Suspended formwork system for overhead floor of granulation tower and construction method for overhead floor of ultra-high granulation tower

Abstract

The present invention relates to a hanging formwork system for the overhead floor of a granulation tower and a construction method for the overhead floor of an ultra-high granulation tower. The hanging formwork system is processed in modules on the ground. After processing, it is successively hoisted onto the rigid beam steel skeleton at the predetermined position. After connecting and fixing each module to form an integral body and setting structural tie points, steel bars are tied on the hanging formwork system and the overhead floor is poured. After the pouring of the overhead floor is completed, the hanging formwork modules are successively removed and lowered, thereby completing the construction of the overhead floor. The hanging formwork system of the present invention is fabricated on the ground, reducing high-altitude operations and improving the construction safety. The modules of the hanging formwork system are segmented according to the diameter of the granulation tower and the working performance of the tower crane, improving the utilization rate of machinery. Using this construction method, the construction speed is fast, the construction period is shortened, a large amount of turnover tools can be saved, high-altitude suspended operations are reduced, the construction difficulty is lowered, and the construction quality is improved.

Description

Technical Field

[0001] The present invention relates to a construction technology for granulation towers, specifically to a hanging formwork system for the overhead layer of a granulation tower and a construction method for the overhead layer of an ultra-high granulation tower. Background Art

[0002] A granulation tower is a key facility in tower granulation technology. The internal structure of the granulation tower is relatively complex and the construction difficulty is high. Especially, the overhead structure layer inside the tower is close to the upper part of the tower top, and the overhead height exceeds 50 meters. The overhead layer of the granulation tower is a double-layer plate structure, and the two sides are stiffening beams. In the construction of the overhead layer of the granulation tower, the general method is that after the main body of the granulation tower uses the rigid connection slip formwork system of the inner platform with truss radial beams to slide to the top, the truss inner platform is separated from the slip formwork system and then lowered to the height of the overhead layer. The truss inner platform serves as the operating platform for the construction of the overhead layer. On this platform, the formwork support, steel bar binding and concrete pouring of the overhead layer are carried out. After the construction of the overhead layer is completed, the truss inner platform is unloaded to the ground.

[0003] This method has certain disadvantages: (1) The truss inner platform uses a large amount of materials and has a long installation period; (2) The separation, lowering of the truss inner platform from the slip formwork system after sliding to the top and the removal process of the platform after the construction of the overhead layer are all relatively complex, and there is a lot of high-altitude operation; (3) The truss operating platform has a large area and a large weight, and it is easy to cause safety accidents during various operations. Summary of the Invention

[0004] The purpose of the present invention is to provide a hanging formwork system for the overhead layer of a granulation tower and a construction method for the overhead layer of an ultra-high granulation tower, so as to solve the problems of low construction efficiency, a large amount of high-altitude operation and poor safety caused by using the truss inner platform of the slip formwork system as the operating platform for the construction of the existing overhead layer of the granulation tower.

[0005] The present invention is realized as follows: A hanging formwork system for the overhead layer of a granulation tower is composed of a plurality of hanging formwork modules. The hanging formwork module includes a bottom keel and side keels on both sides. A bottom formwork is laid on the bottom keel, and a hanging keel is arranged between the side keels on both sides. The ends of adjacent two hanging formwork modules are fixedly connected to each other. A connecting keel is arranged at the top of the hanging formwork system, and the connecting keel is connected to the hanging keels of all hanging formwork modules. A number of structural tie points are distributed on the hanging formwork system.

[0006] The side keels at the ends of adjacent two hanging formwork modules are connected and fixed into one body through a connecting keel.

[0007] The structural tie point includes a pull rod and a pull ring arranged at the upper end of the pull rod. The pull rod passes through the bottom formwork, and the upper and lower ends of the pull rod are respectively welded to the hanging keel and the bottom keel. A sleeve is sleeved on the pull rod, and the sleeve is located between the hanging keel and the bottom keel.

