Construction method for multi-curved-surface suspended ceiling in tall and large space

Abstract

The invention relates to the technical field of suspended ceiling construction, in particular to a high and large space multi-curved-surface suspended ceiling construction method, and a multi-curved-surface suspended ceiling comprises a suspended ceiling steel structure keel, an adjustable suspension component and a plurality of suspended ceiling units with different curved surfaces, and the suspended ceiling units are assembled below the suspended ceiling steel structure keel through the adjustable suspension component. Each suspended ceiling unit is formed by sequentially connecting a plurality of suspended ceiling grids; the construction method comprises the following steps of three-dimensional scanning of the ceiling steel structure keel, modeling, deformation remeasurement, erection of the movable multifunctional operation platform, installation and adjustment of the adjustable suspension component, assembly of the ceiling grid, hoisting of the ceiling grid, positioning remeasurement and accumulative error adjustment. Through staged measurement and rechecking, the construction precision of the multi-curved-surface suspended ceiling is improved; the ceiling units below the ceiling steel structure keel and the adjustable suspension components are installed through the movable multifunctional operation platform, and the construction efficiency of the ceiling in the high and large space is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of suspended ceiling construction, and in particular relates to a method for constructing a suspended ceiling with multiple curved surfaces in a large space. Background Art

[0002] With the rise of large-scale transportation infrastructure projects, various airport stations are required to be uniquely designed and have cultural heritage as landmark buildings. In interior design, the multi-curved ceiling system in large spaces has beautiful and varied shapes, strong visual impact, and can better integrate cultural concepts and regional characteristics. However, the construction of multi-curved ceilings in large spaces has always been the focus of research in the construction industry. How to accurately, efficiently, simply and quickly construct the ceiling system to achieve the design effect is an important topic in the research and development of interior decoration projects. Summary of the invention

[0003] In view of the problems in the above-mentioned prior art, the present invention proposes a method for constructing a multi-curved ceiling in a tall space, wherein the multi-curved ceiling comprises a ceiling steel structure keel, an adjustable suspension component, and a plurality of ceiling units with different curves assembled under the ceiling steel structure keel through the adjustable suspension component, wherein each ceiling unit is connected in sequence by a plurality of ceiling grids; the above-mentioned construction method comprises the following steps: Step 1: Use a high-precision 3D laser scanner to perform 3D scanning on the installed ceiling steel structure keel, model the point cloud data obtained by the scanning, and generate a keel model; Step 2: Based on the keel model, a multi-curved ceiling 3D model is constructed that matches the position and size of the actual ceiling steel structure keel on site; the multi-curved ceiling 3D model is split according to a plurality of ceiling units with different curves, and the ceiling grid of each ceiling unit and the adjustable suspension components connected thereto are numbered to generate a unique location information QR code; Step 3: Select the control points of the ceiling coordinate axis grid, generate a three-dimensional coordinate system according to the keel model, and export it as a basis for checking the deformation of the ceiling steel structure keel during the construction process; Step 4: Lofting is performed based on the plane coordinate data of the ceiling lofting points derived from the multi-surface ceiling three-dimensional model, and the lofting points are marked at the bottom of the ceiling steel structure keel; and the adjustable suspension components are installed based on the positions of the lofting points; Step 5, assemble the ceiling grid of the ceiling unit; Step 6: Transfer the assembled ceiling grid units to the movable multifunctional operating platform, and connect each ceiling unit to the corresponding adjustable suspension member using the movable multifunctional operating platform.

[0004] Furthermore, there are multiple high-precision three-dimensional laser scanners installed at preset target positions to form multiple scanning sites; the high-precision three-dimensional laser scanners at the multiple scanning sites perform three-dimensional scanning on the ceiling steel structure keel, obtain the position information of the ceiling steel structure keel, and form multiple point cloud data.

[0005] Furthermore, a high-precision 3D laser scanner is used to perform 3D scanning on the installed ceiling steel structure keel, and the point cloud data obtained by the scanning is modeled to generate a keel model, including: The point cloud data of each scanning site is registered, and then the registered point cloud data of all scanning sites are merged to form an original point cloud, and the original point cloud is georeferenced; Refine the original point cloud into a surface model; The keel model is generated by triangulating the neighboring points of the target point cloud in the surface model.

