JP2018193735A - Joint structure of pile components and pile body, and joint method for pile components and manufacturing method of pile body - Google Patents

Abstract

To provide a joint structure, a pile body and a joint method capable of easily connecting and effectively exhibiting a binding force without applying complicated processing to pile components.SOLUTION: A joint structure 1 comprises: a first connection portion 103 including a first connection hole 10 provided in one pile component 101 so as to be superposed on the other and penetrating in a radial direction Q; a second connection portion 101a including a second connection hole 20 provided in the other so as to be superposed on the first connection portion 103 and communicating with the first connection hole 10; a wedge member 30 inserted into the connection holes 10, 20 and having a larger width dimension at the first connection hole 10 side than a width dimension at the second connection hole 20 side; and an engaging member 40 fitted between the wedge member 30 and the connection holes 10, 20 and constituted of a plurality of divided bodies 41 divided in a widening direction of the wedge member 30.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a joint structure and a pile body of a pile constituent member, and a joint method for the pile constituent member and a method for manufacturing the pile body.

  Prefabricated piles may be used for foundation piles such as building structures, and sheet piles such as steel sheet piles and steel pipe sheet piles that form retaining walls by being installed continuously. The prefabricated pile is installed by driving into the ground, press-fitting or the like, or by building in a hole previously drilled in the ground. There are various types of ready-made piles, such as steel pipe piles, concrete piles, steel pipe sheet piles, and steel sheet piles, depending on the purpose. Any of the existing piles has a limit in the length of the pile material that can be installed in one process from the manufacturing conditions and transport conditions of the pile material, the construction conditions at the construction site, and the like. For this reason, a pile body of a fixed length can be installed by preparing a plurality of pile materials and installing these pile materials while sequentially connecting them with joints.

Various types of structures have been proposed as joint structures for connecting a plurality of pile materials as described above.
For example, when a pile material is steel materials, such as a steel pipe pile and a steel sheet pile, the welding joint which welds each other pile material can be considered. However, since the welded joint is a welding operation, it takes time to connect, and inspection of the welded portion also occurs, requiring a great deal of time and labor. In addition, because welding work is required at the construction site outside where the pile body is installed, it is affected by the weather such as rain and wind, and it is also affected by the quality of the workers performing the welding work. become. Furthermore, depending on the construction conditions of the construction site, there may be a case where there is not enough space for welding.

A mechanical joint can be considered as an alternative to such a welded joint.
As a mechanical joint, for example, in Patent Document 1, a convex portion and a concave portion are formed to engage each other of the pile materials to be connected, and the convex portion of one pile material is replaced with the other pile material. A structure is disclosed in which a protrusion and a recess are fitted and connected by being inserted into a recess and fitting a fitting member into a gap between the inserted protrusion and the recess.

  Moreover, in patent document 2, as a joint part structure provided in the part which piled up piled materials, while reducing in diameter by the same inclination continuously to each piled material, the hole diameter of the side faced mutually A pair of insertion holes formed in a tapered hole shape having the same diameter, a movement-inhibiting pin that is formed on a taper that is reduced in diameter with the same inclination as the pair of insertion holes and penetrates into the pair of insertion holes, and movement inhibition A joint part structure is disclosed that includes a fixing bolt that passes through a bolt insertion hole formed in a central portion of the working pin, and a reinforcing member that is welded and fixed to the inner pile material and screwed with the fixing bolt. .

Japanese Patent Laying-Open No. 2015-7338 JP 2013-227809 A

However, the technique described in Patent Document 1 has a problem that it is necessary to provide a complicated shape such as a concave portion and a convex portion for engaging with each other in the pile constituting member itself constituting the pile body.
In the technique described in Patent Document 2, it is necessary to form a pair of insertion holes for inserting a movement-inhibiting prevention pin into a tapered hole shape in the pile constituting member itself constituting the pile body. There was a problem that the processing to itself became complicated. Moreover, in the technique of patent document 2, the pile structural member is engaged by inserting and fitting a taper-shaped movement suppression prevention pin in a pair of insertion hole. In such a structure, if the insertion hole formed in each of the pile constituent members is displaced, it becomes a resistance when the anti-movement prevention pin is inserted and fitted. When such resistance occurs, there has been a problem that the movement-inhibiting prevention pin cannot be inserted sufficiently, or even if it can be inserted sufficiently, a large pressing force is required for the insertion operation. In addition, even if the movement prevention preventing pin can be inserted and fitted, the frictional force in the insertion direction is exerted as an insertion resistance as a force against the pushing force, and the pile constituent members are restrained. There was a problem that the force in the direction orthogonal to the acting insertion direction could not be sufficiently exhibited. Furthermore, in the technique described in Patent Document 2, such pushing force is generated by tightening the bolts, and the work of tightening with a torque wrench after the bolts are arranged and temporarily tightened at each joint portion is time consuming. It was a labor-intensive work.

  Therefore, the present invention has been made in view of the above-described circumstances, and can be easily connected without subjecting the pile constituent members to complicated processing, and the binding force that restrains the pile configurations together. The present invention provides a joint structure and a pile body of a pile constituent member capable of effectively exhibiting the above, a joint method of the pile constituent member, and a manufacturing method of the pile body.

In order to solve the above problems, the present invention employs the following means.
That is, the joint structure of pile constituent members according to one aspect of the present invention is a joint structure of pile constituent members that connect pile constituent members constituting a pile body to each other, and A first connecting portion provided so as to overlap with the other pile constituent member and having a first connecting hole penetrating in a direction in which the pile constituent members overlap each other; and the first connection to the other pile constituent member A second connecting portion provided to overlap the first connecting hole and having a second connecting hole communicating with the first connecting hole, and inserted into the first connecting hole and the second connecting hole, A wedge member having a shape in which the width dimension of the proximal end insertion portion on the first connection hole side is larger than the width dimension of the distal end insertion portion on the second connection hole side; the wedge member; the first connection hole; The tip of the wedge member is fitted between the second connecting holes. An engagement member configured by a plurality of divided bodies that are divided in a direction in which the width of the proximal end insertion portion is widened with respect to the insertion portion, and the divided body includes the second connection portion in the first connection portion. It has a 1st control part engaged with the surface on the opposite side to the surface which overlaps with a connection part.

According to this configuration, the joint structure can be constructed as follows.
That is, one pile constituent member provided with the 1st connection part in which the 1st connection hole was formed, and the other constituent member provided with the 2nd connection part in which the 2nd connection hole was formed, The first connecting portion and the second connecting portion are arranged so as to overlap each other so that the connecting hole and the second connecting hole communicate with each other. Next, a plurality of divided members constituting the engaging member are arranged in the first connecting hole and the second connecting hole, and the wedge member is further connected to the wedge member, the first connecting hole, and the second connecting hole. Insert the plurality of divided bodies so as to be arranged between the inner peripheral surface and the first restricting portion formed in the divided body opposite to the surface overlapping the second connecting portion in the first connecting portion. Engage with the side surface. At this time, the dividing direction of the divided body is larger in the direction in which the width dimension of the proximal end insertion portion on the first connection hole side is larger than the width dimension of the distal end insertion portion on the second connection hole side of the wedge member. The direction of the wedge member and the position of the divided body are adjusted so as to match. By further pushing the wedge member in this state, the plurality of divided bodies constituting the engaging member move so as to further widen the mutual interval in the direction in which the width of the wedge member is expanded, that is, the direction in which the engaging member is divided. . At this time, when the wedge member is pushed in, a force acts in a direction to be pushed into the divided body as well, but the first restricting portion is engaged with the opposite side of the surface of the first connecting portion that overlaps the second connecting portion. By doing, it can control that a division object moves with a wedge member. As a result, the divided body is pressed against the inner peripheral surfaces of the first connection hole and the second connection hole to generate a binding force, and the one connection member and the second connection hole in which the first connection hole is formed. The other pile constituent member formed with can be connected.
Here, about the 1st connection hole and 2nd connection hole which are formed in a pile structural member, it is sufficient if it forms in the position which can mutually communicate, and it is not necessary to set it as a complicated shape. Moreover, the hole which inserts a wedge member turns into a part enclosed by the division body, and is not made to insert directly in the hole formed in the pile structural member. For this reason, even if there is a slight misalignment between the first connecting hole and the second connecting hole, the step due to the misalignment does not become the insertion resistance of the wedge member, and the wedge member can be easily inserted. Can be fitted. In addition, the binding force for connecting the pile constituent members to each other is given by a plurality of divided members constituting the engaging member inserted into the first connecting hole and the second connecting hole. It is not given directly. Therefore, the wedge member can be easily inserted and pushed in, and the divided body is effective in the direction perpendicular to the direction in which the wedge member is inserted with respect to the pile constituting member while suppressing the influence of the resistance during pushing. It is possible to exert a restraining force by applying a force to. Therefore, it is possible to easily and effectively apply a restraining force to the pile constituting member by simply pushing the wedge member without performing tightening with a bolt.

