Inverted hanging type sliding assembly method for roof steel structure of large waste incineration power plant

Abstract

An inverted hanging type sliding assembling method for a roof steel structure of a large waste incineration power plant comprises the steps that the distance between stand columns used for installing the roof steel structure is measured, the roof steel structure is clearly divided into several sections, the structural size of each section of the roof steel structure is deepened, and each section of the roof steel structure is manufactured; the number and the structure size of temporary connecting beams used for connecting all the sections of roof steel structures in the pushing process are calculated, all the temporary connecting beams are manufactured, and sliding shoes are arranged at the bottoms of all the temporary connecting beams; arranging a flat loading platform; a sliding rail, a pushing device and a synchronizer are erected along the pushing operation travel path; and then pushing operation is carried out. The method is particularly suitable for installation operation of a roof steel structure with large roof span, high height and difficulty in mechanical occupation, and has the advantages of high automation operation degree, convenience and flexibility in operation, good safety, high reliability, wide application range and high universality.

Description

Technical Field

[0001] The invention relates to a construction technology of a roof steel structure, in particular to a top-pushing and sliding technology of a large-span, non-integral roof steel truss, and specifically to an inverted sliding assembly method of a roof steel structure of a large-scale waste incineration power plant. Background Art

[0002] With the gradual development of my country's urban domestic waste incineration industry, the number of waste incineration plants put into operation has increased year by year, and the structural size of functional single buildings in waste incineration plants has also been increasing. At the same time, with the continuous improvement of the country and society's awareness of environmental protection and urban functional planning, waste incineration plants are no longer a single factory building appearance, but more and more low-key, these buildings that have made important contributions to the operation of the city are gradually integrated into urban greening and landscape.

[0003] At present, a city's renewable energy utilization center is a large-scale visitor center that combines a waste incineration power plant with a green landscape for citizens, born under this general trend. In this incineration power plant project, 160 giant rigid concrete structural columns are used to support the large roof of the entire plant area, and the large roof is designed as a soil-covered roof. Under the large roof, the functional areas of the plant are further divided.

[0004] Among them, the garbage incineration area (especially the plant where the incineration boiler is located) relies on columns to build a steel structure roof. The steel structure roof has some specific objective factors, such as: the overall height of the roof is about 60m from the ground; the span between adjacent columns is large. These two objective factors have brought challenges to the actual on-site construction of the steel structure roof: on the one hand, the roof is 60m above the ground. If the installation operation is carried out by hoisting, large hoisting machinery and equipment are required. At the same time, although the span between adjacent columns is large, it cannot meet the positioning and deployment space requirements of large hoisting machinery and equipment. At the same time, according to the design, the roof steel structure in this area is also overlapped with the columns (such as Figure 1 ), therefore, the roof steel structure cannot be installed using the traditional jacking method.

[0005] Taking the above factors into consideration, a new installation method needs to be proposed to meet the installation requirements of the above roof steel structure. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned defects and to provide an inverted sliding assembly method for the roof steel structure of a large-scale waste incineration power plant.

[0007] In order to achieve the above object, the present invention is achieved in the following ways: An inverted sliding assembly method for a roof steel structure of a large-scale waste incineration power plant, comprising: 1. Preliminary measurement and design; Step 1: Measure the spacing between columns used to install the roof steel structure and clearly divide the roof steel structure into several sections; Step 2: Design the connection structure between each section of the roof steel structure and the columns; Step 3: According to the size requirements of step 1, step 2 and design drawings, deepen the structural dimensions of each section of the roof steel structure and make each section of the roof steel structure; Step 4: According to Step 1 and Step 2, the number and structural dimensions of temporary connecting beams used to connect the roof steel structures of each section during jacking are calculated and each temporary connecting beam is manufactured, wherein a sliding shoe for jacking operation is provided at the bottom of each temporary connecting beam; 2. On-site segmental assembly and single-frame jacking operation of the roof steel structure; Step 5: Set a flat-mounted platform between the columns on the starting end of the jacking operation; Step 6: along the route of the pushing operation, at least two sliding rails are set up between the columns involved and pushers are set up, and synchronizers are set between adjacent pushers; Step 7: Connect the sections of the single-frame roof steel structure with temporary connecting beams on the assembly platform in the assembly order to form a single-frame roof steel structure, wherein the temporary connecting beams are arranged on the top of each section of the roof steel structure, and when adjacent sections of the frame steel structure are connected using the same temporary connecting beam, a gap is formed at the bottom of the temporary connecting beam, and the gap is used for the columns to pass through and put the roof steel structure in place; Step 8: Connect the sliding shoe at the bottom of the temporary connecting beam in step 7 to the jacking device; push the first roof steel structure forward 8m through the jacking device and synchronizer; Step 9. Repeat step 7 to assemble the second roof steel structure and connect it to the first roof steel structure; Step 10: Repeat step 8 to push the second roof steel structure forward 8m; Step 11: Repeat steps 7 to 10 until all single-frame roofs slide to the designed position; Step 12: Weld the roof steel structure trusses and columns of each section together according to the connection structure described in step 2, remove the crawler, synchronizer, track and other temporary measures, and the entire sliding process is completed.

