Thin-wall grain silo door opening construction method

Abstract

The invention discloses a thin-wall grain silo door opening construction method, which belongs to the technical field of silo construction, and comprises the following specific steps: S1, reserving a door opening position in the silo wall building process, and reserving erected reinforcing steel bars on the top side wall and the two side walls in the horizontal direction of the reserved door opening; s2, a pouring formwork is erected at the position of the reserved door opening, and the erected reinforcing steel bars are located in gaps formed after the pouring formwork is erected; s3, a gap, away from the silo wall of the silo, of the built building formwork is sealed through channel steel; s4, concrete pouring is conducted in a gap defined by the pouring formwork; and S5, after standing is conducted for 10-12 h and it is detected that the concrete reaches the demolding strength, the pouring formwork is dismantled. The silo has the effect that constructors can convey building materials inside and outside the silo conveniently.

Description

Technical Field

[0001] This invention relates to the field of silo construction, and in particular to a method for constructing doorways for thin-walled grain silos. Background Technology

[0002] A grain silo is a building or structure used for storing, transporting, and preserving grain. Its interior space is typically cylindrical, equipped with temperature control, ventilation, and moisture-proofing facilities to ensure the quality and safety of the grain. Its size depends on demand and purpose, and is usually designed based on the type and quantity of grain and the historical needs of the region.

[0003] A type of grain silo constructed of concrete has walls with a thickness of 26mm. In technologies related to such thin-walled grain silos, the silo walls are typically formed by pouring concrete in stages after reinforcing steel reinforcement. This allows for direct construction of the final door opening during the silo's height construction, facilitating the installation of the door frame and door. However, during grain silo construction, building materials frequently need to be moved back and forth between the inside and outside of the silo. Due to the size limitations of the door opening, only small tools can be used to transport the materials, making it inconvenient for construction workers. Summary of the Invention

[0004] To facilitate the transportation of building materials inside and outside the silo by construction workers, this application provides a method for constructing the doorway of a thin-walled grain silo.

[0005] The technical solution for constructing a thin-walled grain silo doorway provided in this application is as follows: A method for constructing a doorway for a thin-walled grain silo includes the following steps: S1. During the construction of the silo wall, a doorway location is reserved, with reinforcing bars installed on the top side wall and both horizontal side walls of the reserved doorway; S2. A casting formwork is erected at the reserved doorway location, with the reinforcing bars positioned within the gap formed after the casting formwork is erected; S3. The gap between the erected formwork and the silo wall is sealed using channel steel; S4. Concrete is poured into the gap enclosed by the casting formwork; S5. After standing for 10-12 hours and testing to ensure the concrete reaches its demolding strength, the casting formwork is removed.

[0006] By adopting the above technical solution, the doorway is formed after the grain silo wall is finally formed. This allows for a larger opening to be reserved during the grain silo forming process, facilitating the transportation of building materials inside and outside the silo by construction workers using medium-sized tools such as forklifts. The operation of transporting building materials is simple for construction workers. At the same time, the separate forming of the doorway at the end helps to further ensure the construction accuracy of the doorway, thereby ensuring the final forming quality of the doorway.

[0007] Optionally, the casting template in S2 includes two sets of side plate assemblies and a top plate assembly. The two sets of side plate assemblies are respectively arranged on both sides of the reserved door opening in the horizontal direction. The side plate assembly includes a first side plate, a second side plate, and two side support rods. The first side plate and the second side plate are respectively pressed against the outer and inner sides of the silo. The two side support rods are respectively rotatably connected to the side of the first side plate and the second side plate that are far apart. After the side plate assembly is erected, one end of the side support rod is inserted into the ground. The top plate assembly includes a first top plate, a second top plate, a top support frame, and a top clamping member. The top plate assembly is arranged near the top of the reserved door opening. The first top plate and the second top plate are respectively pressed against the outer and inner sides of the silo. The top support frame is arranged on the ground and is used to support the bottom of the first top plate and the second top plate. The top clamping member is arranged on the top support frame and is used to press and fix the side of the first top plate and the second top plate that is far apart.

