JP5866733B2 - Pile-free welded joint - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a non-welded joint for piles that connect piles joined together in the axial direction without welding when precast concrete piles or other piles are built into the ground.

  In general, when building ready-made piles in the ground, it is common to build precast concrete piles of a predetermined length to the desired depth while connecting them in the length direction as necessary. As for the connection between the piles, a method of connecting the metal end plates integrated with the end face of the precast concrete pile by welding is performed.

  However, in this connection method by welding, the connection strength depends on the quality of welding and requires a high degree of skill, but recently there is a shortage of skilled engineers, and the pile connection work is an outdoor work at the pile driving site. Therefore, there is a problem that it depends on the weather.

  For this reason, non-welding joints that do not rely on welding have been developed in recent years. In this conventional non-welded joint, as shown in FIG. 12, a cylinder fitted over the outer periphery of both ends 1, 2 of both piles 1, 1 to be connected to each other in the radial direction. A plurality of split arc-shaped plates 3 are provided, and flange-shaped ridges 5 and 5 projecting from the outer peripheral surfaces of both end fittings 2 and 2 are fitted into the concave grooves 4 formed on the inner peripheral surface of the arc-shaped plate 3. In addition, a method for fixing the arc-shaped plate 3 to the both end fittings 2 and 2 with bolts 6 has been developed (for example, Patent Document 1).

  Further, as a method for fixing the arc-shaped plate described above, a dovetail is vertically divided on the outer periphery of the end of the arc-shaped plate 3 mounted across the end fittings 2 and 2 of both piles 1 and 1, as shown in FIG. The arc-shaped interplate connecting projections 3a, 3a are formed, and the plate-shaped arc-shaped interplate connecting fitting 5 having the tapered dovetail groove 4 fitted into the dovetail shape is used. There has been developed a structure in which the arcuate plates 3 and 3 are connected to each other by sliding the arcuate plate-to-plate connecting fitting 5 by fitting the connecting projections 3a and 3a (Patent Document 2).

JP 2003-82656 A JP2011-89302A

  In such a conventional unwelded joint for piles, the unwelded joint having the structure shown in FIG. 12 described above has a large number of bolts because the arc plate is bolted to the upper and lower end fittings. There was a problem that a lot of work was required for the work.

  In addition, it is necessary to form a large number of screw holes in the pile end fitting in advance, and in order to protect this, a hole-filling bolt having a square hole for tool fitting is attached to the end face, and in this state the concrete However, because it is in a harsh environment for screw holes and hole filling bolts, some hole filling bolts cannot be removed and the entire pile may have to be discarded. There was a problem.

  As shown in FIG. 13, in the method of connecting the arc-shaped plates with the plate-shaped arc-shaped plate connecting metal fitting, when a large bending moment acts on the joint portion, the connecting metal fitting may be deformed and orthogonal to the axial direction. There was a problem that the shear strength in the direction was smaller than that of the pile body.

  Thus, in view of the conventional problems, the present invention uses a small number of members, is low in cost, has good workability, and has a high connection strength with high resistance to bending force and shearing force. It was made for the purpose of providing a non-welded joint.

The feature of the invention according to claim 1 for solving the conventional problems as described above is that each joint end of each pile to be connected to each other is provided with an end fitting, and straddling the both end fittings. comprising a plurality of arcuate plates which are fitted in place wrapped around the outer periphery thereof, ridges of said end portions fitting into the inner peripheral surface of the arcuate plate provided with a flange-like projections integrally with the outer periphery of the end portions fitting fitted The concave groove has a tapered shape with a wide opening on the opening side, and the convex strip has a tapered shape with the cross section of the concave groove being overlapped with the metal fittings at both ends. Of the piles that are connected to each other by fitting the ridges of the end fittings into the grooves and fitting the arcuate plates to the outer peripheries of the both end fittings. In non-welded joints, A circular ring-shaped shearing ring interposed between the joint surfaces to which the both end fittings are joined to each other is provided, and the shear ring has a groove opening formed on the groove bottom side formed on the joining surface of the end fitting. The arcuate plate is formed in a taper shape that fits into a shear ring fitting portion made of a concave groove having a narrower taper width than the side, and is fixed across the outer surface of the ends of the arcuate plates adjacent to each other. A plate-shaped arc-shaped plate-to-plate connecting bracket that connects between them, and the arc-shaped plate-to-plate connecting bracket includes a tapered dovetail having a narrow tapered shape on either the upper or lower side and a dovetail-shaped cross section, and The outer surface of each end of the adjacent arc-shaped plates is provided with projections for connecting between the arc-shaped plates, each having a tapered dovetail shape that fits into the tapered dovetail groove. Between arcuate plates adjacent to each other by inserting the sintered projections on the tapered dovetail is connected by the arc-shaped plate between the connecting fitting and screwed into arcuate plates adjacent the ends of the arcuate plate between connecting fitting There is.

