Modularized hoisting construction method of spatial curved-twisted grid structure

Abstract

The invention relates to the technical field of building construction, in particular to a modular hoisting construction method of a spatial curved-twisted grid structure. According to the technical scheme, the space bending and twisting grid structure mainly aims at the problem of hoisting of the bending and twisting grid structure, the space bending and twisting grid structure comprises longitudinal rods and transverse rods, the two longitudinal rods are oppositely distributed, the two longitudinal rods are each of a bending and twisting strip-shaped structure, and the transverse rods are fixed between the two longitudinal rods. During construction of the curved-twisted grid structure, the curved-twisted grid structure is based on a data link of the same BIM model from the processes of model processing, model assembly and model installation, cognitive errors and data transmission errors of workers are eliminated, key control points of the curved-twisted grid structure can be measured in real time, and the construction efficiency is improved. The closed-loop feedback of the data of the curved-twisted grid structure ensures that the overall structure of the curved-twisted grid structure is matched with the three-dimensional form of each module unit, thereby facilitating the smooth implementation of the subsequent curtain wall and decoration engineering.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a modular hoisting construction method for a spatial bending and twisting grid structure. Background Technology

[0002] Currently, the roof systems of large public buildings (such as stadiums, theaters, and airport terminals) are increasingly trending towards free-form curved and twisted grid structures in pursuit of unique architectural aesthetics. These structures are typically composed of twisted box-section members, which have complex shapes in three-dimensional space and lack regular standard segments, posing unprecedented challenges to construction.

[0003] Traditional construction methods mainly rely on the "in-situ bulk assembly method using full-span scaffolding platforms," ​​which has the following inherent drawbacks: 1. Huge amount of materials required: Large-scale full-span scaffolding needs to be erected as a construction platform and temporary support, resulting in an astonishing consumption of steel and high cost of the measures.

[0004] 2. High safety risks: A large number of welding and assembly operations are carried out at high altitudes, resulting in poor working conditions, numerous safety hazards, and great difficulty in quality control.

[0005] 3. Long construction period: The erection and dismantling of scaffolding and a large number of high-altitude bulk operations are extremely time-consuming, resulting in a long overall construction period.

[0006] 4. Difficulty in controlling installation accuracy: Bending and twisting structures are difficult to accurately represent on two-dimensional drawings. Construction workers rely on experience for understanding, which can easily lead to cognitive biases. Accumulated errors are unavoidable when measuring and positioning complex three-dimensional coordinates at high altitudes, making it difficult to guarantee the final building form and design intent. Figure 1 To.

[0007] 5. Low collaboration efficiency: Information transmission between design, processing and construction relies on two-dimensional drawings. For complex structures, the information chain is prone to breakage, leading to processing errors or on-site installation failures.

[0008] Therefore, there is an urgent need in this field for an innovative construction method that can fundamentally solve the above problems and achieve safe, accurate, efficient and economical construction. Summary of the Invention

[0009] The purpose of this invention is to solve the problems of huge material consumption, high safety risks, long construction period, difficulty in controlling installation accuracy and low collaborative efficiency when installing curved and twisted grid structures on roofs.

[0010] The technical solution of the present invention: a spatial bending and twisting grid structure, comprising: longitudinal bars and transverse bars, wherein there are two longitudinal bars distributed opposite each other, both of which are bending and twisting strip structures, and a transverse bar is fixed between the two longitudinal bars, the transverse bar also being a bending and twisting strip structure; The two adjacent crossbars and longitudinal bars form a grid-like structure. The crossbars are detached and installed on the longitudinal bars. Rivets are detached and installed on the crossbars, and the rivets pass through the crossbars and longitudinal bars for fixation.

[0011] Optionally, the longitudinal bar is provided with an installation groove, and the crossbar is engaged with the longitudinal bar through the installation groove. The inner wall of the installation groove is provided with a slot, and the rivet passes through the crossbar and is engaged in the slot of the inner wall of the installation groove.

[0012] Optionally, a frame is sleeved on the longitudinal rod, the frame having a U-shaped structure, and the inner wall of the frame abutting against the longitudinal rod.

