JP6837243B2 - Formwork structure for stationary foundations, stationary foundations using them, and their installation methods - Google Patents

Description

The present invention relates to a formwork structure of a foundation that does not require the formwork to be assembled at the installation site of the foundation, and more particularly to a formwork structure that can be carried and installed from another place.

Conventionally, when a structure is installed, a foundation is formed of concrete or the like at a place where the structure is installed at the installation site, and the structure is installed on the foundation. When forming the foundation, a formwork is assembled at the installation site, concrete is cast in the formwork and hardened, and then the formwork is removed to complete the foundation. For this reason, it takes time and effort to assemble the formwork every time the foundation is formed, and skill is also required. In addition, there is a problem that the construction period cannot be accurately determined because the period for hardening the concrete at the installation site becomes long and it depends on the weather.

In view of such a problem, an invention has been proposed in which the installation work at the installation site can be simplified and the construction period in the installation work can be easily set (Patent Document 1).

Japanese Unexamined Patent Publication No. 9-70188

However, in the invention described in Patent Document 1, since it is only necessary to transport the prefabricated foundation to the installation site and place it at the installation site, it is not necessary to manufacture the formwork at the installation site. No studies or ingenuity have been made regarding the ease of manufacture, performance, and strength when manufacturing a transportable foundation at a factory or the like. In other words, various issues that arise when developing technology from the foundation to be built to the foundation to be placed have not been sufficiently examined and solved.

The present invention has been made to solve such a problem, and can easily manufacture a transportable foundation without requiring skill, and has a strength capable of preventing distortion due to concrete placement. It is an object of the present invention to provide a formwork structure for an installation type foundation that can be used by a small number of people and can construct a foundation in a short period of time, an installation type foundation using the formwork structure, and an installation method thereof.

The formwork structure according to the present invention can be easily manufactured without the need for skill, and is carried and installed from another place in order to solve the problem of preventing distortion when concrete is placed. A formwork structure for a possible installation type foundation, which is horizontally formed by a formwork portion formed in a frame shape according to the outer peripheral shape of the installation type foundation and a plurality of reinforcing bars inside the formwork portion. A predetermined of a plurality of formwork materials constituting the formwork portion, an anchor bolt portion provided by projecting an anchor bolt vertically upward from between the foundation reinforcing bar portion provided in an intersecting shape and the foundation reinforcing bar portion. It has a distortion prevention member that prevents the formwork members from being distorted during concrete placement by connecting the formwork members at opposite positions.

Further, as one aspect of the present invention, in order to solve the problem of reliably supporting the anchor bolts for connecting the structures installed on the foundation in a vertical shape, the anchor bolt portion has the anchor bolts in a vertical shape. It is preferable that the anchor support member is provided to support the anchor support member, and the anchor support member is joined to the distortion prevention member.

Further, as one aspect of the present invention, in order to solve the problem of efficiently preventing distortion when manufacturing a transportable foundation having a substantially rectangular shape in a plan view, the mold portion is substantially formed in a plan view. By joining a pair of short-sided frame members formed in the shape of a figure and a pair of long-sided frame members formed in a straight line in a plan view, it is formed into a substantially rectangular shape in a plan view. , The long side frame members may be connected to each other by a plurality of the distortion prevention members.

Further, as one aspect of the present invention, in order to solve the problem of preventing injury due to a sharp portion during manufacturing of a stationary foundation or installation at a site, the short side frame material and the upper end side portion of the long side frame material are formed. It is preferable that it is bent diagonally upward in the inward direction to form a safe upper end side portion.

Further, the stationary foundation according to the present invention is claimed in order to solve the problem that it can be easily manufactured without requiring skill, distortion when concrete is placed, and can be easily and safely transported. It is constructed by placing concrete inside the formwork structure according to any one of claims 1 to 4.

