JP2021071011A - Construction method of foundation, and foundation - Google Patents

Abstract

To provide a construction method of a foundation capable of securing quality of a foundation easily with high accuracy.SOLUTION: In a construction method of a foundation, a formwork 10 is installed and concrete is placed. The formwork 10 comprises a first pair 11 of formworks and a second pair 12 of formworks respectively corresponding to two foundation standing portions parallel to each other. The method includes a step of placing concrete in a state where upper portions of the first pair 11 of formworks and the second pair 12 of formworks are connected with each other by a connection member 30 which is perpendicular to the first pair 11 of formworks and the second pair 12 of formworks. The connection member 30 connects the first pair 11 of formworks with the second pair 12 of formworks at a position where the first pair 11 of formworks and the second pair 12 of formworks are not connected with each other by the other pair of formworks.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method of constructing a foundation of a building and a foundation.

Conventionally, the foundation of a building is constructed by placing concrete in a formwork installed on the ground (ground). For example, as a solid foundation construction method, a step of placing concrete in a foundation slab (base portion) covering the ground and a step of placing concrete in a foundation rising portion erected on the foundation slab are separately performed. A construction method called "double strike" is often adopted. When adopting this double-casting construction method, it is necessary to wait for the concrete of the foundation slab to dry and harden sufficiently before performing the concrete casting process at the rising part of the foundation, which increases the construction period. There's a problem. In addition, since it is necessary to prepare a ready-mixed concrete car, a pump car, etc. in two days, the cost is likely to increase.

As a method for solving the above-mentioned problem of double casting, a construction method called "integral casting" is known in which a foundation slab and a rising portion of a foundation are formed at the same time in a single concrete casting process. In the case of this one-piece striking, of the pair of formwork arranged facing each other to form the outer peripheral rising portion located on the outer peripheral portion of the foundation, the outer formwork on the outdoor side (outer formwork component) is on the indoor side. It is necessary to install the inner formwork (inner formwork component) at a position higher by the thickness of the foundation slab.

For example, Patent Document 1 discloses a support metal fitting for installing the inner mold in a state of being supported at a position higher than the outer mold, and a method of performing integral striking using the support metal fitting. According to this construction method, the concrete on the outer peripheral rising portion and the concrete on the foundation slab (base portion) can be efficiently placed in the same process as a series of operations.

By the way, when the inner formwork of the outer peripheral rising portion is installed at a position higher than the outer formwork as described above, the concrete poured into the formwork is placed in the outer formwork having a height dimension larger than that of the inner formwork. A large amount of pressure will be applied until the concrete dries and solidifies. As a result, the outer formwork may be displaced so as to bulge toward the outside, and the accuracy of the shape and position of the rising portion of the foundation may be lowered.

In order to suppress such displacement of the formwork, for example, a method of supporting the formwork from the outside by using a stretchable support member extending diagonally from the upper part of the formwork to the installation surface has been proposed ( For example, see Patent Document 2). Then, it is said that the formwork can be maintained at an appropriate position by expanding and contracting the support member while checking the core when placing concrete and pushing and pulling the formwork.

Japanese Patent No. 5339832 Japanese Patent No. 5665006

However, in the case of the method of adjusting the position of the formwork while supporting the formwork from the outside with the support member as described above, the quality tends to vary depending on the skill of the craftsman, and the support member is operated until the concrete hardens. Since it is necessary to continuously adjust the position of the formwork, there is a problem that it takes time and effort.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a foundation construction method and a foundation capable of ensuring the quality of the foundation easily and with high accuracy.

The foundation construction method according to the present invention is a foundation construction method in which a formwork is installed and concrete is placed.
The formwork includes a first formwork pair and a second formwork pair corresponding to two parallel rising portions of the foundation, respectively.
A step of placing concrete in a state where the upper portions of the first formwork pair and the second formwork pair are connected by a connecting member orthogonal to the first formwork pair and the second formwork pair. Including
The connecting member connects the first formwork pair and the second formwork pair at a position where the first formwork pair and the second formwork pair are not connected to each other by another formwork pair. It is characterized by that.

In the construction method of the present invention, it is preferable that the connecting member is an anchor ruler capable of positioning the anchor bolt with respect to the formwork.

