Steel structure combined hoisting construction method for ladder stand and working platform

Abstract

The invention relates to a steel structure combined hoisting construction method and a working platform for a ladder stand, the construction method adopts the working platform, a high-altitude operation vehicle and hoisting equipment for cooperative construction, and the construction method comprises the following steps: setting up the working platform: setting up the working platform on the ladder stand, the operation platform stretches across at least two steps, one side of the operation platform is supported on the lower step, the other side of the operation platform is in lap joint with the upper step, and therefore a temporary bearing operation face is formed on the step stand face; according to the construction method, a set of complete and recyclable erection-in-place-installation-transfer flow construction method is constructed, a movable temporary expansion working face is rapidly constructed on a stand, and the bottleneck that an overhead working truck cannot be applied to the step terrain is ingeniously solved; the fundamental conversion from non-construction or low-efficiency frame building construction to efficient mechanical flow construction is achieved, and the construction efficiency of steel structure installation in height difference areas such as a stand is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of steel structure construction technology, and specifically to a method and work platform for the combined hoisting construction of steel structures for tiered grandstands. Background Technology

[0002] With the increasing construction of large sports stadiums, auxiliary structures such as catwalks are often required to be installed under the steel structure roof. These catwalk steel beams are located between the enclosed steel roof and the stepped stands below, forming a construction area with a height difference.

[0003] Traditional construction methods face serious challenges: if a truck crane and a scissor lift are used together, the scissor lift cannot be stably positioned and operated on the stepped grandstand; if a full-span scaffold is erected in the grandstand area as a working platform, there are problems such as a large amount of erection work, a long construction period, high material costs, and interference with other work processes.

[0004] Therefore, there is an urgent need for a construction method and supporting equipment that can adapt to the special terrain of the tiered grandstand and achieve the rapid, efficient, safe and economical installation of the steel structure components above the grandstand area. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects of the prior art and provide a method and working platform for the combined hoisting construction of steel structures for stepped grandstands, which can safely, quickly and economically complete the hoisting and installation of the upper steel structure components in the stepped grandstand area without erecting full-span scaffolding.

[0006] To achieve the above objectives, the present invention provides a method for the combined hoisting construction of steel structures for tiered grandstands, employing a work platform, an aerial work platform, and hoisting equipment in coordinated construction. The construction method includes the following steps: Erection of work platform: Erect a work platform on the tiered grandstand, so that the work platform spans at least two steps, with one side supported by the lower step and the other side attached to the upper step, thereby forming a temporary load-bearing work surface on the tiered grandstand. Aerial work vehicle positioning: Use hoisting equipment to lift the aerial work vehicle onto the working platform and the upper step it is attached to, so that the aerial work vehicle is supported on the working platform and the upper step on both sides respectively, and then fix the aerial work vehicle after positioning; Steel structure component installation: The steel structure components to be installed are hoisted to the design position using hoisting equipment. The operator then boards the aerial work platform and operates it to the work point of the steel structure component to complete the installation work. Platform and equipment transfer: After the installation work at the current work site is completed, the aerial work platform is lifted away, and then the work platform is transferred to the next work site. The above steps are repeated to carry out the construction in a continuous flow.

[0007] By adopting this technical solution, a complete and cyclical construction method of erection-positioning-installation-transfer has been established. By quickly constructing a movable temporary extended working surface on the grandstand, the bottleneck of aerial work platforms being unable to be used on stepped terrain has been cleverly solved. This has achieved a fundamental transformation from construction that is impossible or inefficient to erect scaffolding to efficient mechanized construction, significantly improving the construction efficiency, safety and economy of steel structure installation in areas with height differences such as grandstands.

[0008] Furthermore, the work platform is a steel platform, and is further reinforced to the tiered grandstand by diagonal bracing and / or steel wire rope tie-down components; The aerial work platform vehicle is a scissor lift. Once in place, its wheels are fixed in place and cannot be moved during operation.

