Rapid installation method for roof beam of steel structure factory building

Abstract

The invention discloses a rapid installation method for a roof beam of a steel structure factory building, which comprises the following steps: ground lofting and preparation: lofting on the ground of a construction site according to the distance between axes of upright posts of the factory building, and planning an assembly area of at least two spans of roof beams; the roof beams are in place on the ground, specifically, at least two roof beams are hoisted to an assembly area, and after the roof beams are adjusted to design positions and elevations, the roof beams are fixed through temporary supports; integral ground assembling: mounting purlines, beam top supports and supporting components on the roof beams fixed on the ground, so that the roof beams and the connecting components are assembled on the ground to form a stable integral structure; and integral hoisting in place: hoisting the integral structure to the top of the factory building upright post with the designed elevation at one time and fixing the integral structure. Compared with the prior art, the method has the advantages that a risk operation mode of high-altitude component installation is converted into a construction mode of ground integral assembly and one-time hoisting, the operation is simple and convenient, the safety is high, and the installation quality and efficiency can be effectively guaranteed.

Description

Technical Field

[0001] This invention relates to the field of steel structure building construction technology, and in particular to a rapid installation method for roof beams of steel structure factory buildings. Background Technology

[0002] In the steel structure construction of large-span industrial plants, to optimize economic indicators, relatively thin steel plates are often used to make the upper and lower flanges of the roof beams, resulting in low lateral stiffness. In traditional construction, roof beams are usually hoisted single by single. For such thin-walled roof beams with insufficient lateral stiffness, single-frame hoisting has obvious drawbacks: First, during hoisting, the components are prone to twisting and swaying due to their weak stiffness, making it difficult to stabilize and control their posture, thus increasing the difficulty of hoisting; Second, after hoisting into place and releasing the hook, the top of the roof beam often exhibits a "tilting" phenomenon, that is, deviating from the designed vertical plane, making the subsequent installation of purlins, horizontal supports, and other components extremely difficult, often requiring high-risk high-altitude correction operations, which is not only inefficient but also significantly increases construction safety risks; Third, high-altitude component installation requires multiple hook-and-unhook operations with the crane, resulting in slow operation speed and a long construction period.

[0003] Therefore, there is an urgent need for a safe and efficient installation method for thin-walled, low-stiffness roof beams that can overcome the above-mentioned defects. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a rapid installation method for roof beams of steel structure factory buildings. This method transforms the risky high-altitude component installation mode into a ground-based overall assembly and one-time hoisting construction mode, which is simple to operate, highly safe, and can effectively guarantee installation quality and efficiency.

[0005] To achieve this technical objective, the present invention adopts the following solution: A method for quickly installing roof beams of a steel structure factory building includes the following steps: Ground layout and preparation: On the ground of the construction site, lay out the layout according to the axial spacing of the factory columns, and plan the assembly area of ​​at least two spans of roof beams. Roof beam placement on the ground: hoist at least two roof beams to the assembly area, adjust them to the designed position and elevation, and then fix them with temporary supports; Ground assembly: Purlins, beam top supports and supporting components are installed on the roof beams fixed to the ground, so that multiple roof beams and connecting components are assembled on the ground to form a stable whole structure; Overall hoisting and positioning: The entire structure is hoisted to the top of the factory building columns at the designed elevation in one go and then fixed.

[0006] Furthermore, lifting lugs are installed on the roof beams.

[0007] Furthermore, in the ground layout and preparation steps, the number of roof beam spans for one layout and assembly is 2 or 3 spans. This range is determined based on the lifting performance of conventional cranes, the size limitations of component transportation, and efficiency optimization.

[0008] Furthermore, in the overall ground assembly step, the installed purlins and supporting components include horizontal supports and diagonal braces between beams, which together with the roof beams form a planar truss system to enhance lateral stiffness.

[0009] Furthermore, during the overall hoisting and positioning process, matching lifting equipment is selected based on the weight and dimensions of the overall structure, and safety cables are attached during hoisting to control its swing.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: Significantly improves hoisting stability: By assembling multiple independent thin-walled beams, purlins, and supports into a stable spatial structure on the ground, the problems of hoisting sway and "tilting" after positioning caused by insufficient lateral stiffness of a single beam are completely solved, ensuring that the hoisting posture remains stable and controllable at all times.

[0011] Significantly improves installation efficiency and safety: The installation of purlins and supports, which traditionally require working at heights, is moved to the ground, realizing "ground-based high-altitude operations and integrated decentralized operations." This greatly reduces the amount and duration of high-altitude work, lowers safety risks such as falls and falling objects, and shortens the overall project duration.

[0012] Optimize machinery use and save costs: Integrating multi-span components into a single hoisting operation reduces the number of crane cycles of frequent movement, hooking, and unhooking, effectively reducing the number of shifts required for large hoisting equipment and thus lowering machinery costs.

