Construction method of curved surface suspended ceiling with multiple expansion joints arranged in combined mode

Abstract

The invention provides a construction method of a curved surface suspended ceiling with multiple expansion joints arranged in a combined mode. The construction method comprises the following steps that curved surface suspended ceiling keels are installed; a surface layer acoustic board is installed on the curved surface ceiling joist, and the surface layer acoustic board is disconnected at the annular true expansion joint and the vertical concealed joint expansion joint; the annular expansion joints are arranged on the two sides of the pre-installation position of the modeling lamp in the mode that the annular true expansion joints and the annular false expansion joints are combined, and vertical concealed joint expansion joints are arranged; and sound-absorbing paint is sprayed on the wall surface, back on to the curved surface ceiling joist, of the surface layer sound-absorbing plate. The construction method is used for construction of an integral curved surface suspended ceiling structure in a tall and large space, expansion joints in different forms are arranged, the true expansion joint, the false expansion joint and the blanking expansion joint are combined, the anti-cracking requirement of construction of a large integral curved surface suspended ceiling can be met, and meanwhile the overall decoration attractive effect can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building decoration, and in particular to a construction method for a curved ceiling in which a plurality of expansion joints are combined and arranged. Background Art

[0002] In recent years, with the rapid development of the construction industry, large public buildings (such as airports, theaters, and exhibition halls) have increasingly demanded higher aesthetics and artistic effects for their interior spaces. Curved ceilings, with their smooth lines and unique visual effects, are widely used in modern architectural design. However, during construction and use, large, monolithic curved ceilings often experience cracking and deformation due to factors such as temperature fluctuations, structural deformation, and material shrinkage, compromising both aesthetics and service life.

[0003] Traditional expansion joint setting methods usually only consider functionality and use a single type of expansion joint (such as open joints or caulking). Although this can alleviate material deformation, it is difficult to take into account the artistic effect of the integral ceiling. For example: True expansion joints (structural joints): Although they can effectively release stress, they are obvious in appearance and destroy the overall beauty of the ceiling; False expansion joints (decorative joints): They are only used for visual division and have no actual expansion function. They may still crack after long-term use. Hidden expansion joint (concealed joint): The gap is hidden through a special structure, but it requires extremely high construction precision and is relatively expensive.

[0004] Currently, the industry still faces technical challenges in integrating various expansion joints in long-span curved ceilings to ensure both structural stability and enhanced artistic expression. Therefore, an innovative construction method is urgently needed that combines true, false, and concealed expansion joints to address cracking while maintaining the overall aesthetics and artistry of the ceiling.

[0005] This patented technology aims to provide a construction method for combining multiple expansion joints in large-scale integral curved ceilings. By optimizing the layout, structure and decorative treatment of expansion joints, it takes into account both functional and aesthetic requirements and provides a better solution for modern architectural spaces. Summary of the Invention

[0006] In view of this, the present invention proposes a construction method for a curved ceiling in which multiple expansion joints are combined, aiming to solve the problem of cracking of existing integral ceilings.

[0007] The present invention proposes a construction method for a curved ceiling with a combination of multiple expansion joints, the construction method comprising the following steps: a curved keel installation step, which is to install the curved ceiling keel; a surface sound-absorbing board installation step, which is to install the surface sound-absorbing board on the curved ceiling keel, and the surface sound-absorbing board is disconnected at the circumferential true expansion joint and the vertical concealed expansion joint; on both sides of the pre-installation position of the shaped lamp, along the pre-installation curve arrangement direction of the shaped lamp, the circumferential expansion joint is arranged by combining the circumferential true expansion joint with the circumferential false expansion joint, and the vertical concealed expansion joint is arranged on the curved ceiling keel and the surface sound-absorbing board, so that the vertical concealed expansion joint and the circumferential true expansion joint are surrounded to form a ceiling curved surface structure less than or equal to a preset area; a surface spraying step, which is to spray sound-absorbing paint on the wall of the surface sound-absorbing board facing away from the curved ceiling keel after the surface sound-absorbing board is installed.

