WO2017170671A1 - Piling foundation structure - Google Patents

Abstract

Provided is a piling foundation structure that is easy to construct, thereby reducing construction costs and shortening construction time, and for which absorption of pile construction errors is easy. A piling 3 is joined to the foundation of an upper structure via a metal joint 2. The metal joint 2 has piling-side hardware 6 that joins with a piling head, foundation-side hardware 7 that directly joins with the foundation, and position adjustment hardware 8 that is interposed between the piling-side hardware and the foundation-side hardware. The piling-side hardware 6 is joined to the piling head by way of a pair of halved members 6d that have, fixed to the upper portion thereof, a horizontal plate 6c having a first joint bolt 6e for joining the position adjustment hardware. The position adjustment hardware 8 has: two y-axis direction first elongated holes 8b that are in a plate body 8a and into which two first joint bolts 6e are inserted; and two second joint bolts 8c for joining the foundation-side hardware. The foundation-side hardware 7 has: two x-axis direction second elongated holes 7b that are in a plate body 7a and into which the two second joint bolts 8c are inserted; and a rib 7c for aligning with respect to the foundation.

Description

Pile foundation structure

The present invention relates to a pile foundation structure in which a steel pipe pile and a wooden base of its superstructure are joined through joint hardware made of a plurality of hardware.

As a foundation for building structures and other structures, as shown in FIG. 25A, a pile foundation structure in which a steel foundation pile 3 is hit and a concrete foundation 51 such as a cloth foundation or a solid foundation is applied thereon has been widely used. It has been adopted. Then, a base (base beam) 4 is installed on the concrete foundation 51.
However, the concrete foundation 51 requires installation and removal of the formwork, placement of concrete, and curing, which is complicated, increases the construction cost, and increases the construction period.
In addition, the accuracy depends on the skill of the operator. For example, if the horizontality (level) of the upper end of the foundation is not secured, there is a problem that the upper structure is inclined.

For this reason, as shown in FIG. 25B, the steel pipe pile 3 and the base 4 of the upper structure are directly joined via the joint hardware 62 made of a plurality of hardware.
However, in general, it is difficult to construct a pile at a precise design position without any inaccuracy, and as shown in FIGS. 26A and 26B, horizontal construction errors (FIG. 26A) and high There are many cases where a vertical construction error (FIG. 26B) occurs, for example, about several tens of millimeters.
Therefore, in order to realize a pile foundation structure in which the concrete foundation is omitted and the pile and the base of the upper structure are joined through the joint hardware, it is necessary to provide a mechanism capable of absorbing this construction error.

Patent Document 1 will be described with reference to FIG. 1 and reference numerals in Patent Document 1. A gripping metal object 32 that grips the steel pipe pile 2, a vertical screw 30 that can be moved up and down on the gripping metal object 32, and a vertical screw 30. An annular bottom plate 4 supported on the bottom plate 4, a sheath tube 51 placed on the bottom plate 4 and provided with a horizontal screw 50, a top plate 52 fixed to the sheath tube 51, and an upper portion installed on the top plate 51 This is a structure having a structure 71 and concrete 6 filled between the sheath pipe 51 and the steel pipe pile 2.
The height position is adjusted by the vertical screw 30, and the horizontal position is adjusted by the horizontal screw 50.

Patent Document 2 will be described with reference to FIGS. 1, 2, 3, 4, and reference numerals in Patent Document 2 and is a joint hardware between a steel pipe pile 3 and a gantry (structure), and a pile head surface of the steel pipe pile 3. A nut 7 communicating with the bolt insertion hole 6 a is fixed to the back surface of the steel plate 6, and a fixing plate 10 a is provided on the receiving portion 10 that supports the gantry, and a rectangular tube-like connecting block is provided between the steel pipe pile 3 and the receiving portion 10. And a first elongated hole 12 is formed at the center of the lower surface plate 4a of the connecting block 4 and extends in a direction perpendicular to the longitudinal direction of the first elongated hole 12 at the four corners of the upper surface plate 4b. A long hole 16 is formed, and the bolt insertion hole 6a of the pile head surface 6 and the first long hole 12 of the lower surface plate 4a, the bolt insertion hole 18 provided in the fixing plate 10a of the receiving portion 10 and the first of the upper surface plate 4b. Adjust the positional deviation of the two long holes 16 respectively, Is that fixed by Tsu door.
Then, a fastening bolt 13 is passed through the first long hole 12 provided in the lower surface plate 4a of the connecting block 4 and the nut is screwed and tightened, and another fastening bolt 13 is passed through the second long hole 16 provided in the upper surface plate 4b. The pile 3 and the gantry (structure) are joined via the connecting block 4 by screwing and tightening, but if the steel pile head and the structure are relatively misaligned The position is adjusted by the first long hole 12 of the lower surface plate 4a and the second long hole 16 of the upper surface plate 4b.

JP 2005-226309 A JP2012-207463

The joint hardware of Patent Document 1 seems to assume a large superstructure, but is complicated and unsuitable for use in a basic structure of a structure such as a house.

In the joint hardware of Patent Document 2, the connection block 4 that joins the steel pipe pile 3 and the gantry has a rectangular tube shape, and it is difficult to say that the operation of bolt connection is easy.

The present invention has been made to eliminate the above-mentioned conventional drawbacks, and the upper structure is suitable as a pile foundation structure having a structure equal to or lower than, for example, a house. The construction is simple and the construction cost is reduced and the construction period is shortened. An object of the present invention is to provide a pile foundation structure that can be easily adjusted and positioned to absorb pile construction errors.

One aspect of the present invention that solves the above problems is a pile foundation structure formed by joining a steel pipe pile and a wooden base of its superstructure through a joint hardware composed of a plurality of hardware,
The joint hardware includes a pile side hardware to be joined to the head of the pile, a base side hardware to be directly joined to the foundation, and the pile side hardware and the foundation side hardware interposed between the pile side hardware and the base side hardware. Position adjustment hardware for joining the position adjustment hardware in two horizontal directions of the X-axis direction and the Y-axis direction orthogonal to each other, and adjusting the height position of the base-side hardware With means,
The pile-side hardware has a pair of halved members having flange portions on both sides of the semi-cylindrical portion and a horizontal plate fixed to the upper part of each semi-cylindrical portion, and a pair of positions fixed vertically to the horizontal plates. A first joining bolt for adjusting hardware joining, sandwiching the pile head from both sides with the pair of halved members, and fastening the flanges with bolts to join the pile head,
The position adjustment hardware has two first long holes in the Y-axis direction in which the two first joining bolts of the pile-side hardware are respectively inserted in the plate-shaped main body, and in the Y-axis direction. It is a configuration having two second joining bolts for joining to the base-side hardware fixed vertically with an interval between them,
The base-side hardware has two second long holes extending in the X-axis direction in which the two second joining bolts of the position adjusting hardware are respectively inserted in the plate-shaped main body, and the position of the base-side hardware relative to the base It is a pile foundation structure which is a structure which has a matching means.