  Moreover, in the joint structure of the pile structural member which concerns on 1 aspect of this invention, a said 1st connection hole and a said 2nd connection hole are good also as what is formed in the substantially identical shape.

  According to this configuration, the first connection hole and the second connection hole are formed in substantially the same shape. For this reason, the 1st connection hole and the 2nd connection hole which can mutually communicate easily can be formed by drilling in the state piled up with respect to the pile component member piled up mutually. Further, it is possible to prevent a step between the inner peripheral surfaces of the first connecting hole and the second connecting hole, so that friction or the like is generated by the step, and the divided bodies widen each other. There is no risk of hindering movement.

  Moreover, in the joint structure of the pile structural member which concerns on 1 aspect of this invention, the said division body protrudes toward said 1st connection hole and said 2nd connection hole, and said 1st connection hole and said 1st It is good also as what has an engaging part engaged with the internal peripheral surface of a 2nd connection hole.

  According to this structure, when the engaging part of a division body engages with the internal peripheral surface of a 1st connection hole and a 2nd connection hole, binding force is more effectively with a division body with respect to a pile structural member. Can be given.

  Moreover, in the joint structure of the pile structural member which concerns on 1 aspect of this invention, the said wedge member is good also as what has a protrusion part which protrudes toward the said division body and engages with the said division body.

  According to this configuration, when the protrusion of the wedge member is engaged with the divided body, the state in which the wedge member is fitted to the divided body is loosened, and the binding force acting on the pile constituent member by the divided body is reduced. It can prevent more reliably.

  Moreover, in the joint structure of the pile structural member which concerns on 1 aspect of this invention, said 2nd connection hole has penetrated said 2nd connection part, and said division body in said 2nd connection part It is good also as what has a 2nd control part engaged with the surface on the opposite side to the surface which overlaps with said 1st connection part.

  According to this configuration, the second restricting portion engages with the surface of the second connecting portion opposite to the surface overlapping the first connecting portion, so that the divided body inserted from the first connecting hole falls off. Can be prevented.

  Moreover, in the joint structure of the pile structural member which concerns on 1 aspect of this invention, the said engagement member is good also as what is divided | segmented by the some said division body in the direction orthogonal to the axial direction of the said pile body.

  According to this configuration, by inserting the wedge member, the divided body acts on the inner peripheral surfaces of the first connection hole and the second connection hole in a direction perpendicular to the axial direction of the pile body. And will exert restraint force. For this reason, even if an external force acts in the axial direction by driving, press-fitting, or pulling out on the pile body constituted by the pile constituent members, the pile constituent members, the engaging members, and the wedge members are caused by the deformation caused by the external forces. It is possible to prevent the restraint relationship between the loosening and the restraining force on the pile constituent members from being reduced.

  Moreover, the pile body which concerns on 1 aspect of this invention is equipped with the several pile structural member which has the joint structure of the said pile structural member, and was mutually connected.

  According to this structure, a pile body can be comprised by the pile structural members connected easily and firmly by the joint structure of a pile structural member.

  Moreover, the joint method of the pile structural member which concerns on 1 aspect of this invention is the joint method of the pile structural member which piles up and connects the pile structural members which comprise a pile body, Comprising: On the said one pile structural member The first connection hole provided through the provided first connection portion and the second connection hole provided in the second connection portion provided in the other pile constituent member communicate with each other. A pile constituent member arranging step of arranging the first connecting portion of one of the pile constituent members and the second connecting portion of the other of the pile constituent members, and an engaging member The plurality of divided bodies arranged side by side along the inner peripheral surfaces of the first connection hole and the second connection hole are surrounded by the plurality of divided bodies from the first connection hole to the first connection hole. The division constituting the engaging member so as to form an insertion hole communicating with the second connecting hole Is inserted into the first connecting hole and the second connecting hole from the first connecting hole, and the first restricting portion formed in the divided body is inserted into the second connecting portion in the first connecting portion. An engagement member disposing step for engaging a surface opposite to the surface overlapping with the portion, and a wedge member having a shape in which the width dimension of the proximal end insertion portion is larger than the width dimension of the distal end insertion portion. On the other hand, the direction in which the width of the proximal end insertion portion is widened is a direction in which the engagement member is divided by the plurality of divided bodies, and the distal end insertion portion is the second connecting hole side. Inserting the wedge member into the insertion hole so that the insertion portion is on the first connecting hole side, and pushing the wedge member inserted into the insertion hole into the insertion hole, The divided body is pushed toward the inner peripheral surfaces of the first connection hole and the second connection hole. And a gel engagement member expanding step.

According to this method, the joint structure can be constructed as follows.
That is, as a pile constituent member arrangement process, one pile constituent member provided with the 1st connection part in which the 1st connection hole was formed, and the other provided with the 2nd connection part in which the 2nd connection hole was formed The first connecting portion and the second connecting portion are overlapped with each other so that the first connecting hole and the second connecting hole communicate with each other. Next, as an engaging member arrangement | positioning process, the several division body which comprises an engaging member is arrange | positioned along an internal peripheral surface in a 1st connection hole and a 2nd connection hole. Next, as a wedge member inserting step, the wedge member is divided into a plurality of divided bodies so that each of the plurality of divided bodies is disposed between the wedge member and the inner peripheral surfaces of the first connection hole and the second connection hole. It inserts into the insertion hole formed by. At this time, the dividing direction of the divided body is aligned with the direction in which the width dimension of the proximal end insertion portion on the first connection hole side widens with respect to the width dimension of the distal end insertion portion on the second connection hole side of the wedge member. Thus, the direction of the wedge member and the position of the divided body are adjusted. Then, as the engaging member expanding step, by further pushing the wedge member in this state, the plurality of divided bodies constituting the engaging member are further expanded in the direction in which the width of the wedge member is expanded, that is, in the direction in which the engaging member is divided. Move to increase the distance between each other. At this time, when the wedge member is pushed in, a force acts in a direction to be pushed into the divided body as well, but the first restricting portion is engaged with the opposite side of the surface of the first connecting portion that overlaps the second connecting portion. By doing, it can control that a division object moves with a wedge member. As a result, the divided body presses the inner peripheral surfaces of the first connection hole and the second connection hole to generate a binding force, and the one connection member and the second connection hole in which the first connection hole is formed. The other pile constituent member formed with can be connected.
Here, about the 1st connection hole and 2nd connection hole which are formed in a pile structural member, as long as it is formed in the position which can mutually communicate, it is not necessary to set it as a complicated shape. Moreover, the hole which inserts a wedge member becomes a part enclosed with the division body, and a wedge member is not what is directly inserted in the hole formed in the pile structural member. For this reason, even if there is a slight misalignment between the first connecting hole and the second connecting hole, the step due to the misalignment does not become the insertion resistance of the wedge member, and the wedge member can be easily inserted. Can be fitted. In addition, the binding force for connecting the pile constituent members to each other is given by a plurality of divided members constituting the engaging member inserted into the first connecting hole and the second connecting hole. It is not given directly. Therefore, the wedge member can be easily inserted and pushed in, and the divided body is effective in the direction perpendicular to the direction in which the wedge member is inserted with respect to the pile constituting member while suppressing the influence of the resistance during pushing. It is possible to exert a restraining force by applying a force to. Therefore, it is possible to easily and effectively apply a restraining force to the pile constituting member by simply pushing the wedge member without performing tightening with a bolt.

  Moreover, in the joint method of the pile structural member which concerns on 1 aspect of this invention, in the said engagement member expansion process, in the press-fitting machine which hold | grips the surrounding surface of the said pile body with a holding part, and press-fits the said pile body to an axial direction. The grip portion may be configured to push the wedge member into the insertion hole by the grip portion by gripping the pile constituting member at a position where the wedge member is inserted into the insertion hole.

  According to this method, it is not necessary to prepare another means for pushing in the wedge member by pushing the wedge member into the insertion hole by using the force gripped by the gripping portion of the press-fitting machine. The work which concerns on can be advanced. Moreover, the force which pushes in a wedge member can be stabilized by using the force hold | gripped by the holding part of a press-fitting machine, and the quality of a joint can be made favorable.

  Moreover, the manufacturing method of the pile body which concerns on 1 aspect of this invention is the press-fit process of hold | gripping the said pile structural member by the holding part of a press-fitting machine, and press-fitting in the ground, The said pile structural member press-fitted by the said press-fit process The upper end portion is the first connection portion or the second connection portion, and the lower end portion of the pile component member to be newly connected is the second connection portion or the first connection portion. The pile body is constituted by the plurality of pile constituent members by repeating the press-fitting step a plurality of times while performing the joint step.

  According to this method, the pile body comprised by the several pile structural member can be manufactured easily and firmly by implementing a press-fit process and a joint process.

