JP6551954B2 - Pile foundation structure - Google Patents

Description

  The present invention relates to a pile foundation structure formed by joining a steel pipe pile and a wooden base of its upper structure via a plurality of metal joint members.

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 is adopted. Then, a base (base beam) 4 is installed on the concrete foundation 51.
However, the concrete foundation 51 requires installation and removal of a formwork, placement and curing of concrete, which is complicated and increases the construction cost and the construction period.
The accuracy also depends on the skill of the worker. For example, if the level of the upper end of the foundation is not ensured, there is a problem that the upper structure is inclined.

From such a thing, as shown to FIG. 25B, directly joining the pile 3 made from a steel pipe and the base 4 of a superstructure via the joining metal goods 62 which consist of several metal goods is performed.
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 construction error in the longitudinal direction (FIG. 26B) occurs, for example, on the order of several tens of mm.
Therefore, in order to omit a concrete foundation and to realize a pile foundation structure in which the pile and the base of the upper structure are joined via a joint metal, 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. And a sheath 51 mounted on the bottom plate 4 and having the horizontal screw 50 installed thereon, a top plate 52 fixed to the sheath 51, and an upper portion installed on the top plate 51 It is a structure having a structure 71 and concrete 6 filled between the sheath pipe 51 and the steel pipe pile 2.
Then, the height position is adjusted by the vertical screw 30, and the horizontal position is adjusted by the horizontal screw 50.

Patent Document 2 is a joint metal product between the steel pipe pile 3 and a support (structure), and will be described with reference to FIGS. A nut 7 communicating with the bolt insertion hole 6a is fixed to the back surface of the bolt 6, and a fixing plate 10a is provided on the receiving portion 10 for supporting the gantry, and a square tubular connection 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 connection block 4 and extends in a direction orthogonal to the longitudinal direction of the first elongated hole 12 at four corners of the upper surface plate 4b. The long holes 16 are formed, and the bolt insertion holes 6a of the pile head surface 6 and the first long holes 12 of the lower surface plate 4a, and the bolt insertion holes 18 provided in the fixing plate 10a of the receiving portion 10 and the upper surface plate 4b Adjust the positional deviation of the two long holes 16 respectively, Is that fixed by Tsu door.
Then, the fastening bolt 13 is screwed through the first long hole 12 provided in the lower surface plate 4a of the connection block 4 by screwing and tightened, and the other 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 Position adjustment is performed by the first elongated holes 12 of the lower surface plate 4a and the second elongated holes 16 of the upper surface plate 4b.

Patent document 1: JP-A-2005-226309 JP 2012-207463

  The joint metal of Patent Document 1 seems to assume a large-sized upper structure, but it is complicated, and is not suitable for use in, for example, the basic structure of a house-like structure.

  In the joint metal of Patent Document 2, the connection block 4 for joining the steel pipe pile 3 and the support is in the shape of a square tube, and it can not be said 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. It is an object of the present invention to provide a pile foundation structure which is easy to adjust position for absorbing construction errors of piles.

One aspect of the present invention for solving the above-mentioned problems is a pile foundation structure formed by joining a steel pipe pile and a wooden base of the upper structure thereof via a joint metal object made of a plurality of metal objects,
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. Height adjustment for adjusting the height position of the above-mentioned base-side hardware, and an alignment metal for adjustably joining in two horizontal directions of X-axis direction and Y-axis direction orthogonal to each other. Equipped with
The pile side hardware has a flange portion on both sides of the semi-cylindrical portion and a pair of half members fixed to the upper portion on the inner surface side of each semi-cylindrical portion, and a pair position vertically fixed 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 flanges with bolts to join the pile head,
The position adjusting metal has two first long holes long in the Y axis direction into which the two first joining bolts of the pile side metal are inserted in the plate-like main body, and in the Y axis direction. It has a configuration having two second joining bolts for opposite side base metal joining which are vertically fixed at intervals,
The base-side hardware has, in its plate-like main body, two second elongated holes elongated in the X-axis direction into which the two second bonding bolts of the position adjustment hardware are respectively inserted, and a position relative to the base It is a pile foundation structure which is a structure which has a matching means.

