Construction method of large-span protective shed and application of large-span protective shed in reinforcement cage machining

Abstract

The invention discloses a construction method of a large-span protective shed and application of the large-span protective shed in reinforcement cage machining. The construction method comprises the following steps that S10, the mounting positions of stand columns of the protective shed are cleaned and leveled in a construction site; s20, the installation position is positioned according to the snapping line, so that the stand column is accurately installed through the base; s30, a main beam is installed on each column of stand columns so that the main beams can be welded, assembled and arched according to the technological requirements; s40, a plurality of cross beams are welded between the main beams; and S50, color steel tiles are laid on the cross beams. When the large-span protective shed machined through the construction method is applied to machining of the reinforcement cage, the protective shed can be used for well protecting workers, equipment and materials, and meanwhile after the reinforcement cage is machined, the reinforcement cage can be conveniently transferred out of the protective shed through the inclined plates. Therefore, the construction method can adapt to construction of different types of large-span protective sheds, and the large-span protective sheds can achieve the effects of effective protection and convenient machining and transferring of the reinforcement cage.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction technology, and specifically relates to a construction method of a large-span protection shed and an application of the method in the processing of a steel cage. Background Art

[0002] In construction projects, since steel cages are large-sized components, they require a large site for processing. In some cases, a protective shed needs to be built behind the scenes to protect personnel, equipment and materials from the external environment. Therefore, a larger protection area is required, and the span generally needs to be more than 30 meters. However, the existing protective sheds generally have a small span, usually no more than 15 meters, so it is difficult to meet the protection needs of large spans (more than 30 meters). As the scale of construction projects continues to expand, the demand for large-span steel protective sheds is also increasing. Therefore, a new installation and construction method is needed to solve the problem of erecting large-span protective sheds. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a construction method for a large-span protective shed and its application in the processing of steel cages, which can be adapted to the processing of large-size steel cages, and the constructed protective shed has the advantages of stable and reliable structure, high construction efficiency, low cost, and flexible adjustment.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A construction method for a large-span protective shed comprises the following steps:

[0006] S10: Clean and level the installation location of the protective shed columns in the construction site according to the base cleaning requirements;

[0007] S20: Locate the installation position of the base of the column to be installed according to the elastic line, so as to accurately install the column through the base, and the column is in two rows;

[0008] S30: Install the main beam on each column so that the main beam is welded, assembled and arched according to the process requirements;

[0009] S40: welding a plurality of cross beams between the main beams, and distributing the cross beams at equal intervals;

[0010] S50: Color steel tiles are laid on the crossbeams to firmly connect the color steel tiles to the crossbeams, thereby realizing the shielding function of the protective shed.

[0011] Furthermore, in the S20, the column adopts the following structure and installation method: the cross-sectional size of the column is 400mm*400mm, and the column is composed of four 100mm*100mm*2.5mm square steels welded by welding blocks, and the length of the square steel can be adjusted according to actual needs; the column installation method: a 12mm thick steel plate is welded at the bottom of the column, and the steel plate is fixed to the concrete base by expansion bolts, and at the same time, two cross 50mm*50mm square steels are added in the horizontal direction of the column to form shear braces for reinforcement; after the column is installed, a 20mm diameter steel bar is embedded in the bottom plate, and then steel bars are added horizontally and welded to the embedded steel bars and the column, and finally concrete is poured for reinforcement.

[0012] Furthermore, in the S30, the main beam adopts the following structure and method: the main beam is welded and assembled with several 400mm*600mm*2mm square steels, and the middle part of the main beam is arched upward by 1.2m; the main beam installation method: the steel plate is welded at the fixed point between the main beam and the column, the steel plate is fully welded to the column, and the steel plate is locked and connected to the column by bolts, and the lower end of the connection position between the main beam and the column is welded with angle steel for support and fixation, and at the same time, a diagonal brace is set between the main beam and the column to form secondary reinforcement.

