JP2020176441A - Form structure - Google Patents

Abstract

To provide a form structure or the like capable of adequately filling a filler.SOLUTION: A form structure 10 is used upon filling a filler 6 in a gap between upper and lower blocks 1. In the form structure 10, a plate member 31 of a form 3 is placed outside the gap, and a plurality of spacers 34 are arranged between an upper part of the plate member 31 and the upper block 1 and spaced from each other in an extending direction of the gap. Thereby, a space B is formed between the upper part of the plate member 31 and the upper block 1, and the space B is in communication with the gap between the upper and lower blocks 1.SELECTED DRAWING: Figure 6

Description

The present invention relates to a formwork structure.

As a structure such as a pillar or a wall, there is a structure in which precast blocks, which are precast members made of concrete, are arranged at intervals above and below, and a filler is filled in the gaps to form joints.

When filling the filler, it is necessary to prevent the filler from leaking out of the gap. As shown in FIG. 13A, a blocking material M such as rubber may be arranged in the gap between the upper and lower precast blocks 1 to prevent leakage of the filler 6, but the blocking material M may cause a cross-sectional defect. For this reason, as shown in FIG. 13B, a temporary mold F is often installed outside the gap to fill the gap with the filler 6 (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2006-200197

A hose H that communicates with the gaps between the upper and lower precast blocks 1 is attached to the mold F, and functions as an escape route that allows air in the gaps to escape to the atmosphere when the filler 6 is filled. However, the small-diameter hose H has an insufficient air escape route, and a gap may remain between the precast blocks 1 after the filler 6 is filled. It is conceivable to attach a large number of hoses H to the mold F in order to secure an escape route for air, but in this case, the mold F needs to be considerably modified, and the cost increases.

Further, the volume of the filler 6 in the gap between the upper and lower precast blocks 1 is such that the moisture of the filler 6 is absorbed by the concrete of the precast block 1, and the air (bubbles) in the filler 6 is in the atmosphere via the hose H. It decreases due to reasons such as being opened to the air. The filler 6 that has flowed into the hose H when the filler 6 is filled also functions as a buffer for replenishing this volume reduction, but the volume (buffer capacity) of the filler 6 that can be replenished with the small diameter hose H is sufficient. There was also the problem that it was not.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a formwork structure or the like capable of suitably filling a filler.

The first invention for solving the above-mentioned problems is a formwork structure for filling a gap between upper and lower precast members with a filler, in which a plate material of the formwork is arranged outside the gap, and the plate material is provided. A plurality of first spacers are provided between the upper portion and the upper precast member at intervals in the extending direction of the gap, and the space between the upper portion of the plate material and the upper precast member is the gap. It is a formwork structure characterized by communicating with.

In the formwork structure of the present invention, a space is formed between the upper part of the plate material of the formwork and the upper precast member by the spacer, and this space is used instead of the hose described above, so that a sufficient air escape route can be obtained. Therefore, no voids remain between the precast members after filling the filler. Further, the filler in the space functions as a buffer for replenishing the volume reduction of the filler in the gap between the upper and lower precast members, and has an advantage that a sufficient buffer capacity can be obtained.

It is desirable that the upper portion of the plate material is fixed to the precast member in the upper stage by bolts, and the bolts are passed through the first spacer.
The plate material is fixed by bolts, for example, but by passing this bolt through the spacer for the upper part of the plate material, the filler in the space mentioned above does not adhere to the bolt, and the bolt can be easily removed when the formwork is removed. Can be done.

It is desirable that at least both side surfaces of the first spacer be tapered surfaces having a hem spread on the plate material side.
As a result, the filler adheres to the spacer (first spacer) is easily peeled off, and the mold can be easily removed.

It is desirable that a second spacer extending in the extending direction of the gap is provided between the lower portion of the plate material and the lower precast member.
By providing a spacer between the lower part of the plate material and the lower precast member, the formwork can be suitably installed even when the plate material has rigidity.

It is desirable that the upper end of the second spacer is located above the upper surface of the lower precast member.
This facilitates the work of removing the filler remaining on the outside of the precast member after the formwork is removed.

It is desirable that the upper surface of the second spacer is a tapered surface that widens the hem on the plate material side.
As a result, the filler adheres to the spacer (second spacer) is easily peeled off, and the mold can be easily removed.