[0008] The bottom keel is a grid structure formed by the main keel and the secondary keel.

[0009] The present invention also discloses a construction method for the overhead floor of an ultra-high granulation tower, which includes the following steps.

[0010] a. Use a tower crane to install two fabricated rigid beam steel skeletons to the predetermined positions of the granulation tower silo.

[0011] b. Fabricate and weld the bottom keel and the side keel of the hanging formwork module on the ground inside the granulation tower silo, and install the bottom form on the bottom of the hanging formwork module.

[0012] c. Use a tower crane to hoist the hanging formwork module in sections to the lower part of the rigid beam steel skeleton in sequence, and weld the hanging keel between the side keels on both sides. The hanging keel spans across the upper parts of the two rigid beam steel skeletons.

[0013] d. After all the hanging formwork modules are installed in place, connect two adjacent hanging formwork modules into a whole.

[0014] e. Install the continuous connecting keel to connect all the hanging keels into a whole.

[0015] f. Set up structural tie points on the hanging formwork system. The structural tie points are connected to the silo wall of the silo through steel wires.

[0016] g. Bind the steel bars of the overhead rigid beam and the steel bars of the overhead floor slab between the bottom form and the hanging keel.

[0017] h. Pour the concrete of the overhead floor slab, and the pouring elevation reaches the upper surface of the floor slab.

[0018] i. Support the side form of the rigid beam and the form of the upper layer of the overhead floor, and bind the steel bars of the upper layer of the overhead floor.

[0019] j. Pour the concrete of the rigid beam and the upper layer of the overhead floor.

[0020] k. Remove the hanging formwork module in sections and lower it to the ground in sequence.

[0021] The structural tie point includes a tie rod and a pull ring provided at the upper end of the tie rod. The tie rod passes through the bottom form. The upper and lower ends of the tie rod are respectively welded to the hanging keel and the bottom keel. A sleeve is sleeved on the tie rod, and the sleeve is located between the hanging keel and the bottom keel.

[0022] The hanging formwork system is divided into several modules along the length direction of the rigid beam steel skeleton.

[0023] In step c, when constructing the suspended keel, after initially checking the elevation and axis position of the suspended formwork module, first weld the suspended keels at both ends; after the welding of the suspended keels at both ends is completed, check the elevation and position at each suspended keel position. After the check is correct, weld the suspended keels in the middle part.

[0024] In step d, the side keels at the ends of two adjacent suspended formwork modules are welded and fixed into one body through the connecting keel.

[0025] In step j, before pouring, water the roughened surface inside the stiffening beam and clean up the crushed slag; before pouring the concrete of the upper slab of the overhead floor, the concrete strength of the bottom slab of the overhead floor shall not be lower than 60% of the design strength; after pouring is completed, cure the concrete for not less than 7 days.

[0026] In step k, the suspended formwork modules are integrally removed and lowered to the ground in the order of first installed last removed and last installed first removed.

[0027] In step k, when the skeleton of the suspended formwork module is removed, one end is hoisted by a tower crane and the other end is connected by a chain block. After cutting the structural connection points and the suspended keels, slowly lower the chain block to make the skeleton of the suspended formwork module vertical, and then the tower crane lowers the skeleton of the suspended formwork module to the ground as a whole, and disassembles the skeleton on the ground.

[0028] The bottom keel is a grid structure formed by the main keel and the auxiliary keel.

[0029] The present invention uses a suspended formwork system to construct the overhead floor of the granulation tower. The suspended formwork body is processed in modules on the ground. After being processed, they are successively hoisted onto the stiffening beam steel skeleton at the predetermined position. After connecting and fixing each module into one body and setting the structural connection points, reinforce the steel bars on the suspended formwork system and pour the overhead floor. After the pouring of the overhead floor is completed, the suspended formwork modules are successively removed and lowered, thereby completing the construction of the overhead floor.

