A method for installing a special-shaped metal suspended ceiling board keel

Abstract

The present application relates to the technical field of building construction, and discloses a special-shaped metal suspended ceiling board keel mounting method, which reversely determines a target positioning point based on the surface of the special-shaped metal suspended ceiling board, determines the mounting position of a rear-mounted embedded part and measures the Z-direction height difference by using a three-dimensional lofting device, and then prepares a vertical square tube according to the Z-direction height difference, and meanwhile, a horizontal square tube is prefabricated into a horizontal keel frame on the ground and is integrally hoisted and connected, so that the plane position of the rear-mounted embedded part, the length of the vertical square tube and the modeling accuracy of the horizontal keel frame can be simultaneously controlled. Thus, the error accumulation caused by the unevenness of the structure top surface, the length error of the vertical square tube, the on-site dispersed assembly and the multiple adjustments can be reduced, and the plate joint consistency, the surface flatness and the modeling restoration degree of the special-shaped metal suspended ceiling board are improved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a method for installing irregularly shaped metal ceiling panel keel. Background Technology

[0002] As architectural decoration projects develop towards customization, special shapes, and refinement, metal ceiling panels have been widely used in large public buildings, commercial spaces, exhibition spaces, and high-end interior decoration projects. To meet the artistic expression and decorative effect requirements of architectural spaces, special-shaped metal ceiling panels are usually designed in arc, zigzag, curved, or various irregular undulating combinations. Their complex shapes and highly customized panel sizes place high demands on the accuracy of keel installation, spatial positioning, and the flatness of the finished surface.

[0003] During the construction of irregularly shaped metal ceiling panels, the keel is the basic supporting component connecting the building structure and the metal ceiling panels. Its installation quality directly affects the fidelity of the finished ceiling surface, the precision of panel splicing, and the overall aesthetic quality. Especially for metal ceiling panels with irregular undulating shapes, if there are deviations in the plane position, elevation position, or component length of the keel, it will lead to problems such as excessively wide or narrow gaps between panels, insufficient overlap, misalignment, uneven surfaces, and deviations from the design drawings during subsequent installation. In severe cases, it may even result in the panels being unable to be installed or large-scale rework.

[0004] In the current installation process of irregular-shaped metal ceiling panel keels, a decentralized installation method is typically adopted, where vertical square tubes are fixed first, and then horizontal square tubes are assembled on-site. This method mainly relies on measuring tapes, levels, total stations, or manual verification for measurement and positioning. In actual construction, due to the unevenness, local deviations, and construction errors that are common on the ceiling surface of building structures, traditional measurement methods are difficult to accurately obtain the Z-axis height difference between the structural ceiling surface and the target positioning point of the ceiling keel, leading to errors in the cutting length of the vertical square tubes. When the vertical square tubes are too long, they can easily push the lower keel or ceiling panel; when the vertical square tubes are too short, it can cause local sinking of the ceiling keel or excessive gaps in the connections, thus affecting the overall flatness and structural stability of the ceiling.

[0005] Meanwhile, the shape of irregularly shaped metal ceiling panels is not a single plane or regular curved surface, but rather a combination of multiple segments with different elevations, curvatures, or broken lines. Traditional construction methods often struggle to simultaneously control the X-axis, Y-axis plane coordinates, and Z-axis elevation of each positioning point during positioning. Construction workers need to take multiple measurements, make repeated adjustments, and perform temporary corrections on-site. Since each positioning deviation can be transmitted to adjacent joists or metal panels, errors from multiple positioning points can easily accumulate, ultimately leading to a discrepancy between the overall outline of the joist frame and the designed shape, affecting the accuracy of the finished surface's shape reproduction.

[0006] Although some existing curtain wall keel or curved keel construction projects have adopted measuring equipment to assist in spatial positioning in order to improve the keel installation accuracy, the relevant construction methods mostly focus on the on-site positioning and adjustment of single keels or local keels. They usually do not systematically design for the precise control of the finished surface benchmark, plate thickness, installation operation space, and vertical square tube length of irregular metal ceiling panels. It is also difficult to effectively solve the problem of ceiling panel splicing quality caused by uneven top surface of the structure, vertical component length error, on-site assembly error of horizontal keel, and the accumulation of multiple positioning errors. Summary of the Invention

[0007] This invention provides a method for installing irregularly shaped metal ceiling panel keel, which solves the problems in the existing installation of irregularly shaped metal ceiling panel keel, such as uneven top surface, difficulty in accurately determining the length of vertical square tubes, poor adaptability of irregular contour positioning, and accumulation of on-site scattered assembly errors, which lead to misalignment of ceiling panels, abnormal panel seams, uneven surface, and insufficient shape reproduction.

