A ring-shaped roof system on a steel structure and a construction method thereof

Abstract

A kind of annular roof system on steel structure and its construction method, including steel structure roof truss, vertical steel frame, lower layer steel framework and upper layer steel framework;Steel structure roof truss plane structure is annular, is connected on the floor of main body structure top;The horizontal section of vertical steel frame is annular, is arranged along the edge of circular hole;The plane structure of lower layer steel framework is annular, is arranged in the upper of steel structure roof truss;The top of lower layer steel framework and the inner side of vertical steel frame are equipped with profiled steel sheet layer, thermal insulation layer and roof waterproof layer;Sealing layer is laid in the bottom of lower layer steel framework, and sound-absorbing layer is filled in the top of sealing layer in lower layer steel framework;Upper layer steel framework includes tangent keel and annular keel;The top of upper layer steel framework is paved with UHPC veneer, and the outer side of vertical steel frame is equipped with decorative layer.The present application solves the technical problems of poor structural stability, complex construction process, great construction difficulty, imperfect hierarchical structure design of roof system and limited decorative effect in traditional technology.

Description

Technical Field

[0001] This invention belongs to the field of steel structure technology, specifically a ring roof system for steel structures and its construction method. Background Technology

[0002] This project involves the architectural structure of an acrobatic theater. The main body is constructed of steel, with a ring-shaped, zigzag roof. As a large-scale public cultural building, the acrobatic theater has extremely high requirements for its facade and roof design. Although many buildings utilize ring-shaped roofs in existing technologies, several problems remain in practical engineering applications: 1. Unreasonable structural layout: Existing ring-shaped roof systems often employ a segmented, spliced ​​construction, resulting in complex connections, poor structural integrity and stability, particularly in resistance to wind loads and vibrations. 2. Complex construction procedures and high precision requirements: Due to the characteristics of curved structures, the requirements for construction positioning and node connection are extremely high. Errors during construction can easily occur, leading to a decline in structural performance later. 3. Incomplete roof system hierarchical design: In traditional roof systems, waterproofing, insulation, and sound absorption functions often cannot be simultaneously achieved, making it difficult to meet the comfort and durability requirements of high-standard buildings. 4. Limited decorative effect: External decorative layers are mostly installed externally, which not only affects aesthetics but also presents many inconveniences in maintenance and replacement. Therefore, this project requires the design of a new steel structure ring roof system with a reasonable structural layout, convenient construction, and strong functional integration to meet the comprehensive requirements of modern architecture for safety, aesthetics, functionality, and construction efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a ring roof system on a steel structure and its construction method, in order to solve the technical problems of poor structural stability, complex construction procedures, high construction difficulty, imperfect hierarchical structure design of the roof system, and limited decorative effect in traditional technologies.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] A ring-shaped roof system on a steel structure is installed on the floor slab of the main structure, including a steel roof truss; a circular opening is pre-drilled in the middle of the floor slab; it also includes a vertical steel frame, a lower steel frame, and an upper steel frame; the steel roof truss has a ring-shaped planar structure and is connected to the floor slab at the top of the main structure; corbels are spaced at intervals on the top of the steel roof truss; there are multiple sets of corbels arranged in a ring direction; each set of corbels is spaced radially; the heights of the radially spaced corbels are not exactly the same, while the heights of the corresponding corbels in the ring direction are the same; the horizontal cross-section of the vertical steel frame is ring-shaped and is set along the edge of the circular opening, and the lower end of the vertical steel frame is connected to the floor slab through a lower embedded component, and the upper part of the vertical steel frame is connected to the steel roof truss through a connecting component; the lower steel frame has a ring-shaped planar structure and is set with... Above the steel roof truss, and connected to the upper part of the corbels, the lower steel frame is provided with a profiled steel sheet layer, an insulation layer, and a roof waterproofing layer in sequence from the inside out on the top of the lower steel frame and the inner side of the vertical steel frame. A sealing layer is laid at the bottom of the lower steel frame, and a sound-absorbing layer is filled inside the lower steel frame, at the top of the sealing layer. The upper steel frame includes tangential keels and circumferential keels. A first limiting member is provided at the top of the corbels. The tangential keels are correspondingly arranged on the top of a set of corbels and connected to the first limiting member. Second limiting members are radially spaced at the top of the tangential keels. Multiple sets of circumferential keels are arranged radially, with each set forming a circle around the perimeter. UHPC decorative panels are laid on the top of the upper steel frame, and a decorative layer is provided on the outer side of the vertical steel frame.

