JP6854699B2 - Joint structure and pile body of pile constituent members, joint method of pile constituent members and manufacturing method of pile body - Google Patents

Description

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

Prefabricated piles may be used for foundation piles of 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 it into the ground, press-fitting it, or by building it in a hole drilled in the ground in advance. 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. There is a limit to the length of the pile material that can be installed in one process due to the manufacturing conditions and transportation conditions of the pile material, the construction conditions at the construction site, and the like. Therefore, by preparing a plurality of pile materials and installing the pile materials while sequentially connecting them with joints, it is possible to install a pile body having a certain length.

As a joint structure for connecting a plurality of pile materials as described above, various types of structures have been proposed.
For example, when the pile material is a steel material such as a steel pipe pile or a steel sheet pile, a welded joint in which the pile materials are welded to each other can be considered. However, since the welded joint depends on the welding work, it takes time to connect the welded joint, and an inspection of the welded portion also occurs, which requires a great deal of time and labor. In addition, since welding work is required at the outdoor construction site where the pile body is installed, it is affected by the weather such as rain and wind, and is also affected by the quality of the skills of the workers who perform the welding work. become. Furthermore, depending on the construction conditions at the construction site, it may not be possible to secure sufficient 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 for engaging with each other are formed in each of the connecting pile materials, and the convex portion of one pile material is made of the other pile material. A structure is disclosed in which the convex portion and the concave portion are fitted and connected by inserting the fitting member into the recess and fitting the fitting member into the gap between the inserted convex portion and the concave portion.

Further, in Patent Document 2, as a joint structure provided in a portion where pile materials are overlapped with each other, each pile material is continuously reduced in diameter with the same inclination in the overlapping direction, and the hole diameter on the side where the pile materials are abutted against each other is reduced. A pair of insertion holes formed in the shape of tapered holes having the same diameter, a movement restraint pin formed on a taper that shrinks in diameter with the same inclination as the pair of insertion holes, and a movement restraint pin that penetrates into the pair of insertion holes. A joint structure including a fixing bolt through a bolt insertion hole formed in the center of a pin and a reinforcing member welded and fixed to an inner pile material and the fixing bolt is screwed is disclosed. ..

Japanese Unexamined Patent Publication No. 2015-7338 Japanese Unexamined Patent Publication No. 2013-227809

However, the technique described in Patent Document 1 has a problem that it is necessary to provide the pile constituent members themselves constituting the pile body with complicated shapes such as concave portions and convex portions for engaging with each other.
Further, even in the technique described in Patent Document 2, it is necessary to form a pair of insertion holes for inserting the movement restraint prevention pin in the pile constituent member itself constituting the pile body in a tapered hole shape. There was a problem that the processing to itself became complicated. Further, in the technique described in Patent Document 2, the pile constituent members are engaged with each other by inserting and fitting the tapered movement restraining prevention pin into the pair of insertion holes. In such a structure, if the insertion holes formed in each of the pile constituent members are displaced, it becomes a resistance when the movement restraining prevention pin is inserted and fitted. When such resistance occurs, there is a problem that the movement restraint prevention pin cannot be sufficiently inserted, or even if it can be sufficiently inserted, a large pushing force is required for the insertion work. Further, even if the movement restraint prevention 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, so that the pile constituent members are restrained from each other. There is a problem that the force cannot be sufficiently exerted as a force in the direction orthogonal to the acting insertion direction. Further, in the technique described in Patent Document 2, such a pushing force is generated by tightening bolts, and it takes time to place bolts in each joint portion, temporarily tighten them, and then tighten them with a torque wrench or the like. It was a laborious task.

Therefore, the present invention has been made in view of the above-mentioned circumstances, and it is possible to easily connect the pile constituent members without performing complicated processing, and a binding force for restraining the pile constituents with each other. It is an object of the present invention to provide a joint structure and a pile body of a pile constituent member, a joint method of the pile constituent member, and a method of manufacturing the pile body, which can effectively exert the above.

In order to solve the above problems, the present invention employs the following means.
That is, the joint structure of the pile constituent members according to one aspect of the present invention is a joint structure of the pile constituent members that connect the pile constituent members constituting the pile body in an overlapping manner with each other, and is attached to one of the pile constituent members. A first connecting portion provided so as to overlap the other pile constituent member and having a first connecting hole having a first connecting hole penetrating the pile constituent members in the overlapping direction, and the first connection to the other pile constituent member. A second connecting portion that is provided so as to overlap the portion and has a second connecting hole that communicates with the first connecting hole, and is inserted into the first connecting hole and the second connecting hole, and the first A wedge member having a shape in which the width dimension of the base end insertion portion on the first connecting hole side is larger than the width dimension of the tip insertion portion on the second connecting hole side, the wedge member and the first connecting hole, and the first connecting hole. An engaging member formed of a plurality of divided bodies that are fitted between the second connecting holes and are divided in a direction in which the width of the base end insertion portion is widened with respect to the tip insertion portion of the wedge member. The split body has a first regulating portion that engages with a surface of the first connecting portion that overlaps the second connecting portion and is opposite to the surface that overlaps with the second connecting portion.

According to this configuration, the joint structure can be constructed as follows.
That is, one pile component including the first connecting portion in which the first connecting hole is formed and the other constituent member including the second connecting portion in which the second connecting hole is formed are first. The first connecting portion and the second connecting portion are arranged so as to be overlapped with each other so that the connecting hole of the above and the second connecting hole communicate with each other. Next, a plurality of divided bodies constituting the engaging member are arranged in the first connecting hole and the second connecting hole, and further, the wedge member is formed of the wedge member and the first connecting hole and the second connecting hole. Insert so that each of the plurality of divided bodies is arranged between the inner peripheral surface, and the first regulating portion formed in the divided body is opposite to the surface overlapping the second connecting portion in the first connecting portion. Engage with the side surface. At this time, the direction in which the divided body is divided is such that the width dimension of the base end insertion portion on the first connecting hole side greatly expands with respect to the width dimension of the tip insertion portion on the second connecting hole side of the wedge member. Adjust the orientation of the wedge member and the position of the split body so that they 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 distance between each other in the direction in which the width of the wedge member is widened, that is, in the direction in which the engaging member is divided. .. At this time, when the wedge member is pushed in, a force acts in the direction in which the wedge member is also pushed in, but the first regulating portion engages with the surface of the first connecting portion that overlaps with the second connecting portion on the opposite side. By doing so, it is possible to prevent the split body from moving together with the wedge member. As a result, the split body presses against the inner peripheral surfaces of the first connecting hole and the second connecting hole to generate a binding force, and the one pile constituent member in which the first connecting hole is formed and the second connecting hole. Can be connected to the other pile constituent member on which the is formed.
Here, the first connecting hole and the second connecting hole formed in the pile constituent member need only be formed at positions where they can communicate with each other, and do not need to have a complicated shape. Further, the hole for inserting the wedge member is a portion surrounded by the divided body, and is not directly inserted into the hole formed in the pile constituent member. Therefore, even if there is a slight misalignment between the first connecting hole and the second connecting hole, the wedge member can be easily inserted without the step difference due to the misalignment becoming the insertion resistance of the wedge member. Can be fitted together. Further, the binding force for connecting the pile constituent members is given by the plurality of divided bodies constituting the engaging member inserted into the first connecting hole and the second connecting hole, and the wedge member provides the binding force. It is not given directly. Therefore, the wedge member can be easily inserted and pushed in, and the split body is effective in the direction orthogonal to the direction in which the wedge member is inserted with respect to the pile constituent member while suppressing the influence of the resistance at the time of pushing. It is possible to exert a binding force by exerting a force on the. Therefore, it is possible to easily and effectively apply a binding force to the pile constituent members simply by pushing the wedge member without tightening with bolts.