[0008] Furthermore, in the construction method of the curved ceiling in which the above-mentioned multiple expansion joints are combined, when installing the curved ceiling keel, an annular first expansion joint is reserved at the pre-installation position of the annular true expansion joint, so that the curved ceiling keel is disconnected at the pre-installation position of the annular true expansion joint to form a first section keel and a second section keel; in the said annular first expansion joint, a first C-type closing strip and a second C-type closing strip are respectively installed on the first section keel and the second section keel on both sides, the openings of the first C-type closing strip and the second C-type closing strip are arranged upward and there is a closing strip gap between the first C-type closing strip and the second C-type closing strip; wherein, the supporting wall of the first C-type closing strip is arranged flush with the supporting wall of the first section keel, the supporting wall of the second C-type closing strip is higher than the supporting wall of the second section keel by a preset height, and the first C-type closing strip and the second C-type closing strip are staggered up and down.

[0009] Furthermore, in the construction method of the curved ceiling in which the above-mentioned multiple expansion joints are combined, when installing the surface sound-absorbing panel, the surface sound-absorbing panel is installed on the supporting wall of the first section of the keel and the first C-shaped closing strip, and the surface sound-absorbing panel is installed on the supporting wall of the second section of the keel, so that the surface sound-absorbing panel has a surface annular gap at the annular first expansion joint, and the combination of the annular first expansion joint, the surface annular gap and the closing strip gap forms an annular true expansion joint.

[0010] Furthermore, in the construction method of the curved ceiling in which the above-mentioned multiple expansion joints are combined, in the surface spraying step, when spraying the circumferential true expansion joint, both the second C-shaped closing strip and the surface sound absorbing panel are sprayed.

[0011] Furthermore, in the construction method of the curved ceiling in which the above-mentioned multiple expansion joints are combined, when the surface sound-absorbing panel is installed, an annular second expansion gap is reserved at the pre-installation position of the annular false expansion joint, or after the surface sound-absorbing panel is installed, the surface sound-absorbing panel is cut to disconnect the surface sound-absorbing panel at the pre-installation position of the annular false expansion joint to form an annular second expansion gap; an "J"-shaped closing strip is installed at the annular second expansion gap so that the groove of the "J"-shaped closing strip serves as the annular false expansion joint, thereby completing the setting of the annular false expansion joint.

[0012] Furthermore, in the construction method of the curved ceiling in which the above-mentioned multiple expansion joints are combined, in the surface spraying step, when spraying the circumferential false expansion joint, the "X"-shaped closing strip and the surface sound-absorbing panel are both sprayed.

[0013] Furthermore, in the construction method of the curved ceiling in which the above-mentioned multiple expansion joints are combined, the concave part of the several-shaped closing strip is fixed to the curved ceiling keel with screws, and the two outer side walls of the several-shaped closing strip are bonded to the two surface sound-absorbing panels disconnected on both sides with structural adhesive.

[0014] Furthermore, in the construction method of the curved ceiling in which the above-mentioned multiple expansion joints are combined, foam rods are filled in the vertical concealed expansion joints and fixed with foam glue.

[0015] Furthermore, in the construction method of the curved ceiling with the above-mentioned multiple expansion joints, in the surface spraying step, when spraying the vertical hidden expansion joints, both the foam rod and the surface sound absorbing board are sprayed.

[0016] Furthermore, in the construction method of the curved ceiling in which the above-mentioned multiple expansion joints are combined, when the curved ceiling and the surface sound-absorbing panels are installed, vertical concealed expansion joints are reserved at the pre-installed positions of the vertical concealed expansion joints.

