JP2019065526A - Steel pipe pile and steel pipe sheet pile series, and detachable follower from steel pipe pile and steel pipe sheet pile belonging to the same - Google Patents

Abstract

To provide a series of steel pipe piles and steel pipe sheet piles in which axial alignment is easy when fitting the same follower and mechanical joints provided in steel pipe piles having different diameters.SOLUTION: It has a steel pipe group in which a mechanical joint J having a size corresponding to the diameter of a steel pipe S and the thickness of the steel pipe is provided at the end of the steel pipe, the mechanical joint J has a pin joint 20 provided on one steel pipe S1 and a box joint 10 provided on the other steel pipe S2 among the two steel pipes S (S1, S2) connected to each other, a load transfer key 30 is provided which prevents the pin joint 20 and the box joint 10 from being separated in the axial direction of the steel pipe S by engaging an outward groove portion provided in the pin joint 20, and an outward reference surface 26 is provided on part of an outer peripheral surface 21 of the pin joint 20 in which the distance from the axial center of the steel pipe S1 is set to be constant regardless of the diameter and thickness of the steel pipe S1 in which the pin joint 20 is provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a series of steel pipe piles and steel pipe sheet piles developed with at least one of a steel pipe diameter and a steel pipe thickness being different, and to a Yatko detachable from the steel pipe piles and steel pipe sheet piles belonging to the series.

  Steel pipe piles and steel pipe sheet piles are conventionally connected by welding and joining each single pipe carried into a construction site on site. In recent years, instead of welding, mechanical joints capable of rapid construction have been adopted for connection of steel pipe piles and steel pipe sheet piles.

  As disclosed in Patent Document 1, this mechanical joint is composed of a pin joint, a box joint, a load transfer key and a set bolt provided at the end of a steel pipe.

  The box joint is provided with an inward groove portion on its inner peripheral surface, and the load transfer key stored in the inward groove portion is configured to be able to advance and retract in the radial direction by the rotation of a set bolt. The pin joint is provided with an outward groove at a position opposite to the inward groove provided in the box joint. Insert the pin joint welded to the other steel pipe into the box joint welded to one of the two steel pipes to be connected, and then rotate the set bolt to the inward groove of the box joint. The stored load transfer key is inserted into the outward groove portion of the pin joint, and two steel pipes are connected by integrating the joint members.

  Steel pipe piles and steel pipe sheet piles are driven by the vibration method, rotation method, middle digging method, pre-boring method, etc. For example, in the vibration method, since vibration is applied by means of a vibrator hammer, it is pressed with a vibrator chuck. When the mechanical joint provided in the steel pipe pile and the steel pipe sheet is directly gripped, the mechanical joint may be deformed, which may cause interference in the fitting. So Yattoko is used to avoid this.

  For example, the jack joint that can be attached to and detached from the pin joint has an inner peripheral surface to which the pin joint can be inserted exactly in the main body, and an inward groove is provided on the inner peripheral surface at a position opposite to the outward groove of the pin joint There is. The load transfer key is inserted from the outside of the yatco through the opening provided in the main body, and arranged so as to straddle the inward facing groove and the outward facing groove provided in the pin joint. The joint is configured to be mechanically coupled.

  By the way, the steel pipe pile and the steel pipe sheet are developed in series such that the diameter of the steel pipe is 400400 to 1600 mm and the thickness of the steel pipe is 9 to 30 mm. Therefore, it was necessary to prepare Yatsuko having a size corresponding to a pin joint whose outer diameter differs depending on the steel pipe diameter and thickness of the steel pipe pile and steel pipe sheet pile.

JP 2000-319874 A

  The present invention has been made in view of the above-mentioned circumstances, and the same yatko can be connected even to steel pipe piles having different diameters, and in that case, a series of steel pipe piles and steel pipe sheet piles whose axial center alignment is easy and the same An object of the present invention is to provide a Yatko that can be attached to and removed from steel pipe piles and steel pipe sheet piles belonging to the series.

  The characteristic features of the series of steel pipe piles and steel pipe sheet piles according to the present invention for achieving the above object are a series of steel pipe piles and steel pipe sheet piles expanded with different steel pipe diameters or steel pipe thicknesses. A mechanical joint having a size corresponding to the diameter of the steel pipe and a thickness of the steel pipe is provided at an end portion of the steel pipe, and the mechanical joint is provided on one of the two steel pipes connected to each other. The first joint and the second joint have a first joint and a second joint provided to the other steel pipe, and are engaged with an outward recess provided on the first joint, An inward convex portion for preventing separation in the axial direction of the steel pipe is provided, and the steel pipe diameter and the steel pipe thickness of the steel pipe provided with the first joint are provided on a part of the outer peripheral surface of the first joint. An outward reference surface in which the distance from the axial center of the steel pipe is set constant In that it has a steel pipe group is provided.

  According to the above-described configuration, since the key member can be moved by the position fixing mechanism, the key member can take a plurality of straddle positions. As such, the yatko is sized to be enveloped by the yatko, and the outwardly facing recess can be attached to the first joint in a position where the key member can be pushed.

  Therefore, YATCO is provided, for example, in a steel pipe group in which at least one of a steel pipe diameter and a steel pipe thickness belonging to a series of steel pipe piles and steel pipe sheet piles developed with different steel pipe diameters or steel pipe thicknesses different. It can be attached and detached to one joint.

  A part of the outer peripheral surface of the first joint faces the outward reference surface of which the distance from the axial center of the steel pipe is set constant, regardless of the diameter and thickness of the steel pipe provided with the first joint By mounting the inward reference surface to the first joint, the inward reference surface and the outward reference surface are fitted with each other by the use of the inward reference surface provided with the inboard reference surface, and the axial center alignment between the Jatco and the first joint is achieved. Will be done automatically.

  In addition, an outward recessed part means the recessed part open | released by the radial direction outward of the steel pipe, and an inward recessed part means the recessed part open | released by the radial direction of the steel pipe. Moreover, an inward convex part means the convex part which protruded in the radial direction of the steel pipe.

  In the present invention, the first joint is a pin joint, the second joint is a box joint, the outward concave portion is provided on the outer peripheral surface of the pin joint, and the inward convex portion is the outer side. And a load transfer key disposed across the inward recess provided in the inner circumferential surface of the box joint, the outward reference surface being the outward recess of the outer circumferential surface of the pin joint Are preferably provided at different positions.

