JP6237078B2 - Pile joint structure and pile standing method - Google Patents

Description

  The present invention relates to a pile joint structure for connecting an upper pile with a mechanical joint to a lower pile provided with a spiral blade at either one or both of a lower end portion and an intermediate portion, and a pile standing method. About.

  Conventionally, steel pipe piles, etc., have been constructed with no noise, no vibration, and no soil when driven into the ground as pile foundations in urban areas where there are densely populated houses and other structures. Necessary.

  In recent years, as a steel pipe pile driven into the ground, there is a tendency to use a rotary press-fit pile that can be rotated and press-fitted to the ground, and in particular, rotation with blades with blades attached to the main body of the steel pipe pile. A press-fit pile is often used as a steel pipe pile driven into the ground. The bladed rotary press-fit pile is press-fitted into the ground while rotating smoothly by the blade attached to the main body of the steel pipe pile.

  The rotary press-fitted pile with blades can be constructed with no noise, no vibration, and no soil by rotary press-fitting to the ground, so it is used in various construction conditions, for example, above the ground where the steel pipe pile is driven It may be used in places where the height is restricted by other structures in the space. At this time, the rotary press-fit pile with blades uses a plurality of steel pipe piles divided into short lengths, and by sequentially driving these steel pipe piles into the ground and connecting them in the axial direction, the support layer in the ground Rotating press fit. Thereby, the rotary press-fit pile with blades is driven until reaching a predetermined depth even in a place where the height is restricted by other structures, etc., and a pile foundation driven into the support layer in the ground is provided. The

  Therefore, the rotary press-fitted pile with blades needs to join the ends in the axial direction of the steel pipe piles when the plurality of steel pipe piles are sequentially driven into the ground and connected in the axial direction. For joining the ends of the steel pipe pile, for example, a method of joining the ends of the steel pipe pile by welding or a method of joining by providing a mechanical joint at the end of the steel pipe pile is used. As mechanical joints provided at the ends of steel pipe piles, for example, joint structures of piles as disclosed in Patent Documents 1 and 2 have been proposed.

  The pile joint structure disclosed in Patent Document 1 is a steel pipe pile joint structure classified as a gear type, and has a plurality of outward engaging convex portions along the axial direction at the male end of the steel pipe pile. While providing, a some inward engagement convex part is provided along an axial center direction in the female side edge part of a steel pipe pile. In the joint structure of a pile disclosed in Patent Document 1, the male end of the steel pipe pile is inserted into the female end, and the steel pipe pile is fitted so that the outward engaging convex portion and the inward engaging convex portion are engaged with each other. By rotating relatively, the upper steel pipe pile and the lower steel pipe pile are connected in the axial direction.

  The joint structure of a pile disclosed in Patent Document 2 is a joint structure of a rotary press-fit pile with blades used for a composite pile of a soil cement column and a rotary press-fit pile with blades, and has an outer diameter larger than that of the pile body. A plurality of piles are connected in the axial direction by providing a plate at the end of the pile and joining the ends of the plurality of piles with the end plates. In the joint structure of the pile disclosed in Patent Document 2, a pair of end plates is provided at the end of the pile where the plurality of piles face in the axial direction, and the vertical direction formed on each of the pair of end plates The end portions of a plurality of piles are joined by overlapping the notch portions and fitting the H-shaped metal fittings.

Japanese Patent Laid-Open No. 11-43937 (page 6, FIG. 1) JP 2003-49425 A (Page 4, FIG. 2)

  However, the method of joining the ends of steel pipe piles by welding is to join the ends of steel pipe piles driven into the ground and the ends of other steel pipe piles connected to the steel pipe piles by field welding. Therefore, the time required for welding work increases in proportion to the pile diameter and thickness of the steel pipe pile, which not only prolongs the construction period of pile driving, There was a problem that the construction cost would increase. Also, the method of joining the ends of steel pipe piles by welding is that when steel pipe piles are driven outdoors, if welding is performed in stormy weather such as rain or strong winds, welding defects will occur at the welding points. Since there is a possibility that the part does not meet the prescribed strength (compression, tension, shear, etc.), it is necessary to interrupt the construction in order to avoid the occurrence of this welding failure, and there is a possibility that the construction period of pile driving will be prolonged. There was a problem that there was.

  Moreover, since the joint structure of the pile disclosed by patent document 1 does not require the joining by welding, and provides a mechanical joint in the edge part of a steel pipe pile, it is a construction period shorter than the joining by welding. It is to realize the construction of. However, in the joint structure of the pile disclosed in Patent Document 1, the structure of the male side end and the female side end of the steel pipe pile is complicated, and the outward engagement convex part and the inward engagement convex part are The plate thickness of the steel pipe pile may be increased as a whole or only at the joint portion because it is made to resist the indentation load, tensile load, and bending load acting on the steel pipe pile.

  For this reason, the joint structure of the pile disclosed in Patent Document 1 is such that the plate thickness of the steel pipe pile increases inward or only in the joint part, and the inner diameter of the steel pipe pile becomes small. 12 becomes difficult to use, or a small-diameter hammer magnet 19 must be used. At this time, the joint structure of the pile disclosed in Patent Document 1 cannot efficiently carry out the soil removal from the inside of the steel pipe pile with the hammer magnet 19 together with the driving of the steel pipe pile. There was a problem that the construction cost of driving piles would be increased as well as prolonged.

  Furthermore, since the joint structure of the pile disclosed by patent document 2 has an end plate with an outer diameter larger than a pile main body at right angle with respect to an axial direction, it is in the advancing direction when a pile is driven into the ground. On the other hand, the end plate resists at right angles, and the load required for driving the pile into the ground increases, which not only increases the construction cost of driving the pile, but also extends the work period of driving the pile. There was a problem of fear.

  Therefore, the present invention has been devised in view of the above-mentioned problems, and the object of the present invention is to be able to join the ends of the pile in a shorter time than joining by welding, and to efficiently drive the pile. An object of the present invention is to provide a pile joint structure and a method for erecting a pile that can be implemented in a practical manner and can avoid an increase in the construction cost of pile driving and a prolonged construction period of pile driving.

The pile joint structure according to the first invention is a pile joint structure for connecting another pile to a pile provided with a spiral blade at either one or both of a lower end portion and an intermediate portion, and a lower pile. Or a lower flange formed to extend outward from the outer peripheral surface at the upper end of the intermediate pile, and an upper flange formed to extend outward from the outer peripheral surface at the lower end of the upper pile or intermediate pile, The flange and the upper flange are formed in a spiral shape, and are joined to each other in a state where the upper surface of the lower flange and the lower surface of the upper flange are in surface contact with each other. The width of the upper flange in the direction orthogonal to the axial center is formed to be smaller than the width of the spiral blade in the direction orthogonal to the axial center, and the lower flange and the upper flange are joined to each other in the rotational press-fitting of the pile. Rotational force by One or both of the compressive force and the tensile force acting in the axial direction of the pile having a predetermined length in the axial direction from the terminal end of the spiral blade at the upper end of the lower pile and the lower end of the upper pile The lower locking portion and the upper locking portion that are curved with each other are engaged with each other so that they can be transmitted from the lower locking portion and the upper locking portion, which are end faces, to the pile body. locked and said Rukoto.

  A pile joint structure according to a second aspect of the present invention is the pile structure according to the first aspect, wherein the lower flange and the upper flange are partly cut away in the circumferential direction, and the helical pitch of the spiral blades provided in the lower pile It is characterized by being formed in a spiral shape with substantially the same spiral pitch.

  A pile joint structure according to a third invention is the first invention or the second invention, wherein the lower flange and the upper flange are each formed with a bolt hole, and an upper surface of the lower flange and a lower surface of the upper flange are formed. It is characterized in that it is bolted in a state where it is in surface contact.

  The joint structure of the pile according to the fourth invention is any one of the first invention to the third invention, wherein the lower flange and the upper flange are provided on one or both of the upper surface of the lower flange and the lower surface of the upper flange. A convex portion formed by projecting in the vertical direction, and a concave portion into which the convex portion is inserted in a state where the upper surface of the lower flange and the lower surface of the upper flange are in surface contact with each other. To do.

