JP2014227656A - Permanent form for concrete foundation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a permanent form for a concrete foundation, allowing the concrete foundation to be simply constructed and also adaptable to installation of a large-sized structure.SOLUTION: A permanent form M includes: a truncated cone-shaped body part 1; a flange part 3 on a large diameter side of the body part 1; and an anchor body holding part 7 on a small diameter side of the body part 1. The permanent form M in a state that an anchor body is mounted to the anchor body holding part 7 is arranged in an installation place of a structure, ready mixed concrete is poured into the body part 1 and hardened it, and a concrete foundation R with a part of the anchor body protruding on a top face is constructed. The number of permanent forms M to be used is determined according to a size and wind pressure load of the structure. The ready mixed concrete is hardened to construct the concrete foundation R, and then the permanent forms M are not removed from the concrete foundation R. Therefore, construction labor and time are reduced and a construction period is shortened. Countermeasure for concrete against salt damage can be achieved because the surface of the concrete foundation is conserved by the permanent forms M.

Description

  The present invention relates to a disposal form used for constructing a concrete foundation for fixing a gantry for supporting a structure to the ground surface or the like when the structure is installed on the ground surface or the like.

  Conventionally, in order to construct a photovoltaic power generation system, when installing a solar cell array on the ground surface, a concrete foundation is constructed on the ground surface, and a base made of, for example, a hot-dip galvanized steel frame is fixed to the concrete foundation. The construction method of installing the solar cell panel on this mount is adopted.

  As a means of constructing the concrete foundation, when the construction site is flat ground, a method of assembling a wooden formwork at the construction site of the concrete foundation and pouring the ready-mixed concrete into this formwork is adopted. When the construction site is inclined, a method is used in which a spiral pile is driven into the ground, a formwork is assembled on the ground, and ready-mixed concrete is poured into the formwork and hardened. In addition, as a factory construction method, a method is adopted in which a concrete block is produced in advance by pouring raw concrete into a formwork assembled in a factory and then carrying the concrete block to a construction site as a concrete foundation.

  Patent Document 1 describes a stand for a solar cell panel on which a solar cell panel can be installed without constructing a concrete foundation. This pedestal is mounted on a panel installation place, a holder part for holding the solar battery panel, a fixing member for fixing the solar battery panel to the holder part, and the solar battery by its own weight or an additional load of its own weight and another member And a foundation for stabilizing the panel from moving from the panel installation location. In the gantry, for example, the holder part and the legs as the foundation part are made of concrete, and the fixing member is made of rubber. According to the above-mentioned gantry, it is possible to perform desired installation simply by placing the solar cell panel in the holder portion and placing it at the installation location, and it is not necessary to provide a separate foundation. It is said that the effect can be greatly reduced and the installation position can be easily changed.

JP 2003-221906 A

  When the conventional concrete foundation is constructed by an on-site construction method, it is necessary to assemble the formwork at the construction site, to remove the formwork after the concrete is hardened, and to carry out the removed formwork. There is a problem that construction work requires labor. In the case of the factory construction method, there is a problem that a place for storing a concrete block manufactured in advance is required.

  In order to stabilize the solar panel so that the solar panel does not move from the panel installation place without using a concrete foundation, for example, the holder and the legs as the foundation are made of concrete and the overall weight of the pedestal of Patent Document 1 is reduced. It is getting bigger. For this reason, there is a problem that the gantry itself becomes a heavy object, and handling such as conveyance work and installation work is not easy. It is also described that the base part and the holder part can be disassembled into a plurality of members, and the weight per member is reduced as an assembly type that can be assembled. However, in this case, a place for storing a large number of members is required, which causes a problem that the labor for inventory management of the large number of members increases. Further, the pedestal described in Patent Document 1 has a problem that it is difficult to apply to installation of a large-sized solar cell array using a large number of solar cell panels.

  An object of the present invention is to provide a concrete foundation discarding form that can easily construct a concrete foundation and can be used for installation of a large structure.

