A method for hoisting large-span roof steel structure

Abstract

The invention provides a large-span roof steel structure hoisting method, which belongs to the technical field of building installation. The large-span roof steel structure hoisting method comprises the following steps: using BIM software to divide the installation area of ​​the assembly units of the roof steel structure prefabricated parts; inspecting and accepting the prepared roof steel structure installation parts; numbering the roof steel structure prefabricated parts; transporting the roof steel structure prefabricated parts to the installation site; dividing the installation sequence area of ​​the entire roof; calibrating the positions of the vertical poles; arranging temporary roof steel structure supports; erecting scaffolding; assembling the assembly units of the roof steel structure prefabricated parts on the ground of the construction site; hoisting the assembled assembly units on the scaffolding to the installation height; assembling the assembly units; patching the assembled assembly units with loose parts; and conducting acceptance and inspection. The invention can simultaneously reduce the problems of high-altitude operations and construction difficulty.

Description

Technical Field

[0001] The invention belongs to the technical field of building installation, and in particular relates to a method for hoisting a large-span roof steel structure. Background Art

[0002] Large-span steel grid structures are a common roofing option for large domestic stadiums, industrial plants, theaters, and bus terminals. Their bold and expansive form embodies the rhythmic beauty of classical architecture while embodying the romance of modern art.

[0003] Currently, there are two main methods for installing large-span roof steel structures: one is on-site assembly, where a crane is used to lift the steel structure to the designated location and assemble it at high altitude. This method involves a lot of high-altitude work and low construction efficiency. The other is suspended installation, where the entire steel structure is prefabricated and then hoisted to the designated location using a crane. This method requires high equipment requirements for the entire steel structure, resulting in high costs. Furthermore, the large steel structure is difficult to control during installation, making construction difficult. Both methods have their shortcomings, which have a significant impact on construction time, efficiency, and costs.

[0004] The above two methods cannot simultaneously solve the problems of many high-altitude operations, slow construction efficiency, reducing construction difficulty, and facilitating the control and installation of steel structures. Summary of the Invention

[0005] In view of this, the present invention proposes a large-span roof steel structure hoisting method that can simultaneously solve the problems of many high-altitude operations and slow construction efficiency, reduce construction difficulty, and facilitate the control and installation of steel structures.

[0006] The present invention is achieved in that:

[0007] The present invention provides a method for hoisting a large-span roof steel structure, which comprises the following steps:

[0008] S01: Using BIM software to divide the installation area of ​​the assembly units of the roof steel structure prefabricated parts, wherein the assembly units are the roof steel structure prefabricated parts that can be assembled in a controlled manner after reducing the number of high-altitude assembly operations;

[0009] S02: Inspect and accept the prepared roof steel structure installation parts, and then perform sandblasting and primer maintenance after acceptance;

[0010] S03: Number the prefabricated steel structure parts of the roof according to the layout drawing and parts sketch;

[0011] S04: Transport the prefabricated roof steel structure components to the installation site;

[0012] S05: Divide the roof into installation order areas;

[0013] S06: Lay out the lines at the construction site according to the design dimensions, lay the pads, and mark the positions of the vertical poles;

[0014] S07: Arrange temporary roof steel structure support;

[0015] S08: Setting up scaffolding;

[0016] S09: Assembling the assembly units of the prefabricated roof steel structure components on the ground at the construction site;

[0017] S10: According to the installation area divided in S01, the roof steel structure is installed in different areas at the same time, and the assembled units are hoisted on the scaffolding to the installation height;

[0018] S11: Assembling the assembling units;

[0019] S12: patching the assembled assembly units with loose parts;

[0020] S13: Acceptance and inspection shall be carried out after all prefabricated roof steel structure components are fixed.

[0021] On the basis of the above technical solution, the method for hoisting a large-span roof steel structure of the present invention can also be improved as follows:

[0022] The specific steps of assembling the assembling units in S11 are as follows:

[0023] Step 1: hoist the assembly unit to the first fixing point and then install and fix it. The first fixing point is a starting position for locating and installing the assembly unit and is used as a reference point for subsequent installation of the assembly unit.