Further, in the construction method of the present invention, a plurality of the anchor rulers are installed in the formwork, and some of the anchor rulers among the plurality of anchor rulers are used to position the anchor bolts. It is used, and it is preferable that some other anchor rulers are used as the connecting member.

Further, in the floor structure of the present invention, the formwork is arranged so that the cores of the foundation are spaced so as to correspond to a predetermined module dimension.
The connecting member is the anchor ruler corresponding to the predetermined module size.
Each of the formwork and the anchor ruler is provided with a hole capable of fixing the anchor ruler to the upper part of the first formwork pair and the second formwork pair by inserting a pin member.
When the anchor ruler as the connecting member is fixed to the upper part of the first formwork pair and the second formwork pair by using the pin member, the first formwork pair and the second formwork pair Is preferably configured to be positioned at intervals corresponding to the predetermined module dimensions.

Further, in the construction method of the present invention, the foundation is a solid foundation.
In the step of placing concrete, it is preferable to place concrete without connecting the foundation slab of the solid foundation and the rising portion of the foundation.

Further, in the construction method of the present invention, at least one of the first formwork pair and the second formwork pair corresponds to the outer peripheral rising portion located on the outer peripheral portion of the solid foundation. preferable.

The foundation according to the present invention is a foundation formed by installing a formwork and placing concrete.
The formwork includes a first formwork pair and a second formwork pair corresponding to two parallel rising portions of the foundation, respectively.
Concrete is cast in a state where the upper portions of the first formwork pair and the second formwork pair are connected by a connecting member orthogonal to the first formwork pair and the second formwork pair.
The connecting member connects the first formwork pair and the second formwork pair at a position where the first formwork pair and the second formwork pair are not connected to each other by another formwork pair. It is characterized by that.

According to the present invention, it is possible to provide a foundation construction method capable of ensuring the quality of the foundation easily and with high accuracy.

It is a perspective view which shows the formwork and the connecting member used in the construction method of the foundation as one Embodiment of this invention. It is a top view which shows an example of the anchor ruler used in the construction method of the foundation as one Embodiment of this invention. It is a vertical cross-sectional view of the formwork shown in FIG. 1 and an anchor ruler as a connecting member.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The same reference numerals are given to the configurations common to each figure.

Here, an example of a building to which the foundation construction method of the present embodiment can be applied will be described. The building can be, for example, a two-story house with a steel frame. In addition, the building is composed of a foundation structure fixed to the ground and an upper structure fixed on the foundation structure.

The foundation structure is located below the superstructure and supports its framework, and can be, for example, a foundation of a reinforced concrete structure. The superstructure is arranged on a frame (framework) composed of a plurality of columns and a plurality of beams erected between the columns, an outer wall arranged on the outer peripheral side of the frame, and beams constituting the frame. It can be configured to include floors and roofs on each floor. The members constituting the framework can be standardized (standardized) in advance, manufactured in advance at the factory, and then carried to the construction site for assembly.

The building is constructed based on preset module dimensions (planar modules). The "module dimension" means a basic dimension that serves as a design standard in architecture, and can be, for example, 305 mm.

The "street" of a building is a reference line set along two directions orthogonal to each other in the plan view of the building. The spacing between parallel streets is an integral multiple of the module dimensions. In addition, the center line (center of the foundation) in the width direction of the rising portion of the foundation is set so as to coincide with the center of the building.

FIG. 1 shows an installation example of a formwork 10 for constructing the foundation of a building such as a house and a plurality of anchor rulers 30, 40, 50 fixed to the upper part of the formwork 10 (an example of a formwork installation structure). Shown. The formwork 10 is installed based on the foundation plan, and reinforcing bars or the like can be installed inside the formwork 10. The formwork 10 is a member for constructing a foundation by pouring concrete into it and hardening it (placing concrete), and is removed after the concrete has hardened. The anchor rulers 30, 40, and 50 shown in FIG. 1 are also members that are removed together with the formwork 10 after the concrete has hardened. The formwork 10 and the anchor rulers 30, 40, and 50 can be standardized (standardized) in advance, manufactured in advance at the factory, and then carried to the construction site for assembly. The formwork 10 and the anchor rulers 30, 40, 50 can be made of, for example, steel, but are not limited thereto.