[0008] The advantages and features of the inverted sliding assembly method proposed by the present invention are summarized as follows: 1. A temporary connecting beam is proposed to temporarily connect the sections of roof steel structure that were originally separated by columns, so as to form a complete "single-frame roof steel structure" for subsequent jacking operations.

[0009] 2. The self-locking hydraulic crawler is used to avoid the use of reaction frames, making the structure more compact. During the sliding process, it can automatically clamp the track to form a reaction force to realize the forward movement of the sliding component. Compared with the traditional tool-type formwork construction process, the sliding equipment is small in size, light in weight, and has a large carrying capacity. It is particularly suitable for horizontal sliding of large-tonnage components and equipment in a small space or indoors. The traditional reaction frame is abandoned, and the clamp is used to clamp the track to act as an automatic shift reaction frame for pushing; it can push and pull at multiple points to disperse the horizontal load on the lower supporting structure; the pushing reaction force action point is very close to the sliding support point, and the requirements for track installation are low; the hydraulic crawler is rigidly connected to the object to be pushed, the force transmission is direct, and the positioning accuracy is high; the working reliability is good and the failure rate is low; the hydraulic crawler has reverse motion self-locking, which makes the sliding process very safe, and the component can be reliably locked at any position in the sliding process for a long time; the equipment has a high degree of automation, convenient and flexible operation, good safety, high reliability, wide application, and strong versatility.

[0010] Secondly, the present invention further deepens the steps of the above-mentioned inverted sliding assembly method, specifically: In step 2, the connection structure used to connect each section of the roof steel structure to the column refers to the corbel structure reserved at the top of the column.

[0011] In step 4, the temporary connecting beam used to connect the various sections of the roof steel structure during jacking includes a shoulder pole beam at the top and roof steel structure pulling columns and sliding shoe supports respectively arranged at the bottom of the shoulder pole beam. There are multiple roof steel structure pulling columns, and several of them are evenly spaced along the length direction of the bottom of the shoulder pole beam. They are used to connect the shoulder pole beam with the various sections of the roof steel structure, and the sliding shoe supports are used to connect the sliding shoe and the shoulder pole beam.

[0012] In step 4, arc-shaped limit baffles are symmetrically set at the bottom of the sliding shoe and the track is placed between the limit baffles on both sides to avoid jamming between the sliding shoe and the track during the pushing process; the pusher refers to a self-locking hydraulic crawler, which is directly rigidly connected to the roof steel structure without using a reaction frame, and then a reaction force is formed by clamping the track to achieve the sliding forward of the roof steel structure.

[0013] In step 6, a track pressure plate is embedded between the track and the column.

[0014] In step 7, before the jacking operation, reinforcing ribs or rib plates are arranged along the webs of each section of the roof steel structure to strengthen the rigidity of each section of the roof steel structure so as to avoid deformation during the jacking operation.

[0015] In step 11, during the jacking process, when a column is encountered that obstructs the path of the roof steel structure, the column is cut and a gap is formed so that the roof steel structure can pass through the gap smoothly.

[0016] Based on the above technical scheme, the inverted sliding assembly method proposed in the present invention further adopts a graded loading sliding strategy, that is, when sliding begins, the extension cylinder pressure of the jacking cylinder of the jacking device is gradually increased to 20% and 40% of the required pressure, respectively. When everything is normal, the pressure is continued to be loaded to 60%, 80%, 90%, and 100% until the structure is separated from the jacking support system; after the structural load is completely transferred to the jacking cylinder of the jacking device, the extension cylinder pressure of the jacking cylinder is gradually increased to 20% and 40% of the required pressure, respectively. When everything is normal, the pressure is continued to be loaded to 60%, 80%, 90%, and 100% until the structure is about to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The position relationship between the roof and the columns of a factory building where a waste incineration boiler is located in the embodiment Figure 1 .