The invention according to claim 2 is characterized in that, in addition to the structure of claim 1, a circular ring-shaped concave groove formed concentrically with the joint surface is formed on each joint surface of both end fittings joined to each other. A shear ring fitting portion is provided, and the shear ring is fitted across the shear ring fitting portion of the metal fittings at both ends, and each shear ring fitting portion of the metal fittings at both ends is arranged at the groove bottom side of the groove. The inner and outer peripheral surfaces of the shear ring are formed in a tapered shape whose upper and lower sides correspond to the respective shear ring fitting portions .

According to a third aspect of the present invention, in addition to the configuration of the first aspect , a corner portion between the inner peripheral surface of the opening formed with the shear ring fitting portion at the center of the joint surface of both end fittings and the joint surface is provided. This is because it is formed in an annular shape that has been cut into a step shape.

According to a fourth aspect of the present invention, in addition to the configuration of the third aspect, the shear ring fitting portion is formed in a tapered shape having a larger diameter on the joining surface side of the end fitting, and the outer peripheral surface of the shear ring is formed. The upper and lower sides are formed in a reverse tapered shape that matches the tapered shape of the shear ring fitting portion of the joint surface .

  According to a fifth aspect of the present invention, in addition to the structure of the first aspect, the shear ring is integrally projected on one side of the both end fittings, and the cross section has a narrow base on the projecting end side. It is formed in a shape, and the shear ring is fitted on the other side of the both end fittings with a shear ring fitting portion formed in a shape corresponding to a trapezoidal shape of the shear ring integrated with the end fitting.

Oite the present invention is provided with a respective end fitting to the joint end of each stake to be connected to each other, comprising a plurality of arcuate plates which are fitted in place wrapped around the outer periphery thereof by straddle opposite ends thereof fitting In addition, a flange-shaped protrusion is integrally provided on the outer periphery of the metal fittings at both ends , and a groove is provided on the inner peripheral surface of the arc-shaped plate, and the protrusions of the metal fittings on both ends are fitted into the groove. In the non-welded joint of the structure where the piles are connected by fitting and fixing the arcuate plate to the outer periphery of the both end fittings,

  A plate-shaped arc-shaped plate-to-plate connecting bracket for connecting the arc-shaped plates adjacent to each other is provided, and the arc-shaped plate-to-plate connecting bracket has a narrow tapered shape on either the upper or lower side, and a taper having a dovetail-shaped cross section. Protrusions for connecting between arc-shaped plates each having a dovetail groove, each of which is formed by vertically dividing a tapered dovetail shape that fits into the tapered dovetail groove, is provided on each outer surface of each end of the arc-shaped plates adjacent to each other. By inserting the projections for connecting the arc-shaped plates into the tapered dovetail groove, the arc-shaped plates adjacent to each other are connected by the metal fittings for connecting the arc-shaped plates, so that many screwing operations as in the prior art are unnecessary. In addition, since the member is light, workability is good and the piles can be connected in a short time.

In the present invention, since both ends of the arc-shaped plate-to-plate connecting bracket are screwed to the arc-shaped plate, when a force in the bending direction is applied to the connecting portion of the pile, the arc-shaped plates are separated from each other. Force is generated, and both ends of the arc-shaped plate connecting bracket are bent outward, but the lifting at that time is prevented by screwing, eliminating the need to increase the bending strength of the arc-shaped plate connecting bracket. It can be made thin, lightweight and easy to handle, and the protrusion height to the outer periphery of the pile can be made small.

In the present invention, by providing a circular ring-shaped shear ring interposed between the joint surfaces where the both end metal parts are joined to each other, the axial part is perpendicular to the joint part between the piles. The shear resistance in the direction is increased, and the shear resistance is high.