As shown in FIG. 1, the formwork 10 includes a first formwork pair 11 and a second formwork pair 12 corresponding to two foundation rising portions 62 (see FIG. 3) parallel to each other. Further, the formwork 10 of this example includes a third formwork pair 13 (another formwork pair) that connects the first formwork pair 11 and the second formwork pair 12. The third formwork pair 13 is orthogonal to the first formwork pair 11 and the second formwork pair 12. The lower ends of the formwork pairs 11, 12, and 13 of the formwork 10 are fixed to the ground via a steel support member (not shown) or the like.

In this example, the first formwork pair 11 and the third formwork pair 13 correspond to the outer peripheral rising portion 62a (see FIG. 3) located on the outer peripheral portion of the foundation, and the second formwork pair 12 is the outer circumference. It corresponds to the inner rising portion 62b located on the indoor side of the rising portion 62a. The two formwork pairs connected by a connecting member such as the anchor ruler 30 may both correspond to the outer peripheral rising portion or both may correspond to the inner rising portion.

Each formwork pair 11 and 12 has a pair of formwork constituents (11a, 11b, 12a) arranged to face each other at positions corresponding to both side surfaces of the foundation rising portion 62. The first formwork pair 11 of this example is composed of an outer formwork component 11a on the outdoor side and an inner formwork component 11b on the indoor side. The inner formwork component 11b is supported by a steel support member or the like at a position higher than the outer formwork member 11a (upper in the vertical direction) (see FIG. 3). Further, the outer formwork component 11a has a height dimension in the vertical direction larger than that of the inner formwork member 11b by the thickness of the foundation slab. Further, the second formwork pair 12 is composed of a pair of common inner formwork constituent portions 12a. The inner formwork component 12a of this example can have the same height dimension as the inner formwork member 11b of the first formwork pair 11. In that case, the inner formwork component 12a and the inner formwork member 11b may be formed of a common member.

An upper flange 15 is provided on the upper part of each of the formwork pairs 11 and 12. Further, the upper flange 15 is formed with a plurality of holes 16 into which the pin member 17 can be inserted. The hole 16 penetrates the upper flange 15. The position of each hole 16 corresponds to a preset module dimension.

The anchor ruler 30 as a connecting member is a first formwork at a position where the first formwork pair 11 and the second formwork pair 12 are not connected to each other by another formwork pair such as the third formwork pair 13. It is used as a connecting member that connects the pair 11 and the second formwork pair 12 to each other.

Further, the anchor ruler 50 as a positioning member for the anchor bolt is at a position where the first formwork pair 11 and the second formwork pair 12 are connected to each other by the third formwork pair 13, and the first formwork pair 11 And the second formwork pair 12 are connected. The anchor ruler 50 is arranged above the third formwork pair 13 at a position where the third formwork pair 13 and the anchor ruler 50 overlap in a plan view, and the center line in the width direction of the anchor ruler 50 is the first. It matches the center of the 3 formwork pair 13. The anchor ruler 40 fixed to the first formwork pair 11 and the second formwork pair 12 has the center line in the width direction of each anchor ruler 40 as the first formwork pair 11 and the second formwork pair 12. They are arranged so as to match each core.

In the example shown in FIG. 1, the anchor ruler 30 as a connecting member has a shape common to the anchor rulers 40 and 50 as a positioning member for positioning the anchor bolt with respect to the mold 10.

Here, an example of the anchor ruler 30 (and the anchor rulers 40 and 50) will be described with reference to FIG. The anchor ruler 30 is formed by forming various holes 32 to 35 in a rectangular flat plate-shaped main body plate 31 made of, for example, a steel material.

Reference points P1 to P4 corresponding to the module dimensions are set in the anchor ruler 30. The reference points P1 to P4 are located on the center line C in the width direction of the anchor ruler 30. The interval between the reference points P1 to P4 is an integral multiple of the module size.

Further, the anchor ruler 30 has a plurality of holes 32 for fixing the anchor ruler 30 to the formwork 10 by using the pin member 17. That is, the hole 32 corresponds to the hole 16 at the upper part of the mold 10 and is provided at a position corresponding to the module size. Further, each hole 32 penetrates the main body plate 31 in the thickness direction. The pin member 17 may have a shape extending linearly and having a shape in which the tip gradually becomes thinner, but the present invention is not limited to this, and the pin member 17 can be appropriately changed.

