A lattice shell arch steel structure and its construction method

Abstract

The present invention relates to the technical field of steel structures, and discloses a lattice arch steel structure and a construction method thereof, wherein the lattice arch steel structure comprises a frame structure and a plurality of mutually intersecting forward arch components and a plurality of reverse arch components arranged on the frame structure, wherein the lattice arch steel structure comprises an upper and lower two-layer reticular structure. This structural design increases the rigidity and strength of the entire steel structure, enhances the bearing capacity, and can improve the stability of the building structure. In addition, the lattice arch steel structure provided by the present invention has a simple structure and is easy to assemble, which is conducive to the overall assembly in the later stage. The construction method of the lattice arch steel structure provided by the present invention can realize the sliding assembly of multiple lattice arch steel structures in sequence, thereby avoiding the use of large-scale lifting equipment for high-altitude bulk assembly, effectively reducing construction costs and installation risks, and at the same time, the overall assembly can ensure the installation and positioning accuracy of the steel structure, improve the stability of the building structure, and ensure the construction quality.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structures, and in particular to a lattice shell arch steel structure and a construction method thereof. Background Art

[0002] Currently, steel structures are increasingly used in the field of construction engineering. Large-span roof structures are also increasingly being used. Due to their significant deadweight, these structures place certain demands on the rationality of their design. To meet the overall structural function while reducing deadweight and improving structural rigidity, beam-string structures equipped with cables are increasingly being used in large steel structures. The beam-string structure is simple, novel, and offers a reasonable load distribution, making it widely used in large public buildings such as stadiums.

[0003] In the existing technology, most beam-string structures are single-layer mesh structures. Although the amount of steel structure used is reduced, the stability of the steel structure is poor. In addition, the existing steel structures are usually bulked at high altitudes, requiring the installation of multiple support frames and the use of large cranes for construction, which is inconvenient to install and has high construction costs. Summary of the Invention

[0004] In view of the above problems, an object of the present invention is to provide a lattice shell arch steel structure with strong bearing capacity, good stability and easy installation.

[0005] Another object of the present invention is to provide a construction method for a lattice shell arch steel structure, which has strong operability, avoids high-altitude bulk assembly, can realize the overall assembly of the steel structure, and reduce construction costs.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A lattice shell arch steel structure, comprising:

[0008] The frame structure includes a first side member, a first end truss, a second side member and a second end truss connected end to end;

[0009] A plurality of forward arch assemblies and a plurality of reverse arch assemblies, wherein the plurality of forward arch assemblies and the plurality of reverse arch assemblies are arranged crosswise, wherein one end of the forward arch assemblies is connected to the first side bar and the other end is connected to the second side bar or the first end truss, or one end of the forward arch assemblies is connected to the second end truss and the other end is connected to the second side bar;

[0010] One end of the reverse arch component is connected to the first side bar, and the other end is connected to the second side bar or the second end truss, or one end of the reverse arch component is connected to the first end truss, and the other end is connected to the second side bar.

[0011] As a preferred solution of the lattice shell arch steel structure of the present invention, each of the forward arch components includes a forward box arch and a lower cable opposite to each other up and down, and each of the reverse arch components includes an upper cable and a reverse box arch opposite to each other up and down, the upper cable is covered on the outside of multiple forward box arches, and the lower cable is covered on the outside of multiple reverse box arches.

[0012] As a preferred embodiment of the lattice shell arch steel structure of the present invention, it further includes a first support assembly and a second support assembly, wherein a plurality of the first support assemblies are arranged at intervals along the length direction on the first side bar and the second side bar, the plurality of the first support assemblies of the first side bar are fixed to the first concrete beam at a preset installation position, and the plurality of the first support assemblies of the second side bar are fixed to the second concrete beam at a preset installation position, and the intersecting forward box arch and the reverse box arch are connected to the same first support assembly;

[0013] The ends of the first side bar and the second side bar are both provided with the second support assembly, and the first end truss and the second end truss are both connected to the first side bar and the second side bar through the second support assembly.

[0014] As a preferred solution of the lattice arch steel structure of the present invention, the first end truss and the second end truss both include an upper chord, a lower chord, and a web sandwiched between the upper chord and the lower chord, and the upper chord and the lower chord are both provided with connecting corbels and connecting lugs, the forward box arch is connected to the connecting corbel of the upper chord, the reverse box arch is connected to the connecting corbel of the lower chord, the upper cable is hinged to the connecting lug of the upper chord, and the lower cable is hinged to the connecting lug of the lower chord.

[0015] As a preferred solution of the lattice shell arch steel structure of the present invention, the first support assembly and the second support assembly both include a support and a pillar arranged on the support, a mounting plate is provided on the pillar, and a first connecting member and a second connecting member are provided on the mounting plate of the first support assembly, the forward box arch is connected to the first connecting member, and the reverse box arch is connected to the second connecting member.

[0016] As a preferred solution of the lattice shell arch steel structure of the present invention, a third connecting member and two fourth connecting members arranged at an angle are provided on the mounting plate of the second support assembly, the third connecting member is connected to the forward box arch or the reverse box arch, one of the fourth connecting members is connected to the upper chord, and the other fourth connecting member is connected to the lower chord.

[0017] As a preferred solution of the lattice shell arch steel structure of the present invention, a fifth connecting member is provided on the side of the mounting plate of the first support assembly facing away from the first connecting member, and on the side of the mounting plate of the second support assembly facing away from the third connecting member, and the fifth connecting member is connected to the first side rod or the second side rod.

[0018] As a preferred solution of the lattice arch steel structure of the present invention, each of the forward box arches and each of the reverse box arches is provided with a limiting portion, and the first side bar and the second side bar are both provided with a first ear plate and a second ear plate, one end of the upper cable is hinged to the first ear plate of the first side bar, and the other end sequentially passes through the limiting portions of the plurality of forward box arches and is hinged to the first ear plate of the second side bar or the connecting ear plate of the upper chord of the second end truss, or one end of the upper cable is hinged to the connecting ear plate of the upper chord of the first end truss, and the other end sequentially passes through the limiting portions of the plurality of forward box arches and is hinged to the first ear plate of the second side bar;

[0019] One end of the down-pull cable is hinged to the second ear plate of the first side rod, and the other end passes through the limiting parts of multiple reverse box arches in sequence, and is hinged to the second ear plate of the second side rod or the connecting ear plate of the lower chord rod of the first end truss, or one end of the down-pull cable is hinged to the connecting ear plate of the lower chord rod of the second end truss, and the other end passes through the limiting parts of multiple reverse box arches in sequence, and is hinged to the second ear plate of the second side rod.