[0006] Preferably, the circumferential keel includes circumferential keel units and short rods; there is a set of circumferential keel units arranged circumferentially; the short rods are connected between adjacent circumferential keel units and are fixedly connected to the second limiting member; the end of the circumferential keel unit is connected to the bottom of the corresponding short rod; the circumferential keel unit is a straight rod or a bent rod; when the circumferential keel unit is a bent rod, the circumferential keel unit includes a horizontal section in the middle and inclined sections at both ends of the horizontal section.

[0007] Preferably, the lower embedded component includes a lower embedded plate and a lower embedded reinforcement bar; the lower embedded plate and the lower embedded reinforcement bar are embedded in the floor slab near the edge, and the lower embedded reinforcement bar is fixedly connected to the lower embedded plate; a lower transition plate is provided on the side of the lower embedded plate near the circular opening; the end of the lower transition plate extends beyond the edge of the floor slab and is connected to the vertical steel frame.

[0008] Preferably, the connecting assembly includes an upper connecting plate and an upper transition plate; the connecting assembly is connected to the side of the steel structure roof truss near the circular opening; the upper transition plate is connected to the upper connecting plate, and the upper transition plate is connected to the upper part of the vertical steel frame.

[0009] Preferably, the first limiting member includes a horizontal plate and a first limiting plate; the horizontal plate is connected to the top of the cow leg; there are two sets of the first limiting plates, which are respectively disposed on the top of the horizontal plate and on both sides of the tangential keel; the first limiting plate is welded to the tangential keel.

[0010] Preferably, the second limiting member includes a second limiting plate; there are two sets of the second limiting plates, which are connected to the top of the tangential keel and located on both sides of the corresponding circumferential keel; the second limiting plate is welded to the circumferential keel.

[0011] Preferably, a joint waterproofing layer is provided at the joint between the roof waterproofing layer and the corbel; the joint waterproofing layer is continuously provided around the corbel, and the upper end of the joint waterproofing layer covers the side wall of the corbel, while the lower end of the joint waterproofing layer covers the top of the roof waterproofing layer; a cover is provided at the upper end of the joint waterproofing layer; and the space between the cover and the joint waterproofing layer is filled with a filler material.

[0012] Preferably, the decorative layer is made of decorative panels spliced ​​together and connected to the outside of the vertical steel frame; the lower edge of the decorative layer is bent inward horizontally to cover the bottom of the floor slab, and the upper edge of the decorative layer is bent inward to cover the inside of the vertical steel frame.

[0013] Preferably, the UHPC decorative panel has an anchor rod pre-embedded on the side near the upper steel frame, and the UHPC decorative panel is welded to the upper steel frame through the anchor rod; adjacent UHPC decorative panels are connected by tongue and groove joints, and the joints are filled with sealing rods and sealant.

[0014] A construction method for a ring roof system includes the following steps.

[0015] Step 1, Construction of embedded components: During the construction of the floor slab of the main structure, embedded components are pre-embedded and accurately positioned. Near the circular opening, the transition plate is fixed to ensure that its end extends outward, providing a foundation for the subsequent connection of the vertical steel frame.

[0016] Step 2, install the steel roof truss: install the steel roof truss on the top of the floor slab and fix it according to the circular plan layout; at the same time, weld the connecting components to the side of the steel roof truss near the opening.

[0017] Step 3: Group installation of corbels; Several groups of corbels are arranged circumferentially on the top of the steel roof truss, with each group arranged radially.

[0018] Step 4, Install the vertical steel frame: Arrange the vertical steel frame along the edge of the circular opening, forming a ring-shaped facade structure. The lower end of the vertical steel frame is connected to the pre-embedded component, and the upper end of the vertical steel frame is connected to the connecting component.

[0019] Step 5, Install the lower steel frame: The lower steel frame is installed on the upper part of the corbel in a circular planar arrangement.

[0020] Step 6, Roof layer structure construction: Lay the profiled steel sheet layer, insulation layer and roof waterproofing layer in sequence from the inside out; fill the lower steel frame with a sound-absorbing layer, and set the sealing layer at the bottom of the lower steel frame.

