JP2013249729A - Joint structure for pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate field welding and to easily maintain an assembling state of a joint.SOLUTION: At an outer peripheral part of an inner ring 10 which can be externally fitted over a lower-end outer peripheral part of an upper pile 1 and an upper-end outer peripheral part of a lower pile 2, an outer tapered surface 9 which is smaller in diameter toward a lower side is formed and divided into a plurality in a peripheral direction to form division inner rings 10A. A groove 5 along the peripheral direction of a pile and an engagement projection part 8 engaging the groove 5 are formed at an inner peripheral part of the inner ring 10 for the lower-end outer peripheral part of the upper pile 1 and at the inner peripheral part of the inner ring 10 for the upper-end outer peripheral part of the lower pile 2, respectively. An outer ring 12 is provided which has a tapered surface 11, which can be fitted externally to the outer tapered surface 9 of the inner ring 10, formed at an inner peripheral part. Fall stopping means of stopping the outer ring 12 from falling from the inner ring 10 is constituted by providing a fall stopping projection and a lock part to which the fall stopping projection is locked separately to the outer ring and the inner ring respectively so that they are locked at only one position in a pile axis direction of the outer ring to the inner ring.

Description

  The present invention provides an intermediate ring that can be fitted over the lower end outer peripheral portion of the upper pile and the upper end outer peripheral portion of the lower pile in a state where the lower end of the upper pile and the upper end of the lower pile are in contact with each other. An outer tapered surface with a smaller diameter is formed on the outer periphery of the middle ring that is externally fitted to the pile, and a ring is formed by dividing the outer ring into a plurality of parts in the circumferential direction. A groove along the circumferential direction of the pile and its groove The engaging projections that are engaged with the inner ring are formed on the inner peripheral part of the middle ring with respect to the outer peripheral part of the lower end of the upper pile and on the inner peripheral part of the intermediate ring with respect to the outer peripheral part of the upper end of the lower pile. An outer ring having an inner taper surface that can be fitted on the outer taper surface of the middle ring is provided on the inner periphery, and the lower end of the upper pile and the upper end of the lower pile are butted together to form a plurality of divided middle rings at the lower end outer periphery. The upper and lower piles are connected by externally fitting the outer ring to the middle ring in a state where the outer ring is engaged with the outer periphery of the upper end. On the joint structure of the pile.

  Conventionally, in the joint structure of the above pile, the tapered surface formed on each mating surface by externally fitting the outer ring to the middle ring that has been engaged with the upper pile and the lower pile, respectively. The upper pile and the lower pile were firmly connected by the action of (1), for example.

Utility Model Registration No. 2502226

  In the conventional pile joint structure described above, there is a risk that the outer ring may fall off and come off from the middle ring due to vibrations caused by the pile standing work or the weight of the outer ring, and the outer ring is welded at the joint assembly site. It was necessary to fix by.

  Accordingly, an object of the present invention is to eliminate the above-described problems and facilitate the maintenance of the assembled state of the joint without welding on site.

  In the state where the lower end of the upper pile and the upper end of the lower pile are abutted, an intermediate ring that can be fitted over the lower end outer periphery of the upper pile and the upper end outer periphery of the lower pile is provided, and is fitted to the upper pile and the lower pile. An outer tapered surface having a smaller diameter is formed on the outer peripheral portion of the intermediate ring, and a ring is formed by dividing the outer ring into a plurality of portions in the circumferential direction, and engages with the groove and the groove along the circumferential direction of the pile. The engaging projections are formed separately on the inner peripheral part of the middle ring with respect to the outer peripheral part of the lower end of the upper pile and on the inner peripheral part of the intermediate ring with respect to the outer peripheral part of the upper end of the lower pile. An outer ring having an inner taper surface that can be fitted on the outer taper surface of the inner pile is provided, and the lower end of the upper pile and the upper end of the lower pile are brought into contact with each other. The joint of the pile which connects an upper pile and a lower pile by fitting an outer ring to a middle ring in the state engaged over A granulation, may be each other provided retaining means performs retaining the outer ring with respect to the middle ring.