[0024] Step 2: a detachable splicing guide mechanism is provided next to the assembling unit at the first fixing point, i.e., the first assembling unit;

[0025] Step 3: Put a detachable rope buckle on the control point of the next assembling unit that needs to be connected to the assembling unit on the first fixed point, that is, the second assembling unit;

[0026] Step 4: hoisting the second assembly unit to a position close to the first fixing point;

[0027] Step 5: Use the splicing guide mechanism to guide the second assembly unit to move to the installation connection point of the first assembly unit;

[0028] Step 6: Remove the splicing guide mechanism next to the first assembling unit and the rope buckle at the control point of the second assembling unit, and assemble the first assembling unit and the second assembling unit together;

[0029] Step 7: Repeat steps 2 to 6 to complete the assembly of the remaining assembly units in sequence until the roof steel structure construction in the installation area is completed.

[0030] Furthermore, the splicing guide mechanism includes a guide hook, a limiting sleeve, a pulling wire, a handle and a take-up reel. The guide hook is connected to the front end of the spring. The spring is a high-density spring. A limiting rod is provided inside the spring. The front end of the limiting rod is fixedly connected to the front end of the spring, and the rear end of the limiting rod is fixedly connected to the pulling wire. The pulling wire passes through the handle and is connected to the take-up reel. The take-up reel is used to shorten the pulling wire. The bottom of the take-up reel is a base for fixing. A steering shaft is provided at the connection between the take-up reel and the base.

[0031] The beneficial effect of adopting the above-mentioned improvement scheme is: by using the splicing guide mechanism to hook the next assembly unit hoisted at the installation height next to the already installed assembly unit, the next assembly unit can be conveniently guided to the position where it needs to be installed, and at the same time, the next assembly unit can be prevented from shaking in the air, thereby improving the efficiency of installation construction.

[0032] Furthermore, the spring outer sleeve is provided with a limiting sleeve, the length of which is less than the maximum length to which the spring can be extended, and is greater than the length of the spring itself when under force.

[0033] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the limit rod enables the spring to maintain a straight shape, and when the assembly unit swings in the air toward the installation and construction direction, it can support the assembly unit to avoid damage to the assembly unit and the construction point; when the assembly unit swings in the air away from the installation and construction direction, the limit sleeve can limit the excessive extension of the spring and reduce the swing amplitude of the assembly unit.

[0034] Furthermore, the handle is a retractable structure, and the handle can be opened and detached from the pulling wire.

[0035] The beneficial effect of adopting the above-mentioned improvement scheme is: by setting a retractable and openable handle, when the pulling wire is shortened to the minimum length in front of the handle, the handle can be removed and the wire reel can be used to shorten the pulling wire, and the assembly unit can be moved closer to the installation point.

[0036] The specific method for dividing the installation area of ​​the assembly units of the roof steel structure prefabricated parts using the BIM software in S01 is as follows:

[0037] Step 1: Create a 3D model of the roof steel structure in BIM software and mark the location, specifications, and material information of each component;

[0038] Step 2: Define the boundaries of each working area of ​​the roof steel structure according to the construction plan in the BIM software;

[0039] Step 3: Determine all the elements and constructions of the roof steel structure from the BIM model and assign them to different BIM model work packages;

[0040] Step 4: Determine the working time range of each stage of the roof steel structure construction according to the construction progress and allocate it to different BIM model work packages;

[0041] Step 5: Arrange the time period for the construction sequence of the BIM model work package according to the construction requirements;

[0042] Step 6: Simulate the connection sequence of the BIM model work packages, adjust the simulated connections that have problems, and obtain a safe installation package construction sequence;

[0043] Step 7: Match the required tools and mechanical equipment according to the work sequence of the BIM model work package;

[0044] Step 8: Simulate the construction progress of tools and machinery to predict and adjust the construction plan.

[0045] The scaffolding erected in S09 is a "Mantanghong" scaffolding.