[0020] As a preferred solution of the lattice shell arch steel structure of the present invention, the lattice shell arch steel structure further includes vertical uprights, and the cross-opposite forward box arches and the reverse box arches are connected by the vertical uprights.

[0021] A construction method for a lattice shell arch steel structure, wherein the lattice shell arch steel structure is moved from an assembly area and installed at a preset installation position by a sliding tool, specifically comprising the following steps:

[0022] According to the construction conditions, the lattice shell arch steel structure is modeled and calculated using the numerical simulation method to obtain a lattice shell arch steel structure that meets the lifting requirements;

[0023] Set up a sliding steel beam in the assembly area, install the first guide rail on the sliding steel beam, and install the second guide rail and the embedded guide rail on the first concrete beam and the second concrete beam at the preset installation position;

[0024] Assemble the lattice shell arch steel structure in the assembly area, and install the sliding tooling on the first support assembly and the second support assembly of the lattice shell arch steel structure;

[0025] Driving the sliding fixture to slide on the first guide rail and the second guide rail to move the lattice shell arch steel structure from the assembly area to the preset installation position;

[0026] Remove the patching guide rail and fix the first support assembly and the second support assembly on the first concrete beam and the second concrete beam, and then remove the sliding tooling.

[0027] The beneficial effects of the present invention are:

[0028] The lattice arch steel structure provided by the present invention includes a frame structure and a plurality of forward arch assemblies and a plurality of reverse arch assemblies arranged on the frame structure. The frame structure includes a first side bar, a first end truss, a second side bar, and a second end truss connected end to end. The plurality of forward arch assemblies and the plurality of reverse arch assemblies are arranged crosswise, with the forward arch assemblies forming an upper arch and the reverse arch assemblies forming a lower arch. One end of some forward arch assemblies is connected to the first side bar and the other end is connected to the second side bar or the first end truss, while another end of some forward arch assemblies is connected to the second end truss and the other end is connected to the second side bar; another end of some reverse arch assemblies is connected to the first side bar and the other end is connected to the second side bar or the second end truss, while another end of some reverse arch assemblies is connected to the first end truss and the other end is connected to the second side bar. In other words, the plurality of forward arch assemblies and the plurality of reverse arch assemblies intersect to form a lattice arch steel structure, which includes an upper and lower layer of lattice structure. This structural design increases the rigidity and strength of the entire steel structure, enhancing its load-bearing capacity, thereby improving the stability of the building structure. Furthermore, the present invention only requires the cross-assembly of multiple forward arch assemblies and multiple reverse arch assemblies of the same structure, resulting in a simple structure and easy assembly, which facilitates subsequent overall assembly.

[0029] The construction method of the lattice shell arch steel structure provided by the present invention pre-assembles the lattice shell arch steel structure in an assembly area, and pushes the lattice shell arch steel structure from the assembly area to a preset installation position by means of a sliding tool, thereby realizing the sliding assembly of multiple lattice shell arch steel structures in sequence, thereby avoiding the use of large-scale lifting equipment for high-altitude bulk assembly, effectively reducing construction costs and installation risks, and at the same time, the overall assembly can ensure the installation positioning accuracy of the steel structure, improve the stability of the building structure, and ensure construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0031] Figure 1 Schematic diagram of the overall structure of the lattice shell arch steel structure provided by a specific embodiment of the present invention;

[0032] Figure 2 1 is a structural diagram of a first end truss of a lattice shell arch steel structure provided by a specific embodiment of the present invention;

[0033] Figure 3 1 is a structural schematic diagram of a forward arch assembly of a lattice shell arch steel structure provided by a specific embodiment of the present invention;

[0034] Figure 4 1 is a structural diagram of a reverse arch assembly of a lattice shell arch steel structure provided by a specific embodiment of the present invention;

[0035] Figure 5 yes Figure 3 A partial enlarged view of point A in the middle;

[0036] Figure 6 yes Figure 4 A partial enlarged view of point B in the middle;

[0037] Figure 7 This is a schematic structural diagram of a first support assembly of a lattice shell arch steel structure provided in a specific embodiment of the present invention;

[0038] Figure 8 1 is a structural diagram of a second support assembly of a lattice shell arch steel structure provided in a specific embodiment of the present invention;

[0039] Figure 9 This is a flow chart of a construction method of a lattice shell arch steel structure provided by a specific embodiment of the present invention;

[0040] Figure 10 It is a structural schematic diagram of the lattice shell arch steel structure in the assembly area provided by a specific embodiment of the present invention;

[0041] Figure 11 It is a structural schematic diagram of the lattice shell arch steel structure provided by a specific embodiment of the present invention when it slides to a preset installation position;

[0042] Figure 12 This is a schematic diagram of the installation of a sliding fixture for a lattice shell arch steel structure provided by a specific embodiment of the present invention;

[0043] Figure 13 This is a schematic diagram of the installation of a sliding steel beam provided in a specific embodiment of the present invention;

[0044] Figure 14 yes Figure 13 A partial enlarged view of point C in the middle;

[0045] Figure 15 It is a schematic diagram of the installation of the pushing device provided in a specific embodiment of the present invention;

[0046] Figure 16 It is a structural schematic diagram of a sliding tool provided in a specific embodiment of the present invention;

[0047] Figure 17 It is an exploded view of a sliding tool provided in a specific embodiment of the present invention;

[0048] Figure 18 is a side view of a sliding tool provided in a specific embodiment of the present invention;

[0049] Figure 19 This is a first installation schematic diagram of a first support assembly of a lattice shell arch steel structure provided by a specific embodiment of the present invention;

[0050] Figure 20 This is a second installation schematic diagram of the first support assembly of the lattice shell arch steel structure provided by a specific embodiment of the present invention;

[0051] Figure 21 It is a structural schematic diagram of the support embedded parts of the lattice shell arch steel structure provided by a specific embodiment of the present invention.