According to the configuration, in order to connect the upper pile and the lower pile, the lower end of the upper pile and the upper end of the lower pile are brought into contact with each other, and the middle ring composed of a plurality of divided rings is connected to the lower end outer peripheral portion of the upper pile and the lower pile. It is made to fit over the outer periphery of the upper end of the pile. At that time, the engagement convex portion formed on the other of the middle ring and the outer periphery of the lower end is engaged with the engagement convex portion formed on the other, and the groove formed on one of the outer periphery of the intermediate ring and the upper end is engaged with the other. By engaging the formed engaging projections, the upper pile and the lower pile are engaged and connected via the middle ring. Then, by fitting the outer ring to the middle ring, the inner tapered surface of the outer ring is pressed against the outer tapered surface of the middle ring, and the middle ring is tightened by the outer ring to connect the upper pile and the lower pile. Is certain.
Furthermore, since the outer ring is prevented from coming off from the middle ring by the retaining means, it is possible to prevent the outer ring from dropping from the middle ring.
Therefore, the connection between the upper pile and the lower pile is not only possible by mechanical connection without using welding in the field, but also the state can be easily maintained.

  Further, in order to constitute the retaining means, the retaining protrusion and the locking portion that is retained by the retaining protrusion are distributed and provided on a part of each of the outer ring and the middle ring in the pile axial direction. There may be.

According to this configuration, when the outer ring is fitted on the middle ring, the retaining ring formed on one of the two rings is locked to the locking portion formed on the other, so that the outer ring falls off from the middle ring. Can be prevented.
Therefore, the connection state of the pile can be maintained with a simple structure and a simple operation of only fitting the outer ring to the middle ring.

  Further, in order to constitute the retaining means, an insertion tool that penetrates in a radial direction with respect to the outer ring may be provided, and a locking portion for locking the insertion tool may be provided in the middle ring.

  According to the configuration, when the outer ring is externally fitted to the middle ring, the fitting can be fitted until it penetrates the outer ring while being smoothly fitted without being caught, and locked to the locking portion of the middle ring. By doing so, the outer ring is securely held with respect to the middle ring without coming off.

  Moreover, you may provide the restraint means which prevents overtightening between both accompanying the mutual fitting of an intermediate | middle ring and an outer ring.

  According to this configuration, it is possible to prevent the risk of the outer ring from being damaged due to overloading of the outer ring due to excessive tightening between the two due to excessive fitting of the outer ring to the middle ring.

  In addition, a guide guide portion that guides a mutual fitting operation of the outer ring and the middle ring may be formed on the inner periphery of the upper end of the outer ring or the outer periphery of the lower end of the middle ring.

  According to this configuration, the operation of fitting the outer ring and the middle ring is performed more smoothly by the guide guide portion.

  The first characteristic configuration of the present invention is a state in which the lower ring of the upper pile and the upper edge of the lower pile are in contact with each other, and an intermediate ring that can be externally fitted across the lower edge outer periphery of the upper pile and the upper edge outer periphery of the lower pile. The outer ring surface of the middle ring that is externally fitted to the upper pile and the lower pile is formed with an outer tapered surface having a smaller diameter toward the lower side, and is divided into a plurality of pieces in the circumferential direction to form a divided middle ring, and the circumferential direction of the pile A groove extending along the groove and an engaging convex portion engaging with the groove, the inner peripheral portion of the middle ring with respect to the outer peripheral portion of the lower end of the upper pile, and the outer peripheral portion of the middle ring with respect to the outer peripheral portion of the upper end of the lower pile. The inner ring is provided with an outer ring that is formed on the inner ring and is formed with an inner tapered surface that can be fitted on the outer tapered surface of the middle ring. The lower end of the upper pile and the upper end of the lower pile are butted together. The plurality of middle rings are engaged with the outer periphery of the lower end and the outer periphery of the upper end. In the joint structure of the pile that connects the upper pile and the lower pile by external fitting, provided with a retaining means for retaining the outer ring with respect to the middle ring, to constitute the retaining means, The outer ring and the middle ring are locked at a single position in the pile axial direction of the outer ring with respect to the middle ring. There is a place where each is distributed.

