A super-high large-span roof steel truss oblique sliding construction method

Abstract

This invention provides a method for the oblique sliding construction of ultra-high, large-span roof steel trusses, belonging to the field of building construction technology. The method involves fixing a sliding track support frame between the ultra-high, large-span roof steel truss and its installation position; construction personnel constructing a three-dimensional model based on the structure and position of the sliding track support frame and the structure of the ultra-high, large-span roof steel truss to simulate the installation of the sliding track, and then fixing the sliding track to the sliding track support frame; the ultra-high, large-span roof steel truss being assembled in sections at the processing site and then hoisted to the assembly platform for final assembly; and finally, the assembled ultra-high, large-span roof steel truss sliding track being moved to the installation position of the ultra-high, large-span roof steel truss and fixed therein. This method solves the problems of long construction periods, low construction efficiency, and difficulty in ensuring construction quality associated with existing high-altitude assembly methods for ultra-high, large-span roof steel trusses.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and specifically relates to a method for the oblique sliding construction of ultra-high, large-span roof steel trusses. Background Technology

[0002] With the increasing number of stadiums and indoor amusement buildings with large spans and high spaces, complex steel structures and steel roof structures are emerging in large numbers. People are paying more and more attention to the key technologies involved in the installation and construction of complex large-span steel structures. The structural design of ultra-high, large-span roof steel trusses is a crucial part of the installation process. It involves detailed analysis and calculation of loads, stress distribution, overall structural stability, and wind resistance. By using computer-aided design software, engineers can simulate the structural behavior under different load conditions to ensure that the steel truss has sufficient strength and stability. Choosing appropriate materials is crucial to ensuring the stability and durability of ultra-high, large-span roof steel trusses. Common steel materials include carbon steel, alloy steel, and stainless steel; choosing suitable materials can effectively reduce the overall structural weight and improve wind resistance. The installation of ultra-high, large-span roof steel trusses requires advanced construction methods and technologies. This may involve the use of large lifting equipment, specialized welding techniques, and precise installation procedures. Furthermore, modern Building Information Modeling (BIM) technology can provide accurate structural information, helping construction personnel better understand and execute complex installation tasks. Safety is paramount during the installation of ultra-high, long-span roof steel trusses. Construction personnel must strictly adhere to relevant safety regulations and standards, and take necessary safety measures, including wearing personal protective equipment, ensuring safe passageways at the construction site, and using safe lifting equipment.

[0003] Most existing ultra-high, large-span roof steel trusses are constructed using high-altitude assembly methods, which result in long construction periods, low construction efficiency, difficulty in ensuring construction quality, and low safety due to high-altitude operations, making them prone to accidents. Summary of the Invention

[0004] In view of this, the present invention provides a method for the oblique sliding construction of ultra-high and large-span roof steel trusses, which can solve the problems that most existing ultra-high and large-span roof steel trusses are constructed by high-altitude assembly, which has a long construction period, low construction efficiency, difficulty in ensuring construction quality, and low safety and easy danger caused by high-altitude operations.

[0005] This invention is implemented as follows:

[0006] This invention provides a method for the oblique sliding construction of ultra-high, large-span roof steel trusses, comprising the following steps:

[0007] S10: Fixed sliding track support frame between the ultra-high and large-span roof steel truss and its installation position;

[0008] S20: Based on the structure and position of the sliding track support frame and the structure of the ultra-high and large-span roof steel truss, the construction personnel construct a three-dimensional model and simulate the installation of the sliding track;

[0009] S30: Adjust the height and position of the sliding track support frame according to the simulation results of the sliding track installation to ensure that the overall slope of the sliding track is between 3-5°, and fix the sliding track on the sliding track support frame;

[0010] S40: The ultra-high, large-span roof steel truss is assembled in sections at the processing site and then hoisted onto the assembly platform support for final assembly;

[0011] S50: Move the assembled ultra-high and large-span roof steel truss sliding track to the ultra-high and large-span roof steel truss installation position and fix it;

[0012] S60: The sliding track and the sliding track support frame are dismantled and unloaded to complete the oblique sliding of the ultra-high and large-span roof steel truss.

