Large-span steel structure factory building construction device and construction method

Abstract

The invention belongs to the technical field of building engineering construction, and provides a large-span steel structure plant construction device and method, and the method comprises the following steps: building a three-dimensional design model comprising a structure, a building and electromechanical pipelines of a plant, and carrying out the simulation analysis of the whole construction process; a roof structure of a plant is divided into a plurality of structural sections in the longitudinal direction, and on the ground or a low-altitude platform of a construction site, all the structural sections are spliced into an integral space stress substructure; a hydraulic synchronous lifting mechanism or a hydraulic synchronous sliding mechanism is adopted, and the space stress substructure is integrally installed at the designed position; connecting the interfaces among all the space stress substructures which are mounted in place, so that the roof structure forms a complete whole; through three-dimensional simulation section planning, ground horizontal splicing and integration of the steel structure and enclosure preassembling, hydraulic synchronous lifting or sliding is carried out to guarantee the precision, so that the safety risk is reduced, the construction period is shortened, and the requirements for efficient construction and stable operation and maintenance of a large-span plant are met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of building engineering construction, in particular to a large-span steel structure plant construction device and construction method. BACKGROUND

[0002] Steel structure has become the mainstream load-bearing structure form of large-span plant due to its advantages of high strength, light weight and short construction period, and is widely used in industrial plants, warehouse centers and other fields. However, with the expansion of building scale and the improvement of construction requirements, the traditional construction technology gradually exposes many defects that are difficult to avoid, which seriously restricts the engineering quality, safety and efficiency.

[0003] The traditional mode relies on independent two-dimensional drawings of each professional, and the spatial relationship of architecture, structure and mechanical and electrical pipelines lacks visual verification, resulting in frequent conflicts between pipelines and steel beams in the construction stage, and the rate of demolition and modification is often more than 10%, so the project period is delayed by 15-20 days. Although BIM technology is gradually applied, it is mostly limited to design modeling and not deeply integrated with the whole construction process simulation - the division of structure sections still relies on the experience of engineers, and the stress deformation of substructures in the lifting and sliding stages is not predicted through simulation, which is prone to the contradiction between the weight of the block exceeding the carrying capacity of the equipment or the block being too fragmented to increase the splicing cost, and the construction parameters cannot be optimized in advance.

[0004] Moreover, the traditional high-altitude bulk method needs to set up full scaffolding, and the consumption of steel pipes for a 120-meter-long plant is more than 500 tons, which not only has high material cost, but also has the risk of support collapse; the block hoisting method reduces part of the lifting pressure, but the proportion of high-altitude welding and assembly operation is more than 60%, and the qualified rate of welds is only about 85% due to the influence of wind and temperature, and the manual efficiency is 40% lower than that of ground operation. More importantly, in the traditional process, steel structure assembly and roof enclosure installation are independent processes, which need to be completed twice before the hoisting of the enclosure plate, and the construction time of a single section is increased by 2-3 days, further prolonging the construction period and adding safety risks.

[0005] At the same time, the traditional completion only retains paper drawings and photos, and lacks digital records, so that the plant needs to be re-measured on site during later plant modification and pipeline maintenance, which is time-consuming and labor-intensive and the accuracy is difficult to guarantee. At the same time, the construction process data is not effectively retained, which cannot provide accurate basis for later structure reinforcement and corrosion detection, resulting in large decision blindness in the operation stage and high maintenance cost. SUMMARY

[0006] In order to solve the above technical problems, the application provides a large-span steel structure plant construction device and construction method to solve the problems of design conflict, high rework rate, high-altitude operation risk and completion operation fault in the background technology.

[0007] According to a first aspect of the present disclosure, a large-span steel structure plant construction method is provided, comprising the following steps:

[0008] S1, a three-dimensional design model of the plant containing structures, buildings and mechanical and electrical pipelines is established, and a simulation analysis of the whole construction process is performed;

[0009] S2, the roof structure of the plant is divided into several structural sections in the longitudinal direction, and on the ground or low-altitude platform at the construction site, the steel beams, supports and purlins contained in each of the structural sections are assembled into a whole spatial force substructure;

[0010] S3, a hydraulic synchronous lifting mechanism or a hydraulic synchronous sliding mechanism is used to install the spatial force substructure assembled on the ground in step S1 to the designed position as a whole;

[0011] S4, the interfaces between all the installed spatial force substructures are connected, so that the roof structure forms a complete whole.

