TW201445025A - Joint structure for posts - Google Patents

Abstract

To provide a joint structure for posts that is capable of preventing an occurrence of a gap between a shear ring and a shear ring fitting section and thereby reducing loss of sectional area of an end fitting due to the shear ring fitting section, and that also reduces cost and has good workability by using few members. A joint structure for posts comprises end fittings (12, 12) to be mutually connected at the junction ends of posts (1, 1), a connecting means for connecting between posts that spans across the outer circumferential faces of both end fittings (12, 12), and an annular shear ring (31) that fits into a ring-shaped groove-shaped shear ring fitting section (30) formed on one or both of the junction ends of both end fittings (12, 12) and is interposed by spanning between the junction ends of the end fittings (12). Both end fittings (12, 12) are formed so that inner circumferential sides (12c, 12c) of the junction ends thereof do not project in the axial direction with respect to outer circumferential sides (12b, 12b) and the shear ring fitting section (31) is formed to be biased toward the outer circumferential side of the end fitting (12).

Description

Joint structure of pile

The present invention relates to a joint portion structure of a pile that connects between piles that are joined to each other in the axial direction when the precast concrete pile and other piles are driven into the ground.

When the pile is driven into the ground, the precast concrete pile of a predetermined length is generally connected according to the need to be connected in the direction of the pile axis and is driven to the desired depth. At this time, the connection between the piles is conventionally adopted. A method of joining metal end members to each other at the ends of the precast concrete piles by means of a joining means.

This joining means generally welds the outer peripheral edges of the metal members at both ends, but in recent years, it has been developed without relying on a fusion-free joint in which the piles are welded to each other.

In the conventional fusion-free joint, as shown in Fig. 14, the end metal members 2 and 2 which are integrated with the ends of the two piles 1 and 1 which are intended to be connected to each other are fitted to the outer periphery of both. The cylindrical plate is divided into a plurality of arc-shaped pallets 3, 3, ... in the circumferential direction, and is formed in the groove 4 formed on the inner peripheral surface of the arc-shaped pallets 3, 3, ... Both ends of the metal parts 2, 2 A method in which the flange-shaped ridges 5 and 5 of the outer peripheral surface are fitted in a state in which the flange-like ribs 5 and 5 are fitted to each other, and the arc-shaped pallet 3 is fixed to the both end metal members 2 and 2 by the bolt 6 has been developed (for example, Patent Document 1) .

And the method of fixing the arc-shaped pallets 3, 3, ..., as shown in Fig. 15, the arc-shaped pallets 3 mounted on the end metal members 2, 2 across the two piles 1, 1. The arc-shaped inter-plate connecting projections 3a and 3a having a 榫-shaped longitudinally divided shape are formed on the outer periphery of the end portion, and the metal is connected between the plate-shaped arc-shaped pallets that can be fitted into the squat-shaped tapered sulcus 7a. In the case 7, the connecting projections 3a and 3a are fitted into the tapered groove 7a to slide the arc-shaped inter-plate connecting metal member 7, and the arc-shaped pallets 3 and 3 are brought close to each other and the connector has been developed (patent Literature 2).

On the other hand, in the pile 1 that is driven into the ground, a plurality of PC tension materials facing the pile axis direction are provided at intervals in the circumferential direction of the pile, and the pre-tension is introduced into the concrete portion by the PC tension material.

In the joint structure of the pile, when the large shearing force such as an earthquake acts on the joint portion, the bolts, the arc-shaped pallet, and the metal members 2 and 2 at the opposite ends of the joint metal member are joined. Since the shearing resistance in the direction perpendicular to the axial direction is smaller than that of the pile body, deformation by the shearing force may cause damage.

Here, an annular groove-shaped shear ring fitting portion is provided at a joint end surface portion of the end metal pieces joined to each other, and a joint end surface portion that is fitted into the shear ring fitting portion and spans the both end metal pieces is provided. The ring-shaped shear ring provided between the two has been developed to improve the shear resistance of the joint portion (for example, refer to Patent Document 3).

[Prior Art Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2003-082656

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2011-089302

[Patent Document 3] Japanese Patent Laid-Open Publication No. 2005-213947

However, in the above-described prior art, since the connecting means is configured to connect the piles between the outer peripheral surfaces of the metal members at both end portions, it is possible that the outer peripheral portions of the metal members at both ends are separated from each other during joining. Since the connection by the connecting means is hindered, it is necessary to strictly manage the dimensions of the metal members at both ends, that is, to consider the deformation of the end metal member when it is introduced into the pre-tensioning state, and to manage the size of the pile-axis direction of the end metal member. The tolerance is such that the inner peripheral side portion does not protrude from the outer peripheral side portion in the pile axis direction.