  According to the above-described configuration, the pin joint can be provided with the outward reference surface while maintaining the configuration of the mechanical joint.

  In the present invention, the distance from the axial center of the steel pipe is not dependent on the diameter and thickness of the steel pipe provided with the box joint at a position different from the inward recess on the inner circumferential surface of the box joint. The steel pipe pile group is provided with an inward fitting surface set equal to the distance from the axial center of the steel pipe of the outward reference surface, and the inward fitting surface is the inner circumference of the box joint Preferably, the outboard reference surface is provided at a tip end portion of the surface, and the outward reference surface constitutes an outward engagement surface provided at a position facing the inward engagement surface in the outer peripheral surface of the pin joint.

  According to the above configuration, when the pin joint and the box joint are connected, the outward fitting surface and the inward fitting surface are engaged.

  In order to achieve the above-mentioned object, the characteristic constitution of Yatsuko of the present invention belongs to the series of steel pipe piles and steel pipe sheet piles having any of the above characteristic structures, and a steel pipe group having different steel pipe diameters or steel pipe thicknesses. And a main body portion capable of enclosing a portion of the first joint provided with the outwardly facing recess, and an inner peripheral surface of the main body portion. Among the members, an inward recess provided at a position facing the outward recess, and a retaining key which can be arranged at a straddle position across the outward recess provided in the first joint, the outward recess A position fixing mechanism capable of fixing the retaining key at the straddling position is provided even if the first joint has different outer diameters of the portion where the portion is provided, and the inner peripheral surface of the main body portion is provided , Said first joint It lies in that inwardly reference surface fittable is provided outwardly reference surface provided in a part of the outer circumferential surface.

  According to the above-mentioned configuration, the attachment of the Yatko to the first joint causes the inward reference surface and the outward reference surface to be fitted, and the axial alignment of the Yatko and the first joint is made automatic.

  The characteristic features of the series of steel pipe piles and steel pipe sheet piles according to the present invention for achieving the above object are a series of steel pipe piles and steel pipe sheet piles expanded with different steel pipe diameters or steel pipe thicknesses. A mechanical joint having a size corresponding to the diameter of the steel pipe and a thickness of the steel pipe is provided at an end portion of the steel pipe, and the mechanical joint is provided on one of the two steel pipes connected to each other. The first joint and the second joint have the first joint and the second joint provided to the other steel pipe, and are engaged with the inward recess provided in the second joint, An outward convex portion for preventing separation in the axial direction of the steel pipe is provided, regardless of the diameter and thickness of the steel pipe provided with the first joint on a part of the inner peripheral surface of the second joint. Inward reference plane where the distance from the shaft center of the steel pipe is set constant It is preferable to have the steel pipe group is provided.

  According to the above-described configuration, since the key member can be moved by the position fixing mechanism, the key member can take a plurality of straddle positions. Therefore, the Yatko is sized to surround the Yatko, and the inward recess can be attached to the second joint in a position where the key member can be pushed.

  Therefore, YATCO is provided, for example, in a steel pipe group in which at least one of a steel pipe diameter and a steel pipe thickness belonging to a series of steel pipe piles and steel pipe sheet piles developed with different steel pipe diameters or steel pipe thicknesses different. It can be attached and detached to two joints.

  Relative to the inward reference surface in which the distance from the axial center of the steel pipe is set constant regardless of the diameter and thickness of the steel pipe provided with the second joint on a part of the inner peripheral surface of the second joint By using the Yatko provided with the outward reference surface, the outward reference surface and the inward reference surface are fitted by attaching the Yatko to the second joint, and the axial center of the Yatko and the second joint is obtained. Alignment will be done automatically.

  In addition, an outward recessed part means the recessed part open | released radially outward, and an inward recessed part means the recessed part open | released radially inward. Moreover, an outward convex part means the convex part which protruded in the radial direction outward.

  In the present invention, the first joint is a pin joint, the second joint is a box joint, the inward concave portion is provided on the inner circumferential surface of the box joint, and the outward convex portion is The inward recess and the load transfer key disposed across the outward recess provided on the outer circumferential surface of the pin joint, the inward reference surface is the inward recess of the inner circumferential surface of the box joint Is preferably provided at a different position.

  According to the above-described configuration, the box joint can be provided with an inward reference surface while maintaining the configuration of the mechanical joint.

  In the present invention, the distance from the axial center of the steel pipe, regardless of the diameter and thickness of the steel pipe provided with the pin joint, at a position different from the outward recess on the outer peripheral surface of the pin joint It has a steel pipe pile group provided with an outward fitting surface set equal to the distance from the axial center of the steel pipe of the inward reference surface, and the inward reference surface is the inner circumferential surface of the box joint Preferably, the inward fitting surface is provided at the tip end portion, and the outward fitting surface is provided at a position facing the inward fitting surface in the outer peripheral surface of the pin joint. is there.

  According to the above configuration, when the box joint and the pin joint are connected, the inward fitting surface and the outward fitting surface are fitted.

  In order to achieve the above-mentioned object, the characteristic constitution of Yatsuko of the present invention belongs to the series of steel pipe piles and steel pipe sheet piles having any of the above characteristic structures, and a steel pipe group having different steel pipe diameters or steel pipe thicknesses. And a main body portion that can be enclosed by a portion provided with the inward recessed portion of at least the second joint, and an outer peripheral surface of the main body portion. Among the inward recess that can be disposed at the straddle position across the outward recess provided at the position facing the inward recess and the inward recess provided in the second joint, and the inward recess A position fixing mechanism for fixing the retaining key at a straddle position straddling the outward recess and the inward recess even if the second joint has a different inner diameter of the provided portion, is provided. , Said The outer peripheral surface of the body is that a mateable outward reference surface is provided on the inner facing reference surface provided in a part of the inner peripheral surface of the second joint.

  According to the above-described configuration, the attachment of the Yatko to the second joint causes the outward reference surface and the inward reference surface to be fitted, and the axial alignment of the Yatko and the second joint is automatically made.

