JP6079392B2 - Pile joint structure - Google Patents

Description

  The present invention relates to a pile joint structure for connecting a plurality of steel pipe piles with a mechanical joint in the field of civil engineering and construction.

  Conventionally, steel pipe piles are driven into the ground to a predetermined depth as pile foundations, etc., in the space above the ground where the steel pipe piles are driven, in places where there are height restrictions due to other structures, etc. It is necessary to drive a plurality of steel pipe piles divided into short lengths sequentially into the ground, and to connect the plurality of steel pipe piles in the pipe axis direction.

  At this time, since the plurality of steel pipe piles must be joined to each other at the ends in the pipe axis direction of the steel pipe pile, a method of joining the ends of the plurality of steel pipe piles by welding, A method is used in which a mechanical joint is provided in the part and joined. As a mechanical joint provided at the end of a steel pipe pile, for example, a joint structure of a pile as disclosed in Patent Document 1 has been proposed.

  The joint structure of a pile disclosed in Patent Document 1 includes an inner joint pipe provided in an upper pile of a steel pipe pile and an outer joint pipe provided in a lower pile of the steel pipe pile and fitted to the inner joint pipe. By joining the locking flange of the outer joint pipe into the fitting recess of the inner joint pipe and stopping it, a plurality of steel pipe piles are joined using a mechanical joint provided at the end of the steel pipe pile. To do.

JP 2006-188889 A

  However, the method of joining the ends of a plurality of steel pipe piles by welding is that if the steel pipe piles are driven into the ground outdoors etc., welding will occur at the weld location if welding is performed in rainy weather or strong winds. There is a fear. For this reason, the method of joining the ends of multiple steel pipe piles by welding requires that the welding operation be interrupted during stormy weather such as rain and strong winds, so it is necessary to drive multiple steel pipe piles into the ground in a short construction period When there is, it becomes difficult to use the method of joining by welding.

  Since the joint structure of the pile disclosed in Patent Document 1 does not require joining the ends of a plurality of steel pipe piles by welding, it is provided by providing a mechanical joint at the end of the steel pipe pile and joining them. A plurality of steel pipe piles are joined in a shorter construction period than joining by welding. However, the joint structure of the pile disclosed in Patent Document 1 is to elastically deform the locking collar portion of the outer joint pipe and to stop by fitting into the fitting recess of the inner joint pipe. Once the joint pipes are fitted, there is a problem that they cannot be separated later.

  Therefore, the joint structure of the pile disclosed in Patent Document 1 cannot separate the inner joint pipe and the outer joint pipe later, and releases the connected state of a plurality of steel pipe piles that have been connected once. This is not only difficult to use as a pile foundation for temporary use, but it is necessary to temporarily remove the steel pipe piles on the ground before the time limit is reached. When there is a problem, or when the number of steel pipe piles driven into the ground changes due to the influence of the ground strength or the like, there is a problem that it is difficult to flexibly cope with these situations.

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is to easily connect a plurality of steel pipe piles with mechanical joints, and to connect the plurality of steel pipes. An object of the present invention is to provide a joint structure for a pile that can be easily released after the piles are connected.

The pile joint structure according to the first aspect of the present invention is a pile joint structure for connecting a plurality of steel pipe piles, a male joint provided at an end of the first pile, and facing the male joint, A female joint provided at the end of the two piles, the male joint having a fitting protrusion formed in a spiral shape on the outer peripheral surface of the male joint, and extending in the pipe axis direction of the steel pipe pile A slit is formed, and the female joint has a fitting groove formed in a spiral shape on the inner peripheral surface of the female joint, and the male joint is pushed into the female joint and inserted, whereby the fitting is performed. The fitting protrusion is fitted in the fitting groove, and the fitting groove is formed along the fitting protrusion formed in a spiral shape by relatively rotating the first pile and the second pile. And the fitting is released .

  In the joint structure of the pile according to the second invention, in the first invention, the fitting protrusions are continuously increased in height from the protrusion base point of each of the fitting protrusions toward the protrusion vertex. It is formed by protruding from the outer peripheral surface of the male joint.

