A method for in-depth design of ceiling transfer layer under restricted conditions in ultra-large three-dimensional space

Abstract

The present invention is a method for deepening the design of a suspended ceiling transition layer under restricted conditions in an ultra-large three-dimensional space; it includes deepening the layout of the comprehensive suspended ceiling panels in the ultra-large space to confirm the module and unit of the suspended ceiling; using finished C-shaped steel as a full-length crossbar; connecting the double-jointed C-shaped channel steel hanger with two inclined tension screw rods at the added crossbar position; selecting the maximum load position according to the different positions and functional requirements of each suspended ceiling; selecting suitable structural model materials for the crossbar, hanger, base connected to the truss, diagonal rod and various connecting parts; after the large-scale installation of the transition layer bracket and forming a whole, adding C-shaped steel perpendicular to the direction of the transition layer crossbar position to connect the two adjacent bracket crossbars, and reliably connecting and fixing the crossbar to the structural column at the position close to the structural column. The implementation of the present invention can avoid the setting of too many auxiliary beams between trusses and the excessive length of the gate-type support hanger rod, thereby increasing the load of the overall bracket system and reducing the difficulty of the construction process, and ultimately accelerating the construction efficiency.

Description

Technical Field

[0001] The present invention relates to the field of electromechanical technology, and in particular to a method for deepening the design of a suspended ceiling transfer layer under restricted conditions in an ultra-large three-dimensional space. Background Art

[0002] The structural form of automobile factories is mostly steel truss structures, which generally have large column spacing and large spacing between trusses in large spans. Therefore, when the cleanroom area is located in such a space, the height difference between the lower elevation of the truss and the upper elevation of the clean ceiling panels far exceeds the regulatory requirements, resulting in the need to install a transfer layer within the ultra-high space. This transfer layer serves as the rooting point for all professional supports for energy center media within the entire ceiling space. The entire transfer layer carries the clean ceiling panels, HVAC ducts and mechanical exhaust fire panels, high-efficiency air supply vents, swirl vents, smoke barrier walls, bridges, lighting fixtures, and subsequent maintenance personnel. Due to the large elevation difference between the truss structure and the ceiling, conventional methods cannot be used as rooting points for supports. Therefore, a large number of steel auxiliary beams and joint deepening are required, which increases the overall load of the entire truss system, making subsequent construction difficult, costly, risky, and inefficient. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned defects and to provide a method for optimizing the ceiling transition layer under restricted conditions in a super-large three-dimensional space.

[0004] In order to achieve the above object, the present invention is achieved as follows:

[0005] A method for in-depth design of ceiling transfer layers under restricted conditions in a large three-dimensional space, including

[0006] Step 1: Based on the special structural form, in a large space, use BIM software to comprehensively deepen the layout of the ceiling panels, first confirm the ceiling module according to the ceiling plan layout, and finally confirm the module and unit of the ceiling;

[0007] Step 2: Confirm that the long side of the ceiling panel is arranged parallel to the truss structure system. Then, the single-frame support system of the transfer layer is arranged perpendicular to the truss. Further confirm the arrangement spacing and calculate the number of ceiling panels.

[0008] Step 3. Based on the spacing between the trusses, finished C-shaped steel is used as the full-length crossarm. Since the span is too large, the middle part is easily disturbed under stress. Therefore, two inclined wire rod hanging points are added to the full-length crossarm position, dividing the crossarm into three equal parts to make the stress uniform. The rooting position of the inclined wire rod at the other end is set at the hanger. The entire ceiling panel and the professional load installed above are transferred to the hanger position.

[0009] Step 4: Use the custom-made beam clamp to fix the single hanger rod to the root of the truss and the lower flange plate of the lower truss. The cross arm is a single C-shaped channel steel, which is fixed to the vertical double C-shaped channel steel using the base connector.

[0010] Step 5: Use fixed triangular connectors to connect the ends of the double C-channel steel hanger rod and the double C-channel steel crossarm, and use high-strength bolts to fix the crossarms;

[0011] Step 6: Add two inclined tension screw rods to the double C-shaped channel steel boom and the added cross arm. Use the steering connector to securely fix the connection. The screw rods are at a 45° stress angle to the boom cross arm to ensure uniform stress.