[0012] Preferably, in step S2, the division of the structural section is based on the simulation analysis;

[0013] When assembling the spatial force substructure, a lying assembly process is used, that is, the spatial force substructure is assembled and welded on the ground in a simulated design posture in the air; and part or all of the roof enclosure in the section is installed on the ground.

[0014] Preferably, in step S3, the specific steps of installing by using a hydraulic synchronous lifting structure include:

[0015] S31a, a hydraulic lifter is arranged on the top of the bearing column;

[0016] S32a, the spatial force substructure assembled on the ground is connected with the hydraulic lifter;

[0017] S33a, after the trial lifting and static load test are performed and the safety and synchronism of the structure are confirmed, the spatial force substructure is synchronously lifted to the designed elevation;

[0018] S34a, the spatial force substructure lifted in place is fixed on the bearing structure.

[0019] Preferably, in step S3, the specific steps of installing by using a hydraulic synchronous sliding mechanism include:

[0020] S31b, a sliding track is arranged on the installation axis;

[0021] S32b, the first spatial force substructure is assembled on the ground at one end of the plant, and is pushed and slid by one pitch;

[0022] S33b, assembling the next spatial force substructure at the assembling position, connecting it with the part that has completed sliding, forming a combination to continue pushing and sliding, and sequentially accumulating until covering the whole design area;

[0023] S34b, lowering the combination that has finally been positioned as a whole, and fixing it on the permanent support.

[0024] Preferably, the actions of the hydraulic synchronous lifting mechanism and the hydraulic synchronous sliding mechanism are centrally controlled by a computer, so that each action point synchronously operates;

[0025] After the step S4 is completed, point cloud data at the completion point is obtained by a three-dimensional laser scanning technology, and is compared with the three-dimensional design model to form a digital completion record.

[0026] According to a second aspect of the present disclosure, a large-span steel structure plant construction device is provided, comprising:

[0027] A model processing and simulation module is configured to establish a three-dimensional design model of the plant, which contains structures, buildings and mechanical and electrical pipelines, and to perform simulation analysis of the whole construction process to guide the division of the structure section;

[0028] A ground assembling platform is arranged at the construction site, and is configured to assemble steel beams, supports and purlins contained in the divided structure section into a whole spatial force substructure on the ground or in low air;

[0029] A hydraulic synchronous operation module comprises a hydraulic synchronous lifting mechanism and a hydraulic synchronous sliding mechanism, and is configured to install the spatial force substructure as a whole to the design position;

[0030] A folding operation module is configured to connect interfaces between all installed spatial force substructures to form a complete whole of the roof structure.

[0031] Preferably, the ground assembling platform comprises a hardened and calibrated assembling reference surface, which is provided with positioning and fixing components, and is configured to simulate the high-altitude design posture to assemble the spatial force substructure by using the lying assembling process, and to support the installation of part or all of the roof enclosure in the section on the ground.

[0032] Preferably, the hydraulic synchronous lifting mechanism comprises:

[0033] A hydraulic lifting device arranged on the top of the bearing column;

[0034] A lifting hanger and a special anchor device are configured to connect the spatial force substructure assembled on the ground with the hydraulic lifting device;

[0035] The hydraulic synchronous lifting mechanism is configured to perform trial lifting and static load testing, and after confirming safety and synchronization, synchronously lift the spatial force substructure to the design elevation and fix.

[0036] Preferably, the hydraulic synchronous sliding mechanism comprises:

[0037] A sliding track laid on the installation axis;

[0038] A hydraulic pushing device for pushing the first spatial force substructure assembled on the ground at one end of the workshop to slide by one pitch, and then connecting the subsequently assembled substructures to form an assembly and continue to accumulate and push the sliding;

[0039] A synchronous lifting and lowering device for lowering and fixing the assembly in place as a whole on the permanent support.

[0040] Preferably, the hydraulic synchronous operation system further comprises a computer centralized controller in communication connection with the hydraulic synchronous lifting mechanism and the hydraulic synchronous sliding mechanism, for controlling the synchronous operation of each action point.