  The joint structure of the pile according to the third invention is the pipe shaft of the steel pipe pile according to the first invention or the second invention, wherein the fitting protrusion has a protruding low point from the protruding vertex of each fitting protrusion. The fitting groove portion is formed so as to protrude from the outer peripheral surface of the male joint so that the fitting groove portion is closer to the groove portion shallow point than the groove portion deep point of each fitting groove portion. Is formed in a groove shape on the inner peripheral surface of the female joint so as to be disposed on the distal end side of the female joint in the pipe axis direction of the steel pipe pile.

  The joint structure of a pile according to a fourth invention is any one of the first to third inventions, wherein the male joint is from the distal end side of the male joint to the proximal end side of the male joint in the tube axis direction of the steel pipe pile. The outer diameter of the female joint is gradually increased toward the proximal end side of the female joint from the distal end side of the female joint in the pipe axial direction of the steel pipe pile. It is formed so that it may become.

  The joint structure of a pile according to a fifth aspect of the present invention is the joint structure according to any one of the first to fourth aspects, wherein the fitting protrusion is the leading end side of the male joint in the tube axis direction of the steel pipe pile. The outer diameter of the protruding vertex of the steel pipe pile is equal to or smaller than the inner diameter of the groove-shaped shallow point of the fitting groove part into which the fitting protrusion part which is the base end side of the male joint is fitted in the pipe axis direction of the steel pipe pile. The male joint is formed so as to protrude from the outer peripheral surface.

  The pile joint structure according to a sixth aspect of the present invention is the pile joint structure according to any one of the first to fifth aspects, wherein the male joint is inserted into the female joint, and the fitting protrusion is inserted into the fitting groove. Are inserted into the outer periphery of the female joint so that the male joint is pushed and deformed by the rod-shaped member toward the inner side of the pipe axis perpendicular direction of the steel pipe pile. It is formed.

  According to 1st invention-6th invention, by rotating a 2nd pile with respect to a 1st pile, a fitting groove part is moved along the fitting protrusion formed helically, and further, By pulling up the two piles upward in the pipe axis direction, it becomes possible to easily release the connected state between the first pile and the second pile.

  Moreover, according to 1st invention-6th invention, even if it is a case where construction cannot be completed within the limited work time, the connection state of the 1st pile and the 2nd pile which were once connected is made. It can be easily released, and it becomes possible to respond flexibly to changes in the process according to the situation at the construction site.

  Furthermore, according to 1st invention-6th invention, in the temporary steel pipe pile, even if it is a case where the joint structure of this pile is used, by canceling | releasing the connection state of a 1st pile and a 2nd pile easily The removal of the temporary steel pipe pile can be facilitated.

  In particular, according to the second invention, since the protruding side surface portion of the fitting protrusion is formed in a taper shape, the fitting protrusion and the female protrusion are brought into contact with each other and the male joint is easily pushed into the female joint. It becomes possible.

  In particular, according to the third invention, the protruding bottom surface portion of the fitting protrusion is formed in a hook shape, the groove-shaped bottom surface portion of the fitting groove portion is formed in a hook shape, and the fitting protrusion is a fitting groove portion. By being engaged so as to mesh with each other, it becomes possible to increase the resistance force against the tensile force in the pipe axis direction between the first pile and the second pile.

  In particular, according to the fourth and fifth aspects of the invention, the outer diameter of the protrusion vertex of the fitting projection that is the distal end side of the male joint in the pipe axis direction of the steel pipe pile is the base of the male joint in the pipe axis direction of the steel pipe pile. Since the fitting protrusion is formed so as to be equal to or less than the inner diameter of the groove-shaped shallow spot of the fitting groove where the fitting protrusion on the end side is fitted, when the male joint is inserted into the female joint, It is possible to minimize wear due to the contact between the fitting protrusion and the female protrusion.

  Further, according to the fourth and fifth inventions, the outer diameter of the protruding vertex of the fitting projection that is the distal end side of the male joint in the pipe axis direction of the steel pipe pile is the base of the male joint in the pipe axis direction of the steel pipe pile. Since the fitting projection is formed so that the fitting projection on the end side is not more than the inner diameter of the groove-shaped shallow spot of the fitting groove to be fitted, each fitting projection and the female projection It is possible to reduce the number of times of contact and connect the first pile and the second pile easily and quickly.

