JP4312658B2 - Foundation frame and foundation formation method - Google Patents

Description

  The present invention relates to a foundation frame that can be used as a foundation for, for example, a machine in a clean room. More specifically, the present invention is laid on a highly rigid substrate (for example, highly rigid joists arranged in parallel at intervals). Thus, the present invention relates to a foundation frame composed of a high-rigidity frame main body having a flat polygonal shape capable of forming a foundation for installation of heavy equipment such as mechanical equipment and tanks that do not like vibration, and a foundation formation method using the foundation frame.

This type of foundation pedestal can be widely used for structures that involve rearrangement of foundations. Among them, the background art will be described with a clean room as an example having special circumstances.
In the first place, in order to manufacture high-quality semiconductors and the like in a clean room, it is necessary to provide an installation environment in which high cleanliness of air is required and the precision instruments used can be stably operated.
As the structure for ensuring the former air cleanliness, a part of the circulation system of the clean air is often provided so as to penetrate the floor surface up and down, and in this case, on the joists placed side by side at intervals. A ventilation floor material (for example, a floating floor panel such as a so-called free access floor panel provided with ventilation holes) is installed to ensure ventilation of the upper and lower spaces through the space between the joists.
As a structure that enables stable installation of the latter devices, the foundation frame that is the basis of the devices and the joists that receive the foundation frame are formed more accurately, and high rigidity is obtained so that they are less susceptible to the adverse effects of vibration. It is adopted that it is formed as described. Of course, the installation work of the foundation frame on the base is also carried out so as to ensure high accuracy.
In addition to these conditions, the layout of each precision instrument and the like may be changed in the clean room, and it is necessary to meet the request. Therefore, as an example, the floor is a fixed floor panel (a floating floor panel such as a so-called free access floor panel) that can easily assemble, install, dismantle and move the plurality of floor materials described above. The floor panels are configured so as to be detachably arranged on the respective support legs standing at predetermined positions on the base.
As one of the conventional foundation mounts that have been implemented in such a technical background, there was one that was formed by placing concrete on the base and directly placing the concrete. With the above-described change in the layout of the devices, there is a drawback that it takes much time to remove the foundation frame or to newly install the foundation frame at another position. Furthermore, when removing the foundation cradle, the concrete is crushed and dismantled, so there is a risk that dust will be generated and the cleanliness of the air will be reduced. ing.
As one of the foundation mounts that can solve these problems, the planar shape of the foundation mount is formed in a rectangular shape according to the floor panel, and each of these foundation mounts is placed on the joists. There was a thing that said to support (for example, refer patent document 1, 2).
According to such a conventional foundation frame, when removing the foundation frame in accordance with the layout change of the equipment, it can be removed in units of compactly formed foundation frames, compared to the previous conventional example Removal work can be carried out without much effort. In addition, when newly installing a foundation platform on a part of the floating floor, remove the floor panel in the corresponding area and lay each foundation platform in a state in which a space for installing the foundation platform is secured in that part. To be implemented.

JP 2003-64819 A (FIG. 1) JP 2002-309761 A

According to the above-mentioned conventional foundation frame, there is a problem that the former one takes time for installation and removal work as described above. The latter also has the following problems.
That is, in changing the layout of the foundation frame, naturally, the layout change of the floor panel is also performed in parallel, but the support legs of the floor panel are often shown in FIG. Since each corner portion of the four floor panels 2 is supported by one support leg 3, one of the floor panels 2 is removed as shown in FIG. A part of the support leg 3 is located in the space. However, in order to provide the foundation frame with high rigidity, the thickness dimension is extremely large as compared with the floor panel. To install the foundation frame on the floor panel removal site, a part of the support leg 3 is used. Interferes and becomes an obstacle.
Therefore, even if it is a change of the layout of the foundation frame, in the installation process of installing the foundation frame in a part of the place where the floor panel is installed, the support leg 3 is newly added as shown in FIG. It is necessary to turn the surrounding floor panel 2 once as a work for adding to or shifting to the outside, or as a preparation work for the work, and as a result, there is a problem that it takes time to change the layout. there were.
In addition, such a problem similarly occurs in the removal process in which the floor panel is installed on the trace of the foundation frame removed. That is, when the foundation frame is removed, as shown in FIG. 7B, the support legs 3 do not exist in the removal trace space, so it is necessary to position the support legs 3 in the removal trace space. Regarding the installation of the support legs 3, as shown in FIG. 7 (c), a method of newly installing the support legs 3 in the removal trace space, a method of performing the reverse procedure of the above-described foundation frame installation process, That is, after turning around the surrounding floor panels 2 and re-installing the supporting legs 3 so that a part of them is located in the removal trace space (see FIG. 7 (a)), each floor panel 2 is There is a method of installation, and it is necessary to take a laborious process in any method.