[0041] Compared with the prior art, the present application has the following beneficial effects:

[0042] 1. In the present application, most of the high-altitude welding and assembly operations are transferred to the ground by adopting ground lying assembly and roof enclosure pre-assembly, thereby reducing the high-altitude operation time and the accident rate; and the three-dimensional simulation is used to solve the multi-specialty conflicts in advance, thereby avoiding the demolition and rework during construction, saving the construction period, and significantly improving the operation efficiency.

[0043] 2. In the present application, the hydraulic synchronous operation is controlled by PLC, so as to realize the reduction of the synchronous deviation of each action point and the improvement of the roof installation elevation precision; the point cloud and the BIM model are compared by using the digital completion three-dimensional laser scanning, the operation bolts are tightened three times in combination with the weld inspection, the structural deformation amount is reduced, the large-span bearing requirement is met, and the digital completion record is directly connected to the operation and maintenance system through the BIM throughout the whole process, so that the operation and maintenance efficiency is improved without the need for re-measurement in the later period of reconstruction and maintenance.

[0044] 3. In the present application, the weight, stress and deformation characteristics of the substructure are analyzed by simulation, the section division parameters are quantitatively determined, the multi-specialty conflicts are predicted in advance, and the section division is ensured to be completely adapted to the equipment, process and structure safety; and when the steel structure substructure is lying assembled on the ground in the high-altitude design posture, the roof enclosure installation of the section is simultaneously completed, which not only reduces the high-altitude operation amount, but also ensures the accurate relative position of the enclosure plate and the steel structure, thereby greatly compressing the construction period; and the hydraulic synchronous lifting and the hydraulic synchronous sliding two modes are integrated, so that the site conditions can be flexibly selected and different project scenes can be adapted. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 Flow chart of the construction method of the large-span steel structure plant of the present application;

[0046] Figure 2 Specific step chart of the installation of the present application through hydraulic synchronous lifting structure;

[0047] Figure 3 Specific step flow chart of the installation of the present application through hydraulic synchronous sliding structure;

[0048] Figure 4 Block diagram of the construction device of the large-span steel structure plant of the present application. DETAILED DESCRIPTION

[0049] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0050] Example one: the present application provides a large-span steel structure plant construction method, as shown in the accompanying drawings Figure 1 to the accompanying drawings Figure 3 , including the following steps:

[0051] S1, a three-dimensional design model of the plant containing structure, building and mechanical and electrical pipeline is established, and simulation analysis of the whole construction process is carried out; through the simulation of the whole construction process, the possible hoisting interference, structural instability, unreasonable installation sequence and other problems can be found and solved in advance in the virtual environment, the construction scheme is optimized, and the rework and loss caused in the actual construction are avoided;

[0052] S2, the roof structure of the plant is divided into several structural sections in the longitudinal direction, and the steel beams, supports and purlins contained in each structural section are assembled into an integral spatial force substructure on the ground or low-altitude platform at the construction site; the division of the structural section is determined based on the simulation analysis;

[0053] When assembling the spatial force substructure, horizontal assembly process is adopted, that is, the assembly and welding are carried out on the ground by simulating the design posture in the high altitude; and the installation of part or all of the roof enclosure in the section is completed on the ground.

[0054] The section is determined based on the simulation analysis of S1, to ensure that the size and weight of each substructure are suitable for the construction equipment, and the stress state meets the design requirements. Avoiding that the substructure is too large to cause insufficient bearing of the equipment, or too small to cause too many splicing times, balancing the construction efficiency and structural safety. The steel beams, supports and purlins are assembled on the ground / low-altitude platform, and the welding is carried out by simulating the design posture in the high altitude; part / whole of the roof enclosure installation is completed synchronously; thereby greatly reducing the high-altitude welding and assembly operation, reducing the safety risks such as falling and object impact; the ground operation environment is more stable, and the welding quality is easier to control; the roof enclosure is installed in advance, which can save the subsequent high-altitude operation time and shorten the overall construction period.

[0055] S3, using a hydraulic synchronous lifting mechanism or a hydraulic synchronous sliding mechanism, the spatial force substructure assembled on the ground in step S1 is installed to the design position as a whole; this step is achieved through hydraulic synchronous lifting and hydraulic synchronous sliding;

[0056] The specific steps of installation using the hydraulic synchronous lifting mechanism include:

[0057] S31a, a hydraulic lifter is arranged on the top of the load-bearing column;

[0058] S32a, the spatial force substructure assembled on the ground is connected with the hydraulic lifter;

[0059] S33a, after the trial lifting and static load test, the spatial force substructure is synchronously lifted to the design elevation after confirming the safety and synchronism of the structure;

[0060] S34a, the spatial force substructure lifted to the position is fixed on the load-bearing structure.

