Large roof grid structure air segmentation partial block hoisting and dismantling process

Abstract

The invention provides a large roof grid structure aerial segmentation partial block hoisting and dismantling process which comprises the following steps: dividing a large roof grid into a plurality of aerial segmentation units along criss-cross segmentation lines according to the area of the large roof grid and the surrounding positions where hoisting equipment can be placed; calculating the self-weight load of the frame body of each aerial segmentation unit, and selecting hoisting equipment by taking the maximum value of the self-weight load of the frame body as a reference; and a plurality of aerial segmentation units with the same intersection corner point are subjected to aerial segmentation and block hoisting one by one by synchronously applying pre-jacking force. According to the method, through the steps, the large roof grid structure is accurately divided, the pre-jacking force is applied to the multiple aerial division units to transmit the construction load to the supporting scaffold, the block hoisting mode is adopted, the construction safety is guaranteed, and the construction progress is accelerated.

Description

Technical Field

[0001] The present application relates to the technical field of dismantling large-scale roof grid structures, and in particular to a process for hoisting and dismantling a part of a large-scale roof grid structure by dividing it in the air. Background Art

[0002] In recent years, due to technological updates and quality improvement of large factories, it is necessary to dismantle the original large roof grid structure. After the equipment is updated and installed, the large roof grid structure can be installed. At present, some production plants must be updated and renovated without stopping production due to production needs. When the roof truss is dismantled and replaced, some indoor machinery and equipment are still in operation, and there is no space for large-scale construction platforms such as operating scaffolding. Some factories are surrounded by dense buildings (structures). When the roof grid is dismantled, there may be no place to place lifting equipment in several directions next to the factory truss to be dismantled.

[0003] At present, the dismantling of large roof grid structures generally adopts the method of setting up a full-height support frame work platform, and the local equipment position adopts the steel-type span frame work platform, and the roof grid support points are divided into grids and the rods are dismantled one by one in the air. The roof grid is a spatial structure formed by connecting vertical rods and longitudinal and transverse rods through nodes. The grid is dismantled one by one by the grid, and the rigidity of the frame is gradually weakened, and the force model has changed. This method has high labor intensity, low work efficiency, many safety hazards, and poor safety performance; the full-height support frame and steel-type span frame require a lot of turnover materials, slow construction speed, and high construction cost. Summary of the invention

[0004] The present application provides a process for hoisting and dismantling a part of a large roof grid structure by dividing it in the air into multiple units, with the supporting scaffolding bearing the construction load, thus achieving the purpose of dismantling and hoisting the aerial division, and the construction is efficient and convenient.

[0005] The present application provides a large-scale roof grid structure aerial division partial block hoisting and dismantling process, which includes: a dismantling process for aerial division of a large-scale roof grid and block hoisting; the dismantling process includes the following steps: Step 1: Divide the large roof grid into a plurality of aerial division units along crisscrossing division lines according to the area of ​​the large roof grid and the surrounding positions where the lifting equipment can be parked; Step 2: Calculate the deadweight load of each aerial segmentation unit, and select the lifting equipment based on the maximum deadweight load of the frame; Step 3: Multiple aerial segmentation units with the same intersection corner point are segmented and lifted one by one in the air by synchronously applying pre-jacking force: a. Erect a plurality of support scaffolds vertically upward from the ground. A support plate group is laid flat on the top of each support scaffold, and the plurality of support scaffolds are respectively located directly below the intersections of the criss-cross dividing lines; b. Assemble a plurality of jacks on each support plate group. Each aerial segmentation unit is supported by at least two jacks applying pre-lifting force to support the lower spherical joints of the grid; c. The lifting equipment applies an equal pre-lifting force to an aerial segmentation unit located at the outermost corner; d. Cut off the grid connecting members along the corresponding dividing line, so that an aerial segmentation unit located at the outermost corner is divided into an independent geometrically invariant frame; e. The lifting equipment hoists the divided geometrically invariant frame to the ground and disassembles it on the ground; f. Apply pre-lifting force to an adjacent aerial segmentation unit in sequence and then perform segmentation and hoisting; among them, When any aerial segmentation unit is divided into an independent geometrically invariant frame, a plurality of jacks support the circumferentially adjacent plurality of aerial segmentation units, and transfer the construction load to the corresponding support scaffolds.