  According to a second characteristic configuration of the present invention, the lower end outer peripheral portion of the upper pile and the upper end outer peripheral portion of the lower pile include an inner ring fixed to an end portion of the upper pile and an end portion of the lower pile. A groove is formed in the outer circumferential surface of the ring in the circumferential direction, and an engaging portion that engages with the groove of the inner ring is formed on the inner circumferential surface of the middle ring.

  The third characteristic configuration of the present invention is that the outer ring and the middle ring are engaged with each other at a fitting position where the connection strength of the upper pile and the lower pile with mutual fitting becomes a predetermined value. The retaining protrusion is set so as to be engaged with the portion.

According to the third characteristic configuration of the present invention, the outer ring and the middle ring are fitted to each other at a fitting position where the connection strength of the upper pile and the lower pile with mutual fitting becomes a predetermined value. By setting the retaining projection to be latched with the latching portion, the outer ring and the middle ring are connected so that the latching portion and the retaining projection are simply latched together. By simply performing the fitting operation, it is ensured that the connection strength between the upper pile and the lower pile by both rings becomes a predetermined value.
Therefore, it is possible to prevent the outer ring from coming off from the middle ring while stably securing the middle ring tightening force by the outer ring.

  According to a fourth characteristic configuration of the present invention, the engaging portion is formed by a concave portion and is provided on one of the outer ring and the middle ring, and the retaining protrusion is provided on the inner side of the outer ring and the middle ring. It is in the other.

  According to the fourth characteristic configuration of the present invention, when the outer ring is fitted into the middle ring, the retaining protrusion provided on one of the outer ring and the middle ring is engaged with the recess provided on the other. By doing so, it is possible to prevent the outer ring from being detached from the middle ring, and it is possible to confirm a predetermined tightening strength by simple processing.

  According to a fifth feature of the present invention, the locking portion is formed on the rear end surface of one of the outer ring and the middle ring in the fitting direction, and the retaining protrusion is formed on the other of the outer ring and the middle ring. It is that it is provided.

  According to the fifth characteristic configuration of the present invention, the locking portion to be locked by the retaining projection is formed on the rear end surface of one of the outer ring and the middle ring in the fitting direction without forming the recess. By doing so, processing effort can be reduced compared with a recessed part.

Exploded perspective view described in the embodiment Main part longitudinal cross-sectional view of embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Exploded perspective view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment Main part longitudinal cross-sectional view of another embodiment

  Embodiments of the present invention will be described below with reference to the drawings.

[First embodiment]
As shown in FIGS. 1 and 2, when connecting the upper pile 1 and the lower pile 2 made of steel pipes, a first groove 3 is provided along the circumferential direction on the outer periphery of the lower end of the upper pile 1, and the lower pile 2 A second groove 4 extending in the circumferential direction is provided on the outer peripheral portion of the upper end of the first engaging convex portion 6 engaging with the first groove 3 and a second engaging convex portion 7 engaging with the second groove 4. A steel middle ring 10 formed on the inner peripheral part and having an outer tapered surface 9 having a smaller diameter on the outer peripheral part toward the second engagement convex part 7 side is divided into a plurality of parts in the circumferential direction and divided into rings 10A. A series of outer rings 12 formed with an inner tapered surface 11 that can be fitted to the outer tapered surface 9 of the middle ring 10 on the inner peripheral portion are made of steel, and the lower end of the upper pile 1 and the upper end of the lower pile 2 The outer ring 12 is externally fitted to the middle ring 10 in a state in which the plurality of split middle rings 10A are engaged across the lower end outer peripheral portion and the upper end outer peripheral portion. In, you have configured joint structure of piles for connecting the upper pile 1 and Shitakui 2.