[0013] Furthermore, in the S40, the crossbeam adopts the following structure and installation method: the crossbeam includes a large crossbeam and a small crossbeam, the large crossbeam is welded by several 50mm*50mm*2mm square steels, the cross-section of the large crossbeam is 400mm*600mm, and the spacing between adjacent large crossbeams is not more than 5m; the small crossbeam adopts a single 50mm*50mm square steel, the spacing between adjacent small crossbeams is 0.9m, and both ends of the large crossbeam and the small crossbeam are welded to the main beam by full welding.

[0014] Furthermore, when installing the large crossbeam and the small crossbeam, the following method is adopted: multiple positioning pieces are set on the main beam along the length direction, and the positioning pieces of the two main beams correspond to each other, connecting pieces are installed at both ends of the large crossbeam and the small crossbeam, and the connecting pieces are adapted to the positioning pieces. When installing the large crossbeam and the small crossbeam, the connecting pieces at the end are adapted to the corresponding positioning pieces, and then connected to the main beam by full welding.

[0015] Furthermore, regarding the structure adopted by the positioning member and the connecting member: the positioning member includes a rotating shaft, a round handle arranged on one end of the rotating shaft, and an open support arranged on the round handle, and the round handle is provided with a through hole; the connecting member includes a support block arranged at the end of the large beam and / or the small beam, and the large beam and the small beam are plugged and adapted with the open support through the support block, and the open support is rotated by the rotating shaft until the large beam or the small beam can be supported on the open support through the support block, and then bolts are passed through the through holes and locked and fixed to the main beam to limit the rotation of the open support, and the large beam and the small beam are further welded to the main beam by full welding.

[0016] Furthermore, in S50, when laying and installing the color steel tiles, the following method is adopted: a slide rail with a slide groove is installed on the top surface of the large beam and the small beam, the slide rail extends along the length direction of the beam, and the color steel tile is equally divided into several sections along the length direction of the main beam. The width of each section of the color steel tile is the distance between adjacent large beams, and several rows of sliders are arranged on the plane of each section of the color steel tile. The spacing between the rows of sliders is the spacing between adjacent small beams. The slider is slidably connected to the slide groove of the slide rail, and both ends of each section of the color steel tile corresponding to the two main beams are connected and fixed to the main beams by fixing parts.

[0017] Furthermore, regarding the use of fixing parts to connect and fix to the main beam, the following structure and method can be used: the fixing parts use sealing blocks set on the plane of the color steel tile and sealing plugs set on the side of the sealing block away from the slider. When the color steel tile is slidably matched with the slide grooves of several slide rails through several sliders, the color steel tile is further pushed to make the sealing plug fit with the end of the slide groove, and the sealing block is abutted against the end of the slide rail, and the sealing block is further locked and fixed to the end face of the slide rail by screws.

[0018] Furthermore, in the S50, after the installation of each section of the color steel tile is completed, the following method is adopted: a waterproof aluminum film is pasted between adjacent sections of the color steel tile to improve the sealing between the adjacent sections of the color steel tile.

[0019] An application of a large-span protective shed in the processing of a steel cage comprises a large-span protective shed, wherein the large-span protective shed is processed by the above-mentioned construction method, wherein a working platform for welding and processing the steel cage is arranged inside the large-span protective shed, an inclined plate is arranged on one side of the working platform, and columns on both sides of the large-span protective shed cross the inclined plate; after the steel cage processing is completed on the working platform, the steel cage is pushed outside the large-span protective shed with the help of the inclined plate for subsequent handling operations.

