A construction method for early removal of secondary ribs with variable axil structure

Abstract

The present invention relates to the field of engineering technology, and in particular to a method for early dismantling of secondary ribs of a variable axil structure, the construction method comprising the following steps: S1: production of deformable shaped steel secondary keels: production of secondary keels for axil construction, the secondary keels are made of 50×50×2.5mm square steel, and are made according to the size of the axil; S2: two holes are punched mechanically at the ends of the secondary keels of the axil part, the holes are set in the middle of the square steel, and the horizontal spacing is 100mm. The present invention solves the problem that the secondary keels of the plate structure need to be cut into short keels, resulting in large loss of turnover materials and slow turnover, that is, the strength needs to reach 100%, resulting in the need for a large number of customizations. In addition, due to the use of standardized templates, the quality of construction is effectively guaranteed, and the cost is effectively saved.

Description

Technical Field

[0001] The invention relates to the field of engineering technology, and in particular to a construction method for early dismantling of secondary ribs of a variable haunch structure. Background Art

[0002] At present, a common practice for adding beams, plates and armpits is to process the secondary beams into short sizes of 80cm, 90cm and other sizes, and the ends need to be cut into bevels and placed along the length of the armpits. This practice makes the short-sized wood pieces cannot be used in subsequent structures, which is a serious waste. They can only be used in one project and cannot be turned around, resulting in a large waste of resources.

[0003] At present, another common practice for adding beams, plates and armpits is to process the secondary ribs into short sizes of 80cm, 90cm and so on using wooden planks, and cut the ends into bevels and place them along the length of the armpits. Since one wooden plank must be supported by two vertical poles, otherwise it will become unstable, thus resulting in a large amount of waste of steel pipes.

[0004] At present, when the span of the underground first floor is 9m, the specification requires that the concrete strength reaches 100% before the formwork can be removed, which is generally 30 days after the concrete is poured. In addition, the axil in this project has two specifications of 1m and 1.2m, and multiple sets of irregular axil keels of different specifications are required, which wastes a lot of steel. Summary of the invention

[0005] In order to solve the problems existing in the above-mentioned prior art, a variable axil structure secondary rib early dismantling construction method proposed in the present invention effectively solves the problem that a large number of wooden secondary keels are processed into sizes that cannot be turned around and utilized, and irregular axil keel specifications cannot be turned around quickly and multiple sets need to be processed, and different axil sizes need to be produced in multiple sets. The problem saves costs and ensures the quality of concrete molding at the axil.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A construction method for early removal of secondary ribs with a variable axil structure, the construction method comprising the following steps:

[0008] S1: Production of deformable shaped steel secondary keel: Production of secondary keel for haunch construction, the secondary keel is made of 50×50×2.5mm square steel, according to the size of haunch;

[0009] S2: Two holes are punched mechanically at the end of the secondary keel at the haunch part. The holes are set in the middle of the square steel with a horizontal spacing of 100mm. A 5mm steel plate is set at the end of the secondary keel for end sealing and reinforcement;

[0010] S3: The secondary keel of the non-haunch part is made of wooden square. Two holes are mechanically punched in the wooden square keel at the same position as the square steel keel, and a layer of iron sheet is wrapped on the outside for reinforcement;

[0011] S4: Make early dismantling joints. The early dismantling joints are welded into a closed shape with 5mm steel plates, one side of which is connected with hinges to ensure that the secondary keel can be removed from the side during early dismantling;

[0012] S5: During construction, first assemble the shaped steel secondary keel underground according to the length of the haunch. Use matching positioning reinforcement plates at the corners of the secondary keel assembly to position, fix and strengthen it. The fixing method is 4 tension bolts;

[0013] S6: Connect the shaped steel secondary keel and the wooden secondary keel with the early-dismantling joint made according to the drawing: insert the early-dismantling head into the square box of the early-dismantling head, and use the reserved bolt holes to connect the shaped steel secondary keel and the early-dismantling joint, and the wooden secondary keel and the early-dismantling joint, respectively, to form an integral early-dismantling keel;

[0014] S7: After the formwork support frame is erected, the top support and the main keel are installed, the keel that can be removed early is installed. The midpoint of the early removal head of the corresponding keel must be installed to coincide with the key point of the main keel;

[0015] S8: Formwork support: The formwork must be fixed to the wooden part of the keel that can be removed early with nails, and must not be fixed to the fixed steel secondary keel, and then the steel bars are tied and the concrete is poured;

[0016] S9: The concrete is cured until the strength reaches 50%, which is usually about 3 days. Loosen the bolts of the early dismantled joints, then open the side cover with hinges, knock out the shaped steel secondary keel from the side, and move to the next area for construction. If the next area needs to be increased in size, just replace the model of the positioning reinforcement plate and reassemble it.

[0017] Preferably, the shaped steel secondary keels in S1 are made of two 50×50×2.5 pieces spliced ​​together into a basic frame, and oblong holes are opened on the frame to facilitate the passage of two types of reinforcing plate bolts. The two types of secondary ribs are adjusted by using matching positioning reinforcing plates of different specifications, which solves the need to produce a large number of two different types of shaped steel secondary keels and saves costs.