[0030] The steel skeleton of the stiffening beam and each hanging formwork module are fabricated and welded on the ground, thus reducing high-altitude operations. The hanging formwork system is fabricated, lifted, installed, removed, and lowered in multiple modules, which can avoid safety accidents caused by excessive weight during the lifting process. The present invention adopts a hanging formwork system, which is carried out after the slip form construction of the silo is completed. The hanging formwork system is hoisted by a tower crane and does not need to be lifted by the slip form system, thereby reducing the difficulty of slip form construction. Moreover, the hanging formwork system is relatively simple in structure compared with the truss inner platform, with a short fabrication and installation cycle. The lifting, lowering, and removal of the hanging formwork system are relatively simple. The hanging formwork system only needs to cover the rectangular overhead floor area and does not need to cover the entire interior of the silo like the truss inner platform, thus greatly saving materials and reducing the overall mass. The hanging formwork system reduces the deflection value of the formwork system through structural tie points and can ensure the levelness of the overhead floor during pouring.

[0031] The present invention can reduce high-altitude operations during the construction of the overhead floor, improve construction efficiency, and enhance safety during the construction process. Brief Description of the Drawings

[0032] Figure 1 It is a sectional view of the overhead floor of the granulation tower.

[0033] Figure 2 It is a cross-sectional view of the hanging formwork module of the present invention.

[0034] Figure 3 It is a longitudinal sectional view of the hanging formwork module of the present invention.

[0035] Figure 4 It is a plan view of the division of the hanging formwork module of the present invention.

[0036] Figure 5 It is a connection structure diagram of adjacent formworks of the hanging formwork of the present invention.

[0037] Figure 6 It is a structure diagram of the structural tie point of the present invention.

[0038] Figure 7 It is an overall layout diagram of the hanging formwork system of the present invention.

[0039] Figure 8 It is a hoisting demonstration diagram of the hanging formwork module of the present invention.

[0040] Figure 9 It is a demonstration diagram after the hanging formwork of the present invention is installed.

[0041] In the figure: 1. Granulation tower overhead floor; 2. Main keel; 3. Secondary keel; 4. Side keel; 5. Connecting keel; 6. Suspended keel; 7. Tie keel; 8. Structural connection point; 9. Steel wire rope; 10. Granulation tower silo; 1-1. Stiffening beam; 1-2. Overhead floor bottom plate; 1-3. Overhead floor upper plate; 8-1. Tie rod; 8-2. Pulling ring; 8-3. Sleeve. Specific implementation mode

[0042] As Figure 1 shown, the granulation tower overhead floor 1 is a hollow structure. The overhead floor includes the stiffening beams 1-1 on both sides, as well as the overhead floor bottom plate 1-2 and the overhead floor upper plate 1-3 between the two stiffening beams 1-1. And there is an upturned beam on the upper part of the stiffening beam 1-1. The overhead floor is located inside the granulation tower silo 10 and near the top of the tower. It has a relatively high height and a large span, and has a certain difficulty in construction. The present invention is a method for constructing the ultra-high granulation tower overhead floor 1 by using a suspended formwork system.

[0043] The suspended formwork system for the granulation tower overhead floor of the present invention is composed of a number of suspended formwork modules. The suspended formwork modules are as Figure 2 , Figure 3 shown. The suspended formwork module includes a bottom keel and side keels 4 on both sides. A bottom formwork is laid on the bottom keel, and a suspended keel 6 is arranged between the side keels 4 on both sides. The ends of adjacent two suspended formwork modules are fixedly connected to each other. A tie keel 7 is arranged at the top of the suspended formwork system. The tie keel 7 is connected to the suspended keels 6 of all suspended formwork modules. A number of structural connection points 8 are distributed on the suspended formwork system.

[0044] As Figure 5 shown, between adjacent two modules, the side keels 4 at the ends of the two modules are welded and fixed into one body through the connecting keel 5. Three connecting keels 5, namely the upper, middle and lower connecting keels, are welded between the two side keels 4, so as to firmly fix the adjacent two modules together.

