Formwork installation auxiliary device and concrete pouring method

Abstract

To provide a formwork installation auxiliary device and a method of placing concrete that suppress outflow of concrete from between a bottom edge of a formwork and a slope surface with a simple configuration when the formwork is installed on the slope surface and concrete is placed.SOLUTION: A formwork installation auxiliary device 10 is used when installing a formwork 50 on a slope surface 1 of an object (e.g. a floor slab 2). The formwork installation auxiliary device 10 comprises: a base member 20 having a base surface part 21 to be placed on the slope surface 1 and a wall surface part 22 rising from the base surface part 21; a height adjustment device 30 provided on the base surface part 21 to support the formwork 50 from below and configured to be able to adjust a height of a bottom end 51 of the formwork 50 relative to the slope surface 1. The wall surface part 22 laps the lower end 51 of the formwork 50 on the height adjustment device 30.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a formwork installation auxiliary device used when installing a formwork on a sloped surface of an object, and a method for pouring concrete using a formwork installed using this formwork installation auxiliary device. [Background technology]

[0002] Patent Document 1 discloses a height-adjusting member for formwork. In Patent Document 1, first, multiple height-adjusting members are fixed on battens fixed to the concrete floor surface. Then, battens are fixed perpendicularly to the formwork, and the battens and formwork are placed on the height-adjusting members. After this, concrete is poured into the area surrounded by the formwork. Paragraphs 0027 and 0032 of Patent Document 1 state that although a small amount of cement paste (in other words, a small amount of concrete) spills out from the gap between the bottom end of the formwork (battens) and the battens, it is not enough to cause a problem. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-219934 Summary of the Invention [Problem to be solved by the invention]

[0004] However, if the technology disclosed in Patent Document 1 is applied to installing a rectangular plate-shaped formwork on a steeply sloping concrete floor while keeping its bottom end horizontal, a large gap will be formed between the bottom end (crosspiece) of the formwork and the batten, which could allow a large amount of concrete to leak out. For this reason, it has been difficult to use the technology disclosed in Patent Document 1 when installing a formwork on a sloped surface.

[0005] In view of the above situation, the present invention aims to suppress the outflow of concrete from between the lower end of the formwork and the inclined surface with a simple configuration when the formwork is installed on the inclined surface and concrete is poured. [Means for solving the problem]

[0006] Therefore, the formwork installation auxiliary device of the present invention is used when installing a formwork on a sloped surface of an object. The formwork installation auxiliary device of the present invention comprises a base member having a base portion to be placed on the sloped surface and a wall portion rising from the base portion, and a height adjustment device provided on the base portion to support the formwork from below and configured to adjust the height of the lower end of the formwork relative to the sloped surface. Here, the wall portion overlaps with the lower end of the formwork on the height adjustment device. A through hole is formed in the base surface portion, and a lower portion of the height adjustment device is inserted into the through hole, and the base surface portion is fixed to the inclined surface by the lower portion of the height adjustment device. The height adjustment device includes a first member constituting the lower portion and a second member attached to the first member, the first member being tubular with a bottom and an open top surface, and having a flange portion on the edge of the opening on the top surface, the second member having a male thread portion that screws into a female thread portion formed on the inner peripheral surface of the first member and a plate-shaped seat portion connected to the upper end of the male thread portion, and the lower end of the formwork is placed on the seat portion.

[0007] The concrete pouring method of the present invention is a method of pouring concrete using a form installed using the aforementioned form installation auxiliary device. The concrete pouring method of the present invention includes laying a base member on a sloped surface, providing a height adjustment device on the base surface of the base member, installing the formwork so that the wall surface of the base member abuts against the lower end of a first surface of the formwork on the height adjustment device, and pouring concrete onto the first surface of the formwork. [Effects of the Invention]

[0008] According to the present invention, the wall surface of the base member on the inclined surface overlaps (laps) the bottom end of the formwork, thereby closing the gap between the bottom end of the formwork and the inclined surface with the wall surface of the base member, making it possible to suppress concrete from flowing out of the gap with a simple structure. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing a form installed on a sloped surface via a form installation auxiliary device according to a first embodiment of the present invention. [Figure 2] Partial cross section of Figure 1 taken along the line AA [Figure 3] Enlarged view of part B in Figure 2 [Figure 4] FIG. 1 is a diagram showing a configuration of a height adjustment device in the first embodiment. [Figure 5] FIG. 10 is a diagram showing a method for constructing a wall in the first embodiment. [Figure 6] FIG. 10 is a diagram showing a method for constructing a wall in the first embodiment. [Figure 7] FIG. 10 is a diagram showing a method for installing a formwork in a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. Fig. 1 is a diagram showing a formwork 50 installed on a sloped surface 1 via a formwork installation auxiliary device 10 in a first embodiment of the present invention. Fig. 2 is a partial cross-sectional view taken along the line AA in Fig. 1. Fig. 3 is a partial enlarged view of portion B in Fig. 2, and also shows a schematic configuration of the formwork installation auxiliary device 10 in this embodiment.