An explanatory view of a steel pipe pile belonging to a series of steel pipe piles according to the present invention Explanatory drawing of steel pipe pile during vibration method Explanatory drawing of the Yatsuko and pin joint concerning the present invention Explanatory drawing of the principal part of Yatsuko concerning the present invention Explanatory drawing of the principal part of Yatsuko concerning the present invention Explanatory drawing of the principal part of Yatsuko concerning the present invention Explanatory drawing of the principal part of Yatsuko concerning the present invention Explanatory drawing of the yatsuko and box joint concerning the present invention Explanatory drawing of the principal part of Yatsuko concerning the present invention Explanatory drawing of the principal part of Yatsuko concerning the present invention Explanatory drawing of the principal part of Yatsuko concerning the present invention Explanatory drawing of the principal part of Yatsuko concerning the present invention Illustration of pull back member Illustration of pull back member Illustration of pull back member Illustration of pull back member Explanatory drawing of the attachment to the pin joint of Yatsuko which concerns on this invention Explanatory drawing of the Yatsuko and pin joint concerning the present invention Explanatory drawing of the Yatsuko and pin joint concerning the present invention

  Hereinafter, a series of steel pipe piles and steel pipe sheet piles according to the present invention, and an embodiment of Yatko detachable from the steel pipe piles and steel pipe sheet piles belonging to the series will be described based on the drawings. The steel pipe pile P (P1, P2) is shown by FIG. 1 as an example of the steel pipe pile which belongs to the series of the steel pipe pile which can attach and detach.

  The steel pipe pile P (P1, P2) is coupled in a retaining state and a detent state by a mechanical joint J provided at an end of the steel pipe S (S1, S2). The steel pipe S may be a spiral steel pipe, a welded pipe such as a UO steel pipe, a seamless steel pipe, a forged steel pipe, a cast steel pipe or the like.

  The mechanical joint J includes a box joint 10 provided at an end of the steel pipe S (S1, S2), a pin joint 20, a load transfer key 30, and a set bolt 31.

  As shown in FIGS. 1 and 8, the box joint 10 is provided with a single inward groove portion 12 along the circumferential direction on the inner circumferential surface 11 thereof. The load transfer key 30 stored in the inward groove portion 12 is configured to be able to advance and retract in the radial direction by the rotation of the set bolt 31. The inward groove 12 has a depth capable of storing the entire thickness of the load transfer key 30. Furthermore, at the edge of the outer circumferential surface 13 of the box joint 10, a plurality of second notch recesses 14 are provided at equal intervals at intervals in the circumferential direction.

  As shown in FIGS. 1 and 3, in the pin joint 20, a single outward groove 22 is provided along the circumferential direction at a position facing the inward groove 12 provided in the box joint 10 in the outer peripheral surface 21 thereof. It is done. The outward groove portion 22 is configured to have a depth capable of storing approximately half of the thickness of the load transfer key 30. Furthermore, a completely recessed portion 24 is provided at the edge of the outer peripheral surface 23 of the pin joint 20 at a position opposed to the second cutout portion 14 provided in the box joint 10.

  The load transfer key 30 is configured by dividing a plurality of arc-shaped plates in the circumferential direction. The box joint 10 is provided with a through hole 15 communicating from the outer peripheral surface 13 into the inward groove 12 corresponding to each load transfer key 30. Each through hole 15 is provided with a set bolt 31.

  When the set bolt 31 is rotated after inserting the pin joint 20 into the box joint 10, the load transfer key 30 stored in the inward groove portion 12 of the box joint 10 enters the outward groove portion 22 of the pin joint 20, The box joint 10 and the pin joint 20 are connected in a retaining manner by being arranged so as to straddle the inward groove portion 12 and the outward groove portion 22.

  A key groove is formed by the second notch recess 14 and the first recess 24 and the rotation suppressing key 33 is attached to the key groove, whereby the box joint 10 and the pin joint 20 are connected in a detent state. The relative rotation of the two joined steel pipe piles P (P1, P2) is prevented. The rotation restraining key 33 is fixed in the key groove by a fixing screw 34 screwed into a screw hole provided in the pin joint 20.

  The box joint 10 in the present embodiment is the second joint according to the present invention, the inward groove 12 is the inward recess according to the present invention, and the pin joint 20 is the first joint according to the present invention. Reference numeral 22 denotes an outward concave portion according to the present invention, and the load transfer key 30 is an inward convex portion according to the present invention and an outward convex portion.

  In driving such a steel pipe pile P by a vibration method in which vibration is applied to the ground while applying vibration by a vibrator hammer, as shown in FIG. 2, a pin of the steel pipe pile P is suspended by a vibro chuck C suspended by a crane K In order to avoid directly gripping the joint 20 and the box joint 10, the Yatko Y according to the present invention is used.

  The steel pipe pile P can also be driven so that the box joint 10 is on the front side in the direction of travel, and can be driven so that the pin joint 20 is on the front side in the direction of travel.

  Here, when the box joint 10 is driven so as to be on the front side in the traveling direction, the Yatko Y1 configured to be detachable from the pin joint 20 on the rear side in the driving direction will be described.

  As shown in FIG. 3, the Yatsuko Y1 has a cylindrical main body 40 that can surround the outer circumferential surface 21 in which the outward groove 22 of the pin joint 20 is provided.

  An inward groove portion 42 is provided at a position facing the outward groove portion 22 of the pin joint 20 in the inner peripheral surface 41 of the main body portion 40. The inward groove portion 42 in the present embodiment is an inward recess according to the present invention. An opening 49 communicating with the inward groove 42 is provided in the main body 40 of the Yatsuko Y1.

  As shown in FIG. 4, the Yatsuko Y1 is provided with a retaining key 44 which is disposed across the inward groove portion 42 and the outward groove portion 22 and prevents the pin joint 20 from coming off.

  Similar to the load transfer key 30, the retaining key 44 is configured by dividing a plurality of arc-shaped plates in the circumferential direction. As shown in FIGS. 13 and 15, each retaining key 44 is provided with a recess 47 capable of engaging with a ball of a ball plunger 46 described later. One end of the locking key 44 is formed in an L shape, and a radius is provided inside the corner for the purpose of improving the durability.

  A through hole 45 is provided along the radial direction of the steel pipe pile P in the main body portion 40 of the Yatko Y1. The ball plunger 46 is screwed into the through hole 45. The through hole 45 and the ball plunger 46 in the present embodiment are the position fixing mechanism according to the present invention.

  In the ball plunger 46, a spring is incorporated in the main body, and when a load is applied to the ball at the tip, the ball sinks into the inside of the main body against the biasing force of the spring and the load is released by the biasing force of the spring. The ball is configured to return to its original position.