[0052] In the picture:

[0053] 1-first side bar; 2-second side bar; 3-first end truss; 4-second end truss; 5-forward arch assembly;

[0054] 6-reverse arch assembly; 7-first support assembly; 8-second support assembly; 9-vertical pole; 10-sliding

[0055] Tooling; 20-Pushing device;

[0056] 11-first ear plate; 12-second ear plate;

[0057] 31-upper chord; 32-lower chord; 33-abdomen; 311-connecting corbel; 312-connecting lug;

[0058] 51-forward box arch; 52-lower cable; 511-limiting part;

[0059] 61-reverse box arch; 62-upper cable;

[0060] 71-support; 72-pillar; 73-mounting plate; 74-first connecting piece; 75-second connecting piece; 76-third connecting piece

[0061] Connector; 77- fourth connecting piece; 78- fifth connecting piece; 79- top plate;

[0062] 101-support beam; 102-longitudinal reinforcement; 103-stiffening rib; 104-strengthening rib; 105-limiting plate; 106-limiting stiffening rib; 107-sliding reinforcement rod; 108-first limiting block; 109-second limiting block;

[0063] 201-driving member; 202-rail clamp; 203-pushing ear plate;

[0064] 301-first concrete beam; 302-second concrete beam; 303-second guide rail; 304-embedded guide rail; 305-guide rail buried

[0065] 306-fasteners;

[0066] 400-sliding steel beam; 401-first guide rail; 402-embedded steel beam parts;

[0067] 501-support embedded parts; 502-anchor reinforcement. DETAILED DESCRIPTION

[0068] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the described embodiments are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0069] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0070] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0071] like Figures 1 to 8 As shown, this embodiment provides a lattice shell arch steel structure, which can be applied to the construction of large roof steel structures. The lattice shell arch steel structure includes a frame structure, a forward arch component 5 and a reverse arch component 6.

[0072] The frame structure includes a first side bar 1, a first end truss 3, a second side bar 2, and a second end truss 4 connected end to end; a plurality of forward arch assemblies 5 and a plurality of reverse arch assemblies 6 are arranged crosswise. Some forward arch assemblies 5 have one end connected to the first side bar 1 and the other end connected to the second side bar 2 or the first end truss 3; another portion of the forward arch assemblies 5 have one end connected to the second end truss 4 and the other end connected to the second side bar 2; another portion of the reverse arch assemblies 6 have one end connected to the first side bar 1 and the other end connected to the second side bar 2 or the second end truss 4; another portion of the reverse arch assemblies 6 have one end connected to the first end truss 3 and the other end connected to the second side bar 2.

[0073] The lattice arch steel structure provided in this embodiment is formed by intersecting multiple forward arch assemblies 5 and multiple reverse arch assemblies 6 to form a lattice arch steel structure, comprising an upper and lower mesh structure. This structural design increases the rigidity and strength of the entire steel structure, enhancing its load-bearing capacity, thereby improving the stability of the building structure. Furthermore, the lattice arch steel structure provided in this embodiment can be simply assembled by intersecting multiple forward arch assemblies 5 and multiple reverse arch assemblies 6 of the same structure, resulting in a simple structure and easy assembly, facilitating later overall assembly.

[0074] like Figure 1 、 Figure 3 and Figure 4 As shown, optionally, each forward arch assembly 5 includes a forward box arch 51 and a lower cable 52 that are opposite to each other in the upper and lower directions, and each reverse arch assembly 6 includes an upper cable 62 and a reverse box arch 61 that are opposite to each other in the upper and lower directions. The upper cable 62 is wrapped around the outside of the plurality of forward box arches 51, and the lower cable 52 is wrapped around the outside of the plurality of reverse box arches 61. That is, in this embodiment, each forward box arch 51 is located between the spans of the frame structure and is in the form of an upper arch. Each reverse box arch 61 is located between the spans of the frame structure and is in the form of a lower arch. The upper cable 62 is located above the forward box arch 51 and intersects with the plurality of forward box arches 51 arranged in sequence. The two ends of the upper cable 62 are correspondingly connected to the first side bar 1, the second side bar 2, the first end truss 3 or the second end truss 4. Tensioning the upper cable 62 can limit and fix the plurality of forward box arches 51. Similarly, the lower pull cable 52 is located below the reverse box arch 61 and intersects with multiple reverse box arches 61 arranged in sequence. The two ends of the lower pull cable 52 are correspondingly connected to the first side rod 1, the second side rod 2, the first end truss 3 or the second end truss 4. Tensioning the lower pull cable 52 can limit and fix multiple reverse box arches 61.

[0075] In this embodiment, both the upper and lower cables 62 and 52 are preferably high-vanadium cables. High-vanadium cables offer high corrosion resistance, excellent overall anti-slip and anti-displacement properties, significantly reducing process steps, and offer excellent bending properties, ensuring uniform load distribution throughout the cable. Furthermore, high-vanadium cables are compact, possess a metallic sheen, and possess a more metallic quality, creating a highly aesthetically pleasing appearance.

[0076] Optionally, the lattice shell arch steel structure further includes a first support assembly 7 and a second support assembly 8. A plurality of first support assemblies 7 are arranged at intervals along the length direction on the first side bar 1 and the second side bar 2. The plurality of first support assemblies 7 of the first side bar 1 are fixed to the first concrete beam 301 at a preset installation position, and the plurality of first support assemblies 7 of the second side bar 2 are fixed to the second concrete beam 302 at a preset installation position. The intersecting forward box-type arch 51 and reverse box-type arch 61 are connected to the same first support assembly 7. That is, the cross-connected ends of the forward box-type arch 51 and the reverse box-type arch 61 are connected to the first side bar 1 or the second side bar 2 through a first support assembly 7. Figure 1 and Figure 7 .

[0077] Optionally, the ends of the first side bar 1 and the second side bar 2 are both provided with a second support assembly 8, and the first end truss 3 and the second end truss 4 are both connected to the first side bar 1 and the second side bar 2 via the second support assembly 8. Figure 1 and Figure 2 The second support assembly 8 is installed at the ends of the first concrete beam 301 and the second concrete beam 302. The two ends of the first end truss 3 are respectively connected and fixed with the first side bar 1 and the second side bar 2 using a second support assembly 8, and the two ends of the second end truss 4 are respectively connected and fixed with the first side bar 1 and the second side bar 2 using a second support assembly 8.