[0008] This invention provides a method for installing irregularly shaped metal ceiling panel keel, comprising the following steps: Determine target positioning points. Based on the design of the irregular metal ceiling panel, determine multiple target positioning points. Each target positioning point corresponds to the lower installation position of multiple vertical square tubes. Each target positioning point is formed by offsetting the finished surface of the irregular metal ceiling panel by a preset distance along the direction towards the top surface of the structure. Lofting and positioning, and measuring the height difference, inputting the three-dimensional coordinates of each target positioning point into a three-dimensional lofting device, the three-dimensional lofting device projecting laser points corresponding to each target positioning point onto the top surface of the structure, and calculating the Z-axis height difference between the position of each laser point on the top surface of the structure and the corresponding target positioning point; Prepare vertical square tubes, and subtract the thickness of the corresponding post-embedded parts according to the height difference in the Z direction to obtain the cutting length of each vertical square tube, and cut each vertical square tube according to the corresponding cutting length. Fix the rear embedded parts, and fix the multiple rear embedded parts to the top surface position of the structure corresponding to each laser point; To prepare a horizontal keel frame, horizontal square tubes are pre-assembled into a horizontal keel frame on the ground according to the design shape of the irregular metal ceiling panel. The entire assembly is completed by hoisting the horizontal keel frame to the designed height, connecting the upper ends of each vertical square tube to the corresponding post-embedded parts, and connecting the lower ends of each vertical square tube to the horizontal keel frame to form an overall keel structure that matches the design of the irregular metal ceiling panel.

[0009] Beneficial effects: This application utilizes the offset of irregularly shaped metal ceiling panels to create target positioning points, ensuring that the keel installation reference directly corresponds to the final ceiling shape. A three-dimensional layout device projects laser points onto the top surface of the structure and calculates the Z-axis height difference point by point, allowing the position of the embedded parts and the length of the vertical square tubes to adapt to the unevenness of the top surface. The cutting length of the vertical square tubes is determined by subtracting the thickness of the embedded parts from the Z-axis height difference, avoiding pushing, sinking, or connection gaps caused by errors in the length of the vertical square tubes. Horizontal square tubes are pre-assembled into a horizontal keel frame on the ground before being hoisted and connected, reducing repeated adjustments and error accumulation during the dispersed installation on the ceiling. Thus, multiple embedded parts, multiple vertical square tubes, and the horizontal keel frame can form an overall keel structure that matches the design shape of the irregularly shaped metal ceiling panels, thereby improving the positioning accuracy of the embedded parts, the length accuracy of the vertical square tubes, and the shape accuracy of the horizontal keel frame. This improves the splicing quality of the ceiling panels, the consistency of the panel seams, the surface flatness, and the shape reproduction, while also increasing construction efficiency and reducing rework costs.

[0010] According to some embodiments of the present invention, when determining multiple target positioning points, the outline control points of the horizontal keel frame are determined based on the arc, zigzag, or curved surface design of the irregular metal ceiling panel, and the outline control points are used as the target positioning points at the lower end of the corresponding vertical square tube.

[0011] Beneficial effects: By determining the outline control points of the horizontal keel frame based on the arc, zigzag, or curved design of the irregular metal ceiling panels, and using these outline control points as the target positioning points for the lower ends of the corresponding vertical square tubes, the support positions of the vertical square tubes can directly correspond to the key positions of the horizontal keel frame, avoiding the disconnect between the target positioning points and the actual irregular outline control positions. Simultaneously, complex irregular shapes can be decomposed into multiple clear spatial control points, establishing a correspondence with subsequent 3D lofting, Z-axis height difference calculation, vertical square tube length cutting, and horizontal keel frame assembly. This improves the positioning accuracy and shape reproduction of the arc, zigzag, or curved ceiling outlines, reduces the accumulation of on-site adjustment errors, and improves the splicing quality of the ceiling panels, the consistency of the panel seams, and the overall aesthetic effect.

[0012] According to some embodiments of the present invention, the three-dimensional lofting device automatically calculates the corresponding horizontal and vertical angles based on the three-dimensional coordinates of each target positioning point, and adjusts the laser projection direction so that each laser point is projected to the designed fixed position of the corresponding post-embedded part.

[0013] Beneficial effects: By enabling the 3D layout device to automatically calculate the corresponding horizontal and vertical angles based on the 3D coordinates of each target positioning point and adjust the laser projection direction to the design fixed position of the corresponding post-embedded part, the spatial coordinates of the target positioning point can be directly converted into the installation reference of the post-embedded part on the top surface of the structure, reducing positioning errors caused by manual conversion, manual point turning, and repeated verification. At the same time, it ensures that the laser point position, the fixed position of the post-embedded part, and the Z-axis height difference measurement position are consistent, thereby ensuring the one-to-one correspondence between the post-embedded part, the vertical square tube, and the horizontal keel frame, improving the planar positioning accuracy of the irregular metal ceiling panel keel installation, the reliability of the vertical square tube length calculation, and the overall assembly efficiency.

