Self-stabilizing dendritic column supporting roof overhang structure and construction method thereof

Abstract

The application discloses a self-stabilizing dendritic column supporting roof overhang structure, which comprises a roof supporting structure and a dendritic column supporting roof overhang structure, wherein the roof supporting structure comprises roof supporting columns and roof steel beams; the roof supporting columns are H-shaped, box-shaped or circular, and are fixedly connected with a roof structure; the roof steel beams are H-shaped or box-shaped steel beams, and are detachably connected with the roof supporting column tops through high-strength bolts; the column feet of the roof supporting columns are provided with anti-seismic base plates, and the anti-seismic base plates are fixed with a ground foundation through embedded bolts; the dendritic column supporting roof overhang structure comprises longitudinal overhang beams, transverse overhang beams, roof beam diagonal braces, cross supporting points, dendritic column trunks, dendritic branches, limiting connecting pieces and buffer assemblies.

Description

Technical Field

[0001] This application relates to the field of building structure engineering technology, specifically to a self-stabilizing tree-like column-supported cantilever roof structure and its construction method. Background Technology

[0002] In modern architectural engineering, cantilevered roof structures are widely used in pursuit of unique architectural forms and larger usable spaces. Traditional cantilevered roof structures mostly use single beams or ordinary columns for support, which has problems such as limited cantilever span, insufficient structural stability, and limited load-bearing capacity.

[0003] While existing tree-like column-supported cantilevered roof structures offer some design innovation, they still suffer from numerous shortcomings in terms of structural strength, stability optimization, construction efficiency, and adaptability. For example, the connection between the trunk and branches of some tree-like columns is unreasonable, leading to stress concentration and affecting the overall load-bearing capacity of the structure; the connection between the roof cantilever beams and tree-like columns lacks effective limiting and buffering structures, making them prone to displacement or deformation under external loads; the lack of scientific zoning construction procedures and precision control methods during construction results in inconsistent construction quality and a long construction period; furthermore, existing structures are difficult to adapt to building scenarios with different spans and load requirements, exhibiting poor versatility.

[0004] Therefore, developing a tree-like column-supported cantilever roof structure with high structural strength, good stability, convenient construction, and strong adaptability, as well as its construction method, has become an urgent technical problem to be solved in the current construction engineering field. Summary of the Invention

[0005] This specification provides a self-stabilizing tree-like column-supported cantilever roof structure and its construction method, which solves the problems of unreasonable trunk and branch connection methods in the prior art, resulting in stress concentration, affecting the overall load-bearing capacity and stability of the structure, as well as low construction efficiency.

[0006] The technical solutions provided in the embodiments of this specification are as follows: In a first aspect, embodiments of this application provide a self-stabilizing tree-column supported roof cantilever structure, including a roof support structure and a tree-column supported roof cantilever structure, as detailed below: The roof support structure includes roof support columns and roof steel beams. The roof support columns are H-shaped, box-shaped, or circular and are fixedly connected to the roof structure. The roof steel beams are H-shaped or box-shaped steel beams and are detachably connected to the top of the roof support columns by high-strength bolts. The column bases of the roof support columns are equipped with seismic pads, which are fixed to the foundation structure by pre-embedded bolts. The foundation structure includes, but is not limited to, existing wall structures and ground structures.

[0007] The tree-like column-supported roof cantilever structure includes longitudinal cantilever beams, transverse cantilever beams, roof beam bracing, cross support points, tree-like column trunks, tree-like branches, limiting connectors, and buffer components. The longitudinal cantilever beams are H-shaped or box-shaped steel beams, aligned with the cantilever direction. The transverse cantilever beams are H-shaped or box-shaped steel beams, perpendicular to the roof cantilever direction and parallel to the edge line of the roof support structure. The longitudinal cantilever beams are distributed between the transverse cantilever beams, and the two are fixedly connected by welding.

[0008] The roof beam bracing is made of round tubes or angle steel and is arranged between the roof cantilever beam grid in a cross shape. The two ends of the roof beam bracing are welded to the longitudinal cantilever beam and the transverse cantilever beam respectively through node plates, and several reinforcing holes are provided on the node plates.