[0011] In this embodiment, the inclined surface 1 is the upper surface of a deck slab 2, which is a concrete structure made of, for example, precast concrete or cast-in-place concrete, and is inclined at a predetermined gradient. The maximum gradient of the inclined surface 1 assumed in this embodiment is approximately 10% to 15%. In this regard, the inclined surface 1 shown in FIG. 1 shows an example in which the gradient is approximately 8% (i.e., the inclined surface 1 shown in FIG. 1 shows an example in which the gradient is approximately 4.6° with respect to the horizontal plane). Here, in this embodiment, the deck slab 2 corresponds to the "object" of the present invention.

[0012] In this embodiment, in order to construct a new concrete wall 3 (see FIG. 6 described later) on the sloped surface 1 of the existing deck 2, a formwork 50 is erected on the sloped surface 1 using a formwork installation auxiliary device 10, and a wall construction area W is defined by the formwork 50, and concrete is then poured into this area W. Here, the wall construction area W and the wall 3 extend along the gradient (inclination) of the sloped surface 1.

[0013] The formwork 50 is a rectangular plate and is made of, for example, metal, resin, or wood. In this embodiment, the formwork 50 is a unit formed by assembling multiple small metal frames (not shown). The formwork 50 is, for example, a square plate (rectangular plate) measuring 3 m long x 3 m wide, and can be formed by arranging 10 small rectangular plate frames measuring 300 mm long x 750 mm wide vertically and 4 frames horizontally to form a unit. However, the dimensions of the formwork 50 are not limited to 3 m long x 3 m wide.

[0014] In this embodiment, a plurality of formwork sheets 50 are arranged on both sides of the wall construction area W. The formwork sheets 50 are arranged in a staircase pattern along the gradient of the inclined surface 1 with their lower ends 51 horizontal.

[0015] The formwork installation auxiliary device 10 is used when installing a formwork 50 on a sloped surface 1. The formwork installation auxiliary device 10 comprises a base member 20 and a height adjustment device 30. The height adjustment device 30 supports the formwork 50 from below and is configured to be able to adjust the height of the lower end portion 51 of the formwork 50 relative to the sloped surface 1.

[0016] The base member 20 is made of, for example, metal, resin, or wood, and in this embodiment, the base member 20 is formed of angle iron (angle). The base member 20 extends along the gradient of the inclined surface 1. The base member 20 has a base surface portion 21 that is placed on the inclined surface 1 and a wall surface portion (vertical surface portion) 22 that rises from the base surface portion 21. The base surface portion 21 is in surface contact with the inclined surface 1. The wall surface portion 22 is in surface contact with and overlaps (i.e., laps over) the lower end portion 51 of the formwork 50 on the height adjustment device 30. In this embodiment, the upper edge of the wall surface portion 22 can be positioned so that it is always located higher than the lower edge of the lower end portion 51 of the formwork 50 in the direction along the gradient of the inclined surface 1. As a result, an overlapping portion (lap portion) R extending along the gradient of the inclined surface 1 is continuously formed between the wall portion 22 and the lower end portion 51 of the formwork 50, and this overlapping portion R can suppress the formation of a gap between the wall portion 22 and the lower end portion 51 of the formwork 50.

[0017] The length of the base member 20 (the length in the direction along the gradient of the inclined surface 1) may be, for example, approximately the same as the length of the lower edge of the formwork 50. However, the length of the base member 20 is arbitrary.

[0018] The height of the wall portion 22 of the base member 20 can be appropriately set based on the gradient of the inclined surface 1 and the dimensions of the formwork 50 so that an overlap portion R is formed continuously between the wall portion 22 and the lower end portion 51 of the formwork 50 along the gradient of the inclined surface 1.