The second invention is a formwork structure for filling a filling material in a gap between upper and lower precast members, in which a plate material of the formwork is arranged outside the gap, and the plate material has flexibility. The formwork structure is characterized in that the upper end is supported by the frame material in a state of being warped outward, and the space between the upper portion of the plate material and the precast member in the upper stage communicates with the gap.
Also in the formwork structure of the second invention, a space is formed between the upper part of the plate material of the formwork and the upper precast member, and this space communicates with the gap between the upper and lower precast members, so that the first embodiment The same effect as is obtained.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a formwork structure or the like capable of suitably filling a filler.

The figure which shows the liquid barrier 2 of the LNG tank 100. The figure which shows the precast block 1. The figure explaining the connection of the upper and lower blocks 1. The figure which shows the formwork structure 10. The figure which shows the plate material 31 and the frame material 32 of formwork 3. The figure explaining the filling of the filler 6. The figure which shows the state after removing the formwork. The figure which shows the insertion material 60 and the buffer tank 70. The figure which shows the formwork 3'. The figure which shows the formwork structure 10a. The figure which shows the formwork structure 10a'. The figure which shows the formwork structure 10b. The figure which shows the dammed material M and formwork F.

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

[First Embodiment]
(1. LNG tank 100)
FIG. 1 is a diagram showing a liquid barrier 2 of an LNG (liquefied natural gas) tank 100 constructed by using the formwork structure according to the embodiment of the present invention.

The LNG tank 100 is a above-ground tank for storing LNG, and is provided with a tubular liquid barrier 2 on a bottom slab 5 supported by piles (not shown) in the ground. An inner tank (not shown) made of a metal plate or the like is arranged inside the liquid barrier 2, and an outer tank roof 4 is installed at the top of the liquid barrier 2. LNG is stored in the inner tank.

The liquid barrier 2 is a wall body provided to prevent liquid leakage from the LNG to the outside even when the inner tank or the like is damaged. In the present embodiment, the precast blocks 1 (hereinafter, may be referred to as blocks) are arranged in the circumferential direction of the liquid barrier 2 and laminated in the vertical direction, and the filler 6 is filled between the vertically adjacent blocks 1. Filler 7 is filled between the blocks 1 adjacent to each other on the left and right to serve as joints. As a result, the liquid barrier 2 is constructed by connecting the upper, lower, left and right blocks 1. In addition, in the liquid barrier 2, prestress by a tension material (not shown) in the vertical direction and the circumferential direction passed through each block 1 is introduced.

(2. Precast block 1)
FIG. 2 is a diagram showing a precast block 1. The precast block 1 is a precast member provided with a joint 12 with a fixing body formed of a reinforcing bar protruding downward from the main body 11 and a fixing body provided at the tip of the reinforcing bar on the lower surface of the main body 11 which is a rectangular plate-shaped concrete member. is there.

The main body 11 has an arcuate warp according to the diameter of the liquid barrier 2, and a hole 110 is provided on the upper surface thereof. Further, mechanical joints 13 are provided on the left and right side surfaces of the main body 11. Although not shown, a sheath tube or the like for passing a tensioning material is also embedded inside the block 1.

(3. Connection method of block 1)
In the present embodiment, as shown in FIG. 3A, a new block 1 is lowered from above the lower block 1, and the block 1 is placed on the lower block 1 with a gap. At this time, the joint 12 with a fixing body of the upper block 1 is inserted into the hole 110 of the main body 11 of the lower block 1.

Next, as shown in FIG. 3B, a gap between vertically adjacent blocks 1 is surrounded by a temporary mold 3 to form a mold structure 10, and then a solidifying material such as mortar is used in this gap. Fill the filler 6.

When the filler 6 is solidified, joints are formed by the filler 6 in the gaps between the upper and lower blocks 1 as shown in FIG. 3C, and the upper and lower blocks 1 are connected with the joints in between. The mold 3 is removed after the filler 6 is solidified.

A joint is formed between the left and right blocks 1 in the same manner as the filler 6 or by filling the filler 7 with concrete, whereby the upper, lower, left and right blocks 1 can be connected to construct the liquid barrier 2.

(4. Formwork structure 10)
4A and 4B are views showing the formwork structure 10 before filling the filler 6, FIG. 4A is a view of the formwork structure 10 viewed from the outside, and FIG. 4B is a view showing the formwork structure 10 above. 4 (c) is a view showing a cross section in the vertical direction along the line AA of FIG. 4 (b).