  Accordingly, an object of the present invention is to solve the above-mentioned problems and provide a foundation frame and a foundation forming method capable of easily changing the layout even in a floor structure in which a floating floor panel and a foundation frame are mixed. It is in.

A first characteristic configuration of the present invention is a foundation gantry composed of a high-rigidity gantry main body having a plane polygon shape that can form a foundation for installation of mechanical equipment by laying and laying it on a rigorous foundation. In addition to providing a load transmitting portion that directly transmits a load, the support legs for supporting the floating floor installed on the ground are not interfered with the side ridge portions located at the respective corners in plan view of the gantry body. Ri Oh and notch capable of position provided, wherein the frame with the installation of the main body, positioning means positionable relative to said supporting leg position and placed on the base of the pedestal body, wherein in Rutokoro it provided at the corner portions due to the plan view of the gantry body.

According to the first characteristic configuration of the present invention, the high-rigidity gantry body can be directly supported on the high-rigidity base via the load transmitting unit, and the mechanical equipment to be supported is more stable. In addition to being able to support the floor, even if the support legs for supporting the floating floor are installed on the ground, a positional relationship is adopted such that the support legs are located in the notches of the gantry body. It is possible to perform a series of operations for moving the support legs as in the past, or to install (or remove) the base frame at a predetermined position without newly adding support legs. It becomes possible, and the installation (or removal) work of the foundation frame can be performed efficiently.
Therefore, even with a floor structure in which a floating floor panel and a foundation frame are mixed, the layout can be easily changed.

Furthermore, prior Symbol by using the support legs of the installed floating floor supporting on the base can be positioned in the frame body by the positioning means, align the basic frame so that a series arrangement state and floating floor installation It becomes possible to do. Therefore, it is possible to more efficiently carry out the installation work of the foundation frame. In addition, the positioning mentioned here means either one or both of positioning in the height direction of the gantry body with respect to the support legs, positioning in a plane, and the like.

According to a second characteristic configuration of the present invention, the positioning means is formed of a cylindrical portion that can be fitted onto the floating floor fixing female screw portion formed in a protruding state on the upper surface of the support leg. .

According to the second characteristic configuration of the present invention, in addition to achieving the above-described operation and effect of the first characteristic configuration of the present invention, the cylindrical portion is positioned on the female screw portion protruding on the support leg. By simply placing and placing the foundation frame, the tube part fits into the female screw part, and the horizontal frame can be easily positioned by guiding the foundation frame to a predetermined position on the support leg. This makes it possible to carry out the installation work of the foundation frame more efficiently.

According to a third characteristic configuration of the present invention, a flat placing portion that can be placed on the support leg installed on the base is integrally provided above the notch portion of the gantry body, and A height adjusting means capable of adjusting the installation height of the flat mounting portion is provided in the flat mounting portion.

According to the third characteristic configuration of the present invention, in addition to being able to achieve the above-described operational effect according to the first or second characteristic configuration of the present invention, in a state of being supported by the support leg by the height adjusting means. The height of the foundation gantry can be adjusted as it is, and for example, it can be easily implemented that the heights of the adjacent gantry gantry and the floating floor are aligned.

According to a fourth characteristic configuration of the present invention, the height adjusting means is constituted by a bolt attached to the flat mounting portion so as to be freely retractable downward, and the bolt is provided on the support leg. The length is such that the tip can be brought into contact with the bottom surface in the female screw portion, and the outer diameter is formed so as to be freely fitted in the inner space of the female screw portion of the support leg.