  According to the present invention, it is possible to easily connect the pile constituent members without performing complicated processing on the pile constituent members, and to effectively exert the restraining force that restrains the pile constituent members. it can.

It is a schematic diagram which shows the pile body of 1st embodiment of this invention. It is a side view which shows the joint structure of 1st embodiment of this invention. It is sectional drawing fractured | ruptured by the cutting line II in FIG. It is sectional drawing fractured | ruptured by the cutting line II-II in FIG. It is a front view which shows the joint structure of 1st embodiment of this invention. It is a side view which shows a 2nd connection part in the joint structure of 1st embodiment of this invention. It is a side view which shows a 1st connection part in the joint structure of 1st embodiment of this invention. It is a perspective view which shows a wedge member in the joint structure of 1st embodiment of this invention. It is explanatory drawing which shows a press-fit process in the joint method of 1st embodiment of this invention. It is sectional drawing fractured | ruptured by the cut surface III-III in FIG. 9 which shows the holding | grip state of the steel pipe in a press-fit process in the joint method of 1st embodiment of this invention. It is explanatory drawing which shows a pile structural member arrangement | positioning process in the joint method of 1st embodiment of this invention. It is explanatory drawing which shows a pile structural member arrangement | positioning process, an engagement member arrangement | positioning process, and a wedge member insertion process in the joint method of 1st embodiment of this invention. It is explanatory drawing which shows an engaging member expansion process in the joint method of 1st embodiment of this invention. It is sectional drawing fractured | ruptured by the cut surface IV-IV in FIG. 13 which shows the holding | grip state of the steel pipe in an engagement member expansion process in the coupling method of 1st embodiment of this invention. It is explanatory drawing which shows a press-fit process in the joint method of 1st embodiment of this invention. It is a side view which shows the pile body of the 1st modification of 1st embodiment of this invention. It is sectional drawing which shows the pile body of the 2nd modification of 1st embodiment of this invention. It is a side view which shows the pile body of the 3rd modification of 1st embodiment of this invention. It is sectional drawing seen from the axial direction which shows the pile body of the 4th modification of 1st embodiment of this invention. It is a side view which shows the pile body of the 4th modification of 1st embodiment of this invention. It is sectional drawing which shows the detail of the joint structure in the pile body of the 4th modification of 1st embodiment of this invention. It is a front view which shows the joint structure of the 5th modification of 1st embodiment of this invention. It is a perspective view which shows the detail of the engaging member in the joint structure of the 6th modification of 1st embodiment of this invention. It is a schematic diagram which shows the pile body of 2nd embodiment. It is sectional drawing fractured | ruptured by the cutting line II shown in FIG. 2 in the joint structure of the modification of 2nd embodiment. It is sectional drawing fractured | ruptured by the cutting line II-II shown in FIG. 2 in the joint structure of the modification of 2nd embodiment. It is a front view which shows the joint structure of the modification of 2nd embodiment.

(First embodiment)
Hereinafter, a first embodiment according to the present invention will be described with reference to FIGS.
FIG. 1 shows a pile body of the present embodiment. As shown in FIG. 1, the pile body 100 is a steel pipe pile in the present embodiment, and a plurality of pile bodies 100 are arranged in the ground A at a predetermined pitch so that the upper end portion 100a protrudes from the ground portion. Each pile body 100 is configured by connecting a plurality of steel pipes 101 that are pile constituent members in an axial direction P that is a direction along the axis L100 of the pile body 100. The steel pipe 101 includes a tubular main body portion 102 and a joint portion 103 that is connected to one end serving as a lower end of the main body portion 102 and has a tubular shape having an inner diameter substantially equal to the outer diameter of the main body portion 102. And as shown in FIG. 2, the joint part 103 of the steel pipe 101 is inserted as a 1st connection part in the upper end part 101a of the lower steel pipe 101 arrange | positioned under the said steel pipe 101 as a 2nd connection part. The pile body 100 is overlaid in a radial direction Q that is a direction orthogonal to the axial direction P of the pile body 100. The joint part 103 of one steel pipe 101 arranged above and the upper end part 101a of the other steel pipe 101 arranged below the steel pipe 101 are connected by the joint structure 1 of this embodiment. Moreover, in this embodiment, the main-body part 102 and the coupling part 103 of the steel pipe 101 are joined by the welding part 104 which welded each other. As shown in FIG. 1, the steel pipe 101 located at the lowermost portion is not provided with the steel pipe 101 below, and thus the joint portion 103 is not provided at the lower end of the main body portion 102.

Next, the detail of the joint structure 1 of this embodiment is demonstrated.
As shown in FIGS. 2 to 7, the joint structure 1 of the present embodiment has a first connecting hole 10 and a joint portion 103 provided in an upper steel pipe 101 and a second connecting hole 20 and a lower part. An upper end portion 101a inserted into the joint portion 103 of the upper steel pipe 101, a wedge member 30 inserted into the first connection hole 10 and the second connection hole 20, and a wedge member 30; An engagement member 40 fitted between the first connection hole 10 and the inner peripheral surfaces 10a of the second connection hole 20 is provided.
The upper end portion 101 a of the lower steel pipe 101 is inserted into the joint portion 103 of the upper steel pipe 101, thereby overlapping the joint portion 103 in the radial direction Q that is a direction orthogonal to the axial direction P of the pile body 100. . The joint portion 103 has a first connection hole 10 that penetrates in the radial direction Q. In the present embodiment, a plurality of first connection holes 10 are formed at equal intervals in the circumferential direction R at a position that is substantially the center of the joint portion 103 in the axial direction P. Each first connecting hole 10 is formed in a circular shape with substantially the same diameter from the outer peripheral surface 103 a to the inner peripheral surface 103 b of the joint portion 103.

  The upper end portion 101 a has a second connection hole 20 that communicates with the first connection hole 10 so as to substantially coincide with the first connection hole 10 and the central axis C and penetrates in the radial direction Q. A plurality of second connection holes 20 are also formed in the upper end portion 101a in the circumferential direction R at the same interval as the interval between the first connection holes 10. Each second connection hole 20 is formed in a circular shape with substantially the same diameter from the outer peripheral surface 102 a to the inner peripheral surface 102 b in the main body 102 of the steel pipe 101. Here, the second connecting hole 20 is formed in substantially the same shape as the first connecting hole 10, that is, in a circular shape having substantially the same diameter. For this reason, the inner peripheral surface 10a of the first connecting hole 10 and the inner peripheral surface 20a of the second connecting hole 20 are formed continuously.

  As shown in FIGS. 3, 4, and 8, the wedge member 30 includes a distal end insertion portion 31 inserted into the second connection hole 20, and a radial direction of both steel pipes 101 and 101 than the distal end insertion portion 31. Q is provided at a position on the outer peripheral side of the Q and has a proximal end insertion portion 32 inserted into the first connecting hole 10. The wedge member 30 is formed in a taper shape in which the width dimension B1 along the circumferential direction R in the pile body 100 gradually increases from the distal end, which is the inner peripheral side to the outer peripheral side in the radial direction Q, toward the base end. Therefore, the base end insertion portion 32 has a larger width dimension B1 than the distal end insertion portion 31. In the wedge member 30, the side surface 30 a forming the tapered shape on both sides in the circumferential direction R has a protrusion 33 projecting in the circumferential direction R. The protrusions 33 extend linearly along the axial direction P, and a plurality of protrusions 33 are formed along the radial direction Q. Moreover, each protrusion 33 inclines and protrudes sharply so that it may go to the outer peripheral side from the radial direction Q inner peripheral side as it goes to the outer side along the circumferential direction R from the side surface 30a. On the other hand, in this embodiment, in the wedge member 30, the end faces 30 b on both sides in the axial direction P of the pile body 100 are arcuate along the inner peripheral surfaces 10 a and 20 a of the first connection hole 10 and the second connection hole 20. The width B2 of the wedge member 30 that is formed along the axial direction P is substantially equal to the diameter of the inner peripheral surfaces 10a and 20a.

  The engaging member 40 is composed of a plurality of divided bodies 41. The divided body 41 is divided and arranged side by side in the circumferential direction R that is the direction in which the width of the wedge member 30 increases along the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20. . In the present embodiment, there are two divided bodies 41. Each divided body 41 is formed in a substantially semicircular shape and is provided with a distal end portion 42 disposed in the second connection hole 20 and a proximal end formed in a substantially semicircular shape and disposed in the first connection hole 10. Part 43.

  The distal end portion 42 includes an engagement surface 42a along the inner peripheral surface 20a of the second connection hole 20, and an insertion surface 42b disposed on the center axis C side of the second connection hole 20 with respect to the engagement surface 42a. And have. The engagement surface 42 a is formed in an arc shape when viewed in the direction of the central axis C of the first connection hole 10 and the second connection hole 20. Further, the insertion surface 42b is disposed substantially parallel to the axial direction P of the pile body 100 so as to form a string with respect to the arcuate engagement surface 42a when viewed in the central axis C direction.