[0019] In this embodiment, a plurality of height adjustment devices 30 are provided on the base surface portion 21 of the base member 20 at intervals in a direction along the gradient of the inclined surface 1 (the tilt direction). The installation intervals of the height adjustment devices 30 in the direction along the gradient of the inclined surface 1 can be set appropriately so that a plurality of height adjustment devices 30 correspond to one formwork 50. In this regard, in this embodiment, the installation intervals are approximately half the length of the bottom edge of the formwork 50, and therefore two height adjustment devices 30 correspond to one formwork 50. In this embodiment, the height of the bottom end 51 of one formwork 50 is adjusted by the two height adjustment devices 30 so that the bottom end 51 of the formwork 50 is horizontal.

[0020] Here, the height adjusting device 30 will be described with reference to FIG. 4 in addition to the above-mentioned FIGS. Figure 4 shows the configuration of the height adjustment device 30. In detail, Figure 4(A) shows the height adjustment device 30 in an extended state, and Figure 4(B) shows the height adjustment device 30 in a retracted state.

[0021] The height adjustment device 30 is made of, for example, metal or resin, and includes a first member 31 that forms the lower part of the height adjustment device 30, and a second member 32 that forms the upper part of the height adjustment device 30 and is attached to the first member 31.

[0022] The first member 31 is cylindrical and has an open top and a closed bottom, and has an internal thread (not shown) formed on its inner circumferential surface. An annular flange 31a is formed on the edge of the opening on the top surface of the first member 31, projecting radially outward.

[0023] The second member 32 has a male threaded portion 32a that screws into the female threaded portion on the inner peripheral surface of the first member 31, and a disk-shaped seat portion 33 connected to the upper end of the male threaded portion 32a. The lower end portion 51 of the formwork 50 can be placed on the upper surface of the seat portion 33. In this embodiment, the outer diameter of the seat portion 33 is larger than the outer diameter of the flange portion 31a of the first member 31. However, the outer diameter of the seat portion 33 may be approximately the same as the outer diameter of the flange portion 31a of the first member 31, or the outer diameter of the seat portion 33 may be smaller than the outer diameter of the flange portion 31a of the first member 31. Note that the seat portion 33 and / or the flange portion 31a are not limited to a circular shape, and may be an elliptical shape, a rectangular shape, or other polygonal shape.

[0024] The height adjustment device 30 is shortened by screwing the male thread portion 32a of the second member 32 into the female thread portion of the first member 31. Conversely, the height adjustment device 30 is extended by loosening the male thread portion 32a of the second member 32 from the female thread portion of the first member 31. Therefore, the height adjustment device 30 is freely expandable and contractible in the vertical direction.

[0025] 2 and 3, in this embodiment, a through-hole 21a is formed in the base surface portion 21 of the base member 20 for inserting the first member 31 of the height adjustment device 30. In this embodiment, the base surface portion 21 of the base member 20 is fixed to the inclined surface 1 by the first member 31 of the height adjustment device 30.

[0026] Next, a method for constructing the wall body 3 in this embodiment will be described with reference to FIGS. 5 and 6 in addition to the above-mentioned FIGS. 5(a) to 6(f) show a method for constructing the wall body 3. This method for constructing the wall body 3 includes a method for pouring concrete using a formwork 50 installed using a formwork installation auxiliary device 10.

[0027] First, as shown in FIG. 5(A), a base member 20 is laid on the inclined surface 1 at a location adjacent to an area W where a wall is to be constructed. Next, as shown in FIG. 5(A), through holes 21a and holes 5 are formed in the base surface portion 21 and the inclined surface 1 of the base member 20 using a drilling device such as a hammer drill (vibration drill). A hole 5 is formed in the portion of the inclined surface 1 facing the through hole 21a of the base surface portion 21.

[0028] Next, as shown in FIG. 5(c), the first member 31 with the second member 32 attached thereto is inserted into the through-hole 21a and the hole 5, thereby providing the height adjustment device 30 on the base surface portion 21 of the base member 20. As a result, the base member 20 is fixed to the sloped surface 1 by being sandwiched between the flange portion 31a of the first member 31 and the sloped surface 1. In other words, the height adjustment device 30 (particularly the first member 31) can also serve as a fixing means for fixing the base member 20 to the sloped surface 1. Furthermore, by inserting the height adjustment device 30 (particularly the first portion 31) into the hole 5, most of the height adjustment device 30 (particularly the first portion 31) can be embedded in the deck slab 2, thereby expanding the range of height adjustment by the height adjustment device 30.