In the present invention, each joint surface of both end fittings to be joined to each other is provided with a shear ring fitting portion formed by a circular ring-shaped concave groove formed concentrically with the joint surface, and the shear ring of the both end fittings with combined structure fitted to the shear ring by straddle the fitting portion, by cutting using a lathe for shearing the ring fitting portion of the formation is disk-shaped end fitting, also the formation of the shear ring against a circular ring material It can be easily machined by cutting with a lathe.

In the present invention, each shear ring fitting portion of the metal fittings at both ends is formed in a tapered shape in which the groove bottom side of the concave groove is narrower than the groove opening side, and the inner and outer peripheral surfaces of the shear ring are vertically By forming the tapered shape corresponding to each of the shear ring fitting portions, when joining the end brackets of the upper and lower piles, the taper groove of the both end brackets and the tapered shape of the shear ring, Centering is done automatically, and high-precision joining between piles becomes easy.

In the present invention, by forming a shear ring fitting portion in the center of the joint surface of the metal fittings at both ends and forming an annular shape in which the corner portion between the inner peripheral surface of the opening and the joint surface is scraped off stepwise, It becomes easy to form a shear ring fitting portion with respect to the metal part.

In the present invention, the shear ring fitting portion is formed in a taper shape having a larger diameter on the joining surface side of the end fitting, and the upper and lower sides of the outer peripheral surface of the shear ring are tapered in the shear ring fitting portion of each joining surface. By forming the taper in the opposite reverse direction, centering between the two piles is automatically performed by the tapered groove of the end fitting and the tapered shape of the shear ring, and high-precision joining between the piles is facilitated. .

Oite the present invention, the shear ring, said projecting integrally on one side of both end portions fitting to form a cross-section projecting end side and trapezoidal in narrow, the both end portions fitting the shear ring On the other side, a shear ring is formed by molding the end fitting by fitting it to a shear ring fitting portion formed in a shape corresponding to the trapezoid of the shear ring integral with the end fitting. Therefore, the manufacturing process is reduced and the cost is reduced.

It is a cross-sectional view showing an example of a non-welded joint of a pile according to the present invention. It is a partial longitudinal cross-sectional view same as the above. It is a fragmentary cross-sectional view which shows an arc-shaped plate connection part same as the above. FIG. The arc-shaped plate of a non-welded joint shown in FIG. 1 is shown, (a) is an end view, and (b) is a plan view of the end. The arc-plate connecting metal fittings of the weldingless joint shown in FIG. 1 are shown, (a) is a front view and (b) is a plan view. (a) and (b) are the fragmentary sectional views which show the shear ring insertion part and shear ring part of a pile joining process. It is a fragmentary sectional view showing other examples of the present invention. It is a fragmentary sectional view showing other examples of the present invention. It is a fragmentary sectional view showing other examples of the present invention. It is a fragmentary sectional view showing other examples of the present invention. It is a longitudinal cross-sectional view which shows an example of the past. It is a fragmentary perspective view which shows the other conventional example.

  Next, embodiments of the present invention will be described based on the examples shown in the drawings. This example shows the case where the non-welded joint of the pile of the present invention is implemented for the connection of a precast concrete pile.

  In the figure, reference numeral 10 is a pile body, 11 is a steel pipe covering the outer periphery of the pile body 10, and 12 is an end fitting integrally provided at an end of the pile body 10.

The end fitting 12 is formed in a circular plate shape, and its outer surface is a joining surface 12c. The steel pipe 11 is directly welded to the back surface of the end fitting 12 and integrated with the pile body 10.

  On the upper and lower joint surfaces 12c, 12c, shear ring fitting portions 30, 30 formed of concave grooves formed in a circular ring shape concentrically with the end fitting 12 are formed at positions facing each other in alignment with each other. A circular ring-shaped shear ring 31 is fitted in an arrangement straddling the shear ring fitting portions 30, 30.

  Each shear ring fitting part 30, 30 is formed in a trapezoidal shape in which the cross section in the pile radial direction is narrower than the groove opening on the groove bottom 30a side, and the shear ring 31 has a cross section in the pile radial direction, A shape in which the trapezoids in opposite directions corresponding to the two shear ring fitting portions 30 and 30 are integrally stacked on the upper and lower sides with respect to the center in the height direction, that is, the upper and lower sides taper from the center in the height direction. It is formed in a taper shape.

  A plurality of torque transmission pin fitting holes 14a and 14a are formed on the joint surfaces 12c and 12c of the end fittings 12 and 12 concentrically with the end plate portion 12a, and the torque transmission pin 14b is fitted thereto. .