As shown in FIG. 2, holes 32 are formed at four locations around each reference point P1 to P4, that is, at a total of 16 locations in this example. Further, the four holes 32 provided around the reference points P1 to P4 are arranged at the corners of a square (see the alternate long and short dash line S) centered on the reference points P1 to P4. .. As a result, even when the anchor rulers 30 are stacked so as to be parallel to the formwork pairs 11, 12, and 13, they are arranged at positions orthogonal to the formwork pairs 11, 12, and 13. However, the anchor ruler 30 can be fixed to each formwork pair 11, 12, 13 using the common hole 32. When fixing the anchor ruler 30 to each formwork pair 11, 12, 13, all of the four holes 32 corresponding to any of the reference points P1 to P4 are used (that is, the pin member 17 is used in the four holes 32). Is preferable from the viewpoint of fixing strength and the like, but only three or less of the four holes 32 may be used. When all of the four holes 32 corresponding to any of the reference points P1 to P4 are used, the pair of formwork components (11a, 11b, 12a) constituting each formwork pair 11 and 12 are used. Since it will be connected, it will be possible to further enhance the foundation construction system. That is, it is more desirable from the viewpoint of improving the accuracy of the foundation to connect the pair of formwork components (11a, 11b, 12a) constituting the formwork pairs 11 and 12 with the connecting member.

In addition to the above hole 32, a support hole 33 for supporting an anchor bolt (not shown) and a rod-shaped vibrator (not shown) may be inserted into the anchor ruler 30 of this example. A confirmation hole 34 for confirming the leveling state of concrete and an injection hole 35 for inputting concrete are formed. The anchor ruler 30 is configured so that the anchor bolts are positioned with respect to the formwork 10 by inserting the anchor bolts into the support holes 33 of the anchor ruler 30 fixed to the formwork 10.

Further, the shape of the anchor ruler 30, the arrangement and shape of the holes 32 to 35, the number thereof, and the like are not limited to the illustrated examples, and can be changed as appropriate. Further, the connecting member is not limited to an anchor ruler capable of positioning the anchor bolt with respect to the formwork 10, and is another plate-shaped or rod-shaped member capable of connecting the upper portions of the formwork pairs 11 and 12 to each other. You may. The means for connecting the connecting member to the formwork pair is not limited to the one using the pin member 17, and for example, a fastening member such as a bolt, a nut, or a clamp may be used, or a hook fixed by hooking on the formwork pair. Etc. may be provided on the connecting member.

The anchor ruler 30 is arranged so that the hole 32 of the anchor ruler 30 overlaps the hole 16 of the formwork 10, and is pinned so as to penetrate the hole 32 of the overlapping anchor ruler 30 and the hole 16 of the formwork 10. By inserting the member 17 or the like, the anchor ruler 30 can be fixed to the upper part of the formwork 10. More specifically, for example, as shown in FIG. 1, the anchor ruler 30 overlaps in a state where the anchor ruler 30 is arranged so that the four holes 32 of the anchor ruler 30 overlap each of the four holes 16 of the first formwork pair 11. The anchor ruler 30 can be fixed to the first formwork pair 11 by inserting the pin member 17 into the plurality of holes 16 and 32, respectively. Similarly, by arranging the anchor ruler 30 so that the other four holes 32 of the anchor ruler 30 overlap the four holes 16 of the second formwork pair 12, and inserting the four pin members 17, the second mold The anchor ruler 30 can be fixed to the frame pair 12. In this way, the upper portions of the first formwork pair 11 and the second formwork pair 12 can be connected to each other by the anchor ruler 30. The anchor bolts may be positioned with respect to the formwork 10 (first formwork pair 11 and second formwork pair 12) by using the support hole 33 of the anchor ruler 30 as a connecting member.

The anchor ruler 30 as a connecting member shown in FIG. 1 is located on the upper part of the first formwork pair 11 and the second formwork pair 12 at a position orthogonal to the first formwork pair 11 and the second formwork pair 12. It is fixed. In the anchor ruler 30 shown in FIG. 1, one end (the end on the reference point P1 side) of the anchor ruler 30 in the longitudinal direction is fixed to the first formwork pair 11, and the other end (the end on the reference point P4 side). Is fixed to the second formwork pair 12. The intermediate portion of the anchor ruler 30 in the longitudinal direction may be fixed to the first formwork pair 11 or the second formwork pair 12.