In the pile foundation structure, the shape of the horizontal plate of the pile-side hardware is substantially fan-shaped surrounded by two line segments extending toward the left and right sides of the inner surface of the semi-cylindrical portion with the cylindrical core side of the semi-cylindrical portion as the apex. Also good.

In the pile foundation structure, the flange portions of the halved members of the pile-side hardware are thicker than the flange portion plate thickness by 1.5 times or more, and the vertical and horizontal dimensions are respectively arranged on the outer surface of each flange portion. It may be tightened with a bolt with a rectangular washer that is 50% or more of the vertical dimension of the flange portion and 70% or more of the horizontal dimension.

In the above pile foundation structure, horizontal reinforcing ribs are respectively welded to the outer surface of the flange portion and the outer surface near the end of the semi-cylindrical portion at the upper and lower positions of the outer surface of the flange portion on both sides of each half member of the pile side hardware. It may be fixed in such a manner.

In the pile foundation structure, as a means for aligning the foundation side hardware with the foundation, a rib inserted into a slit formed on the bottom surface side of the foundation is fixed vertically on the upper surface of the plate-shaped main body, and alignment with the foundation is performed. A drift pin hole may be provided.

In the pile foundation structure, the base side hardware is provided with a Y-axis direction elongated hole for inserting an anchor bolt through which the vicinity of the lower end of the anchor bolt of the hole down hardware attached to the column is passed, and the position of the base side hardware with respect to the base As an aligning means, round steel inserted into an alignment hole formed on the lower surface side of the base may be fixed vertically on the upper surface of the plate-shaped main body.

In the above pile foundation structure, ribs are fixed to the upper surface of the plate-like main body of the base-side hardware on both sides in the X-axis direction and both sides in the Y-axis direction with the center portion interposed therebetween, and the plate for directly placing the base on the ribs A cover may be placed.

In the pile foundation structure, the height position adjusting means for adjusting the height position of the base side hardware includes a spacer having a desired thickness dimension between the plate body of the position adjustment hardware and the plate body of the base side hardware. It may be a height position adjusting means by interposing.

In the pile foundation structure, even if the height position adjusting means for adjusting the height position of the base side hardware is a height position adjusting means for adjusting the mounting height position of the pile side hardware to the pile head. Good.

In the above pile foundation structure, the outer circumference of the steel pipe so that the upper end edge is located at the lower end edge of the pile side hardware to be attached to the auxiliary belt for defining the mounting height position of the pile side hardware to the pile head It may be wound around the surface and fixed.

According to the present invention, the pile head and the base are joined via the joint hardware composed of the pile side hardware, the foundation side hardware, and the position adjustment hardware installed on the pile head, and the construction of the concrete foundation is performed. Since it is unnecessary, the construction period can be greatly shortened and the construction cost can be reduced.

The horizontal position adjustment of the base-side hardware is the Y-axis direction position adjustment of the position-adjustment hardware having the first long hole to the pile-side hardware, and the X-axis direction position of the base-side hardware having the second long hole to the position adjustment hardware. It can be done easily by adjustment, and since it has means for adjusting the height position of the foundation side hardware, it is possible to adjust the construction error of the pile construction, that is, the construction error in the horizontal direction and the height direction of the pile head position. The pile construction error due to the skill of the operator is rarely a problem.
Also, the joint hardware installation work to attach the joint hardware is to attach the pile side hardware to the pile head, attach the position adjustment hardware on it, and install the base side hardware on it, all of which are bolt and nut tightening operations It can be done by simple work and has good workability.
In addition, the pile-side hardware has a simple structure in which a pair of halved members with a horizontal plate with the first joining bolt fixed to the upper end are sandwiched between the pile heads from both sides and tightened with bolts and nuts to secure them to the pile heads. In this simple structure, the position adjusting means in the horizontal Y-axis direction of the position adjusting hardware having the first long hole is realized.

According to the pile-side hardware 16 of claim 2, the horizontal plate 16c has a sector shape, and there are no joint portions with the vicinity of the flange portions 6b on both sides of the semi-cylindrical portion 6a. Unlike the case, the horizontal plate 16c does not restrain the vicinity of both ends of the semi-cylindrical portion 6a (the vicinity of the left and right flange portions 6b). Therefore, when the opposing flange portions 6b are tightened with bolts 12 and nuts 13, the vicinity of the left and right end portions of the semi-cylindrical portion 6a can flex flexibly, and the entire semi-cylindrical portion 6a closely adheres to the outer surface of the pile. It is possible to generate a large frictional force, and a sufficiently high joining force can be secured.

According to the pile-side hardware 16 ′ of claim 3, a large bolt tension is applied to the semi-cylindrical portion 6a via the flange portion 6b by tightening the bolt 12 with a rectangular flat washer 17 having a large vertical and horizontal dimension with a thick plate. Can communicate. Thereby, the contact | adhesion power of the semicylindrical part 6a and a pile outer surface can further be strengthened, the frictional force of the semicylindrical part 6a and a pile outer surface can be increased, and joining force can be increased.

According to the pile-side hardware 16 "of claim 4, it is not fixed simply by welding to the outer surface of the flange portion 6b at the upper and lower positions of the flange portion 6b, but is also fixed to the outer surface near the end of the semi-cylindrical portion 6a by welding. Therefore, the rigidity of the flange portion 6b is substantially increased, and even when the bolt 12 is strongly tightened, the flange portion 6b is not tilted by the pulling force, and a large bolt tension is halfway through the flange portion 6b. This can be transmitted to the cylindrical portion 6a, thereby further increasing the adhesion between the semi-cylindrical portion 6a and the outer surface of the pile, increasing the frictional force between the semi-cylindrical portion 6a and the outer surface of the pile, and increasing the joining force. Can do.

The height position adjustment of the joint hardware is a means of interposing a spacer between the position adjustment hardware and the base side hardware as in claim 8, or the mounting of the pile side hardware to the pile head as in claim 9. Although the height position adjusting means for adjusting the height position can be employed, a height position adjusting means that does not bother is realized.
When adopting the height position adjusting means by adjusting the mounting height position of the pile side hardware to the pile head as in claim 9, the pile side hardware to the pile head as in claim 10 is adopted. When the auxiliary belt for defining the mounting height position is wound around and fixed to the outer peripheral surface of the steel pipe so as to be positioned at the lower edge of the pile-side hardware, the pile-side hardware can be accurately and easily placed at the predetermined height position of the pile head. Can be attached.