[0013] Based on the above technical solution, the method for oblique sliding construction of ultra-high, large-span roof steel trusses of the present invention can be further improved as follows:

[0014] The sliding track support frame includes support components, a conversion platform, and a lifting component. Two support components are respectively positioned laterally on the ultra-high, large-span roof steel truss and its installation location. The conversion platform is located at one end of each support component, used to adjust the angle of the sliding track. Reinforcing rods are installed inside each support component to reinforce it. The support component is an H-shaped steel frame, with the lifting component at its bottom, used to adjust the height of the support component and the angle between the two support components.

[0015] Furthermore, the lifting component includes a support base, a telescopic device, and a platform. The support base has a rectangular structure, with support columns at the four corners of the bottom. The telescopic device includes a telescopic rod and a first telescopic motor. The output shaft of the first telescopic motor is connected to the telescopic rod to provide power for the telescopic rod's extension and retraction. The platform is fixedly connected to the telescopic rod, and the top of the platform is fixedly connected to the support component.

[0016] Furthermore, the conversion platform includes an I-beam conversion platform, a lattice support frame, and a support steel platform. The I-beam conversion platform is fixed to the top of the support member. The I-beam conversion platform includes two steel frames, namely a first frame and a second frame. The second frame is disposed inside the first frame, and the four corners of the second frame abut against the center of the inner edge of the first frame. The first frame and the second frame are welded and fixed. The lattice support frame is fixed at the connection position between the first frame and the second frame. The top of the lattice support frame is provided with a support steel platform, which is used to provide support for the support steel platform. A sliding track is fixedly provided on the top of the support steel platform.

[0017] Furthermore, the sliding track includes a slide rail, slide rail fixing components, reinforcing components, and a track beam. The slide rail includes two steel frames, and a reinforcing component, which is an angle steel, is fixedly installed inside the slide rail to provide a fixed support structure between the slide rails. The track beam is fixed to the bottom of the slide rail, and its bottom is fixedly connected to the supporting steel platform. The slide rail fixing components include multiple components, which are respectively fixed on the slide rail to connect and fix the slide rail and the track beam.

[0018] Furthermore, the specific steps for assembling the ultra-high, large-span roof steel truss in sections at the processing site and then hoisting it onto the final assembly platform for final assembly include:

[0019] The first step is to fix the assembly jig and the jig ground layout line on the ground;

[0020] The second step is to install the chord segments onto the assembly jig and position them accordingly.

[0021] The third step is to assemble the web members and weld them to the chord members;

[0022] The fourth step is to measure and re-inspect the entire welded structure after completion, and submit it for inspection if it passes the inspection.

[0023] The fifth step is to set up a three-dimensional assembly frame and an assembly frame ground line on the assembly frame;

[0024] The sixth step is to hoist the planar truss into sections and position them on the three-dimensional jig.

[0025] Step 7: Position and assemble the horizontal and diagonal web members between the planar trusses, and then perform segmented welding;

[0026] Step 8: Segmented overall measurement and acceptance;

[0027] The ninth step is to assemble the assembled ultra-high, long-span roof steel truss.

[0028] Furthermore, the specific steps for assembling the assembled ultra-high, large-span roof steel truss include:

[0029] The first step is to place the assembled, segmented ultra-high, large-span roof steel truss onto the sliding track;

[0030] The second step is to place the remaining assembled sections of the ultra-high span roof steel truss onto the sliding track in sequence and splice and fix them to the first truss.

[0031] The third step involves moving the steel truss of the ultra-high, large-span roof to one side in a cyclical manner to assemble and fix it.

[0032] Furthermore, the specific steps for the construction personnel to simulate the installation of the sliding track by constructing a three-dimensional model based on the structure and position of the sliding track support frame and the structure of the ultra-high, large-span roof steel truss include:

[0033] The first step involves the construction personnel classifying the structure and location of the sliding track support frame and the structure of the ultra-high span roof steel truss using a hierarchical classification method. A coding rule based on information organization is proposed to encode the structure and location of the sliding track support frame and the various parts of the ultra-high span roof steel truss.