According to the fourth characteristic configuration of the present invention, in addition to achieving the above-described operation and effect of the third characteristic configuration of the present invention, the support can be performed with a simple operation of simply screwing the bolt. The height of the foundation gantry can be adjusted while securing the supporting reaction force on the bottom surface in the female screw portion of the leg, and each foundation gantry can be installed so as to have a floor surface with less unevenness.
In addition, since the bolt is formed to have an outer diameter that can be freely fitted in the inner space of the female screw portion of the support leg, the male screw of the bolt is prevented from interfering with the female screw of the female screw portion. can do. That is, it is possible to prevent the female screw from being damaged when the height of the foundation frame using the bolt is adjusted. Since the female screw of the support leg is formed on the assumption that a relatively lightweight floating floor panel is fixed, the strength is low, and if the thread breaks, it is necessary to replace the foundation frame and attach the floating floor panel next. There is a risk that the screw will not work when it occurs.
As described above, according to the characteristic configuration of the present invention, it is possible to overcome the problem that the screw thread is easily damaged when supporting the heavy-weight foundation frame while using the support legs for the floating floor.

According to a fifth characteristic configuration of the present invention, the load transmitting unit is configured to apply a non-shrinkable solidifying material in a gap between the base and the gantry body in a state where the gantry body is set at an appropriate position on the support leg. It is in a place where it is filled and consolidated.

According to the fifth characteristic configuration of the present invention, in addition to being able to achieve the above-described operation and effect by the characteristic configuration according to any one of the first to fourth aspects of the present invention, the gantry body is positioned by the support leg. The gantry body can be fixed to the base using the non-shrinkable solidifying material while maintaining the state. Therefore, it becomes possible to install the foundation frame in a more accurate position state.

A sixth characteristic configuration of the present invention is that a through-hole capable of filling the non-shrinkable solidified material from above into the load transmitting portion is formed in the gantry body.

According to the sixth characteristic configuration of the present invention, in addition to being able to achieve the above-described operational effect according to the fifth characteristic configuration of the present invention, there is no need to place the gantry body at a predetermined position on the base. The filling operation of the shrinkable solidifying material can be performed from above through the through hole. Therefore, it is possible to spread the non-shrinkable solidified material to every corner of the load transmitting portion by effectively using the weight of the non-shrinkable solidified material filled in the through hole, and in carrying out the filling operation. Even if the work scaffold is not assembled on the lower side of the gantry main body, it can be easily carried out from the top of the gantry main body, and the labor for installing and removing the scaffold can be saved, and the efficiency of the work for forming the load transmitting portion can be improved. That is, it is possible to efficiently form a high-quality load transmission portion.

A seventh characteristic configuration of the present invention is a foundation forming method for forming a foundation by installing the foundation platform according to any one of claims 1 to 6 on a base, and placing and supporting the foundation platform in advance. The base having a plurality of high-rigid joists laid out with a space interval that can be formed is configured, and support legs that can support the foundation frame are installed on the high-rigid joists at intervals in the longitudinal direction of the joists. The base gantry is disposed so as to have a predetermined height on the base and between the support legs, and a non-shrinkable solidifying material is filled between the base and the base gantry. After fixing, the fixing bolt is provided so as to penetrate the foundation frame up and down, and the receiving material hardware is arranged below the lower surface of the adjacent high rigidity joist and fixed. Tighten the bolt by screwing it into the receiving metal The base frame and the highly rigid joist are sandwiched up and down and fixed together.

According to the seventh characteristic configuration of the present invention, the space between the high-rigid joists arranged side by side is achieved while realizing the above-described effects of the foundation frame having any one of the first to sixth characteristic configurations of the present invention . It is possible to effectively use and fix the foundation frame and the highly rigid joist up and down with the fixing bolt penetrated into the space, and a stable foundation can be configured. Moreover, since the foundation frame can be fixed in the stable state as described above without forming bolt holes in the high-rigid joists themselves, for example, cross-sectional defects such as bolt holes cannot be made in the high-rigid joists, preventing strength reduction. it can. Furthermore, even when the arrangement of each foundation gantry is changed, it is possible to change the arrangement of the foundation gantry speedily without the need for repairs because there is no trace of bolt holes or the like on the high rigidity joists.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the parts indicated by the same reference numerals as those described in [Problems to be solved by the invention] indicate the same or equivalent parts.

  FIG. 1 shows a floor set of a clean room in which an embodiment of the basic frame of the present invention (hereinafter simply referred to as a frame) is installed, and high-rigid joists (high-rigidity foundations) arranged in parallel at intervals. An example) A free access floor panel (corresponding to a floating floor panel, hereinafter simply referred to as a floor panel) 2 and a foundation frame are laid down on 1 and mixed.