In the case of a beam joint type in which only a pile and a base (base beam) are joined, a vertical rib may be fixed to the upper surface of the plate-like main body of the base-side hardware. By inserting this rib into a slit formed on the lower surface side of the base and using a drift pin, alignment with the base becomes possible.

In the case of the column beam connection type in which the pile, the column, and the base (base beam) are connected, it is preferable that the round steel be fixed vertically on the upper surface of the plate-like main body of the base-side hardware. By inserting this round steel into the alignment hole provided on the bottom surface of the foundation, it is possible to align the foundation-side hardware and the foundation, but this configuration is based on the pillar and foundation using hole-down hardware attached to the pillar. It is suitable for joining.
That is, by inserting the anchor bolt of the hole down hardware into the anchor insertion hole provided in the base, it is possible to join the pillar and the base, so that the pile, the pillar and the base (base beam) can be joined together. it can.
As described above, according to the pile foundation structure of the present invention, it is possible to cope with the case of the beam joint type and the case of the column beam joint type simply by replacing the base side hardware.

FIG. 1 shows a pile foundation structure of one embodiment of the present invention (in the case of a beam joint type in which only a pile and a base (base beam) are joined) in a state before joining the base to the joint hardware. FIG. 2 is a side view as viewed from the opposite side (front side) to the X-axis direction of FIG. 3 is a side view (= left side view of FIG. 2) seen from the Y-axis direction of FIG. FIG. 4 is an exploded perspective view of FIG. 5A is a plan view of FIG. 2 (= plan view of FIG. 1). FIG. 5B is a plan view of the base-side hardware in FIG. FIG. 5C is a plan view of the position adjustment hardware in FIG. FIG. 6 is a view showing a state in which a wooden base (base beam) is installed on the joint hardware in FIG. 2, but only the base portion is shown in cross section. FIG. 7 is a diagram (= left side view of FIG. 6) showing a state in which a wooden base (base beam) is installed on the metal joint in FIG. 3, but only the base portion is shown in cross section. FIG. 8A is a plan view illustrating a usage mode of an auxiliary belt for defining a mounting height position of a pile-side hardware on a pile head. FIG. 8B is a side view illustrating a usage mode of the auxiliary belt for defining a mounting height position of the pile side hardware to the pile head. FIG. 9 shows a pile foundation structure of another embodiment of the present invention (in the case of a column beam connection type in which a pile, a column, and a base (base beam) are bonded) before the base and the column are bonded to the joint hardware. It is the perspective view shown in the state. FIG. 10 is a side view seen from the opposite side (front side) of the X-axis direction of FIG. 11 is a side view (= left side view of FIG. 10) seen from the Y-axis direction of FIG. 12 is an exploded perspective view of FIG. FIG. 13A is a plan view of FIG. 10 (= plan view of FIG. 9) (a base and a column are indicated by a two-dot chain line). FIG. 13B is a plan view with the base-side hardware in FIG. 13A removed (the base and the pillar are indicated by a two-dot chain line). FIG. 13C is a plan view with the position adjusting hardware in FIG. 13B removed (the base and the column are indicated by a two-dot chain line). FIG. 14 is a diagram showing only the base-side hardware except for the pile-side hardware and the position adjustment hardware in FIG. 13A (the base and the pillar are indicated by a two-dot chain line). FIG. 15 is a view showing a state in which a base and a pillar are installed on the metal joint in FIG. FIG. 16 is a view showing a state in which a base and a pillar are installed on the metal joint in FIG. FIG. 17A shows another embodiment of the base-side hardware 37 in the joint hardware 31 shown in FIGS. 9 to 16, and corresponds to the position adjusting hardware and the base-side hardware 7 in FIG. FIG. 17B shows another embodiment of the base-side hardware 37 in the joint hardware 31 shown in FIGS. 9 to 16, and corresponds to FIG. FIG. 18 is a diagram for explaining a pile-side hardware 16 of another embodiment of the pile-side hardware in each of the above-described embodiments, and is a perspective view excluding the position adjusting hardware 8 and the base-side hardware 7 in FIG. It is a figure equivalent to a figure. FIG. 19A is a perspective view showing a state immediately before the pile-side hardware 16 of FIG. 18 is joined to the pile head with a bolt (however, the first joining bolt 6e is not shown). FIG. 19B is a plan view showing a state in which the pile-side hardware 16 is a bolt on the pile head. 20A is a front view of FIG. 19B. 20B is a left side view of FIG. 20A. FIG. 21A shows a pile-side hardware 16 ′ of still another embodiment in which a thick plate rectangular washer is added to the pile-side hardware 16 of the embodiment shown in FIGS. 18 to 20B, and corresponds to FIG. 19A. FIG. FIG. 21B shows a pile side hardware 16 ′ of still another embodiment obtained by adding a rectangular flat washer to the pile side hardware 16 of the embodiment shown in FIGS. 18 to 20B, and corresponds to FIG. 19B. FIG. 22A is a front view of FIG. 21B. 22B is a left side view of FIG. 22A. FIG. 23A shows a pile side hardware 16 ″ of still another embodiment, and corresponds to FIG. 19A. FIG. 23B shows a pile side hardware 16 ″ of still another embodiment, and corresponds to FIG. 19B. FIG. 24A is a front view of FIG. 23B. 24B is a left side view of FIG. 24A. 25A and 25B show a pile foundation structure (FIG. 25A) in which a foundation of an upper structure is installed on a concrete foundation constructed on a steel pipe pile, and a joint hardware consisting of a plurality of hardware parts of the steel pipe pile and the foundation of the upper structure. It is a figure which compares and demonstrates the pile foundation structure (FIG. 25B) directly joined via. 25A and 25B show a pile foundation structure (FIG. 25A) in which a foundation of an upper structure is installed on a concrete foundation constructed on a steel pipe pile, and a joint hardware consisting of a plurality of hardware parts of the steel pipe pile and the foundation of the upper structure. It is a figure which compares and demonstrates the pile foundation structure (FIG. 25B) directly joined via. FIG. 26A is a diagram illustrating construction errors that occur during pile construction. FIG. 26B is a diagram illustrating construction errors that occur during pile construction.

Hereinafter, the form for implementing the pile foundation structure of this invention is demonstrated with reference to drawings.