[0020] The present invention has the following beneficial effects:

[0021] 1. The construction method of the large-span protective shed of the present invention, wherein the overall structure of the large-span steel bar protective shed is mainly composed of columns, main beams, cross beams and color steel tiles, and then through reasonable connection methods and reinforcement measures, the structural stability and reliability of the large-span protective shed are ensured, so that it has good wind and earthquake resistance; at the same time, the present invention adopts standardized design and modular construction, and each component can flexibly adjust the size and form according to actual needs to adapt to different construction sites and environmental requirements; and the present invention uses high-quality protective materials, such as color steel tiles, which can effectively achieve functions such as sunshade, windproof, rainproof, and dustproof, providing a good working environment for construction. Based on this, the present invention successfully built a large-span steel bar protective shed through the construction method of the large-span protective shed. When processing large-sized steel cages, it can meet the protection needs of personnel, equipment and materials during the project construction process, effectively ensure construction safety, and at the same time improve construction efficiency and reduce construction costs, providing a good reference example for similar projects; during the construction process, strictly follow the quality control and guarantee measures to ensure the quality and performance of the protective shed. Compared with the existing technology that is unable to build large-span steel bar protection sheds, the construction method of the present invention has the advantages of stable and reliable structure, high construction efficiency, low cost, and flexible adjustment. It effectively solves the problem of erecting large-span steel bar protection sheds in construction projects, provides a good working environment for construction, and ensures construction safety.

[0022] 2. Application of the large-span protective shed of the present invention in the processing of steel cages. When the large-span protective shed of the present invention is applied to the processing of steel cages, the workers can weld and process the steel cages in the large-span protective shed, so that the protective shed can provide good protection for the workers, equipment and materials. At the same time, after the processing is completed, the inclined plate can be used to transfer the steel cages outside the protective shed, which makes the transportation and operation simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a process flow chart of the construction method of the present invention.

[0024] Figure 2 It is a structural schematic diagram of the protection shed of the present invention.

[0025] Figure 3 It is a schematic diagram of the connection between the column of the present invention and the concrete base through the steel plate.

[0026] Figure 4 It is a schematic diagram of the steel column foot of the column of the present invention.

[0027] Figure 5 It is a schematic structural diagram of the positioning member of the present invention.

[0028] Figure 6 This is a schematic diagram of the large-span protection shed of the present invention when processing the steel cage.

[0029] In the figure: 1. column; 2. main beam; 3. cross beam; 4. color steel tile; 5. positioning piece; 51. rotating shaft; 52. round handle; 53. open support; 54. through hole; 6. working platform; 7. inclined plate; 8. steel cage. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The terms such as "upper", "inner", "middle", "left", "right" and "one" cited in this specification are only for the convenience of description, and are not used to limit the scope of the present invention. The change or adjustment of their relative relationship shall also be regarded as the scope of the present invention without substantially changing the technical content.

[0031] When processing the steel cage 8 according to the prior art, it is necessary to protect the workers, related equipment and materials. However, due to the limited processing technology of the prior art, there is no large-span protective shed. Therefore, the construction method of the large-span protective shed of the present invention is designed. The construction method can adapt to the construction of different types of large-span protective sheds, and has the advantages of stable and reliable structure, high construction efficiency, low cost, and flexible adjustment. It effectively solves the problem of erecting large-span steel protection sheds in construction projects, provides a good working environment for construction, and ensures construction safety. At the same time, when the processed large-span protective shed is used in the processing of the steel cage 8, the steel cage 8 can be safely processed under the protection of the large-span protective shed, and the steel cage 8 can be better transported, which has the advantages of simple operation and effective protection.

[0032] The following is a detailed introduction to the construction method of the large-span protective shed of the present invention:

[0033] Example 1

[0034] A construction method for a large-span protective shed, such as Figures 1 to 6 As shown, the following steps are included:

[0035] S10: Clean and level the installation position of the protective shed columns 1 in the construction site according to the base cleaning requirements.

[0036] S20: Locate the installation position of the base of the column 1 to be installed according to the elastic line, so as to accurately install the column 1 through the base, and the column 1 is in two rows;

[0037] In S20, column 1 adopts the following structure and installation method: the cross-sectional size of column 1 is 400mm*400mm, and column 1 is composed of four 100mm*100mm*2.5mm square steels welded by welding blocks. The length of the square steel can be adjusted according to actual needs; regarding the installation method of column 1: a 12mm thick steel plate is welded at the bottom of column 1, and the steel plate is fixed to the concrete base by expansion bolts. At the same time, two cross 50mm*50mm square steels are added horizontally to column 1 to form shear braces for reinforcement, thereby improving the stability of column 1 installation; after the installation of column 1 is completed, steel bars with a diameter of 20mm are embedded in the bottom plate, and then steel bars are added horizontally and welded to the embedded steel bars and column 1, and finally concrete is poured for reinforcement to further improve the stability of column 1 installation.