Further, in the joint structure of the pile constituent member according to one aspect of the present invention, the first connecting hole and the second connecting hole may be formed in substantially the same shape.

According to this configuration, the first connecting hole and the second connecting hole are formed in substantially the same shape. Therefore, the first connecting hole and the second connecting hole that communicate with each other can be easily formed by drilling the pile constituent members that are overlapped with each other in a stacked state. Further, it is possible to prevent a step from being formed between the inner peripheral surfaces of the first connecting hole and the second connecting hole so that the step causes friction and the like so that the divided bodies widen the distance between each other. There is no risk of hindering movement.

Further, in the joint structure of the pile constituent member according to one aspect of the present invention, the split body protrudes toward the first connecting hole and the second connecting hole, and the first connecting hole and the first connecting hole. It may have an engaging portion that engages with the inner peripheral surface of the second connecting hole.

According to this configuration, the engaging portion of the split body engages with the inner peripheral surfaces of the first connecting hole and the second connecting hole, so that the split body more effectively binds the pile constituent members. Can be given.

Further, in the joint structure of the pile constituent member according to one aspect of the present invention, the wedge member may have a protrusion that protrudes toward the divided body and engages with the divided body.

According to this configuration, when the protrusion of the wedge member engages with the split body, the state in which the wedge member is fitted to the split body is loosened, and the binding force acting on the pile component by the split body is reduced. It is possible to prevent this from happening more reliably.

Further, in the joint structure of the pile constituent member according to one aspect of the present invention, the second connecting hole penetrates the second connecting portion, and the divided body is in the second connecting portion. It may have a second regulating portion that engages with a surface opposite to the surface overlapping the first connecting portion.

According to this configuration, the split body inserted from the first connecting hole falls off by engaging the second regulating portion with the surface of the second connecting portion opposite to the surface overlapping the first connecting portion. It is possible to prevent it from being lost.

Further, in the joint structure of the pile constituent member according to one aspect of the present invention, the engaging member may be divided by a plurality of the divided bodies in a direction orthogonal to the axial direction of the pile body.

According to this configuration, by inserting the wedge member, the split body exerts a force on the inner peripheral surfaces of the first connecting hole and the second connecting hole in the direction orthogonal to the axial direction of the pile body. It will be made to exert a binding force. Therefore, even if an external force acts in the axial direction by driving, press-fitting, or pulling out the pile body composed of the pile constituent members, the pile constituent member, the engaging member, and the wedge member are caused by the deformation due to the external force. It is possible to prevent the restraining relationship of the pile from being loosened and the binding force on the pile constituent members from being lowered.

Further, the pile body according to one aspect of the present invention includes a plurality of pile constituent members having a joint structure of the pile constituent members and connected to each other.

According to this configuration, the pile body can be formed by the pile constituent members that are easily and firmly connected by the joint structure of the pile constituent members.

Further, the method of joining the pile constituent members according to one aspect of the present invention is a method of joining the pile constituent members that connect the pile constituent members constituting the pile body so as to overlap each other, and the one said pile constituent member. The first connecting hole provided through the first connecting portion provided and the second connecting hole provided in the second connecting portion provided on the other pile constituent member communicate with each other. The 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 pile constituent member so as to overlap each other, and the engaging member are configured. By arranging the plurality of divided bodies side by side along the inner peripheral surfaces of the first connecting hole and the second connecting hole, the plurality of divided bodies are surrounded by the plurality of divided bodies and the first connecting hole is surrounded by the first connecting hole. The split body constituting the engaging member is inserted into the first connecting hole and the second connecting hole from the first connecting hole so as to form an insertion hole communicating with the second connecting hole. , The engaging member arranging step of engaging the first regulating portion formed in the divided body with the surface of the first connecting portion on the side opposite to the surface overlapping the second connecting portion, and the width of the tip insertion portion. A wedge member having a shape in which the width dimension of the base end insertion portion is larger than the dimension, the width of the base end insertion portion is widened with respect to the tip insertion portion, and the engaging member is formed by the plurality of divided bodies. The wedge member is inserted into the insertion hole so that the tip insertion portion is on the second connecting hole side and the base end insertion portion is on the first connecting hole side in the direction of division. In the wedge member insertion step, the wedge member inserted into the insertion hole is pushed into the insertion hole, and the divided body is pushed toward the inner peripheral surfaces of the first connecting hole and the second connecting hole. It includes an engaging member expansion step to expand.

According to this method, the joint structure can be constructed as follows.
That is, as a pile constituent member arranging step, one pile constituent member including the first connecting portion in which the first connecting hole is formed and the other provided with the second connecting portion in which the second connecting hole is formed. The constituent members are arranged so that the first connecting hole and the second connecting hole communicate with each other, and the first connecting portion and the second connecting portion are overlapped with each other. Next, as an engaging member arranging step, a plurality of divided bodies constituting the engaging member are arranged in the first connecting hole and the second connecting hole along the inner peripheral surface. Next, as a wedge member insertion step, the wedge member is divided so that each of the plurality of divided bodies is arranged between the wedge member and the inner peripheral surfaces of the first connecting hole and the second connecting hole. It is inserted into the insertion hole formed by. At this time, the direction in which the divided body is divided matches the direction in which the width dimension of the base end insertion portion on the first connecting hole side greatly expands with respect to the width dimension of the tip insertion portion on the second connecting hole side of the wedge member. As described above, the direction of the wedge member and the position of the divided body are adjusted. Then, as an engaging member expansion step, by further pushing the wedge member in this state, the plurality of divided bodies constituting the engaging member are further divided in the direction in which the width of the wedge member is widened, that is, in the direction in which the engaging member is divided. Move to widen the distance between each other. At this time, when the wedge member is pushed in, a force acts in the direction in which the wedge member is also pushed in, but the first regulating portion engages with the surface of the first connecting portion that overlaps with the second connecting portion on the opposite side. By doing so, it is possible to prevent the split body from moving together with the wedge member. As a result, the split body presses the inner peripheral surfaces of the first connecting hole and the second connecting hole to generate a binding force, and the one pile constituent member in which the first connecting hole is formed and the second connecting hole. Can be connected to the other pile constituent member on which the is formed.
Here, the first connecting hole and the second connecting hole formed in the pile constituent member need only be formed at positions where they can communicate with each other, and do not need to have a complicated shape. Further, the hole for inserting the wedge member is a portion surrounded by the divided body, and the wedge member is not directly inserted into the hole formed in the pile constituent member. Therefore, even if there is a slight misalignment between the first connecting hole and the second connecting hole, the wedge member can be easily inserted without the step difference due to the misalignment becoming the insertion resistance of the wedge member. Can be fitted together. Further, the binding force for connecting the pile constituent members is given by the plurality of divided bodies constituting the engaging member inserted into the first connecting hole and the second connecting hole, and the wedge member provides the binding force. It is not given directly. Therefore, the wedge member can be easily inserted and pushed in, and the split body is effective in the direction orthogonal to the direction in which the wedge member is inserted with respect to the pile constituent member while suppressing the influence of the resistance at the time of pushing. It is possible to exert a binding force by exerting a force on the. Therefore, it is possible to easily and effectively apply a binding force to the pile constituent members simply by pushing the wedge member without tightening with bolts.

Further, in the method of joining the pile constituent members according to one aspect of the present invention, in the engaging member expansion step, in the press-fitting machine in which the peripheral surface of the pile body is gripped by the gripping portion and the pile body is press-fitted in the axial direction. The grip portion may push the wedge member into the insertion hole by gripping the pile constituent member at a position where the wedge member is inserted into the insertion hole.