  The base end portion 43 includes an engagement surface 43a along the inner peripheral surface 10a of the first connection hole 10, and an insertion surface disposed on the center axis C side of the first connection hole 10 with respect to the engagement surface 43a. 43b. Similar to the tip portion 42, the engagement surface 43 a is formed in an arc shape when viewed in the direction of the central axis C of the first connection hole 10 and the second connection hole 20. The inserted surface 43b is disposed substantially parallel to the axial direction P of the pile body 100 so as to form a string with respect to the arcuate engagement surface 43a when viewed in the direction of the central axis C.

  Here, the circumferential direction R of the pile body 100 at the position of the center axis C of the first connection hole 10 and the second connection hole 20, that is, the maximum separation dimension from the inserted surfaces 42 b and 43 b to the engagement surfaces 42 a and 43 a. Is a dimension smaller than the radius of the first connecting hole 10 and the second connecting hole 20.

  The inserted surfaces 42 b and 43 b of the distal end portion 42 and the proximal end portion 43 are first connected along the circumferential direction R of the pile body 100 as they go from the radial direction Q inner circumferential side to the outer circumferential side of the pile body 100. From the central axis C of the hole 10 and the second connecting hole 20, the engaging surfaces 42a, 43a are inclined toward the inner peripheral surfaces 10a, 20a facing each other, and are continuous with each other. Further, the engagement surfaces 42a and 43a of the distal end portion 42 and the proximal end portion 43 are also continuous with each other. And the two division bodies 41 are arrange | positioned so that the insertion surfaces 42b and 43b of the front-end | tip part 42 and the base end part 43 of each other may face each other. Thereby, the insertion hole 40a where the width dimension along the circumferential direction R of the pile body 100 becomes large as it goes to the outer peripheral side from the radial direction Q inner peripheral side of the pile body 100 by the insertion surfaces 42b and 43b of the two divided bodies 41. Is formed.

  Engagement portions 44 that protrude toward the inner peripheral surfaces 10 a and 20 a of the first connection hole 10 and the second connection hole 20 are provided on the engagement surfaces 42 a and 43 a of each divided body 41. The engaging portion 44 extends linearly along the inner peripheral surfaces 10a, 20a of the first connecting hole 10 and the second connecting hole 20, and protrudes sharply. In the present embodiment, the engaging portion 44 has its tip bite into the inner peripheral surfaces 10a, 20a of the first connecting hole 10 and the second connecting hole 20 in an elastically compressed and deformed state, and the inner peripheral surfaces 10a, 20a. Is pressed. The engaging portion 44 may be in a state of being plastically deformed.

  The base end portion 43 of the divided body 41 slightly protrudes from the outer peripheral surface 103a of the upper steel pipe 101, and the protruding base ends have radial directions of the first connection hole 10 and the second connection hole 20 ( The 1st control part 43d which protrudes in the flange shape to the circumferential direction R) outer peripheral side in the pile body 100 is provided. 43 d of 1st control parts are engaged with the outer peripheral surface 103a on the opposite side to the internal peripheral surface 103b used as the surface which overlaps with the lower steel pipe 101 in the upper steel pipe 101, and the division body 41 is radial direction Q of the pile body 100. The movement to the inner circumference side is regulated. Here, in the present embodiment, on the outer peripheral surface 103a of the upper steel pipe 101, the peripheral portion 103d of the first connecting hole 10 with which the first restricting portion 43d is engaged corresponds to the first restricting portion 43d and is planar. Is formed. Moreover, the front-end | tip part 42 of the division body 41 protrudes slightly from the internal peripheral surface 102b of the lower steel pipe 101, and the radial direction of the 1st connection hole 10 and the 2nd connection hole 20 is in the protruded front-end | tip. A second restricting portion 42d that projects in a flange shape toward the outer peripheral side is provided. The second restricting portion 42 d is engaged with the inner peripheral surface 102 b opposite to the outer peripheral surface 102 a which is a surface overlapping the upper steel pipe 101 in the lower steel pipe 101, and the divided body 41 is in the radial direction Q of the pile body 100. The movement to the outer peripheral side is regulated.

Next, a joint method for connecting the steel pipes 101 with the joint structure 1 as described above will be described in the manufacturing method of the pile body 100 configured by connecting the steel pipes 101.
FIG. 9 shows a state in which the next pile body 100 is installed with a plurality of pile bodies 100 already installed on the ground A. The pile body 100 is installed on the ground A by performing a press-fitting step S10 and a joint step S20 that constitute the method for manufacturing the pile body 100 of the present embodiment. In the press-fitting step S10, the steel pipe 101 is press-fitted into the ground A by the press-fitting machine 200.
Here, the steel pipe 101 to be press-fit has a main body portion 102 and a joint portion 103 connected to the lower end of the main body portion 102 in order to constitute the joint structure 1 of the present embodiment. The first connecting hole 10 is provided as a connecting portion, and the upper end portion 101a is processed in advance so as to have the second connecting hole 20 as a second connecting portion. The lowermost steel pipe 101 does not have the joint portion 103 as described above.

First, an example of the press-fitting machine 200 used in the press-fitting step S10 will be described.
As shown in FIG. 9, the press-fitting machine 200 includes a main body portion 201, a support portion 202 that is provided in the main body portion 201 and receives a reaction force that receives a reaction force generated during press-fitting, and an axial direction with respect to the main body portion 201. And a chuck frame 203 movably provided in the press-fitting direction M of the pile body 100 to be P. The support part 202 has a basic gripping part 202a that can be fitted to and detached from the inner peripheral surface of the steel pipe 101 by approaching and separating from each other. In this embodiment, it has the three basic | foundation holding parts 202a so that the three steel pipes 101 can be made into a reaction force receiver. In FIG. 9, the three steel pipes 101 that have already been installed are used as reaction force receivers. However, when the necessary number of reaction force receivers is not installed, a reaction force receiver corresponding to the steel pipe 101 is installed in advance. It is gripped by the support unit 202. The support portion 202 is provided so as to be movable in a direction N intersecting the press-fitting direction M with respect to the main body portion 201. The main body 201 is provided with a basic movement drive unit (not shown) that moves the support unit 202. Therefore, the main body 201 is moved relative to the installed steel pipe 101 by moving the support portion 202 relative to the main body 201 by a basic movement drive unit (not shown) while gripping the steel pipe 101 serving as a reaction force receiver. The steel pipe 101 can be press-fitted into the new installation position S by being moved. The basic gripping portions 202a may be provided to such an extent that they can receive a reaction force generated during press-fitting, and the number thereof can be arbitrarily changed.

  The chuck frame 203 includes a main cylinder 204 that moves the chuck frame 203 in the press-fitting direction M and a chuck portion 205 that holds the steel pipe 101 to be press-fitted. As shown in FIG. 10, the chuck portion 205 has a plurality of chuck claws 206 arranged in an annular shape, and a cylinder 208 that advances and retracts toward the steel pipe 101 into which the chuck claws 206 are press-fitted. The steel pipe 101 to be press-fitted is inserted into an array of chuck claws 206 arranged in an annular shape. The chuck claw 206 has a gripping surface 206a formed with a curvature corresponding to the curvature of the outer peripheral surface of the steel pipe 101 to be press-fitted. By moving the chuck claw 206 forward by the driving force of the cylinder 208, the steel pipe 101 can be held by pressing the gripping surface 206a on the outer peripheral surface of the steel pipe 101 with a desired pressure. The state in which the steel pipe 101 is gripped can be released by retreating.

  The chuck frame 203 is provided with a chuck rotation drive unit (not shown) that rotates the chuck unit 205 around the axis L100 of the steel pipe 101 into which the chuck unit 205 is press-fitted. For this reason, if the chuck rotation driving unit and the main cylinder 204 (not shown) are driven while the steel pipe 101 is gripped by the chuck claws 206, the steel pipe 101 is rotated about the axis L100 while the steel pipe 101 is rotated about the axis L100 with respect to the ground A. It is possible to push in (ie press fit) or pull out.

