A high-altitude cumulative sliding construction method of steel grid based on BIM technology

Abstract

A steel grid high-altitude cumulative sliding construction method based on BIM technology of the present invention relates to the field of steel grid high-altitude construction technology, and includes the following implementation steps: step 1, establishing a BIM model; step 1.1, using BIM software to create a three-dimensional information model of the steel grid according to the design drawings of the steel grid; step 1.2, deepening the design of the steel grid, and using the visualization and parameterization functions of the BIM model to check the collision problems in the steel grid design; step 2, construction simulation and analysis; step 3: sliding track installation; step 4: grid assembly and sliding preparation; step 5: steel grid high-altitude cumulative sliding; step 6: construction monitoring and acceptance. The present invention accurately simulates, analyzes and optimizes the entire process of steel grid high-altitude cumulative sliding construction through BIM technology, thereby achieving the improvement of construction accuracy, the improvement of construction efficiency and the effective reduction of construction safety risks.

Description

Technical Field

[0001] The invention relates to the technical field of high-altitude construction of steel grids, and in particular to a high-altitude cumulative sliding construction method of steel grids based on BIM technology. Background Art

[0002] The space grid structure is a kind of space grid structure. The so-called "space structure" is relative to the "plane structure". It has the characteristics of three-dimensional action. The space structure can also be regarded as the extension and deepening of the plane structure. Since the advent of the space structure, it has been welcomed by people for its efficient force performance, novel and beautiful form and fast and convenient construction. In stadiums, exhibition centers, cultural facilities, transportation hubs and even industrial plants that require large spans and large spaces, space structures can be seen everywhere. Traditional steel grid construction methods such as high-altitude bulk method and integral hoisting method have many limitations. The high-altitude bulk method has a long construction period, high safety risks and extremely high skills requirements for high-altitude workers; the integral hoisting method requires large lifting equipment, high equipment rental and operation costs, and is greatly restricted by site conditions. Although the high-altitude cumulative sliding method has overcome some of the above problems to a certain extent, it still faces challenges such as difficult control of sliding track installation accuracy, complex deformation monitoring and control during the sliding process of the steel grid, and difficulty in coordinating construction progress and resource allocation during the construction process. With the development of Building Information Modeling (BIM) technology, it has shown great advantages in the fields of architectural design, construction management, etc.

[0003] However, the current method of deeply applying BIM technology to the construction of high-altitude cumulative sliding of steel grids is not perfect enough, and it is difficult to give full play to the synergistic effect of the two. Summary of the invention

[0004] The purpose of the present invention is to provide a steel grid high-altitude cumulative sliding construction method based on BIM technology.

[0005] To achieve the above object, the present invention adopts the following technical solution: a steel grid high-altitude cumulative sliding construction method based on BIM technology, comprising the following implementation steps:

[0006] Step 1: Create a BIM model:

[0007] Step 1.1: Create a three-dimensional information model of the steel grid using BIM software according to the design drawings of the steel grid;

[0008] Step 1.2: Conduct in-depth design of the steel grid and use the visualization and parameterization functions of the BIM model to check for collision problems in the steel grid design;

[0009] Step 2: Construction simulation and analysis:

[0010] Step 2.1, simulate the high-altitude cumulative sliding construction process of the steel grid in the BIM model, set the installation position, slope, and flatness parameters of the sliding track, simulate the movement of the sliding device on the track, and the stress and deformation of the steel grid at different sliding stages;

[0011] Step 2.2, based on the simulation results, optimize the construction plan;

[0012] Step 3: Sliding track installation:

[0013] Step 3.1: According to the installation position and parameter information of the sliding track provided by the BIM model, accurate positioning is performed at the construction site;

[0014] Step 3.2: Install the sliding track, use the BIM model for comparison and guidance in real time, check the installation quality of the track, and make corrections in time according to the adjustment plan provided by the BIM model;

[0015] Step 4: Grid assembly and sliding preparation: According to the steel grid assembly plan in the BIM model, assemble the steel grid in blocks or sections;

[0016] Install the sliding device on the assembled steel grid blocks or segments. The installation position and direction of the sliding device shall be carried out in accordance with the requirements of the BIM model;