[0009] The cross support points are H-shaped or box-shaped steel beams, arranged between the roof cantilever beam grids and directly above the tree-like column trunks, forming a cross shape. A reinforcing web is provided at the intersection of the cross support points, and the reinforcing web is welded and fixed to the cross support points.

[0010] The tree-shaped column trunk is a round steel pipe that grows from the ground foundation. An enlarged foundation is set at the bottom of the tree-shaped column trunk. The enlarged foundation is fixed to the ground foundation by reinforced concrete pouring. The top of the tree-shaped column trunk and the cross support point are detachably connected by a flange. An anti-slip pad is set between the flange and the cross support point.

[0011] The tree-like branches are a number of circular steel pipes, evenly distributed and obliquely connected between the tree-like column trunk and the roof cantilever beam. The lower part of the tree-like branches is fixedly connected to the tree-like column trunk by welding, and the top is connected to the roof cantilever beam by a limiting connector. The limiting connector includes a U-shaped bracket and a fastening bolt. The U-shaped bracket is engaged with the roof cantilever beam, and the fastening bolt passes through the U-shaped bracket and is threaded to the top of the tree-like branches.

[0012] The buffer assembly is located at the connection between the tree-like branches and the roof cantilever beam. The buffer assembly includes a rubber buffer pad and a spring. The rubber buffer pad is fitted between the top of the tree-like branches and the U-shaped bracket. The spring is sleeved on the outside of the fastening bolt, and its two ends abut against the U-shaped bracket and the top of the tree-like branches, respectively.

[0013] Secondly, embodiments of this application provide a construction method for a self-stabilizing tree-like column-supported cantilever roof structure, comprising the following steps: 1. Structural Zoning: Based on the structural form, span size and load distribution, the structure is divided into the roof support structure zone, the first cantilever span zone, the second cantilever span zone, the third cantilever span zone and the transition zone. The transition zone is located between adjacent cantilever span zones.

[0014] 2. Foundation construction: Excavate and compact the ground foundation, pour the enlarged foundation and pre-embedded bolts, ensure that the positional accuracy of the pre-embedded bolts meets the design requirements, and cure to the design strength.

[0015] 3. Install the tree-shaped column trunk and roof support structure: First, install the roof support columns and fix the seismic pads at the column bases to the pre-embedded bolts. Then, install the roof steel beams and connect and fix them to the top of the roof support columns using high-strength bolts. At the same time, install the tree-shaped column trunks, fix the bottom of the tree-shaped column trunks to the enlarged foundation, and correct the verticality of the tree-shaped column trunks.

[0016] 4. Install the tree-like branches on the side of the roof support structure: According to the design location, weld and fix the lower part of the tree-like branches to the tree-like column trunk, and temporarily fix the top to the steel beam of the roof support structure through limiting connectors.

[0017] 5. Install the first cantilever span longitudinal cantilever beam: Use lifting equipment to hoist the first cantilever span longitudinal cantilever beam to the design position and weld it to the steel beam of the roof support structure. At the same time, fix the longitudinal cantilever beam with temporary supports.

[0018] 6. Install the first cantilever span transverse cantilever beam: hoist the transverse cantilever beam to the designed position between the longitudinal cantilever beams, and weld it to the longitudinal cantilever beam to ensure that the transverse cantilever beam is parallel to the edge line of the roof support structure.

[0019] 7. Install the tree-like branches of the first cantilever span: Weld the lower part of the tree-like branches corresponding to the first cantilever span to the tree-like column trunk, and connect the top to the longitudinal cantilever beam or the transverse cantilever beam through the limiting connector. During the installation process, ensure that the inclination angle of the tree-like branches meets the design requirements.

[0020] 8. Install the first cantilever span cantilever beam bracing: hoist the roof beam bracing between the roof cantilever beam grids in a cross shape, and weld the two ends of the bracing to the longitudinal and transverse cantilever beams through the node plates. After welding, remove the temporary support.

[0021] 9. Install the longitudinal cantilever beam and cross support points of the second cantilever span: hoist the longitudinal cantilever beam of the second cantilever span and weld it to the transverse cantilever beam of the first cantilever span. Then install the cross support points directly above the tree-like column trunk and weld them to the longitudinal cantilever beam. Simultaneously weld the reinforcing web at the intersection of the cross support points.

