Method for dismantling and reassembling formwork for wave-dissipating and foundation-retaining blocks

Abstract

To provide a dismantling and re-assembling method for formwork of a wave-dissipating base-solidifying block which can be constructed safely in a short time.SOLUTION: A method for dismantling and re-assembling the formwork of a wave-dissipating base-solidifying block, wherein the wave-dissipating base-solidifying block has a lower block, an upper block, four side blocks, and a central block, each being substantially cubic; and the formwork consists of a bottom plate that contacts the lower surface of the lower block, four lower L-shaped plates, four horizontal plates, four side L-shaped plates, a width stop frame, and two upper L-shaped plates; and during dismantling, all members constituting the formwork do not need to be dismantled and removed, whereby the dismantling work is shortened; and during re-assembling, the members constituting the formwork are lifted using a lifting frame or the like and assembled in a suspended state, whereby scaffolding becomes unnecessary.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a method for disassembling and reassembling a formwork of a wave-dissipating and foundation-blocking block.

Background Art

[0002] Conventionally, wave-dissipating and foundation-blocking blocks made of concrete blocks have been widely used for the purpose of shore protection and water control such as on coasts and rivers. The wave-dissipating and foundation-blocking blocks are designed in various shapes to efficiently absorb the energy of waves. Among them, there is a six-leg block formed by combining substantially cubic blocks (Fig. 1). The six-leg block has substantially cubic lower blocks 11, four side blocks 12, an upper block 13, and a central block 14, and has a shape in which the lower block 11 projects from the bottom surface of the central block 14, the side blocks 12 project from the four side surfaces, and the upper block 13 projects from the upper surface.

[0003] The wave-dissipating and foundation-blocking block is a concrete block, and is formed by placing and curing concrete in an assembled formwork. At this time, in the case of the six-leg block, as shown in Fig. 2, with the lower block 11 standing as a leg, the formwork is assembled, the concrete is placed and cured, and the formwork is disassembled. The formwork for the six-leg block includes a bottom plate 2 located on the lower surface of the lower block 11, a lower L-shaped plate 3 located substantially L-shaped along the side surface of the lower block 11 and the bottom surface of the side block 12 and connectable to the bottom plate 2, four horizontal plates 4 located on the end surfaces parallel to the protruding surface from the central block 14 of the side block 12, four side L-shaped plates 5 located substantially L-shaped along the side surfaces of adjacent side blocks 12 and connectable to the lower L-shaped plate 3 and the horizontal plates 4, a width stopper frame 6 located along the bottom edge of the upper block 13 and engaging with the four side L-shaped plates, and two upper L-shaped plates 7 located substantially L-shaped along two adjacent side surfaces among the four side surfaces of the upper block 13. Bolts 81 and nuts 82 are used for connecting adjacent members.

[0004] Traditionally, when dismantling these formworks, the width-retaining frame 6 was removed first, followed by the removal of all the formwork from the wave-dissipating and stabilizing block 1 in the following order: upper L-plate 7, horizontal plate 4, side L-plate 5, and lower L-plate 3. In particular, when removing some of the lower L-plates 3, the wave-dissipating and stabilizing block 1 became unstable and there was a risk of it tipping over. Working under the wave-dissipating and stabilizing block 1 was dangerous, so scaffolding was necessary to prevent the wave-dissipating and stabilizing block 1 from tipping over. Furthermore, when assembling the formwork, all components are assembled from the bottom up, but since empty formwork is unstable, scaffolding was necessary for the assembly work on the upper part. [Overview of the project] [Problems that the invention aims to solve]

[0005] As mentioned above, conventional methods of dismantling and assembling formwork require scaffolding, which necessitates the construction and installation of that scaffolding. Furthermore, the dismantling and reassembly process took a considerable amount of time because all the components had to be removed and reassembled.