[0006] In this application, by dividing the dividing lines, the large-scale roof grid structure is divided into a plurality of aerial segmentation units, and a plurality of aerial segmentation units are applied with pre-lifting force by low-cost jacks, and the construction load is conducted to the support scaffolds, ensuring construction safety, the quickness of block hoisting, and reducing construction costs. In a specific feasible implementation scheme, when dividing the large-scale roof grid into a plurality of aerial segmentation units along the criss-cross dividing lines, the support area for erecting the support scaffolds is positioned according to the vertical avoidance space. According to the installation position of the on-site equipment, the support scaffolds are installed in an avoidance manner, and the demolition of the large-scale roof grid structure is completed without affecting the normal production capacity.

[0007] In a specific feasible implementation scheme, the strength of the concrete ground perpendicular to the support area is not less than 120 KPa. Ensure the ground strength so that the support scaffolds bear the construction load.

[0008] In a specific feasible implementation scheme, the support plate group includes: square timbers laid flat on the top of the support scaffolds, and bamboo plywood forms covering the square timbers. It has a top plane and remarkable support effect.

[0009] In a specific feasible implementation scheme, when the plurality of support scaffolds are respectively located directly below the intersections of the criss-cross dividing lines, a plurality of jacks on the same support plate group support four aerial segmentation units synchronously. Meet the support effect in various on-site layouts.

[0010] In a specific feasible implementation, when multiple of the support scaffolds are spaced directly below the dividing line in the same longitudinal direction, multiple jacks on the same support plate group support two aerial dividing units synchronously. The cutting line is accurately divided according to the equipment distribution, the position of the erected support scaffolds, and the placement orientation of the lifting equipment.

[0011] In a specific feasible implementation, the grid corner part or the grid side part of each aerial dividing unit is supported by two jacks at the lower spherical node of the corresponding position of the grid. There are two support points to prevent the risk caused by the failure of a certain support.

[0012] In a specific feasible implementation, when the aerial dividing unit to be segmented is divided in the air, the multiple end points of the hoisting steel wire rope of the lifting equipment are evenly distributed and connected to the multiple lower spherical nodes of the grid of the aerial dividing unit one by one, and the aerial dividing unit to be segmented is in a stress state of balanced pre-lifting force. The lifting force is applied equally to ensure the safety when cutting the grid connecting members.

[0013] In a specific feasible implementation, multiple aerial dividing units are segmented and hoisted in sequence according to a predetermined order. Segmentation and hoisting are carried out in an orderly manner according to the process requirements to improve the construction safety. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of an embodiment of the process for aerial segmentation and local block hoisting and demolition of a large roof grid structure provided by this application; Figure 2 It is a schematic diagram of the structure of the support plate group provided by the embodiment of this application.

[0015] Reference Numerals in the Drawings: Structural column - 100, Lifting equipment - 200, Dividing line - 300, Support area - 400, Support point - 410; Support scaffold - 10, Square timber - 20, Bamboo plywood form - 30, Jack - 40, Lower spherical node of the grid - 50. Detailed Description of the Embodiment

[0016] To make the purpose, technical solution and advantages of the present disclosure clearer and more understandable, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0017] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of this specification should have the ordinary meanings understood by those of ordinary skill in the art to which this disclosure pertains. The "first", "second" and similar terms used in one or more embodiments of this specification do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0018] To facilitate the understanding of the large roof grid structure aerial segmentation and partial block hoisting and demolition process provided by the embodiments of this application, first, its application scenario will be described. At present, when demolishing a large roof grid structure, a full-span support frame working platform is generally erected, and a cross-span frame working platform made of steel sections is erected at the local equipment position. Each member is demolished in the air according to the partition grid of the roof grid support points. The roof grid is a space structure formed by vertical members and longitudinal and transverse members connected through nodes. When demolishing each member by partition grid, the stiffness of the frame gradually weakens and the force model changes. This method has a high labor intensity, low work efficiency, many potential safety hazards, and poor safety performance; erecting a full-span support frame and a cross-span frame made of steel sections requires a large amount of turnover materials, slow construction speed, and high construction cost. In view of this, this application provides a large roof grid structure aerial segmentation and partial block hoisting and demolition process. By dividing into multiple aerial segmentation units and having the support scaffold bear the construction load, the purpose of aerial segmentation, disintegration and hoisting is achieved, and the construction is efficient and convenient.