[0038] S30: The main beam 2 is welded and installed on the top of each column 1, so that the main beam 2 is welded, assembled and arched according to the process requirements.

[0039] In S30, the main beam 2 adopts the following structure and method: the main beam 2 is welded and assembled with several 400mm*600mm*2mm square steels, and the middle part of the main beam 2 is arched upward by 1.2m; regarding the installation method of the main beam 2: the main beam 2 is located at the fixed point between the column 1 and the steel plate is welded, the steel plate is fully welded to the column 1, and the steel plate is locked and connected to the column 1 by bolts, and the lower end of the connection position between the main beam 2 and the column 1 is welded with angle steel for support and fixation, and at the same time, a diagonal brace is set between the main beam 2 and the column 1 to form a secondary reinforcement, thereby improving the stability and structural strength of the support of the main beam 2.

[0040] At the same time, it should be noted that when implementing the method of the present invention, since it involves welding steps, it is necessary to limit the welding environment, preparation before welding, and personnel qualifications, as follows:

[0041] 1) Welding environment control: ① The welding area should be kept dry, free of oil, rust, water, oxide scale and other contaminants. ② The welding rods and flux should be baked according to regulations. After low-hydrogen welding rods are dried, they should be placed in an insulation box (drum) for use. There are strict restrictions on the time from taking the welding rods out of the insulation box (drum) to welding. If they do not meet the requirements, they need to be dried again, but the number of times should not exceed 2 times. ③ When the wind speed and humidity exceed the limit, windproof and dehumidification measures should be taken. When the ambient temperature is below 0℃, the weldment needs to be heated. The heating temperature is determined based on a variety of factors. The welding technical responsible person formulates the operation plan and implements it after confirmation.

[0042] 2) Preparation before welding: ① The welder shall review the quality of the welded joints and the treatment of the welding area. If they do not meet the requirements, they shall be repaired and welded. ② Before welding, clean the welding wire, remove rust and oil stains, bake and dehumidify the nozzle, studs and ceramic rings before use, ensure that the welding wire is coiled neatly and tightly and meets the welding requirements, all welding parts work normally, and ensure stable power supply.

[0043] 3) Personnel qualification requirements: Welders must pass the examination and obtain the corresponding qualification certificate, and perform welding within the items they have passed the examination and the scope of approval.

[0044] S40: welding a plurality of cross beams 3 between the main beams 2, and distributing the cross beams 3 at equal intervals;

[0045] In S40, the beam 3 adopts the following structure and installation method: the beam 3 includes a large beam 3 and a small beam 3. The large beam 3 is welded by several 50mm*50mm*2mm square steels. The cross section of the large beam 3 is 400mm*600mm, and the spacing between adjacent large beams 3 is not more than 5m; the small beam 3 adopts a single 50mm*50mm square steel, and the spacing between adjacent small beams 3 is 0.9m, and both ends of the large beam 3 and the small beam 3 are welded to the main beam 2 by full welding.

[0046] When installing the large beam 3 and the small beam 3, the following method is used: multiple positioning pieces 5 are arranged on the main beam 2 along the length direction, and the positioning pieces 5 of the two main beams 2 correspond to each other, and connecting pieces are installed at both ends of the large beam 3 and the small beam 3, and the connecting pieces are adapted to the positioning pieces 5. When installing the large beam 3 and the small beam 3, the connecting pieces at the end are adapted to the corresponding positioning pieces 5, and then connected to the main beam 2 by full welding; therefore, the method of positioning and adapting the connecting pieces to the positioning pieces 5 and then welding can effectively improve the convenience of operation. The positioning pieces 5 and the connecting pieces can adopt the structure of jacks and positioning pins.

