Construction method for wall body

Abstract

To provide a construction method for a wall body, etc. that can fix a formwork when filling filler material into joints, and that can minimize interference with construction work, etc., on one side of the wall body.SOLUTION: Precast blocks 10 having a block body 11 made of concrete and a plate 12 provided on one surface of the block body 11 and projecting upward from the block body 11 are stacked vertically. Using the plate 12 as a formwork, filler material is filled between upper and lower precast blocks 10 to form a joint 2, thereby constructing a dike from bottom to top in sequence. The upper precast block 10 is hung down with an upper part of a fixing jig 20 attached to a mounting portion 13 embedded in one surface of the block body 11, and positioned above the lower precast block 10. During filling with the filler material, the plate 12 is fixed by a lower part of the fixing jig 20. After forming the joint 2, the fixing jig 20 is pulled up and removed from above the constructed dike.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a method for constructing a wall. [Background technology]

[0002] Walls are sometimes constructed by arranging concrete precast blocks one above the other. For example, Patent Documents 1 and 2 describe an example of the construction of a dike for an LNG (Liquefied Natural Gas) tank, in which concrete precast blocks are arranged one above the other and a filler material is filled between the upper and lower precast blocks to form a joint. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5837118 [Patent Document 2] Patent No. 5837130 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Documents 1 and 2, plates attached to the precast blocks in advance are used as the inner formwork when filling the filler. If these plates bend inward toward the dike when filling the filler, there is a risk of the filler leaking to the inside.

[0005] To prevent this, it is possible to install a plate fixing jig inside the dike. However, the fixing jig becomes a protrusion on the inner surface of the dike, which interferes with construction work inside the dike (for example, air raising of a steel roof).

[0006] Even if the fixing jigs are removed after the joints are formed, removing them normally requires scaffolding inside the dike, which interferes with the equipment work inside the dike. This equipment work is mechanical work, and is a different type of work from the dike construction (civil engineering work), so from the perspective of shortening the construction period, it is desirable to carry out work related to the fixing jigs in a way that interferes as little as possible with the equipment work inside the dike.

[0007] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a method for constructing a wall that can fix the formwork when filling the joints with filler and that can minimize interference with construction work on one side of the wall. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the present invention provides a wall construction method in which precast blocks each having a concrete block body and a plate attached to one side of the block body and protruding upward from the block body are stacked one above the other, the plate is used as a formwork, and a wall is constructed in order from bottom to top by filling the spaces between the upper and lower precast blocks to form joints, wherein the upper precast block is lowered and placed on top of the lower precast block with the upper part of a fixing jig attached to a mounting part embedded in the one side of the block body, the plate is fixed by the fixing jig when the filler is filled, and after the joints are formed, the fixing jig is pulled up and removed from above the constructed wall.

[0009] According to the present invention, when a plate is used as a formwork on one side and filler material is filled between the upper and lower blocks to form a joint, the plate is fixed using a fixing jig, thereby preventing deformation during filling. Furthermore, by removing the fixing jig after the joint is formed, it is possible to prevent the fixing jig from interfering with construction work on one side of the wall. The fixing jig is removed by lifting it from above the constructed wall, so it does not interfere with construction work on the other side of the wall.

[0010] When fixing the plate with the fixing jig, it is desirable to press the fixing jig against the plate using a pressing tool, and after the joint is formed, to pull up and remove the pressing tool from above the constructed wall body. The pressing tool can reliably prevent deformation of the plate. In addition, like the fixing jig, the pressing tool can be removed by lifting it up from above the constructed wall.

[0011] For example, the mounting portion is a box-shaped member and has a convex opening on its front surface located on one side of the block body, the fixing jig has an inverted L-shaped jig body having a horizontal portion that is placed through the top of the opening and a vertical portion for fixing the plate, a locking portion that is arranged at the tip of the horizontal portion so as to be perpendicular to the horizontal portion in a plan view, is arranged in the internal space of the mounting portion and locks onto the front surface, and a protrusion that protrudes upward from the jig body, and the pressing tool is arranged between the protrusion and the block body. The pressing tool may be, for example, a wedge, and the protrusion may be inclined so as to move away from the block body as it goes upward. Alternatively, the pressing tool may be an elastic body, and the restoring force of the pressing tool may be used to press the fixing jig against the plate. This allows the fixing jig to be pressed against the plate side easily and reliably, and also makes it easy to remove the fixing jig and pressing tool.