The upper pile 1 is composed of a steel pile main body portion 13 and a steel first inner ring portion 14 integrated in advance with a lower end portion of the pile main body portion 13 by welding, and the first inner ring thereof. Two first grooves 3 are formed in the part 14 around the entire circumference.
Similarly to the upper pile 1, the lower pile 2 includes a steel pile main body portion 13 and a steel second inner ring portion 15 integrated in advance with the upper end portion of the pile main body portion 13 by welding. The second inner ring portion 15 has two second grooves 4 formed on the entire circumference.

As shown in FIGS. 1 and 2, the first inner ring portion 14 and the second inner ring portion 15 are each provided with a groove for welding to the pile main body portion 13 at one end surface portion, and the other end surface portions thereof. Are formed with anti-rotation holes 21 having the same diameter (13φ) for inserting the anti-rotation pins 20 at regular intervals in the circumferential direction, and the anti-rotation pins 20 are provided with anti-rotation holes on one side in the longitudinal direction. 21 is formed in a large-diameter portion 20A having the same diameter (13φ) as 21 and the other side is formed in a small-diameter portion 20B having a diameter (12 mm) smaller by 1 mm.
And, when the upper pile 1 and the lower pile 2 are abutted, the large-diameter portion 20A of the detent pin 20 is inserted into the detent hole 21 on the other end surface portion in advance, and it is difficult to remove. The upper pile 1 and the lower pile 2 are aligned by fitting the small-diameter portion 20B of the detent pin 20 into the detent hole 21 on the other end surface portion.
Thereby, the upper pile 1 and the lower pile 2 do not rotate around the axial center relatively, and do the standing work while driving and rotating the upper pile 1 and the lower pile 2 integrally around the axial center. It becomes effective sometimes.

The first groove 3 and the second groove 4 are formed in the inner peripheral portion of the middle ring 10, and the first engagement convex portion 6 and the second engagement convex portion 7 are formed in the first inner ring portion 14. The first groove 3 and the second groove 4 may be collectively referred to as the groove 5, and the first engagement convex portion 6 and the second engagement convex portion 7 may be provided. Are collectively referred to as an engaging convex portion 8.
Further, the groove 5 and the engaging convex portion 8 are provided side by side on the middle ring 10, and the corresponding engaging convex portion 8 and the groove 5 are distributed to the first inner ring portion 14 and the second inner ring portion 15. It may be provided.

  Hereinafter, the rear end in the fitting direction of the middle ring 10 refers to the upper end and the tip refers to the lower end, the rear end in the fitting direction of the outer ring 12 refers to the lower end, and the tip refers to the upper end.

  In order to prevent the outer ring 12 from slipping off from the middle ring 10, a trapezoidal retaining protrusion 16 having a longitudinal cross section is provided on the outer periphery of the middle ring 10 on the rear end side in the fitting direction with respect to the outer ring 12 over the entire circumference. A locking portion 17 that is provided continuously and locked by the retaining projection 16 is formed as a concave portion, and is formed on the inner peripheral portion of the outer ring 12 on the front end side in the fitting direction with respect to the middle ring 10 over the entire circumference. It is provided.

  When the retaining protrusion 16 and the locking portion 17 are locked, the connection strength between the upper pile and the lower pile becomes a set value. Here, the connection strength is a joint strength of a pile that is held when a bending load is applied by pulling the connected upper and lower piles.

  A guide guide portion 18 that is steeper than the inner taper surface 11 is provided on the inner circumferential portion of the outer ring 12 at the front end in the fitting direction with respect to the concave portion, and the outer ring 12 is fitted to the middle ring 10. Accordingly, the two rings 10 and 12 can be smoothly fitted to each other without being caught, and at the same time, particularly in the case of FIGS. 2 and 3, there is an effect that the retaining protrusion 16 is easily engaged with the recess. .

[Second Embodiment]
As shown in FIG. 3, in addition to the structure of the first embodiment, the outer ring 12 is provided with a stopper portion 19 as a restraining means for preventing the outer ring 12 from being excessively fitted into the middle ring 10 and a rear end portion in the fitting direction. Are provided in a state of projecting inward. This prevents the outer ring 12 from being overloaded by excessively tightening the middle ring 10 due to excessive fitting of the outer ring 12.