On the other hand, the shear ring is preferably a gapless insertion of the shear ring insert portion, and the dimensional tolerance of the pile end direction of the management end metal member is such that the inner peripheral side portion does not protrude from the outer peripheral side portion in the pile axis direction, that is, Since the dimensional tolerance of the pile-axis direction of the inner peripheral side portion of the end metal member is only allowed to the inner side in the pile axis direction, a gap may be generated between the shear ring and the shear ring insert portion. Further, it is expected that the gap has to be generated. When the cross section of the shear ring is increased, it is necessary to increase the thickness of the end metal piece in the direction of the pile axis direction by considering the cross-sectional defect of the end metal piece caused by the shear ring fitting portion. There is a problem of having a large weight of the end metal piece.

Here, the present invention is in view of the conventional problems, and an object thereof is to provide a joint structure of a pile, which can efficiently exhibit high bending endurance and high shear endurance, and prevent the shear ring and the shear ring insertion portion. The occurrence of the gap can reduce the cross-sectional defect of the end metal piece generated by the shear ring fitting portion of the portion, and further, a small number of members are used, and the workability is good.

A feature of the invention of claim 1 which solves the above-mentioned problems is a joint portion structure of a pile, comprising: an end metal member joined to each other at a joint end portion of each pile connected to each other, and a connecting means for connecting the piles between the outer peripheral surfaces of the metal members at both end portions, and an annular groove-shaped shear ring fitting portion that is fitted into one or both of the joint end faces of the end portions of the metal members And an annular shear ring disposed between the joint end faces of the end metal members, wherein the end portions of the metal members are formed so that the inner peripheral side portions of the joint end faces do not protrude in the pile axis direction. The outer peripheral side portion is disposed in the vicinity of the connecting means so as to form the shear ring fitting portion close to the outer peripheral side of the end metal member.

The invention of claim 2 is characterized in that, in the first aspect of the patent application, the outer peripheral portion of the end metal member is provided with a flange-like ridge protruding outward, and the connecting means is provided with a horizontal a plurality of arc-shaped pallets that are fitted to the outer peripheral portions of the arc-shaped pallets, and a plurality of arc-shaped pallets that are fitted to the outer peripheral portions of the arc-shaped pallets The arc-shaped pallet is fitted to the outer periphery of the both end metal members, and the two piles are coupled by the insertion groove in a state in which the two ribs are overlapped.

The feature of the invention of claim 3 is the configuration of claim 1 or 2, which is provided by fixing the outer surface of the end portion of the arc-shaped pallet adjacent to each other. A metal member is connected between the plate-shaped arc-shaped pallets connected between the pallets, and a metal member is connected between the arc-shaped pallets, and one of the upper and lower sides is formed into a narrow tapered shape and a cross section is a trench. In the outer surface of each end portion of the arcuate pallet adjacent to each other, each of the outer surfaces of the arcuate slats is provided with an arc having a tapered shape which is fitted into the tapered surface of the tapered surface. a projection for connecting between the inter-plates, wherein the arc-shaped inter-plate connecting projections are inserted into the tapered surface trenches, and the arc-shaped pallets adjacent to each other are connected by the arc-shaped inter-plate connecting metal members. The two ends of the arc-shaped inter-plate connecting metal members are screwed to the arc-shaped pallets adjacent to each other.

The invention of claim 4 is characterized in that, in the configuration of the first, second or third aspect of the patent application, the shear ring fitting portion of the end metal member is formed such that the width of the bottom surface side is wider than that of the joint end surface. The inner peripheral surface and the outer peripheral surface of the shear ring are formed into a tapered shape in which the shape of the shear ring fitting portion is vertically up and down.

The invention of claim 5 is characterized in that, in the configuration of the first, second, third or fourth aspect of the patent application, the shear ring is integrally protruded on one side of the two end metal members. The shear ring is fitted to the shear ring fitting portion that forms the shape of the shear ring that is integral with the end metal member, on the other side of the both end metal members.