[0021] Step 7: For the upper steel frame, first install the tangential keel, and then install the circumferential keel.

[0022] Step 8, Installation of the decorative layer: On the outside of the vertical steel frame, aluminum single-panel splicing method is used for installation.

[0023] Step 9, Laying UHPC decorative panels: Lay UHPC decorative panels on the top surface of the upper steel frame. This completes the construction.

[0024] Compared with the prior art, the present invention has the following features and beneficial effects.

[0025] 1. This invention arranges the steel roof truss into a ring structure, in conjunction with vertical steel frames, a lower steel frame, and an upper steel frame, forming a stable multi-layered spatial force-bearing system. This ensures a tight connection between the roof structure and the main structure, resulting in strong overall structural integrity, significantly improved adaptability and deformation resistance, and suitability for various complex architectural forms. Furthermore, this invention innovatively separates the roof insulation and waterproofing layer from the finishing layer. The insulation and waterproofing structure is located on the lower steel frame system, focusing on thermal and waterproof performance; the finishing layer is set on an independent upper steel frame, focusing on decorative effects and appearance design. This separated structure greatly enhances the specialization of each functional layer, clearly defines functional zones, avoids mutual interference, and improves the overall system's performance stability and reliability.

[0026] 2. This invention is easy to maintain and has a long service life. The surface layer structure of this roofing system is independent, and it can avoid damaging the waterproof layer during later repairs, replacements or upgrades, thereby reducing maintenance costs and improving the service life and economy of the roof.

[0027] 3. The multi-layered frame design of this invention provides flexible construction: The roof system adopts a multi-level structural design of "steel structure roof truss + lower steel frame + upper steel frame", which has clear structural stress and clear division of labor among each layer. This is conducive to the step-by-step construction and precise installation of multi-functional structural layers such as profiled steel sheet, insulation layer, waterproof layer, sound absorption layer, sealing layer and UHPC decorative panel, ensuring structural performance while improving construction efficiency.

[0028] 4. This invention provides a complete and systematic construction method, including the entire process from setting embedded parts to assembling the frame, and then to laying the roof layers and installing the finishing layer. It is convenient for standardized promotion and quality control in actual projects. It has significant improvements over existing technologies in terms of structural stability, construction convenience, system functional integrity and architectural aesthetics, and has broad application prospects and promotion value.

[0029] 5. The limiting structure of this invention is reasonably designed and the components are precisely assembled. By setting the first limiting component and the second limiting component, the positioning of the tangential keel and the circumferential keel during the installation process is ensured to be accurate and the connection is firm, which effectively avoids installation errors, improves assembly efficiency and structural accuracy. Furthermore, by setting an independent decorative layer and adopting aluminum single panel splicing and two-way covering structure, not only is the overall aesthetics of the building enhanced, but the appearance style can also be flexibly adjusted according to the building requirements to meet various design expression needs. Attached Figure Description

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] Figure 1 This is a top view of the upper steel frame structure in this invention.

[0032] Figure 2 This is a schematic diagram of the cross-sectional structure of the roof system on the side of the steel structure roof truss in this invention.

[0033] Figure 3 This is a schematic cross-sectional view of the roof system at the top of the steel roof truss in this invention.

[0034] Figure 4 This is a schematic diagram of the connection structure between the vertical steel frame and the floor slab in this invention.

[0035] Figure 5 This is a schematic diagram of the connection structure between the vertical steel frame and the steel roof truss in this invention.

[0036] Figure 6 This is a schematic diagram of the connection structure between the upper steel frame and the corbel through the first limiting member in this invention.

[0037] Figure 7 This is a schematic diagram of the connection structure between the ring roof system and the corbel in this invention.

[0038] Figure 8 This is a three-dimensional structural diagram of the upper steel frame in this invention.