The joist 1 is configured to exhibit high rigidity with a PC member, and is not shown in the drawing, but includes, for example, a column made of a PC member or a steel frame or a concrete filled square pipe, and a large beam and a small beam. Supported by the main skeleton. And it is laid by the space | interval (600 mm pitch as an example) suitable for the support of the said floor panel 2 employ | adopted as a flooring material of a free access floor (equivalent to a floating floor).
And the clearance gap between each joists 1 can be used as installation space, such as piping, wiring, a duct, etc. which aim at the distribution | circulation of the air on the upper and lower sides of the floor panel 2, and the upper and lower sides of a floor, for example.

Further, on the upper surface of the joist 1, support legs 3 for supporting the floor panel 2 and temporarily supporting the foundation frame are fixed at predetermined intervals in the longitudinal direction.
This support leg 3 is formed of metal or synthetic resin, and as shown in FIG. 3, the base portion 3a fixed on the joist 1 and the central portion of the base portion 3a are erected integrally. The column part 3b and the disk-shaped mounting part 3c which can mount and support the floor panel 2 and the foundation frame at the upper end of the column part 3b are provided.
A length adjusting mechanism using a screw structure is incorporated in the support column portion 3b, and the distance from the base portion 3a to the placement portion 3c can be adjusted.
The mounting portion 3c is provided with four female screw portions 4 for fixing the floor panel 2 in a protruding state on the upper surface thereof (see FIGS. 1 and 2), and the butted corner portions of the four floor panels 2 In FIG. 2, each floor panel can be supported by one support leg 3.
A female screw 4a is formed in the inner space of the female screw part 4 (see FIG. 3), and a floor panel fixing bolt 5 for fixing the floor panel 2 can be screwed together. Moreover, the bottom part 4b of the internal thread part 4 is comprised so that the front-end | tip part of the bolt B for foundation stand height adjustment mentioned later can be supported.

  The floor panel 2 is formed in a square shape in plan view, and as shown in FIGS. 1, 3, and 5, a plurality of vent holes penetrating up and down the floor surface are provided. Also, insertion holes 2a through which the floor panel fixing bolts 5 can be inserted are provided at the four corners of the floor panel. And the recessed part 2b of the shape which can be fitted in the said female screw part 4 of the said support leg 3 is formed in the lower surface of four corners, and when arrange | positioning the floor panel 2 on the support leg 3, the said female screw part The floor panel 2 can be positioned at a predetermined position simply by being arranged so that the recess 2b fits into the 4.

The foundation gantry is composed of a high-rigidity gantry main body 6 having a substantially square shape in a planar shape that can be formed on the joists 1 so as to form a foundation for installation of machine equipment.
In this embodiment, the planar shape of the gantry body 6 is formed to be substantially the same square as the floor panel 2 (see FIG. 1). Specifically, the gantry body 6 includes a top plate portion 6A that forms a floor surface, and a main body portion 6B that is integrally formed below the top plate portion 6A. The top plate portion 6A has a planar shape. Is formed in a square, while the main body 6B is formed in a chamfered shape by forming notches 6a at the four corners of the square.

  The side surface portion of the main body portion 6B and the top plate portion 6A are made of stainless steel plates, and the space surrounded by the stainless steel plates is integrally filled with concrete. Yes.

  The notch size of the notch 6a is set on the premise that the support leg 3 installed on the joist 1 can be positioned without interference. Therefore, the gantry body 6 can be arranged as it is between the support legs 3 installed at predetermined intervals in the vertical and horizontal directions.

  As shown in FIGS. 2 and 4, the gantry body 6 includes four through holes 6 b that penetrate vertically in a portion close to the side, and two through holes 6 c that penetrate vertically in a position on the center side. Is formed.

The former four through-holes 6b are formed so as to be positioned on the joist 1 with the gantry body 6 installed, and after the gantry body 6 is placed on the joist 1, no shrink mortar (non-shrinkable solidification). M can be used to fill the gap S between the joist 1 and the gantry body 6 from above the gantry body (refer to FIG. 4).
However, the setting of the gantry body 6 adopts a method in which a gap S is positively secured between the joist 1 and the gantry body 6 is integrated by a non-shrink mortar M filled in the gap S. The load can be directly transmitted to the joist 1. The filled portion of the non-shrink mortar M corresponds to the load transmitting portion 7 according to the present invention. Prior to filling the non-shrinkable mortar M, the gap S is provided with a damming member 8 for keeping the non-shrinkable mortar M within a predetermined range along the outer periphery of the mortar filling target portion. Is preferred. In the present embodiment, the damming member 8 is formed of a sponge member.