The invention of claim 6 is characterized in that, in the configuration of the first, second, third, fourth or fifth aspect of the patent application, the bottom surface of the two shear ring insertion portions is partially raised in height. The convex portion and the upper and lower surfaces of the shear ring are integrally provided with a concave portion in which the convex portion is fitted at a position corresponding to the convex portion of the bottom surface, and the convex portion of the bottom surface is fitted into the concave portion on the lower surface of the shear ring. The relative movement in the circumferential direction of the shear ring and the metal members at both ends is prevented, and the rotational moment between the piles connected vertically is transmitted.

The joint portion structure of the pile according to the present invention is characterized in that: the "joint portion structure of a pile includes: an end metal piece joined to each other at the joint end portions of the piles connected to each other, and a metal piece that spans the both end portions. a connecting means for connecting the piles between the outer peripheral surfaces, and an annular groove-shaped shear ring fitting portion formed in one or both of the joint end faces of the both end metal members, and spanning the end metal pieces An annular shear ring provided between the joint end faces forms the end portions of the metal members so that the inner peripheral side portions of the joint end faces do not protrude from the outer peripheral side portions in the pile axis direction, and are considered to be produced by pretensioning. The deformation of the end metal member or the like prevents the outer peripheral side portions of the metal members at both ends from being separated from each other when the pile is joined, and the connecting means can be surely connected between the metal members at both ends, and in the two The outer peripheral side portions of the end metal members are optimally joined to each other with no gap therebetween.

And in the present invention, except for the outer peripheral side of the metal members at both ends In addition, the shear ring fitting portion and the shear ring are disposed in the vicinity of the connecting means by "the shear ring fitting portion is formed close to the outer peripheral side of the end metal fitting". It is fitted without any gaps, and even a small shear ring with a small cross-sectional area can effectively exhibit shear strength. With this, the cross-sectional area of the shear ring-embedded portion can be reduced, and the cut by the setting can be reduced. Since the cross-section of the end metal piece produced by the ring-embedded portion is defective, the end metal member can be made thinner.

Further, by shortening the distance between the shear ring and the shear ring embedding portion and the joining means, it is possible to reduce the rotational moment around the outer peripheral surface (fixed end) in the shear ring portion of the end metal member, even if When the tensile force acts in the direction of the two pile axes, the shear ring and the shear ring fitting portion are maintained in a state of no gap fitting, so that the shear ring with a small cross-sectional area can be made to have a high shear. endurance.

Further, in the present invention, the "attachment means" is provided with a flange-like rib protruding outwardly from the outer peripheral portion of the end metal member, and the connecting means is provided with both end portions of the metal members which are joined to each other and a plurality of arc-shaped pallets fitted to the outer circumference of the arc-shaped pallet, a groove is provided on an inner circumferential surface of the arc-shaped pallet, and the arc-shaped pallet is fitted to an outer circumference of the two end metal members. When the two ridges are overlapped and the two piles are connected by the insertion groove, the pile can be connected without welding, and the strength is not connected by the welding, so that it is not required to be highly skilled, and the pile is not required. It is easy to connect work, and it can be carried out efficiently without being weathered.

Further, in the present invention, the arc is provided by "fixing the outer surface of the end portion of the arc-shaped pallet adjacent to each other adjacent to each other" A metal member is connected between the plate-shaped arc-shaped pallets connected between the pallets, and a metal member is connected between the arc-shaped pallets, and one of the upper and lower sides is formed into a narrow tapered shape and a cross section is a trench. In the outer surface of each end portion of the arcuate pallet adjacent to each other, each of the outer surfaces of the arcuate slats is provided with an arc having a tapered shape which is fitted into the tapered surface of the tapered surface. a projection for connecting between the inter-plates, wherein the arc-shaped inter-plate connecting projections are inserted into the tapered surface trenches, and the arc-shaped pallets adjacent to each other are connected by the arc-shaped inter-plate connecting metal members. The screw-shaped brackets of the connecting members of the arc-shaped pallets are screwed to the arc-shaped pallets adjacent to each other, so that most of the screwing operations are not required, and since the components are lightweight, the workability is good. The connection between the piles can be carried out in a short time.

Further, in the present invention, the inner peripheral surface of the shear ring is formed by forming a tapered ring-shaped portion of the end metal member so as to have a tapered surface having a width on the bottom surface side narrower than the joint end surface opening portion side. And the outer peripheral surface is formed in a tapered shape that corresponds to the shape of the shear ring fitting portion up and down. When the end metal members of the upper and lower piles are joined, the tapered surface groove and the shear ring of the metal members at both ends are joined. With a tapered shape, the centering between the two piles can be automatically performed, and high-precision joining between the piles becomes easy.

