Construction method of large-span single-layer net shell steel structure roof

Abstract

The present application relates to a kind of construction methods of large-span single-layer net shell steel structure roof, comprising the following steps: construction building lateral structure;Multiple lattice columns are set in the construction area surrounded by lateral structure, and horizontal support is set between lattice column, forming temporary support system;First annular member is assembled into first ring and second ring on temporary support system;Inter-ring radial structure is assembled into first radial member between first ring and second ring;Ring side connecting structure is assembled into first X-shaped member between lateral structure and second ring;Steel pull rod is set between lateral structure and second ring, and the construction of single-layer net shell steel structure roof is completed;Temporary support system is removed.The present application forms stable temporary support system by lattice column and horizontal support, can construct first ring and second ring on temporary support system, guarantees construction safety, and lattice column and horizontal support set can be recycled after removal, reduces construction difficulty and cost.

Description

Technical Field

[0001] This invention relates to the field of steel structure design, and specifically to a construction method for a large-span single-layer reticulated shell steel structure roof. Background Technology

[0002] In the construction of large-span single-layer reticulated steel structures, traditional techniques generally suffer from the following problems: The lack of support at the lower part of the structure leads to poor installation stability, requiring the deployment of large-area full-span scaffolding, consuming large amounts of steel, resulting in high construction costs and long erection periods; temporary supports often use embedded parts for fixing, which cannot be recycled after being fixed to the concrete structure, leading to resource waste, and the high precision requirements for embedded parts require secondary processing if there are positional deviations, increasing the construction period and cost; hoisting schemes rely on experience-based design and lack accurate mechanical simulation, easily leading to excessive structural deformation or unreasonable machinery selection; and the construction process is disorganized, resulting in low efficiency of high-altitude operations and extended construction periods. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a construction method for a large-span single-layer reticulated steel structure roof, which solves the problems of low construction efficiency, serious material waste, and low construction quality of existing temporary support schemes.

[0004] The technical solution to achieve the above objectives is: a construction method for a large-span single-layer reticulated shell steel structure roof, comprising the following steps: constructing the lateral structure of the building; setting multiple lattice columns at intervals within the construction area enclosed by the lateral structure, and setting horizontal support members between the multiple lattice columns to connect and form a temporary support system; providing a first circumferential member, and assembling a first ring and a second ring above the temporary support system using the first circumferential member; providing a first radial member, and assembling an inter-ring radial structure between the first ring and the second ring using the first radial member; providing a first X-shaped member, and assembling a ring-side connection structure between the lateral structure and the second ring using the first X-shaped member; setting steel tie rods between the lateral structure and the second ring to complete the construction of the single-layer reticulated shell steel structure roof; and dismantling the temporary support system.

[0005] In the construction method of a large-span single-layer reticulated steel structure roof of the present invention, a stable temporary support system is formed by lattice columns and horizontal support members. The first ring and the second ring can be constructed on the temporary support system, which ensures construction safety. The lattice columns and horizontal support members can be reused for construction after being removed, which reduces construction difficulty and cost and improves construction efficiency.

[0006] A further improvement of the construction method for a large-span single-layer reticulated steel structure roof of the present invention is that the step of setting multiple lattice columns at intervals within the construction area enclosed by the lateral structure and setting horizontal support members between the multiple lattice columns to form a temporary support system includes: setting multiple bases on the bottom plate within the construction area enclosed by the lateral structure; and constructing the lattice columns from bottom to top according to the bases.

[0007] A further improvement of the construction method for a large-span single-layer reticulated steel structure roof of the present invention is that, in the construction area enclosed by the lateral structure, multiple lattice columns are spaced apart, and horizontal support members are set between the multiple lattice columns to form a temporary support system, the method further includes: setting a horizontal bracket between the two beams of the lateral structure, and constructing the lattice columns on the horizontal bracket.

[0008] A further improvement of the construction method for a large-span single-layer reticulated steel structure roof of the present invention is that, in the construction area enclosed by the lateral structure, multiple lattice columns are spaced apart, and horizontal support members are set between the multiple lattice columns to form a temporary support system, which further includes: setting guy ropes on the lattice columns.

[0009] A further improvement of the construction method for a large-span single-layer reticulated steel structure roof of the present invention is that, in the construction area enclosed by the lateral structure, multiple lattice columns are spaced apart, and horizontal support members are set between the multiple lattice columns to form a temporary support system, the method further includes: setting horizontal support members between two adjacent lattice columns, and using the horizontal support members as operating passages for construction personnel.