[0046] Furthermore, the specific method of setting up the scaffolding in S09 is:

[0047] Step 1: Set up the scaffolding foundation according to the roof steel structure construction plan layout to ensure that the scaffolding support is strong and stable;

[0048] Step 2: Use the vertical pole to install it at the base of the scaffolding and connect it to the foundation;

[0049] Step 3: Install crossbars and support rods between the vertical poles to form a support structure;

[0050] Step 4: Build the first horizontal bar in the distance between the cross bar and the support bar;

[0051] Step 5: Build the first step of longitudinal horizontal bar in the distance between the cross bar and the support bar;

[0052] Step 6: Set up the wall connecting rod;

[0053] Step 7: Repeat steps 3 to 5 until all scaffolding is erected.

[0054] The step S04 of numbering the prefabricated steel structure parts according to the layout drawing and the parts sketch specifically includes: first inspecting the prefabricated steel structure parts to be numbered, and ensuring that the prefabricated steel structure parts meet the requirements of being straight and undamaged; otherwise, correcting or replacing the prefabricated steel structure parts that do not meet the requirements; and marking the prefabricated steel structure parts to indicate the special line, center line and inspection control points.

[0055] The arrangement of the temporary roof steel structure support in S08 specifically includes the following steps:

[0056] Step 1: Determine the location of the temporary roof steel structure support according to the construction drawing;

[0057] Step 2: Install the foundation or foundation columns as the support base for the roof steel structure;

[0058] Step 3: Install the roof steel structure frame on the supporting foundation;

[0059] Step 4: Set up temporary beams on the supporting foundation;

[0060] Step 5: Install the sloped steel plate and waterproof layer on the roof steel structure frame.

[0061] Compared with the prior art, the large-span roof steel structure hoisting method provided by the present invention has the following advantages: by constructing the roof steel structure in a zoned installation manner, interference and misalignment of the roof steel structures are avoided, thereby greatly simplifying the construction process, improving installation efficiency, and facilitating quality control and supervision of the roof steel structure in each zone;

[0062] By dividing the prefabricated steel structure parts of the roof into assembly units, it is possible to avoid lifting all the prefabricated parts and assembling them in sequence at high altitude, which can effectively reduce the inconvenience of high altitude operations. It can also avoid the cost increase caused by lifting the entire roof steel structure to the designated location by a crane and the difficulty in controlling the entire roof steel structure. It can reduce on-site layout and make instrument operation more convenient and quick, while reducing project costs. The traditional high-altitude prefabricated part on-site assembly and overall suspended installation are combined and used, combining their respective advantages while avoiding their respective disadvantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0064] Figure 1The present invention provides a flow chart of a method for hoisting a large-span roof steel structure;

[0065] Figure 2 The present invention provides a schematic diagram of a splicing guide mechanism in a method for hoisting a large-span roof steel structure;

[0066] Figure 3 The present invention provides a cross-sectional schematic diagram of a splicing guide mechanism in a method for hoisting a large-span roof steel structure;

[0067] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0068] 01. Guide hook; 02. Spring; 021. Limit rod; 022. Limit sleeve; 03. Limit sleeve; 04. Pulling wire; 05. Handle; 06. Take-up reel; 07. Limit block. DETAILED DESCRIPTION

[0069] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0070] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0071] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0072] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0073] like Figure 1 FIG. 1 shows a first embodiment of a method for hoisting a large-span roof steel structure provided by the present invention. In this embodiment, the method includes the following steps:

[0074] S01: Use BIM software to divide the installation area of ​​the assembly unit of the roof steel structure prefabricated parts. The assembly unit is to reduce the number of high-altitude assembly operations and to control the size of the assembled roof steel structure prefabricated parts.