The present invention is a throwaway formwork of a concrete foundation made of a synthetic resin and used to construct a concrete foundation including the anchor body by curing the ready-mixed concrete filled with the anchor body.
A main body composed of a truncated cone-shaped cylinder;
A flange portion projecting outward from the opening end portion on the large diameter side of the main body portion;
An anchor body holding portion which is disposed so as to cross an opening surrounded by an opening end portion on the small diameter side of the main body portion and has a longitudinal body having a shaft hole through which the anchor body can be inserted. It is a discarded formwork of concrete foundation.

In the present invention, the flange portion is
A plate-like flange wall portion projecting outward from an opening end portion on the large diameter side of the main body portion;
An outer peripheral water stop wall portion projecting from the outer peripheral portion of the flange wall portion to the opposite side of the main body portion over the entire periphery;
An inner peripheral water stop wall portion that protrudes to the opposite side of the main body portion over the entire circumference inside the outer peripheral water stop wall portion of the flange wall portion.

  In addition, the present invention is characterized in that it further includes a cylindrical opening wall portion that continues to the opening end portion on the small diameter side of the main body portion and protrudes in a direction away from the main body portion.

  Further, the present invention is characterized in that a plurality of reinforcing ribs projecting outward from the outer surface of the main body portion are provided radially at the opening end portion on the small diameter side.

  The concrete foundation discarding form (hereinafter simply referred to as “discarding formwork”) according to the present invention is a structure in which an anchor body such as an anchor bolt is inserted and attached to the shaft hole of the anchor body holding part. A concrete foundation having a part of the anchor body protruding on the upper surface is constructed by pouring the ready-mixed concrete into the main body and hardening it. A structure can be installed on the concrete foundation by using an anchor body to fix the structure or a frame that supports the structure.

  According to the abandoned formwork according to the present invention, the required number of abandoned formwork is arranged at the installation location of the structure based on the size of the structure to be installed and the wind pressure load, A concrete foundation can be constructed simply by pouring ready-mixed concrete and hardening it. Therefore, it is possible to easily construct a concrete foundation adapted to a structure having a different size, and it is possible to cope with installation of a large structure. Moreover, since the concrete foundation was constructed by curing the ready-mixed concrete poured into the abandoned formwork, this abandoned formwork is not removed from the concrete foundation. This reduces the time and effort required for the construction. In addition, since the surface of the concrete foundation is protected by the formwork, it is possible to take measures against salt damage to the concrete.

  Since the main body part is formed of a truncated cone-like cylinder, the internal pressure of the discard mold according to the present invention acts evenly on the inner surface of the main body part when the ready-mixed concrete is poured. Moreover, when the ready-mixed concrete in a main-body part hardens | cures, the expansion pressure of concrete acts on the inner surface of a main-body part equally also at this time. Therefore, it is difficult for the main body portion to deform or expand.

  Since the discard mold has a flange portion that protrudes outward from the opening end portion on the large diameter side of the main body portion, a stable arrangement state is obtained.

  Furthermore, since a plurality of truncated cone-shaped main body portions can be stacked, the packing volume can be reduced and the storage space can be saved.

  Since the anchor body holding part is arranged so as to cross the opening of the opening end on the small diameter side of the main body part, the anchor body such as the anchor bolt is held by the anchor body holding part before pouring the concrete into the main body part. Can be attached to the main body. Since the anchor body is fixed integrally with the hardened concrete foundation, which is poured into the main body, there is no need to firmly fix the anchor body to the anchor body holding portion.

  Moreover, according to this invention, the outer peripheral side water stop wall part which a flange part protrudes over the perimeter from the outer peripheral part of a flange wall part, and the inner peripheral side water stop wall part which protrudes over the perimeter inside a flange wall part, Thus, water generated from the ready-mixed concrete poured into the main body is prevented from flowing out of the discarded formwork.