[0014] According to some embodiments of the present invention, each laser point is the installation center point of the corresponding post-embedded part, the anchor bolt hole reference point, or the boundary positioning point.

[0015] Beneficial effects: By defining each laser point as the installation center point, anchor bolt hole reference point, or boundary positioning point of the corresponding post-installed embedded part, the laser points projected by the three-dimensional layout device can be directly used as the specific assembly reference during the installation process of the post-installed embedded part. Among them, positioning with the installation center point can improve the overall positional accuracy of the post-installed embedded part, positioning with the anchor bolt hole reference point can reduce secondary measurement and drilling deviation, and positioning with the boundary positioning point can control the edge position and installation orientation of the post-installed embedded part. This avoids the impact of the overall offset, hole position deviation, or rotation deviation of the post-installed embedded part on the connection accuracy of the vertical square tube, further improving the correspondence accuracy between the post-installed embedded part, the vertical square tube, and the horizontal keel frame, as well as the forming quality of the overall keel structure.

[0016] According to some embodiments of the present invention, the preset distance is determined based on the cross-sectional dimensions of the horizontal square tube, the thickness of the irregular metal ceiling panel, and the installation and operation space; the preset distance is the sum of the cross-sectional height of the horizontal square tube, the thickness of the irregular metal ceiling panel, and the dimensions of the installation and operation space.

[0017] Beneficial effects: By limiting the preset distance between the target positioning point and the finished surface of the irregular metal ceiling panel to the sum of the cross-sectional height of the horizontal square tube, the thickness of the irregular metal ceiling panel, and the dimensions of the installation space, the positioning position of the lower end of the vertical square tube can be accurately obtained by reverse calculation from the finished ceiling surface. This ensures that the keel installation benchmark simultaneously meets the requirements of the horizontal keel frame layout, panel thickness positioning, and on-site installation operations. It avoids issues such as horizontal keel frame position deviation, panel pushing, insufficient overlap, abnormal panel joints, or uneven surfaces caused by determining the offset distance based on experience or insufficient consideration of structural dimensions. At the same time, this dimensional relationship ensures a consistent spatial correspondence between multiple target positioning points and the irregular finished surface, improving the accuracy of restoring curved, zigzag, or curved ceiling shapes and the subsequent panel installation quality.

[0018] According to some embodiments of the present invention, before cutting each of the vertical square tubes, the target positioning points, corresponding laser points, corresponding Z-axis height differences and corresponding cutting lengths are numbered and matched, and the cut vertical square tubes are installed between the corresponding post-embedded parts and the horizontal keel frame according to the numbering.

[0019] Beneficial effects: Before cutting each vertical square tube, each target positioning point, corresponding laser point, corresponding Z-axis height difference, and corresponding cutting length are numbered and matched. The cut vertical square tubes are then installed according to the numbering. This ensures a one-to-one correspondence between the measurement points, embedded parts, component lengths, and installation positions. This avoids mismatches between the length of the vertical square tubes and the actual installation position due to data confusion, incorrect component installation, or incorrect installation position during the construction of multi-point irregular ceilings. At the same time, this numbering matching method facilitates batch measurement, fixed-length cutting, classified stacking, and installation by number, improving construction organization efficiency and deviation traceability. This further ensures the consistency of the horizontal keel frame's elevation, the stability of its outline, and the forming accuracy of the overall keel structure.

[0020] According to some embodiments of the present invention, the post-embedded component is a rectangular steel plate, which is fixed to the top surface of the structure by chemical anchors.

[0021] Beneficial effects: By defining the post-installed embedded parts as rectangular steel plates and fixing them to the top surface of the structure with chemical anchors, the embedded parts can have regular positioning references and stable connection surfaces, facilitating rapid and accurate installation in conjunction with laser points projected by the 3D layout device. Simultaneously, the rectangular steel plates increase the force transfer area between the vertical square tubes and the top surface of the structure, improving the load-bearing capacity and anti-displacement ability of the connection nodes. The chemical anchors can adapt to the post-installation requirements after the main structure is completed, allowing the embedded parts to be flexibly arranged and reliably anchored according to the irregular ceiling design. Furthermore, the defined thickness of the rectangular steel plates facilitates accurate deduction when calculating the cutting length of the vertical square tubes, thereby improving the length control accuracy of the vertical square tubes, ensuring stable connections between the embedded parts, vertical square tubes, and horizontal keel frame, and reducing keel misalignment, local deformation, and unevenness of the finished ceiling surface.

[0022] According to some embodiments of the present invention, the horizontal square tube is welded to form the horizontal keel frame after being positioned on the ground with the assistance of limiting members.