[0012] Step 7: Based on the different locations and functional requirements of each suspended ceiling, select the maximum load position, set the load partial factor to 1.35, and the additional safety factor to 1.2. Select the most unfavorable position (upper and lower double-layer positions) for stress analysis. Based on the stress analysis, select appropriate structural models and materials for the crossarms, hangers, bases connected to the trusses, diagonal rods, and various connecting parts while ensuring safety and reliability.

[0013] Step 8: After confirming the crossarms, hangers, bases connected to the trusses, diagonal rods and various connectors, before installation, conduct a tensile test on the individual hanging points to obtain the actual measured values ​​on site and compare them with the theoretical values;

[0014] Step 9: After the transfer layer brackets are installed on the large surface and formed into a whole, add C-shaped steel perpendicular to the direction of the transfer layer crossarm to connect the crossarms of two adjacent brackets. At the position close to the structural column, reliably connect and fix the crossarms to the structural column to increase the stability of the entire ceiling transfer layer.

[0015] Step 10. After the entire transfer layer system is installed, the brackets of the ceiling panels and the various specialties distributed on the ceiling panels, as well as the specialties in the space between the transfer layer and the ceiling panels, are all rooted at the crossarm position of the transfer layer; the operation is completed.

[0016] By implementing the steps of the present invention, it is possible to avoid excessive auxiliary beams between trusses and excessively long hanger rods for portal supports, thereby increasing the load on the overall support system and reducing the difficulty of the construction process, ultimately accelerating construction efficiency. Furthermore, by lightweighting the transfer layer, the procurement and installation costs of the auxiliary beam steel are reduced, and the load on the roof caused by the auxiliary beam load is alleviated; construction is facilitated, installation efficiency is improved, construction time is shortened, and safety risks are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the conversion layer layout shown in the present invention. DETAILED DESCRIPTION

[0018] The present invention is further illustrated below by means of specific examples.

[0019] like Figure 1 As shown in the figure, in order to ensure the safety of the transfer layer system structure, the first phase (first bid) general contracting project of a certain intelligent automobile industrial park optimized the ceiling transfer layer system and the electromechanical pipe system space under restricted conditions in the ultra-large three-dimensional space, and designed the installation of the support and hanger system.

[0020] Step 1: Based on the special structural form, in the ultra-large space of 32*6m, with the support of BIM technology, the comprehensive ceiling panel layout was deepened. The ceiling module was first confirmed according to the ceiling plan layout, and finally confirmed to be a ceiling module unit of 1.2m*2.4m.

[0021] Step 2: Confirm that the long side of the ceiling panels is parallel to the truss structure. The single-frame transfer layer support system is arranged perpendicular to the trusses, with spacing of 2.4m per truss length. The spacing between trusses is 6m, so the overall space within the two-frame transfer layer support system is divided into 6m*2.4m, allowing for a total of five ceiling panels.

[0022] Step 3: The spacing between trusses is 6m, and finished C-shaped steel is used as the cross arm. Due to the large span,

[0023] The middle section is prone to downward movement under load, so two inclined brace rod suspension points are added along the entire cross arm, dividing the cross arm into thirds to ensure uniform load distribution. The rooting point of the inclined brace rod at the other end is set at the hanger, transferring the entire ceiling panel and the load of the installation above to the hanger.

[0024] Step 4: Use the finished customized beam clamp to fix the single hanger position and the truss root to the lower flange plate of the lower truss. The cross arm is a single C-shaped channel steel, which is fixed to the vertical double-shaped C-shaped channel steel using the base connector.

[0025] Step 5: Use fixed triangular connectors to connect the ends of the double-jointed C-channel steel hanger and the double-jointed C-channel steel crossarm, and use high-strength bolts to fix the crossarm position.

[0026] Step 6: Add two inclined tension screw rods to the double C-shaped channel steel hanger and add cross arms. Use steering connectors to securely fix the connection. The screw rods should have a 45° load angle with the hanger cross arms to ensure uniform force.

[0027] Step 7: After the system is set up, the top of the cross arm can carry other electromechanical professional arrangements, and a door-type hanging bracket can be set under the cross arm to meet the requirements of electromechanical installation specifications and avoid the problem of difficulty in rooting electromechanical brackets in ultra-large spaces.