The pile foundation structure of the present invention is either a beam joint type in which only a pile and a base (base beam) are joined, or a column beam joint type in which a pile, a column, and a base (base beam) are joined. It can also be applied to.
1 to 8B show a pile foundation structure 1 according to an embodiment of the present invention in the case of the beam joint type in which only a pile and a base (base beam) are joined. FIG. 1 is a perspective view showing a state before joining a base to a joint hardware 2 in a pile foundation structure 1, and FIG. 2 is a side view of the pile foundation structure in FIG. 1 viewed from the opposite side (front side) to the X-axis direction. 3 is a side view of the pile foundation structure of FIG. 1 as viewed from the side opposite to the Y-axis direction (front side), and FIG. 4 is an exploded perspective view of FIG.
As shown in these drawings, the pile foundation structure 1 is a pile foundation structure formed by joining a steel pipe pile 3 and a wooden base 4 described later of the superstructure through the joint hardware 2. .
The joint hardware 2 is interposed between the pile side hardware 6 to be joined to the head 3 a of the pile 3, the base side hardware 7 to be joined to the base 4, and the pile side hardware 6 and the base side hardware 7. A position adjustment hardware 8 for joining the pile side hardware 6 and the foundation side hardware 7 so that the positions can be adjusted in the two horizontal directions of the X-axis direction and the Y-axis direction orthogonal to each other, and the height of the foundation-side hardware Height position adjusting means is provided for adjusting the height position. The height position adjusting means in this embodiment is a spacer 20 described later.

FIGS. 5A, 5B, and 5C show supplementary relationships between the stake pile-side hardware 6 and the position adjustment hardware 8 and the connection relationships between the position adjustment hardware 8 and the base-side hardware 7. FIG. 5A is a plan view of FIG. 2 (= plan view of FIG. 1), FIG. 5B is a plan view with the base side metal piece 7 in FIG. 5A removed, and FIG. 5C is a view with the position adjustment metal piece 8 in FIG. It is a top view.

The pile-side hardware 6 has a flange-like portion 6b on both sides of a semi-cylindrical portion 6a, and a band-like half made of a pair of flexible metal plates having a horizontal plate 6c fixed to the upper part on the inner surface side of each semi-cylindrical portion. There are provided a member 6d and a first joining bolt 6e for joining a position adjusting hardware (for joining with the position adjusting hardware) fixed vertically to each horizontal plate 6c. The part excluding the horizontal plate 6c in the pile-side hardware 6 is substantially the same as that of a type in which a pair of halves having flanges on both sides are coupled with bolts in what is called a power pole band or the like. .
The first joining bolt 6e is passed through the hole formed in the horizontal plate 6c from the lower surface side of the plate, and the bolt head on the lower surface side is welded and fixed to the horizontal plate 6c (may be fixed temporarily by spot welding).
Then, the pile head 3a is sandwiched from both sides by the pair of half members 6d, and the flanges 6b are fastened with bolts 12 passed through the bolt insertion holes 6f and nuts 13 screwed into the bolt heads. It joins to part 3a.

The position adjustment hardware 8 has two first long holes 8b that are long in the Y-axis direction in which the two first joining bolts 6e of the pile-side hardware 6 are inserted into a rectangular plate-shaped main body 8a, And it is the structure which has the 2nd 2nd volt | bolts 8c for joining to the base side metal fittings (for joining with a base side metal fitting) fixed perpendicularly at intervals in the Y-axis direction. A nut to be screwed onto the first joining bolt 6e is indicated by 6e ′.
The second connecting bolt 8c is fixed by welding so that the bolt head 8d on the lower surface side of the plate-like main body 8a is not dropped out by inserting the bolt shaft portion into the hole formed in the plate-like main body 8a. (Temporary fixing by spot welding is sufficient.)
In the illustrated example, a plate-like leg 8e is provided on the lower surface of the plate-like main body 8a to provide a space for intersecting the bolt head 8d.

The base-side hardware 7 has, in a rectangular plate-shaped main body 7a, two second long holes 7b that are long in the X-axis direction into which the two second joining bolts 8c of the position adjusting hardware 8 are respectively inserted. And it is the structure which has the rib 7c which is the alignment means with respect to a base on the upper surface. The rib (positioning means) 7c has a drift pin insertion hole 7d for positioning with the base 4, and is fixed vertically to the plate-like main body 7a. A nut to be screwed into the second joining bolt 8c is indicated by 8c '.

2 and 3, reference numeral 20 designates a spacer between the plate-like main body 7 a of the base-side hardware 7 and the plate-like main body 8 a of the position-adjusting hardware 8 as means for adjusting the height position of the base-side hardware 7. That spacer in case.

The construction procedure for constructing the above pile foundation structure 1 will be described.
This embodiment assumes a case where, for example, in construction for constructing a structure such as a house, a pile already placed and a wooden base of an upper structure installed thereon are joined. After all the piles 3 necessary for construction are placed, the joint hardware 2 is attached to the pile head 3a.
First, the pile-side hardware 6 is attached to the head 3 a of the pile 3. In this case, the pile-side hardware 6 is piled by sandwiching the pile head 3a from both sides with two flexible band-shaped halves 6d and fastening the opposing flanges 6b with bolts 12 and nuts 13. Fix to the head 3a.

In this case, when the spacer 20 is used as the height position adjusting means of the base-side hardware 7, the pile-side hardware 6 is placed on the pile head 3 a with the horizontal plate 6 c placed directly on the upper end surface of the pile 3. Fix it.

Next, the position adjusting hardware 8 is attached on the pile side hardware 6. In this case, the position adjusting hardware 8 is placed on the pile-side hardware 6 so that the first joining bolt 6e of the pile-side hardware 6 is inserted into the first elongated hole 8b, and the nut 6e 'is used for the first joining. Screw onto the bolt 6e (the nut 6e ′ is not yet fully tightened at this stage).
Next, the base-side hardware 7 is placed on the position adjustment hardware 8 so that the second joining bolt 8c of the position adjustment hardware 8 is inserted into the second elongated hole 7b, and the nut 8c ′ is placed on the second joining bolt. It is screwed to 8c (the nut 8c 'is not finally tightened at this stage).
At this stage, the position adjusting hardware 8 and the base hardware 7 are assembled on the pile hardware 6.

After the above-described operation of assembling the position adjustment hardware 8 and the foundation side hardware 7 on the pile side hardware 6 is completed, the horizontal adjustment (X axis direction and Y axis direction) and the height adjustment of the foundation side hardware 7 are performed. do.