  In the above-described pile foundation structure, the shape of the horizontal plate of the above-mentioned pile-side metal has a substantially fan-like shape in which the cylinder core side of the semi-cylindrical portion becomes a vertex and is surrounded by two line segments extending toward the left and right sides of the semi-cylindrical inner surface Also good.

  In the above pile foundation structure, the flanges of the respective half members of the above pile side hardware are disposed on the outer surface of each flange at a thickness of 1.5 times or more the thickness of the flange thickness, It may be tightened with a bolt by interposing a rectangular flat washer which is 50% or more of the longitudinal dimension of the flange portion and 70% or more of the transverse 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 the manner which

  In the above pile foundation structure, a rib inserted in a slit formed on the lower surface side of the base is vertically fixed on the upper surface of the plate-like main body as an alignment means for the base side metal object to the base Drift pin holes 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 the alignment means, a round steel inserted into an alignment hole formed on the lower surface side of the base may be vertically fixed to the upper surface of the plate-like 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 Cover may be provided.

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

  In the above 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 and fixed to the surface.

  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 shortened significantly and the construction cost can be suppressed.

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. Can be absorbed easily, and there are few cases where pile construction errors due to workers' skills become a problem.
In addition, in the joint metal installation work for mounting the joint metal work, the work of mounting the pile side metal on the pile head, mounting the position adjustment metal on it, and mounting the base side metal on it is all called bolt and nut tightening operation It can be done by simple work, and its workability is good.
In addition, the pile-side hardware has a simple structure in which a pair of half members having a horizontal plate with the first bonding bolt fixed at the upper end is pinched from both sides to the pile head and bolted and tightened to fix it to the pile head By this simple structure, the horizontal Y-axis position adjusting means of the adjusting metal having the first elongated hole is realized.

  According to the pile-side hardware 16 of claim 2, the horizontal plate 16c has a fan-like shape, and there is no joint portion with the portion near the flange portion 6b on both sides of the semi-cylindrical portion 6a. Unlike the case of the above, the horizontal plate 16c does not restrain the vicinity of both ends of the semi-cylindrical portion 6a (near the left and right flange portions 6b). Therefore, when the opposing flange portions 6b are tightened with the bolt 12 and the nut 13, the vicinity of the left and right end portions of the semicylindrical portion 6a can be flexibly bent, and the entire semicylindrical portion 6a is strongly adhered to the outer surface of the pile It is possible to generate a large frictional force and secure a sufficiently high bonding strength.

  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. As a result, the adhesion between the semi-cylindrical portion 6a and the outer surface of the pile can be further strengthened, and the frictional force between the semi-cylindrical portion 6a and the outer surface of the pile can be increased to increase the bonding force.

  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 adjustment means which adjusts a height position can be employ | adopted, the height position adjustment means which does not become complicated either is implement | achieved.
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. It can be attached.

  In the case of a beam connection type in which only a pile and a base (base beam) are joined, vertical ribs may be fixed to the upper surface of the plate-like main body of the base-side hardware as in claim 5. 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 lower surface of the base, alignment between the base side metal and the base is possible, but this configuration is based on the hole down hardware attached to the column. And when it joins.
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 beam joint type and the column-beam joint type only by replacing the base-side hardware.

