Bailey truss formwork platform mounting and dismounting method based on frame columns and steel stand columns

Abstract

The invention discloses a bailey truss formwork platform mounting and dismounting construction method based on frame columns and steel stand columns, which comprises the following steps: S1, surveying and setting out, and determining the mounting positions of the frame columns and the steel stand columns; s2, a frame column is installed, and a steel plate is embedded in the frame column in advance so that a steel corbel base can be installed subsequently; s3, steel stand columns are installed, an independent foundation is adopted, and stiffening plates are installed to enhance the structural stability and the bending resistance; s4, a bearing beam is installed on a steel corbel of the frame column, and grooving treatment is conducted on the top of the steel stand column so that the bearing beam can be clamped; and S5, the bailey truss is assembled, and the whole bailey truss is hoisted to the positions of the bearing beams on the frame columns and the steel stand columns. Through combination of the bailey truss, the frame columns and the steel stand columns, a stable and reliable supporting system is formed, large loads can be borne, construction safety is ensured, components can be rapidly assembled and disassembled through modular design and manufacturing, and construction efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a Bailey frame formwork platform installation and disassembly method based on frame columns and steel columns. Background Art

[0002] With the continuous advancement of construction technology and the diversification of architectural design, modern construction is placing increasing demands on support platforms. Traditional support platforms struggle to meet these demands in complex construction environments, such as high-altitude structures and large spans, and present problems such as low efficiency and high safety risks.

[0003] Therefore, it is particularly important to develop a stable, efficient and safe method for installing and dismantling the support platform. The Bailey frame formwork platform based on frame columns and steel columns came into being and effectively solved the above problems. Summary of the Invention

[0004] The present invention provides a Bailey frame formwork platform installation and disassembly method based on frame columns and steel columns to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: The Bailey frame formwork platform installation and disassembly method based on frame columns and steel columns includes the following steps: S1, measure and lay out, determine the installation positions of frame columns and steel columns; S2, install the frame columns and pre-embed steel plates inside the frame columns for subsequent installation of steel corbel bases; S3, install steel columns, adopt independent foundations and install stiffening plates to enhance structural stability and bending resistance; S4, install the load-bearing beam to the steel bracket of the frame column, and groove the top of the steel column to clamp the load-bearing beam; S5, assemble the Bailey frame and hoist it as a whole to the load-bearing beam position on the frame column and steel column; S6, install the distribution beam on the Bailey frame and set up the supporting formwork for concrete pouring; S7, after the concrete reaches the design strength, the Bailey frames and steel columns are removed in sequence.

[0006] As a further improvement of this technical solution: the Bailey frame adopts a modular design, and each component is reusable, specifically including Bailey plates and related accessories, and its assembly and disassembly process is completed by professional lifting equipment.

[0007] As a further improvement of this technical solution: the frame column and the steel corbel are connected by welding, and the steel corbel is fixed to the steel plate pre-buried inside the frame column to ensure stability and bearing capacity during construction.

[0008] As a further improvement of this technical solution: The bottom of the steel column adopts a C30-level concrete independent foundation and is installed with 6 stiffening plates. During the installation process, precise measurement and calibration are carried out to ensure that its verticality and stability meet the design standards.

[0009] As a further improvement of this technical solution: The connection between the bearing beam and the steel column is fixed by grooving treatment and welding of connecting plates to enhance the overall stability and safety of the structure.

[0010] As a further improvement of this technical solution: The removal process of the Bailey truss includes: first removing the connectors between the Bailey truss and the frame column and the steel column, and gradually pulling out and lifting the Bailey beam to the ground by using a crane and a winch.

[0011] As a further improvement of this technical solution: The removal process of the steel column includes: fixing the top of the steel column with a forklift, cutting the connection between the steel column and the foundation, and then transporting it outdoors by forklift to ensure the safety and stability of the removal process.

[0012] As a further improvement of this technical solution: The steel column is prepared from the following mass percentages: low-alloy high-strength steel matrix: 88 - 92%, vanadium: 0.05 - 0.12%, titanium: 0.02 - 0.06%, niobium: 0.03 - 0.08%, boron: 0.001 - 0.005%.

[0013] As a further improvement of this technical solution: The carbon content of the low-alloy high-strength steel matrix ≤ 0.2%.

[0014] As a further improvement of this technical solution: The preparation method of the steel column is as follows: First step, the low-alloy high-strength steel matrix, vanadium, titanium, niobium, and boron are added to an electric arc furnace in proportion and heated to 1600 - 1650 °C for complete melting; Second step, the continuous casting process adopts tundish metallurgy and is combined with submerged nozzle protection casting; Third step, when quenching, it is heated to 900 °C, held for 30 minutes, and cooled with a polyvinyl alcohol aqueous solution; when tempering, the temperature is 600 °C, held for 20 minutes, and air-cooled to room temperature; Fourth step, finally cut the steel column according to the design dimensions.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. By combining the Bailey truss with the frame column and the steel column, the present invention forms a stable and reliable support system, which can bear large loads, ensure construction safety, and the modular design and manufacturing enable the components to be quickly assembled and disassembled, greatly improving the construction efficiency, and the reuse of the components also reduces the construction cost.