[0017] Step 5: High-altitude cumulative sliding of the steel grid: Start the traction equipment and start the high-altitude cumulative sliding of the steel grid according to the sliding speed and sliding sequence optimized by BIM model simulation;

[0018] Step 6: Construction monitoring and acceptance:

[0019] Step 6.1: The measurement data of the construction site is transmitted to the BIM model in real time for visual display and analysis;

[0020] Step 6.2: Use the BIM model to monitor and manage safety risks during the construction process;

[0021] Step 6.3: After the grid sliding construction is completed, the final installation position, geometric shape and structural integrity of the steel grid are comprehensively inspected and accepted in combination with the BIM model.

[0022] Preferably, in step 1, BIM is established by using either Revit or TeklaStructures;

[0023] The BIM model is used to construct the rods, nodes, and supports of the steel grid and define the data information of the geometric dimensions, material properties, and mechanical properties of each component;

[0024] The BIM model is also used to construct sliding tracks, sliding devices, traction equipment and related structural parts of the building, so that the entire construction scene can be presented in the model.

[0025] Preferably, step 2.1 is used to predict possible construction problems, wherein the construction problems include local stress concentration of the steel grid and the jamming phenomenon during the sliding process, and solutions are formulated by predicting the possible construction problems;

[0026] The optimization contents of step 2.2 include sliding sequence, sliding speed, setting of traction points, and arrangement of temporary supports.

[0027] Preferably, the step 3.1 uses high-precision measuring instruments, including a total station and a level, to ensure that the installation position deviation of the sliding track is less than or equal to ±3 mm.

[0028] Preferably, the track in step 3.2 is made of round steel, steel plate, angle steel, channel steel, rail, and I-beam, and the tracks are connected by welding and high-strength bolts;

[0029] The installation deviation range is:

[0030] The straightness deviation of the track is less than or equal to ±5mm;

[0031] The flatness deviation of the track top surface is less than or equal to ±2mm.

[0032] Preferably, in step 4, the dimension information in the BIM model is used for on-site verification to ensure that the geometric shape and size of the steel grid blocks or segments after assembly are consistent with the design requirements and the error is controlled within ±10 mm.

[0033] Preferably, the speed of the structure during sliding is less than or equal to 1 m / min, and a pulley block is used for speed change;

[0034] The pulley contact area shall not be less than 70% of the roller surface area.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] The present invention uses BIM technology to simulate construction in advance, and since the steel grid structure is carried out after the main structure of the civil engineering is completed, and the main structure is overhead, it has no impact on the internal construction of the building, and can be carried out in parallel with the lower civil engineering construction, thus speeding up the construction period;

[0037] Furthermore, the high-altitude sliding method does not require high lifting equipment and traction equipment, and a small crane or winch can be used, and only a local assembly bracket needs to be set up. If there is a platform available at the end of the building, the assembly bracket may not be set up;

[0038] The present invention uses BIM technology to accurately simulate, analyze and optimize the entire process of high-altitude cumulative sliding construction of steel grids, thereby improving construction accuracy, improving construction efficiency and effectively reducing construction safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] In the attached figure:

[0041] Figure 1 This is a schematic diagram of the state in which the BIM simulation grid steel ball is placed on the temporary channel steel in this embodiment;

[0042] Figure 2 This is a schematic diagram of the lower chord-ball connection of the BIM simulation grid in this embodiment;

[0043] Figure 3 This is a schematic diagram of the connection between the web members and the upper chord ball of the BIM simulation grid in this embodiment;

[0044] Figure 4 This is a schematic diagram of the connection of the upper chord of the BIM simulation grid in this embodiment. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0046] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0047] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The present invention provides a high-altitude cumulative sliding construction method for steel grids based on BIM technology, step 1, establishing a BIM model: step 1.1, according to the design drawings of the steel grid, using BIM software to create a three-dimensional information model of the steel grid; specifically, accurately construct the rods, nodes, supports and other components of the steel grid in the model, and define the geometric dimensions, material properties, mechanical properties and other information of each component in detail. For example, for the rods of the steel grid, accurately set their cross-sectional shapes: circular, square, etc., dimensions: diameter, side length, etc., length and material, and assign them corresponding mechanical parameters such as elastic modulus and yield strength; in this embodiment, on site, the roof on one side of the steel grid installation part (opposite to the sliding part) is to be built with steel and channel steel to set up a grid installation platform, the spacing between the steel sections is not more than 2000mm, and the top elevation of the steel section height is the bottom elevation of the steel grid.