[0013] Optionally, the inner wall of the frame is provided with support rods, which are strip-shaped structures and abut against the longitudinal rods.

[0014] Optionally, the frame is provided with a sliding groove, and one end of the support rod slides inside the sliding groove, wherein the sliding groove is a strip-shaped hole.

[0015] Optionally, mounting pins are inserted into the frame, the mounting pins slide on the slide groove, and the mounting pins pass through the slide groove and the support rod for fixation.

[0016] Optionally, the mounting pin is a bolt, the mounting pin is threadedly connected to the support rod, and the end of the mounting pin not connected to the support rod abuts against the frame.

[0017] A modular hoisting construction method for a spatial bending and twisting grid structure includes the following steps: S1. Install a temporary support frame, fix the support rod to the frame body, adjust the height of the support rod, and then place the frame body with the support rod installed in a suitable position. S2. By splicing the twisted grid structure, the longitudinal bar is placed stably on the support bar, and then the cross bar is snapped between two adjacent longitudinal bars. Then the rivets are connected to the cross bar and the longitudinal bar. S3. Install temporary support frame, input the spliced ​​curved grid structure model into the BIM system, lay out the spatial three-dimensional solid model, use measuring instruments to accurately measure the spatial coordinates of the positioning support points, then mark the projection coordinates of each positioning point on the ground with crosshairs, and move the position of the support rod and frame according to the projection coordinates. S4. Modular assembly hoisting: The center of gravity of the frame is found by computer three-dimensional solid layout. Then, lifting lugs are welded on the frame, steel wire ropes are connected to the lifting lugs, and the steel wire ropes are connected and fixed to the roof.

[0018] In summary, this application includes at least one of the following beneficial technical effects: 1. During the construction of the bent-twisted grid structure in this invention, the entire process from model processing, model assembly, and model installation is based on the same BIM model data chain. This eliminates cognitive errors and data transmission errors among workers, allows for real-time measurement of key control points of the bent-twisted grid structure, and enables closed-loop data feedback of the bent-twisted grid structure. This ensures that the overall structure of the bent-twisted grid structure matches the three-dimensional shape of each module unit, facilitating the smooth implementation of subsequent curtain wall and decoration projects.

[0019] 2. The modular operation implemented in this invention standardizes and streamlines the construction process of the bent-twisted grid structure. Different implementation procedures of the bent-twisted grid structure can be carried out in parallel, which greatly accelerates the construction progress of the bent-twisted grid structure, makes the construction period prediction more accurate, and makes it more controllable. Attached Figure Description

[0020] Figure 1 A construction diagram of the spatial bending and twisting grid structure provided by the present invention; Figure 2 A schematic diagram of the spatial bending and twisting grid structure provided by the present invention; Figure 3 This is a diagram showing the connection structure between the mounting groove and the longitudinal rod provided by the present invention. Figure 4 This is a diagram showing the connection structure of the crossbar and longitudinal bar provided by the present invention; Figure 5 This is a connection structure diagram of the support rod and frame provided by the present invention.

[0021] Figure label: 1. Horizontal bar; 2. Vertical bar; 21. Mounting groove; 3. Rivet; 4. Frame; 41. Support rod; 42. Slide groove; 43. Mounting nail. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0024] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Example 1

[0028] like Figures 1-3 The spatial twisted grid structure shown includes: vertical bars 2 and horizontal bars 1. There are two vertical bars 2 distributed opposite each other. Both vertical bars 2 are twisted strip structures. A horizontal bar 1 is fixed between the two vertical bars 2. The horizontal bar 1 is also a twisted strip structure. The two adjacent horizontal bars 1 and vertical bars 2 form a grid-like structure. The horizontal bar 1 is disassembled and installed on the vertical bar 2. The horizontal bar 1 is disassembled and installed with rivets 3. The rivets 3 pass through the horizontal bar 1 and the vertical bar 2 for fixation. To facilitate understanding of the composition of the spatial twisted grid structure, the spatial twisted grid structure shown in this invention mainly includes horizontal bars 1, vertical bars 2, and rivets 3. In actual production, both horizontal bars 1 and vertical bars 2 are arbitrary twisted bar structures. Each twisted grid structure has multiple horizontal bars 1 and vertical bars 2. When the horizontal bars 1 are installed on the vertical bars 2 by the rivets 3, the horizontal bars 1 can cooperate with the vertical bars 2 to form a spatial three-dimensional twisted grid structure. In order to improve the connection strength between the horizontal bars 1 and the vertical bars 2, some horizontal bars 1 on the twisted grid structure are also welded to the vertical bars 2.