  Further, according to the fourth and fifth inventions, the outer diameter of the protrusion vertex of the fitting projection that is the distal end side of the male joint in the pipe axis direction of the steel pipe pile is the base of the male joint in the pipe axis direction of the steel pipe pile. Since the fitting protrusion is formed so as to be equal to or less than the inner diameter of the groove-shaped shallow spot of the fitting groove where the fitting protrusion on the end side is fitted, the second pile is rotated once with respect to the first pile. It is possible to easily and quickly release the connected state between the first pile and the second pile only by making them.

  In particular, according to the sixth invention, when the fitting groove is moved along the fitting protrusion formed in a spiral shape, even when sand or the like is sandwiched by the fitting groove and the movement is inhibited. The male joint can be deformed to remove sand and the like, and the second pile can be smoothly rotated with respect to the first pile.

It is a front view showing a mode in which a plurality of steel pipe piles are driven into the ground beside a railroad or the like using a joint structure of piles to which the present invention is applied. It is a perspective view which shows the male joint and female joint in 1st Embodiment of the joint structure of the pile to which this invention is applied. (A) is a side view which shows the male joint in 1st Embodiment of the joint structure of the pile to which this invention is applied, (b) is the top view. It is an expanded side view which shows the fitting protrusion of the male joint in 1st Embodiment of the joint structure of the pile to which this invention is applied. (A) is the partially broken side view which shows the female joint in 1st Embodiment of the joint structure of the pile to which this invention is applied, (b) is the bottom view. It is an expanded side view which shows the fitting groove part of the female joint in 1st Embodiment of the joint structure of the pile to which this invention is applied. It is a partially broken side view which shows the aspect which a male joint deform | transforms in 1st Embodiment of the joint structure of the pile to which this invention is applied. It is a partially broken side view which shows the aspect which the 1st protrusion part of the male joint fitted in the 1st groove part of the female joint in 1st Embodiment of the joint structure of the pile to which this invention is applied. In the first embodiment of the pile joint structure to which the present invention is applied, the first protrusion of the male joint is fitted into the second groove of the female joint, and the second protrusion of the male joint is fitted into the first groove of the female joint. It is a partially broken side view showing the combined mode. It is a partially broken side view which shows the aspect which the fitting protrusion of the male joint fitted in the fitting groove part of the female joint in 1st Embodiment of the joint structure of the pile to which this invention is applied. It is an expanded side view which shows the aspect which the fitting protrusion of the male joint fitted in the fitting groove part of the female joint in 1st Embodiment of the joint structure of the pile to which this invention is applied. It is a perspective view which shows the aspect by which the connection state of a 1st pile and a 2nd pile is cancelled | released in 1st Embodiment of the joint structure of the pile to which this invention is applied. It is an expanded side view which shows the aspect which the male joint of the joint structure of the pile to which this invention is applied is pushed in with a rod-shaped member, and deform | transforms. It is a side view which shows the male joint and female joint in 2nd Embodiment of the joint structure of the pile to which this invention is applied. It is an enlarged side view which shows the fitting protrusion part of the male joint and the fitting groove part of a female joint in 2nd Embodiment of the joint structure of the pile to which this invention is applied. It is a partially broken side view which shows the aspect which a male joint deform | transforms in 2nd Embodiment of the joint structure of the pile to which this invention is applied. It is an expanded side view which shows the aspect which the fitting protrusion of the male joint fitted in the fitting groove part of the female joint in 2nd Embodiment of the joint structure of the pile to which this invention is applied. It is a perspective view which shows the aspect by which the connection state of a 1st pile and a 2nd pile is cancelled | released in 2nd Embodiment of the joint structure of the pile to which this invention is applied.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the joint structure 1 of the pile to which this invention is applied is demonstrated in detail, referring drawings.

  A pile joint structure 1 to which the present invention is applied is used, for example, when a plurality of steel pipe piles 10 divided into a short length are driven into a ground 8 beside a railroad or the like as shown in FIG.

  The pile joint structure 1 to which the present invention is applied has a plurality of steel pipe piles 10 driven into the ground 8 when the working range is limited as shown in the region A in the space above the ground 8. In this way, they are sequentially connected to a predetermined depth.

