A construction method for quick-release attachment supports

Abstract

This invention relates to the field of attachment support construction and discloses a quick-release attachment support construction method, comprising the following steps: Step 1, preparing the attachment support and fixing components, the fixing components including a base plate and a threaded rod, the base plate having threaded holes; Step 2, passing the threaded rod through the top layer main structure within the height range of the lifting scaffold, one end of the threaded rod connecting to the threaded hole in the base plate, and the other end connecting to a nut; Step 3, removing the attachment support located at the bottom layer of the lifting scaffold and bolting the attachment support to the base plate on the top layer main structure. This method accelerates the installation and removal speed of the attachment support and improves construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of attachment support construction, and more specifically to a construction method for quick-release attachment support. Background Technology

[0002] Attached lifting scaffolding refers to external scaffolding that is erected to a certain height and attached to the main structure. Relying on its own lifting equipment and devices, it can climb or descend layer by layer with the engineering structure. It has anti-overturning and anti-falling devices and is usually used in high-rise building construction.

[0003] Attached lifting scaffolding typically covers 4-5 layers of main structure. Each layer of main structure is connected to the attached lifting scaffolding through several attachment supports. The attachment supports are connected to the main structure through screw rods and nuts. After the top layer of cast-in-place floor slab is poured, the attachment supports on the bottom layer of the main structure within the height range of the attached lifting scaffolding need to be quickly transferred to the top layer, and the disassembly and installation should be completed quickly. Because the regulations require that the spacing between the attached supports must not exceed 7m, there are at least a dozen attached supports on each floor, and some buildings may have hundreds of attached supports. If all of them are removed from the bottom and then installed on the top floor, it will take a lot of time. When the attached supports are removed, the scaffolding cannot be used as a construction platform, and other construction work needs to be suspended. The construction time during this stage greatly affects the overall construction progress.

[0004] Therefore, a construction method is needed that can accelerate the installation and removal of the attachment supports and improve construction efficiency. Summary of the Invention

[0005] The present invention aims to provide a construction method for quick-release attachment supports, so as to accelerate the installation and removal speed of attachment supports and improve construction efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a construction method for quick-release attachment supports, comprising the following steps: Step 1: Prepare the attachment support and fixing components. The fixing components include a base plate and a threaded rod. The base plate has threaded holes. Step 2: Pass the threaded rod through the top layer of the main structure within the height range of the lifting scaffold. Connect one end of the threaded rod to the threaded hole in the base plate and the other end to the nut. Step 3: Remove the attachment support at the bottom of the lifting scaffold and bolt the attachment support to the base plate on the top main structure.

[0007] The beneficial effects of this plan are: In the existing technology, when connecting the attachment support and the main structure, the usual method is to pass the lead screw through the base plate of the main structure and the attachment support, and then tighten the nuts at both ends of the lead screw. The lead screw is at least 400mm long, and in some places it is 800mm long, so it is difficult to handle. Then, rotating the two nuts also takes a lot of time.

[0008] In this solution, the base plate and threaded rod are integrated into a fixing component and are set in advance between the side forms of the top main structure before the concrete is poured. When installing or removing the attachment support, it is only necessary to bolt the attachment support to the base plate, which is convenient, quick and easy, and can be completed quickly, greatly speeding up the installation and removal of the attachment support and improving construction efficiency.

[0009] Furthermore, step two specifically includes the following steps: Step 2.1: Install the template for the top-level main structure. The template for the main structure includes a first side mold and a second side mold that are set opposite to each other. The first side mold is located on the outer facade of the main structure. The first side mold is provided with a first clearance hole. The bottom plate is embedded in the first clearance hole and is detachably connected to the first side mold. The second side mold is provided with a second clearance hole. Step 2.2: The fixing assembly also includes a pre-embedded tube and a nut. The end of the threaded rod passes through the second clearance hole and the pre-embedded tube and is threadedly connected to the threaded hole. The nut and the other end of the threaded rod are then connected. Step 2.3: Cast the main structure.