[0012] It is also preferable that the fixing jig is attached to the attachment portion using a mounting fixture, and that after the joint is formed, the mounting fixture is pulled up and removed from above the constructed wall body. The fixture can be securely attached to the mounting portion using the above-mentioned mounting fixture. Like the fixing jig, the mounting fixture can also be removed by lifting it up from above the constructed wall.

[0013] For example, the mounting portion is a box-shaped member that has a long hole on its front surface located on one side of the block main body, the fixing jig has a vertical plate on the top that is arranged along the front surface, the mounting device is a member that has arms on both ends of an axial portion that is passed through the long hole and the hole in the vertical plate, and the arms extend in a direction perpendicular to the axial portion, and the fixing jig is attached to the mounting portion by engaging the arm on the mounting portion side with the front surface and the vertical plate with the arm on the vertical plate side, and when the mounting device is to be removed, the arm on the vertical plate side is pulled up from above the constructed wall body and the arms on both ends of the axial portion are rotated in a vertical plane, and the extension direction of the arm on the mounting portion side is aligned with the long hole and the arm is removed from the long hole. Alternatively, the mounting portion may be a bracket provided in the internal space of a box-shaped member, with an opening on the front surface located on one side of the block body, the fixing jig having a protrusion that is inserted into the internal space through the opening and positioned so as to overlap with the bracket, the mounting fixture being a pin that is passed through the protrusion and the bracket, and when removing the mounting fixture, the pin may be pulled from above the constructed wall body to remove it from the protrusion and the bracket. This allows the fixing jig to be easily and reliably attached to the attachment portion, and also makes it easy to remove the fixing jig and attachment. [Effects of the Invention]

[0014] The present invention provides a method for constructing a wall that can fix the formwork when filling the joints with filler and can minimize interference with construction work on one side of the wall. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a diagram showing an LNG tank 100. FIG. [Figure 2] A diagram showing the liquid barrier 1. [Figure 3] A diagram showing how to construct a flood barrier 1. [Figure 4] FIG. 2 is a diagram showing a fixing jig 20 and a mounting portion 13. [Figure 5]10A and 10B are diagrams illustrating removal of the wedge 40 and the fixing jig 20. FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] A diagram showing how to construct a flood barrier 1. [Figure 9] 1 is a diagram showing a fixing jig 200, a mounting portion 130, and a mounting fixture 60. FIG. [Figure 10] FIG. 10 is a diagram showing fixing jigs 200a and 200b, a mounting portion 130a, and a pin 60a. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0017] [First embodiment] (1.Dike 1) FIG. 1 is a diagram showing an LNG tank 100 including a dike 1, which is a wall constructed by a construction method according to an embodiment of the present invention. The LNG tank 100 is an above-ground tank for storing LNG, with the dike 1 installed on a bottom slab 5, and an inner tank and an outer tank made of metal plates or the like installed inside the dike 1. The dike 1 is installed to prevent LNG from leaking to the outside even if the inner tank or outer tank is damaged. Reference numeral 4 in the figure denotes a steel roof installed on top of the inner tank and outer tank.

[0018] The plane of the dike 1 is circular according to the diameter of the tank. The dike 1 is constructed by arranging concrete precast blocks (hereinafter simply referred to as blocks) 10 on the left and right sides of the periphery of the dike 1 and stacking them in upper and lower layers, and forming joints 2 between adjacent blocks 10 on the left, right, and up and down.

[0019] 2 is a diagram showing a vertical cross section along the thickness direction of the dike 1. As shown in FIG. 2, the block 10 has a block body 11, a plate 12, and the like.