[0008] By adopting the above technical solution, the stable support of the side struts on the first and second side plates helps to fully ensure the stability of the position of the side plate assembly composed of the first and second side plates during pouring. The support of the top support frame and the top clamping member on the bottom and one side of the first and second top plates respectively helps to fully ensure the stability of the position of the top plate assembly during pouring, thereby facilitating the final molding quality of the concrete.

[0009] Optionally, the top clamping component includes two sets of clamping plates and two sets of clamping screws. Both sets of clamping screws are threaded into the top support frame and are located on the side of the first top plate and the second top plate that are far apart from each other. The two sets of clamping plates are fixedly connected to one end of the two sets of clamping screws. When the clamping screws rotate, the clamping screws move toward or away from the first top plate.

[0010] By adopting the above technical solution, rotating the two sets of clamping screws respectively causes the two sets of clamping plates to move towards the direction of the first top plate, thereby achieving the clamping and fixing of the first top plate and the second top plate. The clamping screws make the mechanism for fixing the first top plate and the second top plate convenient and stable.

[0011] Optionally, the side plate assembly further includes a side connecting rod, which includes a fixing part, a connecting part, and a locking part. The connecting part is integrally connected to one end of the fixing part and the cross-sectional size of the connecting part is smaller than that of the fixing part. The locking part is integrally connected to the end of the connecting part away from the fixing part and the cross-sectional size of the locking part is smaller than that of the connecting part. One end of the locking part passes through the first side plate and the second side plate in sequence and is threaded with a locking nut.

[0012] By adopting the above technical solution, the side connecting rod plays a role in further positioning the positions of the first side plate and the second side plate, which helps to further ensure the stability of the relative positions of the first side plate and the second side plate. At the same time, the connecting part plays a role in positioning the side connecting rod during installation, which helps to ensure the consistency of the position of the side connecting rod after installation.

[0013] Optionally, the channel steel in S3 includes side channel steel and top channel steel. The side channel steel is provided with two and is used to close the gap between the two sets of side plate assemblies. The top channel steel is used to close the gap between the top plate assembly. The side channel steel is rotatably connected with a reinforcing rod. The end of the reinforcing rod away from the side channel steel is fixedly installed at the bottom of the fixed channel steel.

[0014] By adopting the above technical solution, the setting of the reinforcing rod facilitates the enhancement of the connection strength between the side channel steel and the top channel steel, which is conducive to further ensuring the stability of the relative position of the side channel steel and the top channel steel.

[0015] Optionally, one end of the reinforcing rod is rotatably connected to a mounting plate, the mounting plate having a through-hole, and the bottom of the top channel steel having a pre-set connecting screw. When fixing the reinforcing rod, the connecting screw is passed through the through-hole and a mounting nut is threaded onto it so that the mounting nut is pressed against the mounting plate.

[0016] By adopting the above technical solution, the fixed connection between the side channel steel and the top channel steel is simple and convenient, which facilitates the quick fixation between the side channel steel and the top channel steel. At the same time, the rotating setting of the mounting plate allows the mounting plate to have a certain deformation, which makes it easy to adapt to different installation conditions and has strong applicability.

[0017] Optionally, the side plate assembly further includes a side tie rod. When the side channel steel closes the gap of the side plate assembly, the side tie rod is sequentially passed through the first side plate, the side channel steel, and the second side plate, and a nut is threaded onto it so that the nut abuts against the second side plate. The top plate assembly further includes a top tie rod. When the top channel steel closes the gap of the top plate assembly, the top tie rod is sequentially passed through the first top plate, the top channel steel, and the second top plate, and a nut is threaded onto it so that the nut abuts against the second top plate.

[0018] By adopting the above technical solution, the installation of side tie rods and fixed tie rods makes the installation of side channel steel and top channel steel quick and easy, and helps to fully ensure the stability of the position of the side channel steel and top channel steel after installation.