[0010] After the top-level cast-in-place floor slab is poured, it is necessary to wait for a period of time for the concrete to reach the design strength before removing the formwork. However, in order to ensure the progress, it is necessary to lift the attached lifting scaffold to the next level as soon as possible to prepare for the construction of the next level. After lifting, the formwork of the cast-in-place floor has not yet been removed, and the attached lifting scaffold cannot install the attachment support for that level, leaving the upper part of the attached lifting scaffold in a cantilevered state. Once a large wind load occurs, the attached lifting scaffold is prone to overturning.

[0011] If construction is carried out according to the design requirements, the construction progress will be delayed; if the attachment support is not installed in time due to rushing the progress, the safety risk will be greatly increased.

[0012] In this solution, the base plate of the attached support is used as part of the first side formwork. After the concrete is poured, the attached support and the base plate can be directly connected without removing the first side formwork or adjusting the attached support during formwork removal, thus ensuring the structural stability and construction safety of the lifting scaffold. Since the second side mold cannot be removed, this solution uses a threaded rod. The threaded rod passes through the second clearance hole and is threaded to the threaded hole, so that one end of the threaded rod is connected to the base plate with the attached support. Then, a nut is set at the other end of the threaded rod, so that the tension is directly transmitted to the second side mold without demolding.

[0013] Furthermore, it also includes an electric drill; the fixing components also include an inner pad. In step 2.2, the threaded rod passes through the second clearance hole, the inner pad block and the pre-embedded pipe in sequence. The inner pad block and the threaded rod are threadedly connected. The inner pad block is rotated so that it presses against the inner side of the second side mold. The process also includes step four: using an electric drill to rotate the threaded rod until it is flush with the outer side of the inner pad block, and removing the second side mold; using the electric drill to rotate the threaded rod in the opposite direction until it protrudes relative to the outer side of the inner pad block, connecting the nut to the end of the threaded rod, and the threaded rod transmits the tension to the main structure through the nut.

[0014] Furthermore, the threaded rod has a polygonal groove at one end near the second side mold, and the drill bit of the electric drill has a polygonal protrusion that matches the polygonal groove.

[0015] Furthermore, the threaded rod has a first threaded section and a second threaded section at both ends. The first threaded section is used to connect with the threaded hole, and the second threaded section is used to connect with the inner pad block. A stirring section is provided between the first threaded section and the second threaded section. The stirring section has several strip-shaped protrusions in the circumferential direction. The strip-shaped protrusions are arranged along the length of the threaded rod. The strip-shaped protrusions are used to push the solidified concrete that flows into the space between the threaded rod and the embedded pipe to move, thereby separating the solidified concrete from the embedded pipe.

[0016] Furthermore, the mixing section is used to pass through the inner pad block.

[0017] Furthermore, a connecting block is provided on the outer side of the first side mold, and the connecting block is located below the first clearance hole; in step 2.1, the base plate and the connecting block are bolted together.

[0018] Furthermore, the diameter of the second clearance hole is larger than that of the threaded hole. One end of the pre-embedded tube passes through the second clearance hole and abuts against the inner side of the first side mold. The other end of the pre-embedded tube is provided with a first limiting plate, and the end of the threaded rod away from the first side mold is provided with a second limiting plate. The second limiting plate abuts the first limiting plate against the periphery of the second clearance hole on the outer side of the second side mold. The threaded rod passes through the pre-embedded tube and is threadedly connected to the threaded hole. The second clearance hole, the pre-embedded tube, and the threaded rod are all slidably connected.