In the position adjustment in the Y-axis direction, the position adjustment hardware 8 is moved and adjusted in the Y-axis direction with respect to the pile-side hardware 6. In this case, since the first long hole 8b of the position adjusting hardware 8 into which the first joining bolt 6e of the pile side hardware 6 is inserted is a long hole in the Y axis direction, the position adjusting hardware 8 is moved in the Y axis direction. Can be adjusted.
In the position adjustment in the X-axis direction, the base-side hardware 7 is moved and adjusted relative to the position-adjusting hardware 8 in the X-axis direction. In this case, since the second long hole 7b of the base side metal piece 7 into which the second joining bolt 8c of the position adjusting metal piece 8 is inserted is a long hole in the X axis direction, the base side metal piece 7 is moved in the X axis direction. Can be adjusted.

The height position adjustment has a predetermined thickness dimension between the plate-like body 8a of the position-adjusting hardware 8 and the plate-like body 7a of the base-side hardware 7 as shown by the one-dot chain line in FIGS. The spacer 20 is inserted (intervened). In this case, spacers having various thicknesses are prepared, and they can be appropriately selected to obtain a predetermined thickness dimension.
As shown in FIG. 5B, the illustrated spacer 20 has a U-shape in plan view. However, the bolt 20 existing between the plate-like main body 8a of the position adjusting hardware 8 and the plate-shaped main body 7a of the base-side hardware 7 The shape should not interfere with the nut. Further, the plate-like main body 8a of the position adjusting hardware 8 and the plate-like main body 7a of the base-side hardware 7 such as a plurality of members arranged side by side so as not to interfere with bolts and nuts are not limited to a U-shape in plan view. A member capable of adjusting the height while maintaining the state is desirable.

In addition, when adopting the height position adjusting means for adjusting the mounting height position of the pile side hardware 6 to the pile head 3a as the height position adjusting means of the base side hardware 7, for example, FIGS. 8A and 8B. It is preferable to use an auxiliary belt 21 as shown in FIG. The auxiliary belt 21 in the illustrated example is one in which the other end is passed through a buckle 21a on one end side, and the other end side is drawn and tightened and fixed.
In this case, the auxiliary belt 21 is wound around and fixed to the outer periphery of the pile 3 so that the upper end edge 21b of the auxiliary belt 21 is positioned at the lower end edge 6g of the pile side hardware 6 to be attached. After the lower end edge 6g is positioned so as to contact the upper end edge 21b of the auxiliary belt 21, it is fixed to the pile head 3a.
As the auxiliary belt 21, a so-called electric pole band can be used, but it is not necessarily a metal band and may not be flexible. What is necessary is just to be able to position the lower end edge 6g of the pile-side hardware 6.

After correctly attaching and attaching the joint hardware 2 to the head 3a of each pile 3 as described above, the base 4 of the upper structure is installed on the joint hardware 2 as shown in FIGS. .
In this embodiment, the base 4 is placed on the base-side hardware 7 so that the ribs 7 c of the base-side hardware 7 are inserted into the grooves 4 a provided on the lower surface of the base 4. Then, as alignment in the longitudinal direction of the base 4, the drift pin 22 is inserted from the opening end of the lateral drift pin fitting hole 4 b provided in the base 4, and the drift pin insertion hole 7 d of the base side hardware 7 is penetrated. The drift pin fitting hole 4b is not penetrating but is opened only on one side.
In this case, since the horizontal and vertical position adjustments of the joining hardware 2 (the base-side hardware 7) are correct, the drift pin 22 has the drift pin fitting hole 4b and the drift pin insertion hole 7d correctly aligned. And plugged into.

According to this pile foundation structure 1, as described above, the construction of the concrete foundation is unnecessary, so that the construction period can be greatly shortened and the construction cost can be suppressed.

In addition, the joint hardware 2 is an operation of moving and adjusting the position adjustment hardware 8 with respect to the pile-side hardware 6 in the Y-axis direction, and an operation of moving and adjusting the base-side hardware 7 with respect to the position adjustment hardware 8 in the X-axis direction. Position adjustment in the horizontal direction can be performed, and height position adjustment is performed by means for interposing the spacer 20 between the position adjustment hardware 8 and the base side hardware 7 or by adjusting the mounting position of the pile side hardware 6 itself. Therefore, the pile construction error can be easily absorbed, and the pile construction error due to the skill of the operator is rarely a problem.
In addition, the position adjustment operation can be performed by a simple operation such as a bolt / nut tightening operation, and the workability is good.
Also, the position adjustment structure is extremely simple and can be manufactured at low cost.
In particular, the pile-side hardware 6 has a simple structure including a pair of halved members 6d having a horizontal plate 6c with a first joining bolt 6e fixed to the upper end, and realizes a horizontal Y-axis position adjusting means. ing.

FIG. 9 is a perspective view of the pile foundation structure 31 according to another embodiment of the present invention in a state before the base is joined to the joint hardware 32. This embodiment is a case of a column beam joining type in which a pile, a column, and a base (base beam) are joined. As will be described later, the column 40 is used with a hole-down hardware 41 for preventing the pillar 40 from coming off the base 4. Join the foundation.
10 is a side view of the pile foundation structure 31 of FIG. 9 viewed from the opposite side (front side) of the X-axis direction, FIG. 11 is a side view of the pile foundation structure 31 of FIG. 9 viewed from the Y-axis direction, and FIG. FIG. 10 is an exploded perspective view of FIG. 9.
As shown in these drawings, this pile foundation structure 1 is a pile foundation structure formed by joining a steel pipe pile 3 and a wooden base 4 and a column 40 of its superstructure via the joint hardware 32. is there.
The joint hardware 32 is interposed between the pile side hardware 6 joined to the head 3 a of the pile 3, the foundation side hardware 37 joined to the base 4, and the pile side hardware 6 and the base side metal 37. A position adjustment hardware 8 for joining the pile side hardware 6 and the foundation side hardware 37 so that the positions of the pile side hardware 6 and the foundation side hardware 37 can be adjusted in the two horizontal directions of the X axis direction and the Y axis direction orthogonal to each other; Height position adjusting means is provided for adjusting the height position. The height position adjusting means in the illustrated example is a spacer 20.