[0075] S02: Inspect and accept the prepared roof steel structure installation parts, and then perform sandblasting and primer maintenance after acceptance;

[0076] S03: Number the prefabricated steel structure parts of the roof according to the layout drawing and parts sketch;

[0077] S04: Transport the prefabricated roof steel structure components to the installation site;

[0078] S05: Divide the roof into installation order areas;

[0079] S06: Lay out the lines at the construction site according to the design dimensions, lay the pads, and mark the positions of the vertical poles;

[0080] S07: Arrange temporary roof steel structure support;

[0081] S08: Setting up scaffolding;

[0082] S09: Assemble the assembly units of the roof steel structure prefabricated parts on the ground at the construction site;

[0083] S10: According to the installation areas divided in S01, the roof steel structure is installed in different areas at the same time, and the assembled units are hoisted on the scaffolding to the installation height;

[0084] S11: Assembling the assembling units;

[0085] S12: patching the assembled assembly units with loose parts;

[0086] S13: Acceptance and inspection shall be carried out after all prefabricated roof steel structure components are fixed.

[0087] In S13, the assembling units may be assembled by welding or bolting;

[0088] All assembled units will experience welding deformation during the welding process. Preheating and welding processes are used to minimize this deformation. Secondly, after the assembled unit is welded and formed, the curved flanges of the assembled unit are corrected using an improved flange straightening machine. Similarly, the flange straightening machine's original working mode only allows for horizontal and linear straightening. To straighten the curved flanges, a custom bracket can be manufactured based on the curvature of the assembled unit.

[0089] Among them, in the above technical solution, the specific steps of assembling the assembly units in S11 are:

[0090] Step 1: Hoist the assembly unit to the first fixed point and install it. The first fixed point is the starting position for easy positioning and installation of the assembly unit and is used as a reference point for the installation of subsequent assembly units.

[0091] Step 2: a detachable splicing guide mechanism is provided next to the assembling unit at the first fixed point, i.e., the first assembling unit;

[0092] Step 3: Put a detachable rope buckle on the control point of the next assembly unit that needs to be connected to the assembly unit on the first fixed point, that is, the second assembly unit;

[0093] Step 4: Hoist the second assembly unit to a position close to the first fixed point;

[0094] Step 5: Use the splicing guide mechanism to guide the second assembly unit to move to the installation connection point of the first assembly unit;

[0095] Step 6: Remove the splicing guide mechanism next to the first assembly unit and the rope buckle at the control point of the second assembly unit, and assemble the first assembly unit and the second assembly unit together;

[0096] Step 7: Repeat steps 2 to 6 to complete the assembly of the remaining assembly units in sequence until the roof steel structure construction in the installation area is completed.

[0097] The installation order of the assembly units after the first fixing point can be from the middle to both sides, from left to right, or from right to left, as long as the installation order complies with the construction safety regulations and construction schedule.

[0098] The control points of the assembly unit are points that can control the shaking of the assembly unit in the moving direction of the assembly unit, such as the two ends of a large linear prefabricated part and the center of gravity of a circular prefabricated part.

[0099] like Figure 2-3As shown, further, in the above technical solution, the splicing guide mechanism includes a guide hook 01, a limiting sleeve 03, a pulling wire 04, a handle 05 and a take-up drum 06, the guide hook 01 is connected to the front end of the spring 02, the spring 02 is a high-density spring, and a limiting rod 021 is sleeved inside the spring 02, the front end of the limiting rod 021 is fixedly connected to the front end of the spring 02, and the rear end of the limiting rod 021 is fixedly connected to the pulling wire 04, and the pulling wire 04 passes through the handle 05 and is connected to the take-up drum 06, the take-up drum 06 is used to shorten the pulling wire 04, the bottom of the take-up drum 06 is a base for fixing, and a steering shaft is provided at the connection between the take-up drum 06 and the base.

[0100] The limiting rod 021 is smaller than the length of the spring 02 when it is under force. The front end of the handle 05 has a limiting block 07 for fixing the limiting rod 021. The limiting block 07 has a cavity in which the limiting rod 021 can slide. The bottom of the limiting block 07 has a through hole for the pulling wire 04 to pass through.

[0101] The take-up reel 06 can use the special-shaped wire take-up reel provided by Chinese Utility Model Patent Publication No. CN211254760U. It comprises a frame with a central shaft mounted on it. One end of the central shaft is coaxially fixedly connected to a drive motor, and the end of the central shaft remote from the drive motor is coaxially fixedly connected to a take-up reel. The take-up reel is circumferentially provided with multiple traction shafts, which are arranged perpendicular to the take-up reel. The ends of the traction shafts remote from the take-up reel are rotatably connected to a lever, which is arranged parallel to the take-up reel. This utility model facilitates the removal of the wire coil from the traction shaft by rotating the lever.