[0019] Refer to Figure 1As shown in the figure, the large roof grid structure aerial segmentation and partial block hoisting and demolition process provided by this application includes: a demolition process for aerial segmentation and block hoisting of the large roof grid; in this application, it mainly aims at the industrial factory building with a large roof grid structure that needs to demolish the original roof structure due to technological transformation and update. Due to process and continuous production reasons, some need to be renovated without stopping production. Due to factors such as the stacking of production equipment in the factory building, it is very difficult to set up a full-span scaffolding operation platform at present, and the construction period is long when using the method of setting up a full-span color scaffolding, which is not conducive to production during renovation. Moreover, because the large roof grid structure is a space structure, when each rod is demolished one by one, the stiffness of the frame gradually weakens, the force-bearing model changes, and the danger is relatively high. At the same time, in the actual scenario, the surrounding buildings (structures) of some factory buildings are relatively dense. When demolishing the roof grid, there may be no position for placing the lifting equipment in some directions beside the roof truss of the factory building to be demolished. The demolition process in this application can avoid according to the equipment installation area of the factory building, accurately divide the cutting line based on data such as the placement area of the lifting equipment 200, and adopt the method of block demolition to conduct aerial segmentation and lifting of the large roof grid structure under the condition of non-stop production, ensuring that the stiffness of the frame has good support, greatly simplifying the construction process, and improving construction safety.

[0020] Specifically, the demolition process in this application includes the following steps: S1. According to the area of the large roof grid and the positions where the lifting equipment 200 can be parked around, divide the large roof grid into multiple aerial segmentation units along the crisscross cutting lines 300; by measuring the length and width of the large roof grid structure, obtain the area of the large roof grid structure, and combine the positions where the lifting equipment 200 can park and work to accurately divide the large roof grid structure.

[0021] S2. Calculate the self-weight load of the frame of each aerial segmentation unit, and select the lifting equipment 200 based on the maximum value of the self-weight load of the frame; during the process of dividing the cutting line, when combined with the placement positions of the internal equipment in the factory building and it is impossible to meet the same size of multiple aerial segmentation units, based on the aerial segmentation unit with the maximum value of the self-weight load of the frame, when selecting the lifting equipment 200, it is necessary to ensure that the lifting capacity is greater than the maximum value of the self-weight load to improve the safety of hoisting performance.

[0022] S3. Multiple aerial segmentation units with the same intersection corner point are segmented and block-hoisted in the air one by one by applying pre-top force synchronously: a. Erect multiple support scaffolds 10 vertically upward from the ground. The top of each support scaffold 10 is paved with a support plate group, and multiple support scaffolds 10 are located directly below the cross of the crisscross cutting lines 300 one by one ( Figure 1As shown in [reference]; when dividing the large roof grid into multiple aerial division units along the crisscross dividing lines 300, determine the support area 400 for erecting the support scaffold 10 according to the vertical avoidance space. According to the on-site equipment installation position, install the support scaffold 10 in an avoidance manner, and complete the demolition of the large roof grid structure without affecting the normal production capacity. Moreover, the strength of the concrete ground perpendicular to the support area 400 is not less than 120 KPa. Ensure the ground strength so that the support scaffold 10 can bear the construction load.

[0023] b. Assemble multiple jacks 40 on each support plate group. Each aerial division unit is supported by at least two jacks 40 applying pre-lifting force to the lower spherical nodes 50 of the grid; referring to Figure 2 As shown in [reference], the support plate group includes: square timbers 20 laid flat on the top of the support scaffold 10, and bamboo plywood forms 30 covering the square timbers 20. Thus, it has a flat top surface and remarkable support effect. Using jacks 40 as the support load tools greatly reduces the inconvenience of erecting a full hall scaffold and significantly reduces the demolition cost. Moreover, to ensure construction safety, the grid corner parts or grid side parts of each aerial division unit are supported by two jacks 40 at the corresponding positions of the lower spherical nodes 50 of the grid. There are two support points 410 to prevent the danger caused by support failure.