The anchor ruler 30 shall be installed with respect to each formwork pair 11, 12, 13 at a position parallel to the extending direction of each formwork pair 11, 12, 13 or at a position orthogonal to the extending direction. Is configured to allow

FIG. 3 shows a vertical cross section of the formwork 10 and the anchor ruler 30 cut in a vertical plane along the extending direction of the anchor ruler 30 through the center of the hole 32 of the anchor ruler 30 into which the pin member 17 is inserted. It is a figure.

As shown in FIGS. 1 and 3, in the foundation construction method of the present embodiment, the upper parts of the first formwork pair 11 and the second formwork pair 12 are placed on each other, and the first formwork pair 11 and the second formwork pair 12 are placed. It includes a step of placing concrete in a state of being connected by an anchor ruler 30 (connecting member) orthogonal to the anchor ruler 30 (connecting member). In the anchor ruler 30, the first formwork pair 11 and the second formwork pair 12 are not connected to each other by another formwork pair such as the third formwork pair 13. 11 and the second formwork pair 12 are connected. Before the step of placing concrete, a step of installing the formwork 10 on the ground together with reinforcing bars and the like and a step of installing a connecting member (anchor ruler 30 in this example) on the formwork 10 are included.

As shown in FIG. 3, the solid foundation 60 constructed by placing concrete in the formwork 10 has a foundation slab 61 that covers the ground and a foundation rising portion 62 that projects upward in the vertical direction from the foundation slab 61. .. The foundation rising portion 62 has an outer peripheral rising portion 62a formed by the first formwork pair 11 and an inner rising portion 62b formed by the second formwork pair 12.

As described above, the foundation construction method of the present embodiment is a foundation construction method in which the formwork 10 is installed and concrete is cast, and the formwork 10 is provided on two foundation rising portions 62 parallel to each other. The corresponding first formwork pair 11 and the second formwork pair 12 are provided, and the upper portions of the first formwork pair 11 and the second formwork pair 12 are placed on the first formwork pair 11 and the second formwork pair 12 The anchor ruler 30 includes a step of placing concrete in a state of being connected by a connecting member such as an anchor ruler 30 orthogonal to the anchor ruler 30, and the first formwork pair 11 and the second formwork pair 12 are other formwork. It is characterized in that the first formwork pair 11 and the second formwork pair 12 are connected at positions that are not connected to each other by a pair.

In the method of constructing the foundation of the present embodiment, concrete is simply connected by connecting the upper portions of the parallel first formwork pair 11 and the second formwork pair 12 with a connecting member such as an anchor ruler 30. In the step of placing the concrete, the distance between the first formwork pair 11 and the second formwork pair 12 can be appropriately maintained from the time the concrete is poured until the concrete is solidified. As a result, the position and shape of the foundation 60 can be secured with high accuracy. Further, in the present embodiment, the connecting member such as the anchor ruler 30 that maintains the posture of the formwork 10 can be installed so as not to protrude to the outdoor side from the outermost circumference of the formwork 10. , It is more effective when the foundation 60 is close to the land boundary line. That is, as compared with the case where the formwork 10 is supported from the outdoor side by a support member or the like installed on the outdoor side of the formwork 10, the posture of the formwork 10 can be maintained in a narrow range and the quality of the foundation can be ensured. ..

As described above, according to the foundation construction method of the present embodiment, the quality of the foundation can be easily and highly accurately ensured.

In the foundation construction method of the present embodiment, an anchor ruler 30 capable of positioning anchor bolts with respect to the formwork 10 is used as a connecting member. With such a configuration, a dedicated connecting member for connecting the first formwork pair 11 and the second formwork pair 12 becomes unnecessary, so that the construction cost can be reduced.

Further, in the method of constructing the foundation of the present embodiment, a plurality of anchor rulers 30, 40, 50 are installed on the formwork 10, and some of the anchors of the plurality of anchor rulers 30, 40, 50 are anchored. The rulers 40 and 50 are used for positioning the anchor bolts, and some other anchor rulers 30 are used as connecting members. In this way, by using the anchor ruler 30 that can be used for positioning the anchor bolts as the connecting member, the work is not complicated because the connecting member does not need to be managed individually, and the work efficiency of the construction is also improved. Can be done.