[0051] Step 1.2: Conduct in-depth design of the steel grid, and use the visualization and parameterization functions of the BIM model to check for collision problems in the steel grid design; adjust the design of the steel grid in a timely manner for the collision problems found, optimize the arrangement and connection methods of the rods, and ensure the constructability and structural rationality of the steel grid. For example, through the collision detection function of the BIM model, it was found that two rods overlapped in space. According to the analysis results, the connection node position of one of the rods was fine-tuned to avoid collisions, while ensuring that the overall mechanical properties of the steel grid were not affected;

[0052] In step 1, BIM is established by using any of Revit or TeklaStructures; the BIM model is used to construct the rods, nodes, and supports of the steel grid and define the data information of the geometric dimensions, material properties, and mechanical properties of each component; the BIM model is also used to construct the sliding track, sliding device, traction equipment, and related structural parts of the building, so that the entire construction scene can be presented in the model;

[0053] Step 2, construction simulation and analysis: Step 2.1, simulate the high-altitude cumulative sliding construction process of the steel grid in the BIM model, set the installation position, slope, and flatness parameters of the sliding track, simulate the movement of the sliding device on the track, and the stress and deformation of the steel grid at different sliding stages; this step is used to predict possible construction problems, including local stress concentration of the steel grid and the jamming phenomenon during the sliding process, and formulate solutions by predicting possible construction problems; for example, according to the actual construction plan, set the horizontal deviation of the sliding track to ±5mm in the BIM model to simulate the stress change of each rod and the deformation trend of the entire steel grid as the sliding process progresses under the action of the deadweight and construction load of the steel grid; the joints of the slide rail must be padded and smooth. When sliding, lubricating oil should also be applied to the slide rail, and the front and rear of the slide should be made into arc chamfers, otherwise it is easy to cause "track jamming". Step 2.2, based on the simulation results, the construction plan is optimized, including the sliding sequence, sliding speed, setting of traction points, and arrangement of temporary supports; for example, through simulation, it is found that the originally planned sliding sequence may cause a large deformation of the steel grid at a certain stage, and the sliding sequence is adjusted according to the analysis results to control the deformation of the steel grid within the allowable range; or according to the uneven force of the traction points found in the simulation, the position and number of the traction points are re-optimized to ensure that the steel grid is evenly and stably stressed during the sliding process;

[0054] Step 3: Sliding track installation: Step 3.1. According to the installation position and parameter information of the sliding track provided by the BIM model, accurate positioning is carried out at the construction site. High-precision measuring instruments are used for positioning. The measuring instruments include total stations and levels to ensure that the installation position deviation of the sliding track is less than or equal to ±3mm. For example, the measurement accuracy of the total station can reach ±1mm. It is used to accurately mark the center line and installation height line of the sliding track on the building structure to provide an accurate benchmark for track installation; Step 3.2. Install the sliding track and use the BIM model for comparison and guidance in real time to check the installation quality of the track and make timely adjustments based on the actual situation. According to the adjustment plan provided by the BIM model, the track is made of round steel, steel plate, angle steel, channel steel, rail, and I-beam, and the connection between the tracks is welded and connected with high-strength bolts; the installation deviation range is: the straightness deviation of the track is less than or equal to ±5mm; the flatness deviation of the top surface of the track is less than or equal to ±2mm; if it is found that the installation deviation exceeds the allowable range, it is corrected in time according to the adjustment plan provided by the BIM model; for example, when the track straightness deviation is large, the deviation position and adjustment amount are determined according to the BIM model analysis, and tools such as jacks or hand winches are used to fine-tune the track to meet the construction requirements.