With such a press-fitting machine 200, the steel pipe 101 is press-fitted as shown in FIG. And if the press fitting of the steel pipe 101 is completed to the position where the upper end 101a of the steel pipe 101 can be gripped by the chuck part 205, the joint process S20 by the joint method in the present embodiment is performed as the next process.
In the joint process S20, the pile constituent member arrangement process S21 in which another steel pipe 101 connected to the steel pipe 101 is arranged on the steel pipe 101 press-fitted in the previous process, the first connection hole 10, and the second connection. An engagement member arrangement step S22 for inserting the engagement member 40 into the hole 20, a wedge member insertion step S23 for inserting the wedge member 30 into the insertion hole 40a formed by the divided body 41 constituting the engagement member 40, and a wedge An engagement member expansion step S24 for expanding the divided body 41 constituting the engagement member 40 by pushing the member 30;

  In the pile component arranging step S21, first, the chuck frame 203 is raised with respect to the main body 201 in the press-fitting machine 200, thereby moving the chuck portion 205 to a position spaced upward from the press-fitted steel pipe 101. Next, as shown in FIG. 11, another steel pipe 101 to be newly connected is suspended by a crane or the like (not shown), and is lowered from above the chuck frame 203 to insert the other steel pipe 101 into the chuck portion 205. And the other steel pipe 101 is hold | gripped by making the chuck nail | claw 206 of the press-fitting machine 200 advance with respect to the other steel pipe 101 inserted in the chuck | zipper part 205. FIG. Next, as shown in FIG. 12, in the press-fitting machine 200, by lowering the chuck frame 203 with respect to the main body 201, the other steel pipe 101 gripped by the chuck part 205 is lowered, and thereby the steel pipe 101 press-fitted. Is inserted into the joint portion 103 of another steel pipe 101. Here, the other steel pipe 101 to be connected is gripped by using the press-fitting machine 200, so that the already press-fitted steel pipe 101 and the axis line L100 of the other steel pipe 101 to be connected can be matched. The upper end portion 101a can be easily inserted into the joint portion 103 of another steel pipe 101.

Next, in FIG. 12, by rotating the chuck portion 205 with respect to the chuck frame 203 in the press-fitting machine 200, the position of the other steel pipe 101 to be connected around the axis L100 is adjusted with respect to the press-fitted steel pipe 101. . Accordingly, the second connecting hole 20 formed in the press-fit steel pipe 101 and the first connecting hole 10 of another steel pipe 101 to be connected can be communicated with each other so that their center axes C coincide with each other. it can. At this time, the second connecting hole 20 and the first connecting hole 10 may be guided so as to coincide with each other by a key structure or the like.
In addition, it is good also as a structure which does not provide the 1st connection hole 10 and the 2nd connection hole 20 in the steel pipe 101 previously. And in this process, after inserting the upper end part 101a of one steel pipe 101 in the joint part 103 of the other steel pipe 101, the 1st connection hole 10 and the 2nd connection hole 20 are penetrated so that both the steel pipes 101 may be penetrated. May be perforated. Since the first connecting hole 10 and the second connecting hole 20 have substantially the same shape as described above, the first connecting hole 10 and the second connecting hole 20 can be easily formed by such a processing method. It is possible to prevent the occurrence of a step between the first connecting hole 10 and the second connecting hole 20. Moreover, in the above, although the position adjustment of the other steel pipe 101 connected with respect to the press-fitted steel pipe 101 was implemented using the press-fitting machine 200, it is not restricted to this, The other steel pipe 101 suspended is manually operated. The position may be adjusted.

Next, engaging member arrangement | positioning process S22 is implemented.
In the engagement member arranging step S22, first, in the state shown in FIG. 12, the divided body 41 constituting the engagement member 40 is first changed until the first restricting portion 43d can be engaged with the outer peripheral surface 103a of the upper steel pipe 101. Insert into one connecting hole 10 and second connecting hole 20. Here, as shown in FIG. 5, in this embodiment, the two divided bodies 41 are arranged side by side in the circumferential direction R orthogonal to the axial direction P of the steel pipe 101 to be connected. The distal end portion 42 of each divided body 41 is disposed in the second connecting hole 20, the proximal end portion 43 is disposed in the first connecting hole 10, and an insertion hole 40 a is formed between the two divided bodies 41. The Here, since the engagement member 40 has a configuration in which the insertion hole 40a is formed between the two divided bodies 41, the width of the insertion hole 40a is set to be smaller than a predetermined width dimension. By inserting, it can insert easily, without interfering with the internal peripheral surfaces 10a and 20a of the 1st connection hole 10 and the 2nd connection hole 20. FIG. As described above, the base end portion 43 of the divided body 41 has the first restricting portion 43d. For this reason, it is possible to engage the 1st control part 43d with the outer peripheral surface 103a of the steel pipe 101 in the state which inserted the division body 41 in the 1st connection hole 10 and the 2nd connection hole 20. FIG. Thereby, the division body 41 which comprises the engaging member 40 can be positioned, and it can insert reliably only an appropriate amount, and the division body 41 will shift | deviate to the radial direction Q inner peripheral side of the pile body 100. This can also be prevented. Then, the engagement surfaces 42a and 43a of the distal end portion 42 and the base end portion 43 of each divided body 41 are brought into contact with the inner peripheral surfaces 10a and 20a of the first connection hole 10 and the second connection hole 20 in the inserted state. Let Thereby, the first restricting portion 43d is engaged with the outer peripheral surface 103a of the upper steel pipe 101, the second restricting portion 42d is engaged with the inner peripheral surface 102b of the lower steel pipe 101, and the inserted divided body 41 is piled. It is possible to prevent the body 100 from being displaced in the radial direction Q inner peripheral side and outer peripheral side.

  Further, as shown in FIG. 3, the engaging member 40 is divided into two divided bodies 41, and there is a gap between the divided bodies 41. The width dimension along the direction R can be adjusted. For this reason, in pile constituent member arrangement process S21, the central axis C of the 1st connecting hole 10 and the 2nd connecting hole 20 shifts by construction error, or the 1st connecting hole 10 or the 2nd connecting hole 20 Even if the relative positions of the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20 are shifted in the circumferential direction R of the pile body 100 The divided body 41 of the member 40 can be easily inserted into the first connection hole 10 and the second connection hole 20.

Next, the wedge member insertion step S23 is performed.
That is, the wedge members 30 are sequentially inserted from the distal end insertion portion 31 into the insertion holes 40a formed between the divided bodies 41 in the engaging member arranging step S22 from the outer peripheral side in the radial direction Q of the pile body 100. The direction of the wedge member 30 is adjusted so that the direction in which the width dimension of the wedge member 30 changes coincides with the direction in which the engagement member 40 is divided by the divided body 41. Here, although the width dimension of the insertion hole 40a differs depending on the positions and diameters of the first connection hole 10 and the second connection hole 20, the wedge member 30 is inserted to a position where it can be inserted at the stage of this process. The base end insertion portion 32 may be partly protruded from the outer peripheral surface 103a of the joint portion 103 of the other steel pipe 101.
In the present embodiment, the engaging member disposing step S24 and the wedge member inserting step S23 are performed in all the first connecting holes 10 and the second connecting holes 20 and then the engaging member expanding step S24 is performed as the next step. carry out.

  In the engaging member expanding step S24, the wedge member 30 inserted in the wedge member inserting step S23 is further pushed into the insertion hole 40a. Specifically, in this embodiment, the press-fitting machine 200 is used to push into the insertion hole 40a. That is, as shown in FIG. 13, first, a main cylinder 204 (not shown) in the press-fitting machine 200 is driven to move the chuck frame 203 with respect to the main body portion 201, and thereby the axial direction P of the chuck claw 206 of the chuck portion 205. Is adjusted to the position where the wedge member 30 is disposed. If the chuck claws 206 are not directly facing each wedge member 30 in the radial direction Q, a chuck rotation drive unit (not shown) is driven to adjust the position of the chuck claws 206 in the circumferential direction R, and the chuck claws 206 are The wedge members 30 are opposed to each other. In this state, the chuck claw 206 is advanced toward the steel pipe 101 by the cylinder 208, whereby the wedge member 30 can be pushed into the insertion hole 40a by the chuck claw 206 with a force corresponding to the driving force by the cylinder 208. Here, it is desirable to manage the driving force by the cylinder 208 so as to be a preset force in order to push the wedge member 30 with a constant force and generate a restraining force. Further, as shown in FIG. 3, when the wedge member 30 is pushed in, the first restricting portion 43d is provided so that the first restricting portion 43d of the divided body 41 is guided by the outer peripheral surface 103a of the steel pipe 101, and appropriately. The divided body 41 can be moved along the circumferential direction R of the steel pipe 101, and the movement of the divided body 41 together with the wedge member 30 toward the inner peripheral side in the radial direction Q of the steel pipe 101 can be restricted. . In addition, although the force according to the force which pushes the wedge member 30 acts on the outer peripheral surface 103a of the steel pipe 101 from the 1st control part 43d, steel pipe 101 itself becomes a 1st connection hole by receiving the said force with the two steel pipes 101. 10 and the second connecting hole 20 can be prevented from being deformed, and the other steel pipe 101 can be prevented from being deformed differently from one steel pipe 101.