[0034] The second step involves the construction personnel standardizing the structure and location of the sliding track support frame and the parameters of each part of the ultra-high span roof steel truss, creating a shared parameter file for use in different families and projects.

[0035] The third step involves the construction personnel, based on the above classification results, constructing three-dimensional models of the structure and location of the sliding track support frame and the various parts of the ultra-high span roof steel truss according to the scheme on the construction design drawings using the Tekla Structures software platform. The three-dimensional models are then classified and summarized to establish a structural family library of the structure and location of the sliding track support frame and the ultra-high span roof steel truss.

[0036] Fourth, based on the structure and position of the sliding track support frame and the actual structure of the ultra-high span roof steel truss, the construction personnel call upon the components in the structure family library of the sliding track support frame and the ultra-high span roof steel truss, and through external data file drive, modify the structure and position of the sliding track support frame and the structural parameters of the ultra-high span roof steel truss to generate corresponding instances;

[0037] The fifth step involves the construction workers assembling the components in a unified manner to create a complete three-dimensional model of the structure and location of the sliding track support frame and the structure of the ultra-high, large-span roof steel truss.

[0038] The sixth step involves the construction personnel simulating the installation of the sliding track based on the structure and location of the sliding track support frame and the three-dimensional structural model of the ultra-high, large-span roof steel truss.

[0039] Furthermore, the specific steps for the construction personnel to simulate the installation of the sliding track based on the structure and position of the sliding track support frame and the three-dimensional structural model of the ultra-high, large-span roof steel truss include:

[0040] The first step is for the construction team to determine the size, shape, and location of the sliding track based on the project requirements and the design of the ultra-high, long-span roof steel truss.

[0041] The second step involves the construction workers simulating the installation process of the sliding track using simulation software. This includes installing the basic support structure of the sliding track to ensure its stability, installing each part of the sliding track to ensure accurate alignment and connection, installing the support frame, and checking the entire installation process.

[0042] The third step involves construction workers using simulation software to perform structural analysis and check the stability of the sliding track and supporting frame to ensure their load-bearing capacity.

[0043] Furthermore, the sliding track is welded and fixed to the sliding track support frame.

[0044] Compared with existing technologies, the beneficial effects of the oblique sliding construction method for ultra-high, large-span roof steel trusses provided by this invention are as follows: A sliding track support frame is fixed between the ultra-high, large-span roof steel truss and its installation position; construction personnel construct a three-dimensional model based on the structure and position of the sliding track support frame and the structure of the ultra-high, large-span roof steel truss to simulate the sliding track installation; based on the results of the sliding track installation simulation, the height and position of the sliding track support frame are adjusted to ensure that the overall slope of the sliding track is between 3-5°, and the sliding track is then fixed to the sliding track support frame. On the jig; the ultra-high span roof steel truss is assembled in sections at the processing site and then hoisted onto the assembly platform for final assembly; the assembled ultra-high span roof steel truss sliding track is moved to the installation position of the ultra-high span roof steel truss and fixed; the sliding track and the sliding track support jig are dismantled and unloaded, completing the oblique sliding of the ultra-high span roof steel truss; this can solve the problems of existing ultra-high span roof steel trusses mostly being constructed by high-altitude assembly, which has a long construction period, low construction efficiency, difficulty in ensuring construction quality, and low safety and easy danger caused by high-altitude operations. Attached Figure Description

[0045] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 A flowchart illustrating the operation of a method for the oblique sliding construction of ultra-high, large-span roof steel trusses;

[0047] Figure 2 A schematic diagram of the structure supporting the sliding track frame;

[0048] Figure 3 This is a schematic diagram of the lifting component.