[0078] like Figure 2 As shown, optionally, both the first end truss 3 and the second end truss 4 include an upper chord 31, a lower chord 32, and a web member 33 interposed between the upper chord 31 and the lower chord 32. In this embodiment, preferably, the upper chord 31 is in an upward arched form, and the lower chord 32 is in a downward arched form, to accommodate the varying arch shapes of the forward box arch 51 and the reverse box arch 61. A plurality of web members 33 are spaced apart between the upper chord 31 and the lower chord 32, and the lengths of the web members 33 vary to accommodate varying curvatures of the upper chord 31 and the lower chord 32.

[0079] Furthermore, both the upper chord 31 and the lower chord 32 are provided with a connecting bracket 311 and a connecting lug 312. The forward box arch 51 is connected to the connecting bracket 311 of the upper chord 31, and the reverse box arch 61 is connected to the connecting bracket 311 of the lower chord 32. The upper cable 62 is hinged to the connecting lug 312 of the upper chord 31, and the lower cable 52 is hinged to the connecting lug 312 of the lower chord 32. In this embodiment, the connecting bracket 311 and the connecting lug 312 are arranged at an angle, and the connecting bracket 311 is a hollow structure. Figure 1 Taking the first end truss 3 as an example, the forward box arch 51 extending from the first side bar 1 to the first end truss 3 is plugged into the connecting bracket 311 of the upper chord 31 and then reinforced by welding. This plug-in connection method facilitates installation and ensures accurate installation and positioning. The upper cable 62 extending from the second side bar 2 to the first end truss 3 is hingedly connected to the connecting lug 312 of the upper chord 31. Specifically, the connecting end of the upper cable 62 is separated by a first and a second connecting plate. Both the first and second connecting plates have first mounting holes, and the connecting lug 312 has a second mounting hole. During installation, the connecting lug 312 is placed between the first and second connecting plates, aligning the first and second mounting holes. The pin is then passed through the first and second mounting holes in sequence to achieve the hinged connection between the upper cable 62 and the connecting lug 312. This hinged connection allows the upper and lower cables 62 and 52 to adapt to the curvature changes of the forward and reverse box arches 51 and 61, facilitating subsequent tensioning operations.

[0080] Preferably, the connection method between the reverse box arch 61 and the lower chord 32 is the same as the connection method between the forward box arch 51 and the upper chord 31, and the hinge method between the lower cable 52 and the lower chord 32 is the same as the hinge method between the upper cable 62 and the upper chord 31, which will not be repeated here.

[0081] Furthermore, the connection method between the upper chord 31 and the lower chord 32 of the second end truss 4 and the forward box arch 51, the reverse box arch 61, the upper cable 62 and the lower cable 52 is the same as the connection method of the first end truss 3 mentioned above, and will not be repeated here.

[0082] like Figure 7 and Figure 8As shown, optionally, each of the first support assembly 7 and the second support assembly 8 includes a support 71 and a support column 72 disposed on the support 71. A mounting plate 73 is disposed on the support column 72. A first connector 74 and a second connector 75 are disposed on the mounting plate 73 of the first support assembly 7. The forward box-shaped arch 51 is connected to the first connector 74, and the reverse box-shaped arch 61 is connected to the second connector 75. Preferably, the first connector 74 and the second connector 75 are both hollow structures. When assembling the steel structure, the forward box-shaped arch 51 is plugged into the first connector 74, and the reverse box-shaped arch 61 is plugged into the second connector 75, and then reinforced by welding or the like. This plug-in connection allows for pre-positioning of the forward box-shaped arch 51 and the reverse box-shaped arch 61, ensuring installation accuracy.

[0083] Optionally, the mounting plate 73 of the second support assembly 8 is provided with a third connecting member 76 and two fourth connecting members 77 arranged at an angle, see Figure 2 The third connecting member 76 is connected to the forward box arch 51 or the reverse box arch 61, a fourth connecting member 77 is connected to the upper chord 31, and another fourth connecting member 77 is connected to the lower chord 32. Preferably, the third connecting member 76 and the two fourth connecting members 77 are both hollow structures. Taking the first end truss 3 as an example, the forward box arch 51 extending from the first side bar 1 to the first end truss 3 is plugged into the third connecting member 76, and the upper chord 31 and the lower chord 32 of the first end truss 3 are respectively plugged into a fourth connecting member 77, and then reinforced by welding, which is convenient for assembly.

[0084] Preferably, two pillars 72 are provided at intervals, the top ends of the two pillars 72 are connected by a top plate 79, and the mounting plate 73 is located between the two pillars 72. In order to ensure the connection strength between the two pillars 72, a reinforcement plate can be provided between the two pillars 72, and the reinforcement plate is located below the mounting plate 73. For details, please refer to Figure 19 .

[0085] like Figure 2 and Figure 7 As shown, optionally, a fifth connecting member 78 is provided on the side of the mounting plate 73 of the first support assembly 7 facing away from the first connecting member 74, and on the side of the mounting plate 73 of the second support assembly 8 facing away from the third connecting member 76. The fifth connecting member 78 is connected to the first side bar 1 or the second side bar 2. Specifically, one end of the fifth connecting member 78 is welded to the mounting plate 73, and the other end is welded to the first side bar 1 or the second side bar 2, thereby connecting multiple first support assemblies 7 and second support assemblies 8 to the first side bar 1, and multiple first support assemblies 7 and second support assemblies 8 to the second side bar 2. Preferably, the fifth connecting member 78 is a hollow structure, which can reduce the weight of the entire steel structure.

[0086] Optionally, each forward box-shaped arch 51 and each reverse box-shaped arch 61 are provided with a limiting portion 511, such as Figure 5and Figure 6 The first side bar 1 and the second side bar 2 are both provided with a first ear plate 11 and a second ear plate 12, as shown. Figure 7 See Figure 1 and Figure 4 One end of one portion of the upper cables 62 is hinged to the first lug 11 of the first side bar 1, and the other end sequentially passes through the stoppers 511 of the multiple forward box arches 51 and is hinged to the first lug 11 of the second side bar 2 or the connecting lug 312 of the upper chord 31 of the second end truss 4. Another portion of the upper cables 62 is hinged to the connecting lug 312 of the upper chord 31 of the first end truss 3, and the other end sequentially passes through the stoppers 511 of the multiple forward box arches 51 and is hinged to the first lug 11 of the second side bar 2. Specifically, the upper cables 62 wrap around the outer sides of the multiple forward box arches 51, and the tension on the upper cables 62 causes them to intersect with the multiple forward box arches 51 to form a first-layer mesh structure.