  In addition, according to the present invention, since it further includes a cylindrical opening wall portion projecting continuously from the opening end portion on the small diameter side of the main body portion, when the discard frame is disposed on the inclined surface, Even if the upper surface of the concrete is inclined with respect to the opening surface on the small diameter side of the main body portion, it is possible to prevent the ready-mixed concrete from spilling out from the main body portion by the cylindrical opening wall portion.

  Further, according to the present invention, the plurality of reinforcing ribs projecting outward from the outer surface of the main body portion on the small-diameter side opening end portion are provided radially, so that the small-diameter side opening end portion receives pressure from the ready-mixed concrete. Prevents deformation due to expansion pressure when hardening concrete. Further, when arranging a plurality of discarded molds side by side, the reinforcing rib can be used for positioning of each discarded mold, for example, a black ink standard.

1A and 1B show a solar cell array Q constructed using a discarded formwork M according to the present invention, in which FIG. 1A is a perspective view seen from the front side, and FIG. 1B is a perspective view seen from the back side. FIG. FIGS. 2A and 2B are perspective views as viewed from the upper surface side, and FIG. 2B are perspective views as viewed from the bottom surface side, respectively, showing a discarded mold frame M according to an embodiment of the present invention. FIG. 3A is a front view and FIG. 3B is a plan view showing a discarded mold M according to an embodiment of the present invention. FIG. 4 (A) is a bottom view of a discarded mold M according to an embodiment of the present invention, and FIG. 4 (B) is a bottom view showing a different embodiment of the anchor body holding portion 7. It is a perspective view explaining the point which attaches the anchor bolt 20 as an anchor body to the discarding formwork M which concerns on one Embodiment of this invention. It is a perspective view which shows the state which attached the anchor bolt 20 as an anchor body to the discarding formwork M which concerns on one Embodiment of this invention. It is a perspective view which shows the condition where the ready-mixed concrete C was poured in into the main-body part 1 of the discard mold M which concerns on one Embodiment of this invention. It is a perspective view showing the situation where a plurality of discarded formwork M concerning one embodiment of the present invention was piled up.

  The discarded formwork M according to the present invention is used to construct a concrete foundation R on which a structure is installed on the ground surface or the like. In the present embodiment, a case where the discarded mold M is used for construction of a concrete foundation R for installing the solar cell array Q on the ground surface will be described. The discarded formwork M according to the present invention can also be used to construct a concrete foundation of a structure other than the solar cell array Q.

  FIG. 1 shows a solar cell array Q constructed by using a discarded formwork M according to the present invention. FIG. 1 (A) is a perspective view seen from the front side, and FIG. 1 (B) is a back side. It is the perspective view seen from. The solar cell array Q includes a plurality of solar cell panels P, a gantry K that supports each solar cell panel P, and a concrete foundation R for installing the gantry K on the ground surface. In this example, 40 solar cell panels P arranged in a vertical direction (short-side direction) and four in a horizontal direction (long-side direction) are supported by a base K, and the base K is The solar cell array Q is constructed by fixing to a total of 12 concrete foundations R arranged in two in the vertical direction and six in the horizontal direction through anchor bodies such as anchor bolts. The dimensions of the solar cell panel P are, for example, a length in the short side direction of about 1 m and a length in the long side direction of about 1.6 m. Therefore, the dimensions of the panel portion of the solar cell array Q are about 4 m in length and about 16 m in width.

  The discarded formwork M for constructing the concrete foundation R has, for example, a structure shown in FIGS. 2 to 4 show a discarded mold M according to an embodiment of the present invention, in which FIG. 2A is a perspective view seen from the top surface side, and FIG. 2B is seen from the bottom surface side. 3 (A) is a front view, FIG. 3 (B) is a plan view, FIG. 4 (A) is a bottom view of a discarded formwork M, and FIG. 4 (B) is a different implementation of the anchor body holding portion 7. It is a bottom view which shows a form.