[0024] c. The lifting equipment 200 applies an equal pre-lifting force to an aerial division unit located at the outermost corner; starting from an aerial division unit at the outermost corner, perform demolition positioning along the corresponding crisscross dividing line 300. The four endpoints of the lifting wire ropes of the lifting equipment 200 are evenly distributed and are respectively connected to multiple lower spherical nodes 50 of the aerial division unit. The aerial division unit to be divided is in a stress state of balanced pre-lifting force. Apply an equal lifting force to ensure safety when cutting the grid connecting members.

[0025] d. Cut the grid connecting members along the corresponding dividing line 300 to divide an aerial division unit located at the outermost corner into an independent geometrically invariant frame; after removing the grid connecting members on the connecting structural column 100 and the crisscross dividing line 300, the aerial division unit at the starting position forms a geometrically invariant frame.

[0026] e. The lifting equipment 200 hoists the divided geometrically invariant frame to the ground and disassembles it on the ground; the signalman at the lifting point cooperates to command the lifting equipment 200 to slowly hoist. When it is hoisted into the air, the signalman on the ground takes over the command and slowly hoists it to the ground. The operators disassemble and remove each small unit on the ground.

[0027] f. Apply pre-lifting force to adjacent aerial segmentation units in sequence and then perform segmentation and hoisting; among them, multiple aerial segmentation units are segmented and hoisted in a predetermined order. Segment and hoist in an orderly manner according to the process requirements to improve construction safety.

[0028] Figure 1 When it shows that multiple support scaffolds 10 are located directly below the intersections of the criss-crossing segmentation lines 300 one by one, multiple jacks 40 on the same support plate group support four aerial segmentation units synchronously. Meet the support effect in various on-site layouts. The support area 400 is located at the intersection of the segmentation line 300. The multiple support points 410 distributed in the support area 400 are the positions where the jacks 40 support the lower spherical nodes 50 of the grid. And each aerial segmentation unit has at least two support points 410 to prevent support failure. At the same time, when the grid connecting members in two directions of any aerial segmentation unit are connected and fail, the jacks 40 at the support points 410 ensure that the overall roof grid structure still has strong stiffness.

[0029] To fully understand the large roof grid structure aerial segmentation and partial block hoisting and demolition process in this application, this application is applied in a certain waste incineration power plant. Due to the expansion of the factory building and the addition of equipment in the second-phase project, it is required to demolish the roof and the attached gable enclosure structure (including exterior wall panels, some steel columns, etc.) of the first-phase main factory building of the original waste incineration power plant under the condition of non-stop production, and a new boiler is added in the demolition area. The total projected size of the original roof grid is 51.8m×55.5m, the structural form is a regular square pyramid bolted spherical node grid, supported on all four sides of the lower chord, the elevation of the bottom surface of the grid support is 37.00m, and the height between the center lines of the upper and lower chords of the grid is 1.60m to 2.83m.

[0030] The existing first-phase main factory building contains equipment such as induced draft fans, dust collectors, acid scrubbers, incinerators, and waste heat boilers. The second-phase steam turbine house is expanded at the expansion end (west side) of the first-phase steam turbine house. Steam turbines, generators and their auxiliary equipment are arranged in the expanded steam turbine house. The first-phase waste incineration power generation has been in production for many years. The construction unit requires expansion without stopping production. A new incineration line and a set of steam turbine generator units are added on the west side of the first-phase steam turbine house in the second-phase expansion.

[0031] The design load of the large roof grid structure of this factory building is 15kN / ㎡. The specific demolition construction process is as follows: Demolition process of the gable enclosure system: Erect double-row steel pipe scaffolds on the exterior wall → Demolish the gable gutter, purlins, etc. → Demolish the enclosure structures such as exterior wall panels and windows → Demolish the exterior wall scaffolds → Demolish the gable wind columns → Clean the site.

[0032] Demolition process of the roof grid structure and steel columns: Erect support scaffolds 10 → Demolish the roof panels → Demolish the primary and secondary purlins → Support, segment, and hoist the roof grid → Disassemble the roof truss on the ground → Demolish the steel beams and steel columns → Clean the site.

[0033] When specifically dividing the criss-cross cutting lines, take the unit plate. Self-weight of the roof grid members: 19.5 kg / ㎡ × 9.85×10-3 kN / kg = 0.193 kN / ㎡.