13A, FIG. 13B, FIG. 13C, the connection relationship between the pile side hardware 6 and the position adjustment hardware 8, the connection relationship between the position adjustment hardware 8 and the base side hardware 37, including the relationship between the base 4 and the pillar 40. And it supplementarily shows in FIG. FIG. 13A is a plan view of FIG. 10 (= plan view of FIG. 9), FIG. 13B is a plan view with the base-side hardware 37 in FIG. 13A removed, and FIG. 13C is with the position adjustment hardware 8 in FIG. It is a top view. FIG. 14 is a view showing only the base-side hardware 37, the base 4, and the pillar 40 in FIG. 13A.
This embodiment is a pile foundation structure of a column beam connection type in a corner pillar, and in FIGS. 13A to 16 in which the foundation 4 and the pillar 35 are illustrated, the foundation extending in the X-axis direction is simply indicated by reference numeral 4, and A base extending in the orthogonal Y-axis direction is denoted by reference numeral 4 ′.

In the pile foundation structure 31 of this embodiment, the pile 3, the pile side hardware 6, and the position adjustment hardware 8 are the same as the pile foundation structure 1 of the first embodiment, which is a case of the beam joint type, and the foundation side hardware 37 is different. .

The foundation side hardware 37 will be described. The base-side hardware 37 has two second long holes 37b that are long in the X-axis direction in which the two second joining bolts 8c of the position adjusting hardware 8 are inserted into a rectangular plate-shaped main body 37a. This is common to the pile foundation structure 1 of the first embodiment.
However, the base-side hardware 37 is vertically fixed with a round steel 37e for alignment with the base 4 at the center position of the upper surface of the plate-shaped main body 37a, and ends thereof at both ends of the plate-shaped main body 37a in the X-axis direction. The first rib 37f extending along the edge (in the Y-axis direction) is fixed, and the second rib 37g in a state of striking between the first ribs 37f on both sides is fixed on both sides in the Y-axis direction across the round steel 37e. Furthermore, a Y-axis direction elongated hole 37h for inserting an anchor bolt through which the vicinity of the lower end of the anchor bolt 41a of the hole-down hardware 41 passes is provided inside each of the first ribs 37f on both sides of the plate-shaped main body 37a.
The ribs 37f and 37g on the upper surface of the plate-like main body 37a may have a structure in which the ribs 37f and 37g are not provided like the base-side hardware 37 ′ shown in FIG. 17A. In this case, the rigidity of the plate-shaped main body 37a is increased, and the second joining bolt 8c protruding from the upper surface of the plate-shaped main body 37b and the nut 8c 'screwed to the second bonding bolt 8c are configured not to interfere with the base 4. Since the bases 4 and 4 ′ are installed directly on the plate-like main body 37a of the base-side hardware 37 ′, for example, as shown in FIG. 17B, the second joint is used at the lower part of the end of the base 4 ′ positioned in the orthogonal direction. A notch 4d ′ may be formed so as not to interfere with the bolt 8c and the nut 8c ′. The notch 4d ′ can be a notch that penetrates in the base width direction, or a notch only in the bolt 8c and nut 8c ′ portions.

The hole-down hardware 41 has a structure in which a mounting plate 41c to which a female screw member 41b to which an anchor bolt 41a is screwed is fixed is fixed to a column 40 with a bolt. The column 40 is joined to the base 4 by tightening the nut 43 screwed into the lower end of the Y-axis direction long hole 37h for inserting the anchor bolt 37. 41d is a nut screwed into the upper part of the anchor bolt 41a.
Further, in this embodiment, on the second rib 37g of the base-side metal fitting 37, there is a base having a protruding piece 39b bent downward at both ends of the flat plate portion 39a and an anchor bolt insertion hole 39c in the center. A plate-shaped cover 39 for receiving directly is placed.

The construction procedure for constructing the pile foundation structure 31 will be described.
The operation | work which attaches the pile side metal fitting 6 to the head 3a of the pile 3 and attaches the position adjustment metal fitting 8 on the pile side metal fitting 6 is the same as the case of the pile foundation structure 1 of Example 1. FIG.
Further, the work for attaching the base-side hardware 37 onto the position adjustment hardware 8 is the same as that in the first embodiment. That is, the base metal fitting 37 is placed on the position adjusting hardware 8 so that the second joining bolt 8c of the position adjusting hardware 8 is inserted into the second long hole 37b, and the nut 8c ′ is placed on the second joining bolt. The nut 8c is screwed (the nut 8c ′ is not yet tightened at this stage).

After the above-described operation of assembling the position adjustment hardware 8 and the foundation side hardware 37 on the pile side hardware 6 is completed, the horizontal position (X axis direction and Y axis direction) of the foundation side hardware 37 and the position adjustment in the height direction are performed. do. This position adjustment work is the same as that of the first embodiment, and the position adjustment hardware 8 is moved and adjusted in the Y-axis direction along the first long hole 8b of the position adjustment hardware 8 with respect to the pile side hardware 6 to obtain a base. The side metal fitting 37 is moved and adjusted in the X-axis direction with respect to the position adjustment hardware 8 in the second long hole 37b of the base metal fitting 37.
The height position adjustment is the same as that of the first embodiment, and a spacer 20 having a predetermined thickness is inserted between the plate-like main body 8a of the position-adjustment metal piece 8 and the plate-like main body 37a of the base-side metal piece 37. (Intervene) or adjust the mounting height position of the pile-side hardware 6 to the pile head 3a.

After correctly attaching and attaching the joint hardware 32 to the head 3a of each pile 3 as described above, the base 4 of the upper structure is installed on the joint hardware 32 as shown in FIGS. .
In this case, the base 4 is placed on the base-side hardware 37 so that the round steel 37e of the base-side hardware 37 enters the hole 4c provided on the lower surface of the base 4. Thereby, the longitudinal alignment of the base-side hardware 37 with respect to the base 4 is performed.
In addition, if the base 4 is directly placed on the second rib 37g of the base-side hardware 37, there is a possibility that the wooden base 4 may be sunk, so that a plate-like shape placed on the second rib 37g as shown in the figure. The base 4 is placed on the cover 39.

Next, the vicinity of the lower end (near the tip) of the anchor bolt 41a of the hole-down hardware 41 is passed through the Y-axis direction long hole 37h for inserting the anchor bolt of the base-side hardware 37, and the nut 43 screwed to the lower end portion thereof The column 40 is joined to the base 4 by tightening.
As described above, the pile foundation structure 31 of the column beam connection type is constructed.

Although this pile foundation structure 31 is a case of a column beam connection type, the same various effects as the case of Example 1 are acquired.
In addition, as described above, according to the pile foundation structure of the present invention, the foundation-side hardware is replaced between the beam joint type (pile foundation structure 1) and the column beam joint type (pile foundation structure 31). Only (7 and 37) can be handled.