[0020] The block body 11 is a rectangular plate-shaped member made of concrete. A mounting portion for attaching a fixing jig for the plate 12 is embedded in the inner surface (one side) of the block body 11. Details of the fixing jig and the mounting portion will be described later. The "inner surface" refers to the inner surface of the tank. The inside of the tank corresponds to the right side of Figure 2.

[0021] The plate 12 is a metal plate provided on the inner surface of the block body 11. The plate 12 is provided on the upper part of the block body 11 and protrudes upward from the block body 11. Note that the topmost block 10 (10a) of the dike 1 does not have a plate 12.

[0022] The joint 2 is formed by filling the space between the upper and lower blocks 10 with a filler such as mortar or concrete. However, the filler is not limited to these.

[0023] (2. Construction method of flood barrier 1) In this embodiment, the upper block 10 is lowered by a crane or the like and placed on top of the lower block 10, and the process of forming joints 2 between the upper and lower blocks 10 is repeated to construct the liquid barrier 1 shown in Figure 2 from bottom to top.

[0024] 3 shows the above process, focusing on the vicinity of the plate 12 of the lower block 10. In this embodiment, as shown in FIG. 3(a), the upper block 10 is lowered with the upper part of the fixing jig 20 attached to the mounting portion 13.

[0025] The mounting portion 13 is a box-shaped member embedded in the inner surface of the block body 11 , and a front surface 131 located on the inner surface side is exposed on the inner surface of the block body 11 .

[0026] Fig. 4 is a perspective view showing the fixing jig 20 and the mounting portion 13. As shown in Fig. 4, a front surface 131 of the mounting portion 13 has an opening 132 that is convex in front view. In addition, a bottom surface 133 of the mounting portion 13 is inclined downward as it approaches the front surface 131.

[0027] On the other hand, the fixing jig 20 has a jig body 21, a locking portion 22, a protruding portion 23, and the like.

[0028] The jig body 21 is a plate-like member shaped like an upside-down L, having a horizontal portion 211 and a vertical portion 212, and is disposed with the plate surface oriented vertically. A protrusion 213 that protrudes toward the block body 11 is provided at the bottom of the vertical portion 212. In the example of FIG. 4, the protrusion 213 is trapezoidal, but the shape of the protrusion 213 is not particularly limited.

[0029] The locking portion 22 is provided at the tip of the horizontal portion 211. The locking portion 22 is a rod-shaped member that is arranged so as to be perpendicular to the horizontal portion 211 in a plan view. In this embodiment, the locking portion 22 is cylindrical, but is not limited to this. The locking portion 22 is attached to the tip of the horizontal portion 211 at the center in the longitudinal direction.

[0030] The protruding portion 23 is a member that protrudes upward from the jig body 21. In this embodiment, the protruding portion 23 is an arc-shaped plate member provided at the end of the horizontal portion 211 on the vertical portion 212 side, with its upper portion protruding upward from the jig body 21 and inclining so as to move away from the block body 11 as it goes upward.

[0031] As shown by arrow a, the horizontal portion 211 and the locking portion 22 at its tip are inserted into the internal space of the mounting portion 13 from the bottom of the opening 132, and the horizontal portion 211 is passed through the narrow portion at the top of the opening 132, thereby allowing the locking portion 22 to be locked to the front surface 131 of the mounting portion 13, as shown in FIG. 3(a). The protruding portion 23 is located outside the mounting portion 13. As shown in FIG. 4, the protruding portion 23 extends in the same direction as the locking portion 22, and by arranging the locking portion 22 and the protruding portion 23 so as to sandwich the front surface 131 of the mounting portion 13 between them as shown in FIG. 3(a), wobbling of the fixing jig 20 in the plane is prevented.

[0032] 3(a) denotes a hole provided in a corner of the L-shape of the jig body 21, and when the upper block 10 is lowered, the fixing jig 20 is supported by hanging a hanging member 30 attached to the upper end of the block body 11 of the upper block 10 through the hole 214. At this time, the vertical portion 212 of the fixing jig 20 is slightly tilted relative to the vertical direction so that the lower end is away from the block body 11. However, the method of supporting the fixing jig 20 by hanging is not limited to this.