[0013] Ensuring installation quality: Good ground assembly conditions facilitate precise adjustments and quality control. The resulting overall structure provides a stable and accurate working platform for subsequent processes after hoisting into place, thus improving the overall installation accuracy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a rapid installation method for the roof beams of a steel structure factory building according to an embodiment of the present invention.

[0015] Figure 2 for Figure 1 Top view.

[0016] The markings in the diagram are: 1. Roof beam; 2. Purlin; 3. Beam top support; 4. Lifting lug; 5. Safety cable; 6. Lifting equipment; 7. Factory building column. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0018] Please see Figure 1 and Figure 2 This invention provides a rapid installation method for roof beams of steel structure factory buildings, comprising the following steps: Ground layout and preparation: Level the construction site, clear debris and obstacles from the assembly area, ensuring the work area is firm and level. On the construction site ground, lay out the assembly area for at least two spans of roof beam 1 according to the axial spacing of the factory building columns 7 in the construction drawings. The number of spans of roof beam 1 laid out and assembled at one time is 2 or 3 spans. This range is determined comprehensively based on the lifting performance of conventional cranes, component transportation size limitations, and efficiency optimization, taking into account both feasibility and efficiency. Roof beam 1 includes, but is not limited to, roof beam components with relatively low lateral stiffness such as lightweight H-beams.

[0019] Roof beam 1 ground positioning: At least two roof beams 1 are hoisted to the assembly area, and the position, elevation and verticality of the roof beams are adjusted to meet the design requirements. Temporary supports are used for fixation to ensure stability during ground assembly. Several lifting lugs 4 are set on the roof beam 1. The number and position of the lifting lugs 4 are determined based on the weight, span and overall structural stress analysis of the roof beam 1.

[0020] Ground-based assembly: Purlins 2, beam top supports 3, and supporting components are installed on the roof beams 1 fixed to the ground, assembling multiple roof beams 1 and connecting components into a stable overall structure on the ground. The installed purlins 2 and supporting components include horizontal supports and diagonal braces between beams, which, together with the roof beams 1, constitute a planar truss system that enhances lateral stiffness. Purlins 2 are generally made of C-shaped steel.

[0021] Overall hoisting and positioning: After assembly, a comprehensive quality inspection is carried out. After passing the inspection, a matching hoisting equipment 6 is selected according to the weight and size of the overall structure. During hoisting, a safety cable 5 is attached to control the swaying of the overall structure. Then, the overall structure is hoisted to the top of the factory column 7 at the designed elevation and fixed.

[0022] Compared with the traditional single-beam hoisting method, the construction period of the roof beam installation process of this invention is shortened by more than 20%, the number of large lifting equipment shifts is significantly reduced, and the overall construction cost is significantly reduced. No safety accidents occurred during the construction process, and the overall dimensional deviation of the roof beam installation was controlled within 5mm, which is far below the allowable deviation of the specification. The installation quality was significantly improved, providing a stable working platform for subsequent roof construction. The overall project was highly recognized by the construction unit and the supervision unit.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. If these modifications and variations fall within the scope of the claims of the present invention and their equivalents, they should be considered to be within the protection scope of the present invention.

Claims

1. A method for rapid installation of roof beams in a steel structure factory building, characterized in that, Includes the following steps: Ground layout and preparation: On the ground of the construction site, lay out the layout according to the axial spacing of the factory columns, and plan the assembly area of ​​at least two spans of roof beams. Roof beam placement on the ground: hoist at least two roof beams to the assembly area, adjust them to the designed position and elevation, and then fix them with temporary supports; Ground assembly: Purlins, beam top supports and supporting components are installed on the roof beams fixed to the ground, so that multiple roof beams and connecting components are assembled on the ground to form a stable whole structure; Overall hoisting and positioning: The entire structure is hoisted to the top of the factory building columns at the designed elevation in one go and then fixed.

2. The rapid installation method for steel structure factory roof beams according to claim 1, characterized in that, The roof beams are equipped with lifting lugs.

3. The rapid installation method for steel structure factory roof beams according to claim 1, characterized in that, In the ground layout and preparation steps, the number of roof beam spans for one layout and assembly is 2 or 3 spans.

4. The rapid installation method for steel structure factory roof beams according to claim 1, characterized in that, In the overall ground assembly process, the installed purlins and supporting components include horizontal supports and diagonal braces between beams, which together with the roof beams form a planar truss system to enhance lateral stiffness.

5. The rapid installation method for steel structure factory roof beams according to claim 1, characterized in that, During the overall hoisting and positioning process, matching lifting equipment is selected based on the weight and dimensions of the overall structure, and safety cables are attached during hoisting to control its swing.

Images