[0006] The present invention aims to provide a method for dismantling and reassembling formwork for wave-dissipating and foundation-retaining blocks that can be constructed safely in a short amount of time. [Means for solving the problem]

[0007] The present invention, made to achieve the above objective, is a method for dismantling and reassembling the formwork of a wave-dissipating foundation block, wherein the wave-dissipating foundation block has a substantially cubic lower block, an upper block, four side blocks, and a central block, and is a six-legged block with the lower block protruding from the bottom surface of the central block, the upper block from the top surface, and the side blocks from the four sides of the side, respectively, and the formwork has a bottom plate in contact with the bottom surface of the lower block, and four lower L plates that are in contact with the sides of the lower block and the bottom surface of the side blocks and can be connected to the bottom plate. The upper block consists of four horizontal plates that contact the end faces of the side blocks parallel to the protruding surfaces from the central block, four side L plates that contact the sides of adjacent side blocks and can be connected to the lower L plate and the horizontal plates, a width-retaining frame that is positioned along the bottom edge of the upper block and engages with the four side L plates, and two upper L plates that contact two adjacent sides of the four sides of the upper block, and the process involves (1) lifting the width-retaining frame and removing it from the four side L plates, and (2) lifting the two connected upper L plates and removing them from the upper block. (3) The process of releasing the connection between the bottom plate and the lower L plate, lifting the wave-dissipating foundation block together with the four lower L plates, four horizontal plates, and four side L plates, removing the bottom plate and lowering it, (4) The process of connecting the four horizontal plates and four side L plates to a formwork lifting frame which is roughly rectangular in plan view via wires, (5) The process of releasing the connection between the lower L plate and the horizontal plates and the two side L plates located diagonally opposite the wave-dissipating foundation block and the horizontal plate, lifting the formwork lifting frame, and releasing the connection between the two horizontal plates and the horizontal plates. (6) Lifting the side L-shaped plate, the remaining two side L-shaped plates and the four horizontal plates connected thereto, removing them from the side block, and while they are suspended from the formwork lifting frame, reconnecting the two side L-shaped plates that were disconnected from the horizontal plates to the horizontal plates; (7) Dropping the four lower L-shaped plates that are in contact with the bottom surface of the side block downwards to create a space between the bottom surface of the side block and the top surfaces of the four lower L-shaped plates; (8) Lifting the wave-dissipating foundation block with a sling belt inserted into the space, and removing the four lower L-shaped plates from the lower block.(8) Lifting the four lower L-shaped plates and lowering them onto the base plate to connect the base plate and the lower L-shaped plates; (9) Lowering the four side L-shaped plates and four horizontal plates, which were reconnected in step (5), onto the four lower L-shaped plates to connect the lower L-shaped plates, the horizontal plates, and the side L-shaped plates; (10) Lowering the width-retaining frame and engaging it with the four side L-shaped plates; and (11) Lowering the two upper L-shaped plates into the width-retaining frame. The formwork suspension frame may be larger than the wave-dissipating foundation block in a plan view. [Effects of the Invention]

[0008] The present invention, by means of solving the above-mentioned problems, can achieve at least one of the following effects. (1) The components that make up the formwork are lifted by a suspension frame or the like and assembled while suspended, so scaffolding is not required, and the construction and installation work process for scaffolding is also eliminated. (2) Since all the components that make up the formwork do not need to be dismantled and removed, the dismantling work is shortened. (3) The formwork lifting frame used to suspend the horizontal boards and side L-shaped boards is larger than the wave-dissipating and foundation-retaining blocks in plan view, so that each component does not interfere with one another and can be lifted so that it spreads out relative to the wave-dissipating and foundation-retaining blocks. [Brief explanation of the drawing]