[0017] The present invention provides a construction method for a curved ceiling with a combination of multiple expansion joints. By setting circumferential expansion joints on both sides of the pre-installation position of the shaped lamps and along the pre-installation curved arrangement direction of the shaped lamps, a combination of circumferential true expansion joints and circumferential false expansion joints is used to meet the overall aesthetic effect. Vertical concealed expansion joints are set on the curved ceiling keel and the surface sound-absorbing panel, so that the vertical concealed expansion joints and the circumferential true expansion joints are surrounded to form a ceiling curved surface structure that is less than or equal to a preset area, meeting the expansion joint setting requirements of large-area integral surface ceilings and avoiding cracks or damage to the ceiling surface. The construction method for a curved ceiling with a combination of multiple expansion joints is used for the construction of an integral curved ceiling structure for large spaces. By setting different types of expansion joints and combining true expansion joints, false expansion joints and invisible expansion joints, it can meet the requirements for preventing cracking in the construction of large integral curved ceilings, while improving the overall decorative and aesthetic effect and solving the problem of cracking in existing integral ceilings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings: Figure 1 A flowchart of a construction method for a curved ceiling with a combination of multiple expansion joints provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a curved ceiling incorporating multiple expansion joints according to an embodiment of the present invention; Figure 3 This is a rendering of a curved ceiling with a combination of multiple expansion joints provided by an embodiment of the present invention; Figure 4 A schematic structural diagram of a circumferential false expansion joint in a curved ceiling provided with a combination of multiple expansion joints according to an embodiment of the present invention; Figure 5 A schematic structural diagram of a circumferential true expansion joint in a curved ceiling provided with a combination of multiple expansion joints according to an embodiment of the present invention; Figure 6 A schematic structural diagram of a vertical concealed expansion joint in a curved ceiling in which multiple expansion joints are combined according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, unless there is a conflict, the embodiments of the present disclosure and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] See also Figure 1 , which is a flowchart of a construction method for a curved ceiling with multiple expansion joints provided by an embodiment of the present invention. As shown in the figure, the construction method includes the following steps: The curved keel installation step S1 is to install the curved ceiling keel.

[0021] Specifically, the keel of the integral curved ceiling, i.e., the curved ceiling keel 1, can be installed with the secondary purlins of the main steel structure using hanging angle steel and full-thread screws. The hanging angle steel can be L40*3mm, i.e., an equal-leg angle steel with a side width of 40mm and a thickness of 3mm, and the full-thread screw can be a full-thread screw with a diameter of 8mm.

[0022] Surface sound absorbing panel installation step S2, installing the surface sound absorbing panel on the curved ceiling keel, and the surface sound absorbing panel is disconnected at the circumferential true expansion joint and the vertical concealed expansion joint; on both sides of the pre-installation position of the shaped lamp, along the pre-installation curve arrangement direction of the shaped lamp, the circumferential expansion joint is set by combining the circumferential true expansion joint with the circumferential false expansion joint, and the vertical concealed expansion joint is set on the curved ceiling keel and the surface sound absorbing panel, so that the vertical concealed expansion joint and the circumferential true expansion joint are surrounded to form a ceiling curved structure less than or equal to a preset area.

[0023] Specifically, if Figures 4 to 6 As shown, the surface sound-absorbing panel 2 utilizes a 15mm particle sound-absorbing board. It is secured to the curved ceiling keel 1 using self-tapping screws 3, with the screw spacing no greater than 300mm. The curved ceiling keel 1 and the surface sound-absorbing panel 2 are additionally bonded using structural adhesive. When installing the surface sound-absorbing panel 2, it can first be bonded to the curved ceiling keel 1 using structural adhesive, and then secured to the curved ceiling keel 1 using self-tapping screws 3, with the screw spacing no greater than 300mm. The rear cavity of the surface sound-absorbing panel can be filled with 50mm thick, 48kg / m³ bulk density, hydrophobic glass wool, which can be a densely wrapped glass cloth.

[0024] In this embodiment, during the installation of the curved ceiling keel 1 and the surface sound absorbing board 2, the expansion joint can be set according to the actual situation, such as Figure 2 and Figure 3 As shown, in this embodiment, the curved ceiling is provided with shaped lamps arranged in a circular or arc shape. Circumferential expansion joints can be set on both sides of the pre-installation position of the shaped lamps along the pre-installation curved arrangement direction of the shaped lamps 4 by combining circumferential true expansion joints 5 with circumferential false expansion joints 6, and vertical concealed expansion joints 7 are set on the curved ceiling keel and the surface sound-absorbing board, so that the vertical concealed expansion joints 7 and the circumferential true expansion joints 5 are surrounded to form a ceiling curved surface structure that is less than or equal to the preset area to meet the expansion joint setting requirements. Of course, according to actual conditions, circumferential true expansion joints 5 or circumferential false expansion joints 6 can be selected on both sides of the pre-installation position of the shaped lamps. For example, circumferential true expansion joints 5 and circumferential false expansion joints 6 can be set on both sides of the pre-installation position of the shaped lamps, or circumferential false expansion joints 6 can be set on both sides. The preset area can be 500m 2 In this embodiment, according to the shaping effect of the overall large-space curved ceiling, in the ceiling space involving the position of the shaped lamps, a combination of circumferential true expansion joints and circumferential false expansion joints can be adopted, and the arrangement of the true and false expansion joints is consistent with the arrangement principles of the lamps and the overall shape to meet the overall aesthetic effect; and according to the shaping effect of the overall large-space curved ceiling, in the ceiling space not involving the position of the shaped lamps, vertical concealed expansion joints 7 are adopted, which are arranged longitudinally and transversely along the shaping space to meet the expansion joint setting requirements of the large-area integral surface layer ceiling and avoid cracks or damage to the ceiling surface; wherein, the curved surface formed by the circumferential true expansion joint 5 and the vertical concealed expansion joint 7 is not more than 500 m 2 The principle of setting. Figure 2 and Figure 3 In the figure, the green lines are vertical concealed expansion joints 7, the blue lines are circumferential false expansion joints 6, the light brown small round holes are modeling lamps 4, and the dark brown lines are circumferential true expansion joints 5.