[0029] The longitudinal bar 2 is provided with an installation groove 21. The crossbar 1 is connected to the longitudinal bar 2 through the installation groove 21. The inner wall of the installation groove 21 is provided with a slot. The rivet 3 passes through the crossbar 1 and is connected to the slot in the inner wall of the installation groove 21. The installation groove 21 is a groove structure reserved on the longitudinal bar 2. The shape of the installation groove 21 is set according to the shape of the installation part of the crossbar 1. In actual use, it can facilitate the splicing of the crossbar 1 and the longitudinal bar 2.

[0030] A frame 4 is sleeved on the longitudinal rod 2. The frame 4 has a U-shaped structure, and the inner wall of the frame 4 abuts against the longitudinal rod 2.

[0031] The inner wall of the frame 4 is provided with a support rod 41, which is a strip structure and abuts against the longitudinal rod 2.

[0032] The frame 4 has a sliding groove 42, and one end of the support rod 41 slides inside the sliding groove 42. The sliding groove 42 is a strip-shaped hole.

[0033] Mounting nails 43 are inserted into the frame 4. Mounting nails 43 slide on the slide groove 42 and are fixed through the slide groove 42 and the support rod 41.

[0034] Mounting nail 43 is a bolt. Mounting nail 43 and support rod 41 are threaded together. The end of mounting nail 43 that is not connected to support rod 41 abuts against frame 4.

[0035] BIM generally refers to Building Information Modeling. The core of BIM is to create a virtual three-dimensional model of a building project and use digital technology to provide this model with a complete and modular building project information database that is consistent with the actual situation. Currently, steel structure drawing software based on BIM technology is usually Teklastructure. The frame 4, support rod 41 and mounting nail 43 shown in this invention can form a temporary support frame required for splicing the bent-twisted grid structure. The support frame can be welded and fixed at each point according to actual use requirements. Before the actual splicing of the bent-twisted grid structure, the bent-twisted grid structure model is pre-drawn in the Teklastructure software inside the computer system. Then, based on the model information drawn, measuring instruments are used to precisely measure the spatial coordinates of the positioning support points. Then, the projected coordinates of each positioning point are marked on the ground with crosshairs. The positions of the support rod 41 and the frame 4 are moved according to the projected coordinates. When installing temporary support frames, it is necessary to ensure that the center of the bottom surface of the support frame coincides with the center of the cross line on the ground. A 600-800mm fine adjustment device is installed at the top of the support frame. The total height of the support frame is the difference between the spatial height of the support point of the hoisting unit and the ground elevation. In order to ensure the lateral stability of the support frame, in addition to welding and fixing the support frame column base to the embedded parts, guy ropes need to be installed on all four sides of each support frame on site. Then, the staff used computer-generated 3D solid modeling to find the center of gravity of the support frame for hoisting. During the hoisting process, the length and angle of the wire rope hoisting need to be considered to reasonably arrange the hoisting points. According to the hoisting situation, lifting lugs are welded on the support frame, and wire ropes are tied to the lifting lugs. It should be noted that the bent and twisted grid structure needs to be re-measured and positioned using measuring instruments during hoisting, and corresponding measures are taken to fix the bent and twisted grid structure. After the measuring instrument re-measures and positions the hoisting location of the bent-twisted grid structure, the staff sets up an operating platform on the roof or other installation location, and the staff can use the operating platform to hoist the bent-twisted grid structure. Example 2 A modular hoisting construction method for a spatial bending and twisting grid structure includes the following steps: S1. Install a temporary support frame, fix the support rod 41 to the frame 4, adjust the working height of the support rod 41, and then place the frame 4 with the support rod 41 installed in a suitable position. S2. By splicing the twisted grid structure, the longitudinal bar 2 is placed stably on the support bar 41. Then, the cross bar 1 is snapped between two adjacent longitudinal bars 2. Finally, the rivet 3 is connected to the cross bar 1 and the longitudinal bar 2. S3. Install temporary support frame, input the spliced ​​bending and twisting grid structure model into the BIM system, lay out the spatial three-dimensional solid model, use measuring instruments to accurately measure the spatial coordinates of the positioning support points, then mark the projection coordinates of each positioning point on the ground with crosshairs, and move the position of the support rod 41 and frame 4 according to the projection coordinates. S4. Modular combination hoisting: The center of gravity of frame 4 is found by computer three-dimensional solid layout. Then, lifting lugs are welded on frame 4, steel wire ropes are connected to the lifting lugs, and the steel wire ropes are connected and fixed to the roof.