According to this method, by pushing the wedge member into the insertion hole by using the force gripped by the grip portion of the press-fitting machine, it is not necessary to prepare another means for pushing the wedge member, and the joint is joined after the press-fitting operation. Can proceed with the work related to. Further, by utilizing the force gripped by the gripping portion of the press-fitting machine, the force for pushing the wedge member can be stabilized, and the quality of the joint can be improved.

Further, the method for manufacturing a pile body according to one aspect of the present invention includes a press-fitting step in which the pile constituent member is gripped by a gripping portion of the press-fitting machine and press-fitted into the ground, and the pile constituent member press-fitted in the press-fitting step. The upper end portion is used as the first connecting portion or the second connecting portion, and the lower end portion of the newly connected pile constituent member is used as the second connecting portion or the first connecting portion of the pile constituent member. The joint method includes a joint process for connecting the pile constituent members to each other, and the press-fitting process is repeated a plurality of times while performing the joint process to form the pile body with the plurality of pile constituent members.

According to this method, by carrying out the press-fitting process and the joint process, it is possible to easily and firmly manufacture a pile body composed of a plurality of pile constituent members.

According to the present invention, it is possible to easily connect the pile constituent members to each other without performing complicated processing on the pile constituent members, and it is possible to effectively exert a binding force for restraining the pile constituent members. it can.

It is a schematic diagram which shows the pile body of the 1st Embodiment of this invention. It is a side view which shows the joint structure of the 1st Embodiment of this invention. FIG. 2 is a cross-sectional view taken along the cutting line I-I in FIG. It is sectional drawing which was broken at the cutting line II-II in FIG. It is a front view which shows the joint structure of the 1st Embodiment of this invention. It is a side view which shows the 2nd connection part in the joint structure of 1st Embodiment of this invention. It is a side view which shows the 1st connection part in the joint structure of 1st Embodiment of this invention. It is a perspective view which shows the wedge member in the joint structure of 1st Embodiment of this invention. It is explanatory drawing which shows the press-fitting process in the joint method of 1st Embodiment of this invention. It is sectional drawing which showed the gripping state of the steel pipe in the press-fitting process in the joint method of 1st Embodiment of this invention, and was cut at the cut surface III-III in FIG. It is explanatory drawing which shows the pile constituent member arrangement process in the joint method of 1st Embodiment of this invention. It is explanatory drawing which shows the pile constituent member arrangement process, the engagement member arrangement process, and the wedge member insertion process in the joint method of 1st Embodiment of this invention. It is explanatory drawing which shows the engaging member expansion process in the joint method of 1st Embodiment of this invention. FIG. 5 is a cross-sectional view taken along the cut surface IV-IV in FIG. 13 showing a gripping state of a steel pipe in the engaging member expansion step in the joint method of the first embodiment of the present invention. It is explanatory drawing which shows the press-fitting 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 in 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 the 2nd Embodiment. FIG. 5 is a cross-sectional view taken along the cutting line I-I shown in FIG. 2 in the joint structure of the modified example of the second embodiment. FIG. 5 is a cross-sectional view taken along the cutting line II-II shown in FIG. 2 in the joint structure of the modified example of the second embodiment. It is a front view which shows the joint structure of the modification of the 2nd Embodiment.

(First Embodiment)
Hereinafter, the first embodiment according to the present invention will be described with reference to FIGS. 1 to 15.
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 piles are arranged in the ground A at a predetermined pitch so that the upper end portion 100a protrudes to the above-ground portion. Each pile body 100 is configured by connecting a plurality of steel pipes 101, which are pile constituent members, in an axial direction P which is a direction along the axis L100 of the pile body 100. The steel pipe 101 has a tubular main body 102 and a tubular joint 103 connected to one end of the main body 102 at the lower end and having an inner diameter substantially equal to the outer diameter of the main body 102. Then, as shown in FIG. 2, in the joint portion 103 of the steel pipe 101, the upper end portion 101a of the lower steel pipe 101 arranged below the steel pipe 101 is inserted as the second connecting portion as the first connecting portion. , It is overlapped in the radial direction Q which is the direction orthogonal to the axial direction P of the pile body 100. The joint portion 103 of one steel pipe 101 arranged above and the upper end portion 101a of the other steel pipe 101 arranged below the steel pipe 101 are connected by the joint structure 1 of the present embodiment. Further, in the present embodiment, the main body portion 102 and the joint portion 103 of the steel pipe 101 are joined by a welded portion 104 in which they are welded to each other. As shown in FIG. 1, since the steel pipe 101 located at the lowermost portion is not arranged below the steel pipe 101, the joint portion 103 is not provided at the lower end of the main body portion 102.

Next, the details of the joint structure 1 of the present embodiment will be described.
As shown in FIGS. 2 to 7, the joint structure 1 of the present embodiment has a joint portion 103 having a first connecting hole 10 and provided in the upper steel pipe 101 and a second connecting hole 20 and is downward. The upper end portion 101a provided in the steel pipe 101 of the above steel pipe 101 and inserted into the joint portion 103 of the upper steel pipe 101, the wedge member 30 inserted into the first connecting hole 10 and the second connecting hole 20, and the wedge member 30. It includes an engaging member 40 fitted between the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20.
The upper end portion 101a of the lower steel pipe 101 is inserted into the joint portion 103 of the upper steel pipe 101, so that the upper end portion 101a overlaps the joint portion 103 in the radial direction Q, which is a direction orthogonal to the axial direction P of the pile body 100. .. The joint portion 103 has a first connecting hole 10 penetrating in the radial direction Q. In the present embodiment, a plurality of first connecting holes 10 are formed at substantially the center of the joint portion 103 in the axial direction P and at equal intervals in the circumferential direction R. Each of the first connecting holes 10 is formed in a circle with substantially the same diameter from the outer peripheral surface 103a to the inner peripheral surface 103b of the joint portion 103.

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

Further, as shown in FIGS. 3, 4 and 8, the wedge member 30 has a tip insertion portion 31 inserted into the second connecting hole 20 and radial directions of both steel pipes 101 and 101 with respect to the tip insertion portion 31. It has a base end insertion portion 32 arranged at a position on the outer peripheral side of the Q and inserted into the first connecting hole 10. The wedge member 30 is formed in a tapered shape in which the width dimension B1 along the circumferential direction R of the pile body 100 gradually increases from the tip on 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 tip insertion portion 31. In the wedge member 30, the side surface 30a forming the tapered shape on both sides of the circumferential direction R has a protrusion 33 protruding 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. Further, each of the protrusions 33 is inclined and sharply protrudes from the side surface 30a toward the outside along the circumferential direction R from the inner peripheral side of the radial direction Q to the outer peripheral side. On the other hand, in the present embodiment, in the wedge member 30, the end faces 30b on both sides in the axial direction P of the pile body 100 have an arc shape along the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20. The width dimension B2 of the wedge member 30 formed and along the axial direction P is substantially equal to the diameters of the inner peripheral surfaces 10a and 20a.

The engaging member 40 is composed of a plurality of divided bodies 41. The divided bodies 41 are divided and arranged side by side along the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20 in the circumferential direction R in which the width of the wedge member 30 is widened. .. In this embodiment, the number of divided bodies 41 is two. Each of the divided bodies 41 has a tip portion 42 formed in a substantially semicircular shape and arranged in the second connecting hole 20, and a base end formed in a substantially semicircular shape and arranged in the first connecting hole 10. It has a part 43.