[0049] The attached diagram lists the components represented by each number as follows:

[0050] 10. Support component; 11. Reinforcing tie rod; 20. Converter platform; 30. Lifting component; 31. Support base; 32. Telescopic device; 321. Telescopic rod; 322. First telescopic motor; 33. Platform; 34. Support column. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0052] like Figure 1-3 The diagram shows an operation flowchart of a method for the oblique sliding construction of a super-high, large-span roof steel truss provided by this invention. The method includes the following steps:

[0053] S10: Fixed sliding track support frame between the ultra-high and large-span roof steel truss and its installation position;

[0054] S20: Construction workers create a 3D model based on the structure and location of the sliding track support frame and the structure of the ultra-high, large-span roof steel truss to simulate the installation of the sliding track;

[0055] S30: Adjust the height and position of the sliding track support frame according to the simulation results of the sliding track installation to ensure that the overall slope of the sliding track is between 3-5°, and fix the sliding track on the sliding track support frame;

[0056] S40: The ultra-high and large-span roof steel truss is assembled in sections at the processing site and then hoisted onto the final assembly platform for final assembly.

[0057] S50: Move the assembled ultra-high and large-span roof steel truss sliding track to the ultra-high and large-span roof steel truss installation position and fix it;

[0058] S60: The sliding track and its supporting frame are dismantled and unloaded to complete the oblique sliding of the ultra-high, large-span roof steel truss.

[0059] In use, a sliding track support frame is fixed between the ultra-high, large-span roof steel truss and its installation position. Construction personnel create a 3D model of the sliding track support frame and the ultra-high, large-span roof steel truss based on the structure and position of the support frame, and simulate the installation of the sliding track. Based on the simulation results, the height and position of the sliding track support frame are adjusted to ensure the overall slope of the sliding track is between 3-5°, and the sliding track is then fixed to the support frame. The ultra-high, large-span roof steel truss is assembled in sections at the processing site and then hoisted to the assembly platform for final assembly. The assembled sliding track is moved to the installation position and fixed. Finally, the sliding track and its support frame are dismantled and unloaded, completing the oblique sliding of the ultra-high, large-span roof steel truss.

[0060] In the above technical solution, the sliding track support frame includes a support member 10, a conversion platform 20, and a lifting member 30. The support member 10 includes two members, which are respectively set in the transverse position of the ultra-high and large-span roof steel truss and its installation position. One end of the support member 10 is provided with a conversion platform 20, which is used to adjust the angle position of the sliding track. The support member 10 is provided with a reinforcing tie rod 11 inside, which is used to reinforce the support member 10. The support member 10 adopts an H-shaped steel frame, and a lifting member 30 is provided at its bottom, which is used to adjust the height of the support member 10 and the angle between the two support members 10.

[0061] Furthermore, in the above technical solution, the lifting component 30 includes a support base 31, a telescopic device 32, and a platform 33. The support base 31 has a rectangular structure, and support columns 34 are also provided at the four corners of the bottom. The telescopic device 32 includes a telescopic rod 321 and a first telescopic motor 322. The output shaft of the first telescopic motor 322 is connected to the telescopic rod 321 to provide power for the telescopic rod 321 to extend and retract. The platform 33 is fixedly connected to the telescopic rod 321. The top of the platform 33 is fixedly connected to the support component 10.

[0062] Furthermore, in the above technical solution, the conversion platform 20 includes an I-beam conversion platform, a lattice support frame, and a support steel platform. The I-beam conversion platform is fixed to the top of the support member 10. The I-beam conversion platform includes two steel frames, namely a first frame and a second frame. The second frame is located inside the first frame, and the four corners of the second frame abut against the center of the inner edge of the first frame. The first frame and the second frame are welded and fixed. The lattice support frame is fixed at the connection between the first frame and the second frame. A support steel platform is provided on the top of the lattice support frame, which is used to provide support for the support steel platform. A sliding track is fixedly provided on the top of the support steel platform.

[0063] Furthermore, in the above technical solution, the sliding track includes a slide rail, slide rail fasteners, reinforcing members, and a track beam. The slide rail includes two steel frames, and the slide rail is internally fixed with reinforcing members, which are angle steels, to provide a fixed support structure between the slide rails. The track beam is fixed to the bottom of the slide rail, and its bottom is fixedly connected to the supporting steel platform. The slide rail fasteners include multiple fasteners, which are fixed on the slide rail to connect and fix the slide rail and the track beam.

