A method for installing a large-angle end screen with a cantilever structure on top

Abstract

The invention discloses an installation method for a large-angle end screen with a cantilever structure on the top, which comprises: using BIM modeling to simulate the installation process of the large-angle end screen, and determining the arrangement position of the electric hoist and the position of the steel frame lifting point; prefabricating a single steel truss and multiple steel trusses constituting the steel frame, and transporting them to the construction site; performing secondary assembly at the construction site; arranging the electric hoist hanging point on the inner ring beam of the steel structure of the stadium main canopy; using a truck crane to hoist the steel frame to a preset height, and hanging a hook under the electric hoist on the lifting point of the steel frame; after the electric hoist is tested and qualified, using the electric hoist to lift the steel frame, and then performing the hook removal operation of the truck crane; the truck crane retracts the rod and leaves, and using the electric hoist to vertically lift the steel frame; horizontally arranging the electric hoist and adjusting the angle of the steel frame; after the angle of the steel frame is adjusted, re-measuring the position and posture of the steel frame, welding and connecting the hoist rod, and fixing the steel frame; hoisting the blocks corresponding to the end screen and installing them on the steel frame.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction engineering, and relates to an installation method for a large-inclination end screen with a cantilever structure above it. Background Art

[0002] With the development of technical means, in the construction of stadiums, the application of large-size end screens is becoming more and more common. The common installation methods are mostly vertical installation, vertical hanging or bracket support, that is, construction is carried out by using machinery such as cranes or tower cranes.

[0003] However, in some stadium roofs with an open structure in the middle, the inner side of the roof is an inverted triangular truss structure system, and there are cantilever steel beams inside the truss. During the process of fixing the end screen of the stadium to the truss chord, the main steel structure members will restrict the use of conventional lifting equipment. If the traditional end screen construction and installation process is still used, it will not be able to achieve the effect of being coordinated and integrated with the building structure.

[0004] Therefore, it is urgent to design an installation method for a large-inclination end screen with a cantilever structure above it to solve the technical problems existing in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to solve at least to a certain extent some of the technical problems existing in the prior art, and provide an installation method for a large-inclination end screen with a cantilever structure above it. Its structure is reasonable, which solves the installation method of the end screen in such large stadiums, fully reduces the occupation of the lower working surface, and ensures the efficiency of the installation operation.

[0006] To solve the above technical problems, the present invention provides an installation method for a large-inclination end screen with a cantilever structure above it, which includes:

[0007] S1, using BIM modeling to simulate the installation process of the large-inclination end screen, and determining the arrangement position of the electric hoist and the position of the steel frame lifting point;

[0008] S2, prefabricating single-piece steel trusses and multi-piece steel trusses that make up the steel frame, and transporting them to the construction site;

[0009] S3, performing secondary assembly at the construction site to form longitudinal main keels and transverse trusses, and connecting truss connection members;

[0010] S4, arranging electric hoist hanging points on the inner ring beam of the steel structure of the stadium main canopy;

[0011] S5, using a truck crane to hoist the steel frame to the preset height, and tying the hook under the electric hoist to the lifting point of the steel frame;

[0012] S6, after the electric hoist is qualified in the trial lifting, the steel frame is lifted by the electric hoist to loosen the hook of the truck crane, and then the hook is removed from the truck crane; the truck crane is retracted and the steel frame is lifted vertically by the electric hoist;

[0013] S7, horizontally arrange the electric hoist to adjust the angle of the steel frame;

[0014] S8, after adjusting the angle of the steel frame, re-measure the position and posture of the steel frame, weld the connecting rods, and fix the steel frame;

[0015] S9, hoist the corresponding blocks of the end screen and install them on the steel frame.

[0016] Further, in step S3, a flat processing site is reserved at the construction site, square steel and pads are used to form a support, and the square steel pipe installation drawing dimensions are arranged to form a longitudinal main keel; the upper plane of the longitudinal main keel is adjusted to the same elevation plane through level calibration.

[0017] In some embodiments, according to the dimensions on the drawing, the transverse trusses are assembled onto the longitudinal main keel from the middle to both sides in sequence.

[0018] Further, in step S4, four points suitable for hoisting are found on the inner ring beam of the steel structure of the stadium main canopy using a total station, which are used as four hanging points for hanging electric hoists for steel truss hoisting.