  In the pile joint structure according to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, the lower flange and the upper flange have a lower groove in which an end surface on the upper surface side is notched on a side surface of the lower flange. An upper groove formed on the side surface of the upper flange and having the upper surface of the lower flange and the lower surface of the upper flange in surface contact with each other. And a key member is installed in the upper groove.

The pile erection method according to the sixth aspect of the present invention is the erection of a pile that is erected in the ground by connecting another pile to a pile provided with spiral blades at one or both of the lower end part and the intermediate part. The upper pile of the lower pile or intermediate pile extends outward from the outer peripheral surface and is formed in a spiral shape, and the width in the direction perpendicular to the axis is smaller than the width in the direction perpendicular to the axis of the spiral blade. The lower flange and the lower end of the upper pile or intermediate pile extend outward from the outer peripheral surface and are formed in a spiral shape, and the width in the direction perpendicular to the axis is smaller than the width in the direction perpendicular to the axis of the spiral blade In the state where the upper flange formed is brought into contact with the upper surface of the lower flange and the lower surface of the upper flange, the rotational force due to the rotary press-fitting of the pile and the compression acting in the axial direction One or both of the force and tensile force are applied to the upper and upper ends of the lower pile. Curved from each other so that it can be transmitted to the pile body from the lower locking part and the upper locking part which are end faces of the pile having a predetermined length in the axial direction from the terminal end of the spiral blade at the lower end of the pile The lower locking portion and the upper locking portion are engaged with each other so as to bite into each other, and either one or both of the lower pile, the upper pile and the intermediate pile are rotationally press-fitted into the ground. And a press-fitting step.

The pile standing method according to the seventh aspect is the sixth invention, in the sixth invention, after the press-fitting step, and further, any one or both of the lower pile, the upper pile and the intermediate pile that are integrally rotationally press-fitted into the ground. It is characterized by including a soil removal process for discharging earth and sand from the inside.

The pile standing method according to an eighth invention is the sixth invention or the seventh invention, wherein after the press-fitting step, any one of a lower pile, an upper pile, and an intermediate pile that are integrally rotationally press-fitted into the ground It is characterized by comprising a reinforcing step of reinforcing a pile by injecting a time-curable material together inside one or both.

According to 1st invention- 5th invention, in the state which joined the lower flange and the upper flange mutually, since the joint structure of a pile is formed helically, the rotational press-fit resistance of the joint structure of a pile is made small. It is possible to suppress the increase in load required for driving the lower pile and upper pile, and it is possible to avoid an increase in the construction cost of driving the pile, and to shorten the construction period of the pile driving It becomes possible to do.

Further, according to the first to fifth inventions, since the lower flange and the upper flange are inclined with respect to the axial direction, not only the lower flange and the upper flange, but also the lower pile body and the upper pile body, A part of the compressive force, tensile force, bending force and shearing force can be borne, making it easy to design the joint part, and reducing the thickness of the lower flange and the upper flange. Therefore, it is possible to reduce the rotational press-fit resistance due to the joint structure of the pile, and to suppress an increase in load required for driving the lower pile and the upper pile.

In addition, according to the first to fifth inventions, the lower flange and the upper flange are formed so as to extend outward from the outer peripheral surfaces of the lower pile, the upper pile, and the intermediate pile. In the press-fitting process of the pile standing method, it is possible to smoothly carry out the rotary press-fitting work of the pile by facilitating the movement of the earth and sand inside the lower pile and the upper pile or the intermediate pile. Become.

Furthermore, according to 1st invention- 5th invention, by increasing the internal diameter of a pile main body or a joint part, in the earth removal process of the standing method of a pile, it is outside on the inner side of a lower pile, an upper pile, and an intermediate pile. A large-diameter hammaglab can be used, and it is possible to efficiently carry out the sediment discharge work, and in the reinforcement process of the pile standing method, the time inside the lower pile, upper pile and intermediate pile The passage of the curable material through the joint portion can be facilitated, and the filling operation of the time-curable material can be easily performed. Thereby, according to 1st invention- 5th invention, while it becomes possible to shorten the construction period of pile driving, it becomes possible to avoid that the construction cost of pile driving increases.

  In particular, according to the second invention, the rotational press-fit resistance of the pile joint structure is configured such that the spiral pitch of the pile joint structure and the spiral pitch of the spiral blades are substantially the same spiral pitch. Therefore, it is possible to suppress an increase in the load required for driving the lower pile and the upper pile, and to avoid an increase in the construction cost of driving the pile. It is possible to shorten the driving time.

  According to the second invention, the lower locking portion and the upper locking portion having a predetermined length in the axial direction are locked to each other, and the rotational force is applied from the lower locking portion to the lower pile body. Part of the torque is transmitted, and a part of the rotational force is transmitted from the upper locking part to the upper pile body, and the rotational force acting on the bolt that joins the lower flange and the upper flange is reduced. In addition, it is possible to use small-diameter bolts and to connect piles in a short time with simple work, thereby shortening the construction period of pile driving and avoiding an increase in material costs. It becomes possible to do.

  In particular, according to the third invention, since the lower flange and the upper flange are bolted by a mechanical flange joint, the upper end of the lower pile and the lower end of the upper pile are compared with the case of joining by welding. Can be joined to each other in a short time, and can be firmly joined by a simple operation. As a result, it is possible to shorten the construction period of pile driving and to avoid an increase in the construction cost of pile driving.

  In particular, according to the fourth invention, since the convex portion of the lower flange is locked to the concave portion of the upper flange, a part of the rotational force is transmitted from the convex portion of the lower flange to the lower flange and the upper flange, The rotational force acting on the bolt that joins the lower flange and the upper flange can be reduced. As a result, the rotational force acting on the bolt can be reduced, the number of bolts can be reduced, the amount of bolt fastening work can be reduced, and the work can be joined in a short time with simple work. It is possible to shorten the construction period.

  In particular, according to the fifth aspect of the present invention, since the key member is engaged with the lower groove and the upper groove, a part of the rotational force is transmitted to the key member, and the lower flange and the upper flange are connected. The rotational force acting on the bolts to be joined can be reduced. As a result, the rotational force acting on the bolt can be reduced, the number of bolts can be reduced, the amount of bolt fastening work can be reduced, and the work can be joined in a short time with simple work. It is possible to shorten the construction period.

  In particular, according to the sixth invention, a part of the rotational force is transmitted from the lower locking part to the lower pile body, and a part of the rotational force is transmitted from the upper locking part to the upper pile body, The acting rotational force can be reduced, the number of bolts can be reduced, and small-diameter bolts can be used. It becomes possible to avoid the increase in material cost.

In particular, according to the first aspect of the invention, the lower locking portion is formed to be curved, and the upper locking portion is formed to be curved, whereby the curved lower locking portion and the upper locking portion are engaged. By biting together, it becomes possible to increase the resistance to compressive force and tensile force.

According to the sixth invention, since the lower flange and the upper flange are formed in a spiral shape with each other, the rotational press-fitting resistance of the joint structure of the pile integrated with the lower pile, the upper pile and the intermediate pile is reduced. It is possible to reduce the increase in rotational force required for driving the lower and upper piles, and to connect multiple piles together for rotational press-fitting. Therefore, it is possible to reduce the trouble of repeating the process.

According to the seventh invention, the lower pile, the upper pile, and the intermediate pile can be connected and the earth and sand can be discharged collectively from the inside, so it is time and labor to repeat the earth and sand discharging work and the pile joining work alternately. Can be reduced.

According to the eighth invention, the lower pile, the upper pile, and the intermediate pile can be connected to each other and the time-curable material can be injected into the inside thereof. It is possible to reduce the trouble of repeating the steps alternately.