[0039] Attached reference numerals: 1 - Floor slab, 2 - Steel roof truss, 3 - Circular opening, 4 - Vertical steel frame, 5 - Lower steel frame, 6 - Upper steel frame, 6.1 - Tangential joist, 6.2 - Circumferential joist, 6.2.1 - Circumferential joist unit, 6.2.2 - Short rod, 7 - Corbel, 8 - Embedded component, 8.1 - Lower embedded plate, 8.2 - Lower embedded reinforcement, 8.3 - Lower transition plate, 9 - Connecting component, 9.1 - Upper connecting plate, 9.2 - Upper transition plate, 10 - Corrugated steel sheet layer, 10.1 - Corrugated steel sheet, 10.2 - Connecting strip 11 - Insulation layer, 12 - Roof waterproofing layer, 13 - Sealing layer, 14 - Sound absorption layer, 15 - First limiting component, 15.1 - Horizontal plate, 15.2 - First limiting plate, 16 - Second limiting component, 16.1 - Second limiting plate, 17 - UHPC decorative panel, 18 - Decorative layer, 19 - Joint waterproofing layer, 20 - Shell, 21 - Filling material, 22 - Upper anti-condensation layer, 23 - Lower anti-condensation layer, 24 - Second ring hoop, 25 - Sound-absorbing cotton, 26 - Gypsum board, 27 - First ring hoop, 28 - Vertical keel frame. Detailed Implementation

[0040] like Figure 1-8As shown, this ring-shaped roof system on a steel structure is installed on the floor slab 1 of the main structure and includes a steel roof truss 2; a circular opening 3 is pre-reserved in the middle of the floor slab 1; it also includes a vertical steel frame 4, a lower steel frame 5, and an upper steel frame 6; the steel roof truss 2 has a ring-shaped planar structure and is connected to the floor slab 1 at the top of the main structure; corbels 7 are spaced apart at the top of the steel roof truss 2; there are multiple sets of corbels 7 arranged in a ring; each set of corbels 7 is spaced apart radially; the corbels spaced apart radially... The heights of the brackets 7 are not entirely the same, but the heights of the brackets 7 corresponding to each other along the circumference are the same; the horizontal cross-section of the vertical steel frame 4 is annular, set along the edge of the circular opening 3, and the lower end of the vertical steel frame 4 is connected to the floor slab 1 through a pre-embedded component 8, and the upper part of the vertical steel frame 4 is connected to the steel structure roof truss 2 through a connecting component 9; the planar structure of the lower steel frame 5 is annular, set above the steel structure roof truss 2, and the lower steel frame 5 is connected to the upper part of the brackets 7; the top of the lower steel frame 5 and the inner part of the vertical steel frame 4 The upper steel frame 5 is provided with a profiled steel sheet layer 10, an insulation layer 11, and a roof waterproofing layer 12 arranged sequentially from the inside out. A sealing layer 13 is laid at the bottom of the lower steel frame 5, and a sound-absorbing layer 14 is filled inside the lower steel frame 5 and on top of the sealing layer 13. The sealing layer 13 includes a wire mesh and fiberglass cloth. The wire mesh is suspended below the lower steel frame 5 by wire, with a spacing of 30mm between the wire mesh and the lower steel frame 5. Fiberglass cloth is laid on top of the wire mesh. The upper steel frame 6 includes a tangential keel 6.1 and a ring... The keel 6.2; the top of the bracket 7 is provided with a first limiting member 15; the tangential keel 6.1 is correspondingly provided on the top of a group of brackets 7 and is connected to the first limiting member 15; the top of the tangential keel 6.1 is provided with a second limiting member 16 at radial intervals; there are multiple groups of circumferential keels 6.2, arranged at radial intervals, and each group of circumferential keels 6.2 forms a circle around the perimeter; a UHPC decorative panel 17 is laid on the top of the upper steel frame 6, and a decorative layer 18 is provided on the outside of the vertical steel frame 4.

[0041] In this embodiment, the vertical steel frame 4 is made of uprights and horizontal bars; there is a set of uprights, which are arranged at intervals along the circumference; the horizontal bars are connected between adjacent uprights and together with the uprights form a horizontally annular grid structure.

[0042] In this embodiment, sound-absorbing cotton 25 is provided inside the vertical profiled steel sheet layer 10; a gypsum board layer 26 with fireproof and sound insulation functions is provided inside the sound-absorbing cotton 25; the gypsum board layer 26 is double-layered with a thickness of 12mm. At the top of the floor slab 1, a vertical keel frame 28 is provided around the circular opening 3; the vertical keel frame 28 includes vertical keels and horizontal keels, which together form a grid structure; the sound-absorbing cotton 25 is filled in the vertical keel frame 28; the gypsum board layer 26 is installed inside the vertical keel frame 28.