[0025] Surface spraying step S3: After the surface sound absorbing board is installed, spraying sound absorbing paint on the wall surface of the surface sound absorbing board facing away from the curved ceiling keel.

[0026] Specifically, after the microparticle sound-absorbing panels are installed, a microparticle sound-permeable coating is applied to the surface of the panels by spraying to form a sound-absorbing coating layer 8, thereby creating a large, monolithic curved ceiling. The microparticle sound-permeable coating can be applied in one coat, followed by two coats of topcoat, i.e., one coat of primer and two coats of topcoat.

[0027] In this embodiment, the setting of the annular false expansion joint 6 is specifically as follows: when the surface sound absorbing panel 2 is installed, an annular second expansion gap is reserved at the pre-installation position of the annular false expansion joint 6, or after the surface sound absorbing panel 2 is installed, the surface sound absorbing panel 2 is cut to disconnect the surface sound absorbing panel 2 at the pre-installation position of the annular false expansion joint 6 to form an annular second expansion gap; an "X"-shaped closing strip 9 is installed at the annular second expansion gap, so that the groove of the "X"-shaped closing strip 9 serves as the annular false expansion joint, thereby completing the setting of the annular false expansion joint.

[0028] Specifically, first, Figure 4 As shown, the expansion joint can be cut according to the position of the annular false expansion joint 6 on the deepening diagram. After the overall curved ceiling is sealed, the surface sound-absorbing board 2 can be cut. The curvature of the cutting is consistent with the overall curved surface shape. The cutting width can be 20 mm and the depth can be 15 mm. The cutting depth is consistent with the thickness of the surface layer of the particle sound-absorbing board, that is, the surface sound-absorbing board 2 is cut at the position of the annular false expansion joint 6 to form an annular second expansion gap with a width of 20 mm; of course, the annular second expansion gap can also be reserved when the surface sound-absorbing board 2 is installed. Then, the installation of the several-shaped closing strip 9 is carried out. In order to ensure that the several-shaped closing strip 9 meets the curvature requirement, the several-shaped closing strip 9 can be cut in the middle every 100mm along the long strip direction, that is, the circumferential setting direction of the annular false expansion joint 6; when the several-shaped closing strip 9 is installed, the concave part of the several-shaped closing strip 9 and the base keel, that is, the curved ceiling keel 1, are fixed with self-tapping screws 3, and the spacing between the self-tapping screws 3 is 300mm. The outer part of the several-shaped closing strip 9, that is, the two outer side walls (such as Figure 4 The left and right outer walls (shown) are bonded to the two surface sound-absorbing panels 2 disconnected on either side using structural adhesive, ensuring full adhesion. After the "X"-shaped closing strip 9 is installed, the circumferential false expansion joint 6 is sprayed throughout. Specifically, during the surface spraying step, both the "X"-shaped closing strip 9 and the surface sound-absorbing panels 2 are sprayed when spraying the circumferential false expansion joint 6. When spraying the surface particulate sound-absorbing panels, the "X"-shaped closing strip 9 and the surface sound-absorbing panels 2 can be sprayed together to ensure a consistent surface finish. The spraying thickness can be 3mm. In other words, the "X"-shaped closing strip forms the circumferential false expansion joint 6, achieving an aesthetically pleasing effect.