[0006] Furthermore, the adjustable suspension component includes a fastening ring bolt, a U-groove, and a steel plate; the fastening ring bolt clamp is connected to the ceiling steel structure keel, the U-groove is suspended and connected to the bottom of at least two fastening ring bolts, the steel plate is arranged on the top of the U-groove, and the steel plate is connected to the ceiling grille of the ceiling unit.

[0007] Further, after performing lofting according to the plane coordinate data of the ceiling lofting points derived from the multi-surface ceiling three-dimensional model and marking the lofting points at the bottom of the ceiling steel structure keel, the method further includes: If the center point of the steel plate of the adjustable suspension component is not on the same center line as the setting out point, adjust the position of the fastening ring bolt until the center point of the steel plate is on the same center line as the setting out point; If the elevation data of the center point of the steel plate is different from the elevation data derived from the multi-surface ceiling 3D model, adjust the height of the U-groove suspended at the bottom of the fastening ring bolt until the elevation data are the same; If the inclination angle of the U-groove is different from the inclination angle data exported from the multi-curved ceiling 3D model, adjust the matching length of the fastening ring bolts connected to the U-groove until the inclination angles are the same.

[0008] Furthermore, the ceiling grille includes transverse aluminum bars, longitudinal aluminum bars and edge aluminum bars; a plurality of transverse aluminum bars and a plurality of longitudinal aluminum bars are snap-connected to form a grille body; and the edge aluminum bars surround the grille body.

[0009] Furthermore, the four corner points and the four side midpoints of the ceiling grid are provided with fixing points; each fixing point is connected to the steel plate of the adjustable suspension component by means of screws.

[0010] Furthermore, each ceiling unit is connected to a corresponding adjustable suspension member by using a movable multifunctional operating platform, including: Use screws to connect the four corner fixing points of the ceiling grid to the adjustable suspension member; Use a high-precision 3D laser scanner suspended from the bottom of the ceiling steel structure keel to check whether the ceiling grids are aligned; If they are not aligned, adjust the screws until they are aligned, and use the screws to connect the fixing points at the midpoints of the four sides of the ceiling grid to the adjustable suspension member.

[0011] Furthermore, the movable multifunctional operating platform includes: a concrete pier foundation, a basic frame, a sliding track, a leveling base, a lower frame, a top deck, an upper frame, a traction mechanism, a wheel assembly and a supporting steel plate assembly; the basic frame is erected on the concrete pier foundation, the sliding track is laid on the basic frame, the lower frame is erected on the sliding track, and a leveling base is arranged between the lower frame and the sliding track, the top deck is laid on the lower frame, the upper frame is laid on the top deck, and a wheel assembly or a supporting steel plate assembly is installed at the bottom of the upper frame; a wheel assembly or a supporting steel plate assembly cooperating with the sliding track is installed at the bottom of the lower frame; the traction mechanism is used to tow the lower frame to move on the sliding track.

[0012] Furthermore, the multi-curved ceiling also includes a steel beam edging arranged on the periphery of the ceiling steel structure keel, and the method further includes: Adjust the in and out position of the steel beam hemming; Adjust the gap width between the steel beam edging and the ceiling unit.