[0061] The substructure is connected with the hydraulic lifter on the top of the column, and after the trial lifting and static load test, the substructure is synchronously lifted to the design elevation and fixed; wherein, the trial lifting and static load test can verify the structural strength and the synchronism of the lifting equipment in advance, avoid the deformation or instability of the structure during lifting, and ensure the construction safety; the hydraulic synchronous control can ensure that the forces at all lifting points are uniform, the posture of the substructure is stable during lifting, and the design position is accurately connected; thus, a large number of temporary high-altitude supports are not needed to be built, and the material cost and site occupation are reduced.

[0062] The specific steps of installation using the hydraulic synchronous sliding mechanism include:

[0063] S31b, a sliding track is arranged on the installation axis;

[0064] S32b, the first spatial force substructure is assembled on the ground at one end of the factory building, and is pushed and slid by one pitch;

[0065] S33b, the next spatial force substructure is assembled at the assembly position, and is connected with the part that has been slid, to form a combination, and then the combination is continuously pushed and slid, and the process is repeated until all the design areas are covered;

[0066] S34b, the combination finally in position is lowered as a whole, and is fixed on the permanent support.

[0067] The substructure assembly gradually covers the design area by means of assembly-sliding-accumulation connection along the sliding track, and finally the whole structure is fixed by descending; the accumulation jacking and sliding are suitable for super-long and large-span workshops, and the complete substructure does not need to be assembled at one time, so that the ground assembly site requirement is reduced; the sliding track provides a stable path, reduces the friction damage during the movement of the substructure, and ensures the integrity of the assembly after assembly; the overall descending fixation can ensure that the assembly closely fits the permanent support, avoids uneven local stress, and improves the long-term stability of the structure.

[0068] The actions of the hydraulic synchronous lifting mechanism and the hydraulic synchronous sliding mechanism are centrally controlled by a computer, so that the action points are synchronously operated; thus, the spatial stress substructure is effectively prevented from being distorted and cracked due to too fast / slow local action, and the installation precision and structural safety are further improved.

[0069] S4, connecting the interfaces between all the installed spatial stress substructures to form a complete whole roof structure; after step S4, point cloud data of the completed structure are obtained by using a three-dimensional laser scanning technology, and are compared with the three-dimensional design model to form a digital completion record.

[0070] By connecting the interfaces of all the installed substructures, a complete roof structure is formed, the roof is converted from a dispersed substructure to a whole stress system, the core use requirements such as wind resistance, earthquake resistance and bearing of the large-span workshop are met, the consistency of the completed structure and the design is accurately verified, and the construction quality is ensured to meet the standards; the digital archives facilitate subsequent maintenance and reconstruction of the workshop, and improve the efficiency of asset life cycle management.

[0071] Embodiment two: the application also provides a large-span steel structure workshop construction device, as shown in the accompanying drawings, Figure 4 comprises:

[0072] A model processing and simulation module is used to establish a three-dimensional design model of the workshop including structures, buildings and mechanical and electrical pipelines, and to perform simulation analysis of the whole construction process to guide the division of the structure section; the model processing and simulation module replaces traditional two-dimensional drawings, reduces errors and omissions caused by asymmetric information of multiple specialties, and improves the scientificity of construction planning.

[0073] A ground assembly platform is arranged at the construction site and is used to assemble steel beams, supports and purlins included in the divided structure section into a whole spatial stress substructure on the ground or at a low altitude; the ground assembly platform comprises a hardened and calibrated assembly reference surface, the assembly reference surface is provided with positioning and fixing components, and is used to simulate the high-altitude design posture to assemble the spatial stress substructure by using the horizontal assembly process, and supports the installation of part or all of the roof enclosure in the section on the ground.

[0074] The ground assembling platform ensures that the space stress substructure has no deviation in assembling, avoids misalignment of components caused by uneven ground, improves the overall accuracy of the substructure, prevents displacement of components during assembly, ensures that the posture during horizontal assembly is consistent with the requirements of high-altitude installation, reduces the workload of later adjustment, and supports ground installation of the roof enclosure to provide hardware conditions for reducing high-altitude work.