[0029] In this embodiment, the setting of the annular true expansion joint is specifically as follows: Figure 5As shown, when installing the curved ceiling keel 1, a first annular expansion joint 51 is reserved at the pre-installation position of the annular true expansion joint 5, so that the curved ceiling keel 1 is broken at the pre-installation position of the annular true expansion joint to form a first section keel 101 and a second section keel 102; in the first annular expansion joint, a first C-shaped closing strip 10 and a second C-shaped closing strip 11 are respectively installed on the first section keel 101 and the second section keel 102 on both sides, the openings of the first C-shaped closing strip 10 and the second C-shaped closing strip 11 are both arranged upward and there is a closing strip gap between the first C-shaped closing strip 10 and the second C-shaped closing strip 11; wherein, the supporting wall of the first C-shaped closing strip 10 (such as Figure 4 The bottom wall shown in FIG) and the supporting wall of the first section keel 101 (as shown Figure 4 The bottom wall shown in FIG) is flush with the supporting wall of the second C-shaped closing strip 11 (as shown Figure 4 The bottom wall shown in FIG) is higher than the supporting wall of the second section keel 102 (as shown in FIG). Figure 4 The bottom wall shown in FIG) has a preset height, and the first C-shaped closing strip 10 and the second C-shaped closing strip 11 are staggered up and down; wherein the preset height can be determined according to actual conditions and can be greater than the width of the first C-shaped closing strip 10 (such as Figure 1 The height in the vertical direction as shown) is such that the first C-shaped closing strip 10 and the second C-shaped closing strip 11 are staggered up and down.

[0030] Specifically, first, a circumferential true expansion joint is reserved. According to the position of the circumferential expansion joint on the detailed drawing, when the overall curved ceiling base keel is installed, a 66mm wide circumferential first expansion joint 51 is reserved, and both the base keel and the surface panel are disconnected, that is, the curved ceiling keel 1 and the surface sound-absorbing panel 2 are both disconnected. Then, the expansion joint closing strip is installed; to ensure that the closing strip meets the curvature requirement, the first C-shaped closing strip 10 and the second C-shaped closing strip 11 can be cut in the middle every 100mm along the long strip direction; two C-shaped steel closing strips are used to form a true expansion joint, that is, the first C-shaped closing strip 10 and the second C-shaped closing strip 11 form a circumferential true expansion joint 5, the first C-shaped closing strip 10 and the second C-shaped closing strip 11 can both be C-shaped steel, and their dimensions are 30mm*8mm*1.5mm, that is, the height of the C-shaped steel is 30mm, the width is 8mm, and the thickness is 1.5mm. The first C-shaped closing strip 10 is flush with the supporting wall of the first section keel 101, that is, the left side closing strip is flush with the left side keel bottom wall, and the left side wall of the first C-shaped closing strip 10 is fixed to the right side wall of the first section keel 101 by welding, and is welded every 100mm; the supporting wall of the second C-shaped closing strip 11 (such as Figure 4 The bottom wall shown in FIG) is higher than the supporting wall of the second section keel 102 (as shown in FIG). Figure 4The preset height of the bottom wall shown is 10mm, that is, the right side closing strip is 10mm higher than the right side curved keel, and is fixed to the curved keel by welding, with welding every 100mm. The right side closing strip is 2mm higher than the left side closing strip. After the first C-type closing strip 10 and the second C-type closing strip 11, that is, the two closing strips, are installed, there is a gap between the two closing strips, that is, the first C-type closing strip 10 and the second C-type closing strip 11, which can be expanded and contracted. In other words, a true expansion joint is formed by the C-type closing strip, and circumferential true and false expansion joints are set. According to the shape effect of the overall large-space curved ceiling, the ceiling space involving the position of the shaped lamps adopts a combination of circumferential true expansion joints and false expansion joints. The arrangement of the true and false expansion joints is consistent with the arrangement principles of the lamps and the overall shape to meet the overall aesthetic effect.