[0047] S50: laying colored steel tiles 4 on the crossbeams 3, so that the colored steel tiles 4 are firmly connected to the crossbeams 3, thereby realizing the shielding function of the protective shed.

[0048] Example 2

[0049] like Figures 1 to 5 As shown, Example 2 is a technical solution extended on the basis of Example 1. The differences between Example 2 and Example 1 are as follows:

[0050] In S40, regarding the structures adopted by the positioning member 5 and the connecting member: the positioning member 5 includes a rotating shaft 51 rotatably connected to the main beam 2, a round handle 52 arranged on one end of the rotating shaft 51, and an open support 53 arranged on the round handle 52, and the round handle 52 is provided with a through hole 54; the connecting member includes a support block arranged at the end of the large beam 3 and / or the small beam 3, the large beam 3 and the small beam 3 are plugged and adapted with the open support 53 through the support block, and the open support 53 is rotated by the rotating shaft 51 until the large beam 3 or the small beam 3 can be well supported on the open support 53 through the support block, and then the bolt is passed through the through hole 54 and locked and fixed to the main beam 2 to limit the rotation of the open support 53, and the large beam 3 and the small beam 3 are further welded to the main beam 2 by full welding, thereby achieving the advantage of simple operation.

[0051] In S50, when laying and installing the color steel tile 4, the following method is adopted: a slide rail with a slide groove is installed on the top surface of the large beam 3 and the small beam 3, the slide rail extends along the length direction of the beam 3, the color steel tile 4 is equally divided into several sections along the length direction of the main beam 2, the width of each section of the color steel tile 4 is the distance between the adjacent large beams 3, and the plane of each section of the color steel tile 4 is provided with several rows of sliders, the spacing of the several rows of sliders is the spacing of the adjacent small beams 3, the sliders are slidably connected with the slide grooves of the slide rails, and both ends of each section of the color steel tile 4 corresponding to the two main beams 2 are connected and fixed with the main beam 2 by fixing parts. Therefore, after the fixing parts are released from the connection and fixation with the main beam 2, the function of replacing the color steel tile 4 can be realized by the sliding cooperation between the slider and the slide groove, and it has the advantage of simple operation.

[0052] In S50, regarding the use of fixing parts to connect and fix the main beam 2, the following structure and method can be used: the fixing parts use sealing blocks set on the plane of the color steel tile 4 and sealing plugs set on the side of the sealing block away from the slider. When the color steel tile 4 slides and fits with the slide grooves of several slide rails through several sliders, the color steel tile 4 is further pushed to make the sealing plug fit with the end of the slide groove, and the sealing block abuts against the end of the slide rail, and the sealing block is further locked and fixed with the end face of the slide rail by screws. Therefore, by setting the sealing block and the sealing plug of the fixing parts to be locked and connected with the slide rail, it has the advantage of simple operation during the subsequent removal operation, and the plugging of the sealing plug with the end of the slide groove can play a good positioning role.

[0053] In S50 , after the installation of each section of the color steel tile 4 is completed, the following method is adopted: a waterproof aluminum film is pasted between adjacent sections of the color steel tile 4 to improve the sealing between the adjacent sections of the color steel tile 4 .