[0022] 10. Install the transverse cantilever beam, tree-like branches, and cantilever beam bracing of the second cantilever span: Repeat steps 6-8 to install the transverse cantilever beam, tree-like branches, and cantilever beam bracing of the second cantilever span in sequence. During the installation process, monitor the settlement of the installed structure.

[0023] 11. Install the longitudinal cantilever beam, transverse cantilever beam, tree-like branches and cantilever beam diagonal bracing of the third cantilever span: Follow the construction process in steps 5-8 to complete the installation of each component of the third cantilever span, and connect the third cantilever span with the second cantilever span into a whole through the transition zone.

[0024] 12. Overall Inspection and Reinforcement: Conduct a comprehensive inspection of the entire structure, including the strength of component connections, structural verticality, flatness, etc. Reinforce any parts that fail the inspection, and finally complete the structural construction.

[0025] The above-mentioned at least one technical solution adopted in the embodiments of this application can achieve the following beneficial effects: by setting anti-seismic pads at the base of the roof support columns and setting enlarged foundations at the bottom of the tree-shaped column trunks, the seismic performance and overall stability of the structure are significantly improved, the structural load is effectively dispersed, and local stress concentration is avoided.

[0026] The longitudinal and transverse cantilever beams are fixed by welding, and the design of the reinforced web of the cross support point and the node plate of the roof beam diagonal brace further enhances the load-bearing capacity of the roof cantilever structure, which can meet the needs of larger cantilever spans.

[0027] The limiting connectors and buffer components installed between the tree-like branches and the roof cantilever beams not only achieve a reliable connection, but also effectively buffer the impact force brought by external loads, reduce structural displacement and deformation, and extend the service life of the structure.

[0028] The construction method adopted a scientific zoning construction strategy, which clarified the construction sequence and key points of each process. With the help of temporary support, precision correction and settlement monitoring, the construction quality was ensured, the construction cycle was shortened and the construction efficiency was improved.

[0029] The connection method of each component of the structure is flexible, and the size of the components, the number of tree-like branches and the tilt angle can be adjusted according to the span and load requirements of different buildings. It has strong versatility and adaptability and is applicable to a wide range of fields. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 is a schematic diagram of the overall three-dimensional structure of the tree-like column-supported roof cantilever structure of the present invention, viewed from below. Figure 2 is a top-view three-dimensional structural schematic diagram of the tree-like column-supported roof cantilever structure of the present invention; Figure 3 is a schematic diagram of the structural tree-like branching process of the roof support installation according to the present invention; Figure 4 This is a schematic diagram of the process of installing the longitudinal cantilever beam of the first cantilever span according to the present invention; Figure 5 is a schematic diagram of the process of installing the transverse cantilever beam of the first cantilever span according to the present invention; Figure 6 is a schematic diagram of the process of installing the first cantilevered cross-tree branch according to the present invention; Figure 7 is a schematic diagram of the process of installing the first cantilever span cantilever beam diagonal brace according to the present invention; Figure 8 is a schematic diagram of the process of installing the longitudinal cantilever beam and cross support points of the second cantilever span according to the present invention. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings. Example

[0033] This embodiment 1 provides a self-stabilizing tree-like column-supported cantilever roof structure. Please refer to [link / reference]. Figure 1 and Figure 2 As shown, the roof support column 1 has a box section, the roof steel beam 2 is an H-shaped steel beam, including a transverse cantilever beam 21 and a longitudinal cantilever beam 22, the tree-like column trunk 3 is a circular steel pipe with a diameter of 500mm, and the tree-like branches 4 are circular steel pipes with a diameter of 200mm, totaling 8, evenly distributed around the tree-like column trunk, with an inclination angle of 60°. The roof beam diagonal bracing 5 is made of angle steel, and the cross support point 6 is an H-shaped steel beam with a reinforcing web thickness of 20mm at its intersection. The U-shaped bracket of the limiting connector (not shown in the figure) is made of Q355 steel, the rubber buffer pad of the buffer assembly is 10mm thick, and the spring elastic coefficient is 50N / mm. Example

[0034] For the construction methods of the above structures, please refer to [link / reference]. Figures 3-8 As shown, the specific steps are as follows: Structural Zoning: The building roof is divided into the roof support structure area (200㎡), the first cantilever span area (8m span, 150㎡), the second cantilever span area (10m span, 180㎡), the third cantilever span area (12m span, 220㎡), and the transition area (2m width).