[0064] Furthermore, in the above technical solution, the specific steps for assembling the ultra-high, large-span roof steel truss in sections at the processing site and then hoisting it onto the assembly platform for final assembly include:

[0065] The first step is to fix the assembly jig and the jig ground layout line on the ground;

[0066] The second step is to install the chord segments onto the assembly jig and position them accordingly.

[0067] The third step is to assemble the web members and weld them to the chord members;

[0068] The fourth step is to measure and re-inspect the entire welded structure after completion, and submit it for inspection if it passes the inspection.

[0069] The fifth step is to set up the three-dimensional assembly frame and the assembly frame ground line on the assembly frame;

[0070] The sixth step is to hoist the planar truss into sections and position them on the three-dimensional jig.

[0071] Step 7: Position and assemble the horizontal and diagonal web members between the planar trusses, and then perform segmented welding;

[0072] Step 8: Segmented overall measurement and acceptance;

[0073] The ninth step is to assemble the assembled ultra-high, long-span roof steel truss.

[0074] Furthermore, in the above technical solution, the specific steps for assembling the assembled ultra-high, large-span roof steel truss include:

[0075] The first step is to place the assembled, segmented, ultra-high, large-span roof steel truss onto the sliding track;

[0076] The second step is to place the remaining assembled sections of the ultra-high span roof steel truss onto the sliding track in sequence and splice and fix them to the first truss.

[0077] The third step involves moving the steel truss of the ultra-high, large-span roof to one side in a cyclical manner to assemble and fix it.

[0078] Furthermore, in the above technical solution, the specific steps for construction personnel to simulate the installation of the sliding track by constructing a three-dimensional model based on the structure and location of the sliding track support frame and the structure of the ultra-high, large-span roof steel truss include:

[0079] The first step involves the construction personnel classifying the structure and location of the sliding track support frame and the structure of the ultra-high, large-span roof steel truss using a hierarchical classification method. They then propose an information organization-based coding rule to encode the structure and location of the sliding track support frame and the various parts of the ultra-high, large-span roof steel truss.

[0080] The second step involves the construction team standardizing the structure and location of the sliding track support frame and the parameters of each part of the ultra-high, large-span roof steel truss, creating a shared parameter file for use in different families and projects.

[0081] The third step involves the construction personnel using the Tekla Structures software platform, based on the above classification results, to construct three-dimensional models of the structure and location of the sliding track support frame and the various parts of the ultra-high and large-span roof steel truss according to the scheme on the construction design drawings. The three-dimensional models are then classified and summarized to establish a structural family library of the sliding track support frame and the ultra-high and large-span roof steel truss.

[0082] The fourth step involves the construction personnel calling upon the structural family library of the sliding track support frame and the ultra-high span roof steel truss, based on the actual structure and location of the sliding track support frame and the actual structure of the ultra-high span roof steel truss. Through external data file driving, the construction personnel modify the structural parameters of the sliding track support frame and the ultra-high span roof steel truss, generating corresponding instances.

[0083] The fifth step involves the construction workers assembling the entire system to create a three-dimensional model of the structure and location of the sliding track support frame and the structure of the ultra-high, large-span roof steel truss.

[0084] The sixth step involves the construction team simulating the installation of the sliding track based on the structure and location of the sliding track support frame and the three-dimensional model of the ultra-high, large-span roof steel truss.

[0085] Furthermore, in the above technical solution, the specific steps for construction personnel to simulate the installation of the sliding track based on the structure and location of the sliding track support frame and the three-dimensional structural model of the ultra-high, large-span roof steel truss include:

[0086] The first step is for the construction team to determine the size, shape, and location of the sliding track based on the project requirements and the design of the ultra-high, long-span roof steel truss.

[0087] The second step involves the construction workers simulating the installation process of the sliding track using simulation software. This includes installing the basic support structure of the sliding track to ensure its stability, installing each part of the sliding track to ensure accurate alignment and connection, installing the support frame, and checking the entire installation process.