In the formwork structure 10 of the present embodiment, the formwork 3 has a plate member 31 and a frame member 32, and the plate member 31 is fixed to the upper and lower blocks 1 via spacers 34 and 35.

The plate material 31 is arranged outside the gap so as to straddle the gap between the upper and lower blocks 1 vertically, and the stretching direction of the gap (the left-right direction of FIGS. 4A and 4B, the paper surface of FIG. 4C). It is provided in a strip shape along the (corresponding to the normal direction). The frame member 32 is a long member arranged on the outer surface of the plate member 31, and is provided above and below the plate member 31 along the stretching direction. Details of the plate member 31 and the frame member 32 will be described later.

Spacers 34 (34a, 34b) are provided between the upper part of the plate member 31 and the upper block 1, and a spacer 35 is provided between the lower part of the plate member 31 and the lower block 1. Wood, rubber, or the like can be used for the spacers 34 and 35, but the material thereof is not particularly limited.

A plurality of spacers 34 (first spacers) are arranged at intervals in the extending direction of the gaps between the upper and lower blocks 1. As a result, a space B is formed between the upper part of the plate member 31 and the upper block 1, and this space B communicates with the gap between the upper and lower blocks 1.

The spacer 35 (second spacer) is a long material arranged so as to extend in the stretching direction. The upper end of the spacer 35 is located above the upper surface of the lower block 1.

FIG. 5 is a perspective view showing the plate member 31 and the frame member 32 of the formwork 3.

The plate material 31 has flexibility and elasticity, and for example, a rubber plate is used. However, the plate material 31 is not limited to this.

The plate member 31 has a strip-shaped portion 311 along the extending direction of the gap between the upper and lower blocks 1 and bent portions 312 at both ends of the strip-shaped portion 311 in the longitudinal direction. The bent portion 312 is a portion in which both ends thereof are bent outward in a substantially L shape.

The strip-shaped portion 311 is provided with a plurality of holes 313 at intervals in the longitudinal direction. In this embodiment, holes 313 are provided in two upper and lower stages. Similar holes 313 are also provided in the bent portion 312 in two upper and lower stages.

The frame material 32 is formed of a metal such as aluminum, and has a structure in which a vertical plate 321 and a horizontal plate 322, which are substantially rectangular plate materials, are combined, and the cross section in the direction orthogonal to the longitudinal direction is substantially L-shaped.

In the frame material 32, a plurality of plate-shaped ribs 324 connecting the vertical plate 321 and the horizontal plate 322 are provided at intervals in the longitudinal direction. The ribs 324 are provided so as to be orthogonal to the vertical plate 321 and the horizontal plate 322, and some ribs 324 are arranged at both ends in the longitudinal direction of the frame member 32.

The vertical plate 321 is provided with a plurality of holes 323 at intervals in the longitudinal direction. The holes 323 are also provided in the ribs 324 at both ends of the frame member 32 in the longitudinal direction.

The formwork 3 has a pair of upper and lower frame members 32. These skeleton members 32 are arranged vertically on the outer surface of the plate member 31 with the horizontal plates 322 back to back. The ribs 324 at both ends of the frame member 32 in the longitudinal direction are arranged along the bent portion 312 of the plate member 31.

At this time, the upper and lower holes 313 of the strip-shaped portion 311 of the plate member 31 and the holes 323 of the vertical plate 321 of the upper and lower frame members 32 are aligned, and the shaft portion of the bolt 40 shown in FIG. 4 is passed through these holes 313 and 323. , The tip of the shaft portion is screwed into an insert (not shown) embedded in the upper and lower blocks 1. As a result, the upper part of the upper frame material 32 and the plate material 31 is fixed to the upper block 1, and the lower part of the lower frame material 32 and the plate material 31 is fixed to the lower block 1.

The shaft portion of the upper bolt 40 penetrates a part of the spacer 34b of the upper spacer 34. The spacer 34b is made of a member that is vertically longer than the other spacers 34a so that the lower end of the spacer 34b reaches the height of the bolt 40, and the lower end of the spacer 34b is located lower than the lower end of the spacer 34a. However, the members of the spacers 34a and 34b may be shared and the positions of the lower ends of the spacers 34a and 34b may be aligned. On the other hand, the shaft portion of the lower bolt 40 penetrates the lower spacer 35.