[0034] The nearest No. 1 and No. 2 aerial division units, area: 18 m × 25.9 m = 466.2 ㎡, self-weight: 466.2 ㎡ × 0.193 kN / ㎡ = 90.0 kN The middle No. 3 and No. 4 aerial division units, area: 21 m × 25.9 m = 543.9 ㎡, self-weight: 543.9 ㎡ × 0.193 kN / ㎡ = 105.0 kN The farthest No. 5 and No. 6 aerial division units, area: 16.5 m × 25.9 m = 427.4 ㎡, self-weight: 427.4 ㎡ × 0.193 kN / ㎡ = 82.5 kN The most unfavorable condition 1: (Load partial coefficient is taken as 1.35) When removing the No. 1, No. 2, and No. 3 aerial division units, the original connecting rods in two directions of the No. 4 aerial division unit disappear, and the original connecting rod in one direction of the No. 5 aerial division unit disappears. The supporting force of the adjacent rods of the No. 5 aerial division unit will be partially weakened. Two support points are respectively set in two directions of the No. 4 aerial division unit, and two support points are respectively set for the No. 5 and No. 6 aerial division units.

[0035] The maximum load of the jack 40 at the support point 410: 1.35×(105.0 kN÷4)÷2 = 17.8 kN The maximum load transmitted from the support point 410 to the support scaffold 10: 17.8 kN÷(2 m×2 m) = 4.5 kN / ㎡ < 15 kN / ㎡, meeting the requirements.

[0036] The most unfavorable condition 2: (Load partial coefficient is taken as 1.35) When removing the No. 1, No. 2, No. 3, No. 4, and No. 5 aerial division units, one corner of the No. 6 aerial division unit is suspended, and the supports in two directions are lost. Two support points are set in each direction.

[0037] The maximum load of the jack 40: 1.35×(90.0 kN÷4)÷2 = 15.2 kN The load transmitted from the support point 410 to the support scaffold 10: 15.2 kN÷(2 m×2 m) = 3.8 kN / ㎡ < 15 kN / ㎡, meeting the requirements.

[0038] When specifically selecting the lifting equipment 200, the distance from the rotation center of the lifting equipment 200 to the building side line is 2.5 m, and the pier can extend into the building. The self-weight load of the aerial segmentation unit is less than 298 kN, and it is lifted by 4 steel wire ropes with a horizontal included angle of 30 degrees. The sling is selected as a 6×19 steel wire rope with a diameter of 22 mm and a length of 100 m, with a self-weight of 165.8 kg (1.63 kN).

[0039] When using a crawler crane for hoisting, the dynamic coefficient is taken as 1.3.

[0040] The most unfavorable condition 1 (when hoisting the aerial segmentation units numbered 3 and 4): (105.5 kN + 1.63 kN) × 1.3 = 139.3 kN = 14.2 T Operating distance: 2.5 + 18 + 21 / 2 = 31.0 m The most unfavorable condition 2 (when hoisting the aerial segmentation units numbered 5 and 6): (82.5 kN + 1.63 kN) × 1.3 = 109.4 kN = 11.1 T Operating distance: 2.5 + 18.0 + 21.0 + 16.5 / 2 = 49.75 m Select a 200-ton Sany SCC2000 crawler crane, and its lifting parameters: fixed auxiliary boom FJ working condition, counterweight 85 T. Main boom length 52.5 m, auxiliary boom length 19 m; working radius 34 m, lifting weight 15.4 tons; working radius 50 m, lifting weight 11.2 tons, meeting the lifting capacity requirements.

[0041] In this application, by dividing the dividing line 300, the large roof space frame structure is divided into multiple aerial segmentation units, and multiple aerial segmentation units are applied with preloading force by low-cost jacks 40, and the construction load is transmitted to the support scaffold 10 to ensure construction safety, the quickness of block lifting, and reduce construction costs. Those of ordinary skill in the art should understand that the discussion of any above embodiment is only exemplary, and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples; under the idea of the present disclosure, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of one or more embodiments of the above specification, which are not provided in detail for the sake of brevity.