[0023] Beneficial effects: By welding horizontal square tubes to form a horizontal keel frame after they are positioned on the ground with the aid of limiting components, the position, angle, spacing, and irregular contour boundaries of the horizontal square tubes can be constrained before welding, avoiding positioning deviations caused by manual placement and temporary on-site adjustments. At the same time, the limiting components can restrict the sliding, rotation, or thermal deformation of the horizontal square tubes during welding, so that the horizontal keel frame has high contour accuracy and overall stability before hoisting. This solution, in conjunction with the target positioning points, fixed-length cutting of vertical square tubes, and overall assembly, can ensure that the connection position of the horizontal keel frame accurately corresponds to the installation position of the lower end of each vertical square tube, thereby improving the shape reproduction, splicing accuracy, and assembly efficiency of the irregular metal ceiling panel keel structure, and reducing the error accumulation and rework risk caused by dispersed assembly at high altitudes.

[0024] According to some embodiments of the present invention, the upper end of the vertical square tube is fully welded to the rear embedded part, and the lower end of the vertical square tube is fully welded to the horizontal keel frame.

[0025] Beneficial effects: By fully welding the upper end of the vertical square tube to the post-installed embedded part and the lower end to the horizontal keel frame, continuous and reliable fixed nodes can be formed at both ends of the vertical square tube. This improves the tensile, shear, and deflection resistance between the vertical square tube, the top surface of the structure, and the horizontal keel frame. The load of the irregular metal ceiling panel and the horizontal keel frame can be stably transferred to the post-installed embedded part and the top surface of the structure through the vertical square tube. At the same time, this full welding connection method can reliably solidify the vertical square tube cut to a fixed length and the horizontal keel frame pre-assembled on the ground into an integral structure. This reduces node loosening, local sinking, frame torsion, and contour offset during hoisting, welding, and subsequent panel installation, thereby improving the connection strength, elevation stability, shape retention ability, and long-term reliability of the overall keel structure.

[0026] According to some embodiments of the present invention, after the integral keel structure is formed, a three-dimensional layout device or a total station is used to verify the XY plane position and Z-axis elevation of the integral keel structure.

[0027] Beneficial effects: By using a three-dimensional layout device or total station to verify the XY plane position and Z-axis elevation of the overall keel structure after its formation, potential plane offsets, elevation deviations, local misalignments, or overall tilts that may occur during hoisting, welding, and overall assembly can be detected in a timely manner. This enables the application to form a closed-loop precision control system of "preliminary layout and positioning, process-based fixed-length assembly, and post-assembly verification." Simultaneously, this verification method can confirm whether the embedded parts, vertical square tubes, and horizontal keel frames meet the design spatial relationships before the installation of irregularly shaped metal ceiling panels. This prevents keel deviations from being transmitted to the panel splicing stage, thereby reducing the risk of abnormal panel seams, splicing misalignments, uneven surfaces, and rework, and improving the installation accuracy, quality control, and fidelity of the irregularly shaped ceiling structure. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a flowchart illustrating a method for installing irregularly shaped metal ceiling panel keel according to an embodiment of the present invention; Figure 2 This is a diagram illustrating the installation structure of a non-standard metal ceiling panel keel provided in an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures: 1. Horizontal keel frame; 2. Vertical square tube; 3. Post-installed embedded parts; 4. Irregularly shaped metal ceiling panels. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1 Figure 2 This embodiment provides a 4-keel installation structure for an irregularly shaped metal ceiling panel, referring to... Figure 1As shown, this embodiment provides a method for installing the keel of an irregularly shaped metal ceiling panel 4, applicable to irregularly shaped metal ceiling panels 4 with arc, zigzag, curved, or irregular undulating shapes. The keel of the irregularly shaped metal ceiling panel 4 includes multiple post-embedded parts 3, multiple vertical square tubes 2, and a horizontal keel frame 1 composed of multiple horizontal square tubes. The multiple post-embedded parts 3 are fixed to the top surface of the structure, and the multiple vertical square tubes 2 are respectively connected between the corresponding post-embedded parts 3 and the horizontal keel frame 1. The horizontal keel frame 1 is used to support the irregularly shaped metal ceiling panel 4 and matches the design shape of the irregularly shaped metal ceiling panel 4.

[0033] In this embodiment, the installation method includes the following steps: S1. Determine target positioning points: Determine multiple target positioning points based on the design shape of the irregular metal ceiling panel 4. Specifically, based on the detailed design drawings or three-dimensional model of the irregular metal ceiling panel 4, determine the spatial shape parameters of the finished surface of the irregular metal ceiling panel 4. The spatial shape parameters include the finished surface elevation, planar outline, curvature of the arc segment, turning position of the broken line segment, and undulation height of the curved surface segment.