The latter two through-holes 6c are for inserting the base gantry fixing bolts 9, and, as shown in FIG. 4, are inserted into the through-holes 6c through the angle members 10 arranged over the lower surface of the adjacent joists 1. The base body 6 and the joist 1 can be clamped by screwing and tightening the bolts 9, and both can be firmly fixed.
The four through-holes 6b and the two through-holes 6c are both provided with detachable lid members, and the top surface of the gantry body can be configured as a flat surface by attaching the lid. .

Next, the relationship between the support leg 3 and the gantry body 6 will be described.
The top plate portion 6A of the gantry body 6 has a stainless steel plate projecting in a flat state above the notch 6a at the four corners, and in a state where the gantry body 6 is set between the support legs 3 The flat portions (corresponding to flat mounting portions) 6d at the four corners are arranged so as to cover the support legs 3.
As shown in FIG. 6, a cylindrical member 11 (corresponding to a cylindrical portion) 11 that can be externally fitted to the female screw portion 4 of the support leg 3 is integrally attached to the lower surface of the flat portion 6 d. When the tube member 11 is fitted into the female screw portion 4 when being placed on the support leg 3, the gantry body 6 can be positioned within an appropriate range on the placement portion 3c. The said cylinder member 11 is called positioning means. In addition, the height dimension of the said cylinder member 11 is set a little smaller than the regular space | interval dimension of the flat part 6d and the mounting part 3c (refer FIG. 3). This is because, when the installation height of the gantry body 6 is adjusted by the height adjusting means 12 to be described later, if the lower end of the cylindrical member 11 comes into direct contact with the mounting portion 3c, it becomes an obstacle to adjustment. It is formed short.

Next, the height adjusting means 12 will be described.
As shown in FIG. 3, the height adjusting means 12 is composed of a height adjusting bolt B which is attached to the flat portion 6d of the top plate portion 6A so as to be freely retractable downward. The installation height of the flat portion 6d with respect to the leg 3 (in other words, the installation height of the gantry body on the joist 1) can be adjusted. That is, the bolt B is screwed into the female screw hole h formed in the flat portion 6d, and the amount of downward movement can be adjusted by changing the screwing direction of the bolt B. Then, the bolt B has a length dimension that allows the front end to come into contact with the bottom surface 4 b in the female screw portion 4 of the support leg 3 and is loosely fitted in the inner space of the female screw portion 4 of the support leg 3. It is formed with a flexible outer diameter. Therefore, the height of the gantry body 6 does not interfere with the bolt B as the bolt B interferes with the female screw 4a as the screw B is screwed in a state where the tip of the bolt B is in contact with the bottom surface 4b in the female screw portion 4. Adjustments can be made.

  According to the foundation gantry of this embodiment, it is possible to more easily carry out the installation and removal of the gantry body on the joists while maintaining a stable support state of equipment and equipment. Even if the floor structure is a mixture of pedestals, the layout can be easily changed without much effort.

[Another embodiment]
Other embodiments will be described below.

<1> The high-rigidity foundation on which the foundation frame is installed has various structures such as reinforced concrete, steel, steel reinforced concrete, steel pipe concrete, and those with prestressed A structure can be adopted. The high-rigidity base is not limited to the high-rigid joist described in the previous embodiment, and may be, for example, a high-rigidity beam or slab, a high-rigidity foundation, etc. Collectively referred to as a highly rigid substrate. On the other hand, the structure of the foundation is not limited to the structure in which the inner periphery surrounded by the metal plate is filled with concrete. For example, the foundation is filled with mortar instead of concrete, or the entire foundation is made of metal casting. It is also possible to configure.
<2> The positioning means is not limited to the cylindrical portion 11 described in the previous embodiment. For example, the thickness of the flat mounting portion 6d is set larger than that of the previous embodiment, A recess that can be fitted to the female screw portion 4 may be formed. Furthermore, when the recessed part is formed in the support leg side, it can also be set as the positioning means with the convex part formed so that it could fit in the recessed part. In this case, a bolt can be mentioned as an example of a convex part. Further, as a different example, instead of the cylindrical portion, an “L” -shaped hardware extending downward from the flat mounting portion of the gantry body is positioned on the side of the planned position of the female screw portion of the support leg. It is also possible to configure. In short, it may be anything that helps positioning with respect to the support leg.
<3> In the previous embodiment, the height adjusting means is constituted by a height adjusting bolt. However, the height adjusting means may be constituted by a fluid cylinder, a piezoelectric element, or the like instead of the bolt. These are collectively referred to as height adjusting means.
<4> In the previous embodiment, the non-shrinkable solidifying material has been exemplified by the non-shrinkable concrete. However, instead of this, for example, a nonshrinkable mortar, a synthetic resin, or the like can be used. . In the case of a synthetic resin, an epoxy resin is particularly preferable in terms of construction and strength.