[0088] The third step involves construction workers using simulation software to perform structural analysis and check the stability of the sliding track and supporting frame to ensure their load-bearing capacity.

[0089] Furthermore, in the above technical solution, the sliding track is welded and fixed to the sliding track support frame.

[0090] Example: The lower part of the sliding track is supported by a lattice-type frame, with a longitudinal spacing of approximately 15-18 meters. The uprights of the lattice support frame are made of φ180×8 steel pipes, and the web members are made of φ89×6 steel pipes. The temporary support width is 1.5m. To ensure the structural safety of the ski slope steel beams (trusses) at the location of the support frame, an I-beam transfer platform is installed under the support frame. The I-beams of the transfer platform are welded and fixed to the main steel beams of the ski slope. If the transfer platform can only be connected to the ski slope beams, tie rods are added to the ski slope structure for reinforcement based on calculations. Simultaneously, BIM technology is used to simulate the sliding track installation, and the height of the support frame is laid out and marked. Precise on-site processing and installation ensure that the overall slope of the sliding track is 4°. A supporting steel platform, made of H-beams, is first installed on top of the sliding track support frame. Double-track beams are then erected on the steel platform. These beams are H900*300DE H-beams, spaced 1.5 meters apart, with sliding rails fixed to each beam. Angle steel is used for structural connection between adjacent track beams. To ensure in-plane stability, the upper and lower flanges of the sliding track beams are reinforced with L75*5 angle steel. To ensure a secure connection between the track beams and the underlying supporting steel platform, P89*6 steel pipes are diagonally supported on the web of the H900 I-beams and the platform. Stiffening plates are installed on the web of the sliding track beams at intervals of 0.8-1m. For ease of construction and equipment maintenance, a construction safety passage is established along the length of the three track beams, using scaffolding pipes and wooden planks. At the high end is the roof truss assembly platform, with fixed assembly supports positioned there. After the roof truss is assembled in sections on the ground, it will be hoisted onto the assembly supports for final assembly into a complete truss. After the sliding track is erected, the sliding supports are installed on the track. The final assembly support, sliding supports, and sliding track support frame all use prefabricated lattice-type jigs. The height of the sliding supports is also simulated and calibrated using BIM technology, and precisely fabricated on-site to ensure that the roof truss can accurately connect or fit with the installed support truss after fabrication and installation. The sliding supports are connected to the sliding track via sliding shoes. A steel platform is first installed on top of the sliding supports, and steel pipes are used to level the height of the roof truss on the platform. The truss is assembled in sections at the fabrication site on the south side of the high zone. One sliding unit is divided into four sections and assembled on the ground. After assembly, an 800t crawler crane is used to lift it to the final assembly platform for final assembly. After the first sliding unit is assembled, it will slide backward (towards the lower zone) to make room for the final assembly platform for the assembly of the second sliding unit. The second sliding unit is assembled simultaneously with the truss of the first sliding unit to form a whole. After assembly, the whole unit slides backward to allow for the assembly of the third sliding unit. This cycle is repeated, resulting in a total of 5 sliding units for the low-slope roof. After 4 cumulative sliding operations, they are assembled into a whole and then slid to the designed position of the low-slope roof. Following this, the high-slope roof truss assembly and cumulative sliding construction are carried out. Once the end panels of both the high-slope and low-slope roofs are fitted together and installed, the main structure is complete.Next, the roof is unloaded, and the supports are dismantled. The unloading operation mainly involves cutting small sections off the top of the supports. The height of each cut (ΔH) is controlled according to the unloading displacement at the support location (each cut is controlled at 5-10mm) until the structure no longer displaces downwards after a certain step of cutting is completed, at which point the supports are dismantled. During the support unloading process, the displacement of deformation control points is monitored. If a large deviation occurs, the process should be stopped immediately, and the cause should be identified and rectified in conjunction with relevant units before continuing. During unloading, the chord members are cut in stages along the contact point between the chord and the formwork template according to the controlled unloading amount. Each cut is 5-10mm deep. Based on the theoretical deflection value of each unloading point, the cuts are divided into several levels. For example, if the theoretical deflection is 30mm, the first level cut is 10mm. Cutting is stopped, all unloading points are released freely, and total station measurements are taken. Then, the second level cut is performed with a 10mm range, and the same observation is performed after the first step. Finally, the third level cut is performed with a 10mm range. After unloading, the roof truss is subjected to overall deformation monitoring. The main monitoring data are the displacement values ​​at the supports and the deflection deformation values ​​at mid-span. This is used to determine whether the structural displacement, deformation, or deflection meets the design requirements.

