Parallel loading wing type large-span cantilever truss structure system and mounting method thereof

Abstract

The invention relates to a parallel loading wing type large-span cantilever truss structure system and a mounting method thereof, the structure system is formed by connecting a plurality of loading wing type trusses which are arranged along the outer edge of a main body structure in parallel at intervals and unfolding wing type trusses on the outermost side in parallel, and the trusses are connected into a space whole through horizontal connecting components. The wing carrying type truss comprises a vertical bearing part and a horizontal overhanging part which are inclined from inside to outside, a wing carrying structure is formed, and overhanging loads are efficiently and obliquely transmitted to a main body structure. Reinforcing components such as three-fork web members are arranged at the ends of the wing-unfolding type trusses, and the rigidity of the ends is enhanced. The mounting method adopts sequential construction of pushing truss by truss from one end to the other end and synchronously connecting horizontal members. The problems that a traditional solid-web cantilever beam is huge in dead weight, insufficient in rigidity and large in building space occupation are solved, and the large-span solid-web cantilever beam has the advantages of being reasonable in stress, small in steel consumption, large in spanning capacity and wide in building space and is suitable for large-span cantilever buildings such as stadiums and terminal buildings.

Description

Technical Field

[0001] This invention relates to the field of building engineering structural technology, specifically to a column-free cantilever structure system suitable for large-span, large-space public buildings and its installation method. Background Technology

[0002] In modern stadiums, airport terminals, theaters, and other large public buildings, large-span cantilever structures are often required to achieve magnificent architectural forms and spacious, column-free interiors. Traditional cantilever structure designs typically employ a combination of vertical columns and horizontal cantilever beams. However, for cantilever requirements with extremely large spans, the traditional solid-web cantilever beam design has significant drawbacks: First, its immense weight. To meet load-bearing and stiffness requirements, the cross-sectional dimensions of solid-web cantilever beams are extremely large, resulting in a substantial increase in structural weight and placing a heavy burden on the foundation and main structure. Second, ensuring stiffness is difficult. Under the weight of the beam and external loads, controlling the deflection (downward deformation) of large-span cantilever beams is extremely challenging, affecting structural safety and functionality. Third, it restricts building space. The enormous beam height encroaches on valuable lower building space, making the space feel oppressive, contradicting the initial design principles of openness and transparency.

[0003] Therefore, there is an urgent need for a new type of large-span cantilever structure system that is rationally stressed, lightweight, highly rigid, and can maximize the release of building space. Summary of the Invention

[0004] The purpose of this invention is to provide a parallel-loaded wing type large-span cantilever truss structure system and its installation method, in order to solve the technical problems of excessive self-weight, insufficient stiffness, and low building space utilization of traditional solid web cantilever beams in large-span applications.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] A parallel wing-type large-span cantilever truss structure system includes multiple wing-type trusses arranged parallel and spaced along the outer edge of the main structure and an outermost spandrel truss; adjacent wing-type trusses and wing-type trusses and spandrel trusses are connected into a spatial whole by horizontal tie rods, horizontal roof truss beams and horizontal reinforcing diagonal rods. The wing-type truss is installed on the columns of the main structure and includes a load-bearing part and a cantilever part. The load-bearing part is a vertical truss structure, and both the inner and outer chords of the load-bearing part are inclined members from the inside out. The cantilever part is a horizontal truss structure, installed on top of the load-bearing part, and the outer end of the cantilever part protrudes beyond the outer side of the load-bearing part. The cantilever part is a truss structure that gradually slopes outward from the inside, and the top surface of the cantilever part is an inclined surface that is higher on the inside and lower on the outside, and the bottom surface of the cantilever part is an inclined surface that is lower on the inside and higher on the outside. The wing-shaped truss is located at the end of the cantilever structure and is arranged parallel to and spaced apart from the outermost wing-shaped truss; the root of the wing-shaped truss is connected to the main structure through the root uprights and horizontal connecting ends, and the wing-shaped truss is provided with a three-pronged web reinforcement member inside the wing-shaped truss.

[0007] Preferably, the lower end of the wing-type truss is provided with a vertical insertion section; a horizontal limiting plate is provided on the wing-type truss above the insertion section; the insertion section is inserted into the corresponding column of the main structure and connected to the column by welding; a horizontal connecting beam is provided on the side of the wing-type truss close to the main structure; the wing-type truss is connected to the main structure through the horizontal connecting beam.