  In addition, when the connection strength of the upper pile and the lower pile when the lower end of the middle ring 10 abuts against the stopper portion 19 becomes the design value, the upper pile and the lower pile are provided by the presence of the stopper portion 19. It can be confirmed that the connection strength of the steel was as designed.

[Third embodiment]
As shown in FIG. 4, the locking portion 17 is formed as a recess in which the retaining protrusion 16 can be engaged, and is provided at the distal end side in the fitting direction with respect to the outer ring 12 at the outer peripheral portion of the middle ring 10. 16 is provided on the inner peripheral portion of the outer ring 12 on the rear end side in the fitting direction with respect to the middle ring 10, and the outer peripheral portion of the middle ring 10 is steeper than the outer tapered surface 9 on the tip side in the fitting direction than the concave portion. A guide portion 18 is provided, and a stopper portion 19 that prevents the outer ring 12 from being excessively fitted into the middle ring 10 is provided at the rear end in the fitting direction of the middle ring 10 so as to protrude toward the outer diameter side.

  In addition, when the connection strength between the upper pile and the lower pile when the stopper portion 19 and the upper end of the outer ring 12 are brought into contact with each other is a design value, there is a stopper portion. It can be confirmed that the connection strength is as designed.

[Fourth embodiment]
The locking portion 17 is formed on the rear end surface of one of the outer ring 12 and the middle ring 10 in the fitting direction, and the retaining protrusion 16 is formed in the other fitting direction of the outer ring 12 or the middle ring 10. As shown in FIG. 5, in this case, the upper end surface of the middle ring 10 is formed in the locking portion 17, and the retaining protrusion 16 that locks to the locking portion 17 is provided. Formed on the upper end side of the outer ring 12, a projection guide guide is formed on the peripheral portion on the upper end side of the middle ring 10.
The stopper portion 19 is arranged at the lower end portion of the outer ring 12.

[Fifth Embodiment]
As a retaining means for retaining the outer ring 12 with respect to the middle ring 10, in place of the combination of the retaining protrusion 16 and the locking portion 17 described above, in another embodiment shown in FIGS. A female screw hole 25 penetrating at four locations on the circumference of the ring 12 is provided, a bolt 26 that can be screwed into the female screw hole 25 is provided, and a locking portion for locking the bolt 26 is formed at the upper end of the middle ring 10. is there.
In other words, when the outer ring 12 is externally fitted to the middle ring 10, they can be smoothly fitted to each other without being caught between them, and after the fitting, the bolt 26 is connected to the internal thread of the outer ring 12. The holes 25 are screwed in until they are inserted, and the front ends of the bolts 26 are engaged with the upper ends of the middle ring 10, thereby reliably preventing the outer ring 12 from coming off. In the figure, 27 is a backing ring at the time of welding.
In addition, the latching | locking part of the middle ring 10 which the bolt 26 latches is not restricted to the upper end surface of the middle ring 10 shown in FIG. 17, but as shown in FIG. 19, the bolt 26 provided in the outer peripheral part of the middle ring 10 is shown. A locking recess 28 that can be recessed may be used.