[0029] Next, as shown in FIG. 6(D), the formwork 50 is installed so that the wall surface portion 22 of the base member 20 abuts against the lower end portion 51a of the first surface 50a of the formwork 50 on the height adjustment device 30 (i.e., so as to form the overlapping portion R). At this time, the lower end portion 51 of the formwork 50 is placed on the seat portion 33 of the second member 32. This installation process of the formwork 50 includes adjusting the height of the lower end portion 51 of the formwork 50 using the height adjustment device 30 so that the lower end portion 51 of the formwork 50 is horizontal. This height adjustment is preferably performed by extending or retracting the height adjustment device 30 before placing the lower end portion 51 of the formwork 50 on the seat portion 33 of the second member 32. Alternatively, the height adjustment may be performed by extending or retracting the height adjustment device 30 after the lower end portion 51 of the formwork 50 is placed on the seat portion 33 of the second member 32.

[0030] In this way, multiple formwork 50 are arranged on each side of the planned wall construction area W so as to sandwich the area W, and then the formwork 50 facing each other across the planned wall construction area W are connected from the inside using separators (not shown). An example of where the separators are provided is shown by dashed lines in Figure 2. By connecting the formwork 50 with these separators, the formwork 50 is pulled toward the inside of the planned wall construction area W, increasing the degree of adhesion at the overlapping portions R.

[0031] Next, as shown in Fig. 6(e), concrete is poured into the wall construction area W defined by the first surfaces 50a of the multiple formwork sheets 50, thereby constructing the wall 3. If the wall 3 is made of reinforced concrete, reinforcement work may be carried out prior to pouring the concrete.

[0032] When construction of the wall 3 is completed (in other words, after the concrete poured in the planned wall construction area W has hardened and cured), the formwork 50 and formwork installation auxiliary device 10 are removed as shown in Figure 6 (f). Then, the hole 5 is filled with a filler such as mortar to seal it. In this manner, the wall 3 is constructed.

[0033] Here, increasing the thickness of the base member 20 increases the rigidity of the base member 20, thereby strengthening its function as a footing for the formwork 50. On the other hand, decreasing the thickness of the base member 20 reduces the step 3a (see FIG. 6(f)) formed at the bottom of the wall body 3. Based on these findings, the thickness of the base member 20 can be selected appropriately.

[0034] Furthermore, by increasing the length (height) of the first member 31 and the length (height) of the male threaded portion 32a of the second member 32, the range of height adjustment by the height adjustment device 30 can be expanded. Needless to say, this requires making the hole 5 deeper. Furthermore, by increasing the size (e.g., outer diameter) of the seat portion 33 of the second member 32, it becomes possible to accommodate a larger formwork 50.

[0035] According to this embodiment, the formwork installation auxiliary device 10 is used when installing a formwork 50 on a sloped surface 1 of an object (e.g., a deck 2). The formwork installation auxiliary device 10 includes a base member 20 having a base surface portion 21 placed on the sloped surface 1 and a wall surface portion 22 rising from the base surface portion 21, and a height adjustment device 30 provided on the base surface portion 21 to support the formwork 50 from below and configured to adjust the height of a lower end portion 51 of the formwork 50 relative to the sloped surface 1. The wall surface portion 22 overlaps the lower end portion 51 of the formwork 50 on the height adjustment device 30. Specifically, for example, in a side view as shown in FIG. 1 , the wall surface portion 22 overlaps the lower end portion 51 of the formwork 50 on the height adjustment device 30 when viewed horizontally. As a result, the gap between the lower end portion 51 of the formwork 50 and the sloped surface 1 is blocked by the wall surface portion 22 of the base member 20, thereby preventing concrete from flowing out of the gap.

[0036] Furthermore, according to this embodiment, a plurality of height adjustment devices 30 are provided for one formwork 50. This allows one formwork 50 to be supported from below at a plurality of locations, and the height of the lower end 51 of the formwork 50 relative to the inclined surface 1 to be adjusted.

[0037] Furthermore, according to this embodiment, it is preferable that the height of the lower end 51 of one formwork 50 is adjusted by the plurality of height adjustment devices 30 so that the lower end 51 of the formwork 50 is horizontal. Generally, the formwork 50 is lifted or lowered by a lifting device such as a crane with the lower end 51 of the formwork 50 held horizontal, and from this point of view, it is preferable that the formwork 50 is installed so that the lower end 51 of the formwork 50 is horizontal.