Further, in the method of constructing the foundation of the present embodiment, the formwork 10 is arranged so that the cores of the foundation (foundation rising portion 62) are spaced apart from each other corresponding to the predetermined module dimensions, and the connecting members are predetermined. Anchor ruler 30 corresponding to the module size of the above, and the anchor ruler 30 is placed on the upper part of the first formwork pair 11 and the second formwork pair 12 by inserting a pin member 17 into the formwork 10 and the anchor ruler 30, respectively. Holes 16 and 32 that can be fixed are provided, and when the anchor ruler 30 is fixed to the upper parts of the first formwork pair 11 and the second formwork pair 12 using the pin member 17, the first formwork pair 11 and the first formwork pair 11 are fixed. The two formwork pairs 12 are configured to be positioned at intervals corresponding to the predetermined module dimensions. With such a configuration, the positions of the first formwork pair 11 and the second formwork pair 12 are stable, so that the quality of the foundation can be ensured with higher accuracy. Further, since the alignment and fixing work of the anchor ruler 30 with respect to the formwork 10 becomes easier, the construction efficiency can be further improved.

Further, in the method of constructing the foundation of the present embodiment, the foundation is a solid foundation 60, and in the process of placing concrete, the foundation slab 61 of the solid foundation 60 and the foundation rising portion 62 are not joined. It is preferable to cast concrete (integral casting). With such a configuration, the cost construction period can be shortened and the cost can be reduced as compared with the case of double hitting.

Further, when at least one of the formwork pairs connected by the connecting member corresponds to the outer peripheral rising portion 62a of the solid foundation 60 as in the first formwork pair 11 of this example, it is particularly on the outdoor side. Since a large pressure is applied to the outer formwork component 11a and displacement is likely to occur, the method of constructing a foundation that connects the upper parts of the formwork pair with a connecting member as in the present embodiment is effective. In that case, it is preferable to fix the connecting member to at least the outer formworking part 11a on the outdoor side of the pair of formworking parts 11a and 11b forming the first formwork pair 11. With such a configuration, the quality of the foundation can be ensured with higher accuracy. More preferably, as shown in FIGS. 1 and 3, it is desirable to fix the connecting member to both of the pair of formwork components 11a and 11b of the first formwork pair 11. With such a configuration, the distance between the pair of formwork components 11a and 11b can be easily maintained, so that the quality of the foundation can be ensured with higher accuracy. From the same viewpoint, it is desirable to fix the connecting member to both of the pair of formwork components 12a and 12a of the second formwork pair 12. The connecting member may be fixed only to one of the formwork components (11a, 11b, 12a) of the pair of formwork components (11a, 11b, 12a) constituting the formwork pairs 11 and 12.

The present invention is not limited to the configuration of the above-described embodiment, and can be realized by various configurations without departing from the contents described in the claims. For example, in the above embodiment, the anchor ruler 40 as a positioning member for anchor bolts is arranged between the anchor ruler 30 as a connecting member and the first formwork pair 11, but the anchor ruler 40 is not limited to this. May be placed above the anchor ruler 30. Alternatively, the anchor ruler 40 may be arranged so as not to overlap with the anchor ruler 30, or the anchor ruler 40 may be omitted. Similarly, the position of the anchor ruler 40 located between the anchor ruler 30 and the second formwork pair 12 can be changed as appropriate, and can be omitted. Further, the position of the anchor ruler 50 arranged above the third formwork pair 13 can be changed, and may be arranged above the anchor ruler 40 as shown in FIG. 1, or the anchor ruler 40 may be arranged above the anchor ruler 40. It may be placed below. Further, the anchor ruler 50 may be omitted.

Further, for example, another formwork pair that does not connect the first formwork pair 11 and the second formwork pair 12 may be arranged below the anchor ruler 30 as the connecting member shown in FIG. Further, in the above embodiment, two parallel formwork pairs 11 and 12 are connected by a connecting member, but three or more parallel formwork pairs are collectively connected by a connecting member such as an anchor ruler 30. You may do so. Further, in this example, only one anchor ruler 30 as a connecting member is shown, but a plurality of connecting members connecting the first formwork pair 11 and the second formwork pair 12 are connected to the first formwork. They may be spaced apart from each other along the extending direction of the pair 11 and the second formwork pair 12.