[0091] Specifically, the principle of this invention is as follows: a sliding track support frame is fixed between the ultra-high, large-span roof steel truss and its installation position; construction personnel construct a three-dimensional model based on the structure and position of the sliding track support frame and the structure of the ultra-high, large-span roof steel truss, and simulate the installation of the sliding track; the height and position of the sliding track support frame are adjusted according to the results of the sliding track installation simulation to ensure that the overall slope of the sliding track is between 3-5°, and the sliding track is fixed on the sliding track support frame; the ultra-high, large-span roof steel truss is assembled in sections at the processing site and then hoisted to the assembly platform support for final assembly; the assembled ultra-high, large-span roof steel truss sliding track is moved to the installation position of the ultra-high, large-span roof steel truss and fixed; the sliding track and the sliding track support frame are dismantled and unloaded, completing the oblique sliding of the ultra-high, large-span roof steel truss.

Claims

1. A method for constructing a super-high and long-span roof steel truss by oblique sliding, characterized in that, The method comprises the following steps: S10: fixing a sliding rail support jig between the super-high large-span roof steel truss and the installation position thereof; S20: a construction worker constructs a three-dimensional diagram according to the structure and position of the sliding rail support jig and the structure of the super-high large-span roof steel truss, and performs sliding rail installation simulation; S30: adjusting the height and position of the sliding rail support jig according to the result of the sliding rail installation simulation, ensuring that the overall slope of the sliding rail is between 3-5°, and fixing the sliding rail on the sliding rail support jig; S40: after the super-high large-span roof steel truss is assembled in blocks in a processing site, the super-high large-span roof steel truss is hoisted to a general assembly platform support for general assembly; S50: moving the super-high large-span roof steel truss with the sliding rail to the installation position of the super-high large-span roof steel truss and fixing the same; S60: removing and unloading the sliding rail and the sliding rail support jig, and completing the oblique sliding of the super-high large-span roof steel truss; The specific steps of S50 comprise: Firstly, a jig and a jig ground pattern are fixed on the ground; Secondly, chord segments are installed on the jig and positioned; Thirdly, web members are assembled and welded with the chord segments; Fourthly, after overall welding, measurement and rechecking are performed, and the jig is reported for inspection after passing the rechecking; Fifthly, a three-dimensional jig and a jig ground pattern are arranged on the jig; Sixthly, the planar truss segments are hoisted to the three-dimensional jig and positioned; Seventhly, the horizontal and inclined web members between the planar truss segments are positioned and assembled, and are welded in segments; Eighthly, overall measurement and acceptance are performed; Ninthly, the super-high large-span roof steel truss after block assembly is placed on the sliding rail, and the remaining super-high large-span roof steel trusses after block assembly are sequentially placed on the sliding rail and fixed with the first truss, and the super-high large-span roof steel trusses are sequentially moved to one side and assembled and fixed; The specific steps of S20 comprise: Firstly, a construction worker classifies the structure and position of the sliding rail support jig and the structure of the super-high large-span roof steel truss by levels, proposes an encoding rule based on information organization, and encodes each part of the structure and position of the sliding rail support jig and the structure of the super-high large-span roof steel truss; Secondly, the construction worker uniformly standardizes the parameters of each part of the structure and position of the sliding rail support jig and the structure of the super-high large-span roof steel truss, creates a shared parameter file, and uses the shared parameter file in different families and projects; Thirdly, the construction worker constructs a three-dimensional model of each part of the structure and position of the sliding rail support jig and the structure of the super-high large-span roof steel truss based on the classification result and the scheme on the construction design drawing according to the Tekla Structures software platform, classifies and summarizes the three-dimensional model, and establishes a family library of the structure and position of the sliding rail support jig and the structure of the super-high large-span roof steel truss. Fourth step, the construction personnel calls each component in the structure and position of the sliding rail supporting jig and the structure family library of the super-high large-span roof steel truss according to the structure and position of the sliding rail supporting jig and the actual situation of the structure of the super-high large-span roof steel truss, realizes the modification of the structure and position of the sliding rail supporting jig and the structure parameters of the super-high large-span roof steel truss through external data file driving, and generates a corresponding instance; Fifth step, the construction personnel performs unified assembly to form a complete three-dimensional model of the structure and position of the sliding rail supporting jig and the structure of the super-high large-span roof steel truss; Sixth step, the construction personnel determines the size, shape and position of the sliding rail according to the engineering demand and the design of the super-high large-span roof steel truss, simulates the installation process of the sliding rail in the simulation software, installs the foundation support structure of the sliding rail to ensure its stability, installs each part of the sliding rail to ensure accurate alignment and connection, installs the supporting jig, and checks the whole installation process; the construction personnel uses the simulation software to perform structure analysis and check the stability of the sliding rail and the supporting jig to ensure its bearing capacity; The sliding rail supporting jig comprises a supporting piece (10), a conversion table (20) and a lifting piece (30), the supporting piece (10) comprises two and is arranged at the lateral position of the super-high large-span roof steel truss and the installation position thereof respectively; one end of the supporting piece (10) is provided with the conversion table (20), the conversion table (20) is used for adjusting the angle position of the sliding rail, and the inside of the supporting piece (10) is provided with a reinforcing pull rod (11) used for reinforcing the supporting piece (10); the supporting piece (10) adopts an H-shaped steel frame, the bottom of the supporting piece (10) is provided with the lifting piece (30), and the lifting piece (30) is used for adjusting the height of the supporting piece (10) and the angle between the two supporting pieces (10); The lifting piece (30) comprises a supporting base (31), a telescopic device (32) and a platform (33), the supporting base (31) is of a rectangular structure, and four supporting columns (34) are further arranged at the bottom corner positions; the telescopic device (32) comprises a telescopic rod (321) and a first telescopic motor (322), the output shaft of the first telescopic motor (322) is connected with the telescopic rod (321) and is used for providing power for the telescopic rod (321), and the platform (33) is fixedly connected with the telescopic rod (321); and the top of the platform (33) is fixedly connected with the supporting piece (10).