The tip portion 42 has an engaging surface 42a along the inner peripheral surface 20a of the second connecting hole 20 and an inserted surface 42b arranged on the central axis C side of the second connecting hole 20 with respect to the engaging surface 42a. And have. The engaging surface 42a is formed in an arc shape when viewed in the direction of the central axis C of the first connecting hole 10 and the second connecting hole 20. Further, the inserted surface 42b is arranged substantially parallel to the axial direction P of the pile body 100 so as to form a string with respect to the arc-shaped engaging surface 42a when viewed in the direction of the central axis C.

The base end portion 43 has an engaging surface 43a along the inner peripheral surface 10a of the first connecting hole 10 and an inserted surface arranged on the central axis C side of the first connecting hole 10 with respect to the engaging surface 43a. It has 43b and. Like the tip portion 42, the engaging surface 43a is formed in an arc shape when viewed in the direction of the central axis C of the first connecting hole 10 and the second connecting hole 20. Further, the inserted surface 43b is arranged substantially parallel to the axial direction P of the pile body 100 so as to form a string with respect to the arc-shaped engaging surface 43a when viewed in the direction of the central axis C.

Here, the maximum separation dimension from the inserted surfaces 42b, 43b to the engaging surfaces 42a, 43a, that is, the circumferential direction R of the pile body 100 at the position of the central axis C of the first connecting hole 10 and the second connecting hole 20. The width dimension B3 along the above is smaller than the radius of the first connecting hole 10 and the second connecting hole 20.

The inserted surfaces 42b and 43b of the tip end portion 42 and the base end portion 43 are first connected along the circumferential direction R of the pile body 100 from the radial Q inner peripheral side to the outer peripheral side of the pile body 100, respectively. The engaging surfaces 42a and 43a are inclined from the central axis C of the hole 10 and the second connecting hole 20 toward the opposite inner peripheral surfaces 10a and 20a, and are continuous with each other. Further, the engaging surfaces 42a and 43a of the tip end portion 42 and the base end portion 43 are also continuous with each other. The two divided bodies 41 are arranged so that the inserted surfaces 42b and 43b of the tip end portion 42 and the base end portion 43 face each other. As a result, the insertion holes 40a in which the width dimension along the circumferential direction R of the pile body 100 increases from the radial Q inner peripheral side to the outer peripheral side of the pile body 100 due to the inserted surfaces 42b and 43b of the two divided bodies 41. Is formed.

The engaging surfaces 42a and 43a of the divided bodies 41 are provided with engaging portions 44 projecting toward the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20. The engaging portion 44 extends linearly along the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20, and protrudes sharply. In the present embodiment, the tip of the engaging portion 44 bites into the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20 in a state of being elastically compressed and deformed, and the inner peripheral surfaces 10a and 20a are formed. Is pressing. The engaging portion 44 may be in a plastically deformed state.

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 end portion is located in the radial direction of the first connecting hole 10 and the second connecting hole 20. A first regulation portion 43d is provided so as to project in a flange shape toward the outer peripheral side of the pile body 100 in the circumferential direction R). The first regulating portion 43d is engaged with the outer peripheral surface 103a on the opposite side of the inner peripheral surface 103b, which is the surface of the upper steel pipe 101 that overlaps with the lower steel pipe 101, and the divided body 41 is engaged with the radial Q of the pile body 100. It regulates movement to the inner circumference side. Here, in the present embodiment, on the outer peripheral surface 103a of the upper steel pipe 101, the peripheral edge portion 103d of the first connecting hole 10 with which the first regulating portion 43d is engaged is planar corresponding to the first regulating portion 43d. Is formed in. Further, the tip portion 42 of the split body 41 slightly protrudes from the inner peripheral surface 102b of the lower steel pipe 101, and the protruding tip thereof is in the radial direction of the first connecting hole 10 and the second connecting hole 20. A second regulating portion 42d is provided so as to project to the outer peripheral side in a flange shape. The second regulating portion 42d is engaged with the inner peripheral surface 102b on the opposite side of the outer peripheral surface 102a, which is the surface of the lower steel pipe 101 that overlaps with the upper steel pipe 101, and the divided body 41 is engaged with the radial Q of the pile body 100. It regulates the movement to the outer peripheral side.

Next, a joint method for connecting the steel pipes 101 to each other by the joint structure 1 as described above will be described by including the method for manufacturing the pile body 100 formed by connecting the steel pipes 101.
FIG. 9 shows a state in which a plurality of pile bodies 100 are already installed on the ground A and the next pile body 100 is installed. Installation of the pile body 100 on the ground A is performed by carrying out the press-fitting step S10 and the joint step S20 that constitute the manufacturing method of 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-fitted 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 form the joint structure 1 of the present embodiment, and the joint portion 103 is the first. It is pre-processed so that it has a first connecting hole 10 as a connecting portion and an upper end portion 101a has a second connecting hole 20 as a second connecting portion. As described above, the lowermost steel pipe 101 does not have a joint portion 103.

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 has a main body 201, a support portion 202 provided on the main body 201 for gripping a reaction force receiver generated at the time of press-fitting, and an axial direction with respect to the main body 201. A chuck frame 203 provided so as to be movable in the press-fitting direction M of the pile body 100 to be P is provided. The support portion 202 has a foundation grip portion 202a that can be fitted and detached from the inner peripheral surface of the steel pipe 101 by being brought close to or separated from each other. In this embodiment, the three steel pipes 101 are provided with three foundation grip portions 202a so that they can receive reaction forces. In FIG. 9, three steel pipes 101 that have already been installed are used as reaction force receivers, but if the required number of reaction force receivers is not installed, reaction force receivers corresponding to the steel pipes 101 are installed in advance. It is gripped by the support portion 202. The support portion 202 is provided so as to be movable with respect to the main body portion 201 in the direction N intersecting the press-fitting direction M. The main body 201 is provided with a basic movement drive unit (not shown) for moving the support unit 202. Therefore, by moving the support portion 202 relative to the main body portion 201 by a foundation moving drive portion (not shown) while holding the steel pipe 101 that receives the reaction force, the main body portion 201 is mounted on the installed steel pipe 101. It is possible to move and press-fit the steel pipe 101 into the new installation position S. The foundation grip portion 202a may be provided to such an extent that it 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 grips 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 for advancing and retreating the chuck claws 206 toward the steel pipe 101 to be press-fitted. The press-fitted steel pipe 101 is inserted inside the array of chuck claws 206 arranged in an annular shape. The chuck claw 206 has a gripping surface 206a formed to have a curvature corresponding to the curvature of the outer peripheral surface of the steel pipe 101 to be press-fitted. Then, by advancing the chuck claw 206 by the driving force of the cylinder 208, the gripping surface 206a can be pressed against the outer peripheral surface of the steel pipe 101 with a desired pressure to grip the steel pipe 101, and the chuck claw 206 can be gripped. By retracting the steel pipe 101, it is possible to release the gripped state.

The chuck frame 203 is provided with a chuck rotation drive unit (not shown) for rotating the chuck portion 205 around the axis L100 of the steel pipe 101 for press-fitting. Therefore, if the chuck rotation drive 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 around the axis L100 while being rotated in the press-fitting direction M with respect to the ground A. It is possible to push in (that is, press fit) or pull out.