[0009] [Figure 1] Perspective view of wave-dissipating and foundation-retaining blocks [Figure 2] Perspective view of wave-dissipating foundation block and formwork [Figure 3] Deconstructed perspective view of the formwork [Figure 4] Diagram (1) illustrating the method for dismantling and reassembling the formwork of the wave-dissipating and foundation-retaining block of the present invention. [Figure 5] Diagram (2) illustrating the method for dismantling and reassembling the formwork of the wave-dissipating and foundation-retaining block of the present invention. [Figure 6] Diagram (3) illustrating the method for dismantling and reassembling the formwork of the wave-dissipating and foundation-retaining block of the present invention. [Figure 7]Diagram (4) illustrating the method for dismantling and reassembling the formwork of the wave-dissipating and foundation-retaining block of the present invention. [Figure 8] Diagram (5) illustrating the method for dismantling and reassembling the formwork of the wave-dissipating and foundation-retaining block of the present invention. [Figure 9] Diagram (6) illustrating the method for dismantling and reassembling the formwork of the wave-dissipating and foundation-retaining block of the present invention. [Figure 10] Diagram (7) illustrating the method for dismantling and reassembling the formwork of the wave-dissipating and foundation-retaining block of the present invention. [Figure 11] Diagram (8) illustrating the method for dismantling and reassembling the formwork of the wave-dissipating and foundation-retaining block of the present invention. [Modes for carrying out the invention]

[0010] The following describes in detail the method for dismantling and reassembling the formwork of the wave-dissipating and foundation-retaining block of the present invention, with reference to the drawings.

[0011] [Example 1] (1) Wave-dissipating and root-retaining blocks As described above, the wave-dissipating and root-retaining block 1 that is the subject of the present invention is a hexagonal block, each having a roughly cubic lower block 11, four side blocks 12, an upper block 13, and a central block 14, with the lower block 11 protruding from the bottom surface of the central block 14, the side blocks 12 protruding from the four sides, and the upper block 13 protruding from the top surface (Figure 1).

[0012] (2) Formwork The formwork used in the method for disassembling and reassembling the formwork of the wave-dissipating and root-fixing block of the present invention is the one conventionally used when forming a six-legged block. As described above, a bottom plate 2 located on the lower surface of the lower block 11, a lower L-shaped plate 3 located substantially in an L-shape along the side surface of the lower block 11 and the bottom surface of the side block 12 and connectable to the bottom plate 2, four horizontal plates 4 located on end faces parallel to the protruding surface from the central block 14 of the side block 12, four side L-shaped plates 5 located substantially in an L-shape along the side surfaces of adjacent side blocks 12 and connectable to the lower L-shaped plate 3 and the horizontal plates 4, a width-limiting frame 6 located along the bottom edge of the upper block 13 and engaging with the four side L-shaped plates, and two upper L-shaped plates 7 located substantially in an L-shape along two adjacent side surfaces among the four side surfaces of the upper block 13 (Figs. 2 and 3). Bolts 81 and nuts 82 are used for connecting adjacent members of the formwork. By loosening the bolts 81 and nuts 82 to disassemble, it can be reused for forming a new wave-dissipating and root-fixing block 1.

[0013] (3) Method for Disassembling and Reassembling the Formwork of the Wave-Dissipating and Root-Fixing Block The method for disassembling and reassembling the formwork of the wave-dissipating and root-fixing block of the present invention is to disassemble the formwork used for forming the wave-dissipating and root-fixing block 1 and reassemble it for forming a new wave-dissipating and root-fixing block 1.

[0014] (4) Removal of the Width-Limiting Frame First, lift and remove the width-limiting frame 6 located along the bottom edge of the upper block 13 and engaging with the four side L-shaped plates.

[0015] (5) Removal of the Upper L-Shaped Plate After removing the width-limiting frame 6, simultaneously lift the two connected upper L-shaped plates 7 and remove them from the upper block 13 of the wave-dissipating and root-fixing block 1 (Fig. 4). When lifting, loosen the nut 82 to create a gap between the two upper L-shaped plates 7, but the two upper plates 7 will not be separated and can be easily lifted. Tighten the nut 82 again with the two removed upper L-shaped plates still hanging to assemble. The assembled upper L-shaped plates 7 are appropriately placed on the ground or the like.

[0016] (6) Removal of the bottom plate The nuts 82 are removed from the bolts 81 connecting the base plate 2 and the lower L-plate 3 to release the connection, and the wave-dissipating foundation block 1, along with the four lower L-plates 3, four horizontal plates 4, and four side L-plates 5 that are connected to each other, is lifted and placed in another location, and the base plate 2 is removed (Figure 5). Because the wave-dissipating foundation block 1 is heavy, a lifting frame 91 is used for lifting, and the block is lifted using wires 92 that are wrapped around the bottom of each of the four side blocks 12. The removed bottom plate 2 will be reused, so clean it as needed.