  As shown in FIG. 2, the pile joint structure 1 to which the present invention is applied is opposed to the male joint 3 at the male joint 3 provided at the upper end portion 11 a of the first pile 11 and the lower end portion 12 a of the second pile 12. And a female joint 4 provided. The pile joint structure 1 to which the present invention is applied connects the first pile 11 and the second pile 12 in the pipe axis direction X by inserting the male joint 3 into the female joint 4.

  The pile joint structure 1 to which the present invention is applied is the outer diameter of the outer peripheral surface 3c of the distal end 3a of the male joint 3 from the distal end 3a side to the proximal end 3b side of the male joint 3 in the tube axis direction X in the first embodiment. And the outer diameter of the outer peripheral surface 3c of the base end 3b of the male joint 3 and the female joint 4 in the tube axis direction X from the distal end 4a side to the base end 4b side. 4, the inner diameter of the inner peripheral surface 4c of the distal end 4a of the female joint 4 and the inner diameter of the inner peripheral surface 4c of the base end 4b of the female joint 4 are formed to be substantially the same.

  As shown in FIG. 3, the male joint 3 has a fitting protrusion 5 formed on the outer peripheral surface 3 c of the male joint 3 so as to protrude in the tube axis orthogonal direction Y. The male joint 3 has a plurality of slits 31 formed by cutting out the male joint 3 so as to extend in the tube axis direction X. The male joint 3 is formed with a key hole 10 a that is penetrated in the pipe axis orthogonal direction Y at the tip 3 a of the male joint 3.

  The slits 31 are continuously formed in a substantially straight line from the base end 3 b of the male joint 3 to the tip 3 a of the male joint 3, and a plurality of slits 31 are formed at a predetermined interval in the circumferential direction Z of the steel pipe pile 10. The slit 31 is not limited to this, and may be formed in any manner, and may not be formed up to the base end 3 b of the male joint 3.

  As shown in FIG. 3A, the fitting protrusion 5 is formed in a predetermined range in the tube axis direction X between the distal end 3a and the proximal end 3b of the male joint 3, and in FIG. As shown, it is formed in a spiral shape rotating in the circumferential direction Z. The fitting protrusion 5 is intermittently formed in the circumferential direction Z by forming a plurality of slits 31 in the male joint 3.

  As shown in FIG. 3 (a), the fitting protrusion 5 is rotated 3 times in the tube axis direction X by causing the fitting protrusion 5 to rotate three times spirally and projecting from the outer peripheral surface 3 c of the male joint 3. A first protrusion 51, a second protrusion 52, and a third protrusion 53 are formed across the steps. The fitting protrusion 5 is not limited to this, and may be formed by being rotated in a spiral shape with any quantity, and may be formed over any number of stages in the tube axis direction X.

  As shown in FIG. 4, the fitting protrusion 5 includes a protrusion vertex 5 a that protrudes most outward in the tube axis orthogonal direction Y, and an upper portion of the fitting protrusion 5 in the tube axis direction X. The outer periphery of the male joint 3 in which the fitting protrusion 5 is not formed at the protruding base point 5b that becomes the boundary with the outer peripheral surface 3c of the male joint 3 that is not formed and the lower part of the fitting protrusion 5 in the tube axis direction X And a projecting low point 5c serving as a boundary with the surface 3c.

  The fitting protrusion 5 is arranged such that the protruding vertex 5a is arranged on the outer side of the tube axis orthogonal direction Y from the protruding base 5b, and the height of the protruding side surface 5d is set from the protruding base 5b toward the protruding vertex 5a. It is formed so as to protrude from the outer peripheral surface 3c of the male joint 3 in a tapered manner so as to be continuously increased in the direction perpendicular to the axis Y.

  The fitting protrusion 5 is arranged such that the protruding low point 5c is closer to the distal end 3a side of the male joint 3 in the tube axis direction X than the protruding vertex 5a, and protrudes from the protruding vertex 5a toward the protruding low point 5c. It is formed by protruding from the outer peripheral surface 3c of the male joint 3 in a hook shape so that the portion 5e is inclined toward the tip 3a side of the male joint 3.

  As shown in FIG. 5, the female joint 4 has a fitting groove portion 6 that is recessed in the pipe shaft orthogonal direction Y and is formed in a groove shape on the inner peripheral surface 4 c of the female joint 4. The female joint 4 is formed with a key hole 10a penetrating in the tube axis orthogonal direction Y at the proximal end 4b of the female joint 4, and between the distal end 4a and the proximal end 4b of the female joint 4 A plurality of through holes 41 penetrating Y are formed.