[0016] 2. The present invention is applicable to construction environments of different types and heights, and can meet complex construction requirements such as high elevation and large span. 3. In the present invention, the steel column is the main load-bearing member. The composition of the steel column includes a low-alloy high-strength steel matrix, vanadium, titanium, niobium, and boron. Thus, the high-strength, high-toughness, and anti-fatigue synergistic performance of the steel column under vertical loads can be achieved, significantly enhancing its load-bearing capacity and long-term stability.

[0017] The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present invention and the accompanying drawings. The specific implementation manners of the present invention are given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings: Figure 1 is a schematic structural diagram of a Bailey truss formwork platform based on frame columns and steel columns proposed by the present invention; Figure 2 is a schematic structural diagram of a frame column and a steel corbel in the present invention; Figure 3 is a schematic structural diagram of a steel column and a reinforcing plate in the present invention; Figure 4 is a schematic structural diagram of a load-bearing beam, a frame column, and a steel column in the present invention; Figure 5 is a schematic structural diagram of a load-bearing beam and a Bailey truss in the present invention; Figure 6 is a schematic structural diagram of a clamping plate in the present invention.

[0019] In the drawings, the list of components represented by each reference numeral is as follows: 1. Frame column; 2. Load-bearing beam; 3. Reinforcing plate; 4. Steel column; 5. Steel corbel; 6. Bailey truss; 7. Distribution beam; 8. Clamping plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention. In the following paragraphs, the present invention is described more specifically by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use non-precise scales, only for conveniently and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0021] Please refer to Figures 1 to 6, in the embodiments of the present invention, the erection and demolition method of the Bailey truss 6 formwork platform based on the frame column 1 and the steel column 4 includes the following steps: S1, Measuring and setting out the lines to determine the installation positions of the frame column 1 and the steel column 4; S2, Installing the frame column 1, and pre-burying steel plates inside the frame column 1 for subsequent installation of the base of the steel bracket 5. The connection method between the frame column 1 and the steel bracket 5 is welding. The steel bracket 5 is fixed on the pre-buried steel plate inside the frame column 1 to ensure the stability and bearing capacity during the construction process; S3, Installing the steel column 4, using an independent foundation and installing stiffening plates to enhance the structural stability and flexural resistance. The bottom of the steel column 4 uses a C30-level concrete independent foundation and is equipped with 6 stiffening plates. During the installation process, precise measurement and calibration are carried out to ensure that its verticality and stability meet the design standards; S4, Installing the bearing beam 2 on the steel bracket 5 of the frame column 1, and grooving the top of the steel column 4 to clamp the bearing beam 2. The connection between the bearing beam 2 and the steel column 4 is fixed by grooving and adding connecting plates for welding to enhance the overall stability and safety of the structure; S5, Assembling the Bailey truss 6 and hoisting it as a whole to the position of the bearing beam 2 on the frame column 1 and the steel column 4. The Bailey truss 6 adopts a modular design, and each component can be reused, specifically including Bailey sheets and related accessories. Its assembly and disassembly process is completed by professional hoisting equipment; S6, Installing the distribution beam 7 on the Bailey truss 6 and erecting the support formwork for concrete pouring; S7, After the concrete reaches the design strength, the Bailey truss 6 and the steel column 4 are removed in sequence. The removal process of the Bailey truss 6 includes: first removing the connectors between the Bailey truss 6 and the frame column 1 and the steel column 4, and gradually pulling out and hoisting the Bailey beam to the ground by using a crane and a winch; the removal process of the steel column 4 includes: fixing the top of the steel column 4 with a forklift, cutting the connection between the steel column 4 and the foundation, and then transporting it outdoors by forklift to ensure the safety and stability of the removal process.

[0022] Among them, the steel column 4 is prepared from the following mass percentages: low-alloy high-strength steel matrix (carbon content ≤ 0.2%): 90%, vanadium: 0.08%, titanium: 0.04%, niobium: 0.05%, boron: 0.003%.

[0023] The steel column 4 is the main load-bearing member, composed of a low-alloy high-strength steel matrix, vanadium, titanium, niobium, and boron, which can achieve high-strength, high-toughness, and anti-fatigue synergistic performance of the steel column 4 under vertical loads, significantly improving its bearing capacity and long-term stability.

[0024] Among them, the composite addition of vanadium, titanium, and niobium pins the grain boundaries through nano-scale precipitation phases (VC, TiN, NbC), refining the grain size to 5-10 μm and increasing the yield strength of the steel column 4 by 20%-30%; at the same time, the boron element can promote the formation of acicular ferrite, making the steel column 4 present a multiphase structure under vertical loads, taking into account both strength and toughness.