[0018] Preferably, two mechanical holes are used at the ends of the secondary keels in S2 and S3, which solves the problem of connecting the secondary keels with early-disassembly joints.

[0019] Preferably, the early dismantling joint in S4 is welded into a closed shape with 5mm steel plate, so that the joint is firm, the connection and the quality of the joint are guaranteed, and one side is connected by a hinge to ensure that the shaped steel secondary keel can be removed from the side during early dismantling, solving the problem of the keel being difficult to dismantle during early dismantling.

[0020] Preferably, in S6, the pre-dismantled joints made underground are used to connect the shaped steel secondary keels and the wooden secondary keels, so that most of the splicing work is completed in the background, reducing the splicing content on the working surface and speeding up the construction speed.

[0021] Preferably, the size of the assembled steel secondary keel in S5 is 1m or 1.2m, and the positioning reinforcement plate is 1m or 1.2m.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The invention provides a method for early dismantling secondary ribs of a variable axil structure, a deformable shaped steel secondary beam, an early dismantling head, and a corresponding assembly construction method, which effectively solves the problem that a large number of wooden secondary keels are processed into sizes that cannot be turned around, and irregular axil keel specifications cannot be turned around quickly and multiple sets need to be processed, and multiple sets need to be made for different axil sizes, thereby saving costs and ensuring the quality of concrete molding at the axil. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a construction flow chart of the construction method of the present invention;

[0025] Figure 2 This is a schematic diagram of the method for making a deformable shaped steel secondary beam;

[0026] Figure 3 This is a cross-sectional view of the early disassembly joint;

[0027] Figure 4 It is the connection diagram of the standardized steel secondary beam and the early-dismantling joint. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Reference Figure 1-Figure 4 , a variable axil structure secondary rib early dismantling construction method, the construction method comprises the following steps:

[0030] S1: Production of deformable shaped steel secondary keel: Production of secondary keel for haunch construction, the secondary keel is made of 50×50×2.5mm square steel, according to the size of haunch;

[0031] S2: Two holes are punched mechanically at the end of the secondary keel at the haunch part. The holes are set in the middle of the square steel with a horizontal spacing of 100mm. A 5mm steel plate is set at the end of the secondary keel for end sealing and reinforcement;

[0032] S3: The secondary keel of the non-haunch part is made of wooden square. Two holes are mechanically punched in the wooden square keel at the same position as the square steel keel, and a layer of iron sheet is wrapped on the outside for reinforcement;

[0033] S4: Make early dismantling joints. The early dismantling joints are welded into a closed shape with 5mm steel plates, one side of which is connected with hinges to ensure that the secondary keel can be removed from the side during early dismantling;

[0034] S5: During construction, first assemble the shaped steel secondary keel underground according to the length of the haunch. Use matching positioning reinforcement plates at the corners of the secondary keel assembly to position, fix and strengthen it. The fixing method is 4 tension bolts;

[0035] S6: Connect the shaped steel secondary keel and the wooden secondary keel with the early-dismantling joint made according to the drawing: insert the early-dismantling head into the square box of the early-dismantling head, and use the reserved bolt holes to connect the shaped steel secondary keel and the early-dismantling joint, and the wooden secondary keel and the early-dismantling joint, respectively, to form an integral early-dismantling keel;

[0036] S7: After the formwork support frame is erected, the top support and the main keel are installed, the keel that can be removed early is installed. The midpoint of the early removal head of the corresponding keel must be installed to coincide with the key point of the main keel;

[0037] S8: Formwork support: The formwork must be fixed to the wooden part of the keel that can be removed early with nails, and must not be fixed to the fixed steel secondary keel, and then the steel bars are tied and the concrete is poured;

[0038] S9: The concrete is cured until the strength reaches 50%, which is usually about 3 days. Loosen the bolts of the early dismantled joints, then open the side cover with hinges, knock out the shaped steel secondary keel from the side, and move to the next area for construction. If the next area needs to be increased in size, just replace the model of the positioning reinforcement plate and reassemble it.

[0039] The S1 standard steel secondary purlins are made of two 50×50×2.5 steel purlins spliced ​​together to form a basic frame. Long round holes are opened on the frame to facilitate the passage of two types of reinforcing plate bolts. The two types of secondary ribs are adjusted using matching positioning reinforcing plates of different specifications, which solves the need to produce a large number of two different types of standard steel secondary purlins and saves costs.

[0040] In S2 and S3, two mechanical holes are used at the end of the secondary keel, which solves the problem of connecting the secondary keel with the early-dismantling joint.

[0041] The early dismantling joint in S4 is welded into a closed shape with 5mm steel plate, so that the joint is firm, and the quality of the connection is guaranteed. One side is connected with a hinge to ensure that the shaped steel secondary keel can be removed from the side during early dismantling, solving the problem of the keel being difficult to dismantle during early dismantling.