[0038] Furthermore, according to this embodiment, the height adjustment device 30 is extendable in the vertical direction, which allows the height of the lower end 51 of the formwork 50 to be adjusted with a simple configuration.

[0039] Furthermore, according to this embodiment, a through hole 21a is formed in the base surface portion 21, and a lower portion (e.g., first portion 31) of the height adjustment device 30 is inserted into the through hole 21a, and the base surface portion 21 is fixed to the inclined surface 1 by the lower portion (e.g., first portion 31) of the height adjustment device 30. This allows the height adjustment device 30 to also serve as a fixing means for fixing the base member 20 to the inclined surface 1.

[0040] Furthermore, according to this embodiment, a hole 5 is formed in a portion of the inclined surface 1 that faces the through-hole 21a of the base surface portion 21, and a lower portion (e.g., first portion 31) of the height adjustment device 30 is inserted into the hole 5. This allows most of the lower portion (e.g., first portion 31) of the height adjustment device 30 to be embedded in the deck slab 2, thereby expanding the range of height adjustment by the height adjustment device 30.

[0041] According to this embodiment, the height adjustment device 30 includes a first member 31 constituting its lower portion, and a second member 32 attached to the first member 31. The first member 31 is cylindrical with an open top and a bottom, and has a flange 31a on the edge of the opening on the top surface. The second member 32 has a male threaded portion 32a that screws into a female threaded portion formed on the inner peripheral surface of the first member 31, and a plate-shaped seat 33 connected to the upper end of the male threaded portion 32a. The lower end 51 of the formwork 50 is placed on the seat 33. This allows the configuration of the height adjustment device 30 to be simplified.

[0042] Furthermore, according to this embodiment, the base member 20 is formed of angle iron, which allows the base member 20 to be made of a general steel material.

[0043] According to this embodiment, the object having the inclined surface 1 is a concrete structure (for example, a deck 2). In this manner, it is preferable to use the formwork installation auxiliary device 10 when constructing a concrete wall 3 on the concrete structure having the inclined surface 1.

[0044] According to this embodiment, a method for pouring concrete using a formwork 50 installed using a formwork installation auxiliary device 10 includes laying a base member 20 on a sloped surface 1 (see FIG. 5(A)), providing a height adjustment device 30 on the base surface 21 of the base member 20 (see FIG. 5(C)), installing the formwork 50 so that the wall surface 22 of the base member 20 abuts the lower end 51a of the first surface 50a of the formwork 50 on the height adjustment device 30 (see FIG. 6(D)), and pouring concrete onto the first surface 50a of the formwork 50 (see FIG. 6(E)). Here, installing the formwork 50 (see FIG. 6(D)) preferably includes adjusting the height of the lower end 51 of the formwork 50 using the height adjustment device 30 so that the lower end 51 of the formwork 50 is horizontal. This height adjustment is preferably performed by extending or contracting the height adjustment device 30 before placing the lower end 51 of the formwork 50 on the height adjustment device 30, but it may also be performed by extending or contracting the height adjustment device 30 after placing the lower end 51 of the formwork 50 on the height adjustment device 30.

[0045] Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 7 shows a method for installing formwork 50, 50' in this embodiment. The differences from the first embodiment will be described below.

[0046] In this embodiment, of the formworks 50, 50' arranged to sandwich the planned wall construction area W on both sides, the formwork 50 on one side is equipped with a formwork installation auxiliary device 10, as in the first embodiment described above, but the formwork installation auxiliary device 10 is not used for the other formwork 50'. The lower end 51' of the other formwork 50' can be fixed to the deck slab 2 by a fixing means such as a bolt that threads into a female threaded hole (not shown) pre-installed in the deck slab 2. The location where this fixing means such as a bolt is used is indicated by a dashed line in FIG. 7. The upper ends of the formworks 50, 50' are connected with a top bolt (not shown), thereby maintaining the distance between the formworks 50, 50'. The location where this top bolt is used is indicated by a dashed line in FIG. 7.

[0047] In this embodiment, so-called rice-planting steel material 60 is installed on the portion of the inclined surface 1 facing the planned wall construction area W, and a separator 62, one end 61 of which is welded to the upper end of this steel material 60, pulls the formwork 50 toward the inside of the planned wall construction area W, thereby increasing the degree of adhesion at the overlapping portion R. Here, the rice-planting steel material 60 is a steel material whose lower end is embedded together when the deck slab 2 is constructed (when concrete is poured), and extends vertically for a predetermined length so as to be exposed from the inclined surface 1.