[0035] Foundation construction: Excavate the ground foundation to the design elevation, compact it, lay a 100mm thick crushed stone cushion layer, pour C30 reinforced concrete enlarged foundation, pre-embed M30 high-strength bolts, and cure for 28 days to the design strength.

[0036] Installation of tree-shaped column trunks and roof support structure: hoist box-type roof support columns, fix seismic pads to pre-embedded bolts, and correct verticality deviation ≤3mm / m; hoist H-shaped roof steel beams, connect and fix them with high-strength bolts, and tighten the bolts to meet design requirements; hoist tree-shaped column trunks, fix them to the enlarged foundation, and control verticality deviation within 2mm / m.

[0037] Install the tree-like branches on the side of the roof support structure: weld the lower part of the tree-like branches to the tree-like column trunk, with a weld height of ≥10mm, and temporarily fix the top to the roof steel beam through a U-shaped bracket.

[0038] Installation of the first cantilever span longitudinal cantilever beam: The H-shaped longitudinal cantilever beam is hoisted by a truck crane, welded to the roof steel beam, and temporary steel supports are installed at 3m intervals.

[0039] Install the first cantilever span transverse cantilever beam: hoist the H-shaped transverse cantilever beam and weld it to the longitudinal cantilever beam, ensuring that the transverse cantilever beam is parallel to the edge line of the roof support structure with a deviation of ≤5mm.

[0040] Install the first cantilevered tree-like branch: weld the lower part of the tree-like branch to the tree-like column trunk, and connect the top to the longitudinal cantilever beam through a U-shaped bracket and fastening bolts. The rubber buffer pad fits tightly, and the spring compression is controlled at 5-8mm.

[0041] Installation of the first cantilever span cantilever beam diagonal bracing: hoist angle steel diagonal bracing, arranged in a cross pattern, fixed by welding through node plates, fill the reinforcement holes of the node plates with welds, and remove temporary supports.

[0042] Install the longitudinal cantilever beam and cross support points of the second cantilever span: hoist the longitudinal cantilever beam and weld it to the transverse cantilever beam of the first cantilever span, install the H-shaped cross support points, weld the reinforcing web, and perform non-destructive testing on the welds.

[0043] Install the second cantilever span transverse cantilever beam, tree-like branches, and cantilever beam diagonal bracing: Repeat steps 6-8. During the installation process, conduct settlement observation after each component connection is completed. The settlement amount should be ≤2mm.

[0044] Install the components of the third cantilever span: Construct according to steps 5-8, and weld the third cantilever span to the second cantilever span through the transition zone to form an integral structure.

[0045] Overall inspection and reinforcement: Ultrasonic testing was used to inspect the weld quality, and the verticality and flatness of the structure were tested to meet the requirements of the "Standard for Acceptance of Construction Quality of Steel Structures" GB50205-2020. Local weld defects were repaired and reinforced to complete the construction.

[0046] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A self-stabilizing tree-like column-supported cantilever roof structure, comprising a roof support structure and a tree-like column-supported cantilever roof structure, characterized in that: The roof support structure includes roof support columns and roof steel beams. The roof support columns are H-shaped, box-shaped, or circular and are fixedly connected to the roof structure. The roof steel beams are H-shaped or box-shaped steel beams and are detachably connected to the top of the roof support columns via high-strength bolts. The column bases of the roof support columns are equipped with seismic pads, which are fixed to the foundation structure via pre-embedded bolts. The tree-like column-supported cantilever roof structure includes longitudinal cantilever beams, transverse cantilever beams, roof beam braces, cross support points, tree-like column trunks, tree-like branches, limiting connectors, and buffer components.