Further, the installation method of the installation type foundation according to the present invention does not require skill level, and in order to solve the problem of constructing the foundation with a small number of people and in a short period of time, any one of claims 1 to 4 is applied. Concrete is cast inside the formwork structure described and hardened to manufacture a stationary foundation in advance, a place where the foundation is to be installed is excavated, gravel is thrown in and compacted, and then the stationary foundation is described. It is characterized in that it is transported and installed, and the surroundings of the installation type foundation are backfilled.

In addition, the installation method of the stationary foundation according to the present invention does not require skill, and in order to solve the problem of constructing the foundation with a small number of people in a short period of time, a place where the foundation is to be installed is excavated. After the gravel is thrown in and compacted, the formwork structure according to any one of claims 1 to 4 is installed, the surroundings of the formwork structure are backfilled, and then concrete is cast inside the formwork structure. It is characterized by being installed.

According to the present invention, a transportable foundation can be easily manufactured without requiring skill, has strength that can prevent distortion due to concrete placing, and can be constructed by a small number of people in a short period of time. it can.

It is a top view which shows the embodiment of the formwork structure of the stationary foundation which concerns on this invention. It is a bottom view of FIG. 1 which shows the formwork structure of this embodiment. It is a front view of FIG. 1 which shows the formwork structure of this embodiment. FIG. 1 is a cross-sectional view taken along the line AA of FIG. FIG. 1 is an enlarged cross-sectional view taken along the line BB of FIG. It is a perspective image which arranged the foundation reinforcing bar part in the formwork structure of this embodiment. It is a perspective image which shows the stationary foundation which concerns on this invention. It is a schematic diagram which shows the use state which installed the gantry on the stationary foundation which concerns on this invention.

Hereinafter, the formwork structure of the installation type foundation according to the present invention, the installation type foundation using the formwork structure, and the embodiment of the installation method thereof will be described with reference to the drawings.

As shown in FIGS. 1 to 6, the formwork structure 1 of the present embodiment mainly includes a formwork portion 2 formed in a frame shape according to the outer peripheral shape of the installation type foundation 10, and the formwork portion 2. A foundation reinforcing bar portion 3 provided in a horizontal crossing shape by a plurality of reinforcing bars 31 inside the portion 2, and an anchor bolt portion 4 provided by projecting an anchor bolt 41 vertically upward from between the foundation reinforcing bars 3 Of the plurality of formwork members constituting the formwork portion 2, the formwork members 5 at predetermined facing positions are connected to each other to prevent the formwork members from being distorted during concrete casting. Have. Hereinafter, each of these configurations will be described in more detail.

The mold portion 2 is formed in a frame shape according to the outer peripheral shape of the stationary foundation 10, and in the present embodiment, as shown in FIGS. 1 to 4, it is formed in a substantially U shape in a plan view. By joining the pair of short side frame members 21 and 21 and the pair of long side frame members 22 and 22 formed linearly in a plan view, the shape is substantially rectangular in a plan view. .. The short side frame material 21 and the long side frame material 22 are each formed by bending a long metal flat plate. Further, the joint portion between the short side frame member 21 and the long side frame member 22 is not welded from the viewpoint of corrosion resistance, but is joined by bolts or screws via the joint plate 23 as shown in FIG. Further, the upper end side portion 24 of the short side frame member 21 and the long side frame member 22 is formed as an upper end side portion 24 whose safety is enhanced so as to be bent diagonally upward in the inward direction to exhibit an inclined surface shape. Has been done.

The formwork portion 2 in the present embodiment is formed in a substantially rectangular shape in a plan view, but is not limited to this, and is installed on an installation type foundation 10 having a circular shape or an elliptical shape in a plan view. It may be changed as appropriate according to the shape and weight of the structure to be formed. Further, depending on the rectangular length, the long side frame member 22 may be formed in a U shape instead of the short side frame member 21.

As shown in FIG. 6, the foundation reinforcing bar portion 3 is composed of a plurality of reinforcing bars 31 provided in a horizontal cross shape inside the formwork portion 2. Since these reinforcing bars 31 constitute the reinforcing bars 31 of the reinforced concrete constituting the foundation, appropriate intervals are provided inside the formwork portion 2 and on the upper side so as to ensure the strength thereof. A large number of them are arranged so as to form a mesh of meshes separated by each other.