[0034] When determining the target positioning points, based on the arc, zigzag, or curved design of the irregular metal ceiling panel 4, multiple contour control points of the horizontal keel frame 1 are determined, and these contour control points are used as the target positioning points for the lower ends of the corresponding vertical square tubes 2. Each target positioning point corresponds to the lower end installation position of multiple vertical square tubes 2. After this setting, the lower end support position of the vertical square tubes 2 can directly correspond to the shape control position of the horizontal keel frame 1, which helps to ensure the accuracy of the horizontal keel frame 1 in restoring the irregular ceiling shape.

[0035] Each target positioning point is formed by offsetting the finished surface of the irregular-shaped metal ceiling panel 4 by a preset distance along the direction towards the top surface of the structure. The preset distance is determined based on the cross-sectional dimensions of the horizontal square tube, the thickness of the irregular-shaped metal ceiling panel 4, and the installation and operation space. Preferably, the preset distance is the sum of the cross-sectional height of the horizontal square tube, the thickness of the irregular-shaped metal ceiling panel 4, and the dimensions of the installation and operation space.

[0036] For example, in this embodiment, the cross-sectional height of the horizontal square tube is 80mm, the thickness of the irregular metal ceiling panel 4 is 20mm, and the installation operation space is 10mm, then the preset distance is 110mm. Therefore, the target positioning point is the position where the irregular metal ceiling panel 4 is offset 110mm from the top surface of the structure. This offset takes into account the space occupied by the horizontal keel frame 1, the thickness of the metal ceiling panel, and the on-site installation operation space, thus establishing a clear dimensional relationship between the keel installation reference and the final finished surface of the ceiling. This 110mm offset is composed of the 80mm horizontal square tube cross-sectional dimension, the 20mm metal plate thickness, and the 10mm installation operation space.

[0037] S2. Lofting and Positioning, and Measuring Height Differences: Input the three-dimensional coordinates of each target positioning point into the three-dimensional lofting device. The three-dimensional coordinates are the X, Y, and Z coordinates of each target positioning point in the construction coordinate system.

[0038] In this embodiment, the three-dimensional lofting device can be a lofting equipment with functions such as three-dimensional coordinate reading, automatic angle calculation, laser projection, and height difference measurement. Preferably, the three-dimensional lofting device is a Leica TS16 lofting robot.

[0039] During construction, the 3D layout device is set up at the calibrated benchmark points and leveled, oriented, and calibrated. Then, the 3D coordinates of multiple target positioning points are imported into the 3D layout device. The 3D layout device automatically calculates the corresponding horizontal and vertical angles based on the 3D coordinates of each target positioning point and adjusts the laser projection direction, so that the 3D layout device projects laser points corresponding to each target positioning point onto the top surface of the structure.

[0040] Each laser point is used to determine the designed fixed position of the corresponding post-installed embedded part 3. Specifically, the laser point can serve as the installation center point of the corresponding post-installed embedded part 3, as the anchor bolt hole reference point, or as the boundary positioning point of the post-installed embedded part 3. When the laser point is used as the installation center point, the center position of the post-installed embedded part 3 is determined based on the laser point; when the laser point is used as the anchor bolt hole reference point, the drilling position of the chemical anchor is determined based on the laser point; when the laser point is used as the boundary positioning point, the edge position or installation direction of the post-installed embedded part 3 is controlled based on the laser point.

[0041] While projecting laser points, the 3D layout device calculates the Z-axis height difference between the top surface of the structure where each laser point is located and the corresponding target positioning point. Since the top surface of the structure is usually uneven or has local construction deviations, by calculating the Z-axis height difference for each target positioning point, the length of the subsequent vertical square tube 2 can be matched with the actual height of the corresponding installation position.

[0042] S3. Preparation of vertical square tubes 2: Based on the height difference in each Z direction, subtract the thickness of the corresponding post-embedded part 3 to obtain the cutting length of each vertical square tube 2, and cut each vertical square tube 2 according to the corresponding cutting length. Specifically, for any target positioning point, the cutting length of its corresponding vertical square tube 2 satisfies the following relationship: Vertical square tube 2-cut length = corresponding Z-axis height difference The thickness of the corresponding rear embedded part is 3.

[0043] For example, if the height difference in the Z direction corresponding to a certain target positioning point is 2356mm and the thickness of the rear embedded part 3 is 8mm, then the cutting length of the vertical square tube 2 corresponding to the target positioning point is 2348mm.

[0044] Before cutting each vertical square tube 2, the target positioning point, corresponding laser point, corresponding Z-axis height difference, and corresponding cutting length are numbered and matched. For example, the target positioning points are numbered sequentially as P1, P2, P3, etc., and the corresponding laser points, post-embedded parts 3, Z-axis height differences, cutting lengths of vertical square tube 2, and the cut vertical square tube 2 all use the same number. During installation, the cut vertical square tube 2 is installed between the corresponding post-embedded parts 3 and the horizontal keel frame 1 according to the number. This avoids misinstallation, mixing, or omission of multiple vertical square tubes 2 due to different lengths.