2. The self-stabilizing tree-like column-supported cantilever roof structure according to claim 1, characterized in that: The longitudinal cantilever beams are H-shaped or box-shaped steel beams, in the same direction as the cantilever. The transverse cantilever beams are H-shaped or box-shaped steel beams, perpendicular to the roof cantilever direction and parallel to the edge line of the roof support structure. The longitudinal cantilever beams are distributed between the transverse cantilever beams, and the two are fixedly connected by welding.

3. The self-stabilizing tree-like column-supported cantilever roof structure according to claim 1, characterized in that: The roof beam bracing is made of round tubes or angle steel and is arranged between the roof cantilever beam grid in a cross shape. The two ends of the roof beam bracing are welded to the longitudinal cantilever beam and the transverse cantilever beam respectively through node plates, and several reinforcing holes are provided on the node plates.

4. The self-stabilizing tree-like column-supported cantilever roof structure according to claim 1, characterized in that: The cross support points are H-shaped or box-shaped steel beams, arranged between the roof cantilever beam grids and above the tree-like column trunks, forming a cross shape. A reinforcing web is provided at the intersection of the cross support points, and the reinforcing web is welded and fixed to the cross support points.

5. The self-stabilizing tree-like column-supported cantilever roof structure according to claim 1, characterized in that: The tree-shaped column trunk is a round steel pipe that grows from the ground foundation. An enlarged foundation is set at the bottom of the tree-shaped column trunk. The enlarged foundation is fixed to the ground foundation by reinforced concrete pouring. The top of the tree-shaped column trunk and the cross support point are detachably connected by a flange. An anti-slip pad is set between the flange and the cross support point.

6. The self-stabilizing tree-like column-supported cantilever roof structure according to claim 1, characterized in that: The tree-like branches are a number of circular steel pipes, evenly distributed and obliquely connected between the tree-like column trunk and the roof cantilever beam. The lower part of the tree-like branches is fixedly connected to the tree-like column trunk by welding, and the top is connected to the roof cantilever beam by a limiting connector. The limiting connector includes a U-shaped bracket and a fastening bolt. The U-shaped bracket is engaged with the roof cantilever beam, and the fastening bolt passes through the U-shaped bracket and is threaded to the top of the tree-like branches.

7. The self-stabilizing tree-like column-supported cantilever roof structure according to claim 6, characterized in that: The buffer assembly is located at the connection between the tree-like branches and the roof cantilever beam. The buffer assembly includes a rubber buffer pad and a spring. The rubber buffer pad is fitted between the top of the tree-like branches and the U-shaped bracket. The spring is sleeved on the outside of the fastening bolt, and its two ends abut against the U-shaped bracket and the top of the tree-like branches, respectively.

8. A construction method for a self-stabilizing tree-like column-supported cantilevered roof structure, characterized in that, Includes the following steps: Structural Zoning: Based on the structural form, span size, and load distribution, the area is divided into the roof support structure zone, the first cantilever span zone, the second cantilever span zone, the third cantilever span zone, and the transition zone. Foundation construction: Treat the ground foundation, pour the enlarged foundation and pre-embedded bolts, and cure to the design strength; Install tree-like column trunks and roof support structures; Install the tree-like branches on the side of the roof support structure; Install the longitudinal cantilever beam of the first cantilever span; Install the transverse cantilever beam of the first cantilever span; Install the first cantilevered cross-tree branch; Install the diagonal bracing of the first cantilever span cantilever beam; Install the second cantilever span longitudinal cantilever beam and cross support points; Install the second cantilever span transverse cantilever beam, tree-like branches, and cantilever beam diagonal bracing; Install the third cantilever span longitudinal cantilever beam, transverse cantilever beam, tree-like branches, and cantilever beam diagonal bracing; Overall inspection and reinforcement.

9. The construction method according to claim 8, characterized in that: First, install the roof support columns, fix the seismic pads at the column bases to the pre-embedded bolts, then install the roof steel beams and connect and fix them with high-strength bolts; when installing the tree-shaped column trunks, fix the bottom of the tree-shaped column trunks to the enlarged foundation and correct the verticality of the tree-shaped column trunks.

10. The construction method according to claim 8, characterized in that: When installing the cross support points, the reinforcing web at the intersection should be welded simultaneously; the inspection includes the connection strength of the components, the verticality of the structure, and the flatness, and the unqualified parts should be reinforced.

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