Further, in the present invention, the shear ring is integrally formed on one side of the both end metal members by the "shear ring", and the shear ring is fitted to the other side of the both end metal members. In the shear ring fitting portion which is formed in a shear ring shape integral with the end metal member, the formation of the shear ring is formed by the formation of the end metal member, so that the manufacturing process is reduced and the cost is lowered.

Further, in the present invention, the bottom surface of the two shear ring fitting portions is provided with a convex portion that partially raises the bottom surface, and the upper and lower surfaces of the shear ring are integrally formed at positions corresponding to the convex portions of the bottom surface. The concave portion having the convex portion is fitted, and the convex portion of the bottom surface is prevented from being moved in the circumferential direction of the shear ring and the metal members at both ends by the concave portion fitted to the lower surface of the shear ring, thereby The rotational moment between the connected piles is transmitted, and the relative movement of the fitting rotation direction of the uneven portion is prevented, so that the torque transmission function is simultaneously added, and a multi-functional joint structure can be obtained by a small number of members.

1‧‧ ‧ pile

2‧‧‧End metal parts

3‧‧‧Arc plate

3a‧‧‧Linking protrusions

4‧‧‧ groove

5‧‧ ‧ ribs

6‧‧‧ bolt

7‧‧‧Connected metal parts

7a‧‧‧Cone sulcus

8‧‧‧PC tension material

10‧‧‧ Pile body

11‧‧‧ steel pipe

12‧‧‧End metal parts

12a‧‧‧ joint end face

12b‧‧‧Surrounded side

12c‧‧‧ inner side of the week

13‧‧ ‧ ribs

14a‧‧‧Torque transmission pin fitting hole

14b‧‧‧Torque transmission pin

15‧‧‧Arc plate

16‧‧‧ gap

17‧‧‧ Groove

19‧‧‧Flat Department

20‧‧‧With the protrusion between the arc-shaped pallets

20a‧‧‧ side of the end of the pallet

20b‧‧‧ the central side of the pallet

21‧‧‧Connected metal parts between curved pallets

22‧‧‧ Cone sulcus

25‧‧‧Bolt insertion hole

26‧‧‧Threaded holes

27‧‧‧ bolt

30‧‧‧shear ring embedding

31‧‧‧shear ring

32‧‧‧ recess

33‧‧‧ convex

[Fig. 1] A cross-sectional view showing an example of a structure of a joint portion of a pile of the present invention.

[Fig. 2] A longitudinal section view of the same as above.

[Fig. 3] A partially broken perspective view showing an example of a shear ring used in the present invention.

Fig. 4 is an enlarged longitudinal sectional view showing the joint portion in Fig. 2;

[Fig. 5] A cross-sectional view of the inter-arc connection structure of the joint portion shown in Fig. 1 .

[Fig. 6] Same as the front view.

[Fig. 7] The arc-shaped pallet without the fusion joint shown in Fig. 1 is shown, (a) is an end view, and (b) is a plan view of the end.

[Fig. 8] shows the arc-shaped pallet without the fusion joint shown in Fig. 1. Interconnecting metal members, (a) is a front view, and (b) is a top view.

[Fig. 9] A cross-sectional view showing a portion of the shear ring fitting portion and the shear ring of the pile joining process.

[Fig. 10] A partial cross-sectional view showing another embodiment of the present invention.

[Fig. 11] A partial cross-sectional view showing still another embodiment of the present invention.

[Fig. 12] A partial cross-sectional view showing still another embodiment of the present invention.

[Fig. 13] A partial cross-sectional view showing still another embodiment of the present invention.

[Fig. 14] A longitudinal sectional view showing an example of a conventional example.

[Fig. 15] A partial perspective view showing another conventional example.

Next, an embodiment of the joint portion construction of the pile of the present invention will be described in accordance with an embodiment as shown. Further, reference numeral 1 in the drawing is a precast concrete pile (hereinafter referred to as a pile) which is connected by the joint portion structure of the pile of the present invention.

The pile 1 includes a pile body 10 made of concrete, a steel pipe 11 on the outer periphery of the pile body 10, and an end metal piece 12 integrated with the end portion of the pile body 10 in the pile axis direction, and each pile 1 and 1 It is connected by a joint.

The joint portion structure includes end metal members 12 and 12 joined to each other at joint ends of the piles 1 and 1 connected to each other, and two spans A connecting means for connecting the piles between the outer peripheral surfaces of the end metal members 12, 12.