[0087] See Figure 1 and Figure 3 One end of a portion of the lower cables 52 is hinged to the second lug 12 of the first side bar 1, and the other end passes through the stoppers 511 of the multiple reverse box arches 61 in sequence, and is hinged to the second lug 12 of the second side bar 2 or the connecting lug 312 of the lower chord 32 of the first end truss 3. Another portion of the lower cables 52 is hinged to the connecting lug 312 of the lower chord 32 of the second end truss 4 in sequence, and the other end passes through the stoppers 511 of the multiple reverse box arches 61 in sequence, and is hinged to the second lug 12 of the second side bar 2. In other words, the lower cables 52 wrap around the outer sides of the multiple reverse box arches 61, and the multiple lower cables 52 are tensioned, so that the multiple lower cables 52 and the multiple reverse box arches 61 intersect to form a second-layer mesh structure.

[0088] Preferably, the limiting portion 511 is welded to the forward box-type arch 51 and the reverse box-type arch 61, and a through-hole is provided on the limiting portion 511, through which the upper pull cable 62 and the lower pull cable 52 pass to prevent the upper pull cable 62 from detaching from the forward box-type arch 51 and the lower pull cable 52 from detaching from the reverse box-type arch 61, thereby ensuring that the upper pull cable 62 can limit and fix multiple forward box-type arches 51, and the lower pull cable 52 can limit and fix multiple reverse box-type arches 61.

[0089] like Figure 1 、 Figure 3 and Figure 4As shown, optionally, the lattice arch steel structure further includes vertical rods 9, and the cross-opposing forward box-type arches 51 and the reverse box-type arches 61 are connected by the vertical rods 9. In this embodiment, a plurality of vertical rods 9 are interspersed between the cross-opposing forward box-type arches 51 and the reverse box-type arches 61, with one end of the vertical rod 9 welded to the forward box-type arch 51 and the other end welded to the reverse box-type arch 61. The connection of the forward box-type arches 51 and the reverse box-type arches 61 by the plurality of vertical rods 9 further increases the connection strength between the first layer of the lattice structure and the second layer of the lattice structure, thereby improving the rigidity and strength of the entire lattice arch steel structure and enhancing the load-bearing capacity.

[0090] like Figure 9 As shown, this embodiment also provides a construction method for a lattice shell arch steel structure, which uses a sliding tool 10 to move the lattice shell arch steel structure from the assembly area and install it in a preset installation position, specifically including the following steps:

[0091] S1. Model and calculate the lattice shell arch steel structure using numerical simulation methods according to construction conditions to obtain a lattice shell arch steel structure that meets lifting requirements;

[0092] S2. Set up a sliding steel beam 400 in the assembly area, install a first guide rail 401 on the sliding steel beam 400, and install a second guide rail 303 and a patching guide rail 304 on the first concrete beam 301 and the second concrete beam 302 at the preset installation position;

[0093] S3, assembling the lattice arch steel structure in the assembly area, and installing the sliding tool 10 on the first support assembly 7 and the second support assembly 8 of the lattice arch steel structure;

[0094] S4, driving the sliding tool 10 to slide on the first guide rail 401 and the second guide rail 303 to move the lattice shell arch steel structure from the assembly area to the preset installation position;

[0095] S5. Remove the patching guide rail 304 and fix the first support assembly 7 and the second support assembly 8 on the first concrete beam 301 and the second concrete beam 302, and then remove the sliding tool 10.

[0096] By repeating the above steps, multiple lattice shell arch steel structures can be slid to the preset installation positions in sequence and assembled as a whole to form the required building structure.

[0097] The construction method of the lattice arch steel structure provided in this embodiment can realize the sliding and overall assembly of multiple lattice arch steel structures in sequence, thereby avoiding the use of large-scale lifting equipment for high-altitude bulk assembly, effectively reducing construction costs and installation risks. At the same time, the overall assembly can ensure the installation positioning accuracy of the steel structure, improve the stability of the building structure, and ensure construction quality.

[0098] The construction conditions in step S1 include the construction environment, the building structure form, and the performance of the lifting equipment configured at the construction site. After determining the construction plan, computer simulation technology is used to model and calculate to obtain a lattice arch steel structure that meets the lifting requirements. That is, it is ensured that the weight of each lifting component of the lattice arch steel structure is less than the maximum limit value of the on-site lifting equipment, and that the lifting equipment can meet the use requirements when assembling the lattice arch steel structure. Preferably, the weight of each lifting component of the lattice arch steel structure does not exceed 80% of the maximum limit value of the lifting equipment, ensuring that the lifting equipment has a 20% lifting margin to prevent lifting equipment failure.

[0099] When using computer simulation technology to model and calculate, the three-dimensional coordinate values ​​of each node and end butt joint of the lattice shell arch steel structure in the CAD three-dimensional model are called out and used as the installation control theoretical value of the lattice shell arch steel structure. At the same time, based on its CAD three-dimensional model, the three-dimensional coordinate values ​​of each node and end butt joint of the lattice shell arch steel structure in each assembled state are found out and used as the assembly control theoretical value of the lattice shell arch steel structure, thereby ensuring that each calculated lattice shell arch steel structure meets the architectural structural design requirements.