[0075] The hydraulic synchronous operation module comprises a hydraulic synchronous lifting mechanism, a hydraulic synchronous sliding mechanism, and a computer centralized controller, and is used for installing the space stress substructure as a whole to a design position;

[0076] The hydraulic synchronous lifting mechanism comprises:

[0077] The hydraulic lifting device is arranged at the top of the load-bearing column.

[0078] The lifting hanger and the special anchor are used for connecting the space stress substructure assembled on the ground to the hydraulic lifting device.

[0079] The hydraulic synchronous lifting mechanism is configured to perform trial lifting and static load testing, and after confirming safety and synchronization, the space stress substructure is synchronously lifted to the design elevation and fixed.

[0080] The hydraulic lifting device, the lifting hanger, and the special anchor are used to realize safe lifting and fixing of the substructure, built-in trial lifting and static load testing functions, wherein the hydraulic lifting device provides stable and controllable lifting power, and is suitable for substructures of different weights; the lifting hanger and the special anchor ensure that the substructure is firmly connected to the lifting device to avoid falling during lifting; the trial lifting and static load testing functions are built-in, and no additional testing device needs to be built, saving construction preparation time.

[0081] The hydraulic synchronous sliding mechanism comprises:

[0082] The sliding track is laid on the installation axis.

[0083] The hydraulic pushing device is used for pushing and sliding the first space stress substructure assembled on the ground at one end of the factory building by one pitch, and then connecting the subsequently assembled substructures to form a combination and continuing to accumulate and push and slide.

[0084] The synchronous lifting and lowering device is used for lowering and fixing the combination as a whole on the permanent support.

[0085] The sliding track, the hydraulic pushing device, and the synchronous lifting and lowering device are used to realize cumulative sliding and accurate positioning of the substructure; the sliding track adopts a low-friction design to reduce the sliding resistance of the substructure and reduce the energy consumption of the equipment; the hydraulic pushing device can accurately control the sliding speed and distance to meet the accurate sliding requirement of one pitch; and the synchronous lifting and lowering device can ensure the overall lifting and lowering of the combination to avoid damage to the structure caused by local stress.

[0086] The hydraulic synchronous operation system further comprises a computer centralized controller, which is in communication connection with the hydraulic synchronous lifting mechanism and the hydraulic synchronous sliding mechanism, and is used for controlling synchronous operation of each action point;

[0087] The computer centralized controller is in communication connection with the hydraulic lifting or sliding mechanism, and uniformly issues an action instruction to control synchronous operation of each action point, thereby replacing manual control and avoiding human operation errors; the pressure and displacement data of each action point are monitored in real time, and the action can be adjusted in time to ensure construction safety and precision.

[0088] The closing operation module is used for connecting interfaces between all installed and positioned space force substructures, so that the roof structure forms a complete whole; by providing an interface connecting tool and process suitable for large-span structures, the interface connection strength is ensured to meet the requirements of the structure performance of the plant.

[0089] Experimental example: taking a "single-span 48-meter, 120-meter-long steel structure plant" as an example, the actual operation is decomposed according to the steps:

[0090] Step 1: The structural engineer uses Tekla to establish a three-dimensional model of the steel column, steel beam and support; the mechanical and electrical engineer establishes a water supply and drainage and electrical pipeline model in Revit, and then integrates the two models to eliminate the conflict between the pipeline and the steel beam; and uses MIDASGen to simulate the structure stress in the lifting stage: input the substructure weight and the number of lifting points, analyze the maximum stress and deformation of the steel beam during lifting; output the integrated BIM model and the construction simulation report, which includes the section division suggestion and the lifting equipment selection parameters;

[0091] Step 2: Section division: according to the rated load of the hydraulic lifter, the 120-meter-long roof is divided into 10 sections longitudinally, each section is 12 meters long, the weight is controlled within 42-45 tons, and the roof support position is avoided, and a splicing interface is arranged at each end of each section;

[0092] Ground lying: a 10cm-thick C30 concrete assembly area is poured on one side of the plant, the levelness is calibrated with a level, and a steel frame is welded according to the design slope (15°) of the roof; the steel beam, support and purlin are hoisted to the frame and fixed with steel plate positioning blocks (spacing 2 meters), first spot-welded, then fully welded with CO2 gas protection welding, and the weld height is 8mm; the roof enclosure completes the installation of the profiled steel sheet in this section, which is fixed on the purlin with self-tapping screws, and the screw spacing is 300mm.