  The discard mold M is manufactured by injection molding or blow molding using a synthetic resin such as polyethylene or polypropylene. The discarded form frame M includes a main body 1 made of a truncated cone-shaped cylinder, an open top and bottom, a flat flange portion 3 projecting outward from an opening end 2 on the large diameter side of the main body 1, and a main body. A curved wall portion 5 having a curved surface that protrudes outwardly from the opening end 4 on the small-diameter side of the portion 1, and a cylindrical shape that continues to the curved wall portion 5 and protrudes away from the main body portion 1. And an opening wall portion 11. The dimensions of the discard mold M of the present embodiment are, for example, that the diameter of the opening end 2 on the large diameter side of the main body 1 is about 800 mm, the diameter of the opening end 4 on the small diameter side is about 500 mm, and the height is about 500 mm. The thickness of the main body 1 is about 2.5 mm.

  The opening wall portion 11 is provided with an anchor body holding portion 7 which is disposed so as to cross the opening 11a and is formed of a longitudinal body having a shaft hole 6 into which an anchor body such as an anchor bolt 20 can be inserted. As shown in FIG. 4B, the anchor body holding part 7 may be a cross-shaped member in which two longitudinal bodies 7A and 7B are combined at a right angle. By attaching the cross-shaped anchor body holding part 7, the advantage that the opening wall part 11 becomes more difficult to deform is obtained. Further, the shaft hole 6 of the anchor body holding portion 7 is not necessarily at the center position, and a plurality of shaft holes 6 may be formed. Furthermore, the anchor body holding part 7 may be formed integrally with the main body part 1 of the discard mold M, or may be attached to the main body part 1 after being manufactured separately.

  The flange portion 3 includes a flat-plate-shaped flange wall portion 8 that protrudes outward from the opening end portion 2 on the large-diameter side of the main body portion 1, and the opposite side of the main body portion 1 from the outer peripheral portion of the flange wall portion 8 over the entire circumference. The outer peripheral water stop wall portion 9 protruding to the inner periphery of the flange wall portion 8 or the inner peripheral portion of the outer peripheral side water stop wall portion 9 and the inner peripheral side stop protruding to the opposite side of the main body 1 over the entire circumference. And a water wall 10. The outer peripheral side water blocking wall portion 9 and the inner peripheral side water blocking wall portion 10 are for preventing water generated from the ready-mixed concrete poured into the main body portion 1 from flowing out. Furthermore, on the flange wall portion 8, connecting ribs 14 that connect the outer peripheral side water stop wall portion 9 and the inner peripheral side water stop wall portion 10 are formed radially. The formation position of the connecting rib 14 is a position facing the second reinforcing rib 13 described later with the flange wall portion 8 interposed therebetween.

  At the four corners of the flange wall portion 8, through holes 8 a are formed through which simple anchor members for temporarily fixing the discarded mold M to the installation location are inserted. For the temporary anchor simple anchor member, when the disposal frame M is installed on the ground, a synthetic resin or metal anchor pin having a length of about 100 to 250 mm is used. If the installation location is concrete, a concrete pin may be used.

  In the present embodiment, the flange portion 3 is formed so that the shape in plan view is a square with rounded corners. When arranging a plurality of discarded molds M, the discarded molds M are accurately arranged as designed by adjusting the straight edges of the flanges 3 in each discarded mold M to be aligned on the same straight line. Easy to do. In addition, the planar view shape of the flange part 3 is good also as regular polygons, such as a regular hexagon and a regular octagon other than a square.

  A plurality of reinforcing ribs 12 projecting outward from the outer surface of the opening wall 11 are provided radially on the opening end 4 on the small diameter side of the main body 1. In the present embodiment, the reinforcing rib 12 is disposed so as to divide the periphery of the opening wall portion 11 into eight equal parts. Therefore, the two opposing reinforcing ribs 12 are symmetrical with respect to the central axis X of the opening 11a, and the angle formed by the two adjacent reinforcing ribs 12 and the central axis X is 45 degrees. The height of the reinforcing rib 12 is the same as or slightly lower than the opening wall portion 11.