[0045] In this embodiment, the vertical square tube 2 is preferably a hot-dip galvanized square tube with a cross-sectional specification of 80mm×60mm×4mm. Hot-dip galvanized square tubes have good corrosion resistance and structural strength, which can meet the load-bearing and durability requirements of the irregular metal ceiling panel 4 keel.

[0046] S4. Fix the rear embedded parts 3: Fix multiple rear embedded parts 3 to the top surface of the structure corresponding to each laser point.

[0047] In this embodiment, the post-embedded part 3 is a rectangular steel plate. Preferably, the rectangular steel plate has dimensions of 100mm × 100mm × 8mm. The rectangular steel plate has regular boundaries, which facilitates the determination of its installation center, anchor bolt hole position, or boundary position based on the laser point.

[0048] When installing the post-installed embedded part 3, first determine the fixing position of the rectangular steel plate according to the laser point, and then drill holes on the top surface of the structure. After drilling, clean the dust and debris in the holes, and then insert the chemical anchors. After the chemical anchors have reached the curing strength, install the rectangular steel plate on the chemical anchors and tighten the nuts to make the rectangular steel plate fit and fix it to the top surface of the structure.

[0049] Preferably, the chemical anchor is an M12×160 chemical anchor. Using chemical anchors to fix the post-installed embedded part 3 meets the post-installation requirements after the main structure is completed, allowing the post-installed embedded part 3 to be flexibly arranged on the top surface of the structure according to the design shape of the irregular metal ceiling panel 4. The post-installed embedded part 3 uses a 100mm×100mm×8mm rectangular steel plate and is fixed to the top surface of the structure using M12×160 chemical anchors.

[0050] S5. Preparation of horizontal keel frame 1: The horizontal square tubes are pre-assembled into horizontal keel frame 1 on the ground according to the design shape of the irregular metal ceiling panel 4.

[0051] Specifically, based on the design of the irregularly shaped metal ceiling panel 4, the outline of the horizontal keel frame 1 is laid out on the ground. Multiple horizontal square tubes are arranged according to the outline and welded together to form the horizontal keel frame 1 after being positioned with the assistance of limiting components. The limiting components can be positioning blocks, limiting clamps, corner brackets, jigs, or temporary limiting components, used to restrict the position, angle, spacing, or outline boundary of the horizontal square tubes.

[0052] By using positioning devices to assist in positioning, the horizontal square tube can be kept in a predetermined position before welding, avoiding errors caused by manual placement. At the same time, during the welding process, the positioning devices can reduce the contour deviation of the horizontal square tube caused by heating, slippage or rotation.

[0053] In this embodiment, the horizontal square tube is preferably an 80mm×60mm×4mm hot-dip galvanized square tube. The horizontal keel frame 1 may include arc-shaped control sections, broken-line control sections, curved surface control sections, or straight connection sections to adapt to different design shapes of the irregular metal ceiling panel 4. After the horizontal square tubes are pre-assembled on the ground, a horizontal keel frame 1 with multiple connection positions is formed, and each connection position corresponds one-to-one with a target positioning point. In one embodiment, the following features and effects are described.

[0054] S6. Overall assembly and molding: The horizontal keel frame 1 is hoisted to the design height, and the upper ends of each vertical square tube 2 are connected to the corresponding post-embedded parts 3, and the lower ends of each vertical square tube 2 are connected to the horizontal keel frame 1 to form an overall keel structure that matches the design shape of the irregular metal ceiling panel 4.

[0055] Specifically, the pre-assembled horizontal keel frame 1 is hoisted to the designed installation height using hoisting equipment. During the hoisting process, multiple connection points on the horizontal keel frame 1 are aligned with the lower installation positions of each vertical square tube 2. Subsequently, according to the aforementioned numbering, each vertical square tube 2 is positioned between the corresponding post-embedded part 3 and the horizontal keel frame 1.

[0056] The upper end of each vertical square tube 2 is connected to the corresponding post-embedded part 3, and the lower end of each vertical square tube 2 is connected to the horizontal keel frame 1. Preferably, the upper end of the vertical square tube 2 is fully welded to the post-embedded part 3, and the lower end of the vertical square tube 2 is fully welded to the horizontal keel frame 1. Further, the weld height of the fully welded connection is 5mm to 8mm. After the full weld connection, the multiple post-embedded parts 3, the multiple vertical square tubes 2, and the horizontal keel frame 1 together form an integral keel structure.

[0057] In this overall keel structure, the length of each vertical square tube 2 is determined according to the Z-direction height difference of the corresponding point. The outline of the horizontal keel frame 1 is pre-formed on the ground according to the design shape of the irregular metal ceiling panel 4. Therefore, the accuracy of the vertical support height and the horizontal shape outline can be guaranteed at the same time.