FIG. 1 shows a pile foundation structure of an embodiment of the present invention (in the case of a beam connection type in which only a pile and a base (base beam) are joined) before the base is joined to the joint metal. FIG. FIG. 2 is a side view as seen from the side (front side) opposite to the X-axis direction of FIG. FIG. 3 is a side view (= left side view of FIG. 2) viewed from the Y-axis direction of FIG. FIG. 4 is an exploded perspective view of FIG. FIG. 5A is a plan view of FIG. 2 (= the plan view of FIG. 1). FIG. 5B is a plan view of the base-side hardware in FIG. 5A removed. FIG. 5C is a plan view of the position adjustment hardware in FIG. 5B removed. FIG. 6 is a view showing a state in which a wooden base (base beam) is installed on the joint metal in FIG. 2, but only a part of the base is shown in cross section. FIG. 7 is a view (= left side view of FIG. 6) showing a wooden base (base beam) installed on the metal joint in FIG. 3, but only a part of the base is shown in cross section. FIG. 8A is a plan view for explaining the use of the auxiliary belt for defining the mounting height position of the pile-side hardware on the pile head. FIG. 8B is a side view explaining the use aspect of the auxiliary belt for defining the attachment height position to the pile head of a pile side metal fitting. 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 as viewed from the side (front side) opposite to the X-axis direction of FIG. 11 is a side view seen from the Y-axis direction of FIG. 9 (= the left side view of FIG. 10). FIG. 12 is an exploded perspective view of FIG. FIG. 13A is a plan view of FIG. 10 (= the plan view of FIG. 9) (a base and a column are shown by a two-dot chain line). FIG. 13B is a plan view of the base-side hardware in FIG. 13A as viewed from the bottom (the base and the columns are indicated by a two-dot chain line). FIG. 13C is a plan view of the position adjustment hardware in FIG. 13B removed and seen (a base and a column are shown by a two-dot chain line). FIG. 14 is a view showing only the base-side hardware except for the pile-side hardware and the position adjustment hardware in FIG. 13A (the base and the column are shown by a two-dot chain line). FIG. 15 is a view showing a state where a base and a column are installed on the metal joint in FIG. FIG. 16 is a view showing a base and a column installed on the metal joint in FIG. FIG. 17A shows another embodiment of the base-side metal 37 in the joint metal 31 shown in FIGS. 9 to 16 and is a view corresponding to the portion of the position adjustment metal and the base-side metal 7 in FIG. FIG. 17B shows another embodiment of the base-side metal 37 in the metal joint 31 shown in FIG. 9 to FIG. 16, corresponding to FIG. FIG. 18 is a view for explaining the pile-side metal 16 of another embodiment of the pile-side metal in each of the embodiments described above, and is a perspective view shown in FIG. 4 excluding the portions of the position adjustment metal 8 and the base-side metal 7 It is a figure corresponded 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 6 e is not shown). FIG. 19B is a plan view showing a state in which the pile side hardware 16 is bolted to a pile head. FIG. 20A is a front view of FIG. 19B. FIG. 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 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 in which a thick rectangular washer is added to the pile side hardware 16 of the embodiment shown in FIGS. 18 to 20B, and corresponds to FIG. 19B. FIG. FIG. 22A is a front view of FIG. 21B. FIG. 22B is a left side view of FIG. 22A. FIG. 23A is a view corresponding to FIG. 19A, showing a pile-side hardware 16 ′ ′ according to still another embodiment. FIG. 23B is a view corresponding to FIG. 19B, showing a pile-side hardware 16 ′ ′ according to still another embodiment. FIG. 24A is a front view of FIG. 23B. FIG. 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 contrasts and explains with a pile foundation structure (Drawing 25B) joined directly via. 25A and 25B show a joint foundation comprising a pile foundation structure (FIG. 25A) in which the base of the upper structure is installed on a concrete foundation constructed on a steel pipe pile, and a base of the steel pipe pile and the upper structure It is a figure which contrasts and explains with a pile foundation structure (Drawing 25B) joined directly via. FIG. 26A is a diagram for explaining a construction error that occurs during pile construction. FIG. 26B is a diagram for explaining a construction error that occurs 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 in the case of a beam connection type in which only a pile and a base (base beam) are connected or in the case of a column-beam connection type in which a pile and a column and a base (base beam) are connected. It can 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 connection type in which a pile and a base (base beam) are only 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 (front side) opposite to the Y-axis direction, and FIG. 4 is an exploded perspective view of FIG.
As shown in these figures, the pile foundation structure 1 is a pile foundation structure formed by joining a steel pipe pile 3 and a wood foundation 4 of the upper structure thereof to be described later via 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 fitting 8 for adjustably joining the pile-side fitting 6 and the base-side fitting 7 in two directions, X-axis direction and Y-axis direction orthogonal to each other, is provided, and the height of the base-side fitting is high. Height position adjustment means are provided to adjust the height position. The height position adjusting means in this embodiment is a spacer 20 described later.