It is a perspective view which shows the state which connected the intermediate pile between the lower pile and the upper pile using the joint structure of the pile to which this invention is applied. It is a perspective view which shows the lower pile used for the joint structure of the pile to which this invention is applied. It is a perspective view which shows the upper pile used for the joint structure of the pile to which this invention is applied. It is a perspective view which shows the intermediate | middle pile used for the joint structure of the pile to which this invention is applied. It is a front view which shows the helical blade | wing of the lower pile used for the joint structure of the pile to which this invention is applied. It is a perspective view which shows the state which connected the lower pile and the upper pile using the joint structure of the pile which applied this invention. It is a front view which shows the lower flange in 1st Embodiment of the joint structure of the pile to which this invention is applied. It is a front view which shows the modification of the lower flange in 1st Embodiment of the joint structure of the pile to which this invention is applied. It is a front view which shows the upper flange in 1st Embodiment of the joint structure of the pile to which this invention is applied. It is a front view which shows the modification of the upper flange in 1st Embodiment of the joint structure of the pile to which this invention is applied. It is a front view which shows the state which connected the lower pile and the upper pile using 1st Embodiment of the joint structure of the pile to which this invention is applied. It is a perspective view which shows the hammaglab for implementing the earth removal from the inner side of a pile with driving of a pile. It is explanatory drawing for demonstrating the compressive force, tensile force, bending force, and shearing force which act on the joint structure of the pile to which this invention is applied. It is explanatory drawing for demonstrating the compressive force and tensile force which act on the joint structure of the pile to which this invention is applied in a modification. It is a perspective view which shows 2nd Embodiment of the joint structure of the pile to which this invention is applied. It is a front view which shows the state which connected the lower pile and the upper pile using 2nd Embodiment of the joint structure of the pile to which this invention is applied. It is explanatory drawing for demonstrating the rotational force which acts on the joint structure of the pile to which this invention is applied. It is a perspective view which shows 3rd Embodiment of the joint structure of the pile to which this invention is applied. It is a front view which shows the state which connected the lower pile and the upper pile using 3rd Embodiment of the joint structure of the pile to which this invention is applied. It is a perspective view which shows 4th Embodiment of the joint structure of the pile to which this invention is applied. It is a front view which shows the state which connected the lower pile and the upper pile using 4th Embodiment of the joint structure of the pile to which this invention is applied. It is a front view which shows the end surface of the starting end part of the lower flange and upper flange which were formed by sharpening the joint structure of the pile to which this invention is applied. It is a front view which shows the lower flange and upper flange which are attached to the lower pile of the pile joint structure to which this invention is applied, an upper pile, and an intermediate | middle pile. It is a perspective view which shows the flange member used for the lower flange and upper flange of the joint structure of the pile to which this invention is applied. It is an enlarged front view which shows the aspect by which the flange member of the joint structure of the pile to which this invention is applied is fixed to a lower pile main body, an upper pile main body, and an intermediate | middle pile main body. It is a front view which shows the press-fit process of the standing installation method of the pile to which this invention is applied. It is a front view which shows the soil removal process of the erection method of the pile to which this invention is applied. It is a front view which shows the reinforcement process of the standing installation method of the pile to which this invention is applied.

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

  The pile joint structure 1 to which the present invention is applied is used to connect the lower pile 2 and the upper pile 3 in the axial direction X. As shown in FIG. 1, the pile joint structure 1 to which the present invention is applied has a predetermined number of intermediate piles 4 between the lower pile 2 and the upper pile 3 according to the depth of the support layer in the ground. The lower pile 2 can be driven into the ground to a predetermined depth.

  As shown in FIG. 2, the lower pile 2 is provided with a spiral blade 11 at the lower end 2a and a lower flange 12 at the upper end 2b. Not only this but the lower pile 2 can also provide the spiral blade | wing 11 in the intermediate part 2c according to the support force required in the ground, and it spirals in any one or both of the lower end part 2a and the intermediate part 2c. A blade 11 can be provided.

  As shown in FIG. 3, the upper pile 3 is provided with an upper flange 13 at the lower end 3a. The upper pile 3 can also be provided with a lower flange 12 at the upper end portion 3b, and according to the supporting force required in the ground, a spiral blade 11 is provided in the intermediate portion 3c, and the spiral blade 11 is formed in the intermediate layer of the ground. However, by obtaining a reaction force from the surrounding soil, the resistance force in the axial direction X of the upper pile 3 can be increased.

  As shown in FIG. 4, the intermediate pile 4 is provided with an upper flange 13 at the lower end 4a and a lower flange 12 at the upper end 4b. The intermediate pile 4 is provided with a spiral blade 11 in the intermediate portion 4c according to the supporting force required in the ground, and the spiral blade 11 obtains a reaction force from the surrounding soil in the intermediate layer of the ground. The resistance force in the axial direction X of 4 can be increased.

  As shown in FIG. 5, the spiral blade 11 is provided at the lower end portion 2 a of the lower pile 2 so as to extend outward from the outer peripheral surface of the lower pile 2. The spiral blade 11 has a flat upper surface 11a and a lower surface 11b of the spiral blade 11, and has a predetermined length L1 in the axial direction X from the start end portion 11c to the end portion 11d of the spiral blade 11. The spiral blade 11 has a predetermined width W1 in the axis-perpendicular direction Y and a predetermined plate thickness T1, and the end surface of the start end portion 11c is sharpened, thereby rotating the piles. Resistance can be reduced.

  The spiral blade 11 is provided by welding or the like by rotating once in the circumferential direction Z of the pile from the start end portion 11c to the end portion 11d of the spiral blade 11. When the lower blade 2 is rotationally press-fitted into the ground, the spiral blade 11 rotates the lower pile 2 in the circumferential direction Z once in the ground, thereby causing the lower pile 2 to move in a predetermined direction in the axial direction X in the ground. Can be press-fitted only by the length L1, and is constituted by a predetermined helical pitch P1 having substantially the same length as the length L1 in the axial direction X.

  As shown in FIG. 6, the pile joint structure 1 to which the present invention is applied includes a lower flange 12 formed in a spiral shape so as to extend outward from an outer peripheral surface at an upper end 2 b of the lower pile 2, and an upper pile 3. And an upper flange 13 formed in a spiral shape so as to extend outward from the outer peripheral surface at the lower end 3a. The pile joint structure 1 to which the present invention is applied includes the lower flange 12 and the upper flange 12 in a state in which the upper surface 12a of the lower flange 12 shown in FIG. 7 and the lower surface 13b of the upper flange 13 shown in FIG. The flange 13 is joined to each other by bolting or the like.

  In the joint structure 1 of the pile to which the present invention is applied, in the first embodiment, the upper surface 12a and the lower surface 12b of the lower flange 12 shown in FIG. 7 are formed in a planar shape, and the upper surface 13a of the upper flange 13 shown in FIG. And the lower surface 13b is formed in a planar shape.

  As shown in FIG. 7, the lower flange 12 is attached to the circumferential direction Z of the lower pile 2 by welding or the like at the upper end portion 2 b of the lower pile 2 from the start end portion 12 c to the terminal end portion 12 d of the lower flange 12. The lower flange 12 is formed with a plurality of bolt holes 12e penetrating from the upper surface 12a to the lower surface 12b of the lower flange 12 in a direction perpendicular to the upper surface 12a and the lower surface 12b of the lower flange 12.

  The lower flange 12 is formed with a linear lower locking portion 14 by notching a part of the upper end portion 2b of the lower pile 2 linearly in the axial direction X. The lower flange 12 is not limited to this, and as shown in FIG. 8, a curved lower locking portion 14 is formed by curving a part of the upper end portion 2 b of the lower pile 2 in the axial direction X. May be.

  The lower flange 12 has a predetermined length L2 in the axial direction X from the start end 12c to the end 12d of the lower flange 12. The lower flange 12 has a predetermined width W2 in the axial center orthogonal direction Y and a predetermined plate thickness T2 so that a plurality of bolt holes 12e can be formed. It can also be sharpened.

  The lower flange 12 is provided by rotating once in the circumferential direction Z of the pile from the start end portion 12c to the end end portion 12d of the lower flange 12. The lower flange 12 rotates the lower pile 2 in the ground in the circumferential direction Z when the lower pile 2 is rotationally press-fitted into the ground. It can be press-fitted only by the length L2, and is constituted by a predetermined helical pitch P2 having substantially the same length as the length L2 in the axial direction X.