[0043] In this embodiment, the side closer to the floor slab 1 is defined as the inner side, and the side farther from the floor slab 1 is defined as the outer side; the roof waterproof layer 12 uses two 3mm thick SBS modified bitumen waterproof membranes. The profiled steel sheet layer 10 is made of spliced ​​profiled steel sheets, and a connecting strip 10.2 is provided at the joint between adjacent profiled steel sheets 10.1; the edge of the profiled steel sheet 10.1 is pressed onto the connecting strip 10.2 and connected by screws; sealant is provided at the joint between the profiled steel sheet 10.1 and the connecting strip 10.2.

[0044] In this embodiment, the circumferential keel 6.2 includes a circumferential keel unit 6.2.1 and short rods 6.2.2; there is a set of circumferential keel units 6.2.1 arranged circumferentially; the short rods 6.2.2 are connected between adjacent circumferential keel units 6.2.1, and the short rods 6.2.2 are fixedly connected to the second limiting member 16; the end of the circumferential keel unit 6.2.1 is connected to the bottom of the corresponding short rod 6.2.2; the circumferential keel unit 6.2.1 is a straight rod or a bent rod; when the circumferential keel unit 6.2.1 is a bent rod, the circumferential keel unit 6.2.1 includes a horizontal section in the middle and inclined sections set at both ends of the horizontal section.

[0045] In this embodiment, the top surface of the ring roof system is divided into multiple rings from the center to the edge. The slope of the top surface of the rings near the center is small, and the slope of the top surface of the rings near the edge is large. The straight rod-shaped circumferential keel unit 6.2.1 is set on the innermost ring. The folded rod-shaped circumferential keel unit 6.2.1 is set on the rings that are not the innermost ring. The top surface of the rings that are not the innermost ring has a folded structure.

[0046] In this embodiment, the embedded component 8 includes a lower embedded plate 8.1 and a lower embedded rib 8.2; the lower embedded plate 8.1 and the lower embedded rib 8.2 are embedded in the floor slab 1 near the edge, and the lower embedded rib 8.2 is fixedly connected to the lower embedded plate 8.1; a lower transition plate 8.3 is provided on the side of the lower embedded plate 8.1 near the circular opening 3; the end of the lower transition plate 8.3 extends beyond the edge of the floor slab 1 and is connected to the vertical steel frame 4.

[0047] In this embodiment, the connecting component 9 includes an upper connecting plate 9.1 and an upper transition plate 9.2; the connecting component 9 is connected to the side of the steel structure roof truss 2 near the circular opening 3; the upper transition plate 9.2 is connected to the upper connecting plate 9.1, and the upper transition plate 9.2 is connected to the upper part of the vertical steel frame 4.

[0048] In this embodiment, the first limiting member 15 includes a horizontal plate 15.1 and a first limiting plate 15.2; the horizontal plate 15.1 is connected to the top of the cow leg 7; there are two sets of the first limiting plate 15.2, which are respectively set on the top of the horizontal plate 15.1 and on both sides of the tangent keel 6.1; the first limiting plate 15.2 is welded to the tangent keel 6.1.

[0049] In this embodiment, the second limiting member 16 includes a second limiting plate 16.1; there are two sets of the second limiting plate 16.1, which are connected to the top of the tangential keel 6.1 and located on both sides of the corresponding circumferential keel 6.2; the second limiting plate 16.1 is welded to the circumferential keel 6.2.

[0050] In this embodiment, a joint waterproofing layer 19 is provided at the joint between the roof waterproofing layer 12 and the corbel 7; the joint waterproofing layer 19 is continuously provided around the corbel 7, and the upper end of the joint waterproofing layer 19 covers the side wall of the corbel 7, and the lower end of the joint waterproofing layer 19 covers the top of the roof waterproofing layer 12; a cover 20 is provided on the upper end of the joint waterproofing layer 19; the space between the cover 20 and the joint waterproofing layer 19 is filled with a filler material 21.

[0051] In this embodiment, the horizontal cross-sectional shape of the casing 20 is adapted to the horizontal cross-sectional shape of the bracket 7, and the horizontal cross-sectional dimension of the casing 20 is smaller at the top and larger at the bottom; sealant is provided at the joint between the top edge of the casing 20 and the bracket 7. First ring hoops 27 are respectively provided on the upper and lower parts of the casing 20.