[0019] In some embodiments, a custom steel wire rope sleeve is hung on the corresponding hanging points on the inner ring beam of the steel structure of the main canopy of the stadium, and rubber is used to protect the steel components at the hanging points.

[0020] Further, in step S5, the steel frame is transported to the lifting position by a truck crane and then lifted to a preset height; the hook below the electric hoist is connected to the wire rope sleeve at the frame lifting point; when the frame is at a certain distance from the ground, the staff performs the hook operation; after the frame is lifted, the staff is sent to the frame by a boom truck to perform the hook operation.

[0021] Further, in step S6, the electric hoist is operated for trial lifting. After confirming that the operation is normal and qualified, the electric hoist is operated to lift the steel frame to an appropriate distance, so that the crane hook is released, and then the truck crane unhooks the hook; the truck crane retracts the pole and leaves, the staff withdraws from the steel frame, and the electric hoist is operated for vertical lifting; after the steel truss is lifted to the installation height, the articulated arm truck is used again to transport the staff to the steel frame.

[0022] Furthermore, in step S7, two electric hoists are arranged horizontally, one end of which is connected to the main steel structure rod, and the other end is tied with a large rope, which is delivered to the personnel who have climbed up to the steel truss at the height of the horseway, and the electric hoist at this end is hooked on the bottom square tube at the rear of the steel frame; the lower part of the steel frame is pulled by the horizontal electric hoist to adjust the angle of the steel frame, and the steel frame is controlled to be adjusted to the designed angle; the electric hoist is always kept in a stressed state until all the connecting rods at the reserved connection points with the main steel structure are welded, and then the horizontal electric hoist is slowly released.

[0023] Further, in step S8, after the steel frame angle is adjusted, the steel frame elevation and inclination are re-measured; after the re-measurement is qualified, the connecting rod is fixed and fixed to the inner ring truss; the support hanger part is measured and laid out on-site using PVC pipes of the same diameter, and the connecting rod is processed and welded to the reserved connection points of the main steel structure and the steel frame.

[0024] In some embodiments, after the welding of the connecting rod is completed, the electric hoist is gradually unloaded until all the hanging ropes are completely relaxed, at which time the hoist can be removed.

[0025] Beneficial effects of the present invention:

[0026] The present invention provides a method for installing a large-angle end screen with a cantilever structure on the top. The structure is reasonable, which solves the installation method of the end screen in such a large stadium, fully reduces the occupation of the working surface below, and ensures the efficiency of the installation operation. Brief Description of the Figures

[0027] The above advantages of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings, which are only schematic and do not limit the present invention, among which:

[0028] Figure 1 It is a structural schematic diagram of a method for installing a large-angle end screen with a cantilever structure on top according to the present invention;

[0029] Figure 2 is a schematic diagram of the steel frame of the present invention being connected to a stadium;

[0030] Figure 3 This is a schematic diagram of the corresponding arrangement points of the electric hoist described in the present invention. Specific implementation method

[0031] Figures 1 to 3 This is a schematic diagram of a method for installing a large-angle end screen with a cantilever structure on top described in the present application. The present invention is described in detail below in conjunction with specific embodiments and drawings.

[0032] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention. They are all explanatory and exemplary and should not be interpreted as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0033] The drawings in this specification are schematic diagrams to assist in explaining the concept of the present invention and schematically represent the shapes of the various parts and their relationships. Please note that in order to clearly show the structures of the various components of the embodiments of the present invention, the drawings are not drawn to the same scale. The same reference numerals are used to represent the same parts.

[0034] A flow chart of a method for installing a large-angle end screen with a cantilever structure on top of the present invention, as shown in Figure 1 As shown below. Figure 2 and Figure 3 , explain the installation method of the large-angle end screen with a cantilever structure above, which includes:

[0035] S1, use BIM modeling to simulate the installation process of the large-angle end screen, determine the layout of the electric hoist and the location of the steel frame 10 lifting points;

[0036] S2, prefabricate a single steel truss and multiple steel trusses constituting the steel frame 10, and transport them to the construction site;

[0037] S3, secondary assembly is carried out at the construction site to form the longitudinal main keel and transverse trusses, and connect the truss connecting components;

[0038] S4, arrange electric hoist hanging point 50 on the inner ring beam of the stadium main canopy steel structure, such as Figure 3 As shown;