  A position where the ball plunger 46 straddles the inward groove 42 and the outward groove 22 provided in the pin joint 20 from the storage position (see FIG. 4) in which the retaining key 44 is stored in the inward groove 42 (See FIG. 5) and can be fixed in this position.

  When the ball plunger 46 moves inward in the radial direction of the steel pipe pile P, the male screw provided on the main body of the ball plunger 46 is screwed into the female screw provided on the through hole 45. It can protrude from the inward groove portion 42 of the Yatsuko Y1. By changing the projecting length of the ball plunger 46, the retaining key 44 can take a plurality of straddling positions.

  Therefore, if Yatko Y1 is a pin joint 20 of a size that can be surrounded by Yatko Y1, the outward facing groove portion 22 is a pin joint 20 at a position where the ball plunger 46 can push in the retaining key 44. The pin joint 20 provided in the steel pipe which belongs to the steel pipe pile P where the steel pipe diameter and the steel pipe thickness difference are developed in series can be attached to and detached from the pin joint 20 having different diameters and thicknesses.

  Therefore, as shown in FIG. 5 and FIG. 6, in a series of steel pipe piles with a steel pipe diameter of 1600400 to 1600 mm and a steel pipe thickness of 9 to 30 mm, two patterns of pin joints differ in radius of outer peripheral surface 21 by about several mm 20 and 201, if the inner diameter of the inner peripheral surface 41 of the Yatko Y1 is large enough to surround the pin joint 20 having the larger outer diameter, the retaining key 44 has the smaller outer diameter Even in the outward groove portion 22 of the joint 201, the Yatko Y1 can use either of the pin joints 20, as long as it is configured to take a straddle position straddling the outward groove portion 22 and the inward groove portion 42. It can be attached and detached to 201, too.

  As shown in FIGS. 5 and 6, the gap between the outer peripheral surface 21 of the pin joint 201 and the inner peripheral surface 41 of the Yatko Y1 when the Yatko Y1 is attached to the pin joint 201 is the Yatko Y1 attached to the pin joint 20. It is larger than the gap between the outer peripheral surface 21 of the pin joint 20 and the inner peripheral surface 41 of the Yatko Y1 when attached.

  Of the series of steel pipe piles, for example, the diameter of the steel pipe of the steel pipe provided with the pin joint 20, 201 on a part of the outer peripheral surface 21 of the pin joint 20, 201. The outward reference surface 26 in which the distance from the axial center of the steel pipe is set to be constant regardless of the thickness of the steel pipe is preferably at a position different from the outward groove 22, preferably on the outer peripheral surface 21 of the pin joint 20, 201. It is provided on the proximal end side. In the present embodiment, the outward reference surface 26 of the pin joint 20 is flush with the outer circumferential surface 21. The outward reference surface 26 constitutes an outward fitting surface that can be fitted with the inward fitting surface 16 provided in the box joint 10.

  Corresponding to this, the inward reference surface 410 which can be fitted to the outward reference surface 26 is provided in the Yatko Y1. In the present embodiment, the inward reference surface 410 of the Yatko Y1 is flush with the inner circumferential surface 41. The attachment of the Yatko Y1 to the pin joints 20 and 201 causes the inward reference surface 410 and the outward reference plane 26 to be fitted, and the axial alignment of the Yatko Y1 and the pin joints 20 and 201 is automatically made.

  In the steel pipe pile group belonging to the series of steel pipe piles, the distance from the axial center of the steel pipe, regardless of the steel pipe diameter and thickness of the steel pipe provided with the box joint 10, is the axis of the steel pipe of the outward reference surface 26 The inward fitting surface 16 set to be the same as the distance from the center is the tip end side of the box joint 10, 101, and a position different from the inward groove portion 12 of the inner circumferential surface 11 and the pin joint 20, It is provided at a position opposite to the outward reference surface 26 of 201.

  Thereby, as shown in FIG. 1, when the pin joint 20 and the box joint 10 are connected, the outward reference surface 26 and the inward engagement surface 16 which constitute the outward engagement surface are engaged. . In addition, also when the pin joint 201 and the box joint 101 are connected, the outward reference surface 26 and the inward fitting surface 16 which comprise an outward fitting surface are fitted.

  Thus, the mechanical joint can be provided with the outward reference surface 26 and the inward fitting surface 16 while leaving the configuration as the mechanical joint.

  The depth of the inward groove 42 provided in the main body 40 is set deeper than the depth of the inward groove 12 provided in the box joint 10, and the thickness of the retaining key 44 is larger than the thickness of the load transfer key 30 By making the lengths of the through hole 45 and the ball plunger 46 sufficiently long, it is possible to increase the margin of change of the projection length of the retaining key 44 from the inward groove portion 42.

  When the steel pipe pile P is driven in by the vibration method, the retaining key 44 holding off the steel pipe pile P and the Yatko Y1 is also vibrated by a high frequency. If a simple bolt is used for the position fixing mechanism, the bolt may be loosened due to high frequency vibration, and the position of the retaining key 44 may be displaced, which may cause the detachment prevention to be released.

  On the other hand, since the ball plunger 46 is used for the position fixing mechanism as described above, the spring incorporated in the ball plunger 46 can absorb the vibration, as described above. Therefore, the ball plunger 46 does not loosen. Therefore, the retaining key 44 is maintained at the straddle position where it can be secured. In addition, there is no possibility that the contact positions of the balls will shift due to the balls of the ball plungers 46 engaging with the recesses 47 provided in the retaining keys 44.

  In the edge of the outer peripheral surface 43 of the Yatsuko Y1, a main body notched concave portion 48 is provided at a position facing the first concave portion 24 provided in the pin joint 20. By interposing the above-mentioned rotation restraining key 33 in the key groove constituted of the first concave portion 24 and the main body concave portion 48, the Yatko Y1 and the pin joint 20 relatively rotate around the axis. Being prevented.

  A procedure for attaching the Yatko Y1 configured as described above to the pin joint 20 will be described. First, the rotation restraining key 33 is attached to the first recessed portion 24 of the pin joint 20 of the steel pipe pile P whose side of the box joint 10 has been driven into the ground. Next, the Yatko Y1 gripped by the vibrator is hung down on the pin joint 20. At that time, the rotation restraining key 33 and the main body notch recessed portion 48 are fitted, and the Yatko Y1 and the pin joint 20 are fixed in the circumferential direction, and the inward reference surface 410 and the outward reference surface 26 are engaged. Thus, the axial alignment of the Yatko Y1 with the pin joint 20 is automatically made.