A flange-like ridge 13 is integrally formed on the outer periphery of the end of the end fitting 12 . As shown in FIG. 2, the protrusion 13 of each end fitting has a shape that fits into the tapered shape of the groove 17 described later in a state where the end fittings 12, 12 are overlapped. , 1 are joined up and down, the protruding strips 13 on the outer periphery of both end fittings 12 and 12 are overlapped, and the entire cross-section is tapered and protrudes to the outer periphery of the connecting portion. It is like that. An arcuate plate 15 is mounted on the outer periphery of the joint.

  The arc-shaped plate 15 has a shape obtained by dividing the circumferential direction of the cylindrical ring into three parts, and the inner peripheral surface is formed in an arc shape having substantially the same curvature as the outer peripheral surface of the end fitting 12, and the three arc-shaped plates 15 are formed. , 15 and 15 are formed in an arcuate direction length that creates a gap 16 that absorbs a fastening allowance at the time of fastening, which will be described later, when the end fitting 12 is fitted to the outer periphery.

On the inner peripheral surface of the arc-shaped plate 15, when the end fittings 12, 12 of the piles 1, 1 connected to each other are joined in a superposed arrangement, the protrusions projecting to the outer periphery of the joint portion A concave groove 17 into which the strips 13 and 13 are fitted is formed. As shown in FIG. 2, the concave groove 17 has a cross-sectional shape in which the opening has a wide taper shape so that the two protruding ridges 13, 13 overlapped with each other.

  The arcuate plates 15 adjacent to each other in a state where the arcuate plates 15, 15, 15 adjacent to each other are wound around the outer periphery of the end fittings 12, 12 are fitted to the outer surface of the end of the arcuate plate 15. Planar portions 19 and 19 (shown in FIGS. 3 and 5) are formed on the outer peripheral surface of the end portion 15 so as to be arranged on the same plane.

  The flat portions 19 and 19 have a shape in which the outer peripheral surfaces of the end portions of the arc-shaped plates 15 and 15 are scraped flat, leaving the arc-shaped interplate connecting projections 20 and 20 described later.

  The arc-plate connecting projections 20 and 20 are connected to each other by the arc-plate connecting fitting 21 to be connected and fixed, and the outer surfaces of the arc-shaped inter-plate connecting projections 20 and 20 are on the same plane. The outer surface is formed flat so as to be located at the position.

  As shown in FIGS. 1 and 2, the arc-shaped plate-to-plate connecting projections 20 and 20 have a vertically tapered shape with a narrow upper side and end surfaces of the adjacent arc-shaped plates 15 and 15 facing each other. The ant shape is divided in half vertically.

  That is, the arc-shaped interplate connecting projection 20 has a plate end side surface 20a parallel to the pile axis, and a plate center side surface 20b having a tapered shape with the upper side inclined toward the plate end side, That is, the protrusion surface side is formed in a wide dovetail shape from the protrusion root part. As a result, a pair of adjacent arc-shaped plate-to-plate connecting projections 20 and 20 form a tapered shape whose upper side is squeezed, and both tapered surfaces are formed in a wide dovetail shape on the projection surface side.

  The arcuate plate-to-plate connection fitting 21 is formed in a flat plate shape as a whole, and a tapered dovetail groove 22 into which the pair of arcuate plate-to-plate connection projections 20 and 20 that are tapered as described above is fitted. By sliding the arcuate plate-to-plate connection fitting 21 from the upper side of the arc-shaped plate-to-plate connection projections 20 and 20 and inserting it into the tapered dovetail groove 22, both horizontal component forces generated on the tapered surface are obtained. The arcuate plate-to-plate connecting projections 20 and 20 are connected to each other while acting in the direction of pulling each other.

In this manner, the three arc-shaped plates 15 arranged in a circle are fitted into the concave grooves 17 on the inner peripheral surface thereof, and the protruding strips 13 of the upper and lower end fittings 12 and 12 are fitted to each other, and the end portions of the respective arc-shaped plates 15 are interposed. By connecting the three arcuate plates 15 with each other by connecting the three arcuate plates, the three arcuate plates 15 are connected in a cylindrical shape, and the arcuate plates 15 are pulled together in the circumferential direction by the three arcuate plates. The upper and lower tapered surfaces of the ridges 13 and 13 of the end fittings 12 and 12 of both piles are formed in the concave groove 17 along the tapered surface of the concave groove 17 in which the cross section of the arc-shaped plate 15 is tapered. By being pushed in, the connection fittings 21 and 21 are pulled toward the approaching side and connected to each other.