[Another embodiment]
Other embodiments will be described below.
<1> The retaining protrusion 16 may be provided in a warped shape that is discontinuous in the circumferential direction in addition to being provided over the entire circumference.
<2> The retaining protrusion 16 may have a semicircular longitudinal cross-sectional shape other than the trapezoidal shape, and may have a surface inclined more gently than the rear end side as shown in FIG. In this case, it is easy to put the retaining projection 16 into the recess, and it also has a function as a stopper portion 19 for preventing the fitting.
<3> The pile main body 13 may be made of concrete instead of steel.
<4> The engaging portion between the locking portion 17 and the retaining protrusion 16 may be at an intermediate position in the pile axis direction between the outer ring 12 and the middle ring 10.
<5> As shown in FIGS. 6 to 16, the locking portion 17 and the retaining protrusion 16 are not only a combination of the retaining portion 17 and the retaining protrusion 16 formed of a recess, but also from the rear end surface in the fitting direction. The combination of the locking portion 17 and the retaining projection 16 may be provided separately on the outer ring 12 and the middle ring 10.
<6> Further, as shown in FIGS. 3, 4, 5, 15, and 16, the stopper portion 19 may be provided at the rear end portion of the outer ring 12 and the rear end portion of the middle ring 10.
<7> Either one of the stopper portion 19 and the tapered guide guide portion 18 may be provided, or both may be provided.
<8> In place of the bolts 26, as the retaining means, retaining pins 29 and 30 that pass through through holes 28 formed in the outer ring 12 are provided as shown in FIGS. A locking portion for locking the pin 29 may be formed on the upper end portion of the middle ring 10, and the retaining pin 29 of FIG. 20 forms a locking projection 31 at the tip, and the locking projection 31. 21 is formed in the middle ring 10, and the retaining pin 30 in FIG. 21 is formed with a slit 33 at the distal end, and the distal end of the retaining pin 30 is formed in the middle ring 10. A recess 34 that can be inserted is formed, and a projection 35 that opens the slit 33 as the retaining pin 30 is fitted into the recess 34 is provided in the recess 34 so that the retaining pin 30 does not come off. It is. Therefore, the bolt 26 and the retaining pins 29 and 30 are collectively referred to as insertion tools.

  In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Upper pile 2 Lower pile 5 Groove 8 Engaging convex part 9 Outer taper surface 10 Middle ring 10A Split ring 11 Inner taper surface 12 Outer ring 16 Retaining protrusion 17 Locking part 18 Guide guide part 19 Stopper part

Claims (5)

  In the state where the lower end of the upper pile and the upper end of the lower pile are abutted, an intermediate ring that can be fitted over the lower end outer periphery of the upper pile and the upper end outer periphery of the lower pile is provided, and is fitted to the upper pile and the lower pile. An outer tapered surface having a smaller diameter is formed on the outer peripheral portion of the middle ring, and a ring is formed by dividing the outer ring into a plurality of portions in the circumferential direction, and engages with the groove along the circumferential direction of the pile and the groove. Engaging projections to be distributed on the inner periphery of the middle ring with respect to the outer periphery of the lower end of the upper pile and the inner periphery of the middle ring with respect to the outer periphery of the upper end of the lower pile, respectively. An outer ring having an inner taper surface that can be fitted over the outer taper surface of the middle ring is provided on the inner periphery, and the lower end of the upper pile and the upper end of the lower pile are abutted to form a plurality of divided middle rings at the lower end outer periphery. And the upper ring by fitting the outer ring to the middle ring in a state of being engaged over the outer periphery of the upper end, A pile joint structure for connecting a pile with a retaining means for retaining the outer ring with respect to the middle ring, and the retaining protrusion includes the retaining protrusion and the retaining protrusion. The joint structure of the pile provided separately to the outer ring and the middle ring so that the locking portion to be stopped is locked at a single position in the pile axial direction with respect to the middle ring of the outer ring. .   The lower end outer peripheral portion of the upper pile and the upper end outer peripheral portion of the lower pile are composed of an inner ring fixed to the end portion of the upper pile and the end portion of the lower pile, and grooves are formed in the outer peripheral surface of the inner ring in the circumferential direction. The pile joint structure according to claim 1, wherein an engagement portion that is formed and engages with a groove of the inner ring is formed on an inner peripheral surface of the middle ring.   The retaining protrusion is locked to the locking portion at a fitting position where the outer ring and the middle ring are fitted to each other so that the connection strength of the upper pile and the lower pile at a predetermined value is obtained by mutual fitting. The pile joint structure according to claim 2, which is set as described above.   4. The locking portion is formed as a recess and is provided on one of the outer ring and the middle ring, and the retaining protrusion is provided on the other of the outer ring and the middle ring. Pile joint structure described.   The locking portion is formed on a rear end surface of one of the outer ring and the middle ring in the fitting direction, and the retaining protrusion is provided on the other of the outer ring and the middle ring. Item 4. A pile joint structure according to Item 3.

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