[0025] The preparation method of the steel column 4 is as follows: In the first step, low-alloy high-strength steel matrix, vanadium, titanium, niobium, and boron are added to the electric arc furnace in proportion and heated to 1630 °C to be completely melted. In the second step, the continuous casting process adopts tundish metallurgy and is protected by submerged entry nozzles for casting. In the third step, when quenching, it is heated to 900 °C and held for 30 minutes, and cooled with an aqueous solution of polyvinyl alcohol; when tempering, the temperature is 600 °C, held for 20 minutes, and air-cooled to room temperature; in the fourth step, finally, the steel column 4 is cut according to the designed dimensions.

[0026] The yield strength of this steel column 4 is 620 (MPa), the tensile strength is 750 (MPa), and the impact toughness (-20 °C) is 68 J.

[0027] As mentioned above, it is only the preferred embodiment of the present invention and does not impose any formal restrictions on the present invention; any ordinary technician in this industry can smoothly implement the present invention according to what is shown in the accompanying drawings of the specification and what is described above; however, any equivalent changes such as slight modifications, decorations, and evolutions made by those familiar with this specialty within the scope of the technical solution of the present invention by using the technical content disclosed above are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications, and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. The erection and demolition method of the Bailey truss formwork platform based on frame columns and steel columns is characterized in that It includes the following steps: S1. Measuring and setting out the lines to determine the installation positions of the frame columns and steel columns; S2. Installing the frame columns and pre-burying steel plates inside the frame columns for subsequent installation of the steel bracket bases; S3. Installing the steel columns, using independent foundations and installing stiffening plates to enhance the structural stability and flexural resistance; S4. Installing the load-bearing beams on the steel brackets of the frame columns, and grooving the top of the steel columns to clamp the load-bearing beams; S5. Assembling the Bailey truss and hoisting it as a whole to the position of the load-bearing beams on the frame columns and steel columns; S6. Installing distribution beams on the Bailey truss and erecting support formworks for concrete pouring; S7. After the concrete reaches the designed strength, removing the Bailey truss and steel columns in sequence.

2. The erection and demolition method of the Bailey truss formwork support platform based on frame columns and steel columns according to claim 1, characterized in that, The Bailey truss adopts modular design, and each component can be reused. Specifically, it includes Bailey sheets and related fittings, and its assembly and disassembly processes are completed by professional hoisting equipment.

3. The erection and demolition method of the Bailey truss formwork support platform based on frame columns and steel columns according to claim 1 is characterized in that, The connection method between the frame column and the steel bracket is welding. The steel bracket is fixed on the steel plate pre-buried inside the frame column to ensure the stability and load-bearing capacity during the construction process.

4. The erection and demolition method of the Bailey truss formwork support platform based on frame columns and steel columns according to claim 1, characterized in that, The bottom of the steel column adopts a C30-level concrete independent foundation and is installed with 6 stiffening plates. Precise measurement and calibration are carried out during the installation process to ensure that its verticality and stability meet the design standards.

5. The erection and dismantling method of the Bailey truss formwork support platform based on frame columns and steel columns according to claim 1, characterized in that The connection between the load-bearing beam and the steel column is fixed by grooving and welding with a connecting plate to enhance the overall stability and safety of the structure.

6. The erection and demolition method of the Bailey truss formwork support platform based on frame columns and steel columns according to claim 1, characterized in that, The removal process of the Bailey truss includes: first removing the connectors between the Bailey truss and the frame column and steel column, and gradually pulling out and hoisting the Bailey beam to the ground by using a crane and a winch.

7. The erection and dismantling method of the Bailey truss formwork support platform based on frame columns and steel columns according to claim 1, characterized in that The removal process of the steel column includes: fixing the top of the steel column with a forklift, cutting the connection between the steel column and the foundation, and then transporting it outdoors by the forklift to ensure the safety and stability of the removal process.

8. The erection and demolition method of the Bailey truss formwork support platform based on frame columns and steel columns according to claim 1, characterized in that The steel column is prepared from the following mass percentages: low-alloy high-strength steel matrix: 88 - 92%, vanadium: 0.05 - 0.12%, titanium: 0.02 - 0.06%, niobium: 0.03 - 0.08%, boron: 0.001 - 0.005%.

9. According to the erection and demolition construction method of the Bailey truss formwork platform based on frame columns and steel columns described in claim 1, the carbon content of the low-alloy high-strength steel matrix ≤ 0.2%.

10. According to the erection and demolition construction method of the Bailey truss formwork platform based on frame columns and steel columns described in claim 1, the preparation method of the steel column is: The first step is to add the low-alloy high-strength steel matrix, vanadium, titanium, niobium, and boron into an electric arc furnace in proportion and heat up to 1600 - 1650°C for complete melting; The second step is that the continuous casting process adopts tundish metallurgy and is combined with submerged nozzle protection casting; The third step is to heat to 900°C during quenching, keep warm for 30 minutes, and cool with an aqueous solution of polyvinyl alcohol; during tempering, the temperature is 600°C, keep warm for 20 minutes, and air-cool to room temperature; The fourth step is to finally cut the steel column according to the designed dimensions.

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