[0019] Optionally, both the first side plate and the second side plate are provided with slots, and after the casting template is erected, the first top plate and the second top plate are respectively engaged in the slots of the first side plate and the second side plate.

[0020] By adopting the above technical solution, the slots further limit the positions of the first and second top plates, thereby helping to further ensure the overall stability after the casting formwork is erected.

[0021] Optionally, the first side plate has two through-holes distributed vertically, and the second side plate has a through-hole, with the second hole located between the two first holes; in S4, concrete is poured in sequence from low to high through the first and second holes, and the time interval between pouring at two adjacent holes does not exceed 2 hours.

[0022] By adopting the above technical solution, the concrete poured with multiple holes in the vertical direction is conducive to ensuring the uniformity of the medium in the concrete after pouring and distribution in the pouring template. The setting that the time interval between pouring two adjacent holes does not exceed 2 hours makes it less likely for cold joints to occur after the concrete is poured in sections, thus helping to fully guarantee the structural strength after the concrete is finally poured and formed.

[0023] Optionally, both the first and second pouring holes are fitted with a cover plate that opens and closes the opening of the first or second pouring hole. The cover plate includes a closing part and a positioning part. A sealing gasket is embedded in the outer peripheral surface of the closing part, and the positioning part abuts against the first or second side plate.

[0024] By adopting the above technical solution, the positioning part plays a positioning role when the cover plate closes the opening of the first or second pouring hole, which facilitates the quick installation of the cover plate to the required position. The setting of the sealing gasket helps to fully ensure the sealing stability when the cover plate closes the opening of the first or second pouring hole.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The door opening is formed after the grain silo wall is finally formed, so that a larger opening can be reserved during the grain silo forming process. This makes it easier for construction workers to transport building materials inside and outside the silo using medium-sized tools such as forklifts, and the operation of transporting building materials is simple.

[0026] 2. The side struts provide stable support for the first and second side plates, which helps to ensure the stability of the side plate assembly composed of the first and second side plates during the pouring process. The top support frame and the top clamping member provide support for the bottom and one side of the first and second top plates, respectively, which helps to ensure the stability of the top plate assembly during the pouring process, thereby facilitating the final molding quality of the concrete.

[0027] 3. The concrete poured with multiple holes in the vertical direction helps to ensure the uniformity of the medium in the concrete after pouring and distribution within the pouring formwork. The setting that the time interval between two adjacent holes does not exceed 2 hours makes it less likely for cold joints to occur after the concrete is poured in sections, thus helping to fully guarantee the structural strength of the concrete after it is finally poured and formed. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the reserved doorway in an embodiment of this application.

[0029] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this application.

[0030] Figure 3 yes Figure 2 A magnified view of part A in the diagram.

[0031] Figure 4 This is a schematic diagram showing the connection relationship between the first side plate and the second side plate in an embodiment of this application.

[0032] Figure 5 This is a schematic diagram showing the connection relationship between the first top plate and the second top plate in an embodiment of this application.

[0033] Figure 6 This is a schematic diagram of the connection relationship between the side channel steel and the top channel steel in an embodiment of this application.

[0034] Figure 7 yes Figure 6 A magnified view of part B in the diagram.

[0035] Explanation of reference numerals in the attached figures: 1. First side plate; 2. Second side plate; 3. Side support rod; 4. Side connecting rod; 401. Fixing part; 402. Connecting part; 403. Locking part; 5. Locking nut; 6. First top plate; 7. Second top plate; 8. Top support frame; 9. Top clamping part; 901. Clamping plate; 902. Clamping screw; 10. Slot; 11. Side channel steel; 12. Top channel steel; 13. Side tie rod; 14. Top tie rod; 15. Top nut; 16. Reinforcing rod; 17. Mounting plate; 18. Strip hole; 19. Mounting nut; 20. First pouring hole; 21. Second pouring hole; 22. Cover plate; 221. Covering part; 222. Positioning part; 23. Sealing gasket; 24. Side nut. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0037] This application discloses a method for constructing a doorway for a thin-walled grain silo. The method includes the following specific steps: S1, referring to... Figure 1During the construction of the silo walls, a door opening is reserved, and steel bars are installed on the top side wall and the two horizontal side walls of the reserved door opening. S2, Reference Figure 2 and Figure 3 A casting formwork is erected at the location of the reserved doorway, and the reinforcing bars are placed within the gap formed after the casting formwork is erected. S3. Use channel steel to seal the gap between the erected building formwork and the silo wall; S4. Pour concrete into the gap enclosed by the casting formwork; S5. After letting the concrete stand for 10-12 hours and testing to ensure it reaches the required demolding strength, the formwork can be removed.