[0093] Step 3: According to the site conditions, two installation methods are selected: hydraulic synchronous lifting mechanism for no obstacles in the plant, and hydraulic synchronous sliding mechanism for narrow site;

[0094] Step 3a, if hydraulic synchronous lifting mechanism is adopted, through hydraulic lift, lifting hanger, special hydraulic anchor (model HM15), PLC control system;

[0095] Weld steel corbel on the top of bearing column, fix 4 hydraulic lifts symmetrically on the corbel, use level to calibrate the axis of the lift, use lifting hanger to connect the top lifting point of substructure (lifting point is set at 1 / 4 length of steel beam), anchor passes through the hanger and connects with the piston rod of the lift, use total station to calibrate the perpendicularity of the substructure;

[0096] Trial lifting: start the PLC control system, stop after lifting the substructure by 10 cm, stand for 1 hour, check the oil leakage of the lift and the deformation of the structure; static load test: load according to 1.2 times the design load (54 tons), stand for 2 hours, after no abnormality, lift synchronously at a speed of 5 m / h to the design elevation (12 meters); after lifting in place, use temporary steel support to press the bottom of the substructure, remove the lift and hanger, and then connect and fix the substructure and the steel corbel on the top of the column with high-strength bolts.

[0097] Step 3b, if hydraulic synchronous sliding mechanism is adopted, through sliding track, hydraulic pusher, synchronous jacking equipment;

[0098] Pour concrete foundation along the longitudinal direction of the workshop (120 meters direction), fix steel rails as sliding tracks, track spacing is 6 meters (matching the width of the substructure), weld smoothly at the track joint; assemble the first 12-meter section at one end of the workshop, install sliding supports at the bottom of the substructure (matching the steel rails), start the hydraulic pusher, slide the substructure along the track by 12 meters (one pitch), and fix it with steel wedges after reaching the position; assemble the second section at the original assembly position, connect it with the first section with high-strength bolts to form a 24-meter combination, then slide it by 12 meters synchronously with the pusher, repeat this process until all 10 sections are slid into position; start the synchronous jacking equipment (4, symmetrically arranged), lift the combination by 5 cm, remove the sliding track and support, and then slowly descend to the permanent support at a speed of 1 m / h, monitor the horizontal deviation during the descending process with a total station.

[0099] Step 4, clean all rust and welding slag at the interfaces of the substructures, tighten the high-strength bolts to the designed torque with a torque wrench, tighten each bolt for 3 times; perform repair welding on the interface welds and detect the quality of the welds with an ultrasonic flaw detector;

[0100] Scan the entire roof with FaroFocus S70 three-dimensional laser scanner, scanning accuracy ±2mm, scanning interval 10 meters, obtain point cloud data of the entire workshop; import the point cloud data into CloudCompare software, compare with the BIM model established in step 1, adjust the positions with deviation exceeding 3mm, finally generate a digital completion model, and archive it to the workshop operation and maintenance system.

[0101] It is important to note that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible in the light of the novel teachings provided herein. Other substitutions, modifications, changes and omissions can also be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the spirit of the present application as expressed in the appended claims. Accordingly, the present application is not intended to be limited to the particular embodiments described herein, but is to be accorded the widest scope consistent with the claims, the principles and the practical applications of the teachings disclosed herein.

[0102] Furthermore, in order to provide a concise description of the exemplary embodiments, not all features of an actual implementation can be described (that is, those not relevant to the presently contemplated best mode for carrying out the present application, or those not necessary for an understanding of the present application).

[0103] It should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application, not to limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A method of constructing a large-span steel structure plant, characterized by, The method comprises the following steps: S1, a three-dimensional design model of a factory building including structures, buildings and mechanical and electrical pipelines is established, and a simulation analysis of the whole construction process is performed; S2, the roof structure of the factory building is divided into several structural sections in the longitudinal direction, and on the ground or low-altitude platform at the construction site, steel beams, supports and purlins included in each structural section are assembled into an integral spatial force substructure; S3, a hydraulic synchronous lifting mechanism or a hydraulic synchronous sliding mechanism is used to integrally install the spatial force substructure assembled on the ground in step S1 to the design position; S4, the interfaces between all the installed spatial force substructures are connected, so that the roof structure forms a complete whole.