[0008] Preferably, the load-bearing portion comprises an inner chord near the main structure, an outer chord far from the main structure, diagonal web members of the load-bearing portion, and horizontal web members of the load-bearing portion, forming a stable triangular or trapezoidal truss structure.

[0009] Preferably, the cantilevered portion includes an upper chord, a lower chord, a straight web member, and an oblique web member. The upper ends of the outer and inner chords of the cantilevered portion are smoothly connected to the load-bearing portion. A cantilevered three-pronged web member is provided between the upper and lower chords of the cantilevered portion. The cantilevered three-pronged web member includes two first upper oblique members and one first lower oblique member. The lower ends of the two first upper oblique members are respectively connected to the upper ends of the first lower oblique member, and the upper ends of the two first upper oblique members are respectively connected to the upper chord of the cantilevered portion. The lower end of the first lower oblique member is connected to the lower chord of the cantilevered portion. A connecting beam is provided between the oblique web member and the cantilevered three-pronged web member and / or between the straight web member and the cantilevered three-pronged web member.

[0010] Preferably, the wing-shaped truss is a trapezoidal truss structure, including a lower chord, an upper chord, straight web members, diagonal web members, connecting beams, and three-pronged web members and root uprights. The root uprights are vertically connected between the lower chord and the upper chord of the wing-shaped truss, near the main structure. The straight web members and diagonal web members are both connected between the lower chord and the upper chord of the wing-shaped truss. The three-pronged web members are connected between the lower chord and the upper chord of the wing-shaped truss. Between the upper chord members of the truss, the three-pronged web members of the spandrel truss include two second upper diagonal members and one second lower diagonal member; the lower ends of the two second upper diagonal members are respectively connected to the upper ends of the second lower diagonal members, and the upper ends of the two second upper diagonal members are respectively connected to the upper chord members of the spandrel truss; the lower end of the second lower diagonal member is connected to the lower chord members of the spandrel truss; there are multiple spandrel truss connecting beams, which are respectively connected between the root uprights and the diagonal web members of the spandrel truss and / or between the diagonal web members of the spandrel truss and the three-pronged web members of the spandrel truss and / or between the three-pronged web members of the spandrel truss and the straight web members of the spandrel truss.

[0011] An installation method for a parallel-loaded wing type large-span cantilever truss structure system includes the following steps: Step 1: Assemble the wing-type truss and the spandrel-type truss; Step 2, Installation of the first wing-type truss: Starting from the predetermined starting end, hoist the first wing-type truss and initially secure the load-bearing part at the bottom of the wing-type truss to the columns of the main structure; Step 3, Installation and connection of the second wing truss: hoist the second wing truss and connect the load-bearing part at the bottom of the wing truss to the columns of the main structure; then, between the two installed wing trusses, install horizontal connecting rods and horizontal roof truss beams from bottom to top. Step 4, proceed in a cycle: Repeat step 3, install the third wing truss, and connect it to the second truss with horizontal tie rods and horizontal roof truss beams; and so on, proceeding forward one truss at a time until all wing trusses are installed; Step 5, End Closure: Hoist the wing-type truss and connect its root to the main structure via root uprights and horizontal connecting ends; then, between the last wing-type truss and the wing-type truss, install all horizontal connecting rods and horizontal roof truss beams from bottom to top to complete the closure installation of the entire cantilever structure system.

[0012] Preferably, the assembly of the wing-type truss includes the following steps: Step 1.1a, Assemble the load-bearing part, and connect the diagonal web members and horizontal web members of the load-bearing part to the inner chord members and outer chord members respectively; Step 1.2a: Install the lower chord of the cantilever section, and connect the lower chord of the cantilever section to the upper ends of the inner and outer chords of the load-bearing section respectively; Step 1.3a: Install the straight web members, diagonal web members, three-pronged web members, and connecting beam of the cantilever section; connect the straight web members, diagonal web members, and three-pronged web members of the cantilever section to the lower chord of the cantilever section respectively. Step 1.4a: Install the upper chord of the cantilever section and connect the upper chord to the top of the straight web member, the diagonal web member, and the three-pronged web member of the cantilever section.