[0031] In this embodiment, when installing the surface sound absorbing panel 2, the surface sound absorbing panel 2 is installed on the supporting wall of the first section keel 101 and the first C-shaped closing strip 10, and the surface sound absorbing panel 2 is installed on the supporting wall of the second section keel 102, so that the surface sound absorbing panel 2 has a surface annular gap at the first annular expansion joint 5, and the combination of the first annular expansion joint, the surface annular gap and the closing strip gap forms an annular true expansion joint. Specifically, the installation of the surface sound-absorbing panel at the circumferential true expansion joint is as follows: the surface sound-absorbing panel 2 and the curved ceiling keel 1 are fixed with self-tapping screws, and the screw spacing does not exceed 300mm. The surface sound-absorbing panel installed on the curved ceiling keel 1 is auxiliary bonded with structural adhesive. The left surface sound-absorbing panel and the C-shaped steel closing strip, that is, the first C-shaped closing strip 10, are fixed with screws. The right side of the surface sound-absorbing panel extends beyond the right side of the first C-shaped closing strip 10 and can extend beyond the C-shaped steel by 10mm. The right sound-absorbing panel is flush with the right curved keel.

[0032] In this embodiment, during the surface coating step, when spraying the circumferential true expansion joint 5, both the second C-shaped sealing strip 11 and the surface sound-absorbing panel 2 are sprayed. Specifically, the circumferential true expansion joint 5 is sprayed as a whole. When spraying the surface particulate sound-absorbing panel, the two sealing strips, namely the first C-shaped sealing strip 10 and the second C-shaped sealing strip 11, are sprayed together with the surface sound-absorbing panel 2 to form a sound-absorbing coating layer 8, ensuring a consistent surface effect. The spraying thickness is 3 mm.

[0033] In this embodiment, the setting of the vertical concealed seam expansion joint is specifically as follows: when the curved ceiling and the surface sound-absorbing panel are installed, a vertical concealed seam expansion joint 7 is reserved at the pre-installation position of the vertical concealed seam expansion joint; and a foam rod 13 is filled at the position of the vertical concealed seam expansion joint, and is bonded and fixed with foam glue 14; in the surface spraying step, when spraying the vertical concealed seam expansion joint, both the foam rod and the surface sound-absorbing panel are sprayed.

[0034] Specifically, the setting of the vertical concealed expansion joint 7 is as follows: first, Figure 6 As shown, the hidden expansion joints are reserved. According to the position of the hidden expansion joints on the detailed drawing, when the overall curved ceiling base keel is installed, a 20mm wide expansion joint is reserved according to the vertical curvature of the overall ceiling. Then, the foam rods are filled. After the installation of the surface sound-absorbing panels of the overall ceiling is completed, 20mm foam rods are filled in the reserved expansion joint positions and fixed with foam glue. Finally, the overall spraying is carried out. When spraying the surface particulate sound-absorbing panels, the foam rods 13 and the surface sound-absorbing panels 2 are sprayed together to form a sound-absorbing coating layer 8 to ensure the consistency of the overall surface effect. The overall surface has a retractable space to meet the functional effect of the expansion joint. In other words, a hidden expansion joint is formed by foam rods and foam glue to meet the requirements of expansion joint setting. In other words, the setting of vertical concealed expansion joints is based on the shaping effect of the overall large-space curved ceiling, and does not involve the ceiling space where the shaping lamps are located. Concealed expansion joints are used and set vertically and horizontally along the shaping space to meet the expansion joint setting requirements of large-area overall surface ceilings, avoiding cracks or damage in the ceiling surface.

[0035] In summary, the construction method for a curved ceiling with a combination of multiple expansion joints provided in this embodiment sets circumferential expansion joints by combining circumferential true expansion joints with circumferential false expansion joints on both sides of the pre-installation position of the shaped lamps and along the pre-installation curved arrangement direction of the shaped lamps, thereby meeting the overall aesthetic effect. Vertical concealed expansion joints are set on the curved ceiling keel and the surface sound-absorbing panels, so that the vertical concealed expansion joints and the circumferential true expansion joints form a ceiling curved surface structure that is less than or equal to a preset area, meeting the expansion joint setting requirements of large-area integral surface ceilings and avoiding cracks or damage to the ceiling surface. The construction method for a curved ceiling with a combination of multiple expansion joints is used for the construction of an integral curved ceiling structure in large spaces. By setting different types of expansion joints and combining true expansion joints, false expansion joints, and concealed expansion joints, it can meet the requirements for preventing cracking in the construction of large integral curved ceilings, while improving the overall decorative and aesthetic effect and solving the problem of cracking in existing integral ceilings.