  As shown in FIG. 9, the upper flange 13 is attached to the circumferential direction Z of the upper pile 3 by welding or the like at the lower end portion 3 a of the upper pile 3 from the start end portion 13 c to the terminal end portion 13 d of the upper flange 13. The upper flange 13 is formed with a plurality of bolt holes 13 e penetrating from the upper surface 13 a to the lower surface 13 b of the upper flange 13 in a direction perpendicular to the upper surface 13 a and the lower surface 13 b of the upper flange 13.

  The upper flange 13 is formed with a linear upper locking portion 15 by cutting a part of the lower end portion 3a of the upper pile 3 linearly in the axial direction X. The upper flange 13 is not limited to this, and as shown in FIG. 10, a curved upper locking portion 15 is formed by curving a part of the lower end portion 3 a of the upper pile 3 in the axial direction X. May be.

  The upper flange 13 has a predetermined length L3 in the axial direction X from the start end 13c to the end end 13d of the upper flange 13. The upper flange 13 has a predetermined width W3 in the axial center orthogonal direction Y and a predetermined plate thickness T3 so that a plurality of bolt holes 13e can be formed. It can also be sharpened.

  The upper flange 13 is provided by rotating once in the circumferential direction Z of the pile from the start end portion 13c to the end end portion 13d of the upper flange 13. When the upper flange 13 rotates and press-fits the upper pile 3 to the ground, the upper pile 3 is rotated once in the circumferential direction Z in the ground, whereby the upper pile 3 is rotated in the ground in a predetermined direction in the axial direction X. It can be press-fitted only by the length L3, and is constituted by a predetermined spiral pitch P3 having substantially the same length as the length L3 in the axial direction X.

  As shown in FIG. 11, the pile joint structure 1 to which the present invention is applied is configured such that the helical pitch P2 of the lower flange 12 and the helical pitch P3 of the upper flange 13 have substantially the same helical pitch. . Therefore, the pile joint structure 1 to which the present invention is applied includes an upper surface 12a of the lower flange 12 formed in a spiral shape and a lower surface 13b of the upper flange 13 formed in a spiral shape shown in FIG. Is brought into surface contact.

  The pile joint structure 1 to which the present invention is applied has a width W2 of the lower flange 12 in the direction perpendicular to the axis Y and a width W3 of the upper flange 13 in the direction perpendicular to the axis Y. By making it smaller than the width W1, the rotary press-fit resistance of the pile joint structure 1 can be reduced. The pile joint structure 1 to which the present invention is applied is not limited to this, and the width W2 of the lower flange 12 in the direction perpendicular to the axial center Y and the width W3 of the upper flange 13 in the direction perpendicular to the axial center Y are As the size of the width W1 or more in the direction perpendicular to the core, the propulsive force in the joint structure 1 of the pile when rotating and press-fitting is improved, and the resistance force in the axial direction X of the pile is increased, A predetermined supporting force can also be obtained.

  In the first embodiment, the pile joint structure 1 to which the present invention is applied is such that the bolt hole 12e shown in FIG. 7 of the lower flange 12 and the bolt hole 13e shown in FIG. By inserting and fastening, the lower flange 12 and the upper flange 13 are bolted together. The joint structure 1 of the pile to which the present invention is applied is bolted using eight bolts 16, but is not limited to this, and acts on the pile that has been driven and the torque when rotating the pile. In order to resist the compressive force p, tensile force q, shear force t, and bending force b shown in FIG.

  The pile joint structure 1 to which the present invention is applied is formed in a spiral shape in a state where the lower flange 12 and the upper flange 13 are joined to each other by bolts, and has a predetermined length L4 in the axial direction X. In the direction X, it is configured to have a predetermined spiral pitch P4 having substantially the same length as the length L4, and is configured to have substantially the same spiral pitch as the spiral pitch P1 of the spiral blade 11. The pile joint structure 1 to which the present invention is applied is not limited to this, and may be configured by any spiral pitch P4, or may be a spiral pitch P4 longer than the spiral pitch P1 of the spiral blades 11. Since the joint structure 1 of the pile to which the present invention is applied is formed in a spiral shape, even if the joint part is provided on the ground, rainwater or the like can flow downward from the joint part. It is possible to avoid the joint portion from being rusted and corroded due to the rainwater being stored.

  Since the joint structure 1 of the pile to which the present invention is applied is that the lower flange 12 and the upper flange 13 are bolted by a mechanical flange joint, the upper end of the lower pile 2 is compared with the case of joining by welding. The part 2b and the lower end part 3a of the upper pile 3 can be joined in a short time, and can be firmly joined by a simple operation.

  As a result, the pile joint structure 1 to which the present invention is applied can shorten the construction period of pile driving and avoid an increase in the construction cost of pile driving.

  Further, the pile joint structure 1 to which the present invention is applied has a lower flange 12 formed so as to extend outward from the outer peripheral surface at the upper end portion 2b of the lower pile 2, and from the outer peripheral surface at the lower end portion 3a of the upper pile 3. An upper flange 13 is formed so as to extend outward. For this reason, the joint structure 1 of the pile which applied this invention avoids that the plate | board thickness of a lower pile 2 main body, an upper pile 3 main body, and a joint part increases toward an inner side, a lower pile 2 main body, an upper pile 3. It can avoid that the internal diameter of 3 main body and a joint part becomes small.

  Here, the rotary press-fit pile is generally constructed by an all-around swirler. In order to rotate the rotary press-fitting pile, this all-around swirler includes a chuck portion on which a spiral collar is formed that is inclined and grooved at the same spiral pitch as the spiral blade 11. At this time, the rotary press-fit pile is connected in the axial direction X above the chuck portion, but the pile joint structure 1 to which the present invention is applied uses a helical flange joint. Compared with the case where a flange joint perpendicular to the axial direction X is used, the joint portion can be easily passed through the spiral collar.

  The pile joint structure 1 to which the present invention is applied can use the hammaglab 19 shown in FIG. 12 having a large outer diameter inside the lower pile 2 and the upper pile 3, along with driving the lower pile 2 and the upper pile 3, The soil removal from the inside of the lower pile 2 and the upper pile 3 can be efficiently carried out by the hammer magnet 19. As a result, the pile joint structure 1 to which the present invention is applied can shorten the construction period of pile driving and avoid an increase in the construction cost of pile driving.

  A pile joint structure 1 to which the present invention is applied is formed in a spiral shape in a state where a lower flange 12 and an upper flange 13 are bolted. Thereby, the joint structure 1 of the pile to which the present invention is applied is the ground where the lower pile 2 and the upper pile 3 are integrally formed in a state where the upper end 2b of the lower pile 2 and the lower end 3a of the upper pile 3 are joined. When rotary press-fitting in, the rotary press-fit resistance of the pile joint structure 1 with respect to the traveling direction of the lower pile 2 and the upper pile 3 can be reduced. In particular, the pile joint structure 1 to which the present invention is applied is configured so that the spiral pitch P1 of the spiral blades 11 is substantially the same as the spiral pitch P4, thereby reducing the rotational press-fit resistance of the pile joint structure 1. Since it can be minimized, an increase in the load required for driving the lower pile 2 and the upper pile 3 can be suppressed, and it is possible to avoid an increase in the construction cost of driving the pile. It is possible to shorten the construction period of the driving.

  As shown in FIG. 13, the pile joint structure 1 to which the present invention is applied has a compressive force p, a tensile force q, and a portion where the upper end 2 b of the lower pile 2 and the lower end 3 a of the upper pile 3 are joined. A shearing force t acts. At this time, in the pile joint structure 1 to which the present invention is applied, since the lower flange 12 and the upper flange 13 are inclined with respect to the axial direction X, not only the lower flange 12 and the upper flange 13 but also the lower pile 2 The main body and the upper pile 3 main body can also bear a part of the compressive force p, tensile force q, and shear force t. Thereby, the pile joint structure 1 to which the present invention is applied can reduce the plate thickness T2 of the lower flange 12 and the plate thickness T3 of the upper flange 13, and further reduce the rotational press-fit resistance by the pile joint structure 1. Thus, it is possible to suppress an increase in the load required for driving the lower pile 2 and the upper pile 3.