As shown in FIG. 9, the steel pipe 101 is press-fitted by such a press-fitting machine 200. Then, when the press-fitting of the steel pipe 101 is completed to a position where the upper end portion 101a of the steel pipe 101 can be gripped by the chuck portion 205, the joint step S20 by the joint method in the present embodiment is performed as the next step.
The joint step S20 includes a pile component arranging step S21 in which another steel pipe 101 connected to the steel pipe 101 is superposed on the steel pipe 101 press-fitted in the previous step, and the first connecting hole 10 and the second connecting. An engaging member arranging step S22 for inserting the engaging member 40 into the hole 20, a wedge member inserting step S23 for inserting the wedge member 30 into the insertion hole 40a formed by the split body 41 constituting the engaging member 40, and a wedge. It is provided with an engaging member expanding step S24 in which the split body 41 constituting the engaging member 40 is expanded 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 to move the chuck portion 205 to a position separated upward from the press-fitted steel pipe 101. Next, as shown in FIG. 11, another steel pipe 101 newly connected by a crane or the like (not shown) is suspended and lowered from above the chuck frame 203 to insert the other steel pipe 101 into the chuck portion 205. Then, the chuck claw 206 of the press-fitting machine 200 is advanced to the other steel pipe 101 inserted into the chuck portion 205 to grip the other steel pipe 101. Next, as shown in FIG. 12, in the press-fitting machine 200, the chuck frame 203 is lowered with respect to the main body portion 201 to lower the other steel pipe 101 gripped by the chuck portion 205, and the steel pipe 101 press-fitted by this is lowered. The upper end portion 101a of the steel pipe 101 is inserted into the joint portion 103 of another steel pipe 101. Here, by grasping the other steel pipe 101 to be connected by using the press-fitting machine 200, the already press-fitted steel pipe 101 can be aligned with the axis L100 of the other steel pipe 101 to be connected, and the press-fitted steel pipe 101 can be matched. The upper end portion 101a of the steel pipe 101 can be easily inserted into the joint portion 103 of another steel pipe 101.

Next, in FIG. 12, the chuck portion 205 is rotated with respect to the chuck frame 203 in the press-fitting machine 200 to adjust the position of the other connected steel pipe 101 around the axis L100 with respect to the press-fitted steel pipe 101. .. As a result, the second connecting hole 20 formed in the press-fitted steel pipe 101 and the first connecting hole 10 of the other steel pipe 101 to be connected can be communicated with each other so that the central axes C coincide with each other. it can. At this time, the center axis C of the second connecting hole 20 and the first connecting hole 10 may be guided to coincide with each other by a key structure or the like.
The steel pipe 101 may not be provided with the first connecting hole 10 and the second connecting hole 20 in advance. Then, in this step, after inserting the upper end portion 101a of one steel pipe 101 into the joint portion 103 of the other steel pipe 101, the first connecting hole 10 and the second connecting hole 20 pass through both steel pipes 101. 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. At the same time, it is possible to prevent a step from being generated between the first connecting hole 10 and the second connecting hole 20. Further, in the above, the position adjustment of the other steel pipe 101 to be connected to the press-fitted steel pipe 101 is performed by using the press-fitting machine 200, but the present invention is not limited to this, and the suspended other steel pipe 101 is manually adjusted. You may also adjust the position.

Next, the engaging member arrangement step S22 is carried out.
In the engaging member arranging step S22, first, in the state shown in FIG. 12, the split body 41 constituting the engaging member 40 is first engaged with the outer peripheral surface 103a of the upper steel pipe 101 until the first regulating portion 43d can engage with the outer peripheral surface 103a of the steel pipe 101. It is inserted into one connecting hole 10 and a second connecting hole 20. Here, as shown in FIG. 5, in the present embodiment, the two divided bodies 41 are arranged side by side in the circumferential direction R orthogonal to the axial direction P of the connecting steel pipe 101. The tip portion 42 of each split body 41 is arranged in the second connecting hole 20, the base end portion 43 is arranged in the first connecting hole 10, and an insertion hole 40a is formed between the two split bodies 41. To. Here, since the engaging member 40 is configured such that the insertion holes 40a are formed between the two divided bodies 41, the width of the insertion holes 40a should be smaller than the planned width dimension. By inserting it, it can be easily inserted without interfering with the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20. As described above, the base end portion 43 of the split body 41 has the first regulation portion 43d. Therefore, it is possible to engage the first regulating portion 43d with the outer peripheral surface 103a of the steel pipe 101 with the divided body 41 inserted into the first connecting hole 10 and the second connecting hole 20. As a result, the split body 41 constituting the engaging member 40 can be positioned and reliably inserted by an appropriate amount, and the split body 41 is displaced toward the radial Q inner peripheral side of the pile body 100. It can also be prevented. Then, in the inserted state, the engaging surfaces 42a and 43a of the tip 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 connecting hole 10 and the second connecting hole 20. Let me. As a result, the first regulating portion 43d is engaged with the outer peripheral surface 103a of the upper steel pipe 101, the second regulating portion 42d is further engaged with the inner peripheral surface 102b of the lower steel pipe 101, and the inserted split body 41 is piled up. It is possible to prevent the body 100 from being displaced toward the inner peripheral side and the outer peripheral side in the radial direction Q.

Further, as shown in FIG. 3, the engaging member 40 is divided into two divided bodies 41, and since there is a gap between the divided bodies 41, the pile body 100 circumferences of the entire engaging member 40 The width dimension along the direction R can be adjusted. Therefore, in the pile component arranging step S21, the central axis C of the first connecting hole 10 and the second connecting hole 20 is displaced due to a construction error, or the first connecting hole 10 or the second connecting hole 20 Even if the diameter of the pile body 100 deviates from a predetermined dimension and the relative positions of the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20 deviate from each other in the circumferential direction R of the pile body 100, they are engaged. The divided body 41 of the member 40 can be easily inserted into the first connecting hole 10 and the second connecting hole 20.

Next, the wedge member insertion step S23 is carried out.
That is, the wedge member 30 is inserted into the insertion hole 40a formed between the divided bodies 41 in the engaging member arranging step S22 in order from the tip insertion portion 31 from the radial Q outer peripheral side 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 engaging member 40 is divided by the divided body 41. Here, the width dimension of the insertion hole 40a differs depending on the position and diameter of the first connecting hole 10 and the second connecting hole 20, but at the stage of this step, the wedge member 30 is inserted to a position where it can be inserted. It suffices if it is made, and a part of the base end insertion portion 32 is in a state of protruding from the outer peripheral surface 103a of the joint portion 103 of the other steel pipe 101.
In the present embodiment, the engaging member arranging step S22 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 in the next step is performed. carry out.