  In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry.

An exploded perspective view showing the installation status of the gantry body Plan view showing the installation status of the gantry body Partial cutaway cross-sectional view of the main part showing the support status by the support legs Sectional view of joist axis view showing the installation status of the main body Cross section of the main part showing the installation status of the floor panel Cross-sectional view of the main part showing the mounting status of the gantry body Floor panel layout when changing the layout of the foundation frame

Explanation of symbols

1 joist (an example of a highly rigid substrate)
3 Support leg 4 Female thread part 6 Base body 6a Notch part 6b Through hole 6d Flat part (equivalent to flat mounting part)
7 Load transmitting portion 8 Damping member 9 Foundation mount fixing bolt 10 Angle member 11 Tube member (corresponding to tube portion)
12 Height adjustment means B Foundation mount height adjustment bolt h Female thread hole M Non-shrink mortar (equivalent to non-shrinkable solidified material)
S clearance

Claims (7)

It is a foundation gantry composed of a high-rigidity gantry body with a flat polygonal shape that can form a foundation for machine equipment installation by laying it on a highly rigid substrate,
Provided with a load transmission section that transmits the load directly to the base, and interfered with the support legs for supporting the floating floor installed on the base on the side ridges located at the corners in plan view of the gantry body Ri Oh and notch capable of positioned state provided that no, the frame with the installation of the main body, the positioning means positionable relative to said support leg was installed position of the gantry main body on said base but wherein that provided in the corner portion due to the plan view of the gantry body underlying pedestal. 2. The foundation frame according to claim 1 , wherein the positioning unit is configured by a cylindrical portion that can be fitted onto a floating thread fixing female screw portion formed in a protruding state on the upper surface of the support leg. A flat placement portion that can be placed on the support leg installed on the base is integrally provided above the notch portion of the gantry body, and the installation height of the flat placement portion with respect to the support leg is increased. The foundation frame according to claim 1 or 2 , wherein an adjustable height adjusting means is provided in the flat mounting portion. The height adjusting means is constituted by a bolt attached to the flat mounting portion so as to be freely retractable downward, and the tip of the bolt contacts the bottom surface in the female screw portion of the support leg. The foundation frame according to claim 3 , wherein the foundation frame is formed to have a length that can be freely contacted and an outer diameter that can be freely fitted in the inner space of the female screw portion of the support leg. The load transmitting portion is configured by filling and solidifying a non-shrinkable solidifying material in a gap between the base and the gantry body in a state where the gantry body is set at an appropriate position on the support leg. Item 5. The foundation frame according to any one of Items 1 to 4 . The base frame according to claim 5 , wherein a through-hole capable of filling the non-shrinkable solidified material from above into the load transmission unit is formed in the frame body. A foundation forming method for forming a foundation by installing the foundation frame according to any one of claims 1 to 6 on a base,
The base having a plurality of high-rigid joists laid at intervals so that the base frame can be placed and supported is configured in advance, and a support leg that can support the basic frame on the high-rigid joists is installed in the longitudinal direction of the joists. It is installed with a gap in the direction, and the foundation gantry is arranged so as to be at a predetermined height on the foundation and between the support legs, and between the foundation and the foundation gantry. After the non-shrinkable solidifying material is filled and solidified, a fixing bolt is provided in a state of vertically passing through the foundation gantry, and below that, a state straddling between the lower surfaces of the adjacent high rigidity joists A foundation forming method in which a receiving metal fitting is arranged, the fixing bolt is screwed into the receiving metal fitting and tightened to clamp the foundation frame and the highly rigid joist up and down and fix them together.

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