[0018] Figure 2 The position relationship between the roof and the columns of a factory building where a waste incineration boiler is located in the embodiment Figure 2 .

[0019] Figure 3 It is a connection relationship diagram between a temporary connecting beam and a section of the roof steel structure in the embodiment.

[0020] Figure 4 It is a diagram showing the top-pushing state of a temporary connecting beam and a section of the roof steel structure in the embodiment.

[0021] Figure 5 It is a schematic diagram of the jacking and propulsion of each roof steel structure in the embodiment. DETAILED DESCRIPTION

[0022] The technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments in the embodiments of the present application are within the scope of protection requested by the present application.

[0023] like Figure 1 to Figure 5 , an inverted sliding assembly method for the roof steel structure of a large-scale waste incineration power plant; divided into early measurement, design and later assembly and jacking operations. Specifically including: 1. Measurement and design Step 1: Measure the spacing between columns used to install the roof steel structure and clearly divide the roof steel structure into several sections; Step 2: Design the connection structure between each section of the roof steel structure and the columns; Step 3: According to the size requirements of step 1, step 2 and design drawings, deepen the structural dimensions of each section of the roof steel structure and make each section of the roof steel structure; Step 4: According to Step 1 and Step 2, the number and structural dimensions of temporary connecting beams used to connect the roof steel structures of each section during jacking are calculated and each temporary connecting beam is manufactured, wherein a sliding shoe for jacking operation is provided at the bottom of each temporary connecting beam; 2. Assembly and pushing operation Step 5: Arrange an assembly platform on one side of the CL axis. The assembly platform is about 50m long and 4m wide. As shown in the figure, two sliding tracks are laid on the upper chord beam of the C1 and C3 axis trusses. Step 6: Assemble the two main trusses, the sliding shoes and the temporary structure of the first sliding unit and hoist them onto the track on the assembly platform, and then install four hydraulic crawlers on the rear sliding shoes; Step 7: Slide the first unit forward 8m, and then assemble the second steel truss and connect it with the first truss to form the second sliding unit; Step 8: Slide the second sliding unit forward 8m, assemble the third main truss, and connect it with the second truss to form the third sliding unit; Step 9: Similarly, slide all CC-CL axis trusses to the designed positions.

[0024] During the above construction process, in terms of hardware selection and installation, this plan also includes the following: 1. Laying of sliding beams and tracks The use of hydraulic synchronous sliding technology for sliding installation of truss structures requires the continuity of the entire sliding channel, that is, laying sliding beams along the sliding direction as sliding channels. According to the conditions such as the stress of the roof truss structure and the lower concrete frame, the sliding operation plan lays 4 sliding channels on the top of the C1, C2, and C3 axis trusses, in which a set of embedded parts is set every 0.8m on the surface of the concrete beam to fix the sliding track.

[0025] In order to ensure the horizontality of the top surface of the sliding rail and the sliding beam and reduce the sliding friction coefficient, the accuracy of the track installation on site must be guaranteed when the sliding beam and the sliding rail are manufactured and installed. 1) The sliding track uses 43kG hot-rolled rails; 2) The distance between the sliding rails is positioned according to the center position of the support, and the rail positioning error does not exceed 20mm; 3) The track is connected with the track beam by a pressure plate, and the distance between the pressure plates is 0.5m; 4) The pressure plate is used to limit the up and down and left and right directions of the track and is not welded to it; 5) The surface levelness of a single track should be less than L / 1000; 6) The allowable deviation of the height difference at the track segment joint should be less than 1~2mm, and the horizontal deviation should be less than 2mm; 7) The track joints must be securely connected with special track fasteners; 8) When laying tracks, the surface of the concrete beam should be leveled and the surface flatness should be controlled within 10mm; 9) Before the sliding bracket is installed, the bottom plate should be greased with butter, and the upper surface of the sliding track should be greased with butter; 10) To ensure the reliable operation of the crawler clamp, both sides of the track should be kept clean and not greased to avoid the crawler "slipping".