[0045] As Figure 6 shown, the structural connection point includes a tie rod 8-1 and a pulling ring 8-2 arranged at the upper end of the tie rod 8-1. The tie rod 8-1 passes through the bottom formwork. The upper and lower ends of the tie rod 8-1 are respectively welded to the suspended keel 6 and the bottom keel. A sleeve 8-3 is sleeved on the tie rod 8-1. The sleeve 8-3 is located between the suspended keel 6 and the bottom keel.

[0046] During use, the pulling ring 8-3 is connected to the wall of the granulation tower silo 10 through the steel wire rope 9, and the steel wire rope 9 is in a tensioned state. The pulling ring 8-3 is subjected to a pulling force, and the structural connection point 8 conducts the pulling force to the suspended keel 6 and the bottom keel, so as to control the vertical deformation displacement of the position of the structural connection point 8.

[0047] Among them, the bottom keel is a grid structure formed by the main keel and the secondary keel. The bottom keel of the grid structure has good stiffness and strength, thus reducing deformation during use.

[0048] The bottom formwork is made of stainless steel and is laid on the bottom keel. It serves as the bottom formwork of the overhead floor when pouring the overhead floor subsequently.

[0049] The construction method of the present invention specifically includes the following steps.

[0050] a. Use a tower crane to install the two fabricated rigid beam 1-1 steel skeletons to the predetermined positions of the granulation tower silo 10.

[0051] The rigid beam 1-1 steel skeleton is made of I-beams, and the rigid beam 1-1 steel skeleton is processed and fabricated on the ground inside the granulation tower silo 10. After fabrication, it is lifted by a tower crane to the predetermined position of the rigid beam 1-1 and fixedly installed on the granulation tower silo 10. The heights and positions of the two rigid beam 1-1 steel skeletons are determined according to the drawings.

[0052] The two rigid beam 1-1 steel skeletons are horizontally arranged and parallel to each other. The two ends of the rigid beam 1-1 steel skeleton are fixedly installed on the silo wall of the granulation tower silo 10. The area between the two rigid beam 1-1 steel skeletons is the designed position of the overhead floor 1 of the granulation tower.

[0053] b. Fabricate and weld the bottom keel and the side keel 4 of the hanging formwork module on the ground inside the granulation tower silo 10, and install the bottom formwork at the bottom of the hanging formwork module.

[0054] As Figure 4 shown, the hanging formwork system is divided into several modules along the length direction of the rigid beam 1-1 steel skeleton, and each module is fabricated in sequence on the ground.

[0055] Among them, the bottom keel includes the main keel 2 and the secondary keel 3. The main keel 2 and the secondary keel 3 form a grid structure. In order to facilitate the laying of the bottom formwork, secondary keels are also provided on the grid structure formed by the main keel 2 and the secondary keel 3.

[0056] The bottom formwork is a stainless steel bottom formwork. The bottom formwork is laid on the bottom keel and serves as the formwork for the bottom surface of the overhead floor when pouring the overhead floor. Since the bottom formwork remains on the overhead floor after the overhead floor is poured, in order to ensure the firmness of the connection, V-shaped steel bars are provided on the upper surface of the bottom formwork. After pouring the overhead floor, the V-shaped steel bars on the bottom formwork are embedded in the concrete of the overhead floor.

[0057] c. As Figure 8 shown, use a tower crane to hoist the hanging formwork modules to the lower part of the rigid beam 1-1 steel skeleton in sequence in blocks, and weld the hanging keel 6 between the side keels 4 on both sides of the module. The hanging keel 6 spans across the upper parts of the two rigid beam 1-1 steel skeletons.