[0009] By adopting this technical solution, the working platform is specified as a steel platform and its reinforcement method is clarified, providing a lightweight, high-strength, and easy-to-disassemble specific implementation plan, ensuring the platform's load-bearing capacity and temporary stability. At the same time, the aerial work vehicle is limited to a scissor lift and its fixed state is emphasized, clarifying the mainstream aerial work equipment that this method is applicable to and the fixed-point operation safety guidelines that must be followed, making the solution more specific, safe, and operable.

[0010] Furthermore, triangular wooden wedges are inserted into the wheels of the scissor cart for limiting and fixing.

[0011] By adopting this technical solution, it is possible to effectively prevent the scissor lift from slipping due to misoperation or vibration during operation. This is a key detail to ensure that the aerial work platform remains absolutely stationary on the temporary platform, greatly enhancing the safety of the entire construction process.

[0012] Furthermore, the steel structural components to be installed are the catwalk steel beams beneath the roof of the stadium; The lifting equipment was a truck crane.

[0013] By adopting this technical solution, the outstanding advantages of this invention in solving specific engineering problems (installing components in a narrow space under a large-span roof and above a grandstand) are defined, reflecting its practical engineering background and direct economic benefits.

[0014] Furthermore, when installing the walkway steel beams, first install the walkway hangers, then install the walkway radial ring beams, and finally install the walkway circumferential ring beams.

[0015] By adopting this technical solution, the sequence (suspender rod - radial beam - circumferential beam) ensures that the installed parts can form a stable system during the installation process, gradually bearing subsequent loads, avoiding the risk of structural instability during the installation process, while making the connection between each process smooth, and improving the overall installation efficiency and quality.

[0016] Furthermore, safety precautions include installing crash barriers and lifeline poles around the work platform.

[0017] By adopting this technical solution, the risk of people falling is effectively prevented.

[0018] The present invention also provides a working platform for realizing a steel structure combined hoisting construction method for tiered grandstands, comprising: The platform framework is designed to span at least two levels of grandstand steps; Support components are located on one side of the platform frame and are used to support the platform on the lower step. An overlapping component is formed on the opposite side of the platform frame from the side with the supporting component, and is used to overlap the upper step; A support panel is laid on the upper surface of the platform frame to form the temporary support working surface.

[0019] Furthermore, the work platform is a steel platform; The supporting components include legs, which are short H-shaped steel columns with steel pads at their bottom; The main beams of the platform frame are square tubes.

[0020] By adopting this technical solution, the optimal material and structural selection for the working platform is specified. The combination of H-shaped steel legs and steel pads provides sufficient support while protecting the concrete grandstand surface. The use of square tube main beams ensures the load-bearing capacity and torsional resistance of the platform frame.

[0021] Furthermore, it also includes reinforcing components, including diagonal braces connecting the platform frame and the grandstand structure.

[0022] By adopting this technical solution, the overall integrity and lateral stability of the platform frame are improved. The diagonal bracing can effectively transfer the horizontal force or overturning moment borne by the platform to the robust grandstand structure, ensuring that the platform will not shift or sway when subjected to the eccentric load that may be generated by the scissor lift, thereby ensuring the stability of high-altitude operations.

[0023] Furthermore, the reinforcing components also include wire rope tie rods.

[0024] By adopting this technical solution, steel wire rope tie components are further added, forming a dual anti-overturning guarantee of rigid diagonal bracing + flexible tie, which is particularly suitable for resisting dynamic effects such as wind loads, and is flexible in installation.

[0025] Compared with the prior art, the present invention has the following advantages: 1. The traditional practice of erecting large-scale scaffolding in the grandstand area has been abandoned. Instead, a special steel platform that can be quickly rotated is used. This platform, together with scissor lifts and truck cranes, forms an efficient combination, realizing a streamlined operation mode of erecting one point, installing one area, and immediately moving to the next area. This greatly reduces the material input, labor costs, and time consumption of scaffolding projects, resulting in outstanding economic and schedule benefits.

[0026] 2. The support and overlapping design creates a stable and level mechanized working surface on the steps, allowing the scissor lift to be safely and securely positioned for high-altitude operations, thus solving the problem of mechanized construction in areas with height differences. Attached Figure Description

[0027] Figure 1 This is a flowchart of the steel structure assembly hoisting construction method for tiered grandstands according to the present invention; Figure 2 This is a schematic diagram of the construction status of the steel structure combined hoisting construction method for tiered grandstands according to the present invention; Figure 3 This is a three-dimensional structural diagram of the working platform in this invention.