[0028] Step 8: According to the different positions and functional requirements of each suspended ceiling, select the maximum load position, the load partial coefficient is 1.35, the additional safety factor is 1.2, and the most unfavorable position, the upper and lower double positions, are selected for force analysis. Based on the force analysis, and on the premise of ensuring safety and reliability, select appropriate structural models and materials for the crossarms, hangers, bases connected to the trusses, diagonal rods and various connecting parts.

[0029] Step 9: After confirming the crossarms, hangers, bases connected to the trusses, diagonal rods and various connecting parts, before installation, conduct a tensile test on the position of each hanging point to obtain the actual measured value on site and compare and analyze it with the theoretical value.

[0030] Step 10: After the transfer layer bracket is installed on a large surface and formed into a whole, add C-shaped steel perpendicular to the direction of the transfer layer cross arm to connect the two adjacent bracket cross arms. At the position close to the structural column, reliably connect and fix the cross arm to the structural column, thereby increasing the stability of the entire ceiling transfer layer.

[0031] Step 11: After the entire transfer layer system is installed, the brackets of the ceiling panels and the various professions distributed on the ceiling panels, as well as the professions in the space between the transfer layer and the ceiling panels, can be rooted at the cross arm position of the transfer layer; the operation is completed.

Claims

1. A method for in-depth design of a suspended ceiling transition layer under restricted conditions in an ultra-large three-dimensional space, characterized by: include Step 1: Based on the special structural form, in a large space, use BIM software to comprehensively deepen the layout of the ceiling panels, first confirm the ceiling module according to the ceiling plan layout, and finally confirm the module and unit of the ceiling; Step 2: Confirm that the long side of the ceiling panel is arranged parallel to the truss structure system. Then, the single-frame support system of the transfer layer is arranged perpendicular to the truss. Further confirm the arrangement spacing and calculate the number of ceiling panels. Step 3. Based on the spacing between the trusses, finished C-shaped steel is used as the full-length crossarm. Since the span is too large, the middle part is easily disturbed under stress. Therefore, two inclined wire rod hanging points are added to the full-length crossarm position, dividing the crossarm into three equal parts to make the stress uniform. The rooting position of the inclined wire rod at the other end is set at the hanger. The entire ceiling panel and the professional load installed above are transferred to the hanger position. Step 4: Use the custom-made beam clamp to fix the single hanger rod to the root of the truss and the lower flange plate of the lower truss. The cross arm is a single C-shaped channel steel, which is fixed to the vertical double C-shaped channel steel using the base connector. Step 5: Use fixed triangular connectors to connect the ends of the double C-channel steel hanger rod and the double C-channel steel crossarm, and use high-strength bolts to fix the crossarms; Step 6: Add two inclined tension screw rods to the double C-shaped channel steel boom and the added cross arm. Use the steering connector to securely fix the connection. The screw rods are at a 45° stress angle to the boom cross arm to ensure uniform stress. Step 7: Based on the different locations and functional requirements of each suspended ceiling, select the maximum load position, set the load partial factor to 1.35, and the additional safety factor to 1.

2. Select the most unfavorable position (upper and lower double-layer positions) for stress analysis. Based on the stress analysis, select appropriate structural models and materials for the crossarms, hangers, bases connected to the trusses, diagonal rods, and various connecting parts while ensuring safety and reliability. Step 8: After confirming the crossarms, hangers, bases connected to the trusses, diagonal rods and various connectors, before installation, conduct a tensile test on the individual hanging points to obtain the actual measured values ​​on site and compare them with the theoretical values; Step 9: After the transfer layer brackets are installed on the large surface and formed into a whole, add C-shaped steel perpendicular to the direction of the transfer layer crossarm to connect the crossarms of two adjacent brackets. At the position close to the structural column, reliably connect and fix the crossarms to the structural column to increase the stability of the entire ceiling transfer layer. Step 10. After the entire transfer layer system is installed, the brackets of the ceiling panels and the various specialties distributed on the ceiling panels, as well as the specialties in the space between the transfer layer and the ceiling panels, are all rooted at the crossarm position of the transfer layer; the operation is completed.

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