[0013] The beneficial effects of the present invention are as follows: the steel structure keel of the ceiling is scanned and modeled by a high-precision 3D laser scanner, the ceiling units with different curved surfaces are split, the ceiling grid of each ceiling unit and the adjustable suspension components connected thereto are numbered, and a dedicated position information QR code is generated. By scanning the QR code, the construction site can quickly obtain the target installation position of the ceiling grid and the adjustable suspension components, thereby improving the installation efficiency; and a 3D coordinate system is generated according to the model, and is derived as a basis for verifying the deformation of the steel structure keel of the ceiling during the construction process, and the plane coordinate data of the ceiling lofting points derived from the model are used for lofting, and the adjustable suspension components are installed, and the steps are performed. The segment measurement and review is carried out to improve the construction accuracy of the multi-curved ceiling; the installation of each ceiling unit and the adjustable suspension component under the ceiling steel structure keel is carried out through a movable multi-functional operating platform. Compared with the traditional fixed operating platform, the movable multi-functional operating platform can be quickly moved to the target installation position under the ceiling grid and the adjustable suspension component, without the need to repeatedly disassemble and assemble the operating platform, thereby improving the construction efficiency of the large-space ceiling; the present invention provides an efficient and accurate construction method for the large-space complex multi-curved ceiling with high-precision requirements, which shows a magnificent and shocking visual effect through the complex multi-curved ceiling, realizes the design concept and saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the process structure of the large space multi-curved ceiling construction method provided by the present invention.

[0015] Figure 2 It is a schematic diagram of the local structure of the multi-curved ceiling provided in an embodiment of the present invention.

[0016] Figure 3 for Figure 2 Schematic diagram of the side structure.

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of the suspended ceiling steel structure keel provided in an embodiment of the present invention.

[0018] Figure 5 It is a structural schematic diagram of a ceiling grid of a ceiling unit provided in an embodiment of the present invention.

[0019] Figure 6 Schematic diagram of a movable multifunctional operating platform provided in an embodiment of the present invention.

[0020] Figure 7 for Figure 6 Schematic diagram of the structure after the supporting steel plate assembly at the bottom of the middle and upper frame is switched to a wheel assembly.

[0021] Figure 8 for Figure 6 Schematic diagram of the structure in which the wheel assembly at the bottom of the middle and lower frame replaces the supporting steel plate assembly.

[0022] Fig. 9 for Figure 6 Schematic diagram of the structure with multiple sliding tracks laid on the middle foundation frame.

[0023] Fig.10 It is a schematic diagram of the structure of a multi-curved ceiling provided in an embodiment of the present invention.

[0024] In the figure: 1-ceiling steel structure keel; 1-1-main keel; 1-2-secondary keel; 2-fastening ring bolt; 3-U groove; 4-steel plate; 5-ceiling grille; 5-1-transverse aluminum bar; 5-2-longitudinal aluminum bar; 5-3-edge aluminum bar; 5-4-screw; 6-fixing point; 7-movable multi-functional operating platform; 71-concrete pier foundation; 72-foundation frame; 73-sliding track; 74-leveling bottom support; 75-lower frame; 76-top deck; 77-upper frame; 78-traction mechanism; 79-wheel assembly; 710-support steel plate assembly. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] like Fig.10 As shown, the multi-curved ceiling of the present invention includes a ceiling steel structure keel 1, an adjustable suspension component, and a plurality of ceiling units with different curves assembled below the ceiling steel structure keel 1 through the adjustable suspension component, and each ceiling unit is connected in sequence by a plurality of ceiling grids 5.

[0027] like Figure 1 The method for constructing a multi-curved ceiling in a large space includes the following steps: S1: 3D scanning and mapping of steel structure. Specifically, it includes: installing a high-precision 3D laser scanner at a preset target position, which can be the inside of the ceiling steel structure keel 1 and a certain range outside the ceiling steel structure keel 1, rotating the laser to scan the surrounding environment, and performing a 3D scan on the existing ceiling steel structure keel 1 that has been installed, obtaining the position information of the ceiling steel structure keel 1, and forming point cloud data. The ceiling steel structure keel 1 can also be called a steel structure.