  Next, the retaining key 44 is inserted from the front end through the opening 49 of the main body 40 of the Yatko Y1, along the key groove composed of the inward groove 42 and the outward groove 22 provided in the pin joint 20. Then, it is slid in the circumferential direction to a position where the recess 47 of the retaining key 44 matches the through hole 45.

  Then, as shown in FIG. 17, the ball plunger 46 is screwed into the through hole 45 and moved inward in the radial direction of the steel pipe pile P, and the retaining key 44 is provided on the inward groove portion 42 and the yatko Y1. It fixes to the straddle position which straddles with the direction groove part 22 reliably.

  Thereafter, a buffer material is sandwiched between the retaining keys 44 facing each other in the circumferential direction inside the opening 4, and the opening 49 is made of aluminum tape, for example, in order to prevent sand from entering the keyway from the opening 49. By closing, the attachment of YATCO Y1 to the pin joint 20 of the steel pipe pile P is completed.

  Yatko Y1 needs to be removed from the pin joint 20 of the steel pipe pile P after the steel pipe pile P to which it is attached is driven into a predetermined depth. As shown in FIG. 7, a hexagonal bolt as a retracting member can be screwed into the female screw provided in the recess 47 of the retaining key 44 so that the retaining key 44 can be easily pulled back from the straddle position to the storage position . The retracting member is not limited to a bolt member such as a hexagonal bolt, and may be a screw member such as, for example, a cut-off bolt as long as it can be screwed to an internal thread provided on the retaining key 44.

  As described above, the connection of the Yatko Y1 to the steel pipe pile P is easily released by moving the retaining key 44 from the straddle position to the storage position by the retracting member, whereby the Yatko Y1 can be removed from the steel pipe pile P. it can.

  In the embodiment described above, although the case where the outward recess is the single outward groove portion 22 provided along the circumferential direction on the outer circumferential surface 21 of the pin joint 20 has been described, the invention is not limited thereto. The outward recess does not have to extend around the outer peripheral surface 21 along the circumferential direction, and may be an outward groove intermittently provided on the outer peripheral surface 21 of the pin joint 20. In addition, the outwardly facing recess need not be in the form of a groove, but may be in the form of a recess. It may be any shape as long as the load transfer key 30 as the inward convex portion can be engaged.

  In the embodiment described above, the case is described where the inward recessed portion is a single inward groove portion 42 provided along the circumferential direction on the inner circumferential surface 41 of the main body 40 of the Yatko Y1, but this is limited Absent. The inward recessed portion does not have to extend around the inner circumferential surface 41 along the circumferential direction, and may be an inward groove portion provided intermittently in the inner circumferential surface 41 of the main body 40. In addition, the inward recess does not have to be in the form of a groove, and may be in the form of a recess. It may be any shape as long as the retaining key 44 can be engaged.

  In the embodiment described above, the outward reference surface 26 is provided on the outer circumferential surface 21, but as shown in FIGS. 18 and 19, the outward reference surface 26 may be provided on the outer circumferential surface 23. FIG. 18 shows that Yatko Y1 is attached to pin joint 20 having the larger outer diameter, and FIG. 19 shows that Yatko Y1 is attached to pin joint 201 having the smaller outer diameter. It is shown. Whether the pin joint 20 has a large outer diameter or the pin joint 201 having a small outer diameter, the outward reference surface 26 is set to have the same distance from the axial center of the steel pipe. In the Yatko Y1, the inward reference surface 410 is provided at a position opposite to the outward reference surface 26.

  In the embodiment described above, the position fixing mechanism is described to have the ball plunger 46, but the invention is not limited to this. The position locking mechanism may have a pin plunger instead of the ball plunger 46.

  Next, when the pin joint 20 is driven so as to be on the front side in the traveling direction, the Yatko Y2 configured to be attachable to and detachable from the box joint 10 on the rear side in the driving direction will be described.

  As shown in FIG. 8, the Yatko Y 2 has a shaft-like main body 50 that can be surrounded by the inner circumferential surface 11 in which the inward groove 12 of the box joint 10 is provided.

  An outward groove 52 is provided at a position facing the inward groove 12 of the box joint 10 in the outer circumferential surface 51 of the main body 50. The outward groove portion 52 in the present embodiment is an outward concave portion according to the present invention. The main body 50 of the Yatsuko Y 2 is provided with an opening 59 communicating with the outward groove 52.

  As shown in FIG. 9, the Yatsuko Y 2 is provided with a retaining key 54 which is disposed across the outward groove portion 52 and the inward groove portion 12 and prevents the box joint 10 from coming off.

  Similar to the load transfer key 30, the retaining key 54 is configured by dividing a plurality of arc-shaped plates in the circumferential direction. Each retaining key 54 is provided with a recess 57 to which the ball of the ball plunger 56 described later can be engaged. One end of the locking key 54 is formed in an L shape, and a radius is provided inside the corner for the purpose of improving the durability.

  A through hole 55 is provided in the main body portion 50 of the Yatko Y 2 along the radial direction of the steel pipe pile P. The ball plunger 56 is screwed into the through hole 55. The through hole 55 and the ball plunger 56 in the present embodiment are the position fixing mechanism according to the present invention. The ball plunger 56 has the same configuration as the ball plunger 46, and can achieve the same function and effect.

  A position where the ball plunger 56 straddles the outward groove 52 and the inward groove 12 provided in the box joint 10 from the storage position (see FIG. 9) in which the retaining key 54 is stored in the outward groove 52 10) and fixed in this position.

  When the ball plunger 56 moves outward in the radial direction of the steel pipe pile P, the male screw provided on the main body of the ball plunger 56 is screwed into the female screw provided in the through hole 55. It can project from the outward groove 52 of the Yatsuko Y2. By changing the projecting length of the ball plunger 56, the retaining key 54 can take a plurality of straddling positions.