[0010] A further improvement of the construction method for a large-span single-layer reticulated steel structure roof of the present invention is that the provision of a first circumferential member, and the assembly of a first ring and a second ring above the temporary support system using the first circumferential member, includes: setting a lifting lug on the first circumferential member, and hoisting the first circumferential member through the lifting lug.

[0011] A further improvement of the construction method of a large-span single-layer reticulated steel structure roof of the present invention is that the provision of a first radial component, and the assembly of an inter-ring radial structure between the first ring body and the second ring body using the first radial component, includes: synchronously installing the first radial components on both sides with the cross-shaped central axis of the single-layer reticulated steel structure roof as a symmetrical reference.

[0012] A further improvement of the construction method for a large-span single-layer reticulated steel structure roof of the present invention is that, before the construction of the single-layer reticulated steel structure roof is completed by setting a steel tie rod between the lateral structure and the second ring body, a second circumferential member is set between the first ring body and the second ring body, and assembled to form a third ring body.

[0013] A further improvement of the construction method for a large-span single-layer reticulated steel structure roof of the present invention is that, before the construction of the single-layer reticulated steel structure roof is completed, a steel tie rod is installed between the lateral structure and the second ring body, and a second X-shaped component is installed between the first radial components.

[0014] A further improvement of the construction method for a large-span single-layer reticulated shell steel structure roof of the present invention is that the dismantling of the temporary support system includes: arranging sensor modules on the single-layer reticulated shell steel structure roof, and monitoring the stress, temperature and vibration on the single-layer reticulated shell steel structure roof during the dismantling process through the sensor modules. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the construction method of a large-span single-layer reticulated steel structure roof according to the present invention.

[0016] Figure 2 This is a schematic diagram of a large-span single-layer reticulated shell steel structure roof according to the present invention.

[0017] Figure 3 This is a flowchart illustrating step S120 of the present invention.

[0018] Figure 4 This is a schematic diagram of the base and lattice column of the present invention.

[0019] Figure 5 This is another schematic diagram of step S120 of the present invention.

[0020] Figure 6 This is a schematic diagram of the structure of the horizontal support of the present invention.

[0021] Figure 7 This is another schematic diagram of step S120 of the present invention.

[0022] Figure 8 This is a schematic diagram of the structure of the guy rope of the present invention.

[0023] Figure 9 This is another schematic diagram of step S120 of the present invention.

[0024] Figure 10 This is a schematic diagram of the structure of the horizontal support component of the present invention.

[0025] Figure 11 This is a flowchart illustrating step S130 of the present invention.

[0026] Figure 12 This is a flowchart illustrating step S140 of the present invention.

[0027] Figure 13This is a flowchart illustrating the process before step S160 of the present invention.

[0028] Figure 14 This is another flowchart before step S160 of the present invention.

[0029] Figure 15 This is a flowchart illustrating step S170 of the present invention.

[0030] In the diagram: 10. Lattice column; 11. Horizontal support; 12. Base; 13. Horizontal bracket; 14. Guy rope; 20. First ring; 21. Second ring; 22. Inter-ring radial structure; 23. Ring side connection structure; 24. Third ring; 25. Second X-shaped component; 30. Lateral structure. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] See Figure 1 and Figure 2 , Figure 1 The diagram shows a construction method for a large-span single-layer reticulated shell steel structure roof according to the present invention. Figure 2 This diagram illustrates a structural schematic of a large-span single-layer reticulated shell steel structure roof according to the present invention. The present invention provides a construction method for a large-span single-layer reticulated shell steel structure roof, comprising the following steps: Execution step S110: Construct the lateral structure 30 of the building.

[0033] The lateral structure 30 of the building includes a side wall structure and a connector installed at the top of the side wall. Then, step S120 is performed.

[0034] Step S120: Multiple lattice columns 10 are set at intervals within the construction area enclosed by the lateral structure 30, and horizontal support members 11 are set between the multiple lattice columns 10 to form a temporary support system.

[0035] The lattice column consists of four steel pipes as main members and angle steel as tie bars. The horizontal support member 11 is a steel section, forming a longitudinal and transverse horizontal support system with the lattice column 10. The dimensions of the lattice column 10 and the horizontal support member 11 are set according to actual construction requirements and are not specifically limited here. Next, step S130 is executed.