[0028] Specifically, a high-precision 3D laser scanner is used to perform a 3D scan of the suspended ceiling steel structure keel 1, and the obtained point cloud data is imported into a computer. The point cloud data of each scanning site is registered (aligned with each other), checked and refined, and then the data of all scanning sites are merged into an original point cloud. The original point cloud is georeferenced by moving the polygon control points visible in the point cloud to the known positions obtained by polygon measurement. After georeferencing, the reference surface of the point cloud is the same as the reference point. Unnecessary data is deleted from the point cloud, including structural building elements (floors, walls and concrete columns), personnel, tools, machinery, construction materials, etc. Before generating the keel model, the point cloud is subdivided into smaller parts and refined by the algorithm of the computer software Trimble Real Works. During the refinement process, points that are not related to the geometry of the keel model are deleted, and then the point cloud is processed into a surface model. The 3D surface model of the keel model is then generated by triangulating (meshing) the neighboring points of the point cloud part in the surface model. Each triangle represents a surface of an object, and the sum of all triangles is the keel model of the suspended ceiling steel structure keel 1, which can also be regarded as a three-dimensional surface model of the suspended ceiling steel structure keel 1; S2: 3D modeling of suspended ceiling: On the basis of the keel model, a multi-curved suspended ceiling 3D model is constructed that matches the position and size of the actual suspended ceiling steel structure keel 1 on site. According to the production process, the adjusted multi-curved suspended ceiling 3D model is split into multiple suspended ceiling units with different curves to form a processing diagram of each suspended ceiling unit, and the suspended ceiling grid 5 of each suspended ceiling unit and the adjustable suspension components connected thereto are numbered to generate a unique location information QR code.

[0029] S3: Re-measurement of steel structure deformation: Select the control points of the ceiling coordinate axis grid, generate a three-dimensional coordinate system based on the three-dimensional model of the steel structure keel, and export it as the basis for verifying the deformation of the ceiling steel structure keel 1 during construction. The control point selection should be relatively fixed to facilitate observation of whether the on-site steel structure keel is deformed by comparing the modeling and then adjusting the ceiling components, and setting obvious markers.

[0030] S4: Setting up the movable operating frame: assembling the movable multifunctional operating platform 7.

[0031] S5: Installation and adjustment of adjustable suspension components: Lofting is performed based on the plane coordinate data (X axis, Y axis) of the ceiling lofting points derived from the multi-surface ceiling three-dimensional model, and the lofting points are marked at the bottom of the steel pipe of the ceiling steel structure keel 1 (also known as the steel structure roof). The adjustable suspension components include a fastening ring bolt 2, a U groove 3, and a steel plate 4. The fastening ring bolt 2 is connected to the ceiling steel structure keel 1 with a clamp, and the U groove 3 is suspended and connected to the bottom of at least two fastening ring bolts 2. The steel plate 4 is set at the top of the U groove 3, and the steel plate 4 is connected to the ceiling grille 5 of the ceiling unit.

[0032] First, preliminarily install the fastening ring bolt 2, U groove 3, and steel plate, and then do a review and fine-tuning. The specific steps are divided into three steps: ① Use a plumb bob to measure whether the center point (i.e., control point) of the steel plate 4 of the adjustable suspension component and the layout point are on the same center line. If not, adjust the position of the fastening ring bolt 2 to verify; ② Use a total station to measure whether the elevation data of the control point is the same as the elevation data exported from the multi-surface ceiling three-dimensional model. If different, adjust the length of the fastening ring bolt 2 (i.e., adjust the height of the U groove 3 suspended from the bottom of the fastening ring bolt 2) to verify; ③ Use a protractor to measure whether the inclination of the U groove 3 is the same as the inclination data exported from the model. If there is a difference, adjust the matching length of the fastening ring bolt 2 to verify.

[0033] S6: Assembly of ceiling grilles: An assembly platform for assembling the ceiling grilles 5 is set up. The number of assembly platforms can be appropriately increased according to the construction period requirements and site conditions. The splicing platform can be made of steel or wood. The splicing work should be carried out in a dry and dust-free environment as much as possible to ensure the construction quality. The ceiling grilles 5 of the ceiling unit are assembled on the assembly platform. The ceiling grille 5 includes a transverse aluminum bar 5-1, a longitudinal aluminum bar 5-2 and an edge aluminum bar 5-3; a plurality of transverse aluminum bars 5-1 and a plurality of longitudinal aluminum bars 5-2 are snap-connected to form a grille body; the edge aluminum bars 5-3 surround the grille body. The four corner points and the midpoints of the four sides of the ceiling grille 5 are provided with fixing points 6; each fixing point 6 is connected to the steel plate 4 of the adjustable suspension component by a screw 5-4.