  The opening end 2 on the large diameter side of the main body 1 is formed in a right cylindrical shape, and a plurality of second reinforcing ribs 13 protruding outward from its outer surface are provided radially. The outer surface of the large-diameter opening end 2 may be a tapered surface connected to the main body 1 instead of a right cylinder. In the present embodiment, the second reinforcing rib 13 is disposed so as to divide the periphery of the main body 1 into 16 equal parts. Accordingly, the two opposing second reinforcing ribs 13 are symmetric with respect to the central axis X of the opening 11a, and the angle formed by the two adjacent reinforcing ribs 12 and the central axis X is 22.5 degrees.

  By providing the reinforcing rib 12 and the second reinforcing rib 13, the two open end portions 2, 4 of the main body 1 are affected by the pressure received from the ready-mixed concrete poured into the main body 1 and the expansion pressure when the concrete is hardened. It is possible to prevent deformation. Note that the number of reinforcing ribs 12 and second reinforcing ribs 13 formed can be changed as appropriate.

  The reinforcing rib 12 on the small diameter side is configured such that a line connecting two opposing reinforcing ribs 12 always passes through the central axis X. Therefore, for example, by using one set of two opposing reinforcing ribs 12 and another set of reinforcing ribs 12 at a position rotated by 90 degrees with respect to the central axis X from the one set, the discard type is used. The central axis X of the frame M can be easily obtained. Therefore, when a plurality of discarded molds M are arranged, the use of the reinforcing rib 12 as a reference for blacking out has an advantage that the discarded mold M can be accurately positioned.

  Next, a procedure for constructing a concrete foundation R used for construction of the solar cell array Q as shown in FIG. 1 using the discarded formwork M of the present embodiment will be described. First, after leveling the installation location of the solar cell array Q, the arrangement of the discarded molds M at this location is determined. In the example of FIG. 1, twelve discarded molds M are arranged in 2 rows and 6 columns. The interval between the discarded molds M is determined in advance based on the size and structure of the gantry K.

  FIG. 5 is a perspective view for explaining a procedure for attaching the anchor bolt 20 as the anchor body to the discarding mold M according to the embodiment of the present invention, and FIG. 6 is a discarding mold M according to the embodiment of the present invention. Fig. 7 is a perspective view showing a state in which the ready-mixed concrete C is poured into the main body 1 of the discarded mold M according to the embodiment of the present invention. FIG. Ready-mixed concrete is a mixture of cement, water, fine aggregates such as sand, and coarse aggregates such as gravel.

  An anchor body such as the anchor bolt 20 shown in FIG. The anchor body of this example is made of stainless steel or the like, and includes a long anchor bolt 20 having a weight portion 22 at the lower end and a nut 21 screwed to the anchor bolt. As shown in FIG. 6, the anchor bolt 20 is inserted into the shaft hole 6 of the anchor body holding portion 7 from the lower side of the discard mold M, and the nut 21 is screwed to the portion protruding upward. Then, the nut 21 is rotated to change the screwing position, thereby adjusting the upward protruding length of the anchor bolt 20 to be appropriate. A play is provided between the anchor bolt 20 and the shaft hole 6, and the anchor bolt 20 can be pivoted by its own weight by bringing a nut 21 screwed into the anchor bolt 20 into contact with the anchor body holding portion 7. Adjust the posture so that the mind is vertical. Thereby, for example, even when the discard mold M is installed on the inclined surface and the axis of the main body 1 does not follow the vertical direction, the axis of the anchor bolt 20 can be set in the vertical direction.

  In this way, the disposal form M to which the anchor body such as the anchor bolt 20 is attached is arranged at a predetermined construction location of the concrete foundation R. In that case, when the construction location is the ground, a depression may be provided in each construction location. If the discard mold M is arranged, a simple anchor member is inserted into the through hole 8a of each flange portion 3 to temporarily fix the discard mold M. Furthermore, you may arrange | position the reinforcing bar in the main-body part 1 as needed.