 The coupling relationship between the pile side hardware 6 and the position adjustment hardware 8 and the coupling relationship between the position adjustment hardware 8 and the base side hardware 7 are additionally shown in FIGS. 5A, 5B, and 5C. 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 portion 6b on both sides of the semi-cylindrical portion 6a, and a band-shaped half-cut made of a pair of flexible metal plates on which the horizontal plate 6c is fixed at the upper portion on the inner surface of each semi-cylindrical portion. A member 6d and a first joining bolt 6e (for joining with a position adjustment metal) which is vertically fixed to each horizontal plate 6c are provided. 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 the part 3a.

The position adjustment hardware 8 has, in a rectangular plate-like main body 8a, two first long holes 8b long in the Y-axis direction into which the two first joining bolts 6e of the pile side hardware 6 are inserted, 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 to the first joint bolt 6e is indicated by 6e '.
The second joint bolt 8c is inserted into the hole formed in the plate-like main body 8a, and the bolt head 8d on the lower surface side of the plate-like main body 8a is fixed by welding so that the bolt 8c does not fall off. (The tacking fixed degree by spot welding may be sufficient).
In the illustrated example, plate-like legs 8e for providing a space for crossing the bolt heads 8d are provided on the lower surface of the plate-like main body 8a.

  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 an alignment means with respect to a base in the upper surface. The rib (alignment means) 7 c has a drift pin insertion hole 7 d for aligning with the base 4, and is vertically fixed to the plate-like main body 7 a. A nut to be screwed to the second joint bolt 8c is indicated by 8c '.

  In FIG. 2 and FIG. 3, reference numeral 20 designates a spacer interposed between the plate-like main body 7a of the base-side hardware 7 and the plate-like main body 8a of the position adjustment hardware 8 as height position adjusting means of the base-side hardware 7. In that case is the spacer.

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 have been placed, the metal joint 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. It fixes 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 the bolt 6e (do not fully tighten the nut 6e 'at this stage).
Next, the base-side metal 7 is placed on the position-adjusting metal 8 such that the second bonding bolt 8c of the position-adjusting metal 8 is inserted into the second elongated hole 7b, and the nut 8c 'is placed on the second bonding bolt. Screw on 8c (do not fully tighten the nut 8c 'at this stage).
At this stage, the position adjustment hardware 8 and the base side hardware 7 are assembled on the pile side 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.

The position adjustment in the Y-axis direction moves and adjusts the position adjustment hardware 8 with respect to the pile-side hardware 6 in the Y-axis direction. 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. It can be adjusted.
The position adjustment in the X-axis direction moves and adjusts the base-side hardware 7 in the X-axis direction with respect to the position-adjusting hardware 8. 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. It 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 of various thicknesses can be prepared and appropriately selected to have predetermined thickness dimensions.
The illustrated spacer 20 is U-shaped in plan view as shown in FIG. 5B, but a bolt or the like existing between the plate-like main body 8a of the position adjustment metal 8 and the plate-like main body 7a of the base side metal 7 The shape should not interfere with the nut. Further, the plate-like main body 8a of the position adjustment metal 8 and the plate-like main body 7a of the base-side metal 7 are horizontal, such as a plurality of members arranged sideways so as not to interfere with bolts and nuts. 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. In the illustrated example, the auxiliary belt 21 passes the other end through the buckle 21a at one end, and squeezes the other end to clamp and fix it.
In this case, after the auxiliary belt 21 is wound and fixed on the outer periphery of the pile 3 so that the upper end edge 21b is positioned at the lower end edge 6g of the pile side metal 6 to be attached, the pile side metal 6 is The lower end edge 6g is positioned so as to abut the upper end edge 21b of the auxiliary belt 21, and then fixed to the pile head 3a.
As this auxiliary belt 21, although what is called a so-called power pole band can be used, it may not necessarily be a metal band, and may not have flexibility. What is necessary is just to be able to position the lower end edge 6g of the pile-side hardware 6.

After the metal joint 2 is correctly positioned and attached to the head 3 a of each pile 3 as described above, the base 4 of the upper structure is installed on the metal joint 2 as shown in FIGS. 6 and 7. .
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 enter 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 a through hole but is open 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. It is inserted in and.