18 to 20B show a pile-side hardware 16 of another embodiment of the pile-side hardware in each embodiment described above. FIG. 18 is a perspective view corresponding to the view of FIG. 4 excluding the position adjusting hardware 8 and the base-side hardware 7. FIG. 19A is a perspective view showing a state immediately before the pile-side hardware 16 of FIG. 18 is joined to the pile head with a bolt (however, the first joining bolt 6e showing the hole 6h through which the first joining bolt 6e is passed). FIG. 19B is a plan view showing a state in which the pile side hardware 16 is joined to the pile head with a bolt. 20A is a front view of FIG. 19B, and FIG. 20B is a left side view of FIG. 20A.
As shown in these figures, the pile-side hardware 16 of this embodiment is a horizontal plate that is a half member from the pile-side hardware 6 of the embodiment shown in FIGS. 1 to 7 (hereinafter also referred to as FIG. 1). Is different. That is, the half member 16d of the pile-side hardware 16 of this embodiment is the same as the half member 6d in FIG. 1 and the like with respect to the semi-cylindrical portion 6a, the flange portion 6b, and the first joining bolt 6e. The horizontal plate 16c is different from the horizontal plate 6c of FIG.
The shape of the horizontal plate 6c in the embodiment of FIG. 1 or the like in plan view is a half moon shape composed of an arc along the inner surface of the pile and a straight line connecting both ends of the arc, but the shape of the horizontal plate 16c in this embodiment is The semi-cylindrical portion 6a has a fan-shape surrounded by two straight lines 16ck with the cylindrical core side as an apex and extending toward the left and right sides of the inner surface of the semi-cylindrical portion. The horizontal plate 6c in the illustrated example has a sector shape with a central angle θ of 120 °. That is, it is a sector shape in which both sides of the straight portion of the half-moon shaped horizontal plate 6c of FIG. 1 and the like are cut by 30 ° (angle α).
Therefore, the horizontal plate 16c has a shorter half-moon-shaped arc portion than the horizontal plate 6c of FIG. 1 and the like, and there is no weld joint portion between the flange portions 6b on both sides of the semi-cylindrical portion 6a. .

A pulling force may act on the pile. When the pulling force is generated, the pile-side hardware 16 receives a tensile force in the bolt axial direction via the first joint bolt 6e. . The tensile force is countered by the frictional force between the pile-side hardware 16 and the steel pipe pile.
When joining the pile-side hardware 16 to the pile head, the pile head 3a is sandwiched from both sides by two halved members 16d, and the opposing flange portions 6b are tightened with bolts 12 and nuts 13 to The two semi-cylindrical portions 6a sandwiched are in close contact with the outer surface of the pile. In order to exhibit a predetermined frictional force, it is necessary that the semi-cylindrical part 6a and the outer surface of the pile are sufficiently tightly adhered.
In the pile-side hardware 16 of this embodiment, the horizontal plate 16c has a sector shape, and there is no joint portion with the vicinity of the flange portion 6b on both sides of the semi-cylindrical portion 6a. Unlike the horizontal plate 16c, the horizontal plate 16c does not restrain the vicinity of both ends of the semi-cylindrical portion 6a (the vicinity of the left and right flange portions 6b). Therefore, when the opposing flange portions 6b are tightened with bolts 12 and nuts 13, the vicinity of the left and right end portions of the semi-cylindrical portion 6a can flex flexibly, and the entire semi-cylindrical portion 6a closely adheres to the outer surface of the pile. It is possible to generate a large frictional force, and a sufficiently high joining force can be secured.
In addition, when the relationship between the generated stress and deformation of the horizontal plate when the tensile force of the required performance value was applied to the first joint bolt 6e in two cases of the half-moon shape and the sector shape by FEM analysis, It was found that the stress was kept within the elastic limit and no residual deformation occurred. Therefore, it can be said that there is no adverse effect of changing from a half moon shape to a fan shape.

FIG. 21A, FIG. 21B, FIG. 22A, and FIG. 22B show a pile-side hardware 16 ′ of still another embodiment for the pile-side hardware.
This pile side hardware 16 ′ is a rectangular flat washer in which the flange portions 6b of the half members 16d are respectively arranged on the outer surface of each flange portion 6b in the pile side hardware 16 of the embodiment of FIGS. 18 to 20B. 17 is interposed and tightened with a bolt 12. The plate thickness of the rectangular flat washer 17 of the embodiment is twice the plate thickness of the flange portion 6b. The horizontal dimension of the rectangle is about the same as the width of the flange part 6b, and the vertical dimension is about 60% of the vertical dimension of the flange part 6b.

For example, in the case of a pile installed in a place where the four corners of the building or the load-bearing wall are located, it receives a larger pulling force than a pile installed inside the building. Therefore, in the pile foundation structure in such a place, it is necessary to further increase the bonding force between the pile-side hardware and the pile head.
The pile-side hardware 16 ′ of this embodiment is a pile-side hardware having high strength specifications that is suitable for such a case, and is tightened with bolts 12 with a rectangular flat washer 17 having a large vertical and horizontal dimension interposed therebetween. Thus, a large bolt tension can be transmitted to the semi-cylindrical portion 6a via the flange portion 6b. Thereby, the contact | adhesion power of the semicylindrical part 6a and a pile outer surface can further be strengthened, the frictional force of the semicylindrical part 6a and a pile outer surface can be increased, and joining force can be increased.
In addition, when the bolt 12 is strongly tightened without interposing the rectangular flat washer 17, for example, in the case of the flange portion 6b having a plate thickness of about 6 mm, the flange portion 6b is inclined from the root due to the pulling force, which is high. It may also occur that the bolt tension is not transmitted to the semi-cylindrical portion 6a. However, by attaching a rectangular flat washer 17 having a large area with a thick plate to the flange portion 6b and tightening it with bolts, the rigidity of the flange portion 6b is substantially increased, and the flange portion 6b is not tilted by the pulling force. Bolt tension is transmitted to the semi-cylindrical portion 6a. Therefore, the adhesion force between the semicylindrical portion 6a and the outer surface of the pile can be strengthened, the frictional force between the semicylindrical portion 6a and the outer surface of the pile can be increased, and the joining force can be increased.