[0102] Furthermore, in the above technical solution, a limiting sleeve 022 is provided outside the spring 02, and the length of the limiting sleeve 022 is less than the maximum length that the spring 02 can extend, and is greater than the length of the spring 02 itself when it is under force.

[0103] Furthermore, in the above technical solution, the handle 05 is a retractable structure, and the handle 05 can be opened and detached from the pulling wire 04.

[0104] When in use, first install the splicing guide mechanism next to the first assembly unit and close to the splicing point. The installation method can be a bolt connection or a snap connection. Then hoist the second assembly unit near the first assembly unit, extend the handle 05, make the guide hook 01 hook the rope buckle of the second assembly unit, shorten the handle 05, and use the take-up drum 06 to reel the pulling wire 04 back to the reel 06 at the same time. The length of the pulling wire 04 outside the take-up drum 06 becomes shorter, and the second assembly unit is pulled close to the first assembly unit. When the pulling wire 04 cannot be further retracted back to the reel 06 due to the length of the handle 05 itself, remove the handle 05, and then continue to use the take-up drum 06 to shorten the pulling wire 04 until the second assembly unit is aligned with the docking installation point of the first assembly unit, remove the rope buckle on the second assembly unit, connect the first assembly unit and the second assembly unit, repeat the above steps to complete the installation construction of the roof steel structure in this area.

[0105] Among them, in the above technical solution, the specific method of dividing the installation area of ​​the assembly unit of the roof steel structure prefabricated parts using BIM software in S01 is:

[0106] Step 1: Create a 3D model of the roof steel structure in BIM software and mark the location, specifications, and material information of each component;

[0107] Step 2: Define the boundaries of each working area of ​​the roof steel structure according to the construction plan in the BIM software;

[0108] Step 3: Determine all the elements and constructions of the roof steel structure from the BIM model and assign them to different BIM model work packages;

[0109] Step 4: Determine the working time range of each stage of the roof steel structure construction according to the construction progress and allocate it to different BIM model work packages;

[0110] Step 5: Arrange the time period for the construction sequence of the BIM model work package according to the construction requirements;

[0111] Step 6: Simulate the connection sequence of the BIM model work packages, adjust the simulated connections that have problems, and obtain a safe installation package construction sequence;

[0112] Step 7: Match the required tools and mechanical equipment according to the work sequence of the BIM model work package;

[0113] Step 8: Simulate the construction progress of tools and machinery to predict and adjust the construction plan.

[0114] Among them, in the above technical solution, the scaffolding erected in S09 is the Mantanghong scaffolding.

[0115] Furthermore, in the above technical solution, the specific method of setting up the scaffolding in S09 is:

[0116] Step 1: Set up the scaffolding foundation according to the roof steel structure construction plan layout to ensure that the scaffolding support is strong and stable;

[0117] Step 2: Use the vertical pole to install it at the base of the scaffolding and connect it to the foundation;

[0118] Step 3: Install crossbars and support rods between the vertical poles to form a support structure;

[0119] Step 4: Build the first horizontal bar in the distance between the cross bar and the support bar;

[0120] Step 5: Build the first step of longitudinal horizontal bar in the distance between the cross bar and the support bar;

[0121] Step 6: Set up the wall connecting rod;

[0122] Step 7: Repeat steps 3 to 5 until all scaffolding is erected.

[0123] Among them, the scaffolding foundation can be fixed with materials such as scaffolding steel pipes to prevent the scaffolding from tilting and sliding;

[0124] The key horizontal rods must be made of thickened steel pipes, and the support rods must be firmly connected to the scaffolding poles, without any tilt or shaking of the rods;

[0125] After completing steps one to seven, the installation and reinforcement of other components, such as platform panels and railings, must follow the prescribed design and installation procedures to install each component and ensure safety and suitability for high-altitude construction needs.