[0058] S7. Verify the overall keel structure: After the overall keel structure is formed, use a three-dimensional layout device or total station to verify the XY plane position and Z-axis elevation of the overall keel structure.

[0059] Specifically, the contour control points on the horizontal keel frame 1, the connection points of the vertical square tubes 2, or other key nodes are selected as verification points. The XY plane coordinates and Z-axis elevation of each verification point are measured using a three-dimensional layout device or a total station, and compared with the design coordinates. When the verification results meet the design allowable deviation requirements, the overall keel structure installation is completed; when there are deviations in the local position, they are corrected before the installation of the irregular metal ceiling panels 4.

[0060] Through the above steps, this embodiment can achieve comprehensive control over the position of the post-embedded part 3, the length of the vertical square tube 2, and the shape of the horizontal keel frame 1 before the installation of the irregular metal ceiling panel 4, thus avoiding the impact of uneven top surface, vertical square tube 2 length error, irregular contour positioning deviation, and on-site scattered assembly error accumulation on the installation of the ceiling panel.

[0061] Example 2 The laser point is used as the reference point for the anchor bolt hole position of the post-embedded part 3.

[0062] Specifically, after the laser point is projected by the three-dimensional layout device, the center position of the post-embedded part 3 is no longer determined by the laser point, but is directly used as the drilling reference point for the chemical anchor. The construction personnel drill holes on the top surface of the structure according to the laser point. After drilling, the chemical anchor is inserted, and then a rectangular steel plate is placed on the chemical anchor and fixed.

[0063] This method reduces the need for secondary measurements from the center point to the anchor bolt hole, minimizing hole position deviations caused by manual marking or point rotation. This implementation is particularly suitable for situations with a large number of post-installed embedded parts 3, densely packed anchor bolt holes, or where repeated marking is inconvenient at the construction site.

[0064] Example 3 The laser point is used as the boundary positioning point of the post-embedded part 3.

[0065] Specifically, the three-dimensional layout device calculates the horizontal and vertical angles based on the three-dimensional coordinates of the target positioning point, and then projects the laser point to the boundary position of the post-embedded part 3. Construction personnel determine the outer edge or corner position of the rectangular steel plate based on this boundary positioning point, and adjust the installation direction of the rectangular steel plate accordingly.

[0066] When using this method, the boundary position and installation orientation of the post-installed embedded part 3 can be controlled, avoiding rotational deviation of the rectangular steel plate or edges exceeding the design range during installation. This implementation method is suitable for situations where the post-installed embedded part 3 needs to maintain a specific orientation with the welding surface of the vertical square tube 2, or where there are space constraints such as pipelines or structural boundaries near the post-installed embedded part 3.

[0067] Example 4 The ground pre-installation of the horizontal keel frame 1 adopts the frame limiting method.

[0068] Specifically, a jig corresponding to the design shape of the irregularly shaped metal ceiling panel 4 is set on the ground, and the jig has multiple limiting parts. Each limiting part corresponds to the arc segment, broken line segment, curved surface control segment, or straight line segment of the horizontal keel frame 1. After the horizontal square tube is placed on the jig, its position and direction are restricted by the limiting parts of the jig, and then it is welded and fixed.

[0069] The use of a jig for positioning can improve the repeatability accuracy of the horizontal keel frame 1, which is especially suitable for ceiling projects with multiple identical or similar irregularly shaped units in the same area. The jig can also reduce the movement or deformation of the horizontal square tubes during welding, so that the horizontal keel frame 1 has a stable overall profile before hoisting.

[0070] Example 5 After the overall assembly is completed, a second verification and deviation correction are carried out.

[0071] Specifically, after the vertical square tubes 2 are connected to the post-installed embedded parts 3 and the horizontal keel frame 1, a three-dimensional layout device or a total station is used to verify several key points of the overall keel structure. The key points include the outline control points of the horizontal keel frame 1, the lower end connection points of the vertical square tubes 2, and the corresponding positions of the joints of the irregular metal ceiling panels 4.

[0072] When the XY plane position or Z-axis elevation obtained during verification exceeds the allowable deviation, the corresponding position is corrected. After correction, it is verified again until the overall keel structure meets the installation accuracy requirements of the irregular metal ceiling panel 4. This method can form a closed-loop construction control process.