[0034] S7: Grille hoisting, installation and positioning retest: Use a winch to hoist the ceiling grille 5 onto the movable multifunctional operating platform 7, and one person below is responsible for pulling the rope to prevent the ceiling grille 5 and the movable multifunctional operating platform 7 from colliding.

[0035] First, use screws 5-4 to connect the fixing points 6 of the four corners of the ceiling grid 5 to the adjustable suspension member; use a high-precision three-dimensional laser scanner suspended at the bottom of the ceiling steel structure keel 1 to check whether the ceiling grids 5 are aligned; if not, adjust the screws 5-4 until they are aligned; then use screws 5-4 to connect the fixing points 6 of the four midpoints of the ceiling grid 5 to the adjustable suspension member. The installation sequence of the ceiling grid 5 is from the center to the periphery, first install the standard plate in the center area, and then install the non-standard plates on the periphery.

[0036] S8: Cumulative error adjustment: The multi-curved ceiling also includes a steel beam edging arranged on the periphery of the ceiling steel structure keel 1. The gap width between the steel beam edging and the ceiling unit is adjusted by adjusting the in and out position of the steel beam edging to eliminate trace cumulative errors.

[0037] like Figure 4 As shown, the steel structure keel is a steel pipe made of cold-formed welded carbon steel hollow tube. The steel structure keel includes a main keel 1-1 and a secondary keel 1-2 connected longitudinally and transversely; the wall thickness of the main keel 1-1 is 12.7mm, the wall thickness of the secondary keel 1-2 is 6.4mm, and the surface is provided with a layer of foaming fire retardant paint, a layer of primer, and a layer of decorative topcoat.

[0038] like Figure 5 As shown, the ceiling grille 5 is made of aluminum alloy strips connected by buckles. The thickness of the aluminum alloy strips is 20mm, and the surface is sprayed with a layer of golden fluorocarbon with a thickness of 30μm. According to the QR code and number, the aluminum alloy strips and accessory materials are classified and stacked next to the splicing platform, and the ceiling grille 5 is spliced ​​one by one. The aluminum alloy strips are connected by bayonet. First, the internal horizontal aluminum strip 5-1 is positioned, and then the longitudinal aluminum strip 5-2 is inserted into the horizontal aluminum strip 5-1, and then the surrounding edge aluminum strips 5-3 are installed. Finally, the steel plate 4 is connected to the four corner points and the fixing points 6 of the four sides of the ceiling grille 5 with screws 5-4. After the splicing is completed, check the splicing effect of the ceiling unit. The ceiling surface should be flat, without obvious bumps and warping, all connectors should be installed firmly, without looseness, the gap between the aluminum strips is uniform, and the edge aluminum strips 5-3 are tightly connected.

[0039] like Figure 6-Figure 9The movable multifunctional operating platform shown in the figure comprises: a concrete pier foundation 71, a basic frame 72, a sliding track 73, a leveling support 74, a lower frame 75, a top deck 76, an upper frame 77, a traction mechanism 78, a wheel assembly 79 and a supporting steel plate assembly 710; the basic frame 72 is erected on the concrete pier foundation 71, the sliding track 73 is paved on the basic frame 72, the lower frame 75 is erected on the sliding track 73, and a leveling support 74 is arranged between the lower frame 75 and the sliding track 73. 4. The top deck 76 is paved on the lower frame 75, and the upper frame 77 is paved on the top deck 76. The bottom of the upper frame 77 is installed with a wheel assembly 79 or a supporting steel plate assembly 710 to realize the movement or fixation of the upper frame 77 on the top deck 76; the bottom of the lower frame 75 is installed with a wheel assembly 79 or a supporting steel plate assembly 710 that cooperates with the sliding track 73 to realize the movement or fixation of the lower frame 75 on the sliding track 73; the traction mechanism 78 is used to tow the lower frame 75 to move on the sliding track 73.

[0040] Before setting up the mobile multi-functional operating platform, the ground should be cleaned to ensure that the ground is flat and free of obstacles. In particular, the foundation of the outdoor area needs to be compacted to a compaction degree of 95% to 98% of the standard Proctor density, and the foundation drainage should be done well to ensure that the foundation area has a good drainage system.