[0054] In summary, the construction method of the large-span protective shed of the present invention, wherein the overall structure of the large-span steel bar protective shed is mainly composed of columns 1, main beams 2, cross beams 3 and color steel tiles 4, and then through reasonable connection methods and reinforcement measures, the structural stability and reliability of the large-span protective shed are ensured, so that it has good wind and earthquake resistance; at the same time, the present invention adopts standardized design and modular construction, and each component can flexibly adjust the size and form according to actual needs to adapt to different construction sites and environmental requirements; and the present invention selects high-quality protective materials, such as color steel tiles 4, which can effectively achieve functions such as sunshade, windproof, rainproof, and dustproof, providing a good working environment for construction. Based on this, the present invention successfully built a large-span steel bar protective shed through the construction method of the large-span protective shed. When processing the large-sized steel cage 8, it can meet the protection requirements of personnel, equipment and materials during the project construction process, effectively ensure construction safety, and at the same time improve construction efficiency and reduce construction costs, providing a good reference example for similar projects. During the construction process, strictly follow the quality control and guarantee measures to ensure the quality and performance of the protective shed. Compared with the existing technology that is unable to build large-span steel bar protection sheds, the construction method of the present invention has the advantages of stable and reliable structure, high construction efficiency, low cost, and flexible adjustment. It effectively solves the problem of erecting large-span steel bar protection sheds in construction projects, provides a good working environment for construction, and ensures construction safety.

[0055] Example 3

[0056] like Figures 1 to 6 As shown, an application of a large-span protection shed in the processing of a steel cage 8 includes a large-span protection shed, which is processed by the construction method of Example 1 and Example 2. A working platform 6 for welding and processing the steel cage 8 is provided in the large-span protection shed. A recessed portion for stably placing the steel cage 8 is provided on the processing platform, so that the staff can better weld and process the steel cage 8. An inclined plate 7 is provided on one side of the working platform 6. The inclined plate 7 can also be replaced by an inclined support bracket. The columns on both sides of the large-span protection shed cross the inclined plate 7 so that the inclined plate 7 extends out of the large-span protection shed. After the steel cage 8 is processed on the working platform 6, the staff can use the inclined plate 7 to push the steel cage 8 outside the large-span protection shed for subsequent handling operations.

[0057] It can be seen from this that when the large-span protective shed processed by Example 1 and Example 2 is used in the processing of the steel cage 8, the staff can weld and process the steel cage 8 in the large-span protective shed, so as to use the protective shed to provide good protection for the staff, equipment and materials. At the same time, after the processing is completed, the inclined plate 7 can be used to transfer the steel cage 8 to the outside of the protective shed, which facilitates the transportation operation.

[0058] The implementation methods of the present invention are not limited to this. According to the above content of the present invention, using common technical knowledge and customary means in the field, without departing from the above basic technical ideas of the present invention, the present invention can also make other various forms of modification, replacement or combination, all of which fall within the scope of protection of the present invention.

Claims

1. A construction method for a large-span protective shed, characterized in that: The following steps are involved: S10: Clean and level the installation location of the protective shed columns in the construction site according to the base cleaning requirements; S20: Locate the installation position of the base of the column to be installed according to the elastic line, so as to accurately install the column through the base, and the column is in two rows; S30: Install the main beam on each column so that the main beam is welded, assembled and arched according to the process requirements; S40: welding a plurality of cross beams between the main beams, and distributing the cross beams at equal intervals; S50: Color steel tiles are laid on the crossbeams to firmly connect the color steel tiles to the crossbeams, thereby realizing the shielding function of the protective shed.

2. The construction method of the long-span protective shed according to claim 1, characterized in that: In the S20, the column adopts the following structure and installation method: the cross-sectional size of the column is 400mm*400mm, and the column is composed of four 100mm*100mm*2.5mm square steels welded by welding blocks. The length of the square steel can be adjusted according to actual needs; the installation method of the column: a 12mm thick steel plate is welded at the bottom of the column, and the steel plate is fixed to the concrete base by expansion bolts. At the same time, two cross 50mm*50mm square steels are added in the horizontal direction of the column to form shear braces for reinforcement; after the column is installed, a steel bar with a diameter of 20mm is embedded in the bottom plate, and then steel bars are added horizontally and welded to the embedded steel bars and the column, and finally concrete is poured for reinforcement.

3. The construction method of the long-span protective shed according to claim 1, characterized in that: In the S30, the main beam adopts the following structure and method: the main beam is welded and assembled with several 400mm*600mm*2mm square steels, and the middle part of the main beam is arched upward by 1.2m; the main beam installation method: the steel plate is welded at the fixed point between the main beam and the column, the steel plate is fully welded to the column, and the steel plate is locked and connected to the column by bolts, and the lower end of the connection position between the main beam and the column is welded with angle steel for support and fixation, and at the same time, a diagonal brace is set between the main beam and the column to form secondary reinforcement.