In the present embodiment, a plurality of formwork 3s are arranged side by side along the extending direction of the gap between the upper and lower blocks 1, and each formwork 3 is attached to the upper and lower blocks 1 as described above.

As shown in FIG. 4A, the adjacent molds 3 are arranged so that the bent portions 312 of the plate members 31 of the respective molds 3 are in contact with each other back to back. Further, ribs 324 at the longitudinal end of the frame member 32 of each formwork 3 are arranged so as to sandwich the bent portions 312.

In both formwork 3, the positions of the bent portions 312 and the holes 313 and 323 of the ribs 324 are aligned, the shaft portion of the bolt 50 is passed through the holes 313 and 323, and the nut 51 is tightened to the tip of the shaft portion. It is connected by fastening the ribs 324 of the above.

By tightening the nut 51, the bent portion 312 is pressed from both sides and compressed. By adjusting the amount of compression of the bent portion 312 at this time, it is possible to fit the mold 3 according to the length of the outer surface of the block 1 on the plane.

(5. Filling of filler 6)
In the present embodiment, the filler 6 is filled in the gap between the upper and lower blocks 1 inside the mold 3. 6A and 6B are views for explaining filling of the filler 6, and FIGS. 6A and 6B show the states of the filler 6 during and after filling in the same cross section as in FIG. 4C. Is. Further, FIG. 6C is a perspective view showing a state after filling of the filler 6. In FIG. 6C, the shapes of the spacers 34 and 35 hidden in the plate member 31 and the frame member 32 are shown by chain lines.

In the present embodiment, the filler 6 is filled in the gaps between the upper and lower blocks 1 from between the adjacent blocks 1 on the left and right. At this time, the space B between the upper part of the plate member 31 formed by the spacer 34 and the upper block 1 functions as an escape route for air when the filler 6 is filled.

The lower surface of the upper block 1 is inclined so as to be obliquely upward toward the outside, and during filling of the filler 6, air is introduced along this inclination as shown by the arrow a in FIG. 6 (a). It moves and escapes from the above space B into the atmosphere. In this way, the filler 6 is filled as shown in FIG. 6 (b). The filling confirmation of the filler 6 can be performed by visually observing the level of the upper surface of the filler 6 in the space B.

Until the filler 6 solidifies, the volume of the filler 6 in the gap between the upper and lower blocks 1 is such that the air (bubbles) in the filler 6 is a space in which the moisture of the filler 6 is absorbed by the concrete of the block 1. It decreases due to reasons such as being released to the atmosphere via B. The filler 6 in the space B functions as a buffer for replenishing the volume reduction.

The mold 3 is removed after the filler 6 is solidified. Here, after removing the bolt 40, the plate member 31, the frame member 32, and the spacers 34 and 35 are removed. Since the bolts 40 are all passed through the spacers 34b and 35, the filler 6 in the space B does not adhere to the bolts 40 and become difficult to remove.

FIG. 7 is a diagram showing a state after the mold 3 is removed. The filler 6 remaining on the outside of the block 1 is removed by a chipping operation or the like to smooth the outer surface. If a curing tape is attached to the lower end of the outer surface of the upper block 1 before filling the filler 6, the filler 6 can be removed cleanly. As described above, the upper end of the spacer 35 protrudes above the upper surface of the lower block 1, and in the height range P corresponding to the protruding portion, the filler 6 does not remain on the outside of the block 1 and is the same as the lower block 1. Since the smooth surface can be obtained, the work of removing the filler 6 becomes easy.

As described above, in the formwork structure 10 of the present embodiment, a space B is formed between the upper portion of the plate member 31 of the formwork 3 and the upper block 1 by the spacer 34, and this space B is used as the hose H. Since it is used instead of the above, a sufficient escape route for air can be obtained, and no voids remain between the blocks 1 after the filler 6 is filled. Further, the filler 6 in the space B functions as a buffer for replenishing the volume reduction of the filler 6 in the gap between the upper and lower blocks 1, and a sufficient buffer capacity can be obtained.