[0041] Before setting up the mobile multi-functional operating platform, check all components to ensure that they are not damaged and function properly.

[0042] The concrete pier block foundation 71 is not only arranged indoors, but also arranged outdoors, so that the movable multifunctional operating platform can be flexibly moved indoors and outdoors.

[0043] The steps for setting up the movable multi-functional operating platform are as follows: First, construct the concrete pier foundation 71; After the construction of all concrete pier block foundations 71 is completed, a foundation frame 72 is set up on all concrete pier block foundations 71; the foundation frame 72 includes connected horizontal bars, longitudinal bars, vertical bars and diagonal braces. The foundation frame 72 has a large span, with one part located indoors and one part located outdoors. The indoor part is located below the multi-curved ceiling to be constructed.

[0044] After the construction of the basic frame 72 is completed, a plurality of sliding rails 73 are laid on the basic frame 72; the length direction of the sliding rails 73 is along the direction from indoor to outdoor. The plurality of sliding rails 73 are arranged in parallel. A part of each sliding rail 73 is located indoors, and a part is located outdoors.

[0045] The lower frame 75 is set up on the sliding track 73 by using a scaffold. The coverage plane of the lower frame 75 is larger than the area of ​​a ceiling unit, but smaller than the coverage plane of the base frame 72. The lower frame 75 is set up outdoors. When setting up the lower frame 75, a leveling bottom bracket 74 is provided between the lower frame 75 and the sliding track 73, and the top of the lower frame 75 is leveled by using the leveling bottom bracket 74. A supporting steel plate assembly 710 is installed between the leveling bottom bracket 74 and the sliding track 73, and the supporting steel plate assembly 710 is used to fix the sliding track 73 and the leveling bottom bracket 74, and the leveling bottom bracket 74 is fixedly connected to the lower frame 75, so as to ensure the stability of the lower frame 75.

[0046] When the lower frame 75 is assembled to the designed height, the top deck 76 is laid on the top of the lower frame 75, and a guardrail is installed on the top periphery of the lower frame 75. The top deck 76 includes a plurality of main beams, a plurality of secondary beams laid on the main beams, and wooden boards laid on the secondary beams.

[0047] An upper frame 77 is set up on the top deck 76, and a support steel plate assembly 710 is installed at the bottom of the upper frame 77. The support steel plate assembly 710 is fixedly connected to the top deck 76 and the upper frame 77 to ensure the stability of the upper frame 77. A construction platform and guardrail are laid on the top of the upper frame 77, and construction workers can install the ceiling unit on the construction platform.

[0048] When it is necessary to slightly adjust the position of the upper frame 77, use a jack to lift the upper frame 77 to a certain height, remove the supporting steel plate assembly 710 at the bottom of the upper frame 77, and install multiple wheel assemblies 79 at the bottom of the upper frame 77. Under the action of the multiple wheel assemblies 79, the upper frame 77 moves on the top deck 76 to adjust the position of the upper frame 77.

[0049] When the position of the upper frame 77 needs to be adjusted significantly, or the movable multifunctional operating platform needs to be switched between indoor and outdoor positions, the lower frame 75 is lifted to a certain height by a jack, the supporting steel plate assembly 710 at the bottom of the lower frame 75 is removed, and a plurality of wheel assemblies 79 are installed at the bottom of the lower frame 75, and cooperate with the sliding track 73, and the lower frame 75 is pulled to move on the sliding track 73 by a traction mechanism 78. The traction mechanism 78 includes a traction vehicle and a traction rope, and there are multiple traction ropes, one end of which is connected to the traction vehicle, and the other end is connected to the lower frame 75. When the lower frame 75 moves to the target position on the sliding track 73, the wheel assembly 79 at the bottom of the lower frame 75 is removed, and the supporting steel plate assembly 710 is reinstalled to fix the lower frame 75 on the sliding track 73.