[0033] In this state, the upper block 10 is placed on top of the lower block 10, as shown in Figure 3(b). A recess 111 is provided at the bottom of the inner surface of the block body 11, and when the upper block 10 is placed on top of the lower block 10, the plate 12 of the lower block 10 is placed in the recess 111 of the upper block 10, so that no protrusions due to the plate 12 are created on the inner surface of the liquid barrier 1.

[0034] 3(c), a wedge 40, which is a pressing tool, is inserted and positioned between the block body 11 of the upper block 10 and the protruding portion 23 of the fixing jig 20, and the fixing jig 20 is rotated to orient its vertical portion 212 vertically, and the protrusion 213 of the vertical portion 212 toward the plate 12 of the lower block 10. The wedge 40 can be inserted by, for example, being suspended from a crane or the like by a hanging member 50 (see FIG. 5 described later) and a wire (not shown) separately attached to the wedge 40 being pushed downward by a worker outside the dike 1 or a worker positioned above the block 10 adjacent to the lower block 10 in the circumferential direction of the dike 1, but the method of inserting the wedge 40 is not limited to this.

[0035] In this way, the plate 12 is fixed by the fixing jig 20, and with its deformation prevented, the plate 12 is used as one side of the formwork (inner formwork), and other necessary formwork (such as outer formwork) not shown is placed, and filler material is filled between the upper and lower blocks 10 to form the joint 2.

[0036] Thereafter, the wedge 40 and the fixing jig 20 are pulled up from above the constructed flood barrier 1 (above the upper block 10), removed, and recovered.

[0037] Here, as shown in the left diagram of Figure 5, a worker positioned above the constructed flood barrier 1 holds the hanger 30 of the fixing jig 20 and the hanger 50 of the wedge 40, and uses the hanger 50 to pull up and remove the wedge 40, then loosens the hanger 30. As a result, as shown by arrow b in Figure 3(d), the locking portion 22 of the fixing jig 20 descends and slides down along the bottom surface 133 of the mounting portion 13, slipping out from the bottom of the opening 132 and detaching the fixing jig 20 from the mounting portion 13. Thereafter, as shown in the right diagram of Figure 5, the fixing jig 20 is pulled up and removed by the hanger 30. Note that reference numeral 6 in Figure 5 denotes scaffolding set up on the outside of the flood barrier 1.

[0038] The above steps are repeated at each position around the periphery of the levee 1, and the blocks 10 are stacked one on top of the other to construct the levee 1.

[0039] As described above, according to this embodiment, when the plate 12 is used as an inner formwork and filler material is filled between the upper and lower blocks 10 to form the joints 2, the plate 12 is fixed using the fixing jig 20, thereby preventing deformation when the filler material is filled. Furthermore, by removing the fixing jig 20 after the joints 2 are formed, it is possible to prevent the fixing jig 20 from interfering with construction work inside the dike 1. The work of removing the fixing jig 20 is performed by pulling the fixing jig 20 up from above the constructed dike 1, so it does not interfere with construction work inside the dike 1.

[0040] Furthermore, in this embodiment, the wedge 40 presses the fixing jig 20 against the plate 12, thereby reliably preventing deformation of the plate 12. Like the fixing jig 20, this wedge 40 can also be removed by pulling it up from above the constructed liquid barrier levee 1. Furthermore, due to the configuration of the mounting portion 13 and fixing jig 20 described above, the fixing jig 20 can be easily and reliably pressed against the plate 12 by the wedge 40, and the fixing jig 20 and the wedge 40 can also be easily removed.

[0041] However, the present invention is not limited to the above-described embodiment. For example, the shape of the fixing jig 20 is not limited to the above-described embodiment. As an example, as shown in fixing jig 20a in FIG. 6, protrusion 23a does not have to be an arc-shaped member, and the upper portion of the jig body 21 may be linearly inclined. In this case, as in the example of FIG. 3(c), a wedge 40 can be used to press protrusion 213 of vertical portion 212 against plate 12 of the lower block 10.