[0058] After the hanging formwork module is hoisted in place, the two rigid girders 1-1 steel skeletons are just located between the side keels 4 on both sides, the bottom keel is located below the rigid girder 1-1 steel skeleton, and the subsequently installed hanging keel 6 is located above the rigid girder 1-1 steel skeleton. The side keel 4, the bottom keel and the hanging keel 6 enclose a rectangular frame structure, and the two rigid girders 1-1 steel skeletons are located within this frame structure, so that the entire hanging formwork module is supported by the rigid girder 1-1 steel skeleton.

[0059] When constructing the horizontal hanging keel 6, after initially checking the elevation and axis position of the hanging formwork module, first weld the hanging keel 6 at both ends of the module; after the welding of the hanging keel 6 at both ends is completed, check the elevation and position at each position of the hanging keel 6, and after the check is correct, weld the hanging keel 6 in the middle part.

[0060] d. After all the hanging formwork modules are installed in place, fix and connect two adjacent hanging formwork modules to form an integral whole.

[0061] e. Install the continuous connecting keel 7 to connect all the hanging keels 6 into an integral whole.

[0062] There are several continuous connecting keels 7. The length direction of the continuous connecting keel 7 is consistent with the length direction of the rigid girder 1-1 steel skeleton. The length of the continuous connecting keel 7 runs through all the hanging formwork modules, so as to connect all the hanging keels 6 into an integral whole. By the continuous connecting keel 7, the connection firmness of the hanging formwork system is further increased while the stress capacity of the hanging formwork system is enhanced.

[0063] f. Set the structural tie points 8 on the hanging formwork system. The structural tie points 8 are connected to the silo wall of the round silo through the steel wire ropes 9.

[0064] After installing the structural tie points 8, the overall installation of the hanging formwork is completed, as Figure 9 shown.

[0065] The position and quantity of the structural tie points 8 are determined according to needs. Through the structural tie points 8, the deflection of the entire hanging formwork system is controlled to prevent the horizontality of the overhead floor from not meeting the standards during pouring.

[0066] As Figure 6 shown, the structural tie point 8 includes a tie rod 8-1 and a pull ring 8-3 provided at the upper end of the tie rod 8-1. The tie rod 8-1 passes through the bottom formwork, and the upper and lower ends of the tie rod 8-1 are respectively welded to the hanging keel 6 and the bottom keel. A sleeve 8-3 is sleeved on the tie rod 8-1, and the sleeve 8-3 is located between the hanging keel 6 and the bottom keel.

[0067] As Figure 7As shown, the pull ring 8-3 is connected to the wall of the granulation tower silo 10 through the steel wire rope 9, and the steel wire rope 9 is in a tensioned state. The pull ring 8-3 is subjected to a tensile force, and the structural connection point 8 conducts the tensile force to the hanging keel 6 and the bottom keel, thereby controlling the vertical deformation displacement of the position of the structural connection point 8.

[0068] The sleeve 8-3 is a PVC pipe. By using the PVC pipe, when pouring the concrete of the overhead floor, the concrete will not come into contact with the tie rod 8-1, which is convenient for the subsequent process of smoothly removing the tie rod 8-1 from the concrete.

[0069] g. Bind the steel bars of the stiffening beam 1-1 of the overhead floor and the steel bars of the bottom slab 1-2 of the overhead floor between the bottom formwork and the hanging keel 6.

[0070] h. Pour the concrete of the bottom slab 1-2 of the overhead floor, and the pouring elevation reaches the upper surface of the bottom slab.

[0071] i. Set up the side formwork of the stiffening beam 1-1 and the formwork of the upper slab 1-3 of the overhead floor, and bind the steel bars of the upper slab 1-3 of the overhead floor.

[0072] j. Pour the concrete of the stiffening beam 1-1 and the upper slab 1-3 of the overhead floor.

[0073] Before pouring, water the roughened surface inside the stiffening beam 1-1 and clean up the crushed slag; before pouring the concrete of the upper slab 1-3 of the overhead floor, the concrete strength of the bottom slab 1-2 of the overhead floor shall not be lower than 60% of the design strength; after pouring, cure the concrete, and the curing time shall not be less than 7 days.