[0026] 2. Slipper design The sliding adopts a large beam to lift the truss, and the steel H350*850*12*19 is used as the sliding shoe under the large beam. Each main truss is equipped with 4 sliding shoes above the track. The welding between the sliding shoe and the truss adopts groove penetration welding, and the weld grade is level 2.

[0027] 3. Sliding push point The sliding push point is the connection node between the hydraulic crawler and the sliding structure, which is used to transmit the horizontal push force of the hydraulic crawler. The sliding push point is set at the structural support. When the hydraulic crawler is used to push the component to slide, a special sliding push point must be set. The design of the push point must be able to effectively transmit the horizontal friction force. The push point ear plate is welded to the steel structure groove, and the weld grade is level 2.

[0028] 4. Uninstall The truss of the incineration area slides at the designed elevation. After sliding into place, it is welded to the reserved corbels on the steel columns and tested to be qualified. Then, the sliding shoes are cut to complete the transfer of structural loads. Then the tracks and equipment are removed to complete the unloading of the entire incineration area.

[0029] 5. Selection of main equipment In this project, according to the on-site construction conditions and the appearance characteristics of the stacked steel structure, the steel structure cumulative hydraulic sliding installation construction technology is adopted. In line with the advancement and innovation of this construction technology, our company mainly uses the following key technologies and equipment: 1) Hydraulic synchronous sliding technology; 2) TJG-600 hydraulic crawler; 3) TJV-30 hydraulic pump source system; 4) YT-1 computer synchronous control system.

[0030] 5.1. Hydraulic crawler configuration According to the sliding process and the reaction force value at the bottom of the support, 8 crawlers are arranged. The horizontal thrust of each hydraulic crawler is 600t (rated top thrust).

[0031] The sliding weight of the truss is 455t, and the friction coefficient is 0.2 (the dynamic friction coefficient is approximately between 0.12 and 0.15). The total horizontal reaction force is 0.2×455t=91t<60×8=480t; the crawler load rate is 91÷480=0.19. The crawler configuration of this project can meet the sliding requirements.

[0032] 5.2. Hydraulic pump source system configuration In this scheme, two 30kW hydraulic pump stations are configured according to the size of the jacking force and the number of crawlers, one for each track. The layout principle of the hydraulic pump station is to be as close to the hydraulic crawler as possible. The hydraulic pump source system provides hydraulic power for the crawler and completes the corresponding actions under the control of various hydraulic valves. In different engineering uses, since the layout of the jacking points and the arrangement of the crawlers are different, in order to improve the versatility and reliability of the hydraulic sliding equipment, the design of the pump source hydraulic system adopts a modular structure. The number of pump sources is configured according to the layout of the jacking points and the number of crawlers, and multiple modules can be combined. Each module is based on a pump source system, which can independently control a group of hydraulic crawlers, and can be expanded to multiple jacking points to meet the needs of actual jacking and sliding projects.

[0033] 5.3. Control system configuration In this scheme, a set of YT1 computer synchronous control and sensor inspection system is configured according to the crawler and pump source system. The number of hydraulic crawlers and hydraulic pump sources increases with the progress of the sliding process. The layout is roughly shown in the figure below. At the same time, the computer control system also needs to be adjusted and changed accordingly.

[0034] The synchronous control system consists of a power control system, a power drive system, a computer control system, etc. It mainly completes the following two control functions: Coordinated control of the movements of cluster crawlers during operation. During the sliding operation, each crawler must coordinate its movements under the control of a computer to create conditions for synchronous sliding.

[0035] The synchronous control between various points is to control the synchronous operation of the crawler through a computer network, so as to keep the synchronous operation of various points of the pushed component to maintain its sliding posture.

[0036] Operators can observe the hydraulic sliding process and related data and (or) issue control instructions through the hydraulic synchronous computer control system human-machine interface in the central control room.

[0037] 6. Quality Control 6.1. Preparation and inspection before pushing Before the structure is pushed, the sliding system and sliding auxiliary equipment should be fully inspected and debugged: Check whether the joints of all valves or hard pipes on the pump station are loose, and check whether the pressure-adjusting spring of the overflow valve is in a completely relaxed state.

[0038] Check whether the cable connection between the pump station starting cabinet and the hydraulic jack is correct.

[0039] Check whether the oil pipe connection between the pump station and the hydraulic jacking cylinder and lifting cylinder is correct.