[0036] Step S130: Provide a first circumferential component, and assemble a first ring body 20 and a second ring body 21 on top of the temporary support system using the first circumferential component.

[0037] The dimensions of the first circumferential component are set according to actual construction requirements and are not specifically limited here. The first ring body 20 and the second ring body 21 are set as concentric circles. The diameter of the first ring body 20 is set smaller than the diameter of the second ring body 21. The center position of the first ring body 20 and the second ring body 21 is the highest point of the roof. The first ring body 20 is set close to the center. Then, step S140 is executed.

[0038] Execution step S140: Provide a first radial component, and assemble the first radial component between the first ring body 20 and the second ring body 21 to form an inter-ring radial structure 22.

[0039] The first radial component is installed symmetrically to maintain structural stability. Then, step S150 is executed.

[0040] Execution step S150: Provide a first X-shaped component, and assemble the first X-shaped component into a ring-side connection structure 23 between the lateral structure 30 and the second ring body 21.

[0041] The second ring 21 is positioned close to the lateral structure 30. The ring-side connecting structure 23 connects the second ring 21 to the lateral structure 30, transferring the load force of the first ring 20, the second ring 21, and the inter-ring radial structure 22 to the lateral structure 30, forming a stable force transmission structure. Then, step S160 is executed.

[0042] Step S160: Install steel tie rods between the lateral structure 30 and the second ring 21 to complete the construction of the single-layer reticulated steel structure roof.

[0043] Among them, the steel tie rod forms a lower chord support system below the second ring body 21, which can better maintain the stability of the connection between the second ring body 21 and the lateral structure 30. Then, step S170 is executed.

[0044] Step S170: Remove the temporary support system.

[0045] The dismantling sequence is the reverse of the installation sequence; the horizontal connectors are dismantled first, followed by the lattice column 10.

[0046] In this embodiment, before construction, the components of the single-layer reticulated shell steel structure roof need to be segmented according to the construction drawings for convenient on-site hoisting. Based on the three-dimensional coordinates of the segmentation points and the actual hoisting points, the planar position and elevation of the lattice column 10 in the temporary support system are set. After the lattice column 10 is installed, it is necessary to verify whether the elevation of the top fixture of the lattice column 10 meets the design and specification requirements.

[0047] See Figure 3 and Figure 4 , Figure 3A flowchart of step S120 of the present invention is shown. Figure 4 A structural schematic diagram of the base and lattice columns of the present invention is shown. The present invention provides a construction method for a large-span single-layer reticulated shell steel structure roof, step S120 including: Step S121: Install multiple bases 12 on the bottom plate within the construction area enclosed by the lateral structure 30.

[0048] The position of the base 12 corresponds to the preset position of the lattice column 10. Then, step S122 is executed.

[0049] Execution step S122: Based on the base 12, construct the lattice column 10 from bottom to top.

[0050] The lattice column 10 is constructed on the base 12, and the base 12 and the lattice column 10 are welded and fixed together. The base 12 and the lattice column 10 can be reused after dismantling, reducing construction costs.

[0051] See Figure 5 and Figure 6 , Figure 5 Another flowchart of step S120 of the present invention is shown. Figure 6 A schematic diagram of the horizontal support structure of the present invention is shown. The present invention provides a construction method for a large-span single-layer reticulated shell steel structure roof, wherein step S120 further includes: Step S123: Set up a horizontal support 13 between the two beams of the lateral structure 30, and construct the lattice column 10 on the horizontal support 13.

[0052] When the concrete structure beneath the pre-set base 12 is not strong enough to meet the installation requirements, the lattice column 10 is supported by a horizontal bracket 13, resting on concrete beams and columns of sufficient strength on both sides. The horizontal bracket 13 supports the bottom of the lattice column 10, ensuring its stability.

[0053] In this embodiment, the horizontal support 13 is made of H-beams, and angle steel is provided on the upper and lower flanges at the connection nodes of the H-beams to form a stable support.

[0054] In this embodiment, before construction, it is necessary to simulate and calculate the stress on the lattice column 10 and its lower base 12 according to the drawing requirements and site location, and determine the specifications of the supporting components and concrete beams and columns to be selected. Based on the calculation results, the lattice column 10 is optimized and adjusted in advance, and the lattice column 10, the top tooling of the lattice column 10, and the horizontal support components 11 between the lattice columns 10 are constructed after optimization and adjustment.