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

Further, the joint metal 2 is operated by moving and adjusting the position adjusting metal 8 in the Y axis direction with respect to the pile side metal 6 and by moving and adjusting the base side metal 7 in the X axis direction with respect to the position adjusting metal 8. 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 construction error of the pile construction can be easily absorbed, and the pile construction error due to the skill of the worker is less likely to be a problem.
Further, the position adjustment operation can be performed by a simple operation such as bolt and 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 before the base is joined to the metal joint 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 as viewed from the opposite side (front side) to the X axis direction, FIG. 11 is a side view of the pile foundation structure 31 of 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 fitting 8 for adjustably joining the pile-side fitting 6 and the base-side fitting 37 in two horizontal directions, the X-axis direction and the Y-axis direction orthogonal to each other, and the height of the base-side fitting Height position adjustment means are provided to adjust the height position. The height position adjustment means of 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 shown supplementarily 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 pillars 40 in FIG. 13A.
This embodiment is a pile foundation structure of beam-to-column connection type in corner column, and in FIG. 13A to FIG. 16 where the foundation 4 and the pillar 35 are illustrated, the foundation extending in the X axis direction is simply indicated by reference numeral 4 A base extending in the orthogonal Y-axis direction is indicated 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 common to the pile foundation 1 of the embodiment 1 which is a case of the beam connection type, and the foundation-side hardware 37 is different. .

The base-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 vertically fixes the round steel 37e for alignment with the base 4 at the center position of the upper surface of the plate-like main body 37a, and its ends at the X-axis direction both ends of the plate-like main body 37a. The first rib 37f extending along the edge (in the Y-axis direction) is fixed, and the second rib 37g in a mode of abutting between the first ribs 37f on both sides in the Y-axis direction sandwiching the round steel 37e is fixed. Further, Y-axis direction long holes 37h for inserting an anchor bolt through which the lower end vicinity of the anchor bolt 41a of the hole-down metal 41 is inserted are provided respectively inside the first ribs 37f on both sides of the plate-like main body 37a.
The ribs 37f and 37g on the upper surface of the plate-like main body 37a may not be provided as in 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, for the second joining at the lower part of the end of the bases 4 ' It is preferable to form a notch 4d 'that does not interfere with the bolt 8c and the nut 8c'. The notch 4d 'can be a notch that pierces in the base width direction, or a notch having only the bolt 8c and the nut 8c'.

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 pillar 40 is joined to the base 4 by passing through the Y-axis direction elongated hole 37 h for inserting the anchor bolt 37 and the nut 43 screwed to the lower end portion thereof. 41 d is a nut screwed on the top of the anchor bolt 41 a.
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-like cover 39 for direct reception is mounted.

The construction procedure for constructing the pile foundation structure 31 will be described.
The work of attaching the pile side hardware 6 to the head 3 a of the pile 3 and attaching the position adjustment metal 8 on the pile side hardware 6 is the same as that of the pile foundation structure 1 of the first embodiment.
Further, the operation of attaching the base-side metal 37 on the position adjustment metal 8 is also the same as that of the first embodiment. That is, the base metal 37 is placed on the position adjusting metal 8 such that the second bonding bolt 8c of the position adjusting metal 8 is inserted into the second elongated hole 37b, and the nut 8c 'is placed on the second bonding bolt Screw on 8c (do not tighten the nut 8c 'at this stage yet).

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 operation is also the same as in the first embodiment, and the position adjustment metal 8 is moved and adjusted in the Y-axis direction along the first elongated hole 8b of the position adjustment metal 8 with respect to the pile side metal 6, The side metal piece 37 is moved relative to the position adjusting metal piece 8 and the second elongated hole 37b of the base side metal piece 37 is moved and adjusted in the X-axis direction.
The height position adjustment is also the same as the first embodiment, and the spacer 20 of a predetermined thickness dimension is inserted between the plate-like main body 8a of the position adjustment metal 8 and the plate-like main body 37a of the base side metal 37 (Intervene) or adjust the mounting height position of the pile side hardware 6 to the pile head 3a.