  Subsequently, the ready-mixed concrete is poured into the main body 1 of each disposal mold M from the upper opening 11a, and the main body 1 is filled with ready-mixed concrete as shown in FIG. Since the inner surface of the curved wall portion 5 is a curved surface, it is easy for air mixed in the ready-mixed concrete to escape to the outside. The ready-mixed concrete is filled up to the lower end position of the opening wall portion 11. In the case where the disposal frame M is installed at an inclined surface, the upper surface of the ready-mixed concrete is inclined with respect to the opening surface of the opening wall portion 11, but the ready-made concrete flows out from the main body portion 1 by the cylindrical opening wall portion 11. Is blocked.

  The ready-mixed concrete poured into the main body 1 is eventually cured to construct the concrete foundation R. At that time, the anchor bolt 20 is fixed integrally with the concrete foundation R. Since the concrete foundation R is in close contact with the ground of the construction site, it generates resistance against skidding. If a depression is provided in advance on the ground of the construction site, the concrete foundation R is cured in a state of being fitted in the ground, and a greater resistance against skidding can be expressed.

  When the concrete foundation R is constructed in this way, the gantry K is fixed using the anchor bolts 20 integrated with the concrete foundation R, and the solar battery panel P is attached to the gantry K. Can be constructed.

  The size of the discarded formwork M is determined based on the number of concrete foundations R constructed, the weight of the concrete foundation R constructed by the discarded formwork M, and the wind pressure load and fixed load of the structure to be constructed. The That is, the fixed load of the structure including the concrete foundation R is designed to exceed the wind pressure load of the structure.

As a specific example, the solar cell array Q in FIG. 1 is composed of 40 solar cell panels P. Each solar cell panel P has a size of 1600 mm × 1000 mm, and the weight per one is 19 kg. . The weight of the gantry K is 630 kg.
Wind pressure load W (unit N) per solar cell panel P is expressed by the product of wind force coefficient Cw, design speed pressure q (unit N / m ² ), and wind receiving area Aw (unit m ² ). The That is,
W = Cw × q × Aw.
Here, the design speed pressure q is expressed by q = 0.6 × Vo ² × E × I using the design reference wind speed Vo, the environment coefficient E, and the application coefficient I.
The wind force coefficient Cw is expressed as Cw = 0.71 + 0.016θ (θ is the installation angle of the panel), assuming that the back wind (negative pressure) acts on the solar cell panel P installed alone on the ground. θ = 15 degrees. Therefore, Cw = 0.71 + 0.016 × 15 = 0.95 is adopted.
The design reference wind speed Vo is generally set in a range of 30 to 46 m / S, and Vo = 34 is used in this example.
As the environmental coefficient E, ground surface roughness classification = III is selected and E = 1.19 is used.
As the application coefficient I, I = 1.0 is used assuming a normal photovoltaic power generation system.
The wind receiving area Aw is the panel area of the solar battery panel P, and Aw = 1.6 × 1.0 = 1.6 is used.

From the above, the wind pressure load W per solar cell panel P is
W = Cw × 0.6 × Vo ² × E × I × Aw
= 0.95 x 0.6 x 34 ² x 1.19 x 1.0 x 1.6 = 1255 (N)
= 128 (kgf).
Therefore, the wind pressure load Wq of the solar cell array Q using 40 solar cell panels P is
Wq = 128 × 40 = 5120 (kgf).