[0074] k. Remove the hanging formwork modules in sequence and lower them to the ground in blocks.

[0075] Remove each module of the hanging formwork modules as a whole and lower them to the ground in the order of removing the ones installed first and the ones installed later first.

[0076] When removing the skeleton of the hanging formwork module, one end is lifted by a tower crane, and the other end is connected by a chain block. After cutting the structural connection point 8 and the hanging keel 6, the skeleton of the hanging formwork module can be removed from the poured overhead floor. Slowly lower the chain block to make the skeleton of the hanging formwork module vertical, and then the tower crane lowers the skeleton of the hanging formwork module to the ground as a whole, and disassembles the skeleton on the ground.

[0077] Among them, the main keel 2, the secondary keel 3, the side keel 4, the connecting keel 5, the hanging keel 6 and the connecting keel 7 are all C-shaped steel.

[0078] The present invention uses a hanging formwork system for the construction of the overhead floor 1 of the granulation tower. The hanging formwork system is processed in modules on the ground. After processing, they are successively hoisted onto the steel skeleton of the stiffening beam 1-1 at the predetermined position. After connecting and fixing each module together and setting up the structural tie points 8, steel bars are tied on the hanging formwork system and the overhead floor is poured. After the pouring of the overhead floor is completed, the hanging formwork modules are successively removed and lowered, thus completing the construction of the overhead floor.

[0079] The steel skeleton of the stiffening beam 1-1 and each hanging formwork module are fabricated and welded on the ground, thus reducing high-altitude operations. The hanging formwork system is fabricated, hoisted, installed, removed and lowered in multiple modules, which can avoid safety accidents caused by excessive weight during hoisting. The present invention adopts a hanging formwork system, which is carried out after the slip form construction of the silo is completed. The hanging formwork system is hoisted by a tower crane and does not need to be lifted by the slip form system, thus reducing the difficulty of slip form construction. Moreover, the hanging formwork system is relatively simple in structure compared with the inner platform of the truss, with a short fabrication and installation period. The lifting, lowering and removal of the hanging formwork system are relatively simple. The hanging formwork system only needs to cover the rectangular overhead floor area and does not need to cover the entire interior of the silo like the inner platform of the truss, thus greatly saving materials and reducing the overall mass. The hanging formwork system reduces the deflection value of the formwork system through the structural tie points 8 and can ensure the levelness of the overhead floor during pouring.

[0080] The hanging formwork system of the present invention is fabricated on the ground, reducing high-altitude operations and improving the construction safety. Using this construction method, the construction speed is fast and the construction period is shortened. Using this method for construction saves a large amount of turnover tools. The modules of the hanging formwork system are divided according to the diameter of the granulation tower and the working performance of the tower crane, improving the utilization rate of machinery. Using this construction method reduces high-altitude suspended operations, reduces the construction difficulty and improves the construction quality.

[0081] The section steel used for the hanging formwork can consider using the material for the subsequent roof steel beam to select a suitable section steel, further reducing the cost. The installation and removal of the hanging formwork can be completed using the on-site tower crane without the need for additional hoisting equipment to be brought in. The modular fabrication, hoisting and installation and removal of the hanging formwork reduce the construction difficulty. Using the stiffening beam 1-1 skeleton for load-bearing saves a large amount of formwork support system materials.

Claims

1. An overhead suspension formwork system for a granulation tower, characterized in that, It is composed of several hanging formwork modules. Each hanging formwork module includes a bottom keel and side keels on both sides. A bottom form is laid on the bottom keel, and a hanging keel is arranged between the side keels on both sides. The ends of adjacent two hanging formwork modules are fixedly connected to each other. A connecting keel is arranged at the top of the hanging formwork system, and the connecting keel is connected to the hanging keels of all hanging formwork modules. Several structural tie points are distributed on the hanging formwork system.