As shown in FIGS. 1 to 6, the anchor bolt portion 4 is for providing the anchor bolt 41 so as to project vertically upward from between the foundation reinforcing bar portions 3. The anchor bolt portion 4 of the present embodiment has an anchor support member 42 having a substantially rectangular frame shape in a plan view, and bolt insertion holes 43 are formed at four corners of the anchor support member 42, respectively. Anchor bolts 41 having a predetermined length are inserted into these bolt insertion holes 43 and fixed with nuts 44. Since the anchor bolts 41 connect and fix the structures installed on the foundation, the number of anchor bolts 41 and the arrangement locations are determined according to the structures. In the present embodiment, one is arranged at each of the inner positions of both ends in the longitudinal direction of the form part 2. Further, since the anchor support member 42 is joined to the strain prevention member 5 described later, the anchor bolt 41 can be reliably supported vertically upward.

The distortion prevention member 5 prevents the formwork material from being distorted at the time of concrete casting by connecting the formwork materials at predetermined facing positions among the plurality of formwork materials constituting the formwork portion 2. Is. In the present embodiment, since the short side frame material 21 of the form part 2 is formed in a substantially U shape, it is difficult to distort, and it is easy to distort on the long side frame material 22 side. Therefore, the long side frame material 22 is easily distorted. They are connected to each other by a plurality of distortion prevention members 5. Specifically, three substantially L-shaped strain-preventing members 5a arranged on the center side and four (pair of each) flat plates that have a strain-preventing function while joining the anchor support member 42. It has a distortion prevention member 5b.

Regarding the formwork structure 1 of the stationary foundation 10 of the present embodiment as described above, the effects exerted together with the actions of each configuration will be described.

1. 1. Since the formwork structure 1 of the present embodiment can complete the foundation by placing concrete, it is not necessary to assemble or remove the formwork at the installation site, and the foundation can be easily manufactured without the need for skill.
2. 2. Since the distortion prevention member 5 connects the formwork members at opposite positions, it is possible to prevent distortion when concrete is placed. In particular, in the substantially rectangular form part 2, the long side frame material 22 is easily distorted and deformed by casting, but the strain preventing member 5 connects the long side frame materials 22 to each other to effectively prevent the strain deformation. Can be done.
3. 3. Since the anchor support member 42 that supports the anchor bolt 41 is joined to the distortion prevention member 5, the anchor bolt 41 can be reliably supported vertically, and the structure can be installed more accurately on the foundation. Can be done.
4. Since the upper end side portions 24 of the short side frame material 21 and the long side frame material 22 are each bent diagonally upward in the inward direction to form a safe upper end side portion 24, the installation type foundation 10 is installed at the time of manufacturing or on-site installation. It is possible to prevent the sharp portion of the mold portion 2 from being injured at times.

Next, an embodiment of the stationary foundation 10 according to the present invention will be described.

As shown in FIG. 7, the installation type foundation 10 of the present embodiment is in a state in which concrete is cast up to the upper end side portion 24 inside the formwork portion 2 in the formwork structure 1 described above, and the anchor bolts 41 are projected. Manufactured by curing in. Then, as shown in FIG. 8, the installation type foundation 10 is transported to the installation location, and a structure such as a gantry is arranged on the foundation and fixed by connecting with each anchor bolt 41.

According to the installation type foundation 10 of the present embodiment as described above, concrete is placed in a place different from the installation place, such as a place away from the installation site such as a factory or a place near the installation site where concrete can be easily placed. Can be manufactured. However, the present invention is not limited to such manufacturing, and may be used, for example, by transporting the formwork structure 1 to the installation location, arranging the formwork structure 1, backfilling the surrounding area, and then placing concrete at the site. .. In addition, since it is not necessary to assemble or remove the formwork at the installation site, the construction period is shortened.

Next, an embodiment of the installation method of the installation type foundation 10 according to the present invention will be described.