[0100] When setting up the sliding steel beam 400 in step S2, the sliding steel beam 400 is fixed to a plurality of pre-set steel beam embedded parts 402 in the assembly area. The steel beam embedded parts 402 are preferably PL20×250×700 in size. The sliding steel beam 400 is preferably a sub-shaped box beam with specifications of 800×600×25×30. The steel beam embedded parts 402 and the sliding steel beam 400 are both made of Q355B. Then, the first guide rail 401 is installed along the length direction of the sliding steel beam 400. The first guide rail 401 is a U43 steel rail. Figure 10 and Figure 11 , there are two sliding steel beams 400, which are respectively connected to the first concrete beam 301 and the second concrete beam 302 to form an assembly platform. A plurality of guide rail embedded parts 305 are pre-set along the length direction of the first concrete beam 301 and the second concrete beam 302. Preferably, a guide rail embedded part 305 is set every 1 meter, and the specifications of the guide rail embedded part 305 are PL20×250×700. The second guide rail 303 and the embedded guide rail 304 are installed on the guide rail embedded parts 305 of the first concrete beam 301 and the second concrete beam 302. Specifically, Figure 12 and Figure 13As shown, the second guide rail 303 and the patching guide rail 304 are arranged adjacent to each other, that is, a patching guide rail 304 is connected between the second guide rails 303 at both ends. The first support assembly 7 or the second support assembly 8 is installed at the corresponding position of the patching guide rail 304 on the first concrete beam 301 and the second concrete beam 302. The patching guide rail 304 and the second guide rail 303 are detachably connected by fasteners 306, so that after the lattice arch steel structure slides into place, the patching guide rail 304 can be removed and the first support assembly 7 or the second support assembly 8 can be fixed to the first concrete beam 301 and the second concrete beam 302. Support embedded parts 501 are correspondingly provided on the first concrete beam 301 and the second concrete beam 302 for welding the support 71 of the first support assembly 7 or the second support assembly 8.

[0101] like Figure 14 As shown, preferably, the fastener 306 includes a long connecting plate and a plurality of fastening bolts, one end of the long connecting plate is connected to the second guide rail 303 by the fastening bolts, and the other end is connected to the embedded guide rail 304 by the fastening bolts. The bolt connection is easy to operate when disassembling.

[0102] The steps of assembling the lattice shell arch steel structure in step S3 include:

[0103] (1) Connect the ends of the upper chord 31 and the lower chord 32 of the first end truss 3 to the fourth connecting piece 77 of the second support assembly 8 at one end of the first side bar 1 and the second side bar 2, respectively. Connect the ends of the upper chord 31 and the lower chord 32 of the second end truss 4 to the fourth connecting piece 77 of the second support assembly 8 at the other end of the first side bar 1 and the second side bar 2, respectively.

[0104] (2) The two ends of the forward box-shaped arch 51 are respectively connected to the first connecting piece 74 of the first support assembly 7 on the first side bar 1, the first connecting piece 74 of the first support assembly 7 on the second side bar 2, the third connecting piece 76 on the second support assembly 8, the connecting corbel 311 of the upper chord 31 of the first end truss 3, or the connecting corbel 311 of the upper chord 31 of the second end truss 4; the two ends of the reverse box-shaped arch 61 are respectively connected to the second connecting piece 75 of the first support assembly 7 on the first side bar 1, the second connecting piece 75 of the first support assembly 7 on the second side bar 2, the third connecting piece 76 on the second support assembly 8, the connecting corbel 311 of the lower chord 32 of the first end truss 3, or the connecting corbel 311 of the lower chord 32 of the second end truss 4;

[0105] (3) One end of a portion of the upper cable 62 is hinged to the first lug 11 of the first side bar 1, and the other end sequentially passes through the limiting portions 511 of the plurality of forward box-shaped arches 51, and is hinged to the first lug 11 of the second side bar 2 or the connecting lug 312 of the upper chord 31 of the second end truss 4; one end of another portion of the upper cable 62 is hinged to the connecting lug 312 of the upper chord 31 of the first end truss 3, and the other end sequentially passes through the limiting portions 511 of the plurality of forward box-shaped arches 51, and is hinged to the first lug 11 of the second side bar 2;

[0106] (4) One end of a portion of the lower pull cable 52 is hinged to the second ear plate 12 of the first side bar 1, and the other end passes through the limiting portions 511 of the multiple reverse box-shaped arches 61 in sequence, and is hinged to the second ear plate 12 of the second side bar 2 or the connecting ear plate 312 of the lower chord 32 of the first end truss 3; one end of another portion of the lower pull cable 52 is hinged to the connecting ear plate 312 of the lower chord 32 of the second end truss 4, and the other end passes through the limiting portions 511 of the multiple reverse box-shaped arches 61 in sequence, and is hinged to the second ear plate 12 of the second side bar 2;

[0107] (5) After passing the “three-inspection system” inspection, the upper chord 31 and the lower chord 32 are welded to the fourth connecting piece 77, the forward box arch 51 is welded to the first connecting piece 74 and the third connecting piece 76, and the reverse box arch 61 is welded to the second connecting piece 75 and the third connecting piece 76;

[0108] (6) The upper cable 62 and the lower cable 52 are tensioned according to the pre-designed tensioning scheme. Specifically, "three-level" tensioning is performed at 30%, 70%, and 105% of the designed tensioning value, respectively, until the tensioning is completed. At this point, the lattice shell arch steel structure is assembled.

[0109] In step S4, the sliding process of the lattice shell arch steel structure can be referred to Figure 10 and Figure 11 , Figure 10 This is a structural diagram of the lattice shell arch steel structure after it is assembled in the assembly area. Figure 11 A schematic diagram is provided of the lattice shell arch steel structure after it is moved from the assembly area to the preset installation position.

[0110] Specifically, if Figure 12As shown, in this embodiment, the sliding fixture 10 is installed on the second support assembly 8, and the sliding fixture 10 is driven to slide on the first guide rail 401 and the second guide rail 303 by the pushing device 20, so as to push each lattice arch steel structure from the assembly area to the preset installation position, and then the entire structure is assembled to form a building structure. During the sliding process of the lattice arch steel structure, the sliding state of the lattice arch steel structure is monitored to ensure that the left and right sides thereof slide synchronously to avoid deviation from the first guide rail 401 and the second guide rail 303. Preferably, a limiting device is provided at the end point of the preset installation position to prevent the lattice arch steel structure from sliding excessively.

[0111] Optionally, when installing the sliding fixtures 10, a sliding fixture 10 is installed on both sides of each first support assembly 7, and a sliding fixture 10 is also installed on both sides of the second support assembly 8 close to the sliding steel beam 400, and the pushing device 20 is connected to the sliding fixture 10 close to the sliding steel beam 400. The second support assembly 8 far from the sliding steel beam 400 is installed with a sliding fixture 10 only on the side close to the first support assembly 7.