[0019] This solution also has the following effects: 1. In existing technologies, holes need to be pre-embedded in the main structure to fix the attachment support. Since the pre-embedded pipe is a consumable, PVC pipe is usually used to control costs. Therefore, the pre-embedded pipe can only be tied to the steel bars of the main structure. This fixing method is not strong and is easily displaced by impact during the concrete pouring process. This causes the mechanical structure of the attachment support and the main structure to deviate from the design, thereby reducing the reliability of the structure. If steel pipe is directly used instead of pre-embedded pipe for pre-embedding, the steel pipe needs to be recycled to save costs. However, when the steel pipe is pulled out of the concrete, it is easy to damage the concrete, thereby reducing the strength of the main structure. Therefore, this solution balances cost and the stability of the embedded pipe by using a combination of threaded rods and embedded pipes. The threaded rods are connected to the threaded holes in the base plate, thus using the threaded rods as supports to prevent the embedded pipes from shaking during pouring. When the attached supports are removed, the threaded rods can slide out of the embedded pipes for reuse. Furthermore, the threaded rods cannot be directly fixed to the side formwork, as this would hinder the binding of the reinforcing cage inside the side formwork. The threaded rods can only be detachably connected to the first side formwork after the reinforcing cage is bound, thus avoiding affecting the efficiency of reinforcing cage binding.

[0020] When the attachment support is installed on the top layer, it is mainly subjected to horizontal tension. Since the threaded rod is not in direct contact with the main structure, some concrete is allowed to enter the embedded pipe from the end of the embedded pipe, thereby connecting the embedded pipe and the threaded rod, so that they can work together to achieve better tensile strength. This also means that when removing the formwork later, it is necessary to use an electric drill to rotate the threaded rod to clean the embedded hole.

[0021] 2. Although the problem of embedded pipe displacement is solved, some concrete will still enter between the embedded pipe and the threaded rod because the embedded pipe is not directly connected to the side formwork. Therefore, in this solution, it is also necessary to use an electric drill to clean the hole. Replace the electric drill with a hexagonal screwdriver bit (a drill bit used for tightening bolts), and then set a corresponding hexagonal groove at the end of the threaded rod, so that the electric drill drives the threaded rod to rotate, thereby crushing the concrete between the embedded pipe and the threaded rod during the rotation. However, due to the presence of the embedded pipe, it will not affect the concrete outside the embedded pipe, and the cracks in the concrete inside the embedded pipe will not extend to the outside.

[0022] 3. After the concrete is poured, the threaded rod transmits the tension to the second side formwork through the nut, and then to the main structure through the second side formwork. Before removing the second side formwork, the nut needs to be removed. At this time, the tension loses its object of action, and the top layer of attachment support will lose the tension on the upper part of the lifting scaffold, making the lifting scaffold prone to overturning. In this solution, an inner pad is pre-embedded inside the second side formwork. Before the second side formwork is removed, even if the nut is removed, the tension can be temporarily transferred to the main structure through the inner pad, and there will be no risk of overturning. However, at this time, the concrete strength is insufficient and it cannot bear local stress for a long time. It is necessary to quickly remove the second side formwork and quickly install the nut and pad.

[0023] Before concrete pouring, the inner pad block rotates on the threaded rod and can press against the second side mold. This not only fixes the threaded rod and the second side mold, but also prevents grout leakage at the connection between the second side mold and the threaded rod when pouring concrete.

[0024] 4. When pouring concrete, the concrete enters the inside of the embedded pipe from the end of the embedded pipe. If the mixing section uses the same texture as the threaded section, it will be impossible to scrape all the concrete off the inside of the embedded pipe when rotating the threaded rod, leaving concrete residue on the inner wall of the embedded pipe. In this solution, the mixing section is equipped with several strip-shaped protrusions. When rotating, it scrapes off a large area of ​​the concrete from the inner wall of the embedded pipe and breaks the concrete blocks into small particles. After removing the threaded rod, the small particles remain inside the embedded pipe. When filling the embedded hole later, the concrete particles are suspended in the mortar used for filling the hole, acting as aggregate to increase the strength of the mortar, thereby bearing the concentrated stress around the embedded hole.