[0055] Step 4: Grid assembly and sliding preparation: Assemble the steel grid in blocks or sections according to the steel grid assembly plan in the BIM model; during the assembly process, strictly control the installation accuracy of each rod and node, and use the dimension information in the BIM model for on-site verification to ensure that the geometric shape and size of the assembled steel grid blocks or sections are consistent with the design requirements, and the error is controlled within ±10mm. For example, for the node coordinates of the steel grid, obtain accurate three-dimensional coordinate values ​​through the BIM model, and use measuring instruments to locate during ground assembly to ensure the accuracy of the node position. Install the sliding device on the assembled steel grid block or section, and the installation position and direction of the sliding device shall be carried out in accordance with the requirements of the BIM model; use the dimension information in the BIM model for on-site verification to ensure that the geometric shape and size of the assembled steel grid blocks or sections are consistent with the design requirements, and the error is controlled within ±10mm;

[0056] The assembly of the grid in this embodiment is specifically as follows: before the formal on-site assembly of the steel grid, first, all grid installation sequences and operation processes are pre-assembled using BIM simulation construction technology. During the BIM simulation assembly process, it is necessary to review in advance whether the bolt balls, rod specifications, dimensions, theoretical lengths, cutting lengths and other design drawings in the grid construction drawings are accurate.

[0057] Strictly control the installation reference axis position, elevation and verticality deviation. If it does not meet the requirements of the design drawings, correct it in time and pay attention to the following points:

[0058] ① When installing the grid, check the building's positioning axis (i.e., reference axis), support axis, support surface elevation, and embedded bolt positions, make records, and go through the handover and acceptance procedures.

[0059] ② During the installation of the grid, the grid support axis, the support surface elevation or the grid lower chord elevation, and the grid ridge line should be tracked and controlled. If errors are found to be accumulated, they should be corrected in time.

[0060] ③ When using mesh and small units for assembly, the positioning lines and verticality of the mesh and small units must be strictly controlled.

[0061] ④ When each member is connected to the node, the center lines should converge at one point, and the bolt ball and welding ball should converge at the center of the sphere.

[0062] ⑤ Start assembling the grid. Before assembly, you must first determine the axis position of the lower chord ball joint according to the drawing, and temporarily support the steel ball on the channel steel.

[0063] During the assembly process, the lower chord steel balls on both sides of the steel grid should be supported on the channel steel. The grid assembly starts from the middle and moves to both sides. After the position of the lower chord ball connection point is determined, the center of the grid is used as the standard. Then, according to the construction drawing, after checking the ball, rod specifications and rod dimensions, the lower chord assembly begins. The accuracy of the steel ball position must be ensured during assembly to avoid unnecessary rework. When the lower chord ball is placed in position, use a level and theodolite to measure the elevation and axis of the four lower chord steel balls when assembling the first square, so that each ball connection point is consistent with the drawing. After measuring the diagonal line correctly, the four lower chord rods are supported and connected, and then the upper chord ball of this cone is assembled with the two belly rods. The assembly of the first unit vertebral body is completed.

[0064] After the first unit cone is assembled and fastened, the diagonal, cone height, axis and elevation of the cone are measured. After all meet the requirements of the specification, the next process is carried out. Taking the first cone as the standard, the upper chord is assembled into a square grid and the lower chord is assembled into 4 square grids to ensure the stability of the grid structure.

[0065] Then measure the diagonal, cone height, axis and elevation. When all meet the requirements of the specification, spread to both sides of the long direction to assemble into the sliding first unit grid. During assembly, measure the axis position and elevation of the lower chord ball frequently and make a record. Until the long grid is assembled. During the assembly process, check the axis offset and longitudinal and transverse length deviation frequently. The on-site grid assembly is completed by a team, and the assembly is as symmetrical as possible.