2. The oblique sliding construction method of the super-high and large-span roof steel truss according to claim 1, characterized in that, The conversion platform (20) comprises an I-shaped conversion platform, a lattice support cradle and a support steel platform, the I-shaped conversion platform is fixed on the top of the support (10), the I-shaped conversion platform comprises two steel frames, which are a first frame and a second frame respectively, the second frame is arranged inside the first frame, four corners of the second frame are respectively in contact with the centers of the inner edges of the first frame, and the first frame and the second frame are welded and fixed; the lattice support cradle is fixed at the position where the first frame and the second frame are connected, a support steel platform is arranged on the top of the lattice support cradle, and the lattice support cradle is used for providing support for the support steel platform; and the top of the support steel platform is fixedly provided with a sliding track.

3. The oblique sliding construction method of the super-high and large-span roof steel truss according to claim 2, characterized in that, The sliding track comprises sliding rails, sliding rail fixing members, reinforcing members and track beams, the sliding rails comprise two steel frames, reinforcing members are fixedly arranged in the sliding rails, the reinforcing members are angle steels, and the reinforcing members are used for providing a fixed support structure between the sliding rails; the track beams are fixed at the bottoms of the sliding rails and are fixedly connected with the support steel platform, and the sliding rail fixing members are arranged on the sliding rails and are used for connecting and fixing the sliding rails and the track beams.

4. The oblique sliding construction method of the super-high and large-span roof steel truss according to claim 3, characterized in that, The sliding track is welded and fixed with the sliding track support cradle.

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