[0013] Preferably, the assembly of the wing-type truss includes the following steps: Step 1.1b: Connect the lower chord and upper chord of the wing truss to the root support respectively; Step 1.2b: Install the straight web members, diagonal web members, and three-pronged web members of the spandrel truss respectively. The straight web members, diagonal web members, and three-pronged web members of the spandrel truss are all welded to the upper chord and lower chord of the spandrel truss. Step 1.3b: Install the spandrel truss connecting beam.

[0014] Preferably, in step two, after the wing-type truss is lifted, the plug-in section is inserted into the corresponding column of the main structure and connected to the column by welding. Then, the wing-type truss is connected to the main structure through a horizontal connecting beam.

[0015] Compared with the prior art, the present invention has the following features and beneficial effects.

[0016] 1. The truss system of this invention is lightweight, has a large cross-sectional height, and its overall bending stiffness is far superior to that of solid web beams, enabling it to easily achieve ultra-large span cantilever structures with excellent deformation control. Furthermore, the truss members are flexibly arranged, allowing for the creation of a transparent, barrier-free space in the central area, perfectly meeting the functional and aesthetic needs of large-space public buildings.

[0017] 2. The wing-type truss of this invention is clearly divided into a load-bearing section and a cantilever section. Its enormous structural height is concentrated in the load-bearing section (i.e., the vertical triangular or trapezoidal truss area at the root). This area is close to the columns of the main structure, equivalent to a rigid "base". The outward-extending cantilever section, although also a truss, has a lower chord that slopes upwards from the inside. Near the root of the building, the structural height is at its maximum to meet the load-bearing requirements; however, as it moves outwards towards the cantilever end, the lower chord gradually rises, thus forming a gradually opening, unobstructed fan-shaped or trapezoidal clearance area below the cantilever section. This provides great flexibility for building layout, such as the rear rows of the auditorium, walkways, and skylights. At the same time, multiple wing-type trusses of this invention are arranged in parallel and connected into a whole by horizontal connecting rods and horizontal roof truss beams, and finally sealed with wing-type trusses. Through "parallel connection" and "wing extension", multiple planar trusses are combined into a spatial box structure. Loads can be spatially distributed among all trusses via horizontal members (connecting rods, reinforcing diagonal braces), forming a "whole-body load-bearing structure." This eliminates the need for any columns beneath the cantilever area, achieving a truly large-span column-free space. The wing-type truss, located on the outermost side, not only serves an aesthetic purpose of edge sealing but also strengthens the end rigidity through its internal "triangular web members," preventing excessive deformation at the cantilever end due to concentrated stress, thus ensuring the flatness and safety of the space at the far end.

[0018] 3. This invention features a rational stress distribution and high construction efficiency. It transfers the cantilever load to the root of the main structure through the load-bearing component, avoiding the enormous bending moment effect of traditional cantilever beams. Specifically, the structural system of this invention cleverly transforms the traditional "cantilever beam bending" mode into a "space truss axial force transmission" mode through multiple mechanisms: "inclined compression of the load-bearing component, three-pronged branching of the cantilever section, end-wing locking, and coordinated horizontal components." The truss structure fully utilizes the axial force performance of the material, saving steel. Furthermore, this characteristic of short force transmission path and high force efficiency is the fundamental reason why it can achieve large spans, light weight, high stiffness, and free up building space. Simultaneously, the free end of the cantilever structure in this invention often experiences the greatest deformation. The three-pronged web members and connecting beams inside the wing-shaped truss form a dense network of members, greatly increasing the integrity of the weak free side at the cantilever end, enabling it to better resist torsion and vibration caused by wind loads and earthquakes.

[0019] 4. The installation method of progressive advancement and real-time connection proposed in this invention ensures that the installed parts always form a stable spatial unit during the installation process, making the construction process safe and controllable, and facilitating quality control. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the main structure of the parallel-loaded wing type large-span cantilever truss structure system of the present invention.

[0022] Figure 2 This is a schematic diagram of the parallel wing-type large-span cantilever truss structure system of the present invention, which is set along the outer edge of the main structure.

[0023] Figure 3 This is a front structural diagram of the wing-type truss in this invention.

[0024] Figure 4 This is a three-dimensional structural diagram of the wing-type truss in this invention.

[0025] Figure 5 This is a schematic diagram of the wing-type truss in this invention.

[0026] Figure 6 This is a schematic diagram of the cantilevered three-pronged brace structure in this invention.

[0027] Figure 7 This is a schematic diagram of the three-pronged web member of the wing truss in this invention.