  As shown in FIG. 5A, the fitting groove 6 is formed in a predetermined range in the tube axis direction X between the distal end 4a and the proximal end 4b of the female joint 4, and is shown in FIG. 5B. Thus, it is formed in a spiral shape rotating in the circumferential direction Z. The fitting groove portion 6 is formed continuously with the fitting groove portion 6 below to form the female projection portion 7.

  As shown in FIG. 5A, the fitting groove 6 is formed in a groove shape on the inner peripheral surface 4 c of the female joint 4 by rotating the fitting groove 6 three times in a spiral manner, and thereby in the tube axis direction. A first groove 61, a second groove 62, and a third groove 63 are formed over three stages at X, and a first female protrusion 71, a second female protrusion 72, and a third female protrusion 73 are formed. Is done. The fitting groove portion 6 is not limited to this, and may be formed by being rotated in a spiral shape with any number, and may be formed over any number of stages in the tube axis direction X.

  As shown in FIG. 6, the fitting groove portion 6 has a groove-like deep point 6 a that is the deepest position in the tube axis orthogonal direction Y, and a lower portion of the fitting groove portion 6 in the tube axis direction X. And a grooved shallow spot 6b serving as a boundary. The fitting groove 6 is arranged such that the grooved shallow point 6b is closer to the proximal end 4b side of the female joint 4 in the tube axis direction X than the grooved deep point 6a, and the grooved deep point 6a is changed to the grooved shallow point 6b. The groove-shaped bottom surface portion 6c is inclined toward the base end 4b side of the female joint 4 and is formed in a hook shape.

  The female projecting portion 7 includes a female projecting base point 7a below the female projecting portion 7 in the tube axis direction X, and the female projecting base point 7a is disposed on the outer side in the tube axis orthogonal direction Y from the grooved shallow point 6b. . The female protrusion 7 has an inner circumference of the female joint 4 so that the height of the female protrusion side face 7b is continuously increased in the tube axis orthogonal direction Y from the female protrusion base 7a toward the grooved shallow point 6b. It is formed to project from the surface 4c in a tapered shape.

  In the joint structure 1 of the pile to which the present invention is applied, when the male joint 3 is inserted into the female joint 4, first, as shown in FIG. 7, the first protrusion 51 and the first female protrusion 71 are The male joint 3 formed with a plurality of slits 31 is deformed so as to incline toward the inner side in the tube axis orthogonal direction Y. At this time, in the pile joint structure 1 to which the present invention is applied, the protruding side surface portion 5d of the first protrusion 51 and the female protrusion side surface portion 7b of the first female protrusion portion 71 are formed in a tapered shape. The male joint 3 can be easily pushed into the female joint 4 by bringing the projection 51 and the first female projection 71 into contact with each other.

  The pile joint structure 1 to which the present invention is applied is such that when the female joint 4 is further pushed into the male joint 3, the male joint 3 that has been deformed so as to incline toward the inner side in the pipe axis orthogonal direction Y is It will be restored by elastic deformation toward the outside in the orthogonal direction Y, and the first protrusion 51 will fit into the first groove 61 as shown in FIG.

  In the pile joint structure 1 to which the present invention is applied, the male joint 3 is pushed into the female joint 4 so that the first protrusion 51 and the second female protrusion 72 are in contact with each other, and the second protrusion As shown in FIG. 9, the first protrusion 51 is fitted into the second groove 62 and the second protrusion 52 is connected to the first groove 61. It will be fitted.

  In the pile joint structure 1 to which the present invention is applied, finally, the male joint 3 is pushed into the female joint 4, the first protrusion 51 and the third female protrusion 73 are braced, and the second protrusion 52. And the second female protrusion 72 are in contact with each other, and the third protrusion 53 and the first female protrusion 71 are in contact with each other. As shown in FIG. 10, the first protrusion 51 is in the third groove. The second projection 52 is fitted into the second groove 62 and the third projection 53 is fitted into the first groove 61.

  The pile joint structure 1 to which the present invention is applied includes a first pile 11 and a second pile by overlapping the key hole 10a of the male joint 3 and the key hole 10a of the female joint 4 and inserting the key member 10b. Therefore, it is possible to prevent the relative rotation with 12.