The end metal member 12 is formed into a hollow circular plate shape, and its surface side is a joint end surface 12a, 12a.

The both end metal members 12 and 12 are formed so that the inner peripheral side portions 12c of the joint end faces 12a and 12a do not protrude from the outer peripheral side portion 12b in the pile axis direction.

The both end portions of the metal members 12 and 12 are strictly managed in the pile axis direction of the outer peripheral side portion 12b as compared with the inner peripheral side portion 12c, and the inner tolerance of the inner peripheral side portion 12c is only allowed to the inner side of the pile axis direction. (the direction in which the two joint end faces 12a and 12a face away from each other) such that the inner peripheral side portions 12c of the joint end faces 12a and 12a do not protrude from the outer peripheral side portion 12b in the pile axis direction.

In other words, the metal members 12 and 12 at both ends are in a state in which the entire center of the joint end faces 12a and 12a is recessed toward the inner side in the pile axis direction, and the entire plate is gently bent. The metal members 12 and 12 at both ends are bent. At the time of joining, the joint end surface outer portions 12b and 12b of the both end metal members 12 and 12 are surely abutted without gaps, and the joint end faces 12a and 12a are integrally joined together in this state.

In the end metal fitting 12, the ends of the PC tensioning members 8, 8, ... for pretensioning in the insertion pile body 10 are fixed at intervals in the circumferential direction of the pile.

On the other hand, in each of the upper and lower joint end surface portions, the end metal fitting 12 is disposed concentrically, and the outer side of the PC tension members 8, 8 is cut by a circular groove arranged in a circular ring shape. The ring insert 30 is formed The position facing each other.

The shear ring fitting portion 30 is formed on the outer peripheral side of the end metal fitting 12, and is disposed in the vicinity of the connecting means, that is, the outer peripheral side portion 12b of the joint end surface 12a, and spans the two shear ring fitting portions 30, 30. The inner arrangement allows the circular ring-shaped shear ring 31 to be fitted.

Each of the shear ring fitting portions 30 and 30 has a semicircular cross section in the radial direction of each of the piles, and the shear ring 31 has a cross section in the radial direction of the pile as shown in Fig. 3 .

In this manner, since the shear ring fitting portion 30 is formed on the outer peripheral side of the end metal fitting 12, that is, on the side closer to the portion 12b that is surely abutted without gaps, when the both end metal members 12, 12 are joined, It is not affected by the dimensional tolerance of the inner peripheral side portions 12c and 12c of the metal members at both ends, and since the shear ring 31 is often fitted into the two shear ring fitting portions 30 and 30 without a gap, even if the sectional area is small The shear ring 31 can also exhibit excellent cutting endurance, and the sectional area of the shear ring fitting portion 30 can be reduced, and the cross section of the end metal piece produced by the shear ring fitting portion 30 can be reduced. In the case of the defect, the thickness of the end metal member 12 can be reduced.

Further, by arranging the shear ring 31 and the shear ring fitting portion 30 in the vicinity of the connecting means 15, 15, ..., the distance between the shear ring 31 and the connecting means 15, 15 ... is shortened. It is possible to reduce the rotational moment around the outer peripheral surface (fixed end) in the portion of the shear ring 31 of the both end metal members 12, 12, so even if the tensile force in the direction of the pile axis acts on the two piles 1, 1 The distance between the joint end faces 12a, 12a of the broken ring portion is not enlarged because the shear ring 31 and the shear ring insert portions 30, 30 are maintained without gaps. Since it is in a fitted state, even a small shear ring 31 having a small sectional area can exert a high shearing endurance.

Further, in the joint end faces 12a and 12a of the end metal members 12 and 12, the joint end faces 12a are arranged concentrically, and a plurality of torque transmitting pin fitting holes are formed inside the PC tension members 8, 8... 14a and 14a, the torque transmission pin 14b is fitted between the two joint end faces 12a and 12a.

The outer circumference of the end metal fitting 12 is integrally formed with a ridge 13 projecting in a flange shape from the outer circumference of the steel pipe 11, and when the upper and lower piles 1 and 1 are joined up and down, the outer circumferences of the metal members 12 and 12 at both ends are formed. The ridges 13 and 13 are protruded toward the outer periphery of the joint portion in a state in which the ridges 13 and 13 are overlapped.