  In the joint structure 1 of the pile to which the present invention is applied, since the lower flange 12 and the upper flange 13 are not perpendicular to the axial direction X, when a bending force b and a shearing force t are applied to the joint part, It is not necessary to bear all the bending force b and shear force t only at the joint portion. The pile joint structure 1 to which the present invention is applied has, for example, a bending force b and a shear force t ratio of 1: 9 to be borne by the joint portion, the lower pile 2 main body, and the upper pile 3 main body. b, part of the shear force t can be borne by the lower pile 2 main body and the upper pile 3 main body, and the strength against the bending force b and shear force t required for the joint portion can be set low. It becomes possible to easily design the portion.

  In the pile joint structure 1 to which the present invention is applied, the lower locking portion 14 and the upper locking portion 15 having a predetermined length in the axial direction X are locked to each other. For this reason, the pile joint structure 1 to which the present invention is applied transmits a part of the rotational force r from the lower locking portion 14 to the lower pile 2 main body and rotates from the upper locking portion 15 to the upper pile 3 main body. A part of the force r is transmitted, and the rotational force r acting on the bolt 16 that joins the lower flange 12 and the upper flange 13 can be reduced. As a result, the pile joint structure 1 to which the present invention is applied can reduce the quantity of bolts 16 and can use small-diameter bolts 16. It is possible to shorten the construction period of the material and to avoid an increase in material cost.

  As shown in FIG. 14, the pile joint structure 1 to which the present invention is applied is curved by forming the lower locking portion 14 curved and forming the upper locking portion 15 curved. When the lower locking portion 14 and the upper locking portion 15 are engaged and bite, it is possible to increase the resistance force against the compression force p and the tensile force q.

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

  As shown in FIG. 15, the pile joint structure 1 to which the present invention is applied is, as shown in FIG. 15, a lower flange 12 constituted by a predetermined helical pitch P <b> 2 includes a first lower flange 121 and a second lower flange. The upper flange 13 is divided into two parts 122 and a predetermined spiral pitch P3. The upper flange 13 is divided into two parts, a first upper flange 131 and a second upper flange 132. The pile joint structure 1 to which the present invention is applied is not limited to this, and may be divided into any quantity.

  In the second embodiment, the lower flange 12 has two lower locking portions 14 in the circumferential direction Z by notching a part of the upper end portion 2b of the lower pile 2 with a predetermined length h14 in the axial direction X. Is formed. Further, in the second embodiment, the upper flange 13 has two upper locking points in the circumferential direction Z by notching a part of the lower end portion 3a of the upper pile 3 with a predetermined length h15 in the axial direction X. Part 15 is formed.

  As shown in FIG. 16, the pile joint structure 1 to which the present invention is applied has a length h14 of the lower locking portion 14 and a length h15 of the upper locking portion 15 that are substantially the same length. The helical pitch P2 of the lower flange 12 that combines the lower flange 121 and the second lower flange 122 and the helical pitch P3 of the upper flange 13 that combines the first upper flange 131 and the second upper flange 132 are substantially the same. It is configured to have a helical pitch. For this reason, the pile joint structure 1 to which the present invention is applied has the upper surface 121a of the first lower flange 121 shown in FIG. 15 and the lower surface 131b of the first upper flange 131 shown in FIG. The upper surface 122a of the second lower flange 122 shown in FIG. 15 and the lower surface 132b of the second upper flange 132 shown in FIG. 15 are in surface contact with each other, and the axial direction X of the first lower flange 121 and the first upper flange 131 is In the axial direction X, the length L41 and the length L42 in the axial direction X of the second lower flange 122 and the second upper flange 132 are combined to be a predetermined length L4 in the axial direction X. A predetermined spiral pitch P4 having substantially the same length as the length L4 is formed.

  As in the first embodiment, the pile joint structure 1 to which the present invention is applied is bolted by a mechanical flange joint as in the first embodiment. It is possible to shorten the construction period of pile driving and to avoid an increase in the construction cost of pile driving.

  The pile joint structure 1 to which the present invention is applied is formed such that the lower flange 12 extends outward and the upper flange 13 extends outward. Thereby, the joint structure 1 of the pile which applied this invention can avoid that the plate | board thickness of a lower pile 2 main body, an upper pile 3 main body, and a joint part increases toward an inner side, and an internal diameter becomes small, By using the hammaglab 19 having a large outer diameter, it is possible to efficiently carry out the soil removal from the inside of the lower pile 2 and the upper pile 3.

  A pile joint structure 1 to which the present invention is applied is formed in a spiral shape with a lower flange 12 and an upper flange 13 bolted together, and the lower pile 2 and the upper pile 3 are integrally rotated and pressed into the ground. When this is done, the rotational press-fit resistance of the pile joint structure 1 can be reduced. In particular, the pile joint structure 1 to which the present invention is applied is configured so that the spiral pitch P1 of the spiral blades 11 is substantially the same as the spiral pitch P4, thereby reducing the rotational press-fit resistance of the pile joint structure 1. Minimization is possible. Thereby, the joint structure 1 of the pile which applied this invention can suppress the increase in the load required for driving of the lower pile 2 and the upper pile 3, and avoid that the construction cost of driving of the pile increases. It becomes possible to shorten the construction period of pile driving.

  As shown in FIG. 17, the pile joint structure 1 to which the present invention is applied is divided into a lower flange 12 and an upper flange 13, and a lower locking portion 14 having an arbitrary length in the axial direction X and an upper engagement. It will be in the state where the stop part 15 was mutually locked in two places of the circumferential direction Z. For this reason, the pile joint structure 1 to which the present invention is applied transmits a part of the rotational force r from the lower locking portion 14 to the lower pile 2 main body and rotates from the upper locking portion 15 to the upper pile 3 main body. A part of the force r is transmitted, and the rotational force r acting on the bolt 16 that joins the lower flange 12 and the upper flange 13 can be reduced. As a result, the pile joint structure 1 to which the present invention is applied can reduce the quantity of bolts 16 and can use small-diameter bolts 16. It is possible to shorten the construction period of the material and to avoid an increase in material cost.

  In the pile joint structure 1 to which the present invention is applied, the lower flange 12 and the upper flange 13 are inclined with respect to the axial direction X. Therefore, the compression force p, tensile force is applied to the lower pile 2 body and the upper pile 3 body. A part of the force q, the bending force b, and the shearing force t can be borne, and the joint portion can be easily designed. Further, the plate thickness T2 of the lower flange 12 and the plate thickness T3 of the upper flange 13 are provided. By reducing the thickness of the pile, the rotational press-fit resistance by the joint structure 1 of the pile can be further reduced, and an increase in the load required for driving the lower pile 2 and the upper pile 3 can be suppressed.

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

  In the third embodiment, the pile joint structure 1 to which the present invention is applied further has a convex portion 17a formed by projecting upward from the upper surface 12a of the lower flange 12, as shown in FIG. Moreover, the joint structure 1 of the pile to which this invention is applied WHEREIN: The bolt hole 13e of a part of upper flange 13 is used as the recessed part 17b in which the convex part 17a is inserted in 3rd Embodiment.

  The convex portion 17a is not limited to this, and may be formed so as to protrude downward from the lower surface 13b of the upper flange 13, and may be formed on one or both of the upper surface 12a of the lower flange 12 and the lower surface 13b of the upper flange 13. It may be formed. The convex portion 17a is formed in a substantially cylindrical shape, but is not limited thereto, and may be formed in a substantially prismatic shape. The convex portion 17a may be formed by forging the lower flange 12, or may be formed by being attached by stud welding to the upper surface 12a of the lower flange 12.