[0066] Step 5: High-altitude cumulative sliding of the steel grid: Start the traction equipment, and start the high-altitude cumulative sliding of the steel grid according to the sliding speed and sliding sequence optimized by the BIM model simulation; during the sliding process, use total stations, displacement sensors and other measuring equipment to monitor the displacement and deformation of the steel grid in real time, and compare and analyze the monitoring data with the simulation data in the BIM model. For example, collect the displacement data of the key points of the steel grid every 1m of sliding or every certain time (such as 5 minutes). If it is found that the deviation between the actual displacement data and the simulation data exceeds ±10mm, stop the sliding immediately, and find the cause according to the analysis results of the BIM model, such as whether there is local unevenness of the sliding track, stuck sliding device and other problems, and take corresponding solutions in time, such as trimming the track, cleaning the sliding device, etc. When the structure slides, the speed is less than or equal to 1m / min, and the pulley group is used for speed change, and the pulley contact area is not less than 70% of the roller surface area;

[0067] In this embodiment, after the assembly of the unit steel grid frame in step 4, the assembly of all grid frames on the ground is completed. According to the specifications, size and weight of the grid frame, suitable traction equipment such as winch, electric island chain, etc. is selected through theoretical calculation. The shift point (grid lower chord ball node) is tied with a steel wire rope with a diameter of 25, and the other end is tied to a 10-ton fall chain. The 10-ton fall chain should be suspended on the round steel welded with 20 on the original concrete embedded parts of the symmetrical axis on both sides of the steel grid frame. The round steel is made into a ring with a diameter of 100 and the two ends are welded to the embedded parts. After the first unit steel grid frame is slid, according to the above-mentioned construction process, the second unit steel grid frame is continued to be assembled. The second unit steel grid frame is fully assembled, and the second unit is slid after acceptance. After the second unit steel grid frame is slid, according to the above-mentioned construction process, the third unit steel grid frame is continued to be assembled. The third unit steel grid frame is fully assembled, and the third unit is slid after acceptance. The whole assembly of the steel grid frame is realized by analogy.

[0068] This technology uses Q235B channel steel as support and slideway, and then assembles the steel grid on the platform. After the grid on the platform is assembled, the grid is slid. When sliding, the grid is divided into a starting frame and a bulk method to complete the sliding of the grid, and the cumulative sliding method is adopted. That is, first slide the strip unit for a distance (the width that can be connected to the second unit), and after the second unit is connected, the two strips slide together for a distance (the width is the same as above), and then connect the third strip, and the three strips slide together for a distance again, and the operation is repeated until the last unit is connected. By using welding connection, the steel grid and the main structure connection node are reliably connected, and through engineering testing, it is ensured that the connection quality meets the specification requirements, and the accuracy of the construction is also enhanced to achieve the effect required by the design.