[0025] 5. Similarly, in order to solve the problem of fixing the pre-embedded pipe, a first limiting plate and a second limiting plate are directly added to press the end of the pre-embedded pipe against the outside of the second side mold, which can also prevent grout leakage. Attached Figure Description

[0026] Figure 1 This is a flowchart of Example 1; Figure 2 This is a schematic diagram of the elevation structure of an existing lifting scaffold. Figure 3 This is a sectional view of the top edge beam formwork in Example 1; Figure 4 for Figure 3 Cross-sectional view after installation of the embedded pipe; Figure 5 for Figure 4 Cross-sectional view after concrete pouring; Figure 6 for Figure 5 Sectional view after template removal; Figure 7 for Figure 6 Sectional view after installing nuts and washers; Figure 8 This is a three-dimensional schematic diagram of the threaded rod in Example 1; Figure 9 This is a three-dimensional schematic diagram of the threaded rod in Example 2; Figure 10This is a sectional view of the top edge beam template in Example 3. Detailed Implementation

[0027] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: attachment support 1, threaded rod 2, inner pad block 3, embedded pipe 4, main structure 5, bottom mold 6, first side mold 7, second side mold 8, second clearance hole 9, connecting block 10, base plate 11, attachment support 1, connecting plate 13, threaded hole 14, first threaded section L15, stirring section L16, second threaded section L17, strip protrusion 18, hexagonal groove 19, nut 20, first limiting plate 21, second limiting plate 22.

[0028] Example 1 A construction method for quick-release attachment supports, the flowchart is as follows: Figure 1 As shown, based on Figure 2 The existing lifting scaffold shown is being improved by the following steps: Step 1: Prepare the attachment support 1 and the fixing component. The fixing component includes a base plate 11 and a threaded rod 2. The base plate 11 is provided with a threaded hole 14. The base plate 11 is a rectangular plate, and a rubber sealing strip is bonded to the edge of the base plate 11. like Figure 8 As shown, the threaded rod 2 includes a first threaded section L15, a stirring section L16, and a second threaded section L17 arranged sequentially along its own axial direction. The first threaded section L15 is used for threaded connection with the threaded hole 14 on the base plate 11, and the second threaded section L17 is used for threaded connection with the inner pad block 3. The outer circumferential surface of the stirring section L16 has multiple strip-shaped protrusions 18 along the length of the threaded rod 2, and the stirring section L16 passes through the inner pad block 3. Figure 4 As shown, a hexagonal groove 19 is provided at the right end of the second threaded section L17. A hexagonal protrusion is integrally formed on the drill bit of the electric drill, and the shape of the hexagonal protrusion matches the shape of the hexagonal groove 19, so that a detachable connection is formed between the electric drill and the threaded rod 2.

[0029] Step 2: Pass the threaded rod 2 through the top main structure 5 within the height range of the lifting scaffold. One end of the threaded rod 2 is connected to the threaded hole 14 of the base plate 11, and the other end is finally connected to the nut 20; specifically, the following steps are included: Step 2.1, as follows Figure 3As shown, in this embodiment, the main structure 5 refers to the side beam of the building balcony. The template for installing the top-level main structure 5 is a non-standard template, including a bottom mold 6 and opposing first side molds 7 and second side molds 8. The first side mold 7 is located on the outer facade of the main structure 5. A rectangular first clearance hole is horizontally opened on the first side mold 7, and a circular second clearance hole 9 is horizontally opened on the second side mold 8. Two connecting blocks 10 are integrally formed on the outer side of the first side mold 7, both located below the first clearance hole. A base plate 11 is embedded into the first clearance hole. A horizontally arranged connecting plate 13 is integrally formed on the lower left side of the base plate 11, and the lower surface of the connecting plate 13 is bolted to the two connecting blocks 10. This allows the base plate 11 to be detachably connected to the first side mold 7, with the threaded hole 14 and the second clearance hole 9 aligned and having the same size.