2. The construction method of a large-span steel structure plant according to claim 1, wherein, In step S2, the division of the structural section is determined based on the simulation analysis; When assembling the spatial force substructure, a lying assembly process is adopted, that is, the spatial force substructure is assembled and welded on the ground in a simulated design posture in the air.

3. The construction method of a large-span steel structure plant according to claim 1, wherein, The specific steps of installing the spatial force substructure by using the hydraulic synchronous lifting mechanism in step S3 include: S31a, a hydraulic lifter is arranged at the top of the bearing column; S32a, the spatial force substructure assembled on the ground is connected with the hydraulic lifter; S33a, after the structure safety and synchronism are confirmed through trial lifting and static load testing, the spatial force substructure is synchronously lifted to the design elevation; S34a, the spatial force substructure lifted in place is fixed to the bearing structure.

4. The method of claim 1, wherein the method further comprises: The specific steps of installing the spatial force substructure by using the hydraulic synchronous sliding mechanism in step S3 include: S31b, a sliding track is arranged on the installation axis; S32b, a first spatial force substructure is assembled on the ground at one end of the factory building, and is pushed and slid by one pitch; S33b, a next spatial force substructure is assembled at the assembly position, and is connected with the part that has been slid to form a combination, and then is continuously pushed and slid, and is sequentially accumulated until all the design areas are covered; S34b, the combination finally in place is integrally lowered and fixed to the permanent support.

5. The method of claim 1, wherein the method further comprises: The actions of the hydraulic synchronous lifting mechanism and the hydraulic synchronous sliding mechanism are controlled by a computer, so that the action points are synchronously operated; ​ After step S4 is completed, point cloud data of the completed building is obtained by using a three-dimensional laser scanning technology, and is compared with the three-dimensional design model to form a digital completion record.

6. A construction device for a long-span steel structure plant, which is used in a construction method for a long-span steel structure plant according to any one of claims 1 to 5, characterized by The method comprises the following steps: A model processing and simulation module is used to establish a three-dimensional design model of a factory building including structures, buildings and mechanical and electrical pipelines, and to perform a simulation analysis of the whole construction process to guide the division of structural sections; A ground assembly platform is arranged at a construction site, and is used to assemble steel beams, supports and purlins included in the divided structural sections into an integral spatial force substructure on the ground or at a low altitude; A hydraulic synchronous operation module includes a hydraulic synchronous lifting mechanism and a hydraulic synchronous sliding mechanism, and is used to integrally install the spatial force substructure to the design position; A closing operation module is used to connect the interfaces between all the installed spatial force substructures, so that the roof structure forms a complete whole.

7. The construction device for a large-span steel structure plant according to claim 6, characterized in that: The ground assembling platform comprises a hardened and calibrated assembling reference surface, which is provided with positioning and fixing components, and is used for assembling the spatial force substructure in a high-altitude design posture by using a lying assembling process, and supporting installation of part or all of the roof enclosure in the section on the ground.

8. The construction device for a large-span steel structure plant according to claim 6, wherein The hydraulic synchronous lifting mechanism comprises: a hydraulic lifting device arranged on the load-bearing column; a lifting hanger and a special anchor device, which are used for connecting the spatial force substructure assembled on the ground and the hydraulic lifting device; the hydraulic synchronous lifting mechanism is configured to perform trial lifting and static load testing, and after safety and synchronization are confirmed, the spatial force substructure is synchronously lifted to the design elevation and fixed.

9. The construction device for a large-span steel structure plant according to claim 6, wherein The hydraulic synchronous sliding mechanism comprises: a sliding track arranged on the installation axis; a hydraulic pushing device, which is used for pushing the first spatial force substructure assembled on the ground at one end of the workshop to slide by one pitch, and then sequentially connecting the subsequently assembled substructures to form an assembly and continue to accumulate and push the sliding; a synchronous jacking and lowering device, which is used for lowering the finally positioned assembly as a whole and fixing it on the permanent support.

10. The apparatus according to claim 6, wherein The hydraulic synchronous operation module further comprises a computer centralized controller, which is in communication connection with the hydraulic synchronous lifting mechanism and the hydraulic synchronous sliding mechanism, and is used for controlling synchronous operation of each action point.

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