[0052] In this embodiment, the decorative layer 18 is made of decorative panels spliced ​​together. The decorative panels are made of aluminum single panels, and the aluminum single panels are connected to the outside of the vertical steel frame 4 by corner plates and bolts. The lower edge of the decorative layer 18 is bent inward horizontally and covers the bottom of the floor slab 1, and the upper edge of the decorative layer 18 is bent inward and covers the inside of the vertical steel frame 4.

[0053] In this embodiment, an anchor rod is pre-embedded on the side of the UHPC decorative panel 17 near the upper steel frame 6, and the UHPC decorative panel 17 is welded to the upper steel frame 6 through the anchor rod; adjacent UHPC decorative panels 17 are connected by tongue and groove joints, and sealing rods and sealant are used to fill the joints.

[0054] In this embodiment, the corbel 7 is made of steel pipe, and an upper anti-condensation layer 22 is provided inside the steel pipe and at the top of the roof waterproof layer 12; the thickness of the upper anti-condensation layer 22 is not less than 50mm, and a lower anti-condensation layer 23 is provided on the outer wall of the corbel 7 and below the insulation layer 11; a second ring hoop 24 is provided on the outer side of the lower anti-condensation layer 23; both the upper anti-condensation layer 22 and the lower anti-condensation layer 23 are made of insulating rock wool.

[0055] The construction method for this ring-shaped roof system includes the following steps.

[0056] Step 1, Construction of embedded component 8: During the construction of the floor slab 1 of the main structure, embedded component 8 is embedded and accurately positioned; near the circular opening, the lower transition plate is fixed to ensure that its end extends outward, providing a foundation for the subsequent connection of the vertical steel frame 4.

[0057] Step 2, install steel structure roof truss 2: install steel structure roof truss 2 on the top of floor slab 1 and fix it according to the circular plan layout; at the same time, weld the connecting component 9 to the side of steel structure roof truss 2 near the opening; connect the upper transition plate to the upper position of the corresponding vertical steel frame to realize the overall connection between the roof truss and the vertical steel frame.

[0058] Step 3, group installation of brackets 7; several groups of brackets 7 are arranged circumferentially along the top of the steel structure roof truss 2. Each group of brackets 7 is arranged radially and has a different height. The brackets 7 at the same position in the circumferential direction have the same height. The brackets 7 are welded to the top of the steel structure roof truss 2.

[0059] Step 4, install the vertical steel frame 4: arrange the vertical steel frame 4 along the edge of the circular opening, forming a ring-shaped facade structure. The lower end of the vertical steel frame 4 is connected to the pre-embedded component 8, and the upper end of the vertical steel frame 4 is connected to the connecting component 9.

[0060] Step 5, Install the lower steel frame 5: The lower steel frame 5 is installed on the upper part of the bracket 7 in a circular planar arrangement.

[0061] Step 6, Roof layer structure construction: From the inside out, lay the profiled steel sheet layer 10, the insulation layer 11 and the roof waterproof layer 12 in sequence; fill the lower steel frame 5 with a sound-absorbing layer 14, and set the sealing layer 13 at the bottom of the lower steel frame 5.

[0062] Then, a joint waterproofing layer 19 is installed at the joint between the top of the roof waterproofing layer 12 and the corbel 7. The joint waterproofing layer 19 overlaps with the corbel 7. A shell is installed over the joint between the waterproofing layer and the corbel 7. The shell is filled with flexible filler material to enhance waterproofing and sealing performance.

[0063] Step 7: For the upper steel frame 6, first install the tangential keel 6.1, and then install the circumferential keel 6.2;

[0064] The installation of the tangential keel 6.1 is as follows: the tangential keel 6.1 is set at the top of the bracket 7 and is connected with the first limiting member; and a second limiting member is arranged on the top of the tangential keel for positioning of the circumferential keel.

[0065] The installation of the circumferential keel 6.2 is as follows: multiple circumferential keel groups are arranged radially, each group forming a ring; each group consists of multiple circumferential keel units and short rods connected together; the short rods are inserted between the second limiting plates, and the keel units can be straight rods or bent rods, and the angle of the inclined section of the bent rods needs to be controlled to be uniform.