[0038] Specifically, refer to Figure 2 and Figure 3 In step S2, the casting template includes two sets of side plate assemblies and a top plate assembly. The two sets of side plate assemblies are respectively set on both sides of the reserved doorway in the horizontal direction. The side plate assembly includes a first side plate 1, a second side plate 2, and two side support rods 3. The first side plate 1 and the second side plate 2 are respectively pressed against the outer and inner sides of the silo. The two side support rods 3 are rotatably connected to the side of the first side plate 1 and the second side plate 2 that are far apart from each other. After the side plate assembly is erected, one end of the side support rod 3 is inserted into the ground to provide stable support for the positions of the first side plate 1 and the second side plate 2, thereby ensuring the stability of the positions of the first side plate 1 and the second side plate 2. The end of the side support rod 3 inserted into the ground is set with a pointed end to facilitate the insertion of the side support rod 3 into the ground.

[0039] Reference Figure 3 and Figure 4 The side plate assembly also includes a side connecting rod 4. Specifically, the side connecting rod 4 includes a fixing part 401, a connecting part 402, and a locking part 403. Both the connecting part 402 and the locking part 403 are cylindrical. The connecting part 402 is integrally connected to one end of the fixing part 401, and the cross-sectional dimension of the connecting part 402 is smaller than that of the fixing part 401. The locking part 403 is integrally connected to the end of the connecting part 402 away from the fixing part 401, and the cross-sectional dimension of the locking part 403 is smaller than that of the connecting part 402. One end of the locking part 403 passes through the first side plate 1 and the second side plate 2 in sequence and is threaded with a locking nut 5. When the locking nut 5 abuts against the second side plate 2, the first side plate 1 and the second side plate 2 are fixed under the clamping action of the fixing part 401 and the locking nut 5. The setting of the connecting part 402 also plays a positioning role when the locking nut 5 is locked, which helps to ensure the stability of the position of the locking nut 5 after it is locked.

[0040] Reference Figure 3In this embodiment, two side connecting rods 4 are selected. The two side connecting rods 4 are distributed in the horizontal direction and are set near the top of the first side plate 1. The first side plate 1 and the second side plate 2 facing each other and the outer peripheral surface of the connecting part 402 are provided with a release agent. In this embodiment, the release agent is selected as a water-based release agent. The excellent isolation performance of the water-based release agent facilitates the demolding after the concrete is formed.

[0041] Continue to refer to Figure 3 The top plate assembly includes a first top plate 6, a second top plate 7, a top support frame 8, and a top clamping member 9. The top plate assembly is set near the top of the reserved door opening. The first top plate 6 and the second top plate 7 are respectively clamped to the outer and inner sides of the silo. The top support frame 8 is set on the ground. The bottom of the first top plate 6 and the second top plate 7 abuts against the top of the top support frame 8, so that the top support frame 8 can provide stable support for the bottom of the first top plate 6 and the second top plate 7. The top clamping member 9 includes two sets of clamping plates 901 and two sets of clamping screws 902. Both sets of clamping screws 902 are threaded into the top support frame 8 and are located on the side away from the first top plate 6 and the second top plate 7, respectively. Each set of clamping screws 902 has two screws and is distributed in the horizontal direction. The two sets of clamping plates 901 are respectively provided with four screws 902 in a one-to-one correspondence. Each clamping plate 901 is circular and is fixedly connected to one end of each clamping screw 902. When the clamping screws 902 rotate, they drive the clamping plates 901 to move towards or away from the first top plate 6, so that the first top plate 6 and the second top plate 7 can be firmly fixed under the horizontal pressure of the two sets of clamping plates 901.