In the engagement member expansion step S24, the wedge member 30 inserted in the wedge member insertion step S23 is further pushed into the insertion hole 40a. Specifically, in the present embodiment, the press-fitting machine 200 is used to push the insert into the insertion hole 40a. That is, as shown in FIG. 13, first, the 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, whereby 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 arranged. When the chuck claw 206 does not face 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 claw 206 in the circumferential direction R, and the chuck claw 206 is moved. Face each wedge member 30. In this state, by advancing the chuck claw 206 toward the steel pipe 101 by the cylinder 208, 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 of the cylinder 208. Here, it is desirable to manage the driving force of the cylinder 208 so as to be a preset force in order to push the wedge member 30 with a constant force to generate a binding force. Further, as shown in FIG. 3, when the wedge member 30 is pushed in, the first regulating portion 43d of the split body 41 is guided appropriately by the outer peripheral surface 103a of the steel pipe 101 because the first regulating portion 43d is provided. The split body 41 can be moved along the circumferential direction R of the steel pipe 101, and it is possible to regulate that the split body 41 moves toward the inner peripheral side of the steel pipe 101 in the radial direction Q together with the wedge member 30. .. A force corresponding to the force for pushing the wedge member 30 acts on the outer peripheral surface 103a of the steel pipe 101 from the first regulating portion 43d, but the steel pipe 101 itself becomes the first connecting hole by receiving the force in the two steel pipes 101. It is possible to prevent the 10 and the second connecting hole 20 from being deformed, and to prevent the other steel pipe 101 from being deformed differently with respect to the 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 tip insertion portion 31 toward the base end insertion portion 32, so that the insertion hole 40a is expanded and divided. The bodies 41 can be separated from each other, and the engaging surfaces 42a and 43a of the divided bodies 41 can be pressed against the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20. As a result, a force in the direction along the circumferential direction R of the pile body 100 is applied to the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20 from the divided body 41 of the engaging member 40 in the circumferential direction R. It acts on each steel pipe 101 as a binding force to the steel pipe 101, and the frictional force generated by the binding force acts on each steel pipe 101 as a binding force in the axial direction P of the pile body 100, connecting the steel pipes 101 to each other. be able to. Here, in the present embodiment, the engaging portions 44 are provided on the engaging surfaces 42a and 43a of the divided body 41, and the engaging portion 44 is elastically deformed and sharpened by pushing the wedge member 30. The tip bites into the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20. By the restoring force and biting of the engaging portion 44, the engaging relationship between the engaging member 40 and the steel pipe 101 can be reliably maintained, and a binding 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 portion 205 is rotated while gripping the steel pipe 101, and the chuck frame 203 is moved downward to press-fit the steel pipe 101 while rotating it. it can. Then, once the steel pipe 101 is press-fitted by the stroke of the chuck frame 203, the grip of the steel pipe 101 by the chuck portion 205 is once released. Next, after moving the chuck portion 205 upward, the steel pipe 101 is gripped and rotated by the chuck portion 205 again and press-fitted. This is repeated, and when the steel pipe 101 is press-fitted until the upper end portion 101a of the steel pipe 101 is in a position where it can be gripped by the chuck portion 205, the main press-fitting step S10 is completed, and the joint step S20 is performed again.
In this way, the press-fitting process S10 and the joint process S20 are repeated, and when the planned number of steel pipes 101 are connected and press-fitted, the entire process is completed, and the 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 of the pile constituent members of the present embodiment, the first connecting hole 10 and the second connecting hole 20 formed in each steel pipe 101 which is the pile constituent member communicate with each other. It suffices to form it in a possible position, and it is not necessary to make it a complicated shape. Further, the insertion hole 40a 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. Therefore, even if the first connecting hole 10 and the second connecting hole 20 are slightly misaligned, the wedge member 30 is provided without the step difference due to the misalignment becoming the insertion resistance of the wedge member 30. It can be easily inserted and fitted. Further, the binding force for connecting the steel pipes 101 to each other 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 given by the wedge member 30. Therefore, the wedge member 30 can be easily inserted and pushed in, and the divided body is formed in the circumferential direction R orthogonal to the direction in which the wedge member 30 is inserted with respect to the steel pipe 101 while suppressing the influence of resistance at the time of pushing. By 41, the force can be effectively applied to exert the binding force. Further, therefore, the binding force can be easily and effectively applied to the steel pipe 101 simply by pushing the wedge member 30 without tightening with bolts. 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 complicated processing, and the pile configurations can be connected to each other. It is possible to effectively exert the binding force to restrain. Then, the pile body 100 can be formed by the steel pipes 101 which are easily and firmly connected by such a joint structure 1.

In particular, in the present embodiment, the engaging portion 44 of the split body 41 engages with the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20, thereby engaging the split body with respect to the steel pipe 101. The binding force can be applied more effectively by 41. Further, when the protrusion 33 of the wedge member 30 engages with the split body 41, the state in which the wedge member 30 is fitted with the split body 41 is loosened, and the binding force acting on the steel pipe 101 by the split body 41 is exerted. It is possible to more reliably prevent the decrease.

Further, the split body 41 can be inserted from the first connecting hole 10 and the split body 41 can be positioned by the first regulating unit 43d. Here, the split 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 regulating portion 43d is engaged as a guide to exert a binding force. Further, the first regulating portion 43d and the second regulating portion 42d engage 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 split body inserted from the first connecting hole 10 is inserted. It is possible to prevent 41 from falling off. Further, by inserting the wedge member 30, the split body 41 is orthogonal to the inner peripheral surfaces 10a and 20a of the first connecting hole 10 and the second connecting hole 20 in the axial direction P of the pile body 100. A force is applied to the circumferential direction R, which is the direction, to exert a binding force. Therefore, even if an external force acts on the pile body 100 composed of the steel pipe 101 in the axial direction P by press fitting or pulling out, the steel pipe 101, the engaging member 40, and the wedge member 30 are caused by the deformation due to the external force. It is possible to prevent the binding force of the steel pipe 101 from being loosened and the binding force on the steel pipe 101 from being lowered.
Further, in the joint structure of the pile constituent member of the present embodiment, the inner diameter of the joint portion 103 is made substantially equal to the outer diameter of the steel pipe 101, and the steel pipe 101 is inserted into the joint portion 103 to form the joint portion 103. It is not arranged so as to be arranged outside the steel pipe 101 and to be overlapped and connected to the steel pipe 101 inside the steel pipe 101. Therefore, when the steel pipe 101 is press-fitted, the joint portion does not become an obstacle even when the auger excavation inside the steel pipe 101 and various measurements are performed in parallel.
Further, in the method of joining the pile constituent members of the present embodiment, another method for pushing the wedge member 30 by pushing the wedge member 30 into the insertion hole 40a by utilizing the force gripped by the chuck portion 205 of the press-fitting machine 200. It is possible to proceed with the work related to the joint following the press-fitting work without having to prepare means. Further, by utilizing 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.

The joint structure 1 and the joint method of the pile constituent members of the first embodiment have been described above, but the present invention is not limited to this.
In the above, 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 is located above. The steel pipe 101 may be inserted and connected.
Further, the joint portion 103 is provided in advance on the steel pipe 101, and the joint portion 103 and the other steel pipe 101 are connected so as to overlap each other, but the present invention is not limited 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 press-fitted earlier is inserted into the lower portion of the joint portion 113, the lower portion of the joint portion 113 is used as the first connecting portion, and the lower end portion 111b of the upper steel pipe 111 is used as the second connecting portion. It may be connected by the joint structure 1 of this embodiment. Further, the upper portion of the joint portion 113 may be used as the first connecting portion, and the upper end portion 111a of the lower steel pipe 111 may be used as the second connecting portion to be connected by the joint structure 1 of the present embodiment.

Further, as shown in FIG. 17, the joint portion may be inserted into the inside of the steel pipe. That is, as shown in FIG. 17, the steel pipes 116 and 117 and the tubular joint portion 118 inserted inside the steel pipes 116 and 117 are connected by the joint structure 1 of the present embodiment. The outer diameter of the joint portion 118 is substantially equal to the inner diameter of the steel pipes 116 and 117. The upper end 118a is inserted into the lower end 116a of the upper steel pipe 116, the lower end 118b is inserted into the upper end 117a of the lower steel pipe 117, and is butted against the steel pipes 116 and 117. Here, in this modification, the first connecting holes 10 are formed in the lower end portion 116a of the steel pipe 116 and the upper end portion 117a of the steel pipe 117, respectively, and the lower end portion 116a and the upper end portion 117a are respectively in the first connecting portion. Equivalent to. Further, a 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. Corresponds to. By inserting the joint portion 118 into the steel pipes 116 and 117 in this way, the outer diameter of the entire pile body can be made uniform. In FIG. 17, one of the steel pipes 116 and 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 required in the overlapping portion of the one steel pipe welded to the joint portion 118 and the joint portion 118.

Further, as shown in FIG. 18, the entire other steel pipe 122 is 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 portion 122a of the other steel pipe 122 is inserted. As one connecting portion, the end portion 121a of one steel pipe 121 may be connected as a second connecting portion by the joint structure 1 of the present embodiment.