[0066] Step 8, Installation of decorative layer 18: On the outside of the vertical steel frame 4, aluminum single panels are spliced ​​together; each aluminum single panel is fixed to the exterior of the vertical steel frame 4 by connecting plates and bolts; the lower edge is bent inward horizontally to cover the bottom of the floor slab 1; the upper edge is turned inward to cover the inside of the vertical steel frame 4.

[0067] Step 9, Laying UHPC decorative panel 17: Lay UHPC decorative panel 17 on the top surface of the upper steel frame 6, thus completing the construction.

[0068] The above embodiments are not exhaustive examples of specific implementation methods, and other embodiments are also possible. The purpose of the above embodiments is to illustrate the present invention, rather than to limit the scope of protection of the present invention. All applications derived from simple variations of the present invention fall within the scope of protection of the present invention.

Claims

1. A ring-shaped roof system on a steel structure, installed on the floor slab (1) of the main structure, including a steel roof truss (2); a circular opening (3) is pre-reserved in the middle of the surface of the floor slab (1); characterized in that: It also includes a vertical steel frame (4), a lower steel frame (5), and an upper steel frame (6); the steel structure roof truss (2) has a ring-shaped planar structure and is connected to the floor slab (1) at the top of the main structure; corbels (7) are spaced at the top of the steel structure roof truss (2); there are multiple sets of corbels (7) arranged in a ring; each set of corbels (7) is spaced at a radial distance; the heights of the corbels (7) spaced at a radial distance are not the same, and the heights of the corbels (7) corresponding to each other in the ring are the same; the horizontal cross-section of the vertical steel frame (4) is ring-shaped and is set along the edge of the circular opening (3), and the lower end of the vertical steel frame (4) is connected by a pre-embedded component. (8) Connected to the floor slab (1), the upper part of the vertical steel frame (4) is connected to the steel structure roof truss (2) through the connecting component (9); the planar structure of the lower steel frame (5) is ring-shaped, set above the steel structure roof truss (2), and the lower steel frame (5) is connected to the upper part of the corbel (7); the top of the lower steel frame (5) and the inner side of the vertical steel frame (4) are provided with a profiled steel sheet layer (10), an insulation layer (11) and a roof waterproof layer (12) in sequence from the inside to the outside; the bottom of the lower steel frame (5) is covered with a sealing layer (13), and the bottom of the sealing layer (13) is filled in the lower steel frame (5). The upper steel frame (6) includes a sound-absorbing layer (14); the upper steel frame (6) includes a tangential keel (6.1) and a circumferential keel (6.2); a first limiting member (15) is provided on the top of the bracket (7); the tangential keel (6.1) is correspondingly provided on the top of a group of brackets (7) and is correspondingly connected to the first limiting member (15); a second limiting member (16) is provided on the top of the tangential keel (6.1) at radial intervals; there are multiple groups of circumferential keels (6.2) arranged at radial intervals, and each group of circumferential keels (6.2) forms a circle around the perimeter; a UHPC decorative panel (17) is laid on the top of the upper steel frame (6). A decorative layer (18) is provided on the outside of the vertical steel frame (4); the circumferential keel (6.2) includes a circumferential keel unit (6.2.1) and a short rod (6.2.2); there is one set of circumferential keel units (6.2.1), arranged circumferentially; the short rod (6.2.2) is connected between adjacent circumferential keel units (6.2.1), and the short rod (6.2.2) is fixedly connected to the second limiting member (16); the end of the circumferential keel unit (6.2.1) is connected to the bottom of the corresponding short rod (6.2.2); the circumferential keel unit (6.2.1) is a straight rod or a bent rod; when the circumferential keel unit ( When 6.2.1) is a bent rod, the circumferential keel unit ( 6.2.1) Includes a horizontal section in the middle and diagonal sections at both ends of the horizontal section; The first limiting member (15) includes a horizontal plate (15.1) and a first limiting plate (15.2); the horizontal plate (15.1) is connected to the top of the cow leg (7); there are two sets of the first limiting plates (15.2), which are respectively set on the top of the horizontal plate (15.1) and on both sides of the tangential keel (6.1); the first limiting plate (15.2) is welded to the tangential keel (6.1); A joint waterproof layer (19) is provided at the joint between the roof waterproof layer (12) and the corbel (7); the joint waterproof layer (19) is continuously provided around the corbel (7), and the upper end of the joint waterproof layer (19) covers the side wall of the corbel (7), and the lower end of the joint waterproof layer (19) covers the top of the roof waterproof layer (12); a shell (20) is provided on the upper end of the joint waterproof layer (19); the space between the shell (20) and the joint waterproof layer (19) is filled with filler material (21).