The connecting means is a plurality of arc-shaped pallets 15, 15 which are fitted to the outer end portions of the two end metal members 12 and 12 which are joined to each other and are wound and arranged, by the arc-shaped pallet 15, 15... The outer circumference of the joint portion is joined between the end portions of the metal members 12 and 12, thereby connecting the piles 1 and 1.

The arcuate pallet 15 has a shape in which the cylindrical ring is divided into three in the circumferential direction, and the inner peripheral surface is formed in an arc shape having substantially the same curvature as the outer peripheral surface of the end metal member 12, and is plural (in this embodiment) When the three arc-shaped pallets 15, 15, and 15 are fitted to the outer periphery of the end metal fitting 12, the arc-shaped length of the gap 16 which can absorb the interference amount at the time of tightening mentioned later is formed.

In the inner peripheral surface of the arcuate pallet 15, when the end metal members 12, 12 of the piles 1, 1 joined to each other are joined, the ridges 13, 13 in a state of being overlapped with each other toward the outer periphery of the joint portion are formed. A fitting recess 17 is provided.

In the outer side of the end of the arcuate pallet 15, adjacent to each other Each of the arc-shaped pallets 15, 15, 15 is formed at the outer periphery of the end portions of the arc-shaped pallets 15, 15 adjacent to each other in a state of being fitted to the outer periphery of the end metal members 12, 12 in a wound manner. The planes are formed with flat portions 19, 19 arranged on the same plane as each other.

The flat portions 19 and 19 have a shape in which the outer peripheral surfaces of the end portions of the arcuate pallets 15 and 15 are cut in a plane in the arc-shaped inter-plate connecting projections 20 and 20 which will be described later.

The arc-shaped inter-plate connecting projections 20 and 20 are fixed to each other by the arc-shaped inter-plate connecting metal members 21, and the outer surfaces of the two arc-shaped inter-plate connecting projections 20 and 20 are located in the same The way on the plane, the outside will form a plane.

The arc-shaped inter-plate connecting projections 20 and 20 are formed in a state in which the upper end of the arc-shaped pallets 15 and 15 adjacent to each other face each other, and the upper side is narrow in the longitudinal direction and the cross section is as follows. Fig. 5 shows a half-cut shape in which the 榫 type is divided into two in the longitudinal direction.

In other words, the arc-shaped inter-plate connecting projections 20 are such that the pallet end side surface 20a is parallel to the pile axis, and the pallet center side surface 20b has a tapered shape in which the upper side is inclined toward the pallet end side, and the pallet surface side is a projection. The convex surface side of the root is formed into a wide 榫 type. Thereby, a pair of arcuate inter-plate connecting projections 20 and 20 adjacent to each other are formed in a tapered shape on the upper side, and the two tapered surfaces are formed in a U-shape having a wide width on the surface side of the projection.

The arc-shaped inter-plate connecting metal member 21 is formed into a flat plate as a whole, and a tapered surface is formed on the back surface of the arc-shaped inter-plate connecting projections 20 and 20 which are formed into a tapered shape. Face trench 22, by The arc-shaped inter-plate connecting metal member 21 is slid from the upper side of the arc-shaped inter-plate connecting projections 20 and 20 and inserted into the tapered surface groove 22, and the horizontal component force occurring on the tapered surface faces toward The two arc-shaped inter-plate connecting projections 20 and 20 are moved toward each other and are coupled to each other.

Thus, the ends of the three arc-shaped pallets 15 arranged in a circular shape are connected to each other by the three arc-shaped inter-plate connecting metal members 21, and the three arc-shaped pallets 15, 15 are connected to each other. The cylindrical shape connects the end metal members 12 and 12 of the two piles.

In the both end portions of the joining metal members 21 between the arc-shaped pallets, the bolt insertion holes 25 are opened through the front and back, and at the flat portions 19 at both ends of the arc-shaped pallet 15, the aforementioned arc-shaped pallets are used. In a state in which 15 and 15 are connected to each other, a screw hole 26 is formed at a position integrated in the bolt insertion hole 25, and the bolt 27 for sewing is inserted into the bolt insertion hole 25 and screwed into the screw hole 26, and by screwing, The arc-shaped pallets 15, 15 and the arc-shaped pallet-connecting metal members 21 are fixed to each other.

The connection of the piles generated by the joint structure of the pile thus constructed is first, as shown in Fig. 9, the lower pile 1 is first driven, and the annular shear ring 31 is fitted to the upper end. The shear ring fitting portion 30 of the outer peripheral side portion 12b of the joint end surface 12a of the end metal fitting 12 is formed.