  Therefore, if Yatko Y2 is a box joint 10 sized to surround Yatko Y2 and the inward groove portion 12 is a box joint 10 in a position where the ball plunger 56 can push in the retaining key 54. It is possible to attach and detach to the box joint 10 having different diameters and thicknesses provided in the steel pipe pile P belonging to the steel pipe pile P in which the steel pipe diameter and the steel pipe thickness difference are developed in series.

  Therefore, in a series of steel pipe piles such as steel pipe diameter Φ400 to 1600 mm and steel pipe thickness 9 to 30 mm, as shown in FIGS. 10 and 11, two patterns of boxes having different radii of the inner circumferential surface 11 by about several mm If, with respect to the joint 10, the outer diameter of the outer circumferential surface 51 of the Yatko Y 2 is such that it can be enclosed by the box joint 101 with the smaller inner diameter, the retaining key 54 of the box joint 10 with the larger inner diameter. Even in the inward groove portion 12, the Yatko Y 2 can be mounted on either of the box joints 10 and 101 as long as the inward groove portion 12 and the outward groove portion 52 can be provided with a straddle position. It can be attached and detached.

  As shown in FIGS. 10 and 12, the gap between the inner peripheral surface 11 of the box joint 10 and the outer peripheral surface 51 of the Yatko Y2 when the Yatko Y2 is attached to the box joint 10 is the box joint 101 with the Yatko Y2. It is larger than the gap between the inner circumferential surface 11 of the box joint 101 and the outer circumferential surface 51 of the Yatko Y 2 when attached.

  The steel pipe diameter of the steel pipe in which the box joint 10, 101 is provided in a part of the inner peripheral surface 11 of the box joint 10, 101 in the box joint 10, 101 to which the same Yatsuko Y2 can be attached or detached, for example And the inward reference surface 16 in which the distance from the axial center of the steel pipe is set to be constant regardless of the thickness of the steel pipe, preferably at a position different from the inward groove 12, preferably the inner peripheral surface of the box joint 10, 101 It is provided on the tip end side of 11. In the present embodiment, the inward reference surface 16 of the box joint 10 is flush with the inner circumferential surface 11. The inward reference surface 16 constitutes an inward fitting surface that can be fitted with the outward fitting surface 26 provided on the pin joint 20.

  Corresponding to this, the outward facing reference surface 510 which can be fitted to the inward facing reference surface 16 is provided in the Yatsuko Y2. The attachment of the Yatko Y2 to the box joint 10, 101 causes the outward reference surface 510 and the inward reference surface 16 to be fitted, and the axial alignment of the Yatko Y2 with the box joint 10, 101 is automatically made.

  In the steel pipe pile group belonging to the series of steel pipe piles, the distance from the axial center of the steel pipe, regardless of the steel pipe diameter and thickness of the steel pipe provided with the pin joints 20 and 201, is the steel pipe of the inward reference surface 16. The outward fitting surface 26, which is set equal to the distance from the axis of the shaft, is the base end side of the pin joints 20, 201, and is a position different from the outward groove 22 of the outer peripheral surface 21 and the box joint It is provided at a position opposite to the inward reference surface 16 of 10, 101.

  By this, as shown in FIG. 1, when the pin joint 20 and the box joint 10 are connected, the inward reference surface 16 and the outward fitting surface 26 constituting the inward fitting surface are fitted. . Also when the pin joint 201 and the box joint 101 are connected, the inward reference surface 16 and the outward fitting surface 26 constituting the inward fitting surface are fitted.

  In this manner, the mechanical joint can be provided with the inward reference surface 16 and the outward fitting surface 26 while leaving the configuration as the mechanical joint.

  The depth of the outward groove 52 provided in the main body 50 is made deeper than the depth of the inward groove 12 provided in the box joint 10, and the thickness of the retaining key 54 is made thicker than the thickness of the load transfer key 30 By making the lengths of the through hole 55 and the ball plunger 56 sufficiently long, it is possible to increase the margin of change of the projection length of the retaining key 54 from the outward groove portion 52.

  When the steel pipe pile P is driven in by the vibration method, the retaining key 54 for preventing the steel pipe pile P and the Yatko Y2 from falling off is also vibrated by high frequency. If a simple bolt is used for the position fixing mechanism, the bolt may be loosened due to high frequency vibration, and the position of the retaining key 54 may be displaced, which may cause the detachment prevention to be released.

  On the other hand, since the ball plunger 56 is used for the position fixing mechanism as described above, the spring incorporated in the ball plunger 56 can absorb the vibration as described above. Therefore, the ball plunger 56 does not loosen. Therefore, the retaining key 54 is maintained at the straddle position where it can be secured. In addition, there is no possibility that the contact positions of the balls will shift due to the balls of the ball plungers 56 engaging with the recesses 57 provided in the retaining keys 54.

  In the edge of the outer peripheral surface 53 of the Yatsuko Y2, a main body notched concave portion 58 is provided at a position facing the second notched concave portion 14 provided in the box joint 10. By interposing the above-mentioned rotation restraining key 33 in the key groove constituted by the second notch recess 14 and the main body notch recess 58, the Yatko Y2 and the box joint 10 relatively rotate around the axis. Is prevented.

  A procedure for attaching the Yatko Y2 configured as described above to the box joint 10 will be described. First, the rotation restraining key 33 is attached to the second notch concave portion 14 of the box joint 10 of the steel pipe pile P in which the pin joint 20 side is driven into the ground. Next, the Yatko Y2 gripped by the vibro chuck is hung down on the box joint 10. At that time, the rotation restraining key 33 and the main body notch concave portion 58 are fitted, and the Yatko Y2 and the box joint 10 are fixed in the circumferential direction, and the outward reference surface 510 and the inward reference surface 16 are engaged. Thus, the axial alignment of the Yatko Y 2 and the box joint 10 is automatically made.

  Next, the retaining key 54 is inserted from the front end through the opening 59 of the main body 50 of the Yatko Y2, and along the key groove composed of the outward groove 52 and the inward groove 12 provided in the box joint 10. Then, it is slid in the circumferential direction to a position where the recess 57 of the retaining key 54 matches the through hole 55.

  Then, the ball plunger 56 is screwed into the through hole 55, moved outward in the radial direction of the steel pipe pile P, and straddling the retaining key 54 across the outward groove 52 and the inward groove 12 provided in the Yatoko Y2. Securely fix at the installation position.