[0036] The above specific embodiments are merely optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A spatial bending and twisting grid structure, characterized in that, include: There are two longitudinal bars (2) and two transverse bars (1). The two longitudinal bars (2) are both twisted strip structures. A transverse bar (1) is fixed between the two longitudinal bars (2). The transverse bar (1) is also a twisted strip structure. The two adjacent crossbars (1) and vertical bars (2) form a grid-like structure. The crossbars (1) are disassembled and installed on the vertical bars (2). Rivets (3) are disassembled and installed on the crossbars (1). The rivets (3) pass through the crossbars (1) and vertical bars (2) for fixation.

2. The spatial bending and twisting grid structure according to claim 1, characterized in that, The longitudinal bar (2) is provided with an installation groove (21), and the cross bar (1) is engaged with the longitudinal bar (2) through the installation groove (21). The inner wall of the installation groove (21) is provided with a slot, and the rivet (3) passes through the cross bar (1) and is engaged in the slot of the inner wall of the installation groove (21).

3. The spatial bending and twisting grid structure according to claim 2, characterized in that, A frame (4) is sleeved on the longitudinal rod (2). The frame (4) has a U-shaped structure, and the inner wall of the frame (4) abuts against the longitudinal rod (2).

4. The spatial bending and twisting grid structure according to claim 3, characterized in that, The inner wall of the frame (4) is provided with a support rod (41), which is a strip structure and abuts against the longitudinal rod (2).

5. A spatial bending and twisting grid structure according to claim 4, characterized in that, The frame (4) has a sliding groove (42) and one end of the support rod (41) slides inside the sliding groove (42). The sliding groove (42) is a strip-shaped hole.

6. A spatial bending and twisting grid structure according to claim 5, characterized in that, The frame (4) is fitted with mounting nails (43), which slide on the slide groove (42) and are fixed through the slide groove (42) and the support rod (41).

7. A spatial bending and twisting grid structure according to claim 6, characterized in that, The mounting pin (43) is a bolt, and the mounting pin (43) is threadedly connected to the support rod (41). The end of the mounting pin (43) that is not connected to the support rod (41) abuts against the frame (4).

8. A modular hoisting construction method for a spatial tortuous grid structure, applicable to the spatial tortuous grid structure described in claim 7, characterized in that, Includes the following steps: S1. Install a temporary support frame, fix the support rod (41) on the frame (4), adjust the height of the support rod (41) at the same time, and then place the frame (4) with the support rod (41) installed in a suitable position. S2. Splice the twisted grid structure, place the longitudinal bar (2) stably on the support bar (41), then snap the cross bar (1) between two adjacent longitudinal bars (2), and then connect the rivet (3) to the cross bar (1) and the longitudinal bar (2). S3. Install temporary support frame, input the spliced ​​bent grid structure model into the BIM system, lay out the spatial three-dimensional solid model, use measuring instruments to accurately measure the spatial coordinates of the positioning support points, then mark the projection coordinates of each positioning point on the ground with cross lines, and move the position of the support rod (41) and frame (4) according to the projection coordinates. S4. Modular combination hoisting: The center of gravity of the frame (4) is found by computer three-dimensional solid layout. Then, the lifting lugs are welded on the frame (4), and steel wire ropes are connected to the lifting lugs to connect and fix the steel wire ropes to the roof.

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