Further, the torque transmission pin 14b is fitted to each of the torque transmission pin fitting holes 14a, 14a, ... of the end metal fitting 12 of the lower side pile.

Then, the upper side of the shear ring 31 is fitted into the shear ring fitting portion 30 of the upper joint end surface 12a, and the torque transmission pin 14b is fitted to the torque transmitting pin fitting hole 14a of the upper joint end surface to make the upper pile. The joint end surface 12a of the end metal piece 12 at the lower end of the first end is joined to the joint end surface 12a of the end metal piece 12 of the pile 1 on the lower side.

At this time, the metal members 12 and 12 at both ends are strictly managed in the direction of the pile axis direction of the outer peripheral side portion 12b as compared with the inner peripheral side portion 12c, and only the allowable pile shaft by the dimensional tolerance for the inner peripheral side portion 12c. The inner side of the direction (the direction in which the two joint end faces 12a and 12a face away from each other) causes the inner peripheral side portions 12c of the joint end faces 12a and 12a not to protrude from the outer peripheral side portion 12b in the pile axis direction, and the both end metal members 12 and 12 are joined. At this time, the joint end surface outer portions 12b and 12b of the both end metal members 12 and 12 are always surely and have no gap contact, and the joint end faces 12a and 12a are integrally joined in this state.

When the two end metal members 12 and 12 are joined, the size of the joint end surface outer portions 12b and 12b of the both end metal members 12 and 12 is strictly managed, and the gap is not formed by the grounding, because the shear ring insertion portion is formed. 30 is formed on the outer peripheral side of the end metal member 12, that is, the portion 12b in the state in which the joint end faces abut each other, so that the dimensional tolerance of the inner peripheral side portions 12c, 12c of the both end portions is not affected. The shear ring 31 is fitted to the two shear ring fitting portions 30 and 30 without gaps, and the shear ring is disposed across the joint end faces 12a and 12a.

By joining the piles 1 and 1, the ridges 13 and 13 are annularly protruded so as to overlap the outer circumferences of the metal members 12 and 12 at both ends, and the three arc-shaped pallets 15, 15, and 15 are formed. The annular shape is fitted to the outside of the ridges 13, 13. By sliding the arc-shaped inter-plate connecting metal member 21, the arc-shaped pallets of the adjacent arc-shaped pallets 15 and 15 are connected to each other. 20, 20 are fitted into the tapered groove 22, facing the arc-shaped pallets 15, 15 Screw them close to each other.

The sliding operation of the connecting metal member 21 between the arc-shaped pallets is performed using a hydraulic jack.

Next, the bolts 27 for sewing are inserted into the screw insertion holes 25 of the arc-shaped pallet-connecting metal members 21 and screwed into the screw holes 26 of the arc-shaped pallets 15, 15 by screwing, and the arc-shaped pallets 15 are 15 and the arc-shaped inter-plate connecting metal members 21 are fixed to each other.

Further, in the above-described example, an example in which a connecting means having an arcuate pallet is used is described. However, the connecting means is not limited thereto. For example, between the outer peripheral edges of the end metal members 12 and 12 which are continuous without a gap therebetween, A welder or the like is also possible.

Further, in the above-described example, the arc-shaped pallet 15 has a shape in which the cylindrical ring is divided into three in the circumferential direction, but may be divided into other plural shapes.

Further, although the shear ring fitting portion 30 is formed in a semicircular cross section, the aspect of the shear ring fitting portion 30 is not limited thereto. As shown in Fig. 10, the width of the central opening of the end plate is wider than that of the bottom surface side. In the tapered shape, as shown in Fig. 11, a cross section in the pile radial direction which is the same as the side opening width side of the end plate may be formed into a square groove, and the cross-sectional shape of the shear ring 31 in the same direction may be formed. The square shape is also ok.

Further, in the above-described example, the case where the shear ring 31 and the end metal member 12 are completely formed separately is shown, but as shown in Fig. 12, the shear ring 31 is integrated with one end metal member 12. Forming only the structure in which the other end metal piece 12 forms the shear ring insertion portion 30 can.

Further, as shown in Fig. 13, the bottom surface of the two shear ring fitting portions 30 is provided with a convex portion 33 that partially raises the bottom surface, and the upper and lower surfaces of the shear ring 31 are positioned at the convex portions 33 corresponding to the bottom surface. The recessed portion 32 in which the convex portion 33 is fitted is integrally provided, and the convex portion 33 of the bottom surface is fitted to the concave portion 32 on the lower surface of the shear ring, so that the shear ring 31 and the metal members 12 and 12 at both ends are circumferentially oriented. The relative movement is prevented, and the rotational moment between the piles 1 and 1 connected up and down may be transmitted.