[0042] Continue to refer to Figure 3 Two slots 10 are provided on the opposite side of the first top plate 6 and the second top plate 7. After the casting formwork is erected, the two first top plates 6 and the second top plate 7 are respectively engaged in the two slots 10 of the first side plate 1 and the second side plate 2. The slots 10 play a role in further coordinating and limiting the positions of the first top plate 6, the second top plate 7, the first side plate 1 and the second side plate 2, thereby helping to further ensure the overall stability after the casting formwork is erected.

[0043] Combination Figure 4 and Figure 5In step S3, the channel steel includes side channel steel 11 and top channel steel 12. Two side channel steels 11 are provided to close the gap between the two sets of first side plates 1 and second side plates 2, i.e., the two sets of side plate assemblies. Specifically, when the side channel steel 11 closes the gap between the two sets of first side plates 1 and second side plates 2, the first side plates 1 and second side plates 2 respectively abut against the two flanges of the side channel steel 11. The side plate assembly also includes side tie rods 13. The side tie rods 13 are sequentially inserted through the first side plate 1, the side channel steel 11, and the second side plate 2, and threaded with a side nut 24. When the side nut 24 rotates to the state of abutting against the second side plate 2, a stable fixation is achieved between the side channel steel 11 and the first side plate 1 and the second side plate 2, thereby facilitating the final molding quality of the concrete on the first side plate 1 and the second side plate 2. In this embodiment, multiple side tie rods 13 are distributed vertically. To facilitate demolding when the side tie rods 13 are finally removed, a water-based release agent is also provided on the outer circumferential surface of the side tie rods 13.

[0044] Reference Figure 3 and Figure 5 The top channel steel 12 is used to close the gap between the first top plate 6 and the second top plate 7, i.e., the bottom of the top assembly. Specifically, when the top channel steel 12 closes the gap between the two sets of first top plates 6 and second top plates 7, the first top plates 6 and second top plates 7 respectively abut against the two flanges of the top channel steel 12. The top plate assembly also includes a top tie rod 14, which is sequentially inserted through the first top plate 6, the top channel steel 12, and the second top plate 7 and threaded with a top nut 15. When the top nut 15 is rotated to the state of abutting against the second top plate 7, the top channel steel 12 is firmly fixed to the first top plate 6 and the second top plate 7, thereby facilitating the final molding quality of the concrete on the first top plate 6 and the second top plate 7. In this embodiment, there are two top tie rods 14 distributed horizontally. To facilitate demolding when the top tie rods 14 are finally removed, a water-based release agent is also provided on the outer circumference of the top tie rods 14.

[0045] Reference Figure 6 and Figure 7 To further ensure the overall structural stability of the casting template, reinforcing rods 16 are rotatably connected to the sides of the two channel steels 11 that are close to each other. Mounting plates 17 are rotatably connected to the ends of the reinforcing rods 16 that are furthest from their respective side channel steels 11. The mounting plates 17 have through-holes 18. Two sets of connecting bolts are pre-welded to the bottom of the top channel steel 12. These two sets of connecting rods pass through the through-holes 18 of the two mounting plates 17 and are threaded with mounting nuts 19. When the mounting nuts 19 are tightened until the mounting plates 17 are pressed against the bottom of the top channel steel 12, the reinforcing rods 16 are securely fixed, thus further enhancing the connection strength between the side channel steels 11 and the top channel steel 12.