[0028] Figure reference numerals: 1 – Wing-type truss, 1.1 – Load-bearing section, 1.1.1 – Inner chord, 1.1.2 – Outer chord, 1.1.3 – Diagonal web member of the load-bearing section, 1.1.4 – Horizontal web member of the load-bearing section, 1.2 – Cantilever section, 1.2.1 – Upper chord of the cantilever section, 1.2.2 – Lower chord of the cantilever section, 1.2.3 – Straight web member of the cantilever section, 1.2.4 – Diagonal web member of the cantilever section, 1.2.5 – Triangular web member of the cantilever section, 1.2.5a – First upper diagonal member, 1.2.5b – First lower diagonal member, 1.2.5c – First triangular connection node, 1.2.6 – Cantilever section connection 1.3 - Plug-in section, 1.4 - Limiting plate, 2 - Wing-shaped truss, 2.1 - Wing-shaped truss three-pronged web member, 2.1.1 - Second upper diagonal member, 2.1.2 - Second lower diagonal member, 2.1.3 - Second triangular connection node, 2.2 - Lower chord of wing-shaped truss, 2.3 - Upper chord of wing-shaped truss, 2.4 - Straight web member of wing-shaped truss, 2.5 - Diagonal web member of wing-shaped truss, 2.6 - Wing-shaped truss connecting beam, 2.7 - Root upright, 3 - Horizontal connecting rod, 4 - Horizontal roof truss beam, 5 - Horizontal reinforcing diagonal member, 6 - Horizontal connecting beam, 7 - Main structure, 7.1 - Column, 8 - Horizontal connection end. Detailed Implementation

[0029] like Figure 1-7 As shown, this parallel wing-type large-span cantilever truss structure system includes multiple wing-type trusses 1 arranged parallel and spaced along the outer edge of the main structure 7, and an outermost spandrel truss 2. Adjacent wing-type trusses 1 and wing-type trusses 1 and spandrel trusses 2 are connected into a spatial whole by horizontal connecting rods 3, horizontal roof truss beams 4, and horizontal reinforcing diagonal rods 5. These connect the parallel main trusses at different vertical heights to form a spatial truss system, effectively transferring horizontal loads and ensuring overall stability and spatial collaborative performance.

[0030] The wing-type truss 1 is installed on the column 7.1 of the main structure 7, and includes a load-bearing part 1.1 and a cantilever part 1.2. The load-bearing part 1.1 is a vertical truss structure, and the inner chord 1.1.1 and the outer chord 1.1.2 of the load-bearing part 1.1 are both inclined members from the inside out. The cantilever part 1.2 is a horizontal truss structure, installed on the top of the load-bearing part 1.1, and the outer end of the cantilever part 1.2 cantilevers out of the outer side of the load-bearing part 1.1. The cantilever part 1.2 is a truss structure that gradually slopes outward from the inside out, and the top surface of the cantilever part 1.2 is an inclined surface that is higher inward and lower outward, and the bottom surface of the cantilever part 1.2 is an inclined surface that is lower inward and higher outward. The wing-type truss 1 is the core load-bearing unit of the system. Its lower "load" part is a diagonally arranged load-bearing truss, and its upper end is rigidly connected to the main structure such as the core tube and frame to form a fixed end; its upper "wing" part is a cantilever truss that extends horizontally outward from the top of the load-bearing truss, forming a shape similar to a "bird wing".

[0031] The wing-type truss 2 is located at the end of the cantilever structure and is arranged parallel to and spaced apart from the outermost wing-type truss 1. The root of the wing-type truss 2 is connected to the main structure 7 through the root upright and the horizontal connecting end 8. Inside the wing-type truss 2, there is a wing-type truss three-pronged web member 2.1, which is mainly used to strengthen the rigidity of the cantilever end, resist the deformation of the end, and serve as a support for the outer enclosure structure.

[0032] In this embodiment, the main structure 7 is a steel structure.

[0033] In this embodiment, the lower end of the wing-type truss 1 is provided with a vertical insertion section 1.3; a horizontal limiting plate 1.4 is provided on the wing-type truss 1 above the insertion section 1.3; the insertion section 1.3 is inserted into the column 7.1 corresponding to the main structure 7 and is connected to the column 7.1 by welding; a horizontal connecting beam 6 is provided on the side of the wing-type truss 1 near the main structure 7; the wing-type truss 1 is connected to the main structure 7 through the horizontal connecting beam 6.