4. The construction method of the long-span protective shed according to claim 1, characterized in that: In the S40, the crossbeam adopts the following structure and installation method: the crossbeam includes a large crossbeam and a small crossbeam, the large crossbeam is welded by several 50mm*50mm*2mm square steels, the cross-section of the large crossbeam is 400mm*600mm, and the spacing between adjacent large crossbeams is not more than 5m; the small crossbeam adopts a single 50mm*50mm square steel, the spacing between adjacent small crossbeams is 0.9m, and both ends of the large crossbeam and the small crossbeam are welded to the main beam by full welding.

5. The construction method of the long-span protective shed according to claim 4, characterized in that: When installing the large beam and the small beam, the following method is used: multiple positioning pieces are set on the main beam along the length direction, and the positioning pieces of the two main beams correspond to each other, connecting pieces are installed at both ends of the large beam and the small beam, and the connecting pieces are matched with the positioning pieces. When installing the large beam and the small beam, the connecting pieces at the end are matched with the corresponding positioning pieces, and then connected to the main beam by full welding.

6. The construction method of the long-span protective shed according to claim 5, characterized in that: Regarding the structure adopted by the positioning member and the connecting member: the positioning member includes a rotating shaft, a round handle arranged on one end of the rotating shaft, and an open support arranged on the round handle, and the round handle is provided with a through hole; the connecting member includes a support block arranged at the end of the large beam and / or the small beam, and the large beam and the small beam are plugged and adapted with the open support through the support block, and the open support is rotated by the rotating shaft until the large beam or the small beam can be supported on the open support through the support block, and then bolts are passed through the through holes and locked and fixed to the main beam to limit the rotation of the open support, and the large beam and the small beam are further welded to the main beam by full welding.

7. The construction method of the long-span protective shed according to claim 4, characterized in that: In the S50, when laying and installing the color steel tiles, the following method is adopted: a slide rail with a slide groove is installed on the top surface of the large beam and the small beam, the slide rail extends along the length direction of the beam, the color steel tile is equally divided into several sections along the length direction of the main beam, the width of each section of the color steel tile is the distance between adjacent large beams, and several rows of sliders are arranged on the plane of each section of the color steel tile, and the spacing between the rows of sliders is the spacing between adjacent small beams. The slider is slidably connected to the slide groove of the slide rail, and both ends of each section of the color steel tile corresponding to the two main beams are connected and fixed to the main beam by fixing parts.

8. The construction method of the long-span protective shed according to claim 7, characterized in that: Regarding the use of fixing parts to connect and fix to the main beam, the following structure and method can be used: the fixing parts use sealing blocks set on the plane of the color steel tile and sealing plugs set on the side of the sealing block away from the slider. When the color steel tile is slidably adapted to the slide grooves of several slide rails through several sliders, the color steel tile is further pushed to make the sealing plug fit into the end of the slide groove, and the sealing block is abutted against the end of the slide rail, and the sealing block is further locked and fixed to the end face of the slide rail by screws.

9. The construction method of the long-span protective shed according to claim 7, characterized in that: In the S50, after the installation of each section of the color steel tile is completed, the following method is adopted: a waterproof aluminum film is pasted between adjacent sections of the color steel tile to improve the sealing between the adjacent sections of the color steel tile.

10. Application of a large-span protective shed in the processing of steel cages, characterized in that: It comprises a large-span protective shed, which is processed by the construction method as described in any one of claims 1 to 9, and is provided with a working platform for welding and processing a steel cage, and an inclined plate is provided on one side of the working platform, and columns on both sides of the large-span protective shed cross the inclined plate; after the steel cage is processed on the working platform, the steel cage is pushed outside the large-span protective shed with the help of the inclined plate for subsequent handling operations.

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