FIG. 23A, FIG. 23B, FIG. 24A, and FIG. 24B show a pile-side hardware 16 ″ of still another embodiment of the pile-side hardware.
The pile side hardware 16 ″ of this embodiment is a high strength specification pile side hardware similar to the pile side hardware 16 ′, and is applied to, for example, a pile installed at a location where the four corners of the building or the load bearing walls are located. And suitable.
The pile-side hardware 16 ″ of this embodiment has horizontal reinforcing ribs 18 at the upper and lower positions of the outer surface of the flange portion 6d on both sides of each half member 16d ″, and the outer surface of the flange portion 6b and the end of the semi-cylindrical portion 6a. It is fixed in such a manner that it is welded to the outer surface in the vicinity of the part.
In the case of the pile-side hardware 16 ″ of this embodiment, not by simply welding and fixing to the outer surface of the flange portion 6b at the vertical position of the flange portion 6b, but also by welding and fixing to the outer surface in the vicinity of the end portion of the semi-cylindrical portion 6a. Therefore, the rigidity of the flange portion 6b is substantially increased, and even when the bolt 12 is strongly tightened, the flange portion 6b is not tilted by the pulling force, and a large bolt tension is applied through the flange portion 6b. This can be transmitted to the cylindrical portion 6a, thereby further increasing the adhesion between the semi-cylindrical portion 6a and the outer surface of the pile, increasing the frictional force between the semi-cylindrical portion 6a and the outer surface of the pile, and increasing the joining force. Can do.

The present invention is suitably used for a pile foundation structure having a structure equal to or lower than a house.

1, 31 Pile foundation structure 2, 32 Joint metal 3 Pile 3a (made of steel pipe) Pile head 4, 4 ' Base 4a Groove 4c Hole 4d' Notch 6, 16, 16 ', 16 "Pile side hardware 6a Semi-cylindrical Portion 6b Flange 6c, 16c, 16c ', 16c " Horizontal plate 6d 16d, 16d', 16d" Half member 6e First joint bolt 6e '(threaded to first joint bolt) nut 6f Bolt insertion hole 6h (Passing the first joining bolt) holes 7, 37, 37 ' Base side hardware 7a, 37a Plate-like main body 7b, 37b Second long hole 7c Rib (positioning means)
7d Drift pin insertion hole 8 Position adjusting hardware 8a Plate-shaped main body 8b First long hole 8c Second joint bolt 8c '(screwed to the second joint bolt) Nut 8d (second joint bolt) bolt head 8e Plate leg
9 Height position adjusting means 12 Bolt 13 Nut 17 (Thick plate) rectangular flat washer 18 Reinforcement rib 20 Spacer (Height position adjusting means)
21 Auxiliary Band 22 Drift Pin 37e Round Steel 37f First Rib 37g Second Rib 37h Anchor Bolt Insertion Hole 39 Plate Cover 40 Column 41 Hole Down Hardware 41a Anchor Bolt

Claims (10)

1. It is a pile foundation structure formed by joining a steel pipe pile and a wooden base of its superstructure through a joint hardware consisting of a plurality of hardware,
   The joint hardware includes a pile side hardware to be joined to the head of the pile, a foundation side hardware to be directly joined to the foundation, and the pile side hardware and the foundation side hardware interposed between the pile side hardware and the foundation side hardware. Position adjustment hardware for joining the position adjustment hardware in two horizontal directions of the X-axis direction and the Y-axis direction orthogonal to each other, and adjusting the height position of the base-side hardware With means,
   The pile-side hardware has a pair of halved members having flange portions on both sides of the semi-cylindrical portion and a horizontal plate fixed to the upper part of each semi-cylindrical portion, and a pair of positions fixed vertically to each horizontal plate. A first joining bolt for adjusting hardware joining, sandwiching the pile head from both sides with the pair of halved members, and fastening the flange parts with bolts to join the pile head,
   The position adjusting hardware has two first long holes in the Y-axis direction in which the two first joining bolts of the pile-side hardware are respectively inserted in the plate-shaped main body, and in the Y-axis direction. It is a configuration having two second joining bolts for joining to the base-side hardware fixed vertically with an interval between them,
   The base-side hardware has two second long holes in the X-axis direction into which the two second joining bolts of the position adjusting hardware are respectively inserted in the plate-shaped main body, and a position relative to the base Pile foundation structure, which is a configuration having matching means.
2. The shape of the horizontal plate of the said pile side metal fitting has comprised the substantially fan shape enclosed by the two line segments which become the vertex at the cylinder core side of a semicylindrical part, and extend toward the left-right both sides of a semicylindrical inner surface. Pile foundation structure.
3. The flange portions of the halved members of the pile-side hardware are each 1.5 mm or more thicker than the flange portion plate thickness, and the vertical and horizontal dimensions are the vertical dimensions of the flange portions. The pile foundation structure according to claim 2, wherein the pile foundation structure is fastened with a bolt with a rectangular flat washer that is 50% or more and 70% or more of the lateral dimension.
4. Reinforcing ribs that are horizontal at the upper and lower positions of the outer surfaces of the flange portions on both sides of each half member of the pile-side hardware are fixed in such a manner that they are welded and fixed to the outer surface of the flange portion and the outer surface in the vicinity of the end of the semi-cylindrical portion. The pile foundation structure according to claim 2.
5. As a means for aligning the base-side hardware with respect to the base, a rib inserted into a slit formed on the bottom surface side of the base is fixed vertically on the upper surface of the plate-like main body, and a drift pin hole for alignment with the base The pile foundation structure according to any one of claims 1 to 4, wherein the pile foundation structure is provided.
6. The base-side hardware is provided with a Y-axis direction elongated hole for anchor bolt insertion through which the vicinity of the lower end of the anchor bolt of the hole-down hardware attached to the pillar is passed, and as a means for aligning the base-side hardware with respect to the base, the plate The pile foundation structure according to any one of claims 1 to 4, wherein a round steel inserted into an alignment hole formed on a lower surface side of the base is fixed vertically on an upper surface of the main body.
7. Ribs were fixed to the upper surface of the plate-shaped main body of the base-side hardware on both sides in the X-axis direction and both sides in the Y-axis direction sandwiching the center portion, and a plate-shaped cover for directly placing the base on the ribs was covered. The pile foundation structure according to claim 6.
8. A height position adjusting means for adjusting the height position of the base-side hardware includes a spacer having a desired thickness dimension interposed between the plate-shaped body of the position-adjusting hardware and the plate-shaped body of the base-side hardware. The pile foundation structure according to any one of claims 1 to 7, which is a position adjusting means.
9. The height position adjusting means for adjusting the height position of the base-side hardware is height position adjusting means for adjusting the mounting height position of the pile-side hardware to the pile head. The pile foundation structure according to item 1.
10. The auxiliary belt for prescribing the mounting height position to the pile head of the pile side hardware is wound around and fixed to the outer peripheral surface of the steel pipe so that the upper edge is located at the lower edge of the pile side hardware to be attached, The pile foundation structure according to claim 9.

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