  After that, a buffer material is sandwiched between the retaining keys 54 facing in the circumferential direction inside the opening 59, and the opening 59 is made of, for example, an aluminum tape in order to prevent sand from entering the keyway from the opening 59. By closing, the attachment of YATCO Y2 to the box joint 10 of the steel pipe pile P is completed.

  Yatko Y2 needs to be removed from the box joint 10 of the steel pipe pile P after driving it to a predetermined depth. As shown in FIG. 11, the female screw provided in the recess of the retaining key 54 is screwed with a hexagonal bolt as a retracting member so that the retaining key 54 can be easily pulled back from the straddle position to the storage position. The retracting member is not limited to a bolt member such as a hexagonal bolt, and may be a screw member such as, for example, a cut-off bolt as long as it can be screwed to a female screw provided in the retaining key 54.

  Thus, the connection of the Yatko Y2 to the steel pipe pile P is easily released by moving the retaining key 54 from the straddle position to the storage position by the retracting member, whereby the Yatko Y2 can be removed from the steel pipe pile P. it can.

  In the embodiment described above, the case has been described where the inward recess is a single inward groove portion 12 provided along the circumferential direction on the inner circumferential surface 11 of the box joint 10, but the invention is not limited thereto. The inward recess does not have to be formed on the inner circumferential surface 11 in the circumferential direction, and may be an inward groove portion intermittently provided on the inner circumferential surface 11 of the box joint 10. In addition, the inward recess does not have to be in the form of a groove, and may be in the form of a recess. It may be any shape as long as the load transfer key 30 as the outward convex portion can be engaged.

  In the embodiment described above, although the case was described where the outward recess is a single outward groove portion 52 provided along the circumferential direction on the outer peripheral surface 51 of the main body 50 of the Yatko Y2, the invention is not limited thereto. . The outward recess does not have to extend around the outer peripheral surface 51 along the circumferential direction, and may be an outward groove intermittently provided on the outer peripheral surface 51 of the main body 50. In addition, the outwardly facing recess need not be in the form of a groove, but may be in the form of a recess. It may be any shape as long as the retaining key 54 can be engaged.

  In the embodiment described above, the position fixing mechanism is described to have the ball plunger 56, but the invention is not limited to this. The position locking mechanism may have a pin plunger instead of the ball plunger 56.

  In the above-described embodiment, as shown in FIGS. 7 and 11, the female screws provided in the respective recesses 47 and 57 of the retaining key 44 and the retaining key 54 are screwed with a hexagonal bolt as a withdrawal member. Although the configuration in which the retaining key 44 and the retaining key 54 are moved from the straddle position to the storage position has been described, the present invention is not limited thereto.

  For example, as shown in FIGS. 13 and 14, an undercut portion 61 is provided in the recess 47 so that the hooked member 60 can be engaged as a pullback member for pulling back the retaining key 44 from the straddle position to the storage position. May be

  As shown in FIG. 13, the bowl-like member 60 is a rod-like member whose distal end is formed wide in one direction orthogonal to the axis thereof. The recess 47 has a passage corresponding to a wide tip and an undercut-shaped portion 61 formed of a space which spreads at the back of the passage, and the wedge member 60 is inserted into the recess 47 as shown in FIG. By turning the wide end, the wide end engages with the undercut shape 61, and thereby the retaining key 44 can be pulled back from the straddle position to the storage position.

  Further, as shown in FIGS. 15 and 16, the wedge-shaped member 62 can be configured to have a wide end in two directions orthogonal to its axis, and in this case, the undercut shape portion 63 also has It is configured in a corresponding shape. The configurations of the wedge-shaped members 60 and 62 and the undercut shaped portions 61 and 63 can also be applied to the retaining key 54.

  The number of inward groove portions 12 and outward groove portions 22 provided in the mechanical joint J provided in the steel pipe pile P which is an object of attachment and detachment of the Yatsuko Y according to the present invention is not limited to one. There may be two or more articles. The Yatsuko Y may also have a plurality of inward grooves 42 and outward grooves 52 correspondingly.

  In the embodiment described above, the outward reference surface 26 is provided to go around the outer peripheral surface 21, the inward reference surface 410 is provided to go around the inner peripheral surface 41, and the inward reference surface 16 is taken on the inner circumference. The configuration has been described in which the outer reference surface 510 is provided to go around the outer surface 51, but the outer reference surface 26 is placed on a part of the periphery of the outer surface 21. The inward reference surface 410 is provided on a part of the periphery of the inner peripheral surface 41, the inward reference surface 16 is provided on a part of the periphery of the inner peripheral surface 11, and the outward reference surface 510 is It may be configured to be provided in part of the periphery.

  The mechanical joint J provided in the steel pipe pile P belonging to the series of steel pipe piles according to the present invention may not necessarily have the rotation restraining key 33.

  Furthermore, the mechanical joint J provided in the steel pipe pile which is an object of attachment or detachment of Yatsuko Y which concerns on this invention is not restricted to the structure which has the box joint 10 and the pin joint 20. FIG. For example, the mechanical joint J is configured such that pin joints are provided at both ends of the steel pipe S, and in a state in which both pin joints are abutted, the periphery is surrounded by a cylindrical joint composed of a plurality of divided bodies. May be In this case, the inward convex portion does not have to be the load transmission key 30 which is configured separately from the pin joint or the cylindrical joint, and is a key portion integrally provided on the cylindrical joint. It may be. In the steel pipe pile having such a mechanical joint, the above-mentioned Yatko Y1 can be attached to and detached from the pin joint at either end of the steel pipe pile P.

  In the embodiment described above, the case where Yatko Y is attached to and detached from the steel pipe pile P belonging to the series of steel pipe piles developed with at least either of steel pipe diameter or steel pipe thickness different has been described. The Yatko Y can be attached to and detached from a steel pipe sheet pile belonging to a series of steel pipe sheet piles developed with at least one made different.

  In the embodiment mentioned above, although steel pipe pile P which is an object of attachment or detachment of Yatsuko Y which concerns on this invention was explained by the vibration construction method by driving construction, it does not restrict to this. The Yatsuko Y according to the present invention can also be used when the steel pipe pile P is driven and installed by a method such as a turning method, a middle digging method, and a pre-boring method.

  The embodiments described above are all examples of the present invention, and the present invention is not limited by the description, and the specific configuration of each part can be appropriately modified and designed within the range where the effects of the present invention can be exhibited. is there.