[0040] Power on the system and check whether the hydraulic pump main shaft rotates in the correct direction.

[0041] When the pump station is not started, manually operate the corresponding buttons in the control cabinet to check whether the solenoid valve and the stop valve are operating normally and whether the stop valve number and the thruster number correspond.

[0042] Check the sensor and gently pull the pull rope sensor of each hydraulic jack to make the corresponding data signal feedback on the computer monitoring screen.

[0043] Inspection before sliding: Start the pump station, adjust a certain pressure (about 5Mpa), telescopic pusher push cylinder and jacking cylinder: check whether the oil pipe connection of cavity A and cavity B is correct; check whether the stop valve can cut off the corresponding cylinder; check whether the inverter can speed up or slow down the extension and retraction speed of the corresponding cylinder when the current changes.

[0044] Preloading: Adjust the pressure of the lifting cylinder and the pushing cylinder (2-3Mpa) so that each lifting cylinder contacts the truss and maintains basically the same stress state, and the pushing cylinder also maintains the same jacking stress state.

[0045] 2. Quality control of the push process Stepped loading and sliding After the system is tested and found to be correct, the formal sliding will begin. After calculation, the extension cylinder pressure (taking into account the pressure loss) and the retraction cylinder pressure required by the hydraulic jacking device are determined.

[0046] When the sliding begins, the extension cylinder pressure of the hydraulic jacking device is gradually increased to 20% and 40% of the required pressure respectively. If everything is normal, it can be continuously loaded to 60%, 80%, 90% and 100% until the structure is separated from the jacking support system.

[0047] After the structural load is completely transferred to the jacking cylinder of the jacking device, the extension pressure of the jacking cylinder is gradually increased to 20% and 40% of the required pressure respectively. If everything is normal, it can continue to be loaded to 60%, 80%, 90%, and 100% until the structure is about to move.

[0048] When the sliding structure is about to move, the sliding propulsion is suspended to maintain the propulsion system pressure. The hydraulic jack, equipment system and structural system are fully inspected. Only when the stability and safety of the overall structure are confirmed to be no problem, can the sliding continue.

[0049] Before formal sliding, the track center deviation, elevation difference, horizontality deviation, diagonal deviation, etc. should be inspected and accepted, and the sliding shoe contact surface and connection reliability should be checked.

[0050] Formal Slip During the hydraulic sliding process, pay attention to observing the pressure and load changes of the equipment system, and keep careful records.

[0051] The pump source pressure value is pre-set according to the designed sliding load, thereby controlling the maximum output thrust and lifting force of the jacking device to ensure the safety of the entire sliding facility.

[0052] The computer control system feeds back the distance signal through the banyan grid sensor to control the error of each thruster within 20mm, thereby controlling the synchronous sliding of the entire sliding unit.

[0053] When maintaining a certain synchronous sliding state, there is basically no lateral horizontal force in the horizontal direction (considered as 5% to ensure safety), and the sliding support system is calculated to be safe under the sliding condition. Transverse blocks are set at the corresponding positions of the sliding units, and the entire sliding process is safe and reliable.

[0054] The thruster is a hydraulic system. Through flow control, the starting and stopping acceleration of the thruster is almost zero, and the impact force on the thrust support is very small.

[0055] During the sliding process, close attention should be paid to the working conditions of the jacking support, hydraulic jacking device, hydraulic pump source system, computer synchronous control system, sensor detection system, etc.

[0056] Before using the on-site wireless intercom, you must report to the project command center and it can only be used after a clear reply. The communication tools are kept by a designated person to ensure smooth signal flow.

[0057] The above are only embodiments provided for the present application and are not intended to limit the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. The inverted sliding assembly method of the roof steel structure of a large-scale waste incineration power plant is characterized by:

1. Preliminary measurement and design; Step 1: Measure the distance between the columns used to install the roof steel structure and clearly divide the roof steel structure into several sections; Step 2: Design the connection structure between each section of the roof steel structure and the columns; Step 3: According to the size requirements of step 1, step 2 and design drawings, deepen the structural dimensions of each section of the roof steel structure and make each section of the roof steel structure; Step 4: According to Step 1 and Step 2, the number and structural dimensions of temporary connecting beams used to connect the roof steel structures of each section during jacking are calculated and each temporary connecting beam is manufactured, wherein a sliding shoe for jacking operation is provided at the bottom of each temporary connecting beam; 2. On-site segmental assembly and single-frame jacking operation of the roof steel structure; Step 5: Set a flat platform between the columns on the starting end of the jacking operation; Step 6: along the route of the pushing operation, at least two sliding rails are set up between the columns involved and pushers are set up, and synchronizers are set between adjacent pushers; Step 7: Connect the sections of the single-frame roof steel structure with temporary connecting beams on the assembly platform in the assembly order to form a single-frame roof steel structure, wherein the temporary connecting beams are arranged on the top of each section of the roof steel structure, and when adjacent sections of the frame steel structure are connected using the same temporary connecting beam, a gap is formed at the bottom of the temporary connecting beam, and the gap is used for the columns to pass through and put the roof steel structure in place; Step 8: Connect the sliding shoe at the bottom of the temporary connecting beam in step 7 to the jacking device; push the first roof steel structure forward 8m through the jacking device and synchronizer; Step 9. Repeat step 7 to assemble the second roof steel structure and connect it to the first roof steel structure; Step 10: Repeat step 8 to push the second roof steel structure forward 8m; Step 11: Repeat steps 7 to 10 until all single-frame roofs slide to the designed position; Step 12: Weld the roof steel structure trusses and columns of each section together according to the connection structure described in step 2, remove the crawler, synchronizer, track and other temporary measures, and the entire sliding process is completed.

2. According to claim 1, the inverted sliding assembly method of the roof steel structure of a large-scale waste incineration power plant is characterized by: In step 2, the connection structure used to connect each section of the roof steel structure to the column refers to the corbel structure reserved at the top of the column.

3. The inverted sliding assembly method of the roof steel structure of a large-scale waste incineration power plant according to claim 1 is characterized by: In step 4, the temporary connecting beam used to connect the various sections of the roof steel structure during jacking includes a shoulder pole beam at the top and roof steel structure pulling columns and sliding shoe supports respectively arranged at the bottom of the shoulder pole beam. There are multiple roof steel structure pulling columns, and several of them are evenly spaced along the length direction of the bottom of the shoulder pole beam. They are used to connect the shoulder pole beam with the various sections of the roof steel structure, and the sliding shoe supports are used to connect the sliding shoe and the shoulder pole beam.

4. According to claim 1, the inverted sliding assembly method of the roof steel structure of a large-scale waste incineration power plant is characterized by: In step 7, before the jacking operation, reinforcing ribs or rib plates are arranged along the webs of each section of the roof steel structure to strengthen the rigidity of each section of the roof steel structure so as to avoid deformation during the jacking operation.

5. According to claim 1, the inverted sliding assembly method of the roof steel structure of a large-scale waste incineration power plant is characterized by: In step 11, during the jacking process, when a column is encountered that obstructs the path of the roof steel structure, the column is cut and a gap is formed so that the roof steel structure can pass through the gap smoothly.

6. The inverted sliding assembly method of the roof steel structure of a large-scale waste incineration power plant according to claim 1 is characterized by: In step 6, a track pressure plate is embedded between the track and the column; in step 4, arc-shaped limit baffles are symmetrically set at the bottom of the sliding shoe and the track is placed between the limit baffles on both sides to avoid jamming between the sliding shoe and the track during the pushing process.

7. The inverted sliding assembly method of the roof steel structure of a large-scale waste incineration power plant according to claim 1 is characterized by: In step 6, the pusher refers to a self-locking hydraulic crawler, which is directly rigidly connected to the roof steel structure without using a reaction frame, and then forms a reaction force by clamping the track to achieve the sliding forward of the roof steel structure.

8. The inverted sliding assembly method of the roof steel structure of a large-scale waste incineration power plant according to claim 1 or 7 is characterized by: The push-sliding operation adopts a graded loading and sliding strategy, including a. When the sliding starts, the extension pressure of the lifting cylinder of the jacking device is gradually increased to 20% and 40% of the required pressure. If everything is normal, the pressure is continuously increased to 60%, 80%, 90% and 100% until the structure is separated from the jacking support system. b. After the structural load is completely transferred to the lifting cylinder of the jacking device, the extension pressure of the jacking cylinder is gradually increased to 20% and 40% of the required pressure respectively. If everything is normal, continue to load to 60%, 80%, 90% and 100% until the structure is about to move.

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