[0069] Step 6: Construction monitoring and acceptance: Step 6.1. The measurement data of the construction site is transmitted to the BIM model in real time for visual display and analysis; the stress data of each member of the steel grid is transmitted to the BIM model through the sensor network, and the stress state of each member is displayed in different colors or values ​​in the model, which intuitively reflects the stress condition of the steel grid. When it is found that the stress of a member exceeds the design allowable value, the system automatically issues an early warning message and provides possible cause analysis and solution suggestions, such as whether it is necessary to add temporary support or adjust the sliding parameters. Step 6.2. Use the BIM model to monitor and manage safety risks during the construction process; identify dangerous areas in the construction in the model; such as: high-altitude operation areas, traction equipment operation areas and dangerous working conditions, such as: sliding operations in strong winds, etc., and formulate corresponding safety precautions. For example, when the wind speed exceeds the safety threshold set in the BIM model, the system automatically prompts to stop the sliding operation of the steel grid and reminds the construction personnel to take windproof measures, such as reinforcing the temporary support of the steel grid and putting away construction materials that are easily blown by the wind. Step 6.3: After the grid sliding construction is completed, the final installation position, geometric shape, and structural integrity of the steel grid are comprehensively inspected and accepted in combination with the BIM model; the actual construction results are compared with the design requirements in the BIM model to check whether the various indicators meet the acceptance criteria. For example, check whether the installation position deviation of the steel grid support is within ±5mm, whether the overall deformation of the steel grid is within the design allowable range, etc. For parts that do not meet the acceptance criteria, use the BIM model to trace the construction process, find the root cause of the problem, and formulate a rectification plan. After the rectification is completed, acceptance is carried out again until the construction quality of the steel grid fully meets the requirements.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-altitude cumulative sliding construction method of a steel grid based on BIM technology, characterized in that: The implementation steps include: Step 1: Create a BIM model: Step 1.1: Create a three-dimensional information model of the steel grid using BIM software according to the design drawings of the steel grid; Step 1.2: Conduct in-depth design of the steel grid and use the visualization and parameterization functions of the BIM model to check for collision problems in the steel grid design; Step 2: Construction simulation and analysis: Step 2.1, simulate the high-altitude cumulative sliding construction process of the steel grid in the BIM model, set the installation position, slope, and flatness parameters of the sliding track, simulate the movement of the sliding device on the track, and the stress and deformation of the steel grid at different sliding stages; Step 2.2, based on the simulation results, optimize the construction plan; Step 3: Sliding track installation: Step 3.1: According to the installation position and parameter information of the sliding track provided by the BIM model, accurate positioning is performed at the construction site; Step 3.2: Install the sliding track, use the BIM model for comparison and guidance in real time, check the installation quality of the track, and make corrections in time according to the adjustment plan provided by the BIM model; Step 4: Grid assembly and sliding preparation: According to the steel grid assembly plan in the BIM model, the steel grid is assembled in blocks or sections; Install the sliding device on the assembled steel grid blocks or segments. The installation position and direction of the sliding device shall be carried out in accordance with the requirements of the BIM model; Step 5: High-altitude cumulative sliding of the steel grid: Start the traction equipment and start the high-altitude cumulative sliding of the steel grid according to the sliding speed and sliding sequence optimized by BIM model simulation; Step 6: Construction monitoring and acceptance: Step 6.1: The measurement data of the construction site is transmitted to the BIM model in real time for visual display and analysis; Step 6.2: Use the BIM model to monitor and manage safety risks during the construction process; Step 6.3: After the grid sliding construction is completed, the final installation position, geometric shape and structural integrity of the steel grid are comprehensively inspected and accepted in combination with the BIM model.

2. According to the BIM technology-based steel grid high-altitude cumulative sliding construction method of claim 1, it is characterized by: In step 1, BIM is established by using either Revit or TeklaStructures; The BIM model is used to construct the rods, nodes, and supports of the steel grid and define the data information of the geometric dimensions, material properties, and mechanical properties of each component; The BIM model is also used to construct sliding tracks, sliding devices, traction equipment and related structural parts of the building, so that the entire construction scene can be presented in the model.

3. According to the BIM technology-based steel grid high-altitude cumulative sliding construction method of claim 1, it is characterized by: Step 2.1 is used to predict possible construction problems, including local stress concentration of steel grids and jamming during sliding. Solutions are formulated by predicting possible construction problems. The optimization contents of step 2.2 include sliding sequence, sliding speed, setting of traction points, and arrangement of temporary supports.

4. According to the BIM technology-based steel grid high-altitude cumulative sliding construction method of claim 1, it is characterized by: The step 3.1 uses high-precision measuring instruments, including a total station and a level, to ensure that the installation position deviation of the sliding track is less than or equal to ±3 mm.

5. According to the BIM technology-based steel grid high-altitude cumulative sliding construction method of claim 1, it is characterized by: The track in step 3.2 is made of round steel, steel plate, angle steel, channel steel, rail, and I-beam, and the tracks are connected by welding and high-strength bolts; The installation deviation range is: The straightness deviation of the track is less than or equal to ±5mm; The flatness deviation of the top surface of the track is less than or equal to ±2mm.

6. The method for high-altitude cumulative sliding construction of steel grids based on BIM technology according to claim 1 is characterized in that: In step 4, the dimension information in the BIM model is used for on-site verification to ensure that the geometric shape and size of the steel grid blocks or segments after assembly are consistent with the design requirements, and the error is controlled within ±10 mm.

7. The high-altitude cumulative sliding construction method of a steel grid based on BIM technology according to claim 1 is characterized by: When the structure is sliding, the speed is less than or equal to 1m / min, and the pulley block is used for speed change; The pulley contact area shall not be less than 70% of the roller surface area.

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