[0042] In addition, for the sake of simplicity of explanation and discussion, and in order not to make one or more embodiments of this specification difficult to understand, well-known power / ground connections of other components may or may not be shown in the accompanying drawings. Further, the devices may be shown in block diagram form in order to avoid making one or more embodiments of this specification difficult to understand, and this also takes into account the fact that details regarding the implementation of these block diagram devices are highly dependent on the platform on which one or more embodiments of this specification are to be implemented (i.e., these details should be entirely within the understanding of those skilled in the art). In cases where specific details are set forth to describe exemplary embodiments of the present disclosure, it will be apparent to those skilled in the art that one or more embodiments of this specification may be implemented without these specific details or with variations of these specific details. Accordingly, these descriptions should be regarded as illustrative rather than restrictive.

[0043] One or more embodiments of this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of this specification shall be included within the scope of protection of this disclosure.

Claims

1. A process for removing a large roof grid structure by splitting it in the air and hoisting it in blocks, comprising a process for splitting a large roof grid in the air and hoisting it in blocks; characterized in that: The removal process comprises the following steps: According to the area of ​​the large roof grid and the surrounding positions where the lifting equipment can be parked, the large roof grid is divided into a plurality of aerial division units along crisscrossing division lines; Calculate the deadweight load of each aerial division unit and select the lifting equipment based on the maximum deadweight load of the frame; Multiple aerial segmentation units with the same intersection point are segmented and lifted one by one in the air by synchronously applying pre-jacking force: a. erecting a plurality of supporting scaffolds vertically upward from the ground, with a support plate group laid flat on the top of each supporting scaffold, and the plurality of supporting scaffolds correspondingly being located directly below the cross intersection of the criss-crossing dividing lines; b. Multiple jacks are installed on each of the support plate groups, and each aerial segmentation unit is supported by at least two jacks to apply pre-loading force to the ball node at the bottom of the grid; c. The lifting device applies a pre-lifting force to an aerial segmentation unit located at the outermost corner; d. Cutting off the grid connection rods along the corresponding dividing lines, so that an aerial dividing unit located at the outermost corner is divided into an independent geometrically invariant frame; e. The lifting equipment hoists the segmented geometrically invariant frames to the ground and disassembles them on the ground; f. Apply pre-lifting force to the adjacent aerial segmentation units one by one, and then segment and lift them; wherein, When any aerial segmentation unit is divided into independent geometrically invariant frames, multiple jacks are used to support multiple circumferentially adjacent aerial segmentation units, and the construction load is transferred to the corresponding supporting scaffolding.

2. The process for hoisting and dismantling the local blocks of the aerial division of the large roof grid structure according to claim 1 is characterized in that: When the large roof grid is divided into a plurality of aerial division units along the crisscrossing division lines, Locate the support area for erecting the supporting scaffolding based on the vertical avoidance space.

3. The process for hoisting and dismantling the local blocks of the aerial division of the large roof grid structure according to claim 2 is characterized in that: The concrete floor strength perpendicular to the support area is not less than 120KPa.

4. The process for hoisting and dismantling the local blocks of the aerial division of the large roof grid structure according to claim 2 is characterized in that: The support plate group comprises: square wood laid flat on the top of the support scaffold, and bamboo glue formwork covering the square wood.

5. The process for hoisting and dismantling the local blocks of the aerial division of the large roof grid structure according to claim 2 is characterized in that: When a plurality of the supporting scaffolds are located one by one directly below the cross intersection of the crisscrossing dividing lines, A plurality of jacks on the same supporting plate group support the four aerial segmentation units synchronously.

6. The process for lifting and dismantling a large-scale roof grid structure by aerial segmentation of a local block according to claim 1 is characterized in that: The corner points or side edges of the grid of each aerial segmentation unit are supported by two jacks at the corresponding lower ball nodes of the grid.

7. The process for lifting and dismantling the local blocks of the aerial division of the large roof grid structure according to claim 1 is characterized in that: When treating the air segmentation unit of the block as air segmentation, The multiple end points of the lifting wire rope of the lifting equipment are evenly distributed and connected to the multiple lower ball nodes of the grid of the aerial segmentation unit in a one-to-one correspondence, and the aerial segmentation unit to be divided is in a stress state of balancing the pre-lifting force.

8. The process for lifting and dismantling the local blocks of the aerial division of the large roof grid structure according to claim 7 is characterized in that: Multiple aerial segmentation units are segmented and hoisted in sequence according to a predetermined order.

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