10: Box joint 101: Box joint 11: Inner circumferential surface 12: Inward groove (inward recess)
13: outer circumferential surface 14: second notch recess 16: inward reference surface (inward engagement surface)
20: Pin joint 201: Pin joint 21: Outer peripheral surface 22: Outward groove (outward recess)
23: outer circumferential surface 24: first concave portion 26: outward reference surface (outward engagement surface)
30: Load transfer key (inward convex, outward convex)
33: rotation restraining key 40: main body 41: inner circumferential surface 410: inward reference surface 42: inward groove (inward recess)
43: Outer circumferential surface 44: Locking key 45: Through hole (position fixing mechanism)
46: Ball plunger (position fixing mechanism)
47: hollow 48: main body notch concave portion 49: opening 50: main body portion 51: outer peripheral surface 510: outward reference surface 52: outward groove portion (outward concave portion)
53: outer peripheral surface 54: retaining key 55: through hole (position fixing mechanism)
56: Ball plunger (position fixing mechanism)
57: Recess 58: Body notch Recess 59: Opening C: Vibro chuck J: Mechanical joint P: Steel pipe pile S: Steel pipe Y: Yatko Y1: Yatko Y2: Yatko

Claims (8)

A series of steel pipe piles and steel pipe sheet piles developed with different steel pipe diameters and / or steel pipe thicknesses,
At the end of the steel pipe, a mechanical joint of a size corresponding to the diameter and thickness of the steel pipe is provided,
The mechanical joint has a first joint provided to one of the two steel pipes connected to each other, and a second joint provided to the other steel pipe,
An inward convex portion is provided which prevents the first joint and the second joint from being separated in the axial direction of the steel pipe by engaging the outward concave portion provided in the first joint.
An outward reference surface is provided on a part of the outer peripheral surface of the first joint, in which the distance from the axial center of the steel pipe is set to be constant regardless of the diameter and thickness of the steel pipe provided with the first joint. Series of steel pipe piles and steel pipe sheet piles with a group of steel pipes. The first joint is a pin joint, and the second joint is a box joint.
The outward recess is provided on the outer peripheral surface of the pin joint,
The inward convex portion is composed of a load transfer key disposed across the outward concave portion and the inward concave portion provided on the inner circumferential surface of the box joint,
The series of steel pipe piles and steel pipe sheet piles according to claim 1, wherein the outward facing reference surface is provided at a position different from the outward facing recess on the outer peripheral surface of the pin joint. The distance from the axial center of the steel pipe is not limited by the diameter and thickness of the steel pipe provided with the box joint at a position different from the inward recess on the inner peripheral surface of the box joint. Having a group of steel pipe piles provided with an inward fitting surface set equal to the distance from the axis of the steel pipe of the surface,
The inward fitting surface is provided at a tip portion of an inner circumferential surface of the box joint,
The series of steel pipe piles and steel pipe sheet piles according to claim 2, wherein the outward reference surface constitutes an outward fitting surface provided at a position facing the inward fitting surface among the outer peripheral surfaces of the pin joint. . The first joint provided in each of a series of steel pipe piles and steel pipe sheet piles according to any one of claims 1 to 3 respectively provided in a steel pipe group different in at least one of a steel pipe diameter and a steel pipe thickness There,
A body portion capable of enclosing at least a portion of the first joint in which the outward recess is provided;
A retaining member which can be disposed at a bridging position across an inward recess provided at a position facing the outward recess on the inner peripheral surface of the main body and the outward recess provided in the first joint With the key
A position fixing mechanism capable of fixing the retaining key at the straddle position even if the first joint has different outer diameters of the portion where the outwardly facing recess is provided, and
An inward reference surface is provided on an inner circumferential surface of the main body, the inward reference surface being engageable with an outward reference surface provided on a part of an outer circumferential surface of the first joint. A series of steel pipe piles and steel pipe sheet piles developed with different steel pipe diameters and / or steel pipe thicknesses,
At the end of the steel pipe, a mechanical joint of a size corresponding to the diameter and thickness of the steel pipe is provided,
The mechanical joint has a first joint provided to one of the two steel pipes connected to each other, and a second joint provided to the other steel pipe,
An outward convex portion is provided which prevents the first joint and the second joint from being separated in the axial direction of the steel pipe by engaging the inward concave portion provided in the second joint.
An inward reference surface in which the distance from the axial center of the steel pipe is set to be constant regardless of the diameter and thickness of the steel pipe provided with the first joint is a part of the inner peripheral surface of the second joint A series of steel pipe piles and steel pipe sheet piles with a set of steel pipe groups. The first joint is a pin joint, and the second joint is a box joint.
The inward recess is provided on an inner circumferential surface of the box joint,
The outward convex portion includes a load transfer key disposed across the inward recess and the outward recess provided on the outer peripheral surface of the pin joint,
The series of steel pipe piles and steel pipe sheet piles according to claim 5, wherein the inward reference surface is provided at a position different from the inward recess on the inner peripheral surface of the box joint. The distance from the axial center of the steel pipe to the inward reference surface regardless of the diameter and thickness of the steel pipe provided with the pin joint at a position different from the outward recess on the outer peripheral surface of the pin joint Of steel pipe piles provided with an outward fitting surface set equal to the distance from the axis of the steel pipe of
The inward reference surface constitutes an inward fitting surface provided at a tip portion of an inner circumferential surface of the box joint,
The series of steel pipe piles and steel pipe sheet piles according to claim 6, wherein the outward fitting surface is provided at a position facing the inward fitting surface in the outer peripheral surface of the pin joint. A second joint provided in each of a steel pipe group different in at least one of a steel pipe diameter and a steel pipe thickness belonging to the series of steel pipe piles and steel pipe sheet piles according to any one of claims 5 to 7 There,
A body portion which can be enclosed by at least a portion of the second joint in which the inward recess is provided;
A locking key that can be disposed at a straddling position across an outward recess provided at a position facing the inward recess on the outer peripheral surface of the main body and the inward recess provided in the second joint When,
A position fixing mechanism for fixing the retaining key at a straddle position straddling the outward recess and the inward recess even in the second joint in which the inner diameter of the portion where the inward recess is provided is different; As well as,
An outer circumferential surface of the main body portion is provided with an outward reference surface which can be fitted to an inward reference surface provided on a part of an inner circumferential surface of the second joint.

Images