[0034] In this embodiment, the load-bearing part includes an inner chord 1.1.1 near the main structure, an outer chord 1.1.2 far from the main structure, a diagonal web member 1.1.3, and a horizontal web member 1.1.4 forming a stable triangular or trapezoidal truss structure, which mainly bears the vertical shear force from the cantilever part 1.2 and transmits it obliquely to the main structure.

[0035] In this embodiment, the cantilever portion 1.2 includes an upper chord 1.2.1, a lower chord 1.2.2, a straight web member 1.2.3, and a diagonal web member 1.2.4. The cantilever portion 1.2 is smoothly connected to the upper ends of the outer chord 1.1.2 and the inner chord 1.1.1 of the supporting portion. A cantilever tripod web member 1.2.5 is provided between the upper chord 1.2.1 and the lower chord 1.2.2. The cantilever tripod web member 1.2.5 includes two first upper diagonal members 1.2.5a and one first lower diagonal member 1.2.5b. The lower ends of the upper inclined rod 1.2.5a are connected to the upper ends of the first lower inclined rod 1.2.5b, and the upper ends of the two first upper inclined rods 1.2.5a are connected to the upper chord 1.2.1 of the cantilever section; the lower ends of the first lower inclined rod 1.2.5b are connected to the lower chord 1.2.2 of the cantilever section; a connecting beam 1.2.6 is provided between the cantilever section inclined web member 1.2.4 and the cantilever three-pronged web member 1.2.5 and / or between the cantilever section straight web member 1.2.3 and the cantilever three-pronged web member 1.2.5, forming a continuous force transmission path, which is the direct mechanical carrier of the cantilever building space.

[0036] In this embodiment, the cantilevered three-pronged brace 1.2.5 also includes a first triangular connection node 1.2.5c; two first upper inclined rods 1.2.5a and one first lower inclined rod 1.2.5b are respectively connected to the first triangular connection node 1.2.5c.

[0037] In this embodiment, the wing-shaped truss is a trapezoidal truss structure, including a lower chord 2.2, an upper chord 2.3, straight web members 2.4, diagonal web members 2.5, a connecting beam 2.6, a three-pronged web member 2.1, and a root upright. The root upright is vertically connected between the lower chord 2.2 and the upper chord 2.3, near the main structure 7. The straight web members 2.4 and diagonal web members 2.5 are both connected between the lower chord 2.2 and the upper chord 2.3. The three-pronged web member 2.1 is connected between the lower chord 2.2 and the upper chord 2.3. Between them, the three-pronged web member 2.1 of the wing truss includes two second upper diagonal members 2.1.1 and one second lower diagonal member 2.1.2; the lower ends of the two second upper diagonal members 2.1.1 are respectively connected to the upper ends of the second lower diagonal member 2.1.2, and the upper ends of the two second upper diagonal members 2.1.1 are respectively connected to the upper chord member 2.3 of the wing truss; the lower end of the second lower diagonal member 2.1.2 is connected to the lower chord member 2.2 of the wing truss; there are multiple wing truss connecting beams 2.6, which are respectively connected between the root upright and the diagonal web member 2.5 of the wing truss and / or between the diagonal web member 2.5 of the wing truss and the three-pronged web member 2.1 of the wing truss and / or between the three-pronged web member 2.1 of the wing truss and the straight web member 2.4 of the wing truss.

[0038] In this embodiment, the three-pronged web member 2.1 of the wing truss also includes a second triangular connection node 2.1.3; two second upper diagonal members 2.1.1 and one second lower diagonal member 2.1.2 are respectively connected to the second triangular connection node 2.1.3.

[0039] An installation method for a parallel wing-type large-span cantilever truss structure system includes the following steps.