[0030] Step 2.2: Prepare the inner pad block 3, the embedded pipe 4, and the nut 20. The inner pad block 3 has internal threads, and the embedded pipe 4 is a consumable. After the first threaded section L15 of the threaded rod 2 passes through the second clearance hole 9, the inner pad block 3, and the embedded pipe 4 in sequence, it is threadedly connected to the threaded hole 14 of the base plate 11. At the same time, the stirring section L16 of the threaded rod 2 passes through the inner pad block 3, and the second threaded section L17 is threadedly connected to the inner pad block 3. Rotate the inner pad block 3 so that the inner pad block 3 presses against the inner side of the second side mold 8 to form a stable support.

[0031] Step 2.3: Pour concrete for the main structure 5.

[0032] Step 3, as follows Figure 5 As shown, after the concrete is poured, the attachment support 1 located at the bottom of the lifting scaffold is removed and bolted to the base plate 11 on the top main structure 5 to form a complete attachment support 1. The base plate is thickened at the connection position and has corresponding bolt holes.

[0033] Step 4: After the concrete has hardened, as follows Figure 6 As shown, detach the connecting block 10 and connecting plate 13, remove the first side mold 7, insert the hexagonal protrusion on the drill bit of the electric drill into the hexagonal groove 19 at the end of the threaded rod 2, and the electric drill drives the threaded rod 2 to rotate, so that the end of the threaded rod 2 moves to be flush with the outer side of the inner pad block 3, and remove the second side mold 8; then, as shown... Figure 7As shown, the electric drill drives the threaded rod 2 to rotate in the opposite direction, causing this end of the threaded rod 2 to protrude relative to the outer side of the inner pad 3. The nut 20 is connected to the protruding end and tightened until it abuts against the outer side of the inner pad 3, so that the threaded rod 2 transmits the tension to the main structure 5 through the nut 20 and the inner pad 3. During the rotation of the threaded rod 2, the strip protrusions 18 on the mixing section L16 can push the solidified concrete flowing between the threaded rod 2 and the pre-embedded pipe 4 to move, so that the solidified concrete can be smoothly separated from the pre-embedded pipe 4, ensuring the normal rotation of the threaded rod 2. The threaded rod 2 includes a first threaded section L15, a mixing section L16 and a second threaded section L17 arranged sequentially along its own axial direction. The outer circumference of the mixing section L16 is provided with multiple strip protrusions 18 along the length of the threaded rod 2. A hexagonal groove 19 is opened at one end of the threaded rod 2 near the second side mold 8. The drill bit of the electric drill is provided with a hexagonal protrusion that matches the hexagonal groove 19.

[0034] Example 2 The difference between Example 2 and Example 1 is as follows: Figure 9 As shown, the height of the strip-shaped protrusion 18 of the mixing section L16 of the threaded rod 2 is the dimension along the radius of the cross-section of the mixing section L16. The height of the strip-shaped protrusion 18 changes along the axial direction of the mixing section L16. The heights at both ends of the strip-shaped protrusion 18 are greater than the height of the middle part of the strip-shaped protrusion 18, and there is a diagonal transition. Thus, during the rotation of the threaded rod 2, the peeled concrete blocks fall into the middle part of the mixing section L16, thereby reducing the resistance to the rotation of the threaded rod 2 and preventing the threaded rod 2 from getting stuck and unable to rotate.

[0035] Example 3 The difference between Example 3 and Example 2 is as follows: Figure 10 As shown, the diameter of the second clearance hole 9 is larger than the diameter of the threaded hole 14. After the left end of the pre-embedded tube 4 passes through the second clearance hole 9, it abuts against the inner side of the first side mold 7. The right end of the pre-embedded tube 4 is integrally formed with a first limiting plate 21, and the right end of the threaded rod 2 is integrally formed with a second limiting plate 22. The second limiting plate 22 abuts the first limiting plate 21 against the periphery of the second clearance hole 9 outside the second side mold 8. After the threaded rod 2 passes through the pre-embedded tube 4, it is threadedly connected to the threaded hole 14. The second clearance hole 9 and the pre-embedded tube 4 are both slidably connected to the threaded rod 2.