Further, in the present embodiment, the plate material 31 of the form 3 is fixed by the bolts 40, but for the upper part of the plate material 31, the filler 6 in the space B becomes the bolts 40 by passing the bolts 40 through the spacer 34b. The bolt 40 can be easily removed when the mold is removed without adhering. Since the space between the spacers 34b is wide, the spacer 34a is additionally provided between the spacers 34b, and unlike the spacer 34b, the bolt 40 is not passed through. The spacer 34a can be omitted.

Further, a spacer 35 is arranged between the lower portion of the plate member 31 and the lower block 1, and the upper end of the spacer 35 is positioned above the upper surface of the lower block 1 to form a mold as described above. The work of removing the filler 6 remaining on the outside of the block 1 after the frame is removed becomes easy.

Further, in the present embodiment, since the plate material 31 has flexibility, even if there is a positional deviation between the upper and lower blocks 1, the plate material 31 attached to each block 1 by the pair of frame materials 32 is the frame material 32. It deforms between them and follows the misalignment. Therefore, even when there is a misalignment between the blocks 1, it functions suitably as a mold 3 and can prevent leakage of the filler 6.

However, the present invention is not limited to this. For example, in the present embodiment, the filler 6 remaining on the outside of the block 1 is removed by a lifting operation or the like, but a certain time has passed since the filler 6 was filled, and the filler 6 is at an appropriate time before solidification, for example, the filler 6. Immediately before the solidification of No. 6, as shown in FIG. 8A, by inserting the plate-shaped insertion material 60 up to the upper end of the spacer 35 along the outer surface of the block 1, the filler in the gap between the upper and lower blocks 1 is inserted. 6 and the filler 6 on the outside of the block 1 can be separated, and the filler 6 on the outside of the block 1 can be easily removed after the mold is removed.

Further, as shown in FIG. 8B, if the thicknesses of the spacers 34 and 35 are reduced and the space between the block 1 and the plate member 31 is narrowed, the filler 6 remaining on the outside of the block 1 after the mold is removed is reduced. The removal work becomes easier. However, in this case, since the volume of the space B becomes smaller and the buffer capacity of the filler 6 becomes smaller, a buffer tank 70 for allowing the filler 6 to flow through the mold 3 can be separately provided to secure the buffer capacity.

Further, as shown in the formwork 3'of FIG. 9, the lower portion of the plate member 31 can be directly fixed to the lower block 1 by the bolt 40, and the spacer 35 can be omitted. Since the plate material 31 has flexibility, such a configuration is also possible.

Further, in the present embodiment, the formwork 3 is arranged in the gap between the upper and lower blocks 1 having an arcuate warp, but the shape of the block 1 is also not limited, for example, for a flat rectangular block having no warp. The same formwork 3 can be applied to. Further, in the present embodiment, the tubular liquid barrier 2 of the LNG tank 100 is constructed by the block 1, but the formwork structure 10 of the present embodiment is also used when constructing a wall body other than the liquid barrier 2. Applicable, the wall does not have to be tubular. In addition, the formwork structure 10 of the present embodiment can also be applied when constructing a structure other than a wall body such as a pillar body.

Hereinafter, another example of the present invention will be described as a second and third embodiment. The second and third embodiments will be described with reference to differences from the first embodiment, and the same reference points will be omitted in the drawings and the like.

[Second Embodiment]
FIG. 10 shows the formwork structure 10a according to the second embodiment of the present invention in the same perspective view as in FIG. 6C. The formwork structure 10a of the second embodiment is mainly different from the first embodiment in that a rigid material such as wood or metal is used as the plate member 31a of the formwork 3a.

The plate member 31a is arranged in a strip shape along the extending direction of the gap outside the gap between the upper and lower blocks 1. Above and below the outer surface of the plate member 31a, a girder-shaped frame member 32a extending along the extending direction of the gap is arranged. A rigid material such as wood or metal is also used for the frame material 32a.

In the example of FIG. 10, the column members 80 in the vertical direction are bridged between the upper and lower frame members 32a at positions corresponding to both sides of the bolts 40, and the holding plates 90 are arranged so as to straddle both the column members 80. The plate member 31a is fixed to the block 1 by pressing the pressing plate 90 against the block 1 side by the head of the head.

The configurations of the spacers 34 and 35 are the same as those in the first embodiment. In this embodiment as well, a space is formed between the upper part of the plate member 31a and the upper block 1, and this space communicates with the gap between the upper and lower blocks 1. As a result, the same effect as that of the first embodiment can be obtained. In the first embodiment using the flexible plate material 31, the spacer 35 can be omitted as described above, but in the present embodiment, since the plate material 31a has rigidity, spacers 34 and 35 are provided above and below. The mold 3a can be preferably installed in the above.