  The pile joint structure 1 to which the present invention is applied is configured so that the helical pitch P2 of the lower flange 12 and the helical pitch P3 of the upper flange 13 are substantially the same helical pitch, as shown in FIG. In the state where the upper surface 12a of the lower flange 12 shown in FIG. 18 and the lower surface 13b of the upper flange 13 shown in FIG. 18 are in surface contact with each other, the axial direction is set to a predetermined length L4 in the axial direction X. The convex portion 17a of the lower flange 12 is inserted into the concave portion 17b of the upper flange 13 while being configured to have a predetermined spiral pitch P4 that is substantially the same length as the length L4.

  The pile joint structure 1 to which the present invention is applied is also bolted by a mechanical flange joint in the third embodiment, so that it can be joined in a short time with a simple operation, and the work period of pile driving is reduced. It becomes possible to shorten, and it becomes possible to avoid that the construction cost of driving a pile increases.

  The pile joint structure 1 to which the present invention is applied is formed such that the lower flange 12 extends outward and the upper flange 13 extends outward. Thereby, the joint structure 1 of the pile which applied this invention can avoid that the plate | board thickness of a lower pile 2 main body, an upper pile 3 main body, and a joint part increases toward an inner side, and an internal diameter becomes small, By using the hammaglab 19 having a large outer diameter, it is possible to efficiently carry out the soil removal from the inside of the lower pile 2 and the upper pile 3.

  A pile joint structure 1 to which the present invention is applied is formed in a spiral shape with a lower flange 12 and an upper flange 13 bolted together, and the lower pile 2 and the upper pile 3 are integrally rotated and pressed into the ground. When this is done, the rotational press-fit resistance of the pile joint structure 1 can be reduced. In particular, the pile joint structure 1 to which the present invention is applied is configured so that the spiral pitch P1 of the spiral blades 11 is substantially the same as the spiral pitch P4, thereby reducing the rotational press-fit resistance of the pile joint structure 1. Minimization is possible. Thereby, the joint structure 1 of the pile which applied this invention can suppress the increase in the load required for driving of the lower pile 2 and the upper pile 3, and avoid that the construction cost of driving of the pile increases. It becomes possible to shorten the construction period of pile driving.

  The pile joint structure 1 to which the present invention is applied is in a state in which the convex portion 17a of the lower flange 12 is locked to the concave portion 17b of the upper flange 13 in the third embodiment. Therefore, in the pile joint structure 1 to which the present invention is applied, a part of the rotational force r is transmitted from the convex portion 17a of the lower flange 12 to the lower flange 12 and the upper flange 13, and the lower flange 12 and the upper flange 13 are connected. The rotational force r acting on the bolt 16 to be joined can be made small. As a result, the pile joint structure 1 to which the present invention is applied can reduce the number of bolts 16 with a small rotational force r acting on the bolts 16, reduce the amount of bolt fastening, and easily It can be joined in a short time with a simple operation, and the construction period of pile driving can be shortened.

  In the pile joint structure 1 to which the present invention is applied, the lower flange 12 and the upper flange 13 are inclined with respect to the axial direction X. Therefore, the compression force p, tensile force is applied to the lower pile 2 body and the upper pile 3 body. A part of the force q, the bending force b, and the shearing force t can be borne, and the joint portion can be easily designed. Further, the plate thickness T2 of the lower flange 12 and the plate thickness T3 of the upper flange 13 are provided. By reducing the thickness of the pile, the rotational press-fit resistance by the joint structure 1 of the pile can be further reduced, and an increase in the load required for driving the lower pile 2 and the upper pile 3 can be suppressed.

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

  As shown in FIG. 20, in the pile joint structure 1 to which the present invention is applied, as shown in FIG. 20, a lower groove 18 a in which an end surface on the upper surface 12 a side of the lower flange 12 is notched is further provided on the lower flange 12. An upper groove 18b formed in the side surface 12f and having an end surface on the lower surface 13b side of the upper flange 13 cut out is formed in the side surface 13f of the upper flange 13.

  As shown in FIG. 21, the lower groove 18a and the upper groove 18b are substantially rectangular in a state where the upper surface 12a of the lower flange 12 shown in FIG. 20 and the lower surface 13b of the upper flange 13 shown in FIG. The groove portion 18 formed in a shape is formed, and the key member 18c is installed in the lower groove 18a and the upper groove 18b, and the key member 18c is fixed to the groove portion 18 by fixing the key member 18c with a screw or the like. It is attached.

  The pile joint structure 1 to which the present invention is applied is configured such that the helical pitch P2 of the lower flange 12 and the helical pitch P3 of the upper flange 13 are substantially the same helical pitch. In the state where the upper surface 12a shown and the lower surface 13b shown in FIG. 20 of the upper flange 13 are in surface contact, the length L4 in the axial direction X is substantially equal to the predetermined length L4 in the axial direction X. It is comprised so that it may become the predetermined spiral pitch P4 of the same length.

  The pile joint structure 1 to which the present invention is applied is also bolt-bonded by a mechanical flange joint in the fourth embodiment, so that it can be joined in a short time with a simple operation, and the work period of pile driving is reduced. It becomes possible to shorten, and it becomes possible to avoid that the construction cost of driving a pile increases.

  The pile joint structure 1 to which the present invention is applied is formed such that the lower flange 12 extends outward and the upper flange 13 extends outward. Thereby, the joint structure 1 of the pile which applied this invention can avoid that the plate | board thickness of a lower pile 2 main body, an upper pile 3 main body, and a joint part increases toward an inner side, and an internal diameter becomes small, By using the hammaglab 19 having a large outer diameter, it is possible to efficiently carry out the soil removal from the inside of the lower pile 2 and the upper pile 3.

  A pile joint structure 1 to which the present invention is applied is formed in a spiral shape with a lower flange 12 and an upper flange 13 bolted together, and the lower pile 2 and the upper pile 3 are integrally rotated and pressed into the ground. When this is done, the rotational press-fit resistance of the pile joint structure 1 can be reduced. In particular, the pile joint structure 1 to which the present invention is applied is configured so that the spiral pitch P1 of the spiral blades 11 is substantially the same as the spiral pitch P4, thereby reducing the rotational press-fit resistance of the pile joint structure 1. Minimization is possible. Thereby, the joint structure 1 of the pile which applied this invention can suppress the increase in the load required for driving of the lower pile 2 and the upper pile 3, and avoid that the construction cost of driving of the pile increases. It becomes possible to shorten the construction period of pile driving.

  In the fourth embodiment, the pile joint structure 1 to which the present invention is applied is connected by a key member 18c locked to the lower groove 18a and the upper groove 18b. Therefore, in the pile joint structure 1 to which the present invention is applied, a part of the rotational force r is transmitted to the key member 18c, and the rotational force r acting on the bolt 16 that joins the lower flange 12 and the upper flange 13 is small. Can be. As a result, the pile joint structure 1 to which the present invention is applied can reduce the number of bolts 16 with a small rotational force r acting on the bolts 16, reduce the amount of bolt fastening, and easily It can be joined in a short time with a simple operation, and the construction period of pile driving can be shortened.

  In the pile joint structure 1 to which the present invention is applied, the lower flange 12 and the upper flange 13 are inclined with respect to the axial direction X. Therefore, the compression force p, tensile force is applied to the lower pile 2 body and the upper pile 3 body. A part of the force q, the bending force b, and the shearing force t can be borne, and the joint portion can be easily designed. Further, the plate thickness T2 of the lower flange 12 and the plate thickness T3 of the upper flange 13 are provided. By reducing the thickness of the pile, the rotational press-fit resistance by the joint structure 1 of the pile can be further reduced, and an increase in the load required for driving the lower pile 2 and the upper pile 3 can be suppressed.

  In any of the first to fourth embodiments, the pile joint structure 1 to which the present invention is applied includes any one of the start end portion 12c of the lower flange 12 and the start end portion 13c of the upper flange 13 as shown in FIG. Either or both of the end faces can be formed by sharpening.