  By pushing the wedge member 30 into the insertion hole 40a in this way, the width dimension B1 of the wedge member 30 increases from the distal end insertion portion 31 toward the proximal end insertion portion 32. Therefore, the insertion hole 40a is expanded and divided. The bodies 41 can be separated from each other, and the engagement surfaces 42 a and 43 a of each divided body 41 can be pressed against the inner peripheral surfaces 10 a and 20 a of the first connection hole 10 and the second connection hole 20. Thereby, the force in the direction along the circumferential direction R of the pile body 100 is applied to the inner circumferential surfaces 10a and 20a of the first coupling hole 10 and the second coupling hole 20 from the divided body 41 of the engagement member 40. The friction force generated by the restraining force acts on each steel pipe 101 as the restraining force in the axial direction P of the pile body 100, and the steel pipes 101 are connected to each other. be able to. Here, in the present embodiment, the engaging surfaces 44a and 43a of the divided body 41 are provided with engaging portions 44, and when the wedge member 30 is pushed in, the engaging portions 44 are elastically deformed, and the sharpened shape is provided. The tip bites into the inner peripheral surfaces 10 a and 20 a of the first connection hole 10 and the second connection hole 20. By the restoring force and the biting in of the engaging portion 44, the engaging relationship between the engaging member 40 and the steel pipe 101 can be reliably maintained, and the restraining force can be generated more effectively.

Next, the press-fitting step S10 is performed again.
That is, as shown in FIG. 15, in the press-fitting machine 200, the chuck part 205 is rotated while gripping the steel pipe 101, and the chuck pipe 203 is moved downward to press-fit the steel pipe 101 while rotating. it can. When the steel pipe 101 is press-fitted for the stroke of the chuck frame 203, the gripping of the steel pipe 101 by the chuck portion 205 is once released. Next, after the chuck part 205 is moved upward, the steel pipe 101 is again gripped by the chuck part 205 and is press-fitted while being rotated. This process is repeated, and when the steel pipe 101 is press-fitted until the upper end 101a of the steel pipe 101 reaches a position that can be gripped by the chuck part 205, the main press-fitting step S10 is completed, and the joint step S20 is performed again.
In this way, the press-fitting step S10 and the joint step S20 are repeated, and when a predetermined number of steel pipes 101 are connected and press-fitted, all steps are completed, and a pile body 100 having a predetermined length is installed on the ground A. Become.

  As described above, in the joint structure 1 and the joint method for a pile constituent member of the present embodiment, the first connection hole 10 and the second connection hole 20 formed in each steel pipe 101 that is the pile constituent member communicate with each other. It is sufficient if it is formed at a possible position, and it is not necessary to have a complicated shape. Further, the insertion hole 40 a into which the wedge member 30 is inserted is a portion surrounded by the divided body 41 and is not directly inserted into the hole formed in the steel pipe 101. For this reason, even if the first connecting hole 10 and the second connecting hole 20 are slightly misaligned, the level difference due to the misalignment does not become the insertion resistance of the wedge member 30, and the wedge member 30 It can be easily inserted and fitted. Moreover, the restraining force for connecting the steel pipes 101 is given by a plurality of divided bodies 41 constituting the engaging member 40 inserted into the first connecting hole 10 and the second connecting hole 20, It is not directly provided by the wedge member 30. For this reason, while being able to insert and push in the wedge member 30 easily, suppressing the influence of the resistance at the time of pushing in, it is a division body in the circumferential direction R orthogonal to the direction which inserts the wedge member 30 with respect to the steel pipe 101. It is possible to exert a restraining force by effectively applying a force by 41. Therefore, it is possible to easily and effectively apply a restraining force to the steel pipe 101 by simply pushing the wedge member 30 without tightening with a bolt. As described above, in the joint structure 1 and the joint method of the pile constituent members of the present embodiment, the steel pipes 101 can be easily connected to each other without performing complicated processing on the steel pipes 101, and the pile structures are connected to each other. The restraining force to restrain can be exhibited effectively. And the pile body 100 can be comprised with the steel pipes 101 connected easily and firmly by such a joint structure 1. FIG.

  In particular, in this embodiment, the engaging portion 44 of the divided body 41 is engaged with the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20, so that the divided body with respect to the steel pipe 101 is obtained. The restraint force can be given more effectively by 41. Further, when the projection 33 of the wedge member 30 is engaged with the divided body 41, the state in which the wedge member 30 is engaged with the divided body 41 is loosened, and the binding force acting on the steel pipe 101 by the divided body 41 is increased. It can prevent more reliably that it falls.

Furthermore, the divided body 41 can be inserted from the first connecting hole 10 and the divided body 41 can be positioned by the first restricting portion 43d. Here, the divided body 41 can be reliably moved in the circumferential direction R by using the outer peripheral surface 103a of the steel pipe 101 with which the first restricting portion 43d is engaged as a guide to exert a restraining force. In addition, the first restriction portion 43d and the second restriction portion 42d are engaged with the outer peripheral surface 103a of the upper steel pipe 101 and the inner peripheral surface 102b of the lower steel pipe 101, so that the divided body is inserted from the first connection hole 10. It is possible to prevent 41 from falling off. Further, by inserting the wedge member 30, the divided body 41 is orthogonal to the axial direction P of the pile body 100 with respect to the inner peripheral surfaces 10 a and 20 a of the first connection hole 10 and the second connection hole 20. A force is applied in the circumferential direction R, which is a direction, to exert a restraining force. For this reason, even if an external force is applied to the pile body 100 constituted by the steel pipe 101 by pressing or drawing in the axial direction P, the steel pipe 101, the engaging member 40, and the wedge member 30 are caused by the deformation caused by the external force. It is possible to prevent the restraint relationship between the steel tube 101 and the restraint force from being reduced.
Moreover, in the joint structure of the pile constituent members of the present embodiment, the joint portion 103 is inserted into the joint portion 103 by making the inner diameter of the joint portion 103 substantially equal to the outer diameter of the steel pipe 101 and inserting the steel pipe 101 into the joint portion 103. The structure which arrange | positions outside the steel pipe 101 and overlaps and connects with the steel pipe 101 inside the steel pipe 101 is not arrange | positioned. For this reason, when the steel pipe 101 is press-fitted, the joint portion does not become a hindrance even when auger excavation inside the steel pipe 101 or various measurements are performed in parallel.
Moreover, in the joint method of the pile structural member of this embodiment, the wedge member 30 is pushed into the insertion hole 40a using the force gripped by the chuck portion 205 of the press-fitting machine 200, so that another wedge member 30 is pushed in. The work relating to the joint can proceed following the press-fitting work without the need for preparing means. Further, by using the force gripped by the chuck portion 205 of the press-fitting machine 200, the force for pushing the wedge member 30 can be stabilized, and the quality of the joint can be improved.

As mentioned above, although the joint structure 1 and the joint method of the pile structural member of 1st embodiment were demonstrated, it is not restricted to this.
In the above description, the joint portion 103 is provided in the upper steel pipe 101, and the lower steel pipe 101 is inserted and connected to the joint portion 103. However, the joint portion 103 is provided in the lower steel pipe 101, and the upper steel pipe 101 is connected to the upper steel pipe 101. The steel pipe 101 may be inserted and connected.
Moreover, although the joint part 103 was previously provided in the steel pipe 101 and the said joint part 103 and the other steel pipe 101 were connected so that it might overlap, it does not restrict to this. For example, as shown in FIG. 16, a tubular joint member may be provided as the joint portion 113 separately from the steel pipe 111, and this may be connected to the steel pipe 101 as a pile constituent member. That is, the upper end portion 111a of the steel pipe 111 that has been press-fitted first is inserted into the lower portion of the joint portion 113, the lower portion of the joint portion 113 is used as the first connection portion, and the lower end portion 111b of the upper steel pipe 111 is used as the second connection portion. You may connect by the joint structure 1 of this embodiment. Furthermore, you may connect by the joint structure 1 of this embodiment by making the upper part of the said joint part 113 into a 1st connection part, and making the upper end part 111a of the lower steel pipe 111 into a 2nd connection part.

  Moreover, as shown in FIG. 17, you may make it a joint part insert in the inside of a steel pipe. That is, as shown in FIG. 17, the steel pipes 116 and 117 and the tubular joint part 118 inserted into the steel pipes 116 and 117 are connected by the joint structure 1 of the present embodiment. The joint portion 118 has an outer diameter substantially equal to the inner diameter of the steel pipes 116 and 117. The upper end portion 118a is inserted into the lower end portion 116a of the upper steel pipe 116, and the lower end portion 118b is inserted into the upper end portion 117a of the lower steel pipe 117, so that the steel pipes 116 and 117 abut each other. Here, in this modification, the 1st connection hole 10 is formed in the lower end part 116a of the steel pipe 116, and the upper end part 117a of the steel pipe 117, respectively, and the lower end part 116a and the upper end part 117a are respectively in the 1st connection part. Equivalent to. Further, the second connecting hole 20 is formed in the upper end portion 118a and the lower end portion 118b of the joint portion 118, and the upper end portion 118a and the lower end portion 118b correspond to the respective first connecting portions. It corresponds to. Thus, by setting it as the structure which inserted the coupling part 118 in the inside of the steel pipes 116 and 117, it can be set as a uniform outer diameter as the whole pile body. In FIG. 17, one of the steel pipes 116, 117 and the joint portion 118 may be joined by welding. In this case, the first connecting hole and the second connecting hole are not necessary at the portion where the one steel pipe welded to the joint 118 and the joint 118 overlap.