[0036] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A construction method for quick-release attachment supports, characterized in that... This includes the following steps: Step 1: Prepare the attachment support and fixing components. The fixing components include a base plate and a threaded rod. The base plate has threaded holes. Step 2: Pass the threaded rod through the top layer of the main structure within the height range of the lifting scaffold. Connect one end of the threaded rod to the threaded hole in the base plate and the other end to the nut. Step 3: Remove the attachment support at the bottom of the lifting scaffold and bolt the attachment support to the base plate on the top main structure.

2. The construction method for a quick-release attachment support according to claim 1, characterized in that, Step two specifically includes the following steps: Step 2.1: Install the template for the top-level main structure. The template for the main structure includes a first side mold and a second side mold that are set opposite to each other. The first side mold is located on the outer facade of the main structure. The first side mold is provided with a first clearance hole. The bottom plate is embedded in the first clearance hole and is detachably connected to the first side mold. The second side mold is provided with a second clearance hole. Step 2.2: The fixing assembly also includes a pre-embedded tube and a nut. The end of the threaded rod passes through the second clearance hole and the pre-embedded tube and is threadedly connected to the threaded hole. The nut and the other end of the threaded rod are then connected. Step 2.3: Cast the main structure.

3. The construction method of a quick-release attachment support according to claim 2, characterized in that: It also includes an electric drill; the fixing components also include an inner pad. In step 2.2, the threaded rod passes through the second clearance hole, the inner pad block and the pre-embedded pipe in sequence. The inner pad block and the threaded rod are threadedly connected. The inner pad block is rotated to make it press against the inner side of the second side mold. The process also includes step four: using an electric drill to rotate the threaded rod until it is flush with the outer side of the inner pad block, and removing the second side mold; using the electric drill to rotate the threaded rod in the opposite direction until it protrudes relative to the outer side of the inner pad block, connecting the nut to the end of the threaded rod, and the threaded rod transmits the tension to the main structure through the nut.

4. The construction method of a quick-release attachment support according to claim 3, characterized in that: The threaded rod has a polygonal groove at one end near the second side mold, and the drill bit of the electric drill has a polygonal protrusion that matches the polygonal groove.

5. The construction method of a quick-release attachment support according to claim 4, characterized in that: The threaded rod has a first threaded section and a second threaded section at both ends. The first threaded section is used to connect with the threaded hole, and the second threaded section is used to connect with the inner pad block. A stirring section is provided between the first threaded section and the second threaded section. The stirring section has several strip-shaped protrusions in the circumferential direction. The strip-shaped protrusions are arranged along the length of the threaded rod. The strip-shaped protrusions are used to push the solidified concrete that flows into the space between the threaded rod and the embedded pipe to move, thereby separating the solidified concrete from the embedded pipe.

6. The construction method of a quick-release attachment support according to claim 5, characterized in that: The mixing section is used to pass through the inner pad block.

7. The construction method of a quick-release attachment support according to claim 6, characterized in that: A connecting block is provided on the outer side of the first side mold, and the connecting block is located below the first clearance hole; in step 2.1, the base plate and the connecting block are bolted together.

8. The construction method of a quick-release attachment support according to claim 2, characterized in that: The diameter of the second clearance hole is larger than that of the threaded hole. One end of the pre-embedded tube passes through the second clearance hole and abuts against the inner side of the first side mold. The other end of the pre-embedded tube is provided with a first limiting plate. The end of the threaded rod away from the first side mold is provided with a second limiting plate. The second limiting plate abuts the first limiting plate against the periphery of the second clearance hole on the outer side of the second side mold. The threaded rod passes through the pre-embedded tube and is threadedly connected to the threaded hole. The second clearance hole, the pre-embedded tube and the threaded rod are slidably connected.

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