[0046] Reference Figure 3 and Figure 4To ensure the overall structural strength of the concrete after pouring, the first side plate 1 has two through-holes 20 distributed vertically, and the second side plate 2 has a through-hole 21 located between the two first pouring holes 20. In step S4, pouring is carried out sequentially from the lower first pouring hole 20, then the second pouring hole 21, and finally the higher first pouring hole 20. The time interval between pouring at adjacent holes does not exceed 2 hours. This helps ensure the uniformity of the concrete pouring medium while minimizing cold joints, thus guaranteeing the final quality of the poured concrete.

[0047] Continue to refer to Figure 3 and Figure 4 Each of the first pouring hole 20 and the second pouring hole 21 is fitted with a cover plate 22. The cover plate 22 includes a covering part 221 and a positioning part 222. The covering part 221 is integrally connected to one end of the positioning part 222, and the cross-sectional dimension of the covering part 221 is smaller than that of the positioning part 222. A sealing gasket 23 is embedded on the outer peripheral surface of the covering part 221. When the cover plate 22 is fitted with the first pouring hole 20 or the second pouring hole 21 to seal the hole wall of the first pouring hole 20 or the second pouring hole 21, the sealing gasket 23 presses against the hole wall of the first pouring hole 20 or the second pouring hole 21, and the positioning part 222 abuts against the first side plate 1 or the second side plate 2. The positioning part 222 serves to position the cover plate 22, making it easy to quickly install the cover plate 22 into the required position. The sealing gasket 23 helps to fully ensure the sealing stability of the cover plate 22 when it closes the opening of the first pouring hole 20 or the second pouring hole 21.

[0048] After removing the casting template in step S4, the holes formed by the side connecting rod 4, side tie rod 13 and top tie rod 14 are reinforced with secondary concrete grouting. After the concrete after secondary grouting cools and solidifies, the door opening is formed.

[0049] The implementation principle of the thin-walled grain silo door opening construction method in this application embodiment is as follows: during the construction process, the door opening is finally formed after the grain silo wall is formed. This allows for a larger opening to be reserved during the grain silo forming process, which facilitates the transportation of building materials inside and outside the silo by construction personnel using medium-sized tools such as forklifts. The operation of transporting building materials by construction personnel is simple. At the same time, the setting of forming the door opening separately at the end helps to further ensure the construction accuracy of the door opening, thereby ultimately ensuring the forming quality of the door opening.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for constructing a doorway for a thin-walled grain silo, characterized in that: The specific steps include: S1. During the construction of the silo wall, a door opening is reserved, and steel bars are provided on the top side wall and the two horizontal side walls of the reserved door opening. S2. Erect a casting formwork at the location of the reserved doorway, with the reinforcing bars placed within the gap formed after the casting formwork is erected. S3. Use channel steel to seal the gap between the erected building formwork and the silo wall; S4. Pour concrete into the gap enclosed by the casting formwork; S5. After letting the concrete stand for 10-12 hours and testing to ensure it reaches the required demolding strength, the formwork can be removed.

2. The method for constructing a thin-walled grain silo doorway according to claim 1, characterized in that: The casting template in S2 includes two sets of side plate assemblies and a top plate assembly. The two sets of side plate assemblies are respectively set on both sides of the reserved door opening in the horizontal direction. The side plate assembly includes a first side plate (1), a second side plate (2) and two side support rods (3). The first side plate (1) and the second side plate (2) are respectively pressed against the outer and inner sides of the silo. The two side support rods (3) are respectively rotatably connected to the side of the first side plate (1) and the second side plate (2) that are far apart. After the side plate assembly is erected, one end of the side support rod (3) is inserted into the ground. The top plate assembly includes a first top plate (6), a second top plate (7), a top support frame (8), and a top clamping member (9). The top plate assembly is set near the top of the reserved door opening. The first top plate (6) and the second top plate (7) are respectively clamped to the outer and inner sides of the silo. The top support frame (8) is set on the ground and is used to support the bottom of the first top plate (6) and the second top plate (7). The top clamping member (9) is set on the top support frame (8) and is used to press and fix the side of the first top plate (6) and the second top plate (7) that is far apart.