[0050] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A method for constructing a multi-curved ceiling in a large space, characterized in that: The multi-curved ceiling comprises a ceiling steel structure keel, an adjustable suspension component, and a plurality of ceiling units with different curves assembled below the ceiling steel structure keel through the adjustable suspension component, each ceiling unit being connected in sequence by a plurality of ceiling grids; the construction method comprises the following steps: Step 1: Use a high-precision 3D laser scanner to perform 3D scanning on the installed ceiling steel structure keel, model the point cloud data obtained by the scanning, and generate a keel model; Step 2: construct a multi-curved ceiling three-dimensional model that matches the position and size of the actual ceiling steel structure keel on site based on the keel model; split the multi-curved ceiling three-dimensional model according to a plurality of ceiling units with different curves, number the ceiling grid of each ceiling unit and the adjustable suspension component connected thereto, and generate a unique location information QR code; Step 3, select the control points of the ceiling coordinate axis grid, generate a three-dimensional coordinate system according to the keel model, and export it as a basis for checking the deformation of the ceiling steel structure keel during the construction process; Step 4: Lofting is performed according to the plane coordinate data of the ceiling lofting points derived from the multi-curved ceiling three-dimensional model, and the lofting points are marked at the bottom of the ceiling steel structure keel; and the adjustable suspension component is installed based on the position of the lofting points; Step 5, assembling the ceiling grid of the ceiling unit; Step 6: Transfer the assembled ceiling grid units to a movable multifunctional operating platform, and connect each ceiling unit to the corresponding adjustable suspension member using the movable multifunctional operating platform; The movable multifunctional operating platform comprises: a concrete pier block foundation, a basic frame, a sliding track, a leveling bottom bracket, a lower frame, a top deck, an upper frame, a traction mechanism, a wheel assembly and a supporting steel plate assembly; the basic frame is erected on the concrete pier block foundation, the sliding track is paved on the basic frame, the lower frame is erected on the sliding track, and the leveling bottom bracket is arranged between the lower frame and the sliding track, the top deck is paved on the lower frame, the upper frame is paved on the top deck, and the wheel assembly or the supporting steel plate assembly is installed at the bottom of the upper frame; the wheel assembly or the supporting steel plate assembly matching with the sliding track is installed at the bottom of the lower frame; the traction mechanism is used to tow the lower frame to move on the sliding track; The steps for setting up the movable multifunctional operating platform are as follows: Construct concrete pier foundation; After the construction of all concrete pier block foundations is completed, a foundation frame is erected on the foundations of all concrete pier blocks; part of the foundation frame is located indoors and part is located outdoors; the indoor part is located below the multi-curved ceiling to be constructed; A plurality of sliding tracks are laid on the base frame; the length direction of the sliding tracks is from indoor to outdoor, and a part of each sliding track is located indoors and a part is located outdoors; The lower frame is set up on the sliding track; the lower frame is set up outdoors; when setting up the lower frame, a leveling bottom bracket is set between the lower frame and the sliding track, the top of the lower frame is leveled by the leveling bottom bracket, a supporting steel plate assembly is installed between the leveling bottom bracket and the sliding track, the sliding track and the leveling bottom bracket are fixedly connected by the supporting steel plate assembly, and the leveling bottom bracket is fixedly connected to the lower frame; When the lower frame is assembled to the designed height, the top deck is laid on the top of the lower frame; An upper frame is erected on the top deck, and a supporting steel plate assembly is installed at the bottom of the upper frame, which fixes the top deck and the upper frame together; a construction platform and guardrail are laid on the top of the upper frame, and construction workers install the ceiling unit on the construction platform; When the position of the upper frame needs to be slightly adjusted, the upper frame is lifted to a certain height by a jack, the supporting steel plate assembly at the bottom of the upper frame is removed, and multiple wheel assemblies are installed at the bottom of the upper frame, so that the upper frame moves on the top deck under the action of the multiple wheel assemblies to adjust the position of the upper frame; When the position of the upper frame needs to be adjusted significantly, or the movable multifunctional operating platform needs to be switched between indoor and outdoor positions, the lower frame is lifted to a certain height using a jack, the supporting steel plate assembly at the bottom of the lower frame is removed, and multiple wheel assemblies are installed at the bottom of the lower frame, and in cooperation with the sliding track, the lower frame is pulled to move on the sliding track using a traction mechanism; when the lower frame moves to the target position, the wheel assembly at the bottom of the lower frame is removed, and the supporting steel plate assembly is reinstalled to fix the lower frame.