  At this time, as shown in FIG. 22A, for example, the lower flange 12 and the upper flange 13 have an end surface of the start end portion 12c of the lower flange 12 and an end surface of the start end portion 13c of the upper flange 13 in the respective axial directions. It is sharpened by projecting the approximate center of X. Further, as shown in FIG. 22B, the lower flange 12 and the upper flange 13 project the upper end of the end surface of the start end portion 12c of the lower flange 12, and project the lower end of the end surface of the start end portion 13c of the upper flange 13. By doing so, these end surfaces may be sharpened. Furthermore, as shown in FIG. 22C, the lower flange 12 and the upper flange 13 project the lower end of the end face of the start end portion 13c of the upper flange 13, and the lower end and the lower end of the end face of the start end portion 13c of the upper flange 13 These end faces may be sharpened by making the upper end of the end face of the start end part 12c of the flange 12 continuous and projecting the lower end of the end face of the start end part 12c of the lower flange 12.

  Thereby, the pile joint structure 1 to which the present invention is applied is any one or both of the start end portion 12c of the lower flange 12 and the start end portion 13c of the upper flange 13 in any of the first to fourth embodiments. It becomes possible to remarkably reduce the rotational press-fit resistance of the joint structure 1 of the pile.

  In any one of the first to fourth embodiments, the pile joint structure 1 to which the present invention is applied has lower flanges 12 on the side surfaces of the lower pile 2 and the intermediate pile 4 as shown in FIG. While being attached by welding or the like, the upper flange 13 is attached to the side surfaces of the upper pile 3 or the intermediate pile 4 by welding or the like. The pile joint structure 1 to which the present invention is applied is not limited to this, and as shown in FIG. 23 (b), the lower flange 12 is attached to the upper end surfaces of the lower pile 2 and the intermediate pile 4 by welding or the like. The upper flange 13 may be attached to the lower end surface of the pile 3 or the intermediate pile 4 by welding or the like.

  In any of the first to fourth embodiments, the pile joint structure 1 to which the present invention is applied is shown in FIG. 24 and FIG. 25 with respect to any one or both of the lower flange 12 and the upper flange 13. The flange member 20 provided with the insertion portion 21 may be used. As shown in FIG. 24, the flange member 20 is provided with an insertion portion 21 having a predetermined length in the axial direction X extending along the inner peripheral surface of the pile. As shown in FIG. 25, the flange member 20 is fixed to the lower pile 2 main body, the upper pile 3 main body, and the intermediate pile 4 main body by inserting the insertion portion 21 inside the pile and attaching it by welding or the like.

  In any of the first to fourth embodiments, the pile joint structure 1 to which the present invention is applied is that the flange member 20 is used for either one or both of the lower flange 12 and the upper flange 13. When the flange member 20 is retrofitted, the insertion portion 21 functions as a guide, and positioning of the flange member 20 can be facilitated. As a result, the pile joint structure 1 to which the present invention is applied can facilitate positioning of the flange member 20 and ensure attachment work such as welding, even when the lower flange 12 and the upper flange 13 are spirally inclined. The flange member 20 can be retrofitted quickly and reliably.

  In any of the first to fourth embodiments, the pile joint structure 1 to which the present invention is applied is that the flange member 20 is used for either one or both of the lower flange 12 and the upper flange 13. The insertion portion 21 is provided along the inner peripheral surface of the pile. Thereby, the pile joint structure 1 to which the present invention is applied is a case where the pile main body is deformed even when the pile main body bears a part of the compressive force p, tensile force q and shearing force t shown in FIG. The pile main body can be partially reinforced with the insertion portion 21 of the flange member 20 so as not to be damaged.

  Next, a method for erecting a pile to which the present invention is applied will be described. The pile standing method to which the present invention is applied is carried out using the pile joint structure 1 to which the present invention is applied.

  As shown in FIG. 26, the pile standing method to which the present invention is applied connects the lower pile 2, any one or both of the upper pile 3 and the intermediate pile 4 in the axial direction X, and lower pile 2. Is driven into the ground until it reaches a predetermined depth, whereby the pile connected in the axial direction X is erected in the ground.

  The pile erection method to which the present invention is applied includes a press-fitting step of rotationally press-fitting the lower pile 2, the upper pile 3 and the intermediate pile 4 or both into the ground. In addition, as shown in FIG. 27, the pile erection method to which the present invention is applied is, as shown in FIG. It can be provided with a soil removal step for discharging the earth and sand collectively from the inside of either one or both of the piles 4. Furthermore, as shown in FIG. 28, the pile erection method to which the present invention is applied is, as shown in FIG. A reinforcing step of reinforcing the pile by injecting the time-curable material 22 into one or both of the piles 4 at once can be provided.

  In the press-fitting step, the upper surface 12a of the lower flange 12 shown in FIG. 7 and the lower surface 13b of the upper flange 13 shown in FIG. 9 are brought into surface contact, and the lower flange 12 and the upper flange 13 are joined to each other by bolting or the like. In this state, a rotational force r is applied to the upper pile 3 or the intermediate pile 4 as shown in FIG. Thereby, in a press-fit process, as shown in FIG.26 (b), the lower pile 2, the upper pile 3, and the intermediate | middle pile 4 are rotationally press-fitted in the ground integrally, and are erected.

  In the earth removal process, as shown in FIG. 27 (a), the lower pile 2, the upper pile 3 and the intermediate pile 4 are rotated and press-fitted into the ground as a whole. The earth and sand are discharged from the inside by the hammaglab 19 or the like. Thereby, in a soil removal process, as shown in FIG.27 (b), earth and sand will be discharged | emitted collectively from the lower pile 2, the upper pile 3, and the intermediate | middle pile 4 inside.

  In the reinforcing process, as shown in FIG. 28 (a), the lower pile 2, the upper pile 3 and the intermediate pile 4 are integrally hollowed into the ground, and the lower part is substantially hollow after the earth removal process. A time curable material 22 such as concrete is injected into the inside of the pile 2, the upper pile 3 and the intermediate pile 4. In the reinforcement step, the time-curable material 22 may be cured by using the earth and sand remaining inside the pile in the press-fitting step without passing through the soil removal step. As a result, in the reinforcing step, as shown in FIG. 28 (b), the time-curable material 22 is injected and filled all together inside the lower pile 2, the upper pile 3, and the intermediate pile 4, and this time-curable property is increased. As the material 22 hardens, the lower pile 2, the upper pile 3, and the intermediate pile 4 are integrally reinforced.

  As shown in FIG. 26, the pile standing method to which the present invention is applied is formed in a spiral shape with the lower flange 12 and the upper flange 13 joined together. And the rotation press-fit resistance of the joint structure 1 of the pile which integrated the intermediate pile 4 can be made small. As a result, the pile erection method to which the present invention is applied is configured to rotate a plurality of piles together while suppressing an increase in the rotational force r required for driving the lower pile 2 and the upper pile 3 in the press-fitting process. It is possible to press-fit, and it is possible to reduce the trouble of repeating the rotary press-fitting work and the joining work of the pile alternately.

  As shown in FIG. 27, the pile erection method to which the present invention is applied is that the lower pile 2, the upper pile 3 and the intermediate pile 4 are connected in the soil removal process, and the earth and sand are discharged collectively from the inside. Therefore, it is possible to reduce the trouble of repeating the earth and sand discharging work and the pile joining work alternately. In addition, as shown in FIG. 28, the pile erection method to which the present invention is applied is such that the lower pile 2, the upper pile 3 and the intermediate pile 4 are connected in the reinforcement step and collectively aged over time inside these materials. Since 22 can be injected, it is possible to reduce the trouble of alternately repeating the injection work of the time-curable material 22 and the joining work of the piles.

  In the pile joint structure 1 to which the present invention is applied, the lower flange 12 and the upper flange 13 are formed so as to extend outward from the outer peripheral surfaces of the lower pile 2, the upper pile 3, and the intermediate pile 4, as shown in FIG. Therefore, it can avoid that the internal diameter of a pile main body or a joint part becomes small. As a result, the pile joint structure 1 to which the present invention is applied increases the inner diameter of the pile main body and the joint portion, so that in the press-fitting process of the pile standing method to which the present invention is applied, the lower pile 2 and the upper pile 3 And the movement of the earth and sand inside the intermediate pile 4 can be made smooth, and the rotary press-fitting work of the pile can be easily performed.