[0112] like Figure 12 As shown, preferably, a sliding reinforcement rod 107 is provided between two adjacent sliding fixtures 10. In the process of pushing the sliding fixture 10 to move, the sliding reinforcement rod 107 plays the role of transmitting force, which can ensure that the two adjacent sliding fixtures 10 move synchronously, so that the entire lattice arch steel structure can slide smoothly and prevent it from deviating from the track, thereby ensuring that the lattice arch steel structure can be accurately positioned and reducing the installation error rate.

[0113] like Figure 15 As shown, preferably, the pushing device 20 includes a driving member 201, a rail clamp 202 and a pushing lug 203. The rail clamp 202 can slide with the first guide rail 401 and the second guide rail 303. The pushing lug 203 is installed on the sliding fixture 10. The driving member 201 is set on the rail clamp 202. The output end of the driving member 201 is connected to the pushing lug 203 to drive the sliding fixture 10 to slide on the first guide rail 401 and the second guide rail 303, pushing the lattice arch steel structure from the assembly area to the preset installation position. The driving member 201 is preferably a pushing cylinder, but can also be an electric cylinder, etc.

[0114] In this embodiment, Figure 16 and Figure 17As shown, the sliding fixture 10 includes a support beam 101, on which a longitudinal reinforcement 102 is provided. Stiffening ribs 103 are provided on opposite sides of the longitudinal reinforcement 102, and the bottom of the stiffening ribs 103 is connected to the support beam 101. The stiffening ribs 103 increase the connection strength between the longitudinal reinforcement 102 and the support beam 101, and can prevent the longitudinal reinforcement 102 from deforming during the process of pushing the lattice shell arch steel structure. In this embodiment, the cross-section of the longitudinal reinforcement 102 is I-shaped, and the upper and lower wing plates of the longitudinal reinforcement 102 that abut against the pillar 72 are recessed inward to form an arc transition surface, which plays a limiting role. The curvature of the arc transition surface matches the curvature of the outer peripheral surface of the pillar 72, so that the arc transition surface can fit the outer peripheral surface of the pillar 72, preventing the sliding fixture 10 from detaching from the first support assembly 7 or the second support assembly 8 during the pushing process.

[0115] Further preferably, the support beam 101 is an I-beam, and a plurality of reinforcing ribs 104 are arranged at intervals on both sides of the web of the I-beam along the length direction. The top end of each reinforcing rib 104 is connected to the upper wing plate of the I-beam, and the lower end is connected to the lower wing plate of the I-beam, thereby increasing the rigidity and strength of the support beam 101 and preventing it from deformation and damage.

[0116] When installing the push lug 203 on the sliding fixture 10, first weld the limiting plate 105 onto the reinforcing rib 104. The limiting plate 105 is attached to the reinforcing rib 104 and extends outward. The limiting stiffening rib 106 is welded onto the limiting plate 105, and the limiting stiffening rib 106 is perpendicular to the limiting plate 105. Then, a flat plate is welded between the reinforcing rib 104 and the upper flange of the I-beam, and the push lug 203 is welded to the flat plate. The flat plate is parallel to the web of the I-beam, and the side of the flat plate facing away from the web of the I-beam is in contact with the limiting stiffening rib 106, that is, the flat plate is sandwiched between the limiting stiffening rib 106 and the reinforcing rib 104. The limiting plate 105 and the limiting stiffening rib 106 limit the push lug 203.

[0117] like Figure 18 As shown, optionally, a first limit block 108 and a second limit block 109 are spaced apart at the bottom of the support beam 101, and the first guide rail 401 or the second guide rail 303 is clamped between the first limit block 108 and the second limit block 109. The first limit block 108 and the second limit block 109 limit the sliding fixture 10 to prevent the sliding fixture 10 from deviating from the first guide rail 401 or the second guide rail 303 during the pushing process, thereby further improving the sliding stability of the lattice arch steel structure.

[0118] In step S5, refer to Figure 19 and Figure 20 , Figure 19 FIG. 1 is a schematic diagram showing the first support assembly 7 when the patching guide rail 304 is not removed. Figure 20The figure shows a schematic diagram of the first support assembly 7 being fixed to the first concrete beam 301 after the patching guide rail 304 is removed. Specifically, after the lattice arch steel structure is moved to the preset installation position, it is measured and fine-tuned. If it meets the installation requirements, the fastener 306 is released and the patching guide rail 304 is removed from the second guide rail 303. Then, the support 71 is used to weld the support column 72 to the preset support embedded parts 501 on the first concrete beam 301 and the second concrete beam 302 to fix the first support assembly 7 and the second support assembly 8 to the first concrete beam 301 and the second concrete beam 302. The structure of the support embedded parts 501 is shown in FIG. Figure 21 As shown, a plurality of anchor bars 502 are welded below the support embedded part 501. When the first concrete beam 301 and the second concrete beam 302 are cast, the anchor bars 502 are inserted into the concrete. After the first concrete beam 301 and the second concrete beam 302 are formed, the anchor bars 502 are embedded in the first concrete beam 301 and the second concrete beam 302, thereby fixing the support embedded part 501 on the first concrete beam 301 and the second concrete beam 302, so as to facilitate the subsequent installation of the first support assembly 7 and the second support assembly 8.

[0119] In this embodiment, preferably, the support 71 is a spherical support. Spherical supports have a strong load-bearing capacity and can, on the one hand, transmit the support reaction forces of the superstructure, including the vertical and horizontal forces caused by dead loads and live loads; on the other hand, they can ensure the self-deformation of the structure under the effects of factors such as live loads, temperature changes, concrete shrinkage and creep, so that the actual stress conditions of the superstructure and substructure conform to the static diagram of the structure.

[0120] After the first support assembly 7 and the second support assembly 8 are installed in place, the corresponding sliding fixtures 10 and the jacking device 20 are removed to install the entire lattice arch steel structure in place.

[0121] Finally, after passing the “three-inspection system” inspection, the gap between the support 72 and the spherical support is welded. After the welding is completed and passed the inspection, all the sliding steel beams 400 and the first guide rail 401 are removed.