[0040] This method involves installing the entire structure piece by piece from one end to the other, with the connecting components installed simultaneously. The specific operation is as follows: Step 1: Assemble the wing-type truss 1 and the spandrel-type truss 2; Step 2, Installation of the first wing-type truss 1: Starting from the predetermined starting end, such as the right end, hoist the first wing-type truss 1, and weld and fix the load-bearing part 1.1 at the bottom of the wing-type truss 1 to the embedded part or pre-installed bracket of the column 7.1 of the main structure 7 to complete the initial embedding. Step 3, Installation and Connection of the Second Wing Truss 1: The second wing truss 1 is hoisted, and the load-bearing portion 1.1 at the bottom of the wing truss 1 is connected to the column 7.1 of the main structure 7. Subsequently, horizontal connecting rods 3 are installed sequentially from bottom to top between the two installed wing trusses 1. Each connecting component is fixed to the corresponding node of the two main trusses by bolts or welding, forming the first stable unit. Step 4, Cyclic Progression: Repeat Step 3, install the third wing-type truss 1, and connect it to the second truss with horizontal connecting rod 3 and horizontal connecting rod 3; and so on, advancing the installation of each truss until all wing-type trusses 1 are installed; Step 5, End Closure: Hoist the wing-type truss 2 and connect the root of the wing-type truss 2 to the main structure 7 through the root uprights and horizontal connecting ends 8; then, between the last wing-type truss 1 and the wing-type truss 2, install all the horizontal connecting rods 3 from bottom to top to complete the closure installation of the entire cantilever structure system.

[0041] In this embodiment, the assembly of the wing-type truss 1 can be pre-completed on a ground jig, including the following steps: Step 1.1a, Assemble the load-bearing part 1.1, and connect the diagonal web members 1.1.3 and the horizontal web members 1.1.4 of the load-bearing part to the inner chord member 1.1.1 and the outer chord member 1.1.2 respectively; A load-bearing inclined web member 1.1.3 is provided between the inner chord member 1.1.1 and the outer chord member 1.1.2, and the load-bearing inclined web member 1.1.3 is welded to the inner chord member 1.1.1 and the outer chord member 1.1.2.

[0042] The horizontal web member 1.1.4 of the load-bearing part 1.1 is welded or bolted to the inner chord member 1.1.1 and the outer chord member 1.1.2.

[0043] Step 1.2a, install the lower chord 1.2.2 of the cantilever section, and connect the lower chord 1.2.2 of the cantilever section to the upper ends of the inner chord 1.1.1 and the outer chord 1.1.2 of the bearing section 1.1 respectively; Step 1.3a: Install the straight web member 1.2.3, the diagonal web member 1.2.4, the three-pronged web member 1.2.5, and the connecting beam 1.2.6 of the cantilever section; connect the straight web member 1.2.3, the diagonal web member 1.2.4, and the three-pronged web member 1.2.5 of the cantilever section to the lower chord member 1.2.2 of the cantilever section respectively. Step 1.4a, install the upper chord 1.2.1 of the cantilever section, and connect the upper chord 1.2.1 of the cantilever section to the top of the straight web member 1.2.3, the diagonal web member 1.2.4, and the three-pronged web member 1.2.5 of the cantilever section.

[0044] If there are secondary members such as reinforcing bars at the junction of the cantilevered part and the load-bearing part, assemble and connect the secondary members such as reinforcing bars.

[0045] In this embodiment, the assembly of the wing-type truss 2 can be pre-completed on a ground jig, including the following steps: Step 1.1b: Connect the lower chord 2.2 and the upper chord 2.3 of the wing truss to the root uprights respectively; Step 1.2b: Install the straight web member 2.4, the diagonal web member 2.5, and the three-pronged web member 2.1 of the wing truss respectively. The straight web member 2.4, the diagonal web member 2.5, and the three-pronged web member 2.1 of the wing truss are all welded to the lower chord member 2.2 and the upper chord member 2.3 of the wing truss. Step 1.3b: Install the wing truss connecting beam 2.6. Weld the wing truss connecting beam 2.6 to the root upright, the wing truss three-pronged web member 2.1, the straight web member, and the wing truss diagonal web member 2.5 to enhance out-of-plane stiffness.

[0046] In this embodiment, in step two, after the wing-type truss 1 is lifted, the plug-in section 1.3 is plugged into the corresponding column 7.1 of the main structure 7 and connected to the column 7.1 by welding. Then, the wing-type truss 1 is connected to the main structure 7 through the horizontal connecting beam 6.