[0042] In S6, early-dismantling joints are used underground to connect the shaped steel secondary keels and wooden secondary keels. In this way, most of the splicing work is completed in the background, reducing the splicing content on the work surface and speeding up the construction.

[0043] The size of the assembled steel secondary keel in S5 is 1m or 1.2m, and the positioning reinforcement plate is 1m or 1.2m.

[0044] The variable axil structure secondary rib early dismantling construction method provided by the present invention, the invention of deformable shaped steel secondary beam, the invention of early dismantling head, and the corresponding assembly construction method, effectively solve the problem that a large number of wooden secondary keels are processed into sizes that cannot be turned around and utilized, and the irregular axil keel specifications cannot be turned around quickly and multiple sets need to be processed, and the problem that multiple sets need to be produced for different axil sizes, thereby saving costs and ensuring the quality of concrete molding at the axil.

[0045] The present invention solves the problem that the plate structure with ribbed secondary keels needs to be cut into short keels, resulting in large loss of turnover materials and slow turnover (the strength needs to reach 100%), which leads to the need for a large number of customizations. In addition, due to the use of standardized templates, the quality of construction is effectively guaranteed and the cost is effectively saved.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A construction method for early removal of secondary ribs with a variable haunch structure, characterized in that: The construction method comprises the following steps: S1: Production of deformable shaped steel secondary keel: Production of secondary keel for haunch construction, the secondary keel is made of 50×50×2.5mm square steel, according to the size of haunch; S2: Two holes are punched mechanically at the end of the secondary keel at the haunch part. The holes are set in the middle of the square steel with a horizontal spacing of 100mm. A 5mm steel plate is set at the end of the secondary keel for end sealing and reinforcement; S3: The secondary keel of the non-haunch part is made of wooden square. Two holes are mechanically punched in the wooden square keel at the same position as the square steel keel, and a layer of iron sheet is wrapped on the outside for reinforcement; S4: Make early dismantling joints. The early dismantling joints are welded into a closed shape with 5mm steel plates, one side of which is connected with hinges to ensure that the secondary keel can be removed from the side during early dismantling; S5: During construction, first assemble the shaped steel secondary keel underground according to the length of the haunch. Use matching positioning reinforcement plates at the corners of the secondary keel assembly to position, fix and strengthen it. The fixing method is 4 tension bolts; S6: Connect the shaped steel secondary keel and the wooden secondary keel with the early-dismantling joint made according to the drawing: insert the early-dismantling head into the square box of the early-dismantling head, and use the reserved bolt holes to connect the shaped steel secondary keel and the early-dismantling joint, and the wooden secondary keel and the early-dismantling joint, respectively, to form an integral early-dismantling keel; S7: After the formwork support frame is erected, the top support and the main keel are installed, the keel that can be removed early is installed. The midpoint of the early removal head of the corresponding keel must be installed to coincide with the key point of the main keel; S8: Formwork support: The formwork must be fixed to the wooden part of the keel that can be removed early with nails, and must not be fixed to the fixed steel secondary keel, and then the steel bars are tied and the concrete is poured; S9: The concrete is cured until the strength reaches 50%, which is usually about 3 days. Loosen the bolts of the early dismantled joints, then open the side cover with hinges, knock out the shaped steel secondary keel from the side, and move to the next area for construction. If the next area needs to be increased in size, just replace the model of the positioning reinforcement plate and reassemble it.

2. A variable haunch structure secondary rib early dismantling construction method according to claim 1, characterized in that: The S1 standard steel secondary purlins are made of two 50×50×2.5 steel purlins spliced ​​together to form a basic frame. Long round holes are opened on the frame to facilitate the passage of two types of reinforcing plate bolts. The two types of secondary ribs are adjusted using matching positioning reinforcing plates of different specifications, which solves the need to produce a large number of two different types of standard steel secondary purlins and saves costs.

3. The method for early dismantling of secondary ribs with a variable haunch structure according to claim 1, characterized in that: In S2 and S3, two mechanical holes are used at the end of the secondary keel, which solves the problem of connecting the secondary keel with the early-dismantling joint.

4. The method for early dismantling of secondary ribs with a variable haunch structure according to claim 1, characterized in that: The early dismantling joint in S4 is welded into a closed shape with 5mm steel plate, so that the joint is firm, and the quality of the connection is guaranteed. One side is connected with a hinge to ensure that the shaped steel secondary keel can be removed from the side during early dismantling, solving the problem of the keel being difficult to dismantle during early dismantling.

5. The method for early dismantling of secondary ribs with a variable haunch structure according to claim 1, characterized in that: In S6, early-dismantling joints are used underground to connect the shaped steel secondary keels and wooden secondary keels. In this way, most of the splicing work is completed in the background, reducing the splicing content on the work surface and speeding up the construction.

6. The method for early dismantling of secondary ribs with a variable haunch structure according to claim 1, characterized in that: The size of the assembled steel secondary keel in S5 is 1m or 1.2m, and the positioning reinforcement plate is 1m or 1.2m.

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