[0048] In the first and second embodiments described above, the first member 31 of the height adjustment device 30 is inserted into the through-hole 21a of the base surface portion 21 of the base member 20 and the hole 5 of the inclined surface 1. Alternatively, the first member 31 may be fixed to the base surface portion 21 of the base member 20. In this case, for example, fixing the lower end of the first member 31 to the upper surface of the base surface portion 21 of the base member 20 corresponds to "the height adjustment device being provided on the base surface portion of the base member" of the present invention. Furthermore, when the lower end of the first member 31 is fixed to the upper surface of the base surface portion 21 of the base member 20, a separate fixing means may be required to fix the base member 20 to the inclined surface 1.

[0049] Furthermore, in the first and second embodiments described above, by interposing a sheet-like or tape-like sealing member at the overlapping portion R, it is possible to further suppress leakage of concrete at the overlapping portion R. Similarly, by interposing a sheet-like or tape-like sealing member between the inclined surface 1 and the base surface portion 21 of the base member 20, it is possible to suppress leakage of concrete at that location.

[0050] The illustrated embodiments are merely illustrative of the present invention, and it goes without saying that the present invention encompasses various improvements and modifications made by those skilled in the art within the scope of the claims, in addition to those directly shown in the described embodiments. [Explanation of symbols]

[0051] DESCRIPTION OF SYMBOLS 1...Sloped surface, 2...Deck, 3...Wall, 3a...Step portion, 5...Hole, 10...Formwork installation auxiliary device, 20...Base member, 21...Base portion, 21a...Through hole, 22...Wall portion, 30...Height adjustment device, 31...First member, 31a...Flange portion, 32...Second member, 32a...External thread portion, 33...Seat portion, 50, 50'...Formwork, 50a...First surface, 51, 51a, 51'...Lower end portion, 60...Steel material, 61...One end, 62...Separator, R...Overlapping portion (lap portion), W...Planned wall construction area

Claims

1. A formwork installation auxiliary device used when installing a formwork on a sloped surface of an object, a base member having a base surface portion placed on the inclined surface and a wall surface portion rising from the base surface portion; a height adjustment device provided on the base surface portion to support the formwork from below and configured to be able to adjust the height of the lower end of the formwork relative to the inclined surface; Equipped with The wall surface portion overlaps with the lower end of the formwork on the height adjustment device, a through hole is formed in the base surface portion, a lower portion of the height adjustment device is inserted into the through-hole; The base surface portion is fixed to the sloped surface by a lower portion of the height adjustment device, the height adjustment device includes a first member constituting the lower portion and a second member attached to the first member; the first member is a cylindrical member having an opening at its top and a bottom, and has a flange at the edge of the opening at its top; The second member has a male threaded portion that screws into a female threaded portion formed on an inner peripheral surface of the first member, and a plate-shaped seat portion that is connected to an upper end of the male threaded portion, A formwork installation auxiliary device in which the lower end of the formwork is placed on the seat.

2. A plurality of the height adjustment devices are provided for one of the formworks, The formwork installation auxiliary device according to claim 1 , wherein the height of the lower end of the one formwork is adjusted by the plurality of height adjustment devices so that the lower end of the one formwork is horizontal.

3. The formwork installation auxiliary device according to claim 1 or 2, wherein the height adjustment device is extendable and contractible in the vertical direction.

4. a hole is formed in a portion of the inclined surface facing the through hole; The formwork installation auxiliary device according to any one of claims 1 to 3, wherein a lower portion of the height adjustment device is inserted into the hole.

5. The formwork installation auxiliary device according to any one of claims 1 to 4, wherein the base member is formed of angle iron.

6. The formwork installation auxiliary device according to any one of claims 1 to 5, wherein the object is a concrete structure.

7. A method for pouring concrete using the formwork installed using the formwork installation auxiliary device according to any one of claims 1 to 6, laying the base member on the inclined surface; providing the height adjustment device on the base surface portion of the base member; Installing the formwork so that the wall surface portion of the base member abuts against a lower end of a first surface of the formwork on the height adjustment device; and Pouring concrete onto the first surface side of the formwork; A method for pouring concrete, including:

8. 8. The method for pouring concrete according to claim 7, wherein installing the formwork includes adjusting the height of the lower end of the formwork using the height adjustment device so that the lower end of the formwork is horizontal.

Images