[0126] Among them, in the above technical solution, numbering the roof steel structure prefabricated parts according to the layout drawing and the parts sketch in S04 specifically includes: first checking the roof steel structure prefabricated parts to be numbered, and ensuring that the roof steel structure prefabricated parts meet the requirements of being straight and undamaged, otherwise correcting or replacing the roof steel structure prefabricated parts that do not meet the requirements; when numbering the roof steel structure prefabricated parts, marking them with lines to indicate the special lines, center lines and inspection control points.

[0127] In construction, "material numbers" usually refer to a list of building materials issued or a record of material usage. These materials include steel bars, pipes, wire rods, cement, and other building materials.

[0128] During the construction process, to ensure the quality of materials used, each material is typically numbered. A distribution record sheet contains the number, material name, specification, batch number, origin, and quantity distributed. Construction contractors collect materials as needed, record the quantity collected on the material number sheet, and maintain traceability to ensure the accuracy and completeness of material usage. The material number sheet also serves as a reference for supervisors and owners to verify construction materials and confirm material consumption.

[0129] Among them, in the above technical solution, arranging the temporary roof steel structure support in S08 specifically includes the following steps:

[0130] Step 1: Determine the location of the temporary roof steel structure support according to the construction drawing;

[0131] Step 2: Install the foundation or foundation columns as the support base for the roof steel structure;

[0132] Step 3: Install the roof steel structure frame on the supporting foundation;

[0133] Step 4: Set up temporary beams on the supporting foundation;

[0134] Step 5: Install the sloped steel plate and waterproof layer on the roof steel structure frame.

[0135] When installing the roof steel structure frame on the supporting foundation, it is necessary to pay attention to the verticality and horizontality of the frame, which can be ensured by measuring with a level and a plumb line.

[0136] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A method for hoisting a large-span roof steel structure, characterized in that: The following steps are involved: S01: Using BIM software to divide the installation area of ​​the assembly units of the roof steel structure prefabricated parts, wherein the assembly units are the roof steel structure prefabricated parts that can be assembled in a controlled manner after reducing the number of high-altitude assembly operations; S02: Inspect and accept the prepared roof steel structure installation parts, and then perform sandblasting and primer maintenance after acceptance; S03: Number the prefabricated steel structure parts of the roof according to the layout drawing and parts sketch; S04: Transport the prefabricated roof steel structure components to the installation site; S05: Divide the roof into installation order areas; S06: Lay out the lines at the construction site according to the design dimensions, lay the pads, and mark the positions of the vertical poles; S07: Arrange temporary roof steel structure support; S08: Setting up scaffolding; S09: Assembling the assembly units of the prefabricated roof steel structure components on the ground at the construction site; S10: According to the installation area divided in S01, the roof steel structure is installed in different areas at the same time, and the assembled units are hoisted on the scaffolding to the installation height; S11: Assembling the assembling units; S12: patching the assembled assembly units with loose parts; S13: Acceptance and inspection are carried out after all prefabricated roof steel structure parts are fixed; The specific steps of assembling the assembling units in S11 are as follows: Step 1: hoist the assembly unit to the first fixing point and then install and fix it. The first fixing point is a starting position for locating and installing the assembly unit and is used as a reference point for subsequent installation of the assembly unit. Step 2: a detachable splicing guide mechanism is provided next to the assembling unit at the first fixing point, i.e., the first assembling unit; Step 3: Put a detachable rope buckle on the control point of the next assembling unit that needs to be connected to the assembling unit on the first fixed point, that is, the second assembling unit; Step 4: hoisting the second assembly unit to a position close to the first fixing point; Step 5: Use the splicing guide mechanism to guide the second assembly unit to move to the installation connection point of the first assembly unit; Step 6: Remove the splicing guide mechanism next to the first assembling unit and the rope buckle at the control point of the second assembling unit, and assemble the first assembling unit and the second assembling unit together; Step 7: Repeat steps 2 to 6 to complete the assembly of the remaining assembly units in sequence until the roof steel structure construction in the installation area is completed; The splicing guide mechanism comprises a guide hook (01), a limiting sleeve (022), a pulling steel wire (04), a handle (05) and a take-up drum (06), wherein the guide hook (01) is connected to the front end of the spring (02), the spring (02) is a high-density spring, a limiting rod (021) is provided inside the spring (02), the front end of the limiting rod (021) is fixedly connected to the front end of the spring (02), the rear end of the limiting rod (021) is fixedly connected to the pulling steel wire (04), the pulling steel wire (04) passes through the handle (05) and is connected to the take-up drum (06), the take-up drum (06) is used to shorten the pulling steel wire (04), the bottom of the take-up drum (06) is a base for fixing, and a steering shaft is provided at the connection between the take-up drum (06) and the base; The outer sleeve of the spring (02) is provided with a limiting sleeve (022), and the length of the limiting sleeve (022) is less than the maximum length that the spring (02) can extend, and is greater than the length of the spring (02) itself when it is under force.