Further, in the above, the pile body is a steel pipe pile, and the pile constituent members constituting the pile body is a steel pipe, but the present invention is not limited to this. For example, it can be applied to steel pipe sheet piles and C-shaped steel sheet piles. For example, in the case of a steel sheet pile, as shown in FIGS. 19 to 21, the sheet pile member 131 and the joint plate 132 are overlapped as pile constituent members, and the overlapped portions are the first connecting portion and the second connecting portion. As the connecting portion, the joint structure 1 of the present embodiment may be used for connection. Further, in the above, all of the above targets the connection between steel materials, but the present invention is not limited to this, and can be applied to, for example, the connection between a concrete pile material and a joint material as a pile constituent member.

Further, in the joint structure 1 of the present embodiment, the engaging member 40 is composed of two divided bodies 41 divided in the circumferential direction R of the pile body 100, but the present invention is not limited 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 40a in a direction in which the width dimension expands in the axial direction P of the pile body 100 in accordance with the dividing direction of the engaging member 40.

Further, the engaging member may be composed of three or more divided bodies. FIG. 22 is a modified example joint structure 150. As shown in FIG. 22, the engaging member 160 in the joint structure 150 of 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 done. Further, the wedge member 170 is formed in a truncated cone shape, and is fitted into a truncated cone-shaped insertion hole 160a formed by the divided bodies 161, 162, and 163. In other words, the engaging member 160 is divided into a divided body 161 and divided bodies 162 and 163 in the first direction P1. Further, the engaging member 160 is divided into a divided body 162 and divided bodies 161 and 163 in a second direction P2 which is turned 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 which is turned 60 degrees from the first direction P1 and the second direction P2. Since the wedge member 170 is formed in a truncated cone shape, it gradually increases from the tip end to the base end in each width dimension of the first direction P1, the second direction P2, and the third direction P3. Has a shape of Even in the joint structure 150 of such a modified example, by pushing the wedge member 170, the divided bodies 161, 162, and 163 are expanded in the first direction P1, the second direction P2, and the third direction P3, respectively. It is possible to generate a binding force.

Further, the plurality of divided bodies constituting the engaging member have been described as separate parts, but the present invention is not limited to this. FIG. 23 shows the engaging member 181 in the joint structure 180 of the modified example. As shown in FIG. 23, the engaging member 181 in the joint structure 180 of this modified example has two divided bodies 41 and a connecting portion 182 connecting the divided bodies 41. The connecting portion 182 is formed of a flexible and deformable wire rod. Therefore, by narrowing the space between the divided bodies 41 while bending the connecting portion 182, it is possible to arrange the plurality of divided bodies 41 inside the first connecting hole 10 and the second connecting hole 20. The connecting portion 182 is formed to have a length that makes the wedge member 30 tense by pushing the wedge member 30 into the insertion hole 40a and expanding the space between the divided bodies 41, and further expands the connecting portion 182 to the extent that the wedge member 30 breaks. It is strong. By breaking in this way, it is possible to generate a binding force on the pile constituent member after pushing the wedge member 30. When the divided body 41 is expanded by the wedge member 30, it may not be broken and may only be elongated by elastic deformation or plastic deformation. Even in this case, it is sufficient that the divided body 41 can be expanded to generate a binding force on the pile constituent members. As described above, the divided bodies constituting the engaging member are not limited to those completely separated, and may be partially connected as long as they can be expanded by the wedge member 30 to exert a binding force. By being partially connected, the divided bodies are not separated from each other, and can be easily handled as one component.

Further, the first connecting hole 10 and the second connecting hole 20 have been described as circular through holes, but the present invention is not limited thereto. For example, it may have a different shape such as a rectangular hole. Further, the second connecting hole 20 may be configured to communicate with the first connecting hole 10 which is a through hole without penetrating the second connecting portion.
Further, the configurations of the first connecting hole, the second connecting hole, the engaging member and the wedge member constituting each joint structure are assumed to be arranged in a row at a predetermined pitch in the circumferential direction of the pile material. , A plurality of them may be arranged in the axial direction as well. 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 positions in the circumferential direction are different from each other, so-called staggered shape. It may be placed in.

Further, in the joint method of the above embodiment, in the engaging member expansion step S24, the wedge member 30 is pushed by the press-fitting machine 200, but the present invention is not limited to this, and a pushing-in device different from the press-fitting machine 200 is used. Alternatively, it may be pushed in manually with a hammer or the like. Further, in the method for manufacturing a pile body of the above embodiment, the steel pipe 101 is press-fitted by the press-fitting machine 200 and installed in the ground A as the press-fitting step S10, but the present invention is not limited to this, and the steel pipe 101 is installed in the ground A by driving. Alternatively, it may be built in a hole excavated in advance, or a plurality of pile materials may be connected in advance by the joint structure of the present embodiment and then installed in the ground A.

(Second embodiment)
Next, the second embodiment will be described with reference to FIG. 24. In the following description, the same reference numerals will be given to the configurations common to the first embodiment, and the description thereof will be 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 strong layer F2 located below the soft layer F1. In the present embodiment, the soft layer F1 is composed of low-density sand or the like, and is a ground that may be liquefied at the time of an earthquake. The strong layer F2 has a relatively high ground strength as compared with the soft layer F1, and has at least a ground strength capable of exerting a binding force against lateral displacement with respect to the arranged pile body 100A. However, it does not matter whether or not it has a bearing capacity in the vertical direction. Examples of such a strength layer F2 include a dense sand layer, a gravel layer, and a consolidated clay layer. In the present embodiment, the pile body 100A includes a plurality of joint structures 1, and one of the joint structures 1A is located in the soft layer F1.

Next, the action and effect of the pile body 100A of the present embodiment will be described. When an earthquake occurs, a periodic vertical load is generated on the pile body 100A. At this time, the main bodies 102 of the steel pipes 101 connected by the joint structure 1 have a structure at the end, so that the compressive load can be reliably transmitted. On top of that, the steel pipes 101 are not directly connected by the joint structure 1, but the wedge member 30 and the wedge member 30 and the main body 102 of the other steel pipe 101 are inserted into the joint 103 of one steel pipe 101. It is connected via a connecting portion composed of the engaging member 40. Therefore, the relative relationship between the connecting portion between the connecting portion and each steel pipe 101, the connecting portion between the components in the connecting portion composed of a plurality of constituent parts such as the wedge member 30 and the engaging member 40 is elastically caused by the seismic force. The damper effect can be exerted by changing and exerting the restoring force. Therefore, when a seismic force is generated, the vertical stress generated in the pile body 100A can be relaxed.

Further, when a liquefaction phenomenon occurs in the soft layer F1 at the time of an earthquake, the soil particles constituting the soft layer F1 flow laterally. When the pile body 100A flows laterally, the binding force against the lateral displacement of the pile body 100A is lost from the soft layer F1, but rather the horizontal force due to the lateral flow acts on the pile body 100A. On the other hand, since the liquefaction phenomenon does not occur in the strength layer F2 located below the soft layer F1, the pile body 100A is constrained by lateral displacement from the strength layer F2. Therefore, the pile body 100A is bent and deformed in the soft layer F1, which causes tensile stress. Also at this time, in the range of the soft layer F1 in which the bending deformation occurs, the steel pipes 101 are not directly connected to each other, but are connected to each other via the joint structure 1A, so that the connecting portion and each steel pipe 101 are connected to each other. The relative relationship between the connecting portions of the connecting portion, the wedge member 30 and the engaging member 40, which are the connecting portions of the connecting portion, is elastically changed, and the steel pipe 101 itself is bent and deformed. The stress can be relieved.