[0055] See Figure 7 and Figure 8 , Figure 7Another flowchart of step S120 of the present invention is shown. Figure 8 A schematic diagram of the guy rope of the present invention is shown. The present invention provides a construction method for a large-span single-layer reticulated shell steel structure roof, wherein step S120 further includes: Step S124: Install guy ropes 14 on the lattice column 10.

[0056] Considering the height of the lattice column 10 and the high frequency of strong winds in the construction area, the installation of guy ropes 14 can further enhance the strength and lateral stability of the temporary support system. After the lattice column 10 is installed, four guy ropes 14 connected to the top of the lattice column 10 are strung to prevent the lattice column 10 from overturning on one side.

[0057] In this embodiment, the size and quantity of guy ropes 14 can be set according to actual construction needs, and no specific restrictions are imposed here.

[0058] See Figure 9 and Figure 10 , Figure 9 Another flowchart of step S120 of the present invention is shown. Figure 10 A structural schematic diagram of the horizontal support member of the present invention is shown. The present invention provides a construction method for a large-span single-layer reticulated shell steel structure roof, wherein step S120 further includes: Step S125: Install horizontal support members 11 between two adjacent lattice columns 10, and use the horizontal support members 11 as a passage for construction personnel to operate.

[0059] In this system, two H-beams are assembled into a horizontal support 13 between two adjacent lattice columns 10 to serve as an access path for construction workers. This eliminates the need for additional temporary access, reducing construction costs and improving efficiency.

[0060] See Figure 11 The diagram shows a flowchart of step S130 of the present invention. The present invention provides a construction method for a large-span single-layer reticulated shell steel structure roof, wherein step S130 includes: Execution step S131: Install lifting lugs on the first circumferential component and lift the first circumferential component using the lifting lugs.

[0061] The lifting lugs are located at four equal points on the first circumferential member. Using steel wire ropes threaded through the lifting lugs, two cranes can simultaneously lift and place the structure onto the lattice column 10 for assembly, ensuring good lifting stability.

[0062] In this embodiment, a combination of the Midas model and the Tekla model is used before hoisting to calculate the stability of the structure during installation, calculating stress, strain, and deformation during hoisting to ensure the safety of hoisting and the rationality of the construction process. See Figure 12 The diagram shows a flowchart of step S140 of the present invention. The present invention provides a construction method for a large-span single-layer reticulated shell steel structure roof, wherein step S140 includes: Execution step S141: Using the cross-shaped central axis of the single-layer reticulated steel structure roof as a symmetrical reference, simultaneously install the first radial components on both sides.

[0063] The symmetrical installation of the first radial component can prevent structural imbalance on one side.

[0064] See Figure 13 This diagram illustrates the process before step S160 of the present invention. The present invention provides a construction method for a large-span single-layer reticulated shell steel structure roof, the process before step S160 including: Step S1601: A second circumferential component is set between the first ring body 20 and the second ring body 21, and assembled to form the third ring body 24.

[0065] The third ring 24 is a concentric circle with the first ring 20 and the second ring 21. The third ring 24 is located between the first ring 20 and the second ring 21. The diameter of the third ring 24 is larger than the diameter of the first ring 20 and smaller than the diameter of the second ring 21.

[0066] In this embodiment, a fourth ring and a fifth ring are provided between the first ring 20 and the second ring 21. In other embodiments, the number and size of the rings are set according to actual construction needs and are not specifically limited here.

[0067] See Figure 14 This diagram illustrates another process flow before step S160 of the present invention. The present invention provides a construction method for a large-span single-layer reticulated shell steel structure roof, which further includes the following steps before step S160: Step S1602: Install a second X-shaped member 25 between the first radial members.

[0068] Among them, considering the overall load capacity, the second X-shaped component 25 is set at.

[0069] See Figure 15 The diagram shows a flowchart of step S170 of the present invention. The present invention provides a construction method for a large-span single-layer reticulated shell steel structure roof, wherein step S170 includes: Step S171: Install sensor modules on the single-layer reticulated steel structure roof. During the dismantling process, monitor the stress, temperature, and vibration of the single-layer reticulated steel structure roof using the sensor modules.