[0036] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0037] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A construction method for a curved ceiling with multiple expansion joints, characterized in that: The steps include: Installation steps of curved keel, installation of curved ceiling keel; The surface sound absorbing panel installation step includes installing the surface sound absorbing panel on the curved ceiling keel, wherein the surface sound absorbing panel is disconnected at both the circumferential true expansion joint and the vertical concealed expansion joint; arranging circumferential expansion joints along the pre-installation curved arrangement direction of the shaped lamps on both sides of the pre-installation position of the shaped lamps by combining circumferential true expansion joints with circumferential false expansion joints, and arranging vertical concealed expansion joints on the curved ceiling keel and the surface sound absorbing panel, so that the vertical concealed expansion joints and the circumferential true expansion joints enclose a ceiling curved structure that is less than or equal to a preset area; The surface spraying step is to spray sound-absorbing paint on the wall surface of the surface sound-absorbing board facing away from the curved ceiling keel after the surface sound-absorbing board is installed.

2. The construction method of a curved ceiling with multiple expansion joints according to claim 1, characterized in that: When installing the curved ceiling keel, a first circumferential expansion joint is reserved at the pre-installation position of the circumferential true expansion joint, so that the curved ceiling keel is broken at the pre-installation position of the circumferential true expansion joint to form a first section keel and a second section keel; In the first annular expansion joint, a first C-shaped closing strip and a second C-shaped closing strip are respectively installed on the first section of the keel and the second section of the keel on both sides, the openings of the first C-shaped closing strip and the second C-shaped closing strip are arranged upward and there is a closing strip gap between the first C-shaped closing strip and the second C-shaped closing strip; wherein, the supporting wall of the first C-shaped closing strip is arranged flush with the supporting wall of the first section of the keel, the supporting wall of the second C-shaped closing strip is higher than the supporting wall of the second section of the keel by a preset height, and the first C-shaped closing strip and the second C-shaped closing strip are staggered up and down.

3. The construction method of a curved ceiling with multiple expansion joints according to claim 2, characterized in that: When installing the surface sound-absorbing panel, the surface sound-absorbing panel is installed on the supporting wall of the first section of the keel and the first C-shaped closing strip, and the surface sound-absorbing panel is installed on the supporting wall of the second section of the keel, so that the surface sound-absorbing panel has a surface annular gap at the first annular expansion joint, and the combination of the first annular expansion joint, the surface annular gap and the closing strip gap forms an annular true expansion joint.

4. The construction method of a curved ceiling with multiple expansion joints according to claim 3, characterized in that: In the surface layer spraying step, when spraying the circumferential true expansion joint, both the second C-shaped closing strip and the surface layer sound absorbing panel are sprayed.

5. The construction method of a curved ceiling with multiple expansion joints according to any one of claims 1 to 4, characterized in that: When the surface sound absorbing panel is installed, a second annular expansion gap is reserved at the pre-installation position of the annular false expansion joint, or after the surface sound absorbing panel is installed, the surface sound absorbing panel is cut to disconnect the surface sound absorbing panel at the pre-installation position of the annular false expansion joint to form the second annular expansion gap; An I-shaped closing strip is installed at the second annular expansion gap so that the groove of the I-shaped closing strip serves as an annular false expansion joint, thereby completing the setting of the annular false expansion joint.

6. The construction method of a curved ceiling with multiple expansion joints according to claim 6, characterized in that: In the surface layer spraying step, when spraying the circumferential false expansion joint, both the "X"-shaped closing strip and the surface layer sound absorbing panel are sprayed.

7. The construction method of a curved ceiling with multiple expansion joints according to claim 6, characterized in that: The concave portion of the shaped closing strip is fixed to the curved ceiling keel by means of screws, and the two outer side walls of the shaped closing strip are bonded to the two surface sound absorbing panels disconnected at both sides by means of structural adhesive.

8. The method for constructing a curved ceiling with multiple expansion joints according to any one of claims 1 to 4, characterized in that: Fill the vertical concealed expansion joints with foam rods and use foam glue to bond and fix them.

9. The construction method of a curved ceiling with multiple expansion joints according to claim 8, characterized in that: In the surface layer spraying step, when spraying the vertical concealed expansion joint, both the foam rod and the surface layer sound absorbing board are sprayed.

10. The construction method of a curved ceiling with multiple expansion joints according to any one of claims 1 to 4, characterized in that: When installing the curved ceiling and surface sound-absorbing panels, reserve vertical concealed seam expansion joints at their pre-installation positions.

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