As shown in FIG. 18, the other steel pipe 122 is entirely inserted into one steel pipe 121 so that the inner diameter is substantially equal to the outer diameter of the one steel pipe 121, and the end 122a of the other steel pipe 122 is inserted into the first steel pipe 121. It is good also as what connects by the joint structure 1 of this embodiment the edge part 121a of one steel pipe 121 as a 2nd connection part as one connection part.

  Moreover, in the above, although the pile body was made into the steel pipe pile and the pile structural member which comprises this was made into the steel pipe, it is not restricted to this. For example, it can be applied to a steel pipe sheet pile or a C-shaped steel sheet pile. For example, in the case of a steel sheet pile, as shown in FIG. 19 to FIG. 21, as a pile constituent member, a sheet pile material 131 and a joint plate 132 are overlapped, and the overlapped portions are the first connection portion and the second connection portion. You may connect by the joint structure 1 of this embodiment as a connection part. Moreover, in the above, although all were intended for the connection of steel materials, it is not restricted to this, For example, it is applicable also in the connection of a concrete pile material and a joint material as a pile structural member.

  Moreover, in the joint structure 1 of this embodiment, although the engaging member 40 shall be comprised by the two division bodies 41 divided | segmented into the circumferential direction R of the pile body 100, it is not restricted to this. For example, the pile body 100 may be divided in the axial direction P. In this case, the wedge member 30 is also inserted into the insertion hole 40 a in such a direction that the direction in which the width dimension is expanded is the axial direction P of the pile body 100 in accordance with the direction in which the engagement member 40 is divided.

  Moreover, it is good also as what comprises an engaging member by three or more division bodies. FIG. 22 shows a modified joint structure 150. As shown in FIG. 22, the engaging member 160 in the joint structure 150 according to the modified example is divided into three divided bodies 161, 162, and 163 around the central axis C of the first connecting hole 10 and the second connecting hole 20. Has been. The wedge member 170 is formed in a truncated cone shape, and is fitted into a truncated cone-shaped insertion hole 160 a formed by the divided bodies 161, 162, and 163. In other words, the engagement member 160 is divided into the divided body 161 and the divided bodies 162 and 163 in the first direction P1. Further, the engaging member 160 is divided into the divided body 162 and the divided bodies 161 and 163 in the second direction P2 whose direction is changed by 60 degrees from the first direction P1. Further, the engaging member 160 is divided into a divided body 163 and divided bodies 161 and 162 in a third direction P3 whose direction is changed by 60 degrees from the first direction P1 and the second direction P2. Since the wedge member 170 is formed in a truncated cone shape, the width dimension in each of the first direction P1, the second direction P2, and the third direction P3 gradually increases from the distal end toward the proximal end. It has the shape which becomes. Also in the joint structure 150 of such a modification, by pushing the wedge member 170, the divided bodies 161, 162, and 163 are spread in the first direction P1, the second direction P2, and the third direction P3, respectively. The binding force can be generated.

  Moreover, although the some division body which comprises an engaging member was demonstrated as another component, it does not restrict to this. FIG. 23 shows an engaging member 181 in a joint structure 180 according to a modification. As shown in FIG. 23, the engaging member 181 in the joint structure 180 of this modification includes two divided bodies 41 and a connecting portion 182 that connects these divided bodies 41. The connecting portion 182 is formed of a wire material that can be bent and deformed. For this reason, it is possible to arrange the plurality of divided bodies 41 inside the first connecting hole 10 and the second connecting hole 20 by narrowing the space between the divided bodies 41 while bending the connecting portion 182. And the connection part 182 is formed in the length of the grade which is tense by pushing the wedge member 30 in the insertion hole 40a, and pushing apart between the division bodies 41, and it is the grade which fractures | ruptures by pushing further It is strong. By breaking in this way, after pushing in the wedge member 30, a restraining force can be generated with respect to the pile constituting member. In addition, when the divided body 41 is pushed and expanded by the wedge member 30, it may be simply expanded by elastic deformation or plastic deformation without breaking. Even in this case, it suffices if the divided body 41 is expanded and a binding force can be generated on the pile constituent members. As described above, the divided members constituting the engaging member are not limited to completely separated members, and may be partially connected as long as they can be expanded by the wedge member 30 and exert their restraining force. By being partially connected, it becomes easy to handle as one component without the divided bodies becoming discrete.

Moreover, although the 1st connection hole 10 and the 2nd connection hole 20 demonstrated as a circular through-hole, it does not restrict to this. For example, different shapes such as a rectangular hole may be used. In addition, the second connecting hole 20 may be configured to communicate with the first connecting hole 10 serving as a through hole without penetrating the second connecting portion.
Moreover, although the structure of the 1st connection hole which comprises each joint structure, the 2nd connection hole, an engagement member, and a wedge member shall be distribute | arranged to the circumferential direction of a pile material with the predetermined pitch at 1 row. Also, a plurality of them may be arranged in the axial direction. In this case, the pitch in the circumferential direction may be increased. Further, when the configurations of the first connecting hole, the second connecting hole, the engaging member, and the wedge member are arranged at different positions in the axial direction, the circumferential positions are different from each other, so-called staggered You may arrange in.

  In the joint method of the above embodiment, the wedge member 30 is pushed by the press-fitting machine 200 in the engaging member expansion step S24. However, the present invention is not limited to this, and a pushing device different from the press-fitting machine 200 is used. Alternatively, it may be pushed manually with a hammer or the like. Moreover, in the manufacturing method of the pile body of the said embodiment, although the steel pipe 101 was press-fitted with the press-fitting machine 200 and installed in the ground A as press-fit process S10, it is not restricted to this, It installs in the ground A by driving in. Alternatively, it may be built in a previously excavated hole, or a plurality of pile members may be installed in the ground A after being connected in advance with the joint structure of this embodiment.

(Second embodiment)
Next, a second embodiment will be described based on FIG. In the following description, components that are the same as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. As shown in FIG. 24, the pile body 100A of the present embodiment is arranged in the ground F composed of a plurality of layers. The ground F includes a soft layer F1 close to the ground surface Fa, and a strength layer F2 located under the soft layer F1. In the present embodiment, the soft layer F1 is made of sand having a low density and is a ground that may be liquefied during an earthquake. The strength layer F2 has a relatively high ground strength compared to the soft layer F1, and has a ground strength sufficient to exert a restraining force against a lateral displacement with respect to at least the pile body 100A arranged. However, it does not matter whether or not it has a supporting force in the vertical direction. Examples of such a strength layer F2 include a high-density sand layer, a gravel layer, and a consolidated clay layer. In this embodiment, the pile body 100A includes a plurality of joint structures 1, but one of the joint structures 1A is located in the soft layer F1.

  Next, the effect of the pile body 100A of this embodiment is demonstrated. When an earthquake occurs, a periodic vertical load is generated in the pile body 100A. At this time, since the main body portions 102 of the steel pipes 101 connected by the joint structure 1 have a structure of abutment, a compressive load can be reliably transmitted. In addition, the steel pipes 101 are not directly connected to each other by the joint structure 1, but in a state where the main body part 102 of the other steel pipe 101 is inserted into the joint part 103 of one steel pipe 101, It is connected via a connecting portion composed of the engaging member 40. For this reason, the relative relationship in the connection part of the connection part in the connection part comprised from several connection parts, such as the connection part of a connection part and each steel pipe 101, the wedge member 30, and the engagement member 40, is elastically caused by seismic force. The damper effect can be exhibited by changing and exhibiting restoring force. For this reason, when an earthquake force is generated, the vertical stress generated in the pile body 100A can be relaxed.

  Furthermore, when a liquefaction phenomenon occurs in the soft layer F1 during an earthquake, the soil particles constituting the soft layer F1 flow laterally. When laterally flowing, the restraining force against the lateral displacement of the pile body 100A is lost from the soft layer F1, and rather a horizontal force due to lateral flow acts on the pile body 100A. On the other hand, since the liquefaction phenomenon does not occur in the strength layer F2 positioned below the soft layer F1, the pile body 100A receives a restraining force against the lateral displacement from the strength layer F2. For this reason, the pile body 100A is bent and deformed in the soft layer F1, thereby generating a tensile stress. Also in this case, the steel pipes 101 are not directly connected to each other in the range of the soft layer F1 in which the bending deformation occurs, but are connected via the joint structure 1A, so that the connecting part and each steel pipe 101 are connected to each other. As the relative relationship in the connecting portion between the components in the connecting portion constituted by a plurality of components such as the connecting portion, the wedge member 30 and the engaging member 40 is elastically changed, the steel pipe 101 itself is caused by bending deformation. Stress can be relaxed.