  Thus, the pile joint structure 1 to which the present invention is applied uses the weight of the second pile 12 and the like, and the female joint 4 of the second pile 12 is pushed into the male joint 3 of the first pile 11. Even if the first pile 11 and the second pile 12 are inclined in the tube axis direction X due to construction errors or the like, the first pile 11 and the second pile 12 can be easily and quickly moved. It becomes possible to connect them.

  In addition, as shown in FIG. 11, the pile joint structure 1 to which the present invention is applied has a protruding bottom surface portion 5 e of the fitting protrusion 5 formed in a hook shape and a groove-shaped bottom surface portion 6 c of the fitting groove portion 6. Is formed in a hook shape, and the fitting projection 5 is engaged so as to mesh with the fitting groove 6, so that the pipe axis direction of the first pile 11 and the second pile 12 as shown in FIG. 10. It becomes possible to increase the resistance to the tensile force of X.

  The pile joint structure 1 to which the present invention is applied has a female projection side surface portion of the female projection portion 7 on the base end 4b side of the female joint 4 in a state where the fitting projection portion 5 is fitted in the fitting groove portion 6. By separating 7b and the fitting protrusion 5, it becomes easy to move the fitting groove part 6 along the fitting protrusion 5 so that it may mention later. The pile joint structure 1 to which the present invention is applied is not limited to this, and the female projection side surface portion 7b of the female projection portion 7 and the fitting projection portion 5 on the base end 4b side of the female joint 4 may not be separated from each other. .

  Here, for example, as shown in FIG. 1, the plurality of steel pipe piles 10 are driven into the ground 8 or the like beside the railroad or the like, so that the construction is performed within a very limited working time such as midnight. It needs to be completed. For this reason, when there is an unexpected hard ground in the ground 8, it becomes difficult to complete the construction within the limited work time, so it is once connected before reaching the predetermined depth. It is necessary to release the connected state of the plurality of steel pipe piles 10 during the work.

  The pile joint structure 1 to which the present invention is applied is formed in a spiral shape by removing the key member 10b from the key hole 10a and rotating the second pile 12 with respect to the first pile 11 as shown in FIG. The connection state of the 1st pile 11 and the 2nd pile 12 is made by moving the fitting groove part 6 along the made fitting protrusion 5, and also pulling up the 2nd pile 12 above the pipe-axis direction X. Can be easily released.

  Furthermore, the pile joint structure 1 to which the present invention is applied has a plurality of through holes 41 formed between the distal end 4a and the proximal end 4b of the female joint 4, as shown in FIG. In a state where the fitting protrusion 5 is fitted, a rod-like member 42 such as a bolt is inserted into the through hole 41 and the male joint 3 is pushed in, so that the male joint 3 is inclined toward the inner side in the tube axis orthogonal direction Y. Can be transformed.

  At this time, in the pile joint structure 1 to which the present invention is applied, when the fitting groove 6 is moved along the fitting protrusion 5 formed in a spiral shape, sand or the like is sandwiched by the fitting groove 6 and moved. Even when the hindrance is hindered, the male joint 3 can be deformed to remove sand and the like, and the second pile 12 can be smoothly rotated with respect to the first pile 11 as shown in FIG. It becomes possible.

  Thereby, the joint structure 1 of the pile to which the present invention is applied is a case where the construction cannot be completed within a limited work time, or when it is no longer necessary to connect the second pile 12, The connected state of the first pile 11 and the second pile 12 once connected can be easily released, and it becomes possible to flexibly cope with a change in process according to the situation of the construction site. Moreover, the joint structure 1 of the pile to which this invention is applied, even when it is used for a temporary steel pipe pile, the removal of the temporary steel pipe pile can be achieved by easily releasing the connected state between the first pile 11 and the second pile 12. Can be made easy.

  Next, a second embodiment of a pile joint structure 1 to which the present invention is applied will be described. In addition, about the component same as the component mentioned above, the description below is abbreviate | omitted by attaching | subjecting the same code | symbol.