  As shown in FIG. 27, the pile joint structure 1 to which the present invention is applied is a lower pile in the soil removal process of the pile standing method to which the present invention is applied by increasing the inner diameter of the pile body and the joint portion. 2. The hammaglab 19 having a large outer diameter can be used on the inner side of the upper pile 3 and the intermediate pile 4, so that the earth and sand can be discharged efficiently. As shown in FIG. 28, the pile joint structure 1 to which the present invention is applied is configured to increase the inner diameter of the pile main body and the joint portion, thereby lowering the lower pile 2 in the reinforcing step of the pile standing method to which the present invention is applied. In addition, the passage of the joint portion of the time-curable material 22 inside the upper pile 3 and the intermediate pile 4 is facilitated, and the filling operation of the time-curable material 22 can be easily performed.

  In addition, the pile joint structure 1 to which the present invention is applied, as shown in FIG. 25, the flange member 20 is used for either one or both of the lower flange 12 and the upper flange 13, so that the inner peripheral surface of the pile is used. The insertion part 21 of the flange member 20 is provided along. Thereby, the pile joint structure 1 to which the present invention is applied is such that the insertion portion 21 of the flange member 20 protrudes at a certain height from the inner peripheral surface of the pile, and the lower pile 2, the upper pile 3, and the intermediate pile 4 It is possible to improve the adhesion performance of the cured time-curable material 22 on the inside.

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

  For example, the pile joint structure 1 to which the present invention is applied has been described in detail with respect to an example in which the spiral blade 11 and the spiral blade 11 are formed in a left-turned spiral shape from the top to the bottom. Together with the blades 11, it may be formed in a spiral shape that rotates clockwise from above to below. The pile joint structure 1 to which the present invention is applied includes a rotary pierced steel pipe pile with a tip wing provided with a tip wing divided into two to three in the circumferential direction of the pile, and an inclined plate divided into two in the circumferential direction of the pile. You may use for a closed-end type steel pipe pile provided with a tip wing.

1: Pile joint structure 2: Lower pile 2a: Lower end (lower pile)
2b: Upper end (lower pile)
2c: Middle part (lower pile)
3: Upper pile 3a: Lower end (upper pile)
3b: Upper end (upper pile)
3c: Middle part (upper pile)
4: Intermediate pile 4a: Lower end (intermediate pile)
4b: Upper end (intermediate pile)
4c: Intermediate part (intermediate pile)
11: Spiral blade 11a: Upper surface (spiral blade)
11b: Lower surface (spiral blade)
11c: Start end (spiral blade)
11d: Terminal part (spiral blade)
12: Lower flange 12a: Upper surface (lower flange)
12b: bottom surface (lower flange)
12c: Start end (lower flange)
12d: Terminal part (lower flange)
12e: Bolt hole (lower flange)
12f: Side surface (lower flange)
121: First lower flange 121a: Upper surface (first lower flange)
122: Second lower flange 122a: Upper surface (second lower flange)
13: Upper flange 13a: Upper surface (upper flange)
13b: bottom surface (upper flange)
13c: Start end (upper flange)
13d: Terminal part (upper flange)
13e: Bolt hole (upper flange)
13f: Side surface (upper flange)
131: First upper flange 131b: Lower surface (first upper flange)
132: Second upper flange 132b: Lower surface (first upper flange)
14: Lower locking portion 15: Upper locking portion 16: Bolt 17a: Convex portion 17b: Recessed portion 18: Groove portion 18a: Lower groove 18b: Upper groove 18c: Key member 19: Hammaglab 20: Flange member 21: Insertion portion 22: Temporarily curable material P1: Spiral pitch (spiral blade)
P2: Spiral pitch (lower flange)
P3: Spiral pitch (upper flange)
P4: Spiral pitch (pile joint structure)
T1: Thickness (spiral blade)
T2: Plate thickness (lower flange)
T3: Plate thickness (upper flange)
X: axial direction Y: axial orthogonal direction Z: circumferential direction p: compression force q: tensile force r: rotational force t: shear force b: bending force

Claims (8)

A pile joint structure for connecting another pile to a pile provided with a spiral blade at either one or both of the lower end portion and the intermediate portion,
A lower flange formed to extend outward from the outer peripheral surface at the upper end of the lower pile or intermediate pile, and an upper flange formed to extend outward from the outer peripheral surface at the lower end of the upper pile or intermediate pile,
The lower flange and the upper flange are formed in a spiral shape, and are joined to each other with the upper surface of the lower flange and the lower surface of the upper flange in surface contact with each other,
The width in the direction perpendicular to the axis of the lower flange and the width in the direction perpendicular to the axis of the upper flange are formed smaller than the width in the direction perpendicular to the axis of the spiral blade ,
The lower flange and the upper flange are connected to each other, and the rotational force due to the rotary press-fitting of the pile and the compression force and / or the tensile force acting in the axial direction are applied to the upper end of the lower pile. And from the lower locking part and the upper locking part which are the end faces of the pile having a predetermined length in the axial direction from the terminal end of the spiral blade at the lower end of the upper pile, so that it can be transmitted to the pile body, joint structure of piles which the lower locking portion which is curved to each other and said upper anchor portion is characterized Rukoto engaged to bite engaged with each other. The lower flange and the upper flange are partly cut out in the circumferential direction, and are formed in a spiral shape with a spiral pitch substantially the same as the spiral pitch of the spiral blade provided in the lower pile. The pile joint structure according to claim 1, wherein   The lower flange and the upper flange are each formed with a bolt hole, and are bolt-bonded in a state where the upper surface of the lower flange and the lower surface of the upper flange are in surface contact with each other. Or the joint structure of the pile of 2 description. The lower flange and the upper flange are formed by projecting in a vertical direction on one or both of the upper surface of the lower flange and the lower surface of the upper flange, the upper surface of the lower flange, and the upper flange The pile joint structure according to any one of claims 1 to 3, further comprising: a concave portion into which the convex portion is inserted in a state where the lower surface of the pile is in surface contact. In the lower flange and the upper flange, a lower groove in which an end surface on the upper surface side is notched is formed on a side surface of the lower flange, and an upper groove in which an end surface on the lower surface side is notched is formed on a side surface of the upper flange. The key member is constructed in the lower groove and the upper groove in a state where the upper surface of the lower flange and the lower surface of the upper flange are in surface contact with each other. The pile joint structure according to any one of the preceding claims. It is a standing method of a pile in which other piles are connected to a pile provided with spiral blades at either one or both of the lower end part and the intermediate part, and standing in the ground,
A lower flange that extends outwardly from the outer peripheral surface at the upper end of the lower pile or the intermediate pile and is formed in a spiral shape and has a width in the direction perpendicular to the axial center smaller than the width in the direction perpendicular to the axial center of the spiral blade; The upper flange is formed in a spiral shape extending outward from the outer peripheral surface at the lower end of the upper pile or the intermediate pile, and the width in the direction perpendicular to the axis is smaller than the width in the direction perpendicular to the axis of the spiral blade In a state where the upper surface of the lower flange and the lower surface of the upper flange are brought into surface contact with each other, the rotational force due to the rotary press-fitting of the pile, and the compressive force and tensile force acting in the axial direction. Either one or both from the lower locking portion and the upper locking portion, which are end surfaces of the pile having a predetermined length in the axial direction from the terminal end of the spiral blade at the upper end of the lower pile and the lower end of the upper pile , So that it can be transmitted to the pile body There curved with the lower locking portion and the upper locking portion is engaged as bite engage mutually, ground in either one or both of the lower pile and the upper pile and intermediate pile together A method for erecting a pile characterized by comprising a press-fitting step of rotary press-fitting into the pile. After the press-fitting step, it further comprises a soil discharging step of discharging earth and sand from the inside of any one or both of the lower pile, the upper pile and the intermediate pile that are rotationally press-fitted into the ground. The method for erecting a pile according to claim 6 . After the press-fitting step, the time-hardening material is injected into the inner side of one or both of the lower pile, the upper pile, and the intermediate pile that are integrally rotationally press-fitted into the ground to reinforce the pile. A method for erecting a pile according to claim 6 or 7, further comprising a reinforcing step.

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