[0042] Furthermore, in this embodiment, a wedge 40 is used as the pressing tool, but an elastic body may be used instead of the wedge 40. An example of this is the leaf spring 40a shown in FIG. 7(a). In this example, a bent leaf spring 40a is bound by a binding material 41 attached to one end thereof and is placed between the block main body 11 and the protruding portion 23b of the fixing jig 20b. At the other end of the leaf spring 40a, an operating wire 42 is attached to the binding material 41. Note that the protruding portion 23b of the fixing jig 20b does not have an inclination like the protruding portions 23 and 23a.

[0043] In this state, the upper block 10 is lowered and placed on top of the lower block 10. Then, a worker positioned on the scaffolding 6 or the like pulls up the wire 42, detaching the other end of the leaf spring 40a from the binding material 41 as shown in FIG. 7(b), and releasing the binding material 41 from the leaf spring 40a. This causes the leaf spring 40a to expand due to its restoring force, pushing against the protruding portion 23b and rotating the fixing jig 20b, so that the protrusion 213 of the vertical portion 212 is pressed against the plate 12. The leaf spring 40a can be removed by using the wire 42 to pull up the leaf spring 40a from above the constructed flood barrier 1, similar to the wedge 40. Alternatively, the other end of the leaf spring 40a may be fixed to the fixing jig 20b, and the leaf spring 40a may be pulled up together with the fixing jig 20b for removal.

[0044] Furthermore, the wall construction method of the present invention has been explained using an example of constructing a dike 1 for an LNG tank 100, but the construction method of the present invention can also be applied when constructing other walls, and interference with construction work, etc. being carried out on one side of the wall can be avoided. "Construction work, etc." includes not only construction work other than facility construction for the LNG tank 100, such as excavation work, but also various other activities (such as various everyday activities) that utilize the space other than construction work.

[0045] Next, another example of the wall construction method of the present invention will be described as a second embodiment. The second embodiment will mainly describe the configurations that are different from the first embodiment, and similar configurations may be given the same reference numerals in the drawings and the like, and the description thereof may be omitted. Furthermore, the configurations described in the second embodiment can be applied to the first embodiment as needed.

[0046] [Second embodiment] 8A and 8B are diagrams illustrating a method for constructing a flood barrier 1 according to a second embodiment of the present invention. In this embodiment, as shown in Fig. 8A, the upper part of the fixing jig 200 is attached to the mounting part 130 of the block body 11 using the mounting fixture 60, and then the upper block 10 is lowered and placed on top of the lower block 10 as shown in Fig. 8B.

[0047] The mounting portion 130 is a box-shaped member embedded in the inner surface (one side) of the block body 11, and a front surface 131 is exposed on the inner surface of the block body 11.

[0048] The fixing jig 200 clamps and fixes the plate 12 of the lower block 10 between the vertical surface 216 of the jig body 210 on the block body 11 side and the block body 11.

[0049] Fig. 9 is a diagram showing the fixing jig 200, the mounting portion 130, and the fixture 60. Fig. 9(a) is a perspective view showing the fixing jig 200, the mounting portion 130, and the fixture 60, and Fig. 9(b) shows these components in an exploded view.

[0050] 9, a vertical elongated hole 134 is provided in the front surface 131 of the mounting part 130. A pair of elongated holes 134 are provided in the width direction of the mounting part 130. The width direction of the mounting part 130 corresponds to the extension direction of the dike 1 in its plane.

[0051] On the other hand, the fixing jig 200 has a vertical plate 220 and the like in addition to the jig body 210 described above.

[0052] The jig body 210 is a plate-like member arranged so that its plate surface is perpendicular to the block body 11 in a plan view, with the plate surface in the vertical direction. An inclined surface 217 is provided below the vertical surface 216 of the jig body 210, which inclines so as to move away from the block body 11 as it goes downward. Even if the plate 12 is slightly warped inward, the inclined surface 217 can guide the upper end of the plate 12 between the vertical surface 216 and the block body 11.

[0053] The vertical plate 220 is a plate-like member provided on the upper part of the vertical surface 216 of the jig body 210, and is arranged along the front surface 131 of the mounting part 130. The vertical plate 220 has a hole 221 at a position corresponding to the upper end of the long hole 134 of the front surface 131.