[0047] 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 parallel-loaded wing type large-span cantilever truss structure system, characterized in that: The system includes multiple wing-type trusses (1) arranged parallel to each other along the outer edge of the main structure (7) and a wing-type truss (2) located on the outermost side; adjacent wing-type trusses (1) and wing-type trusses (1) and wing-type trusses (2) are connected into a spatial whole by horizontal connecting rods (3), horizontal roof beams (4) and horizontal reinforcing diagonal rods (5); The wing-type truss (1) is installed on the column (7.1) of the main structure (7), and includes a load-bearing part (1.1) and a cantilever part (1.2); the load-bearing part (1.1) is a vertical truss structure, and the inner chord (1.1.1) and outer chord (1.1.2) of the load-bearing part (1.1) are both inclined members from the inside to the outside; the cantilever part (1.2) is a horizontal truss structure, installed on the top of the load-bearing part (1.1), and the outer end of the cantilever part (1.2) cantilevers out of the outer side of the load-bearing part (1.1); the cantilever part (1.2) is a truss structure that gradually slopes outward from the inside, and the top surface of the cantilever part (1.2) is an inclined surface that is high on the inside and low on the outside, and the bottom surface of the cantilever part (1.2) is an inclined surface that is low on the inside and high on the outside; The wing-shaped truss (2) is located at the end of the cantilever structure and is set parallel to the outermost wing-shaped truss (1). The root of the wing-shaped truss (2) is connected to the main structure (7) through the root upright (2.7) and the horizontal connecting end (8). The wing-shaped truss (2) is provided with a wing-shaped truss three-pronged web member (2.1) reinforcement member inside the wing-shaped truss (2).

2. The parallel-loaded wing type large-span cantilever truss structure system according to claim 1, characterized in that: The lower end of the wing-type truss (1) is provided with a vertical insertion section (1.3); a horizontal limiting plate (1.4) is provided on the wing-type truss (1) above the insertion section (1.3); the insertion section (1.3) is inserted into the corresponding column (7.1) of the main structure (7) and is connected to the column (7.1) by welding; a horizontal connecting beam (6) is provided on the side of the wing-type truss (1) close to the main structure (7); the wing-type truss (1) is connected to the main structure (7) through the horizontal connecting beam (6).

3. The parallel-loaded wing type large-span cantilever truss structure system according to claim 1, characterized in that: The load-bearing part includes an inner chord (1.1.1) near the main structure, an outer chord (1.1.2) far from the main structure, and horizontal web members (1.1.4) forming a stable triangular or trapezoidal truss structure.

4. The parallel-loaded wing type large-span cantilever truss structure system according to claim 1, characterized in that: The cantilever section (1.2) includes an upper chord (1.2.1), a lower chord (1.2.2), a straight web member (1.2.3), and a diagonal web member (1.2.4). The cantilever section (1.2) is smoothly connected to the upper ends of the outer chord (1.1.2) and inner chord (1.1.1) of the load-bearing section. A cantilever three-pronged web member (1.2.5) is provided between the upper chord (1.2.1) and the lower chord (1.2.2) of the cantilever section. The cantilever three-pronged web member (1.2.5) includes two first upper diagonal members (1.2.5a) and one first lower diagonal member. The lower ends of the two first upper diagonal members (1.2.5b) are respectively connected to the upper ends of the first lower diagonal member (1.2.5b), and the upper ends of the two first upper diagonal members (1.2.5a) are respectively connected to the upper chord of the cantilever section (1.2.1); the lower end of the first lower diagonal member (1.2.5b) is connected to the lower chord of the cantilever section (1.2.2); a connecting beam (1.2.6) for the cantilever section is provided between the diagonal web member (1.2.4) and the cantilever three-pronged web member (1.2.5) and / or between the straight web member (1.2.3) and the cantilever three-pronged web member (1.2.5).

5. The parallel-loaded wing type large-span cantilever truss structure system according to claim 1, characterized in that: The wing-shaped truss (2) is a trapezoidal truss structure, including a lower chord (2.2), an upper chord (2.3), straight web members (2.4), diagonal web members (2.5), a connecting beam (2.6), a three-pronged web member (2.1), and a root upright (2.7); the root upright (2.7) is vertically connected to the lower wing truss. Between the chord member (2.2) and the upper chord member (2.3) of the wing truss, on the side closer to the main structure (7); the straight web member (2.4) and the diagonal web member (2.5) of the wing truss are both connected between the lower chord member (2.2) and the upper chord member (2.3) of the wing truss; the three-pronged web member (2.1) of the wing truss is connected between the lower chord member (2.2) and the upper chord member (2.3) of the wing truss, and the three-pronged web member (2.1) of the wing truss includes two second upper diagonal members (2.1.1) and one second lower diagonal member (2.1.2); the lower ends of the two second upper diagonal members (2.1.1) are respectively connected to the upper ends of the second lower diagonal member (2.1.2), and the upper ends of the two second upper diagonal members (2.1.1) are respectively connected to the upper chord member (2.3) of the wing truss; the second lower diagonal member (2.1.2) is connected to the upper chord member (2.3) of the wing truss; The lower end of .1.2) is connected to the lower chord (2.2) of the wing truss; there are multiple wing truss connecting beams (2.6), which are respectively connected between the root upright (2.7) and the diagonal web member (2.5) of the wing truss and / or between the diagonal web member (2.5) of the wing truss and the three-pronged web member (2.1) of the wing truss and / or between the three-pronged web member (2.1) of the wing truss and the straight web member (2.4) of the wing truss.