  Bolt insertion holes 25 are opened through the front and back of both end portions of the arc-shaped plate connecting metal fitting 21 and the arc-shaped plates 15 and 15 are drawn and connected to the flat portions 19 at both ends of the arc-shaped plate 15. In this state, a screw hole 26 is formed at a position aligned with the bolt insertion hole 25, and a bolt 27 for sewing is inserted into the bolt insertion hole 25, screwed into the screw hole 26, and tightened. And the arcuate plate-to-plate connecting bracket 21 are fixed to each other.

  As shown in FIG. 7 (a), the connection work of the piles 1 and 1 by the welded joint configured as described above is performed by first building the lower pile 1 and joining the end fitting 12 at the upper end thereof. A ring-shaped shear ring 31 is fitted into the shear ring fitting portion 30 formed in 12c. At this time, the shear ring 31 is in a state in which the upper edge side protrudes on the joint surface 12c.

  Next, as shown in FIG. 5B, the upper surface of the shear ring 31 is fitted into the shear ring fitting portion 30 of the upper joint surface 12c, and the joint surface 12c of the end fitting 12 at the lower end of the upper pile 1 is It joins to the joint surface 12c of the edge part metal fitting 12 of the said lower pile 1. At this time, the shear ring fitting portion 30 has a narrow trapezoidal shape on the groove bottom 30a side, that is, a taper shape with a wider width on the groove opening side than the groove bottom 30a, and the upper side of the shear ring 31 has a corresponding tapered shape. Therefore, when the piles 1 and 1 are joined, the misalignment of the dimensional difference between the groove opening width b1 of the shear ring fitting portion 30 and the tip width b2 of the shear ring 31 is corrected, and accurate centering is performed. Made automatically and joined.

  By joining the piles 1, 1 in this way, the three arc-shaped plates 15, 15, 15 are formed in a ring shape on the outer sides of the protruding ridges 13, 13 that are superimposed on the outer periphery of the joint portion and project in an annular shape. The arc-shaped plate 15, the arc-shaped plate connection projections 20, 20 of the adjacent arc-shaped plates 15, 15 are fitted in the tapered dovetail groove 22 by sliding the arc-shaped plate connecting fitting 21. Fasten 15 to each other in the pulling direction and fix. The sliding operation of the arc-shaped plate connecting bracket 21 is performed using a hydraulic jack.

  Next, a bolt 27 for sewing is inserted into the bolt insertion hole 25 of the arc-shaped plate-to-plate connection fitting 21, screwed into the screw hole 26 of the arc-shaped plates 15, 15, and tightened, thereby connecting the arc-shaped plates 15, 15 to the arc-shaped plate. The metal fittings 21 are fixed to each other.

  In the above-described example, the arc-shaped plate 15 has a shape obtained by dividing the circumferential direction of the cylindrical ring into three parts, but may be formed into other plural parts.

  Further, the shear ring fitting portion 30 is formed in a tapered shape having a wider opening width side than the groove bottom side, but as shown in FIG. 8, the pile radial direction having the same opening width side compared to the groove bottom side. The cross section may be a rectangular concave groove, and the cross-sectional shape in the same direction of the shear ring 31 may be a square shape corresponding thereto.

Further, in the above-described example, the case where the shear ring fitting portion 30 is formed in the central portion of the radial width of the end fitting 12 having a disk ring shape (donut shape) is shown in FIG. As shown in the figure, the corners of the inner peripheral surface 12b of the opening formed at the center of the end fitting 12 and the joint surface 12c are formed in an annular shape having a stepped shape, and are formed on the inner peripheral surface 12b of the opening. A circular ring-shaped shear ring 31 may be fitted in the exposed arrangement.

  Further, in the above-described example, the case where the shear ring 31 is formed as a completely separate body from the end fitting 12 is shown. However, as shown in FIGS. 12 and a structure in which a shear ring fitting portion 30 is formed only on the other end fitting 12.

  Moreover, although the end metal fitting 12 has shown what was comprised with the flat ring-shaped board | plate material, the thing which interposed the skirt part which consists of a steel cylinder between the back surface of the end metal fitting 12, and the steel pipe 11 in addition to this. Various shapes can be used.