2. The method for constructing a multi-curved ceiling in a large space according to claim 1, characterized in that: There are multiple high-precision three-dimensional laser scanners installed at preset target positions to form multiple scanning sites; the high-precision three-dimensional laser scanners at multiple scanning sites perform three-dimensional scanning on the ceiling steel structure keel, obtain the position information of the ceiling steel structure keel, and form multiple point cloud data.

3. The method for constructing a multi-curved ceiling in a large space according to claim 2, characterized in that: The method of using a high-precision three-dimensional laser scanner to perform three-dimensional scanning on the installed ceiling steel structure keel, modeling the point cloud data obtained by the scanning, and generating a keel model includes: Registering the point cloud data of each scanning site, merging the registered point cloud data of all scanning sites to form an original point cloud, and georeferencing the original point cloud; Refining the original point cloud into a surface model; The keel model is generated by triangulating neighboring points of the target point cloud in the surface model.

4. The method for constructing a multi-curved ceiling in a large space according to claim 1, characterized in that: The adjustable suspension component includes a fastening ring bolt, a U-groove, and a steel plate; the fastening ring bolt clamp is connected to the ceiling steel structure keel, the U-groove is suspended and connected to the bottom of at least two of the fastening ring bolts, the steel plate is arranged on the top of the U-groove, and the steel plate is connected to the ceiling grille of the ceiling unit.

5. The method for constructing a multi-curved ceiling in a large space according to claim 4, characterized in that: After performing lofting based on the plane coordinate data of the ceiling lofting points derived from the multi-curved ceiling three-dimensional model and marking the lofting points at the bottom of the ceiling steel structure keel, the method further includes: If the center point of the steel plate of the adjustable suspension member is not on the same center line as the setting out point, adjust the position of the fastening ring bolt until the center point of the steel plate is on the same center line as the setting out point; If the elevation data of the center point of the steel plate is different from the elevation data derived from the multi-curved ceiling three-dimensional model, the height of the U-groove suspended from the bottom of the fastening ring bolt is adjusted until the elevation data are the same; If the inclination angle of the U-groove is different from the inclination angle data derived from the multi-curved ceiling three-dimensional model, the matching length of the fastening annular bolt connected to the U-groove is adjusted until the inclination angles are the same.

6. The method for constructing a multi-curved ceiling in a large space according to any one of claims 1 to 4, characterized in that: The ceiling grille comprises transverse aluminum bars, longitudinal aluminum bars and edge aluminum bars; a plurality of the transverse aluminum bars and a plurality of the longitudinal aluminum bars are snap-connected to form a grille body; the edge aluminum bars surround the grille body.

7. The method for constructing a multi-curved ceiling in a large space according to claim 4 or 5, characterized in that: The four corner points and the four side midpoints of the ceiling grid are all provided with fixing points; each of the fixing points is connected to the steel plate of the adjustable suspension component by means of screws.

8. The method for constructing a multi-curved ceiling in a large space according to claim 7, characterized in that: The method of using the movable multifunctional operating platform to connect each ceiling unit with the corresponding adjustable suspension member comprises: Connect the four corner points of the ceiling grid to the adjustable suspension member using screws; Using a high-precision three-dimensional laser scanner suspended at the bottom of the ceiling steel structure keel to check whether the ceiling grids are aligned; If it is not aligned, adjust the screws until it is aligned, and use the screws to connect the fixing points of the midpoints of the four sides of the ceiling grid to the adjustable suspension member.

9. The method for constructing a multi-curved ceiling in a large space according to claim 1, characterized in that: The multi-curved ceiling also includes a steel beam edging arranged on the periphery of the ceiling steel structure keel, and the method further includes: Adjusting the in and out positions of the steel beam hemming; Adjust the gap width between the steel beam edge and the ceiling unit.

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