  The seismic effect at the time of an earthquake is not limited to the joint structure 1 as described above, but may be a joint structure 150 shown in FIG. 22 or a joint structure 180 shown in FIG. Furthermore, a joint structure 200 as shown in FIG. 25 may be used. In the joint structure 200 of this modification, the diameter of the second connection hole 20 is smaller than the diameter of the first connection hole 10. For this reason, between the inner peripheral surface 10a of the first connecting hole 10 and the inner peripheral surface 20a of the second connecting hole 20, a step portion formed by the outer peripheral surface 102a in the upper end portion 101a of the lower steel pipe 101 is formed. 102c.

  Further, the engaging member 40 is configured by a plurality of divided bodies 201 that are divided in the circumferential direction R and arranged side by side. The divided body 201 is formed in a substantially semicircular shape and is provided with a distal end portion 202 that is disposed in the second connection hole 20 and a proximal end portion that is formed in a substantially semicircular shape and is disposed in the first connection hole 10. 203. The outer diameter of the distal end portion 202 and the outer diameter of the base end portion 203 are dimensions corresponding to the diameters of the corresponding second connecting hole 20 and first connecting hole 10, respectively. Accordingly, the outer diameter of the distal end portion 202 is smaller than the outer diameter of the proximal end portion 203, and the proximal end portion 203 has an inner peripheral surface 10 a of the first connecting hole 10 along the stepped portion 102 c relative to the distal end portion 202. Overhangs.

  Moreover, in this embodiment, although 1 A of joint structures shall be arrange | positioned in the soft layer F1, it does not restrict to this. For example, the joint structure 1A may be disposed at the boundary Fb between the soft layer F1 and the strength layer F2. Furthermore, the joint structure 1A should just be provided in the range which the pile body 100A bends and deforms at the time of the side flow by the liquefaction of the soft layer F1. The bending deformation occurs in the vicinity of the boundary Fb in the soft layer F1 and the strength layer F2. Therefore, the joint structure 1A may be disposed on the strength layer F2 side in the vicinity of the boundary between the soft layer F1 and the strength layer F2. Further, the soft layer F1 is not limited to a layer that liquefies and flows laterally at the time of an earthquake. For example, a peat layer that flows laterally due to landslides at the time of an earthquake may be used. Any layer may be used as long as it has a flowable direction.

According to the above, other inventions represented by the second embodiment can be described as follows.
It is a joint structure of pile constituent members that connect pile constituent members constituting a pile body with each other,
Located in the vicinity of the boundary between the soft layer that may flow laterally at the time of an earthquake, or the strength layer having a high ground strength relative to the soft layer and the soft layer,
A first connecting portion provided on one of the pile constituent members so as to overlap the other pile constituent member, and having a first connection hole penetrating in a direction in which the pile constituent members of each other overlap;
A second connecting portion provided on the other pile component member so as to overlap the first connecting portion, and having a second connecting hole communicating with the first connecting hole;
A coupling portion that is inserted into the first coupling hole and the second coupling hole and fits to each other;
The connecting portion is a joint structure of pile component members constituted by a plurality of components.
Furthermore, in the joint structure,
The connecting portion is a joint structure including the wedge member and the engaging member constituted by the plurality of divided bodies as the component.

  As mentioned above, although embodiment and modification of this invention were explained in full detail with reference to drawings, the concrete structure is not restricted to these embodiment and modification, The design change of the range which does not deviate from the summary of this invention Etc. are also included.

DESCRIPTION OF SYMBOLS 1,150,180 Joint structure 10 1st connection hole 20 2nd connection hole 30,170 Wedge member 31 Front end insertion part 32 Base end insertion part 33 Protrusion part 40,160 Engagement member 40a, 160a Insertion hole 41,161 , 162, 163 Divided body 42 Front end portion 42d Restricting portion 43 Base end portion 44 Engaging portion 100 Pile bodies 101, 111, 121, 122 Steel pipe (pile constituting member)
101a Upper end portion (second connection portion)
102c Step part 103 Joint part (1st connection part)
111a Upper end part (second connection part)
111b Lower end (second connection part)
113 Joint part (pile component, first connection part)
121a Upper end portion (second connection portion)
122a lower end (first connecting portion)
200 Press-fitting machine 205 Chuck part (gripping part)
A Ground P Axial direction Q Radial direction R Circumferential direction P1 First direction P2 Second direction P3 Third direction

Claims (10)

It is a joint structure of pile constituent members that connect pile constituent members constituting a pile body with each other,
A first connecting portion provided on one of the pile constituent members so as to overlap the other pile constituent member, and having a first connection hole penetrating in a direction in which the pile constituent members of each other overlap;
A second connecting portion provided on the other pile component member so as to overlap the first connecting portion, and having a second connecting hole communicating with the first connecting hole;
The width dimension of the base end insertion part on the first connection hole side is inserted into the first connection hole and the second connection hole, and the width dimension of the proximal end insertion part on the first connection hole side with respect to the width dimension of the distal end insertion part on the second connection hole side. A wedge member having a large shape;
A plurality of members that are fitted between the wedge member, the first connecting hole, and the second connecting hole and that are divided in a direction in which the width of the proximal end insertion portion is widened with respect to the distal end insertion portion of the wedge member. An engagement member constituted by a divided body of
The split body is a joint structure of pile constituent members having a first restricting portion that engages with a surface on the opposite side of the surface overlapping the second connecting portion in the first connecting portion. In the joint structure of the pile component according to claim 1,
Said 1st connection hole and said 2nd connection hole are joint structures of the pile structural member currently formed in the substantially identical shape. In the joint structure of the pile component according to claim 1 or 2,
The pile is a pile having an engaging portion that protrudes toward the first connection hole and the second connection hole and engages with inner peripheral surfaces of the first connection hole and the second connection hole. Joint structure of components. In the joint structure of the pile component according to any one of claims 1 to 3,
The said wedge member is a joint structure of the pile structural member which protrudes toward the said division body, and has a projection part engaged with the said division body. In the joint structure of the pile constituent member according to any one of claims 1 to 4,
The second connecting hole passes through the second connecting portion,
The split body is a joint structure of pile constituent members having a second restricting portion that engages with a surface on the opposite side of the surface overlapping the first connecting portion in the second connecting portion. In the joint structure of the pile constituent member according to any one of claims 1 to 5,
The said engaging member is the joint structure of the pile structural member divided | segmented by the some said division body in the direction orthogonal to the axial direction of the said pile body.   A pile body comprising a plurality of pile constituent members connected to each other having the joint structure of pile constituent members according to any one of claims 1 to 6. It is a joint method of pile constituent members that connect pile constituent members constituting a pile body with each other,
A first connecting hole provided penetrating through a first connecting portion provided in one of the pile constituent members, and a second provided in a second connecting portion provided in the other pile constituent member. The pile component member arrangement step of arranging the first connection portion of one of the pile component members and the second connection portion of the other pile component member so as to communicate with each other. When,
A plurality of divided bodies constituting the engaging member are arranged side by side along the inner peripheral surfaces of the first connecting hole and the second connecting hole, so that the first divided body is surrounded by the plurality of divided bodies. The divided member constituting the engaging member is connected to the first connecting hole and the second connecting hole so as to form an insertion hole communicating from the connecting hole to the second connecting hole. An engagement member disposing step of inserting through a hole and engaging a first regulating portion formed in the divided body with a surface of the first connecting portion opposite to a surface overlapping the second connecting portion;
A wedge member having a shape in which the width dimension of the proximal end insertion portion is larger than the width dimension of the distal end insertion portion, and a plurality of the engagement members are arranged in a direction in which the width of the proximal end insertion portion expands with respect to the distal end insertion portion. The wedge member so that the distal end insertion portion is on the second connection hole side and the proximal end insertion portion is on the first connection hole side. A wedge member insertion step of inserting into the insertion hole;
An engagement member expanding step of pushing the wedge member inserted into the insertion hole into the insertion hole and expanding the divided body toward the inner peripheral surface of the first connection hole and the second connection hole; A method for jointing pile constituent members. In the joint method of pile constituent members according to claim 8,
In the engaging member expanding step, the gripping part in the press-fitting machine that grips the peripheral surface of the pile body by the gripping part and press-fits the pile body in the axial direction is a position where the wedge member is inserted into the insertion hole. A method for jointing pile constituent members, wherein the wedge constituent members are pushed into the insertion holes by the gripping portions by gripping the pile constituent members. A press-fitting step of gripping the pile constituent member by a gripping part of a press-fitting machine and press-fitting it into the ground;
The upper end part of the pile constituent member press-fitted in the press-fitting step is the first connection part or the second connection part, and the lower end part of the pile constituent member to be newly connected is the second connection part or the above As a first connection part, by the joint method of pile constituent members according to claim 8 or claim 9, comprising a joint step of connecting the pile constituent members together,
A pile manufacturing method in which the pile body is configured by the plurality of pile constituent members by repeating the press-fitting process a plurality of times while performing the joint process.

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