In the installation method of the installation type foundation 10 of the present embodiment, first, concrete is cast inside the formwork structure 1 described above at a place different from the installation place of the foundation such as a factory and hardened to perform the installation type foundation. 10 is manufactured. On the other hand, at the installation site, after excavating the place where the foundation will be installed and leveling the floor, gravel is thrown in and compacted to make the foundation ready for installation. The installation of the foundation is completed by separately carrying the manufactured installation type foundation 10 to this installation location and backfilling the periphery of the installation type foundation 10 after installation.

The formwork structure 1 is not limited to the above-mentioned installation method. For example, the formwork structure 1 is installed after gravel is thrown in and compacted at the installation site, and the surroundings thereof are backfilled. Concrete may be cast inside the formwork portion 2 and hardened to complete the stationary foundation 10.

According to the installation method of the installation type foundation 10 of the present embodiment as described above, it is not necessary to assemble and remove the foundation frame material in advance at the installation site, and it is possible to construct the foundation with a small number of people in a short period of time. it can. It also makes it easier to schedule an accurate construction period. Further, since the formwork structure 1 which is safe and has high strength can be used as a foundation as it is, a highly durable foundation can be installed.

The present invention is not limited to the above-described embodiment, and can be appropriately modified. For example, the shape of the formwork portion 2, the number of foundation reinforcing bars 3, the arrangement location of the anchor bolt portion 4, the connection location and number of the strain prevention members 5, etc. can be appropriately changed according to the foundation and structure to be installed. Is. In addition, the place where concrete is placed in the formwork structure 1 can be appropriately selected and changed according to the situation at the site and the construction period.

1 Formwork structure 2 Formwork part 3 Foundation rebar part 4 Anchor bolt part 5 Distortion prevention member 5a Approximately L-shaped distortion prevention member 5b Flat plate distortion prevention member 10 Installation type foundation 21 Short side frame material 22 Long side frame Material 23 Joint plate 24 Upper end side 31 Reinforcing bar 41 Anchor bolt 42 Anchor support member 43 Bolt insertion hole 44 Nut

Claims (6)

A formwork structure for stationary foundations that can be carried and installed from other locations.
A formwork portion formed in a frame shape according to the outer peripheral shape of the installation type foundation,
A foundation reinforcing bar portion provided horizontally intersecting with a plurality of reinforcing bars inside the formwork portion, and
Anchor bolts provided by projecting anchor bolts vertically upward from between the foundation reinforcing bars,
Possess a distortion preventing member for preventing the said form member is distorted in the concrete after casting by connecting form members with each other at a predetermined position opposite of the plurality of form members constituting the molding part ,
A formwork structure for an installation type foundation in which the upper end side portion of the formwork material is bent diagonally upward in the inward direction to form a safe upper end side portion. The stationary foundation according to claim 1, wherein the anchor bolt portion has an anchor support member for vertically supporting the anchor bolt, and the anchor support member is joined to the distortion prevention member. Formwork structure. The formwork portion is flat by joining a pair of short side frame members formed in a substantially U shape in a plan view and a pair of long side frame members formed in a straight line in a plan view. The formwork structure for an installation type foundation according to claim 1 or 2, wherein the long side frame members are connected to each other by a plurality of the distortion prevention members while being visually formed in a substantially rectangular shape. .. An installation type foundation formed by placing concrete inside the formwork structure according to any one of claims 1 to 3. Concrete is cast inside the formwork structure according to any one of claims 1 to 3 and hardened to manufacture a stationary foundation in advance, a place where the foundation is to be installed is excavated, and gravel is put in. A method of installing an installation type foundation, which comprises transporting and installing the installation type foundation and backfilling the surroundings of the installation type foundation after rolling. After excavating the place where the foundation is to be installed, adding gravel and rolling, the formwork structure according to any one of claims 1 to 3 is installed, and the surroundings of the formwork structure are laid. A method of installing a stationary foundation, which is characterized by placing concrete inside the backfill after backfilling.