  In the second embodiment, the pile joint structure 1 to which the present invention is applied is a step from the distal end 3a side of the male joint 3 toward the proximal end 3b side of the male joint 3 in the pipe axis direction X as shown in FIG. The male joint 3 is formed so that the outer diameter increases, and the inner diameter gradually decreases from the distal end 4a side of the female joint 4 toward the proximal end 4b side of the female joint 4 in the tube axis direction X. A female joint 4 is formed.

  At this time, as shown in FIG. 15, the fitting protrusion 5 is male in the tube axis direction X from the height of the protruding vertex 5 a of the first protrusion 51 on the distal end 3 a side of the male joint 3 in the tube axis direction X. The height of the protrusion vertex 5a of the second protrusion 52 on the base end 3b side of the joint 3 is higher, and the protrusion vertex 5a of the third protrusion 53 is higher than the height of the protrusion vertex 5a of the second protrusion 52. It is formed by projecting from the outer peripheral surface 3c of the male joint 3 so that the height of is higher.

  In the fitting protrusion 5, the outer diameter of the protrusion vertex 5 a of the fitting protrusion 5 that is on the distal end 3 a side of the male joint 3 in the tube axis direction X is on the proximal end 3 b side of the male joint 3 in the tube axis direction X. The fitting protrusion 5 is formed so as to protrude from the outer peripheral surface 3c of the male joint 3 so as to be equal to or less than the inner diameter of the groove-shaped shallow spot 6b of the fitting groove 6 into which the fitting protrusion 5 is fitted.

  At this time, the height of the grooved shallow spot 6b of the first groove portion 61 is formed so that the fitting groove portion 6 does not come into contact with the protruding vertex 5a of the first protruding portion 51 and the second protruding portion 52. The height of the groove-like shallow point 6b of the second groove portion 62 is formed so as not to contact the protruding vertex 5a of the first protrusion 51.

  Thereby, in the joint structure 1 of the pile to which the present invention is applied, when the male joint 3 is inserted into the female joint 4 as shown in FIG. Since only the female protrusion 73 is in contact, the second protrusion 52 is in contact with only the second female protrusion 72, and the third protrusion 53 is in contact with only the first female protrusion 71, each fitting It is possible to reduce the number of times of contact between the mating protrusion 5 and the female protrusion 7 and connect the first pile 11 and the second pile 12 easily and quickly.

  Further, in the second embodiment, the pile joint structure 1 to which the present invention is applied is such that when the male joint 3 is inserted into the female joint 4 as shown in FIG. The projection 71 and the second female projection 72 are fitted into the third groove 63 without being in contact with each other, and the second projection 52 is fitted into the third groove 63 without being brought into contact with the first female projection 71. It becomes what is fitted and it becomes possible to suppress the abrasion by the crimping | contacting of the fitting protrusion 5 and the female protrusion part 7 to the minimum. In the joint structure 1 of the pile to which the present invention is applied, the male joint 3 and the female joint 4 can be thinned in the second embodiment, and the erection accuracy of the first pile 11 and the second pile 12 is improved. It can also be made.

  Furthermore, in the second embodiment, the pile joint structure 1 to which the present invention is applied moves the third groove 63 along the first protrusion 51 and moves along the second protrusion 52 as shown in FIG. The second groove 62 is moved, the first groove 61 is moved along the third protrusion 53, and the second pile 12 is pulled up in the tube axis direction X, so that the first pile 11 is moved upward. By simply rotating the two piles 12 once, the connected state between the first piles 11 and the second piles 12 can be easily and quickly released.

  The pile joint structure 1 to which the present invention is applied is connected once even when the construction cannot be completed within a limited work time or when it is no longer necessary to connect the second pile 12. In addition, the connected state of the first pile 11 and the second pile 12 can be easily and quickly released, and it is possible to flexibly cope with a change in the process according to the situation of the construction site. Moreover, the joint structure 1 of the pile to which this invention is applied is a temporary steel pipe pile by canceling | releasing the connection state of the 1st pile 11 and the 2nd pile 12 easily and rapidly, even when used for a temporary steel pipe pile. Can be easily removed.

  As mentioned above, although the example of embodiment of this invention was demonstrated in detail, all the embodiment mentioned above showed only the example of actualization in implementing this invention, and these are the technical aspects of this invention. The range should not be construed as limiting.