[0028] Explanation of reference numerals in the attached drawings: 1. Ladder grandstand; 2. Working platform; 21. Platform frame; 22. Supporting component; 23. Overlapping component; 24. Diagonal brace; 25. Wire rope tie; 26. Safety column; 27. Crane guardrail; 3. Truck crane; 4. Scissor lift. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] Please refer to the appendix. Figure 1 This invention provides a method for the combined hoisting construction of steel structures for tiered grandstands, which involves statistically analyzing and zoning the hoisting operations of the walkway steel beams in the ring truss area according to the construction drawings; such as... Figure 2 As shown, in order to complete the installation of the steel structure above the tiered grandstand 1, this method adopts a combination system of working platform 2, scissor lift 4 and truck crane 3. The working platform 2 is a special steel platform that can be quickly disassembled and reused.

[0031] Setting up work platform 2: Please see Figure 2 and Figure 3 A working platform 2 is erected on the tiered grandstand 1. The working platform 2 includes a platform frame 21, supporting components 22, connecting components 23, a reinforcement system, and safety protection facilities.

[0032] During erection, the assembled platform frame 21 is hoisted to the predetermined position, so that it spans at least two grandstand steps. The platform frame 21 consists of two parallel square tube main beams (specification RHS180*6) and secondary beams connecting them. The main beams extend along the grandstand steps.

[0033] The support component 22, located below one side of the platform frame 21, is placed on the concrete grandstand beam of the lower step. The support component 22 is a short H-shaped steel column (specification H294*200), with a steel pad at its bottom to distribute the load. At the same time, the overlapping component 23 (i.e., the extension end of the main beam) formed on the other side of the platform frame 21 overlaps the grandstand surface of the upper step, with the overlap length controlled between 250mm and 350mm. Through this method of one-sided support and one-sided overlap, the working platform 2 forms a stable and horizontal extended working surface on the grandstand.

[0034] Then, the reinforcement system is installed: First, the diagonal brace 24 is installed, with its lower end pressed against the lower grandstand and its upper end connected to the support component 22. To further enhance stability, angle steel or square tubes can be added between the diagonal brace 24 and the support component 22 to form a triangular stable structure.

[0035] Secondly, steel wire rope tie-down pieces 25 are used to tie the support component 22 to the sturdy main structure of the grandstand (such as structural columns) behind it. To improve safety, safety columns 26 are also added in the longitudinal direction of the grandstand.

[0036] Finally, patterned steel plates are laid on the platform frame 21 as load-bearing panels, making its surface flush with the top grandstand surface. Anti-collision guardrails 27 and lifeline poles are installed around the platform to complete the safety protection.

[0037] Scissors Cart 4 in place: After preparations are complete, the scissor lift 4 is lifted onto the work platform 2 using the truck crane 3.

[0038] like Figure 2 As shown, during hoisting, one side of the scissor lift 4 is positioned smoothly on the support panel of the work platform 2, while the other side is positioned on the upper step platform that it overlaps with. To ensure the absolute stability of the scissor lift 4 during operation, triangular wooden wedges are immediately inserted into the front and rear of all its wheels after positioning for limiting and fixing. It is stipulated that the scissor lift 4 is strictly prohibited from walking or moving during operation.

[0039] Installation of steel beams for the catwalk: The installation work is carried out in the following order: first the hangers, then the radial ring beam, and finally the circumferential ring beam.

[0040] First, the truck crane 3 lifts the walkway boom, and the operators complete the initial installation on other auxiliary equipment.

[0041] Subsequently, the radial ring beam of the walkway is installed; the truck crane 3 lifts the radial ring beam to the design position and temporarily fixes it; at this time, the operator climbs onto the work basket of the scissor lift 4, which has been positioned and fixed, through the platform; the operator operates the lifting arm of the scissor lift 4 to raise the work basket to the connection node between the radial ring beam and the main steel structure (such as the inclined column); the operator fastens the safety belt to the safety rope that is pre-set on the structure and performs bolt tightening or welding work at this node.