After the metal joint 32 is correctly positioned and attached to the head 3 a of each pile 3 as described above, the base 4 of the upper structure is installed on the metal joint 32 as shown in FIGS. 15 and 16. .
In this case, the base 4 is placed on the base-side metal 37 such that the round steel 37 e of the base-side metal 37 is inserted into the holes 4 c 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 thereof is screwed. Tighten the column 40 to the base 4.
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 beam-to-column connection type, various effects similar to those of the first embodiment can be obtained.
Also, as described above, according to the pile foundation structure of the present invention, the foundation-side hardware is replaced in the case of the beam connection type (pile foundation structure 1) and in the case of the column-beam connection type (pile foundation structure 31) It is possible to cope only with (7 and 37).

The pile side metal object 16 of the other Example about the pile side metal material in each Example mentioned above at FIGS. 18-20 B is shown. FIG. 18 is a perspective view corresponding to the view of FIG. 4 excluding the portions of the position adjustment metal 8 and the base side metal 7. FIG. 19A is a perspective view showing a state immediately before the pile-side metal 16 in FIG. 18 is joined to the pile head with a bolt (however, the hole 6h for passing the first joining bolt 6e is shown and the first joining bolt 6e is shown 19B is a plan view showing a state in which the pile-side metal work 16 is bolted to the pile head by itself. 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 of a half member with the pile-side hardware 6 of the embodiment shown in FIGS. 1 to 7 (hereinafter also referred to as FIG. 1 etc.) 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 in plan view of the horizontal plate 6c in the embodiment of FIG. 1 etc. is a half-moon shape consisting 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 cylinder core side of the semi-cylindrical portion 6a is a vertex, and has a fan shape surrounded by two straight lines 16ck extending toward the left and right sides of the inner surface of the semi-cylinder. The horizontal plate 6c in the illustrated example has a sector shape with a central angle θ of 120 °. That is, it is a fan shape which cut 30 degrees (angle (alpha)) of the both sides of the linear part of half-moon shaped horizontal plate 6c of FIG. 1 grade | etc.,.
Therefore, in this horizontal plate 16c, the semicircular arc part becomes short compared to the horizontal plate 6c in FIG. 1 etc., and there is no weld joint with the part near the flange 6b on both sides of the semicylindrical part 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 Two sandwiching semi-cylindrical portions 6a are in close contact with the outer surface of the pile. In order to exert a predetermined frictional force, it is necessary for the semi-cylindrical portion 6a and the outer surface of the pile to be sufficiently in close contact.
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 above, the horizontal plate 16c does not restrain the vicinity of both ends of the semicylindrical portion 6a (near 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 secure a sufficiently high bonding strength.
The relationship between the generated stress and the deformation of the horizontal plate when the tensile strength of the required performance value was given to the first joint bolt 6e was investigated by FEM analysis for the two cases of the semicircular shape and the fan shape. It has been found that the stress is held within the elastic limit and no residual deformation occurs. Therefore, it can be said that there is no adverse effect from changing from half moon shape to fan shape.

FIG. 21A, FIG. 21B, FIG. 22A, and FIG. 22B show still another embodiment of the pile-side hardware 16 'for the pile-side hardware.
This pile side hardware 16 'is a rectangular flat washer in which the flange portions 6b of the respective 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 6 b. The horizontal dimension of the rectangle is about the same as the width of the flange 6b, and the vertical dimension is about 60% of the vertical dimension of the flange 6b.

For example, in the case of a pile installed at a corner of a building or a place where a bearing wall is located, a large pulling force is received compared to a pile installed inside the building. Therefore, in the pile foundation structure of such a place, it is necessary to further increase the bonding strength between the pile side hardware and the pile head.
The pile-side hardware 16 'of this embodiment is a high-strength pile-side hardware suitable for such a case, and is tightened with a bolt 12 with a thick flat washer 17 interposed therebetween in a thick plate. Thus, a large bolt tension can be transmitted to the semi-cylindrical portion 6a via the flange portion 6b. As a result, the adhesion between the semi-cylindrical portion 6a and the outer surface of the pile can be further strengthened, the frictional force between the semi-cylindrical portion 6a and the outer surface of the pile can be increased, and the 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. The bolt tension is transmitted to the semi-cylindrical portion 6a. Therefore, the adhesion between the semi-cylindrical portion 6a and the outer surface of the pile can be strengthened, the frictional force between the semi-cylindrical 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 still another embodiment of the pile-side hardware 16 '' of the pile-side hardware.
The pile-side hardware 16 ′ ′ of this embodiment is a pile-side hardware of high strength specifications like the above-mentioned pile-side hardware 16 ′, and is applied to, for example, a pile installed at four corners of a building or a location where bearing walls are located. Preferred.
In the pile-side hardware 16 ′ ′ of this embodiment, reinforcing ribs 18 respectively horizontal to the upper and lower positions of the outer surface of the flange portion 6d on both sides of each half-divided member 16d ′ ′ are the outer surface of the flange portion 6b 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, welding is fixed to the outer surface in the vicinity of the end of the semi-cylindrical portion 6a instead of simply fixed to the outer surface of the flange 6b at the upper and lower positions of the flange 6b. 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.