2. The overhead layer hanging formwork system of the granulation tower according to claim 1, characterized in that, The side keels at the ends of adjacent two hanging formwork modules are connected and fixed into one body through a connecting keel.

3. The overhead layer hanging formwork system of the granulation tower according to claim 1, characterized in that, The structural tie point includes a pull rod and a pull ring arranged at the upper end of the pull rod. The pull rod passes through the bottom form, and the upper and lower ends of the pull rod are respectively welded to the hanging keel and the bottom keel. A sleeve is sleeved on the pull rod, and the sleeve is located between the hanging keel and the bottom keel.

4. The overhead suspension formwork system for the granulation tower according to claim 1, characterized in that, The bottom keel is a grid structure formed by a main keel and a secondary keel.

5. A construction method for the overhead layer of an ultra-high granulation tower, characterized in that, It includes the following steps: a. Use a tower crane to install two fabricated stiffened beam steel skeletons to the predetermined positions of the granulation tower silo. b. Fabricate and weld the bottom keel and side keels of the hanging formwork module on the ground inside the granulation tower silo, and install the bottom form at the bottom of the hanging formwork module. c. Use a tower crane to hoist the hanging formwork modules to the lower part of the stiffened beam steel skeleton in blocks in sequence. Weld the hanging keels between the side keels on both sides. The hanging keels span across the upper parts of the two stiffened beam steel skeletons. d. After all the hanging formwork modules are installed in place, connect adjacent two hanging formwork modules into a whole. e. Install a continuous connecting keel to connect all the hanging keels into a whole. f. Set structural tie points on the hanging formwork system. The structural tie points are connected to the silo wall of the silo through steel wires. g. Bind the steel bars of the overhead stiffened beam and the overhead floor slab between the bottom form and the hanging keel. h. Pour the concrete of the overhead floor slab, and the pouring elevation reaches the upper surface of the floor slab. i. Support the lateral formwork of the stiffened beam and the formwork of the upper layer of the overhead floor, and bind the steel bars of the upper layer of the overhead floor. j. Pour the concrete of the stiffened beam and the upper layer of the overhead floor. k. Remove the hanging formwork modules in blocks in sequence and lower them to the ground.

6. The construction method of the overhead layer of the ultra-high granulation tower according to claim 5, characterized in that, The hanging formwork system is divided into several modules along the length direction of the stiffened beam steel skeleton.

7. The construction method of the overhead layer of the ultra-high granulation tower according to claim 5, characterized in that, In step c, when constructing the hanging keel, after initially checking the elevation and axis position of the hanging formwork module, first weld the hanging keels at both ends. After the welding of the hanging keels at both ends is completed, check the elevation and position at each hanging keel position. After the check is correct, weld the hanging keels in the middle part.

8. The construction method of the overhead layer of the ultra-high granulation tower according to claim 5, characterized in that, In step j, before pouring, water the roughened surface inside the stiffened beam and clean up the crushed slag. Before pouring the concrete of the upper layer of the overhead floor, the concrete strength of the overhead floor slab shall not be lower than 60% of the design strength. After pouring is completed, cure the concrete, and the curing time shall not be less than 7 days.

9. The construction method of the overhead layer of the ultra-high granulation tower according to claim 5, characterized in that, In step k, remove the hanging formwork modules in sequence as a whole according to the order of removing the later installed ones first and the earlier installed ones later and lower them to the ground.

10. The construction method of the overhead layer of the ultra-high granulation tower according to claim 5, characterized in that, In step k, when the skeleton of the suspended formwork module is demolished, one end is lifted by a tower crane, and the other end is connected by a chain block. After cutting the structural tie points and the suspended keel, slowly lower the chain block to make the skeleton of the suspended formwork module vertical, and then the tower crane lowers the skeleton of the suspended formwork module to the ground as a whole for disassembly on the ground.

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