1 is La. Since the cantilever slab 2 is narrow, the floor deck connecting steel bars 6 are bent into a seven-shaped shape and flattened into the cantilever slab 2 to ensure that the surface of the cantilever slab 2 is smooth and does not affect the installation of the aluminum formwork of the next layer of the core tube outer wall.

[0022] S6. Concrete pouring: pour the core tube exterior wall concrete and cantilever slab concrete in layers and sections.

[0023] S7. Chiseling out the cantilever slab concrete: After the concrete reaches the required strength, remove the aluminum formwork and transfer it to other floors for use; chisel out the cantilever slab concrete and lightweight insulation board, and straighten the floor slab connecting steel bars 6.

[0024] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent solutions made using the contents of the present invention specification, directly or indirectly applied in other related technical fields, are also within the patent protection scope of the present invention.

Claims

1. A method for pre-embedded steel bars for connecting the core tube of a super high-rise building to the floor deck, characterized in that: The steps include: S1. Construction preparation: Determine the cantilever panels to be added to the core tube exterior wall according to the design drawings; use software to create a 3D model and deepen the aluminum formwork drawings for the core tube exterior wall and cantilever panels; process, produce, assemble, and transport the aluminum formwork; S2. Installation of the core tube exterior wall aluminum formwork: Install the main reinforcement, distribution reinforcement, and tension reinforcement of the core tube exterior wall. Assemble the standard wall formwork, connecting plate, and C-groove of the core tube exterior wall into the core tube exterior wall aluminum formwork. Use a climbing formwork electric hoist to lift the assembled core tube exterior wall aluminum formwork to the exterior wall edge. Install tension screws to connect the inner and outer core tube exterior wall aluminum formworks. S3. Installation of cantilever slab aluminum formwork: Install the vertical poles, early removal heads, floor slab aluminum formwork and the cantilever slab aluminum formwork on the outer side of the core tube exterior wall; S4. Formwork reinforcement: Install vertical back ribs to reinforce the core tube exterior wall aluminum formwork and cantilever plate aluminum formwork, and install diagonal braces on the lower side of the core tube exterior wall aluminum formwork for reinforcement; S5. Installation of floor deck connection steel bars: Install the floor slab steel bars and the floor deck connection steel bars in the cantilever slab. Set up a double layer of floor deck connection steel bars, and place lightweight insulation boards between the double layer of floor deck connection steel bars. S6. Concrete pouring: pour the core tube exterior wall concrete and cantilever slab concrete in layers and sections; S7. Chiseling out the cantilever slab concrete: After the concrete reaches the required strength, remove the aluminum formwork and transfer it to other floors for use; chisel out the cantilever slab concrete and lightweight insulation board, and straighten the connecting steel bars of the floor deck.

2. The method for pre-embedding steel bars for connecting the core tube of a super high-rise building to the floor deck as claimed in claim 1, characterized in that: In S1, the cross-sectional dimensions of the cantilever plate are 100 mm thick and 100 mm wide.

3. The method for pre-embedding steel bars for connecting the core tube of a super high-rise building to the floor deck according to claim 1 or 2, characterized in that: In S2, an 8mm construction adjustment joint is reserved at the bottom of the aluminum formwork on the inner side of the core tube outer wall, which is subsequently sealed with cement mortar.

4. The method for pre-embedding steel bars for connecting the core tube of a super high-rise building to the floor deck according to claim 1 or 2, characterized in that: In S4, the length of the vertical back rib at the top of the outer aluminum formwork of the core tube outer wall is 2000mm, and the length of the vertical back rib at the bottom of the inner aluminum formwork is 3600mm. The vertical back rib is fixed to the aluminum formwork of the core tube outer wall by tension screws, and the spacing between the tension screws is 650mm.

5. The method for pre-embedding steel bars for connecting the core tube of a super high-rise building to the floor deck according to claim 1 or 2, characterized in that: In S4, two diagonal braces are installed on the inner aluminum formwork of the core tube outer wall, with lengths of 1400mm and 2800mm respectively. The diagonal braces are arranged at intervals of 1600mm along the length of the core tube outer wall. The top of the diagonal brace is fixed to the vertical back rib, and the bottom is fixed to the floor slab through the base.

6. The method for pre-embedding steel bars for connecting the core tube of a super high-rise building to the floor deck according to claim 1 or 2, characterized in that: In S5, the length of the floor deck connecting steel bars left inside the cantilever slab and the outer wall of the core tube is La, and the floor deck connecting steel bars are bent into a seven-shaped shape and laid flat inside the cantilever slab.

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