3. The method for constructing a thin-walled grain silo doorway according to claim 2, characterized in that: The top clamping member (9) includes two sets of clamping plates (901) and two sets of clamping screws (902). The two sets of clamping screws (902) are threaded into the top support frame (8) and are located on the side away from the first top plate (6) and the second top plate (7), respectively. The two sets of clamping plates (901) are fixedly connected to one end of the two sets of clamping screws (902). When the clamping screws (902) rotate, the clamping screws (902) move towards or away from the first top plate (6).

4. The method for constructing a thin-walled grain silo doorway according to claim 2, characterized in that: The side plate assembly also includes a side connecting rod (4), which includes a fixing part (401), a connecting part (402), and a locking part (403). The connecting part (402) is integrally connected to one end of the fixing part (401), and the cross-sectional dimension of the connecting part (402) is smaller than that of the fixing part (401). The locking part (403) is integrally connected to the end of the connecting part (402) away from the fixing part (401), and the cross-sectional dimension of the locking part (403) is smaller than that of the connecting part (402). One end of the locking part (403) is sequentially inserted through the first side plate (1) and the second side plate (2) and is threaded with a locking nut (5).

5. The method for constructing a thin-walled grain silo doorway according to claim 4, characterized in that: The channel steel in S3 includes a side channel steel (11) and a top channel steel (12). The side channel steel (11) has two sections and is used to close the gap between the two sets of side plate assemblies. The top channel steel (12) is used to close the gap between the top plate assembly. The side channel steel (11) is rotatably connected to a reinforcing rod (16). The end of the reinforcing rod (16) away from the side channel steel (11) is fixedly installed at the bottom of the fixed channel steel.

6. The method for constructing a thin-walled grain silo doorway according to claim 5, characterized in that: One end of the reinforcing rod (16) is rotatably connected to a mounting plate (17). The mounting plate (17) has a through-hole (18). The bottom of the top channel steel (12) is pre-set with a connecting screw. When fixing the reinforcing rod (16), the connecting screw is passed through the through-hole (18) and a mounting nut (19) is threaded onto it so that the mounting nut (19) abuts against the mounting plate (17).

7. The method for constructing a thin-walled grain silo doorway according to claim 5, characterized in that: The side plate assembly also includes a side tie rod (13). When the side channel steel (11) closes the gap of the side plate assembly, the side tie rod (13) is sequentially passed through the first side plate (1), the side channel steel (11) and the second side plate (2) and a side nut (24) is threaded on so that the side nut (24) abuts against the second side plate (2). The top plate assembly also includes a top tie rod (14). When the top channel steel (12) closes the gap of the top plate assembly, the top tie rod (14) is sequentially inserted into the first top plate (6), the top channel steel (12) and the second top plate (7) and a top nut (15) is threaded onto it so that the top nut (15) abuts against the second top plate (7).

8. The method for constructing a thin-walled grain silo doorway according to claim 2, characterized in that: The first side plate (1) and the second side plate (2) are both provided with slots (10). After the casting template is erected, the first top plate (6) and the second top plate (7) are respectively engaged in the slots (10) of the first side plate (1) and the second side plate (2).

9. The method for constructing a doorway for a thin-walled grain silo according to claim 2, characterized in that: The first side plate (1) has two through-holes (20) distributed vertically, and the second side plate (2) has a through-hole (21) located between the two first holes (20). In S4, the concrete is poured through the first holes (20) and the second holes (21) in sequence from low to high position, and the time interval between pouring at two adjacent holes does not exceed 2 hours.

10. A method for constructing a doorway for a thin-walled grain silo according to claim 9, characterized in that: The first pouring hole (20) and the second pouring hole (21) are both fitted with a cover plate (22) for opening and closing the opening of the first pouring hole (20) or the second pouring hole (21). The cover plate (22) includes a covering part (221) and a positioning part (222). A sealing gasket (23) is embedded on the outer peripheral surface of the covering part (221). The positioning part (222) abuts against the first side plate (1) or the second side plate (2).

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