2. A method for hoisting a large-span roof steel structure according to claim 1, characterized in that: The handle (05) is a retractable structure, and the handle (05) can be opened and detached from the pulling wire (04).

3. The method for hoisting a large-span roof steel structure according to claim 1, characterized in that: The specific method for dividing the installation area of ​​the assembly units of the roof steel structure prefabricated parts using BIM software in S01 is: Step 1: Create a 3D model of the roof steel structure in BIM software and mark the location, specifications, and material information of each component; Step 2: Define the boundaries of each working area of ​​the roof steel structure according to the construction plan in the BIM software; Step 3: Determine all the elements and constructions of the roof steel structure from the BIM model and assign them to different BIM model work packages; Step 4: Determine the working time range of each stage of the roof steel structure construction according to the construction progress and allocate it to different BIM model work packages; Step 5: Arrange the time period for the construction sequence of the BIM model work package according to the construction requirements; Step 6: Simulate the connection sequence of the BIM model work packages, adjust the simulated connections that have problems, and obtain a safe installation package construction sequence; Step 7: Match the required tools and mechanical equipment according to the work sequence of the BIM model work package; Step 8: Simulate the construction progress of tools and machinery to predict and adjust the construction plan.

4. The method for hoisting a large-span roof steel structure according to claim 1, characterized in that: The scaffolding erected in S09 is a Mantanghong scaffolding.

5. A method for hoisting a large-span roof steel structure according to claim 4, characterized in that: The specific method of setting up the scaffold in S09 is: Step 1: Set up the scaffolding foundation according to the roof steel structure construction plan layout to ensure that the scaffolding support is strong and stable; Step 2: Use the vertical pole to install it at the base of the scaffolding and connect it to the foundation; Step 3: Install crossbars and support rods between the vertical poles to form a support structure; Step 4: Build the first horizontal bar in the distance between the cross bar and the support bar; Step 5: Build the first step of longitudinal horizontal bar in the distance between the cross bar and the support bar; Step 6: Set up the wall connecting rod; Step 7: Repeat steps 3 to 5 until all scaffolding is erected.

6. The method for hoisting a large-span roof steel structure according to claim 1, characterized in that: The numbering of the roof steel structure prefabricated parts according to the layout drawing and the parts sketch in S04 specifically includes: first inspecting the roof steel structure prefabricated parts to be numbered, and ensuring that the roof steel structure prefabricated parts meet the requirements of being straight and undamaged, otherwise correcting or replacing the roof steel structure prefabricated parts that do not meet the requirements; and marking the roof steel structure prefabricated parts to indicate the special line, center line and inspection control points when numbering the roof steel structure prefabricated parts.

7. The method for hoisting a large-span roof steel structure according to claim 1, characterized in that: Arranging the temporary roof steel structure support in S08 specifically includes the following steps: Step 1: Determine the location of the temporary roof steel structure support according to the construction drawing; Step 2: Install the foundation or foundation columns as the support base for the roof steel structure; Step 3: Install the roof steel structure frame on the supporting foundation; Step 4: Set up temporary beams on the supporting foundation; Step 5: Install the sloped steel plate and waterproof layer on the roof steel structure frame.

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