Further, although the end metal member 12 is formed of a plate material having a circular plate shape, various other types such as a skirt made of a steel cylinder may be used between the back surface of the end metal member 12 and the steel pipe 11. Shaper.

8‧‧‧PC tension material

10‧‧‧ Pile body

11‧‧‧ steel pipe

12‧‧‧End metal parts

12a‧‧‧ joint end face

12b‧‧‧Surrounded side

12c‧‧‧ inner side of the week

13‧‧ ‧ ribs

14a‧‧‧Torque transmission pin fitting hole

14b‧‧‧Torque transmission pin

15‧‧‧Arc plate

17‧‧‧ Groove

21‧‧‧Connected metal parts between curved pallets

25‧‧‧Bolt insertion hole

26‧‧‧Threaded holes

27‧‧‧ bolt

30‧‧‧shear ring embedding

31‧‧‧shear ring

Claims (6)

A joint portion structure of a pile includes: an end metal piece joined to each other at an joint end portion of each of the piles connected to each other; and a connecting means for connecting the piles between the outer peripheral surfaces of the pair of end metal parts, and Embedding an annular ring-shaped shear ring fitting portion formed in one or both of the joint end surface portions of the end metal members and extending across the joint end surface of the end metal member, The end portion metal member is formed such that an inner peripheral side portion of the joint end surface does not protrude from the outer peripheral side portion in the pile axis direction, and the shear ring fitting portion is formed close to the outer periphery of the end metal member. The side is disposed in the vicinity of the aforementioned connecting means. The joint portion structure of the pile according to the first aspect of the invention, wherein the outer peripheral portion of the end metal member is provided with a flange-like ridge protruding outward, and the connecting means is provided to be joined to each other across the joint a plurality of arc-shaped pallets on the outer circumference of the arc-shaped pallet are provided on the inner peripheral surface of the arc-shaped pallet, and the arc-shaped pallet is fitted to the both end portions The outer periphery of the metal member is joined between the two piles by inserting the groove in a state in which the two ridges are overlapped. The joint portion structure of the pile according to claim 2, wherein the outer end portion of the arc-shaped pallet adjacent to each other is provided A metal member is fixed between the plate-shaped arc-shaped pallets that are fixed between the arc-shaped pallets, and a metal member is connected between the arc-shaped pallets, and one of the upper and lower sides is formed into a narrow tapered surface. a tapered groove having a sulcus-like cross-sectional shape, and each of the end portions of the end portions of the arc-shaped pallet adjacent to each other has a tapered conical shape to be fitted to the tapered surface groove a projection for connecting between the arc-shaped pallets having a longitudinally divided shape, wherein the arc-shaped pallet between the arc-shaped pallets adjacent to each other is inserted into the arcuate pallet by the projections for connecting the arc-shaped pallets The inter-plate connecting metal members are coupled, and both end portions of the arc-shaped inter-plate connecting metal members are screwed to the arc-shaped pallets adjacent to each other. The joint portion structure of the pile according to the first, second or third aspect of the invention, wherein the shear ring fitting portion of the end metal member is formed into a tapered portion having a bottom side side width narrower than a joint end surface open portion side. In the planar shape, the inner circumferential surface and the outer circumferential surface of the shear ring are formed into a tapered shape that corresponds to the shape of the shear ring fitting portion. The joint portion structure of the pile according to the first, second or third aspect of the invention, wherein the shear ring is integrally protruded on one side of the both end metal members, and the metal at the both end portions The other side of the piece is fitted to the shear ring fitting portion that forms the shape of the shear ring that is integral with the end metal piece. The joint portion structure of the pile according to the first, second or third aspect of the invention, wherein the bottom surface of the two shear ring fitting portions is provided with a convex portion that partially raises the bottom surface and is in the shear ring The upper and lower surfaces integrally include a concave portion in which the convex portion is fitted at a position corresponding to the convex portion of the bottom surface, and the convex portion of the bottom surface is formed by a concave portion fitted to the lower surface of the shear ring to cut the ring and both end portions The relative movement of the metal members in the circumferential direction is prevented, and the rotational moment between the piles connected up and down is transmitted.