[0042] After the connections at both ends of a radial ring beam are completed, the truck crane 3 releases its hook. Following this method, the radial ring beams at each axis position are installed in sequence. The installation steps for the circumferential ring beams are similar.

[0043] Throughout the entire high-altitude operation, safety regulations must be strictly followed: tools and parts must be placed in tool bags, ground personnel must stay away from the hoisting area, and a safety warning zone must be set up and monitored by designated personnel.

[0044] Platform and equipment migration: After all the walkway steel beams at the current work point (usually within one axis range) are installed, the transfer step begins. First, the truck crane 3 lifts the scissor lift 4 off the work platform 2 and places it in a safe area. Then, the wire rope tie 25 is released, and the work platform 2 is lifted as a whole and transferred to the next planned work point.

[0045] Two working platforms 2 and two scissor lifts 4 can work together to carry out a continuous transport operation, realizing a cycle of erection-operation-transfer until the installation of the steel structure above the entire grandstand area is completed.

[0046] 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 steel structure combined hoisting construction method for a stepped stand, which is characterized by the fact that a working platform, an aerial work platform and a hoisting device are used for collaborative construction. The construction method includes the following steps: Erection of work platform: Erect a work platform on the tiered grandstand, so that the work platform spans at least two steps, with one side supported by the lower step and the other side attached to the upper step, thereby forming a temporary load-bearing work surface on the tiered grandstand. Aerial work vehicle positioning: Use hoisting equipment to lift the aerial work vehicle onto the working platform and the upper step it is attached to, so that the aerial work vehicle is supported on the working platform and the upper step on both sides respectively, and then fix the aerial work vehicle after positioning; Steel structure component installation: The steel structure components to be installed are hoisted to the design position using hoisting equipment. The operator then boards the aerial work platform and operates it to the work point of the steel structure component to complete the installation work. Platform and equipment transfer: After the installation work is completed at the current work site, the aerial work platform is lifted away, and then the work platform is transferred to the next work site. The above steps are repeated to carry out the construction in a continuous flow.

2. The steel construction combined hoisting construction method for a stepped stand according to claim 1, characterized by: The working platform is a steel platform, which is further reinforced to the tiered grandstand by diagonal bracing and / or steel wire rope tie-down components; The aerial work platform vehicle is a scissor lift. Once in place, its wheels are fixed in place and cannot be moved during operation.

3. The steel construction combined hoisting construction method for a stepped stand according to claim 2, characterized by: Triangular wooden wedges are inserted into the wheels of the scissor cart for positioning and fixation.

4. The steel construction combined hoisting construction method for a stepped stand according to claim 1, characterized by: The steel structural components to be installed are the catwalk steel beams under the roof of the stadium. The lifting equipment was a truck crane.

5. The steel construction combined hoisting construction method for a stepped stand according to claim 4, characterized by: When installing the walkway steel beams, first install the walkway hangers, then install the walkway radial ring beams, and finally install the walkway circumferential ring beams.

6. The steel construction combined hoisting construction method for a stepped stand according to claim 1, characterized by: It also includes safety protection measures: installing crash barriers and lifeline poles around the work platform.

7. A work platform for implementing the construction method according to any one of claims 1 to 6, characterized in that, include: The platform framework is designed to span at least two levels of grandstand steps; Support components are located on one side of the platform frame and are used to support the platform on the lower step. An overlapping component is formed on the opposite side of the platform frame from the side with the supporting component, and is used to overlap the upper step; A support panel is laid on the upper surface of the platform frame to form the temporary support working surface.

8. The work platform of claim 7, wherein: The work platform is a steel platform; The supporting components include legs, which are short H-shaped steel columns with steel pads at their bottom; The main beams of the platform frame are square tubes.

9. The work platform of claim 8, wherein: It also includes reinforcing components, including diagonal braces connecting the platform frame and the grandstand structure.

10. The work platform of claim 9, wherein: The reinforcement components also include wire rope tie-down parts.

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