The shapes and sizes of the spacers 34 and 35 are not particularly limited as long as the above space can be formed. For example, the formwork structure 10a'in FIG. 11 is an example in which the spacers 34'(34a', 34b') and the formwork 3a'with different shapes and sizes of 35' are used, and FIG. 11A shows FIG. A similar perspective view, FIG. 11B, is a view of the surface of the plate member 31a on the block 1 side.

In this example, both side surfaces and the lower surface of the spacer 34a', and the spacer 34b' so that the lower end of the spacer 34b'contacts the upper end of the spacer 35' and the mold 3a'after solidification of the filler 6 can be easily removed. Both side surfaces of the spacer 35'and the upper surface of the spacer 35'are tapered surfaces 341, 342, and 351 respectively. The tapered surfaces 341, 342, and 351 are formed so as to have a wide hem on the plate material 31a side, which makes it easy for the filler 6 to be peeled off. As described above, the spacer 34a'can be omitted.

[Third Embodiment]
FIG. 12 is a diagram showing a formwork structure 10b according to a third embodiment of the present invention in the same cross section as in FIG. 4 (c). The mold structure 10b of the present embodiment is mainly different from the first embodiment in that a space B is formed between the upper portion of the plate member 31 and the upper block 1 while omitting the spacers 34 and 35.

That is, in the present embodiment, the upper and lower frame members 32 of the formwork 3b are integrated by the connecting member 33, and the upper frame member 32 is inclined diagonally upward toward the outside, so that the upper and lower frame members 32 are flexible. The plate material 31 having the above is attached to support the plate material 31, and the upper end of the plate material 31 is in a state of being warped outward. Further, in the present embodiment, the lower portion of the plate member 31 is directly fixed to the lower block 1 by the bolt 40.

Also in the present embodiment, a space B is formed between the upper part of the plate member 31 and the upper block 1, and the space B communicates with the gaps between the upper and lower blocks 1 to obtain the same effect as that of the first embodiment. Be done. Further, in the present embodiment, the spacers 34 and 35 can be omitted by arranging the flexible plate members 31 in a warped manner as described above.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the technical idea disclosed in the present application, and these also naturally belong to the technical scope of the present invention. Understood.

1: Block 2: Liquid barrier 3, 3', 3a, 3a', 3b: Formwork 4: Outer tank roof 5: Bottom slab 6, 7: Filler 10, 10a, 10a', 10b: Formwork structure 31, 31a: Plate material 32, 32a: Frame material 33: Connecting material 34, 34', 34a, 34a', 34b, 34b', 35, 35': Spacer 40, 50: Bolt 60: Insert material 70: Buffer tank 80: Pillar material 90: Presser plate 100: LNG tank 341: Tapered surface 342: Tapered surface 351: Tapered surface

Claims (7)

It is a formwork structure when filling the gap between the upper and lower precast members with the filler.
The plate material of the formwork is arranged outside the gap,
A plurality of first spacers are provided between the upper portion of the plate material and the precast member in the upper stage at intervals in the extending direction of the gap.
A formwork structure characterized in that a space between an upper portion of the plate material and the upper precast member communicates with the gap. The upper part of the plate material is fixed to the upper precast member by bolts,
The formwork structure according to claim 1, wherein the bolt is passed through the first spacer. The mold structure according to claim 1 or 2, wherein at least both side surfaces of the first spacer are tapered surfaces having a wide hem on the plate material side. The mold structure according to any one of claims 1 to 3, wherein a second spacer extending in the extending direction of the gap is provided between the lower portion of the plate material and the lower precast member. .. The formwork structure according to claim 4, wherein the upper end of the second spacer is located above the upper surface of the precast member in the lower stage. The mold structure according to claim 4 or 5, wherein the upper surface of the second spacer is a tapered surface having a wide hem on the plate material side. It is a formwork structure when filling the gap between the upper and lower precast members with the filler.
The plate material of the formwork is arranged outside the gap,
The plate material has flexibility and is supported by a frame material with the upper end curved outward.
A formwork structure characterized in that a space between an upper portion of the plate material and the upper precast member communicates with the gap.

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