  The present invention is suitably used for a pile foundation structure below a residential structure.

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 (through the first joint bolt) holes 7, 37, 37 'foundation side hardware 7a, 37a plate-like main body 7b, 37b second long hole 7c rib (alignment 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-like leg
9 Height position adjustment means 12 Bolt 13 Nut 17 (Thick board) rectangular flat washer 18 Reinforcement rib 20 Spacer (height position adjustment means)
21 Auxiliary band 22 Drift pin 37 e Round steel 37 f First rib 37 g Second rib 37 h Anchor bolt insertion hole 39 Plate-like cover 40 Column 41 Hole down hardware 41 a Anchor bolt

Claims (10)

A pile foundation structure formed by joining a steel pipe pile and a wooden base of its upper structure through a metal joint consisting of a plurality of hardware,
The joint hardware includes a pile-side hardware that joins with the head of the pile, a base-side hardware that directly joins the base, and the pile-side hardware and the base-side hardware by being interposed between the pile-side hardware and the base-side hardware. Height adjustment for adjusting the height position of the base-side hardware, and a position adjustment metal for positionably joining in two directions, the X axis direction and the Y axis direction, which are orthogonal to each other. Equipped with
The pile side hardware has a flange portion on both sides of the semi-cylindrical portion and a pair of half members having a horizontal plate fixed to an upper portion on the inner surface side of each half cylinder, and a pair position vertically fixed 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 adjustment metal has two first elongated holes long in the Y-axis direction in which the two first joining bolts of the pile-side metal are respectively inserted in the plate-like main body, and in the Y-axis direction It has a configuration having two second joining bolts for opposite side base metal joining which are vertically fixed at intervals,
The base-side hardware has, in its plate-like main body, two second elongated holes elongated in the X-axis direction into which the two second bonding bolts of the position adjustment hardware are respectively inserted, and a position relative to the base Pile foundation structure which is a configuration having a matching means.   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.   The plate thickness at which the flanges of each half of the pile-side hardware are arranged on the outer surface of each flange is 1.5 or more times thicker than the plate thickness of the flange, and the vertical and horizontal dimensions are the longitudinal dimensions of the flange The pile foundation structure according to claim 2, which is bolted by interposing a rectangular flat washer which is 50% or more and 70% or more of the lateral dimension.   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.   A rib inserted in a slit formed on the lower surface side of the base is vertically fixed on the upper surface of the plate-like main body as alignment means for the base side hardware to the base, 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 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 the plate as an alignment means for the base-side hardware with respect to the base The pile foundation structure according to any one of claims 1 to 4, wherein a round steel inserted into an alignment hole formed on the lower surface side of the base is vertically fixed on the upper surface of the main body.   A rib is fixed on the upper surface of the plate-like main body of the base-side hardware on both sides in the X-axis direction and the Y-axis direction sandwiching the central portion, and a plate-like cover for placing the base directly on the rib is covered. The pile foundation structure according to claim 6.   The height position adjustment means for adjusting the height position of the base side hardware is a height by interposing a spacer of a desired thickness dimension between the plate-like main body of the position adjustment metal and the plate-like main 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.   The height position adjustment means which adjusts the height position of the said foundation side metal article is a height position adjustment means which adjusts the attachment height position to the pile head of the said pile side metal article, Pile foundation structure described in 1 above.   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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