DESCRIPTION OF SYMBOLS 1 Pile 10 Pile main body 11 Steel pipe 12 End metal fitting 12a Inner peripheral surface 12c of end plate part 12b Opening part 12d End surface part inner peripheral surface 13 Convex strip 14a Torque transmission pin fitting hole 14b Torque transmission pin 15 Arc-shaped plate 16 Gap 17 Concave groove 19 Plane portion 20 Arc-shaped inter-plate connection projection 20a Plate end side surface 20b Plate center side surface 21 Arc-shaped inter-plate connection fitting 22 Tapered dovetail groove 25 Bolt insertion hole 26 Screw hole 27 Bolt 30 Shear ring fitting portion 30a Groove bottom 31 Shear ring b1 Groove opening width b2 of shear ring insertion part b2 Tip width of shear ring

Claims (5)

An end metal fitting is provided at each joint end of each pile to be connected to each other, and a plurality of arc-shaped plates fitted on the outer circumference of the two end metal fittings are fitted on the outer circumference, and the outer circumference of the both end metal fittings A flange-shaped ridge is integrally provided on the inner circumferential surface of the arc-shaped plate, and a groove is provided on the inner circumferential surface of the arc-shaped plate.
The concave groove has a tapered shape with a wide opening on the opening side, and the convex strip has a shape in which the cross section fits into the tapered shape of the concave groove with the metal fittings on both ends overlapped. In the unwelded joint of piles where the piles are connected by fitting the ridges of the end fittings into the concave grooves and fitting the arcuate plates to the outer periphery of the both end fittings,
A circular ring-shaped shearing ring interposed between the joining surfaces where the both end fittings are joined together,
The shear ring is formed in a taper shape that fits into a shear ring fitting portion formed of a concave groove having a narrower taper shape on the groove bottom side formed on the joint surface of the end fitting, than the groove opening side,
A plate-shaped arc-shaped plate-to-plate connection fitting that connects between the arc-shaped plates by fixing between the outer surfaces of the ends of the arc-shaped plates adjacent to each other,
The arc-shaped plate-to-plate fitting has a tapered dovetail with a narrow taper on either side of the top and bottom and a dovetail shaped cross section,
On the outer surface of each end portion of the arc-shaped plates adjacent to each other, each is provided with a projection for connecting between the arc-shaped plates in a shape obtained by vertically dividing a tapered dovetail that fits into the tapered dovetail groove,
Between arcuate plates the both said arcuate plates between coupling projections adjacent by inserting into the tapered dovetail is connected by the arc-shaped plate between the connecting fitting,
An unwelded joint for piles, characterized in that both ends of the arc-shaped plate-to-plate coupling fitting are screwed to adjacent arc-shaped plates. Each joining surface of both end fittings to be joined to each other has a shear ring fitting portion formed of a circular ring-shaped concave groove formed concentrically with the joining surface, and straddles the shear ring fitting portion of the both end fitting. And fitting the shear rings, and forming the respective shear ring fitting portions of the metal fittings at both ends into a tapered shape in which the groove bottom side of the concave groove is narrower than the groove opening side, and the inner peripheral surface of the shear ring and The non-welded joint for piles according to claim 1, wherein the outer peripheral surface is formed in a tapered shape whose upper and lower sides correspond to the respective shear ring fitting portions . The said shear ring fitting part is formed in the cyclic | annular form of the shape which scraped off the corner | angular part of the inner peripheral surface of the opening part which formed in the center of the joint surface of both ends metal fittings, and the said joint surface . Non-welded joint for piles.
The shear ring fitting portion is formed in a taper shape having a larger diameter on the joining surface side of the end fitting, and the upper and lower sides of the outer peripheral surface of the shear ring are reversely matched to the taper shape of the shear ring fitting portion of the joining surface . The non-welded joint for piles according to claim 3 formed in a tapered shape. The shear ring is integrally projected on one side of the metal fittings at both ends, and the cross section is formed in a taper shape having a trapezoidal shape with a narrowed protruding end side, and the shear ring is formed on the other side of the metal fittings on both ends The pile non-welded joint according to claim 1, wherein the pile is fitted to a shear ring fitting portion formed in a shape corresponding to a trapezoidal shape of a shear ring integral with the end fitting.

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