[0039] S5, using a truck crane to hoist the steel frame 10 to a preset height, and hanging the hook under the electric hoist on the lifting point of the steel frame;

[0040] S6, after the electric hoist is qualified in the trial lifting, the steel frame 10 is lifted by the electric hoist to loosen the hook of the truck crane, and then the hook removal operation of the truck crane is carried out; the truck crane retracts the rod and leaves, and the steel frame 10 is lifted vertically by the electric hoist;

[0041] S7, arrange the electric hoist horizontally and adjust the angle of the steel frame 10;

[0042] S8, after the angle of the steel frame 10 is adjusted, the position and posture of the steel frame 10 are re-measured, and the hanging rods are welded to fix the steel frame;

[0043] ​S9. Hoist the divided blocks corresponding to the end screen 40 and install them on the steel frame.

[0044] In step S3, reserve a flat processing site at the construction site, form supports using square steel and cushion wood, arrange the square steel pipes according to the drawing dimensions to form longitudinal main keels; through calibration with a level, adjust the upper plane of the longitudinal main keels to the same elevation plane.

[0045] Further, according to the drawing dimensions, assemble the transverse trusses onto the longitudinal main keels in sequence from the middle to both sides.

[0046] In step S4, on the inner ring beam of the steel structure of the stadium main canopy, use a total station to find four suitable points for hoisting as the four hanging points for hanging electric hoists, which are used for hoisting the steel truss.

[0047] Further, customize wire rope sleeves, hang them on the corresponding hanging points on the inner ring beam of the steel structure of the stadium main canopy, and use rubber sheets to protect the steel members at the hanging point parts.

[0048] In step S5, after using a truck crane to transport the steel frame to the hoisting position, lift it to the preset height; connect the hook under the electric hoist to the wire rope sleeve at the lifting point of the frame; when the frame is at a certain distance from the ground, the staff carry out the hooking operation; after the frame is lifted to a certain height, use a boom lift to send the staff onto the frame to carry out the hooking operation.

[0049] In step S6, operate the electric hoist for a trial hoist. After determining that it operates normally and is qualified, the electric hoist operates to lift the steel frame to an appropriate distance, causing the crane hook to relax, and then carry out the unhooking operation of the truck crane; the truck crane retracts the boom and leaves, and the staff withdraws from the steel frame. The electric hoist operates for vertical lifting; after the steel truss is lifted to the installation height, use the boom lift to transport the staff to the steel frame again.

[0050] In step S7, horizontally arrange two electric hoists, connect one end to the main steel structure members, and tie the other end with a large rope, and deliver it to the personnel who have already entered the inside of the steel truss at the height of the catwalk. Hook this end of the electric hoist on the bottom square pipe at the rear of the steel frame; use the horizontal electric hoist to pull the lower part of the steel frame to adjust the angle of the steel frame, and control and adjust the steel frame to the designed angle; the electric hoist always remains in a stressed state until all the connecting suspension rods 20 shown in the connection with the reserved connection points of the main steel structure are welded, and then slowly loosen the horizontal electric hoist. Figure 2 After all the welding of the connection suspension rods 20 shown is completed, slowly loosen the horizontal electric hoist.

[0051] In step S8, after the steel frame angle is adjusted, the steel frame elevation and inclination are re-measured; after the re-measurement is qualified, the connecting rod 20 is fixed and fixed to the inner ring truss; the support hanger part is measured and laid out on site using PVC pipes of the same diameter, and the connecting rod 20 is processed and welded to the reserved connection points of the main steel structure and the steel frame. Specifically, the connecting rod 20 is welded and fixed to the side of the inverted triangle truss 30 in the stadium.

[0052] After the welding of the connecting rod 20 is completed, the electric hoist is gradually unloaded until all the hanging ropes are completely relaxed, and then the hoist can be removed.

[0053] In step S9, after the steel frame 10 is installed and accepted, the end screen 40 is hoisted and installed piece by piece, and debugging is performed after the installation is completed.

[0054] Compared with the shortcomings and deficiencies of the prior art, the present invention provides a method for installing a large-angle end screen with a cantilever structure on top. The method has a reasonable structure and solves the installation method of the end screen in such a large stadium, fully reduces the occupation of the lower working surface, and ensures the efficiency of the installation operation.

[0055] The present invention is not limited to the above-mentioned implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the protection scope of the present invention.