[0017] (7) Connection of the formwork suspension frame, horizontal boards, and side L-shaped boards. After removing the bottom plate 2, the four horizontal plates 4 and the four side L-shaped plates 5 are connected to a wire 92 that is connected at the top to a formwork suspension frame 93 which is roughly rectangular in plan view (Figure 6). The formwork suspension frame 93 is larger than the wave-dissipating foundation block 1 in plan view, and the horizontal plate 4 and side L-shaped plate 5 are suspended outward by wires 92.

[0018] (8) Lifting the horizontal boards and side L-shaped boards The nuts 82 are removed from the bolts 81 connecting the horizontal plate 4, the side L-shaped plate 5, and the lower L-shaped plate 3, which are connected to the formwork suspension frame 93 via wire 92, thereby releasing the connection. In addition, the connection between the two side L-shaped plates 5 and the horizontal plate 4, which are located diagonally opposite to the wave-dissipating foundation block 1, is released. The nuts 82 on the bolts 81 connecting the remaining two side L-shaped plates 5 and the horizontal plate 4 do not need to be loosened, thus shortening the dismantling work. Then, the formwork suspension frame 93 is raised to lift the horizontal board 4 and the side L-shaped board 5 (Figure 7). At this time, the two diagonally opposite side L-shaped boards 5 are each lifted as two separate members, while the remaining two side L-shaped boards 5 and the horizontal board 4 are lifted as two separate members, with two horizontal boards 4 connected to each end of one side L-shaped board 5. Since the formwork suspension frame 93 is larger than the wave-dissipating and stabilizing block 1 in plan view, each member does not interfere with one another and is lifted so as to spread out relative to the wave-dissipating and stabilizing block 1 before being removed from the wave-dissipating and stabilizing block 1. The four removed horizontal boards 4 and side L-shaped boards 5 are reassembled by fastening the bolts 81 and nuts 82 again while the horizontal boards 4 and side L-shaped boards 5 remain suspended. Because the assembly is done while the components are suspended, scaffolding is not required, and the construction and installation work for scaffolding is eliminated. In addition, since only the components that were detached are reassembled, the assembly work is also shortened.

[0019] (9) Lifting of wave-dissipating and foundation-retaining blocks With the horizontal plate 4 and side L-shaped plate 5 removed, the lower L-shaped plate 3 surrounding the lower block 11 of the wave-dissipating and foundation-retaining block 1 is floating about the thickness of the bottom plate 2 because the bottom plate 2 has been removed (Figure 8(a)). Then, by loosening the nut 82 and dropping it downwards by tapping it with a hammer, a space S is created between the bottom surface of the side block 12 of the wave-dissipating and foundation-retaining block 1 and the top surface of the lower L-shaped plate 3 (Figure 8(b)). By only loosening the nut 82 and not removing it from the bolt 81, the four lower L-shaped plates 3 remain as one unit. Then, the wave-dissipating and foundation-retaining block 1 is lifted by passing a sling belt 94, whose upper end is connected to the suspension frame 91, through the space S below the four side blocks 12, and the lower L-plate 3 is removed from the lower block 11 (Figure 9). The lower L-shaped plate 3, which was removed from the wave-dissipating foundation block 1, is reassembled by tightening the nuts 82 again. The four lower L-shaped plates 3 remain as one unit even with the nuts 82 loosened, making assembly easy.

[0020] (10) Connection of the base plate and the lower L plate The four reassembled lower L-shaped plates 3 are lifted up and lowered onto the removed base plate 2, and the base plate 2 and the lower L-shaped plates 3 are connected via bolts 81 and nuts 82.

[0021] (11) Connection of the lower L-shaped plate, the horizontal plate, and the side L-shaped plate The reassembled horizontal board 4 and side L-shaped board 5 are lifted by the formwork suspension frame 93 and lowered onto the lower L-shaped board 3, connecting the lower L-shaped board 3 with the horizontal board 4 and side L-shaped board 5 (Figure 10). Since the horizontal board 4 and side L-shaped board 5 are connected to the lower L-shaped board 3 while suspended in their assembled state, the construction of scaffolding is unnecessary.