[0122] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A lattice shell arch steel structure, characterized in that: include: The frame structure comprises a first side bar (1), a first end truss (3), a second side bar (2) and a second end truss (4) connected end to end; A plurality of forward arch components (5) and a plurality of reverse arch components (6), wherein the plurality of forward arch components (5) and the plurality of reverse arch components (6) are arranged crosswise, one end of the forward arch component (5) is connected to the first side bar (1), and the other end is connected to the second side bar (2) or the first end truss (3), or one end of the forward arch component (5) is connected to the second end truss (4), and the other end is connected to the second side bar (2); One end of the reverse arch component (6) is connected to the first side bar (1), and the other end is connected to the second side bar (2) or the second end truss (4), or one end of the reverse arch component (6) is connected to the first end truss (3), and the other end is connected to the second side bar (2); Each of the forward arch components (5) comprises a forward box-shaped arch (51) and a lower cable (52) that are opposite to each other in the upper and lower directions, and each of the reverse arch components (6) comprises an upper cable (62) and a reverse box-shaped arch (61) that are opposite to each other in the upper and lower directions, wherein the upper cable (62) is wrapped around the outer sides of the plurality of forward box-shaped arches (51), and the lower cable (52) is wrapped around the outer sides of the plurality of reverse box-shaped arches (61); It also includes a first support assembly (7) and a second support assembly (8), wherein a plurality of the first support assemblies (7) are spaced apart along the length direction on the first side bar (1) and the second side bar (2), the plurality of the first support assemblies (7) of the first side bar (1) are fixed on a first concrete beam (301) at a preset installation position, and the plurality of the first support assemblies (7) of the second side bar (2) are fixed on a second concrete beam (302) at a preset installation position, and the intersecting forward box-shaped arches (51) and the reverse box-shaped arches (61) are connected to the same first support assembly (7) accordingly; The ends of the first side bar (1) and the second side bar (2) are both provided with the second support assembly (8), and the first end truss (3) and the second end truss (4) are both connected to the first side bar (1) and the second side bar (2) via the second support assembly (8); The first end truss (3) and the second end truss (4) both include an upper chord (31), a lower chord (32), and a web (33) sandwiched between the upper chord (31) and the lower chord (32); the upper chord (31) and the lower chord (32) are both provided with a connecting bracket (311) and a connecting ear plate (312); the forward box arch (51) is connected to the connecting bracket (311) of the upper chord (31); the reverse box arch (61) is connected to the connecting bracket (311) of the lower chord (32); the upper cable (62) is hinged to the connecting ear plate (312) of the upper chord (31); and the lower cable (52) is hinged to the connecting ear plate (312) of the lower chord (32); It also includes a vertical upright rod (9), and the cross-opposite forward box-shaped arch (51) and the reverse box-shaped arch (61) are connected by the vertical upright rod (9); The first support assembly (7) and the second support assembly (8) both comprise a support (71) and a support column (72) arranged on the support (71); a mounting plate (73) is arranged on the support column (72); a first connecting member (74) and a second connecting member (75) are arranged on the mounting plate (73) of the first support assembly (7); the forward box-shaped arch (51) is connected to the first connecting member (74); and the reverse box-shaped arch (61) is connected to the second connecting member (75); A limiting portion (511) is provided on each of the forward box-shaped arches (51) and each of the reverse box-shaped arches (61); a first ear plate (11) and a second ear plate (12) are provided on each of the first side bar (1) and the second side bar (2); one end of the upper cable (62) is hinged to the first ear plate (11) of the first side bar (1), and the other end sequentially passes through the limiting portions (511) of the plurality of forward box-shaped arches (51) and is hinged to the first ear plate (11) of the second side bar (2) or the connecting ear plate (312) of the upper chord (31) of the second end truss (4); or one end of the upper cable (62) is hinged to the connecting ear plate (312) of the upper chord (31) of the first end truss (3), and the other end sequentially passes through the limiting portions (511) of the plurality of forward box-shaped arches (51) and is hinged to the first ear plate (11) of the second side bar (2); One end of the lower pull cable (52) is hinged to the second ear plate (12) of the first side bar (1), and the other end passes through the limiting parts (511) of multiple reverse box arches (61) in sequence, and is hinged to the second ear plate (12) of the second side bar (2) or the connecting ear plate (312) of the lower chord bar (32) of the first end truss (3), or one end of the lower pull cable (52) is hinged to the connecting ear plate (312) of the lower chord bar (32) of the second end truss (4), and the other end passes through the limiting parts (511) of multiple reverse box arches (61) in sequence, and is hinged to the second ear plate (12) of the second side bar (2).

2. The lattice shell arch steel structure according to claim 1, characterized in that: A third connecting member (76) and two fourth connecting members (77) arranged at an angle are provided on the mounting plate (73) of the second support assembly (8), wherein the third connecting member (76) is connected to the forward box-shaped arch (51) or the reverse box-shaped arch (61), one of the fourth connecting members (77) is connected to the upper chord (31), and the other fourth connecting member (77) is connected to the lower chord (32).

3. The lattice shell arch steel structure according to claim 2, characterized in that: A fifth connecting member (78) is provided on the side of the mounting plate (73) of the first support assembly (7) facing away from the first connecting member (74), and on the side of the mounting plate (73) of the second support assembly (8) facing away from the third connecting member (76), and the fifth connecting member (78) is connected to the first side bar (1) or the second side bar (2).

4. A construction method for a lattice shell arch steel structure, applied to the lattice shell arch steel structure according to any one of claims 1 to 3, characterized in that: The lattice shell arch steel structure is moved from the assembly area and installed at a preset installation position by a sliding tool (10), specifically comprising the following steps: According to the construction conditions, the lattice shell arch steel structure is modeled and calculated using the numerical simulation method to obtain a lattice shell arch steel structure that meets the lifting requirements; A sliding steel beam (400) is set up in the assembly area, a first guide rail (401) is installed on the sliding steel beam (400), and a second guide rail (303) and a patching guide rail (304) are installed on the first concrete beam (301) and the second concrete beam (302) at the preset installation position; Assembling the lattice arch steel structure in the assembly area, and installing the sliding tool (10) on the first support assembly (7) and the second support assembly (8) of the lattice arch steel structure; Driving the sliding tool (10) to slide on the first guide rail (401) and the second guide rail (303) to move the lattice shell arch steel structure from the assembly area to a preset installation position; The patching guide rail (304) is removed and the first support assembly (7) and the second support assembly (8) are fixed on the first concrete beam (301) and the second concrete beam (302), and then the sliding fixture (10) is removed.

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