[0073] The keel installation method for the irregular-shaped metal ceiling panel 4 provided in this embodiment determines the target positioning point by using the finished surface of the irregular-shaped metal ceiling panel 4 as a reference, determines the installation position of the post-embedded part 3 using a three-dimensional layout device and measures the height difference in the Z direction, and then prepares the vertical square tube 2 according to the Z-direction height difference. At the same time, the horizontal square tube is prefabricated into a horizontal keel frame 1 on the ground and hoisted and connected as a whole. This method can simultaneously control the planar position of the post-embedded part 3, the length of the vertical square tube 2, and the shaping accuracy of the horizontal keel frame 1. As a result, it can reduce the accumulation of errors caused by unevenness of the top surface of the structure, error in the length of the vertical square tube 2, scattered assembly on site, and multiple adjustments, and improve the consistency of the panel joints, surface flatness, and shape reproduction of the irregular-shaped metal ceiling panel 4.

[0074] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A method for installing irregularly shaped metal ceiling panel keel, characterized in that, Includes the following steps: Determine target positioning points. Based on the design of the irregular metal ceiling panel (4), determine multiple target positioning points. The target positioning points correspond to the lower installation positions of multiple vertical square tubes (2). Each target positioning point is formed by offsetting the finished surface of the irregular metal ceiling panel (4) by a preset distance along the direction towards the top surface of the structure. Lofting and positioning, and measuring the height difference, inputting the three-dimensional coordinates of each target positioning point into a three-dimensional lofting device, the three-dimensional lofting device projecting laser points corresponding to each target positioning point onto the top surface of the structure, and calculating the Z-axis height difference between the position of each laser point on the top surface of the structure and the corresponding target positioning point; Prepare vertical square tubes (2), and subtract the thickness of the corresponding post-embedded parts (3) according to the height difference of each Z direction to obtain the cutting length of each vertical square tube (2), and cut each vertical square tube (2) according to the corresponding cutting length. Fix the rear embedded parts (3) and fix the multiple rear embedded parts (3) to the top surface of the structure corresponding to each laser point respectively; Prepare a horizontal keel frame (1). The horizontal square tubes are pre-assembled into a horizontal keel frame (1) on the ground according to the design shape of the irregular metal ceiling panel (4). The entire assembly is formed by hoisting the horizontal keel frame (1) to the designed height, connecting the upper ends of each vertical square tube (2) to the corresponding post-embedded parts (3), and connecting the lower ends of each vertical square tube (2) to the horizontal keel frame (1) to form an overall keel structure that matches the design of the irregular metal ceiling panel (4).

2. The method for installing irregularly shaped metal ceiling panel keel according to claim 1, characterized in that, When determining multiple target positioning points, the outline control points of the horizontal keel frame (1) are determined according to the arc, zigzag or curved design of the irregular metal ceiling panel (4), and the outline control points are used as the target positioning points at the lower end of the corresponding vertical square tube (2).

3. The method for installing irregularly shaped metal ceiling panel keel according to claim 1, characterized in that, The three-dimensional layout device automatically calculates the corresponding horizontal and vertical angles based on the three-dimensional coordinates of each target positioning point, and adjusts the laser projection direction so that each laser point is projected to the designed fixed position of the corresponding rear embedded part (3).

4. The method for installing irregularly shaped metal ceiling panel keel according to claim 3, characterized in that, Each laser point is the installation center point, anchor bolt hole reference point, or boundary positioning point of the corresponding post-embedded part (3).

5. The method for installing irregularly shaped metal ceiling panel keel according to claim 1, characterized in that, The preset distance is determined based on the cross-sectional dimensions of the horizontal square tube, the thickness of the special-shaped metal ceiling panel (4), and the installation and operation space; the preset distance is the sum of the cross-sectional height of the horizontal square tube, the thickness of the special-shaped metal ceiling panel (4), and the dimensions of the installation and operation space.

6. The method for installing irregularly shaped metal ceiling panel keel according to claim 1, characterized in that, Before cutting each of the vertical square tubes (2), the target positioning points, corresponding laser points, corresponding Z-axis height differences and corresponding cutting lengths are numbered and matched, and the cut vertical square tubes (2) are installed between the corresponding rear embedded parts (3) and the horizontal keel frame (1) according to the number.

7. The method for installing irregularly shaped metal ceiling panel keel according to claim 1, characterized in that, The rear embedded part (3) is a rectangular steel plate, which is fixed to the top surface of the structure by chemical anchors.

8. The method for installing irregularly shaped metal ceiling panel keel according to claim 1, characterized in that, The horizontal square tube is welded to form the horizontal keel frame (1) after being positioned on the ground with the assistance of limiting components.

9. The method for installing irregularly shaped metal ceiling panel keel according to claim 8, characterized in that, The upper end of the vertical square tube (2) is fully welded to the rear embedded part (3), and the lower end of the vertical square tube (2) is fully welded to the horizontal keel frame (1).

10. The method for installing irregularly shaped metal ceiling panel keel according to claim 1, characterized in that, After the overall keel structure is formed, a three-dimensional layout device or a total station is used to verify the XY plane position and Z-axis elevation of the overall keel structure.

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