The seismic effect at the time of such an earthquake is not limited to the joint structure 1 as described above, and may be the joint structure 150 shown in FIG. 22 or the joint structure 180 shown in FIG. 23. Further, the joint structure 200 as shown in FIG. 25 may be used. In the joint structure 200 of this modification, the diameter of the second connecting hole 20 is smaller than the diameter of the first connecting hole 10. Therefore, 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 stepped portion formed by the outer peripheral surface 102a at the upper end 101a of the lower steel pipe 101. It has 102c.

Further, the engaging member 40 is composed of a plurality of divided bodies 201 divided and arranged side by side in the circumferential direction R. The divided body 201 has a tip portion 202 formed in a substantially semicircular shape and arranged in the second connecting hole 20, and a base end portion formed in a substantially semicircular shape and arranged in the first connecting hole 10. It has 203 and. The outer diameter of the tip portion 202 and the outer diameter of the base end portion 203 have dimensions corresponding to the diameters of the corresponding second connecting hole 20 and the first connecting hole 10, respectively. Therefore, the outer diameter of the tip portion 202 is smaller than the outer diameter of the base end portion 203, and the base end portion 203 has an inner peripheral surface 10a of the first connecting hole 10 along the step portion 102c with respect to the tip end portion 202. Overhanging toward.

Further, in the present embodiment, the joint structure 1A is arranged in the soft layer F1, but the present invention is not limited to this. For example, the joint structure 1A may be arranged at the boundary Fb between the soft layer F1 and the strong layer F2. Further, the joint structure 1A may be provided in a range in which the pile body 100A bends and deforms when the soft layer F1 flows laterally due to liquefaction. The bending deformation occurs in the range near the boundary Fb in the soft layer F1 and the strong layer F2. Therefore, the joint structure 1A may be arranged on the strength layer F2 side near 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 during an earthquake, and may be, for example, a peat layer that flows laterally due to a landslide or the like during an earthquake, that is, a peat layer that flows laterally during an earthquake. Any layer with landslide potential may be used.

Based on 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 the pile constituent members that make up the pile body by overlapping each other.
It is arranged near the boundary between a soft layer that may flow laterally during an earthquake, or a strong layer whose ground strength is relatively high relative to 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 connecting hole penetrating in a direction in which the pile constituent members overlap each other.
A second connecting portion provided on the other pile constituent member so as to overlap the first connecting portion and having a second connecting hole communicating with the first connecting hole.
The first connecting hole and the connecting portion inserted into the second connecting hole and fitted to each of the first connecting holes are provided.
The connecting portion is a joint structure of a pile component member composed of a plurality of components.
Further, in the joint structure,
The connecting portion is a joint structure including the wedge member and the engaging member composed of the plurality of divided bodies as the constituent parts.

Although the embodiments and modifications of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to these embodiments and modifications, and the design changes are not deviated from the gist of the present invention. Etc. are also included.

1, 150, 180 Joint structure 10 First connecting hole 20 Second connecting hole 30, 170 Wedge member 31 Tip insertion part 32 Base end insertion part 33 Projection part 40, 160 Engagement members 40a, 160a Insertion holes 41, 161 , 162, 163 Divided body 42 Tip part 42d Control part 43 Base end part 44 Engagement part 100 Pile body 101, 111, 121, 122 Steel pipe (pile component)
101a Upper end (second connection)
102c Step 103 Joint (first connection)
111a Upper end (second connection)
111b Lower end (second connection)
113 Joint (pile component, first connection)
121a Upper end (second connection)
122a Lower end (first connection)
200 Press-fitting machine 205 Chuck part (grip 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 the pile constituent members that make up the pile body by overlapping 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 connecting hole penetrating in a direction in which the pile constituent members overlap each other.
A second connecting portion provided on the other pile constituent 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 portion on the first connecting hole side is larger than the width dimension of the tip insertion portion on the second connecting hole side when inserted into the first connecting hole and the second connecting hole. A wedge member with a large shape and
A plurality of wedge members that are fitted between the wedge member, the first connecting hole, and the second connecting hole, and are divided in a direction in which the width of the base end insertion portion is widened with respect to the tip insertion portion of the wedge member. With an engaging member composed of the divided bodies of
The split body is a joint structure of a pile component having a first regulating portion that engages with a surface of the first connecting portion that overlaps with the second connecting portion and is opposite to the surface. In the joint structure of the pile constituent member according to claim 1,
The first connecting hole and the second connecting hole are joint structures of pile constituent members formed in substantially the same shape. In the joint structure of the pile constituent member according to claim 1 or 2.
The split body is a pile having an engaging portion that protrudes toward the first connecting hole and the second connecting hole and engages with the inner peripheral surface of the first connecting hole and the second connecting hole. Joint structure of components. In the joint structure of the pile constituent member according to any one of claims 1 to 3.
The wedge member is a joint structure of a pile component having a protrusion that projects toward the split body and engages with the split body. In the joint structure of the pile constituent member according to any one of claims 1 to 4.
The second connecting hole penetrates the second connecting portion.
The split body is a joint structure of a pile component having a second regulating portion that engages with a surface of the second connecting portion that overlaps with the first connecting portion and is opposite to the surface. In the joint structure of the pile constituent member according to any one of claims 1 to 5.
The engaging member is a joint structure of a pile component member which is divided by a plurality of the divided bodies in a direction orthogonal to the axial direction of the pile body. A pile body having a joint structure of the pile constituent members according to any one of claims 1 to 6 and comprising a plurality of pile constituent members connected to each other. It is a joint method of pile constituent members that connect the pile constituent members that make up the pile body by overlapping each other.
A first connecting hole provided through the first connecting portion provided on one of the pile constituent members and a second connecting portion provided on the other second connecting portion provided on the pile constituent member. 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 pile constituent member so as to communicate with each other. When,
By arranging a plurality of divided bodies constituting the engaging member side by side along the inner peripheral surfaces of the first connecting hole and the second connecting hole, the first divided body is surrounded by the plurality of divided bodies. The first connecting the divided body constituting the engaging member 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 engaging member arranging step of inserting through a hole and engaging the first regulating portion formed in the divided body with a surface of the first connecting portion on the side opposite to the surface overlapping the second connecting portion.
A plurality of engaging members are in a direction in which the width of the base end insertion portion is widened with respect to the tip insertion portion of a wedge member having a shape in which the width dimension of the base end insertion portion is larger than the width dimension of the tip insertion portion. The wedge member is set so that the tip insertion portion is on the second connecting hole side and the base end insertion portion is on the first connecting hole side in the direction of division by the divided body. The wedge member insertion step of inserting into the insertion hole and
An engaging member expansion step of pushing the wedge member inserted into the insertion hole into the insertion hole and expanding the split body toward the inner peripheral surfaces of the first connecting hole and the second connecting hole. A method of joining pile components comprising. In the method of joining the pile constituent members according to claim 8,
In the engaging member expansion step, the grip portion in the press-fitting machine that grips the peripheral surface of the pile body by the grip portion and press-fits the pile body in the axial direction is at a position where the wedge member is inserted into the insertion hole. A method of joining a pile constituent member in which the wedge member is pushed into the insertion hole by the gripped portion by gripping the pile constituent member. A press-fitting process in which the pile constituent members are gripped by the gripping portion of the press-fitting machine and press-fitted into the ground.
The upper end portion of the pile constituent member press-fitted in the press-fitting step is the first connecting portion or the second connecting portion, and the lower end portion of the newly connected pile constituent member is the second connecting portion or the second connecting portion. The first connecting portion includes a joint process for connecting the pile constituent members by the method of joining the pile constituent members according to claim 8 or 9.
A method for manufacturing a pile body in which the pile body is formed 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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