2. The annular roof system on a steel structure according to claim 1, characterized in that: The pre-embedded component (8) includes a lower pre-embedded plate (8.1) and a lower pre-embedded rib (8.2); the lower pre-embedded plate (8.1) and the lower pre-embedded rib (8.2) are embedded in the floor slab (1) near the edge, and the lower pre-embedded rib (8.2) is fixedly connected to the lower pre-embedded plate (8.1); a lower transition plate (8.3) is provided on the side of the lower pre-embedded plate (8.1) near the circular opening (3); the end of the lower transition plate (8.3) extends beyond the edge of the floor slab (1) and is connected to the vertical steel frame (4).

3. The annular roof system on a steel structure according to claim 1, characterized in that: The connecting component (9) includes an upper connecting plate (9.1) and an upper transition plate (9.2); the connecting component (9) is connected to the side of the steel structure roof truss (2) near the circular opening (3); the upper transition plate (9.2) is connected to the upper connecting plate (9.1) and the upper transition plate (9.2) is connected to the upper part of the vertical steel frame (4).

4. The annular roof system on a steel structure according to claim 1, characterized in that: The second limiting member (16) includes a second limiting plate (16.1); there are two sets of the second limiting plate (16.1), which are connected to the top of the tangential keel (6.1) and located on both sides of the corresponding circumferential keel (6.2); the second limiting plate (16.1) is welded to the circumferential keel (6.2).

5. The annular roof system on a steel structure according to claim 1, characterized in that: The decorative layer (18) is made of decorative panels and is connected to the outside of the vertical steel frame (4); the lower edge of the decorative layer (18) is bent inward horizontally and covers the bottom of the floor slab (1), and the upper edge of the decorative layer (18) is bent inward and covers the inside of the vertical steel frame (4).

6. The annular roof system on a steel structure according to claim 1, characterized in that: An anchor rod is pre-embedded on the side of the UHPC decorative panel (17) near the upper steel frame (6). The UHPC decorative panel (17) is welded to the upper steel frame (6) through the anchor rod. The adjacent UHPC decorative panels (17) are connected by tongue and groove joints, and the joints are filled with sealing rods and sealant.

7. A construction method for the ring-shaped roof system according to any one of claims 1-6, characterized in that, The steps include the following: Step 1, Construction of embedded components (8): When constructing the floor slab (1) of the main structure, embed the embedded components (8) and accurately position them; Step 2, install the steel structure roof truss (2): install the steel structure roof truss (2) on the top of the floor slab (1) according to the circular plan layout; at the same time, weld the connecting component (9) to the side of the steel structure roof truss (2) near the opening; Step 3, group installation of corbels (7); several groups of corbels (7) are arranged circumferentially on the top of the steel structure roof truss (2), and each group of corbels (7) is arranged radially; Step 4, install the vertical steel frame (4): arrange the vertical steel frame (4) along the edge of the circular opening, forming a ring-shaped facade structure. The lower end of the vertical steel frame (4) is connected to the pre-embedded component (8), and the upper end of the vertical steel frame (4) is connected to the connecting component (9). Step 5, Install the lower steel frame (5): The lower steel frame (5) is installed on the upper part of the corbel (7) in a circular planar arrangement; Step 6, Roof layer structure construction: From the inside out, lay the profiled steel sheet layer (10), the insulation layer (11) and the roof waterproof layer (12); fill the lower steel frame (5) with a sound-absorbing layer (14), and set the sealing layer (13) at the bottom of the lower steel frame (5). Step 7, upper steel frame (6), first install the tangential keel (6.1), and then install the circumferential keel (6.2). Step 8, Decorative layer installation: Install the decorative layer on the outside of the vertical steel frame; Step 9, Laying UHPC decorative panels (17): Lay UHPC decorative panels (17) on the top surface of the upper steel frame (6), thus completing the construction.

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