6. An installation method for a parallel-wing type large-span cantilever truss structure system as described in any one of claims 1-5, characterized in that, The steps include the following: Step 1: Assemble the wing-type truss (1) and the spandrel truss (2). Step 2, installation of the first wing truss (1): Starting from the predetermined starting end, hoist the first wing truss (1) and connect the load-bearing part (1.1) at the bottom of the wing truss (1) to the column (7.1) of the main structure (7) to complete the initial embedding; Step 3, installation and connection of the second wing truss (1): hoist the second wing truss (1) and connect the load-bearing part (1.1) at the bottom of the wing truss (1) to the column (7.1) of the main structure (7); then, between the two installed wing trusses (1), install horizontal connecting rods (3) from bottom to top. Step 4, Cyclic Progression: Repeat Step 3 to install the third wing truss (1) and connect it to the second truss with horizontal connecting rods (3); and so on, advancing the installation of each truss until all wing trusses (1) are installed. Step 5, end closure: hoist the wing-type truss (2), and connect the root of the wing-type truss (2) to the main structure (7) through the root upright (2.7) and the horizontal connecting end (8); then, between the last wing-type truss (1) and the wing-type truss (2), install all the horizontal connecting rods (3) from bottom to top to complete the closure installation of the entire cantilever structure system.

7. The installation method of the parallel wing-type large-span cantilever truss structure system according to claim 6, characterized in that: The assembly of the wing-type truss (1) includes the following steps: Step 1.1a, Assemble the load-bearing part (1.1), and connect the diagonal web members (1.1.3) and horizontal web members (1.1.4) of the load-bearing part to the inner chord (1.1.1) and outer chord (1.1.2) respectively; Step 1.2a, install the lower chord (1.2.2) of the cantilever section, and connect the lower chord (1.2.2) of the cantilever section to the upper ends of the inner chord (1.1.1) and outer chord (1.1.2) of the bearing section (1.1) respectively; Step 1.3a: Install the straight web members (1.2.3), the diagonal web members (1.2.4), the three-pronged web members (1.2.5), and the connecting beam (1.2.6) of the cantilever section. Connect the straight web members (1.2.3), diagonal web members (1.2.4), and three-pronged web members (1.2.5) of the cantilever section to the lower chord (1.2.2) of the cantilever section respectively. Step 1.4a, install the upper chord of the cantilever section (1.2.1), and connect the upper chord of the cantilever section (1.2.1) to the top of the straight web member (1.2.3), the diagonal web member (1.2.4), and the three-pronged web member (1.2.5) of the cantilever section.

8. The installation method of the parallel wing-type large-span cantilever truss structure system according to claim 6, characterized in that: The assembly of the wing-type truss (2) includes the following steps: Step 1.1b: Connect the lower chord (2.2) and upper chord (2.3) of the wing truss to the root support (2.7) respectively; Step 1.2b: Install the straight web member (2.4), diagonal web member (2.5), and three-pronged web member (2.1) of the wing truss respectively. The straight web member (2.4), diagonal web member (2.5), and three-pronged web member (2.1) of the wing truss are all welded to the lower chord (2.2) and upper chord (2.3) of the wing truss. Step 1.3b, install the wing truss connecting beam (2.6).

9. The installation method of the parallel wing-type large-span cantilever truss structure system according to claim 6, characterized in that: In step two, after the wing-type truss (1) is lifted, the plug section (1.3) is plugged into the corresponding column (7.1) of the main structure (7) and connected to the column (7.1) by welding. Then the wing-type truss (1) is connected to the main structure (7) through the horizontal connecting beam (6).

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