[0070] The dismantling process employed a step-by-step, equidistant unloading method combined with multi-parameter monitoring. The unloading process used a step-by-step, equidistant unloading method of "5mm / step initially, 10-20mm / step later," with all jacks operating synchronously to avoid sudden changes in internal forces. Monitoring points were set up on the single-layer reticulated steel structure roof, with displacement monitoring points every 5m, stress-strain points at key welds, and temperature monitoring points (increased when the ambient temperature was ±5℃). Vibration monitoring points were also set up in the hoisting operation area. Monitoring data was compared with simulated data in real time, and the unloading speed was adjusted when the deviation exceeded 5%.

[0071] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A construction method of a large-span single-layer reticulated shell steel structure roof, characterized in that, Includes the following steps: Construction of the building's lateral structure; Multiple lattice columns are spaced apart within the construction area enclosed by the lateral structure, and horizontal support members are installed between the multiple lattice columns to form a temporary support system. A first circumferential member is provided, and a first ring and a second ring are assembled on top of the temporary support system using the first circumferential member; A first radial member is provided, and an inter-ring radial structure is assembled between the first ring body and the second ring body using the first radial member; A first X-shaped component is provided, and a ring-side connection structure is assembled between the lateral structure and the second ring body using the first X-shaped component; A steel tie rod is installed between the lateral structure and the second ring body to complete the construction of the single-layer reticulated steel structure roof; The temporary support system was dismantled.

2. The construction method for a large-span single-layer reticulated shell steel structure roof according to claim 1, characterized in that, The provision of multiple lattice columns spaced apart within the construction area enclosed by the lateral structure, and the installation of horizontal supports between the multiple lattice columns to form a temporary support system, includes: Multiple bases are installed on the bottom plate within the construction area enclosed by the lateral structure; Based on the base, the lattice columns are constructed from bottom to top.

3. The construction method for a large-span single-layer reticulated shell steel structure roof according to claim 1, characterized in that, The provision of setting up multiple lattice columns at intervals within the construction area enclosed by the lateral structure, and installing horizontal supports between the multiple lattice columns to form a temporary support system further includes: A horizontal support is installed between the two beams of the lateral structure, and the lattice column is constructed on the horizontal support.

4. The construction method for a large-span single-layer reticulated shell steel structure roof according to claim 1, characterized in that, The provision of setting up multiple lattice columns at intervals within the construction area enclosed by the lateral structure, and installing horizontal supports between the multiple lattice columns to form a temporary support system further includes: Guy ropes are installed on the lattice column.

5. The construction method for a large-span single-layer reticulated shell steel structure roof according to claim 1, characterized in that, The provision of setting up multiple lattice columns at intervals within the construction area enclosed by the lateral structure, and installing horizontal supports between the multiple lattice columns to form a temporary support system further includes: Horizontal supports are installed between each pair of adjacent lattice columns, and these horizontal supports serve as access channels for construction workers.

6. The construction method for a large-span single-layer reticulated shell steel structure roof according to claim 1, characterized in that, Providing a first circumferential member, and assembling a first ring and a second ring above the temporary support system using the first circumferential member, includes: A lifting lug is provided on the first circumferential component, and the first circumferential component is hoisted by the lifting lug.

7. The construction method for a large-span single-layer reticulated shell steel structure roof according to claim 1, characterized in that, The provision of a first radial member, and the assembly of an inter-ring radial structure between the first ring body and the second ring body using the first radial member, includes: Using the cross-shaped central axis of the single-layer reticulated steel structure roof as a symmetrical reference, the first radial components on both sides are installed simultaneously.

8. The construction method for a large-span single-layer reticulated shell steel structure roof according to claim 1, characterized in that, The step of installing steel tie rods between the lateral structure and the second ring body before completing the construction of the single-layer reticulated steel structure roof includes: A second circumferential component is provided between the first ring body and the second ring body, and the three ring bodies are assembled to form a third ring body.

9. The construction method for a large-span single-layer reticulated shell steel structure roof according to claim 1, characterized in that, The step of installing steel tie rods between the lateral structure and the second ring body, before completing the construction of the single-layer reticulated steel structure roof, also includes: A second X-shaped member is disposed between the first radial members.

10. The construction method for a large-span single-layer reticulated shell steel structure roof according to claim 1, characterized in that, The dismantling of the temporary support system includes: Sensor modules are installed on the single-layer reticulated steel structure roof to monitor stress, temperature, and vibration on the roof during dismantling.

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