[0054] The mounting fixture 60 has arms 62 attached to both ends of a shaft 61. The shaft 61 is passed through the elongated hole 134 of the mounting part 130 and the hole 221 of the vertical plate 220, and the arms 62 at both ends of the shaft 61 extend in a direction perpendicular to the shaft 61. In this embodiment, the arms 62 at both ends of the shaft 61 extend in opposite directions to each other, making the mounting fixture 60 a crank-shaped member, but the extending direction of the arms 62 is not limited to this and can be determined depending on the extending direction of the elongated hole 134, etc.

[0055] When the upper block 10 is lowered and placed on the lower block 10, the arm 62 is in a horizontal position as shown in the left diagram of Figure 9(a), the arm 62 on the mounting part 130 side is engaged with the front surface 131 of the mounting part 130, and the vertical plate 220 of the fixing jig 200 is engaged with the arm 62 on the vertical plate 220 side, thereby fixing the fixing jig 200 to the mounting part 130.

[0056] In this state, filler material is filled between the upper and lower blocks 10 to form joints 2, and then arm 62 on the vertical plate 220 side is pulled up from above the constructed dike 1 (above the upper block 10) using an operating wire 63. This causes arm 62 to rotate in the vertical plane as shown in the right diagram of Figure 9(a), and the extension direction of arm 62 on the mounting part 130 side becomes a vertical position corresponding to elongated hole 134. Wire 63 is attached by passing it through hole 621 at the tip of arm 62 on the vertical plate 220 side.

[0057] This allows the arm 62 on the mounting part 130 side to pass through the long hole 134 on the front surface 131 of the mounting part 130, so that by manipulating the wire 63, the arm 62 can be pulled out of the long hole 134 as shown by arrow c in Figure 8(c), and the fixing jig 200 can be removed together with the mounting fixture 60 from the mounting part 130. Thereafter, the mounting fixture 60 and the fixing jig 200 can be pulled up from above the constructed flood barrier 1 by the wire 63, and then removed and recovered.

[0058] The present embodiment described above also provides the same effects as those of the first embodiment. Furthermore, the fixing jig 200 can be securely attached to the attachment portion 130 by the attachment fixture 60, and the attachment fixture 60 can also be removed by pulling it up from above the constructed flood barrier 1.

[0059] Furthermore, since the fixing jig 200, the mounting portion 130, and the mounting fixture 60 have the above-described configuration, the fixing jig 200 can be easily and securely attached to the mounting portion 130, and the fixing jig 200 and the mounting fixture 60 can also be easily removed.

[0060] However, the configurations of the fixing jig 200, the mounting portion 130, and the fixture 60 are not limited to those of the above embodiment. For example, the bottom surface of the mounting portion 130 may be inclined similarly to that of the first embodiment, making it easier to remove the fixture 60. Also, as shown in fixing jig 200a in Figure 10(a), the vertical plate 220 may be extended downward, and its surface on the block main body 11 side may be configured as a vertical surface 216 and an inclined surface 217.

[0061] As shown in FIG. 10(b), the fixing jig 200b may be attached to the mounting portion 130a by inserting the protrusion 230 provided on the vertical plate 220 of the fixing jig 200b into the internal space of the mounting portion 130a through an opening 135 provided on the front surface 131 of the mounting portion 130a, and arranging it so as to overlap with the bracket 136 provided in the internal space, and passing the pin 60a, which is an attachment, through the holes in the protrusion 230 and the bracket 136.

[0062] The pin 60a is an accessory of the fixing jig 200b, connected to the fixing jig 200b by a connecting member 64. By using an operating wire 65 separately attached to the pin 60a to pull the pin 60a from above the constructed dike 1, the pin 60a can be removed from the extension 230 and bracket 136, and the fixing jig 200b can be removed from the mounting part 130a. In the figure, reference numeral 70 denotes a wire for removing the fixing jig 200b. After removing the fixing jig 200b from the mounting part 130a, the fixing jig 200b can be pulled up together with the pin 60a by a wire 70 from above the constructed dike 1 and removed. The wire 70 is attached by passing through a hole 218 provided in the jig body 210 of the fixing jig 200b.