[0022] (12) Engaging the width-retaining frame and lowering the upper L-shaped plate. The width-retaining frame 6 is suspended and engaged with the side L-plate 5, which is connected to the lower L-plate 3. Then, the two upper L-shaped plates 7 are suspended from within the width-retaining frame 6, completing the formwork assembly (Figure 11). These suspension operations do not require the fastening of bolts 81 and nuts 83, nor do they require the construction of scaffolding. [Explanation of Symbols]

[0023] 1 wave-dissipating and foundation-retaining block, 11 lower block, 12 side block, 13 upper block, 14 central block 2 Bottom plate 3 Lower L plate 4 horizontal board 5 Side L plate 6. Width-retaining frame 7 Upper L plate 81 Bolt, 82 Nut

Claims

1. A method for dismantling and reassembling the formwork of wave-dissipating and foundation-retaining blocks, The wave-dissipating and foundation-retaining block is a six-legged block having a roughly cubic lower block, an upper block, four side blocks, and a central block, with the lower block protruding from the bottom surface of the central block, the upper block from the top surface, and the side blocks from the four sides. The aforementioned formwork is A bottom plate in contact with the lower surface of the lower block, Four lower L-shaped plates that are in contact with the side surface of the lower block and the bottom surface of the side block, and that can be connected to the bottom plate, Four horizontal plates are in contact with the end faces of the side block that are parallel to the protruding surface from the central block, Four side L-shaped plates that are in contact with the sides of adjacent side blocks and can be connected to the lower L-shaped plate and the horizontal plate, A width-retaining frame positioned along the bottom edge of the upper block and engaging with the four side L-shaped plates, It consists of two upper L-shaped plates that are in contact with two adjacent sides of the four sides of the upper block, (1) The step of lifting the width-retaining frame and removing it from the four side L-shaped plates, (2) The step of lifting the two connected upper L-shaped plates and removing them from the upper block, (3) The process of releasing the connection between the bottom plate and the lower L plate, lifting the wave-dissipating foundation block together with the four lower L plates, the four side plates, and the four side L plates, removing the bottom plate and lowering it, (4) A step of connecting the four horizontal plates and the four side L plates to a formwork suspension frame which is roughly rectangular in plan view via wires, (5) Connecting the lower L-shaped plate, the horizontal plate, and the side L-shaped plate, disconnecting the two side L-shaped plates located diagonally to the wave-dissipating foundation block from the horizontal plate, lifting the formwork suspension frame, lifting the two side L-shaped plates that have been disconnected from the horizontal plate, and the remaining two side L-shaped plates and the four horizontal plates connected to them, removing them from the side block, and while they are suspended from the formwork suspension frame, reconnecting the two side L-shaped plates that have been disconnected from the horizontal plate to the horizontal plate, (6) The step of dropping the four lower L-shaped plates that are in contact with the bottom surface of the side block downward to create a space between the bottom surface of the side block and the upper surfaces of the four lower L-shaped plates, (7) The step of lifting the wave-dissipating foundation block with a sling belt inserted into the space and removing the four lower L plates from the lower block, (8) The steps of lifting the four lower L-shaped plates and lowering them onto the base plate to connect the base plate and the lower L-shaped plates, (9) The step of suspending the four side L-shaped plates and the four horizontal plates that were reconnected in step (5) above onto the four lower L-shaped plates, thereby connecting the lower L-shaped plates with the horizontal plates and the side L-shaped plates, (10) The step of suspending the width-retaining frame and engaging it with the four side L-plates, (11) The process of lowering the two upper L-shaped plates into the width-retaining frame is characterized by comprising the steps of: Method for dismantling and reassembling formwork for wave-dissipating and foundation-retaining blocks.

2. The formwork suspension frame is characterized by being larger than the wave-dissipating foundation block in a plan view. A method for dismantling and reassembling the formwork of a wave-dissipating and foundation-retaining block as described in claim 1.

Images