The fixed load G (kgf) of the solar cell array Q is the sum of the weight Gp of 40 solar cell panels P, the weight Gk of the gantry K, and the total weight Gr of the concrete foundation R,
G = Gp + Gk + Gr = 19 × 40 + 630 + Gr = 1390 + Gr (kgf).
In order for the fixed load G of the solar cell array Q to exceed the wind pressure load Wq of the solar cell array Q, it is necessary that 1390 + Gr> 5120, that is, Gr> 5120-1390 = 3730. Since there are 12 concrete foundations R, the weight Gx per concrete foundation R is
It is necessary to make Gx> 3730 ÷ 12 = about 311 (kgf).
If the concrete density is about 2300 kgf / m ³ , the above condition can be satisfied if the volume per disposal mold M is 311 ÷ 2300 = about 0.135 m ³ .

In this embodiment, since the volume of the discarded formwork M is about 0.188 m ³ , the total weight of the concrete foundation R constructed using 12 of these discarded formwork M is:
0.188 × 2300 × 12 = about 5188 (kgf). Therefore, this solar cell array Q has a fixed load G sufficiently larger than the wind pressure load Wq.

  FIG. 8 is a perspective view showing a state in which a plurality of discarded molds M according to an embodiment of the present invention are stacked. Since the main body part 1 of the discard mold M is formed in a truncated cone shape having a small diameter on the upper side and a large diameter on the lower side, it is possible to stack a plurality. As shown in FIG. 8, if a plurality of discarded molds M are stacked, the space required for storage can be reduced and the material required for packaging can be reduced, so that the cost can be reduced.

  As described above, the discarded formwork M according to the present invention is for constructing the concrete foundation R by the on-site construction method, and is prepared by increasing / decreasing the number used or by different volume per unit. By doing so, it is possible to easily cope with structures having different dimensions and wind pressure loads. Since the anchor body holding portion 7 is provided, an anchor body such as the anchor bolt 20 can be easily attached. Since the anchor body is fixed integrally with the concrete foundation R after the concrete is hardened, the anchor body exhibits an effect that the structure can be reliably installed.

  The present invention is not limited to the above-described embodiment, and can be changed as appropriate according to the state of implementation.

M Disposable mold 1 Main body part 2 Large-diameter side open end part 3 Flange part 4 Small-diameter side open end part 5 Curved wall part 6 Shaft hole 7 Anchor body holding part 8 Flange wall part 8a Through hole 9 Outer peripheral side water blocking wall Part 10 Inner peripheral side water blocking wall part 11 Opening wall part 11a Opening 12 Reinforcement rib 13 Second reinforcement rib 14 Connection rib 20 Anchor bolt (anchor body)
21 Nut 22 Weight part C Ready-mixed concrete K Base P Solar panel Q Solar array R Concrete foundation

Claims (4)

It is a discarded formwork of a concrete foundation, which is made of synthetic resin and is used to construct a concrete foundation including an anchor body by curing the ready-mixed concrete filled with the anchor body.
A main body composed of a truncated cone-shaped cylinder;
A flange portion projecting outward from the opening end portion on the large diameter side of the main body portion;
An anchor body holding portion which is disposed so as to cross an opening surrounded by an opening end portion on the small diameter side of the main body portion and has a longitudinal body having a shaft hole through which the anchor body can be inserted. Discarded formwork of concrete foundation. The flange portion is
A plate-like flange wall portion projecting outward from an opening end portion on the large diameter side of the main body portion;
An outer peripheral water stop wall portion projecting from the outer peripheral portion of the flange wall portion to the opposite side of the main body portion over the entire periphery;
The inner wall side water stop wall part which protrudes to the opposite side to the said main-body part over the perimeter inside the said outer peripheral side water stop wall part of the said flange wall part, It is characterized by the above-mentioned. Abandoned formwork for concrete foundations.   3. The discard of a concrete foundation according to claim 1, further comprising a cylindrical opening wall portion that continues to an opening end portion on a small diameter side of the main body portion and protrudes in a direction away from the main body portion. Formwork.   The concrete according to any one of claims 1 to 3, wherein a plurality of reinforcing ribs projecting outward from the outer surface of the main body portion are provided radially at the opening end portion on the small diameter side. Abandoned formwork for the foundation.

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