[0063] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that those skilled in the art can conceive of various modifications or alterations within the scope of the technical ideas disclosed herein, and it is understood that these modifications also fall within the technical scope of the present invention. [Explanation of symbols]

[0064] 1: Liquid dike 2: Joint 10: Precast blocks 11: Block body 12: Plate 13, 130, 130a: Mounting part 20, 20a, 20b, 200, 200a, 200b: Fixture 21, 210: Jig body 22: Locking part 23, 23a, 23b: Protrusion 40: Wedge (pressing tool) 40a: Leaf spring (pressing tool) 60: Mounting fixture 60a: Pin (mounting fixture) 61: Shaft 62: Arm 100: LNG tank 131: Front 132, 135: Aperture 134: Long hole 136: Bracket 211:Horizontal part 212: Vertical section 220: Vertical plate 230: Overhang

Claims

1. A method for constructing a wall, comprising stacking precast blocks each having a concrete block body and a plate attached to one side of the block body and protruding upward from the block body, and using the plate as a formwork to fill in the spaces between the upper and lower precast blocks to form joints, thereby constructing a wall from bottom to top, The upper precast block is hung down with the upper part of the fixing jig attached to the mounting part embedded on one side of the block body and placed on the lower precast block; When the filler is filled, the plate is fixed by the fixing jig; A wall construction method characterized in that, after the joints are formed, the fixing jig is pulled up and removed from above the constructed wall.

2. When the plate is fixed by the fixing jig, the fixing jig is pressed against the plate using a pressing tool; 2. The method for constructing a wall according to claim 1, wherein after the joints are formed, the pressing tool is pulled up and removed from above the constructed wall.

3. the mounting portion is a box-shaped member having a convex opening on a front surface located on the one side of the block body, The fixing jig is a jig body having an inverted L-shape and including a horizontal portion disposed above the opening and a vertical portion for fixing the plate; a locking portion provided at a tip of the horizontal portion so as to be perpendicular to the horizontal portion in a plan view, the locking portion being disposed in an internal space of the mounting portion and locking to the front surface; a protrusion protruding upward from the jig body; and The method for constructing a wall according to claim 2, wherein the pressing tool is disposed between the protrusion and the block body.

4. the pressing tool is a wedge, 4. The method for constructing a wall according to claim 3, wherein the protrusions are inclined so as to move away from the block body as they extend upward.

5. 4. The method for constructing a wall according to claim 3, wherein the pressing tool is an elastic body, and presses the fixing jig against the plate by its restoring force.

6. the fixing jig is attached to the attachment portion using an attachment tool, 2. The method for constructing a wall according to claim 1, wherein after the joints are formed, the fixtures are pulled up and removed from above the constructed wall.

7. the mounting portion is a box-shaped member having a long hole on a front surface located on the one side of the block body, the fixture has a vertical plate at an upper portion thereof that is disposed along the front surface; the mounting fixture is a member having arms provided at both ends of a shaft portion that is passed through the long hole and the hole of the vertical plate, the arms extending in a direction perpendicular to the shaft portion; The arm on the mounting portion side is engaged with the front surface, and the vertical plate is engaged with the arm on the vertical plate side, thereby attaching the fixing jig to the mounting portion, A wall construction method as described in claim 6, characterized in that when removing the mounting fixture, the arm on the vertical plate side is pulled up from above the constructed wall, the arms at both ends of the shaft are rotated in a vertical plane, and the extension direction of the arm on the mounting part side is aligned with the long hole so that the arm is removed from the long hole.

8. The mounting portion is a bracket provided in an internal space of a box-shaped member, and has an opening on a front surface located on the one side of the block body, the fixing jig has a protruding portion that is inserted into the internal space through the opening and is arranged to overlap the bracket; the attachment is a pin that passes through the protrusion and the bracket; 7. The wall construction method according to claim 6, wherein when removing the mounting fixture, the pin is pulled from above the constructed wall to remove the pin from the protruding portion and the bracket.

Images