Further, in order to more reliably suppress the displacement of the formwork 10 in the concrete placing process, for example, the formwork 10 is provided by using a stretchable support member or the like that extends diagonally from the upper part of the formwork 10 to the installation surface. It may be supported from the outdoor side. Similarly, by fixing a linear pipe member or the like arranged so as to surround the outer peripheral portion of the mold 10 to the outer peripheral portion of the mold 10, the displacement suppressing effect of the mold 10 may be enhanced.

Further, the method of constructing the foundation of the present invention is particularly effective for the construction of the solid foundation 60, but is not limited to this, and can be applied to, for example, the construction of a cloth foundation. Further, the method of constructing the foundation of the present invention is particularly effective in the case of one-piece casting in which concrete is cast without joining the foundation slab 61 of the solid foundation 60 and the foundation rising portion 62, but the present invention is not limited to this. For example, it can be applied to the case of double casting in which the concrete placing step of the foundation slab 61 and the concrete placing step of the foundation rising portion 62 are performed separately.

10: Formwork 11: First formwork pair 11a: Outer formwork component 11b: Inner formwork component 12: Second formwork pair 12a: Inner formwork component 13: Third formwork pair (other molds) Formwork)
15: Upper flange 16: Hole 17: Pin member 30: Anchor ruler (connecting member)
31: Body plate 32: Hole 33: Support hole 34: Confirmation hole 35: Input hole 40, 50: Anchor ruler (anchor bolt positioning member)
60: Foundation 61: Foundation slab 62: Foundation rising part

Claims (7)

It is a foundation construction method in which a formwork is installed and concrete is placed.
The formwork includes a first formwork pair and a second formwork pair corresponding to two parallel rising portions of the foundation, respectively.
A step of placing concrete in a state where the upper portions of the first formwork pair and the second formwork pair are connected by a connecting member orthogonal to the first formwork pair and the second formwork pair. Including
The connecting member connects the first formwork pair and the second formwork pair at a position where the first formwork pair and the second formwork pair are not connected to each other by another formwork pair. A method of constructing a foundation that is characterized by this. The method for constructing a foundation according to claim 1, wherein the connecting member is an anchor ruler capable of positioning anchor bolts with respect to the formwork. A plurality of the anchor rulers are installed in the mold, some of the anchor rulers are used for positioning the anchor bolts, and some of the other anchor rulers are used. The method for constructing a foundation according to claim 2, which is used as the connecting member. The formwork is arranged so that the cores of the foundation are spaced so as to correspond to a predetermined module size.
The connecting member is the anchor ruler corresponding to the predetermined module size.
Each of the formwork and the anchor ruler is provided with a hole capable of fixing the anchor ruler to the upper part of the first formwork pair and the second formwork pair by inserting a pin member.
When the anchor ruler as the connecting member is fixed to the upper part of the first formwork pair and the second formwork pair by using the pin member, the first formwork pair and the second formwork pair The method of constructing a foundation according to claim 2 or 3, wherein is configured to be positioned at intervals corresponding to the predetermined module dimensions. The foundation is a solid foundation
The method for constructing a foundation according to any one of claims 1 to 4, wherein in the step of placing concrete, concrete is placed without connecting the foundation slab of the solid foundation and the rising portion of the foundation. The method for constructing a foundation according to claim 5, wherein at least one of the first formwork pair and the second formwork pair corresponds to an outer peripheral rising portion located on the outer peripheral portion of the solid foundation. It is a foundation formed by installing a formwork and placing concrete.
The formwork includes a first formwork pair and a second formwork pair corresponding to two parallel rising portions of the foundation, respectively.
Concrete is cast in a state where the upper portions of the first formwork pair and the second formwork pair are connected by a connecting member orthogonal to the first formwork pair and the second formwork pair.
The connecting member connects the first formwork pair and the second formwork pair at a position where the first formwork pair and the second formwork pair are not connected to each other by another formwork pair. The basis that is characterized by that.

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