Claims

1. A method for installing a high-angle end screen with a cantilever structure above, characterized in that: include: S1, using BIM modeling to simulate the installation process of the large-angle end screen, determine the layout of the electric hoist and the location of the steel frame lifting point; S2, prefabricate single steel trusses and multiple steel trusses constituting the steel frame, and transport them to the construction site; S3, secondary assembly is performed at the construction site to form the longitudinal main keel and transverse trusses, and connect the truss connecting members; S4, arrange electric hoist hanging points on the inner ring beam of the stadium main canopy steel structure; S5, using a truck crane to hoist the steel frame to a preset height, and hanging the hook under the electric hoist on the lifting point of the steel frame; S6, after the electric hoist is qualified in the trial lifting, the steel frame is lifted by the electric hoist to loosen the hook of the truck crane, and then the hook is removed from the truck crane; the truck crane is retracted and moved away, and the steel frame is lifted vertically by the electric hoist; S7, arrange the electric hoist horizontally and adjust the angle of the steel frame; S8, after the angle of the steel frame is adjusted, the position and posture of the steel frame are re-measured, and the hanging rods are welded to fix the steel frame; S9, hoist the blocks corresponding to the end screen and install them on the steel frame; In step S3, a flat processing site is reserved at the construction site, square steel and pads are used to form a support, and the square steel pipe installation drawing dimensions are arranged to form a longitudinal main keel; the upper plane of the longitudinal main keel is adjusted to the same elevation plane through level calibration.

2. The method for installing a high-angle end screen according to claim 1, characterized in that: According to the dimensions on the drawing, assemble the transverse trusses from the middle to both sides onto the longitudinal main keel.

3. The method for installing a high-angle end screen according to claim 1, characterized in that: In step S4, four points suitable for hoisting are found on the inner ring beam of the steel structure of the stadium main canopy using a total station, which are used as four hanging points for hanging electric hoists for steel truss hoisting.

4. The method for installing a high-angle end screen according to claim 3, characterized in that: Customized wire rope sleeves are hung on the corresponding hanging points on the inner ring beam of the steel structure of the main canopy of the stadium. Rubber is used to protect the steel components at the hanging points.

5. The method for installing a high-angle end screen according to claim 1, characterized in that: In step S5, the steel frame is transported to the lifting position by a truck crane and then lifted to a preset height; the hook below the electric hoist is connected to the wire rope sleeve at the frame lifting point; when the frame is a certain distance from the ground, the staff performs the hooking operation; after the frame is raised to a higher height, the staff is sent to the frame by a boom truck to perform the hooking operation.

6. The method for installing a high-angle end screen according to claim 1, characterized in that: In step S6, the electric hoist is operated for trial lifting. After confirming that the operation is normal and qualified, the electric hoist is operated to lift the steel frame to an appropriate distance, so that the crane hook is released, and then the truck crane is used to remove the hook; the truck crane retracts the pole and leaves, the staff withdraws from the steel frame, and the electric hoist is operated for vertical lifting; after the steel truss is lifted to the installation height, the articulated arm truck is used again to transport the staff to the steel frame.

7. The method for installing a high-angle end screen according to claim 1, characterized in that: In step S7, two electric hoists are arranged horizontally, one end of which is connected to the main steel structure rod and the other end is tied with a large rope, which is delivered to the personnel who have climbed up to the inside of the steel truss at the height of the horseway, and this end of the electric hoist is hooked on the bottom square tube at the rear of the steel frame; the lower part of the steel frame is pulled by the horizontal electric hoist to adjust the angle of the steel frame, and the steel frame is controlled to be adjusted to the designed angle; the electric hoist is always kept in a stressed state until all the connecting hangers at the reserved connection points with the main steel structure are welded, and then the horizontal electric hoist is slowly released.

8. The method for installing a high-angle end screen according to claim 1, characterized in that: In step S8, after the steel frame angle is adjusted, the elevation and inclination of the steel frame are re-measured; after the re-measurement is qualified, the connecting rod is fixed and fixed to the inner ring truss; the support hanger position is measured and laid out on-site using PVC pipes of the same diameter, and the connecting rod is processed and welded to the reserved connection points of the main steel structure and the steel frame.

9. The method for installing a high-angle end screen according to claim 8, characterized in that: After the welding of the connecting rod is completed, the electric hoist is gradually unloaded until all the hanging ropes are completely relaxed, and then the hoist can be removed.

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