  For example, the pile joint structure 1 to which the present invention is applied is assumed to be used for pipes having a pipe diameter of 600 mm to 1200 mm, but is not limited thereto. Further, the pile joint structure 1 to which the present invention is applied may be such that the female joint 4 is provided at the upper end portion 11 a of the first pile 11 and the male joint 3 is provided at the lower end portion 12 a of the second pile 12. Furthermore, the pile joint structure 1 to which the present invention is applied may connect a plurality of steel pipe piles 10 in the lateral direction.

DESCRIPTION OF SYMBOLS 1: Joint structure 10 of a pile: Steel pipe pile 10a: Key hole 10b: Key member 11: 1st pile 11a: Upper end part 12: Second pile 12a: Lower end part 3: Male joint 3a: Tip (male joint)
3b: Base end (male joint)
3c: Outer peripheral surface (male joint)
31: Slit 4: Female joint 4a: Tip (female joint)
4b: Base end (female joint)
4c: Inner peripheral surface (female joint)
41: Through-hole 42: Bar-shaped member 5: Fitting protrusion 5a: Projection vertex 5b: Projection base 5c: Projection low point 5d: Projection side surface 5e: Projection bottom surface 51: First projection 52: Second projection 53 : Third protrusion 6: fitting groove 6a: groove-like deep point 6b: groove-like shallow point 6c: groove-like bottom part 61: first groove part 62: second groove part 63: third groove part 7: female protrusion part 7a: Female protrusion base 7b: Female protrusion side surface 71: First female protrusion 72: Second female protrusion 73: Third female protrusion 8: Ground A: Area X: Pipe axis direction Y: Pipe axis orthogonal direction Z: Circle Circumferential direction

Claims (6)

A pile joint structure for connecting a plurality of steel pipe piles,
A male joint provided at the end of the first pile, and a female joint provided at the end of the second pile facing the male joint;
The male joint has a fitting protrusion formed in a spiral shape on the outer peripheral surface of the male joint, and a slit is formed so as to extend in the pipe axis direction of the steel pipe pile,
The female joint has a fitting groove formed in a spiral shape on the inner peripheral surface of the female joint, and the male joint is inserted into the female joint by being inserted into the female fitting. The mating protrusion is fitted, and the fitting groove is moved along the fitting protrusion formed in a spiral shape by relatively rotating the first pile and the second pile. The pile joint structure is characterized in that the joint is released . The fitting protrusions are formed to protrude from the outer peripheral surface of the male joint so that the height continuously increases from the protrusion base point of each of the fitting protrusions toward the protrusion vertex. The pile joint structure according to claim 1. The fitting protrusions are arranged on the outer periphery of the male joint such that the protruding low point is arranged on the distal end side of the male joint in the pipe axis direction of the steel pipe pile than the protruding vertex of each fitting protrusion. Formed to protrude from the surface,
The fitting groove portion has an inner circumference of the female joint so that a groove portion shallow point is disposed on the distal end side of the female joint in the tube axis direction of the steel pipe pile than the groove portion deep point of each fitting groove portion. The pile joint structure according to claim 1 or 2, wherein the pile is formed in a groove shape on the surface. The male joint is formed such that the outer diameter gradually increases from the distal end side of the male joint toward the proximal end side of the male joint in the pipe axis direction of the steel pipe pile,
The said female joint is formed so that an internal diameter may become small in steps toward the base end side of the said female joint from the front end side of the said female joint in the pipe-axis direction of a steel pipe pile. The pile joint structure according to any one of 3 above. The fitting protrusion has an outer diameter of a protrusion vertex of the fitting protrusion which is the distal end side of the male joint in the pipe axis direction of the steel pipe pile, and a proximal end side of the male joint in the pipe axis direction of the steel pipe pile. It is formed by projecting from the outer peripheral surface of the male joint so as to be equal to or less than the inner diameter of the grooved shallow point of the fitting groove to be fitted. 4. The pile joint structure according to any one of 4 above. In the female joint, the male joint is inserted into the female joint and the fitting protrusion is fitted into the fitting groove, and the male joint is directed toward the inner side in the direction perpendicular to the pipe axis of the steel pipe pile. The pile joint according to any one of claims 1 to 5, wherein a through-hole through which the rod-shaped member is inserted is formed in the outer peripheral surface of the female joint so that the rod-shaped member is pushed and deformed by the rod-shaped member. Construction.

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