WO2015083807A1 - 鋼管杭の継手構造 - Google Patents

鋼管杭の継手構造 Download PDF

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Publication number
WO2015083807A1
WO2015083807A1 PCT/JP2014/082168 JP2014082168W WO2015083807A1 WO 2015083807 A1 WO2015083807 A1 WO 2015083807A1 JP 2014082168 W JP2014082168 W JP 2014082168W WO 2015083807 A1 WO2015083807 A1 WO 2015083807A1
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WO
WIPO (PCT)
Prior art keywords
fitting
steel pipe
pipe pile
outer fitting
joint structure
Prior art date
Application number
PCT/JP2014/082168
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
弘信 松宮
雅司 北濱
妙中　真治
津留　英司
惟史 望月
義法 小林
俊彦 坂本
Original Assignee
新日鐵住金株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 新日鐵住金株式会社 filed Critical 新日鐵住金株式会社
Priority to KR1020167010198A priority Critical patent/KR101879964B1/ko
Priority to SG11201601933PA priority patent/SG11201601933PA/en
Priority to AU2014358146A priority patent/AU2014358146B2/en
Priority to CN201480057909.9A priority patent/CN105658876A/zh
Priority to JP2015551567A priority patent/JP6202102B2/ja
Publication of WO2015083807A1 publication Critical patent/WO2015083807A1/ja
Priority to PH12016500755A priority patent/PH12016500755A1/en
Priority to HK16112254.8A priority patent/HK1223992A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
    • E02D5/523—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
    • E02D5/523—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
    • E02D5/526—Connection means between pile segments

Definitions

  • the present invention relates to a joint structure of steel pipe piles for connecting a first steel pipe pile and a second steel pipe pile in the axial direction.
  • welded joints and mechanical joints have been used as joint structures for connecting the first steel pipe pile and the second steel pipe pile in the axial direction.
  • a welded joint is obtained by abutting and welding the first steel pipe pile and the second steel pipe pile at their ends.
  • the joint structure by the welded joint has a difficulty in workability, and the quality and working time of the welded part greatly depend on the field environment and the skill level of the worker.
  • Patent Document 1 and Patent Document 2 a steel pipe pile joint structure using a mechanical joint as disclosed in Patent Document 1 and Patent Document 2 has been proposed as a steel pipe pile joint structure excellent in workability.
  • a pair of externally fitted end portions and internally fitted end portions that can be fitted to each other are formed on the first pile and the second pile adjacent to each other in the axial direction. Is done. Then, the engaging portion and the engaged portion that are engaged with each other by being relatively rotated around the axis center in a state where the inner fitting end portion is inserted into the outer fitting end portion are the outer fitting end portion and the inner fitting end. Formed in the part.
  • the joint structure of the steel pipe pile disclosed in Patent Document 1 is a separation preventing means for preventing the engaged engagement portion and the engaged portion from separating in the radial direction of the first pile or the second pile. Are provided at the engaging portion and the engaged portion.
  • a pair of externally fitted end portions and internally fitted end portions that can be fitted to each other are formed on the first pile and the second pile adjacent to each other in the axial direction. Is done. Then, in a state where the inner fitting end is inserted into the outer fitting end, the engaging convex portion and the engaged convex portion that are engaged with each other by rotating around the axial center are formed between the outer fitting end portion and the inner fitting end. A plurality of end portions are formed in the axial direction.
  • the formation position of the engagement convex portion provided on the base end side is closer to the formation portion of the engagement convex portion provided with the outer fitting end portion on the distal end side. It is formed to have a large diameter, and the inner fitting end portion is formed to have a smaller diameter than the formation portion of the engaged convex portion provided on the proximal end side as the formation portion of the engaged convex portion provided on the distal end side.
  • the tensile force transmitted to the engaged convex portion decreases from the proximal end side to the distal end side of the outer fitting end portion and the inner fitting end portion.
  • the thickness of the engaged convex portion is gradually reduced from the base end side toward the front end side.
  • the plate thickness of the engaged convex portion is reduced on the distal end side of the outer fitting end portion and the inner fitting end portion, so that the outer fitting end portion and the inner fitting end portion are reduced.
  • the compressive proof stress of the engaged convex portion is reduced at the distal end side of the fitting end portion, and the engaged convex portion is buckled and deformed.
  • the present invention has been devised in view of the above-described problems, and the object of the present invention is to increase the material cost by reducing the thickness of the outer fitting end portion and the distal end side of the inner fitting end portion. It is providing the joint structure of the steel pipe pile which can prevent buckling deformation of the thinnest part of the front end side while suppressing.
  • a first aspect of the present invention is a joint structure of steel pipe piles that connects the first steel pipe pile and the second steel pipe pile coaxially.
  • the steel pipe pile joint structure is provided in the first steel pipe pile, and an outer fitting end portion in which a plurality of outer fitting step portions are formed along the extending direction of the first axis of the first steel pipe pile;
  • An inner fitting end portion provided on the second steel pipe pile and formed with a plurality of inner fitting step portions along the extending direction of the second axis of the second steel pipe pile, and the plurality of outer fittings.
  • Each of the stepped portions protrudes in a direction toward the first axis and a plurality of outer fitting mountain portions formed in the circumferential direction around the first axis, and each of the outer fitting mountain portions adjacent to each other.
  • a plurality of internal fitting steps each including an external fitting groove portion formed between the outer fitting groove portions and an outer fitting valley portion formed adjacent to each of the outer fitting mountain portions and close to the first steel pipe pile.
  • Each of the portions protrudes in a direction away from the second axis and a plurality of internally fitted mountain portions formed in the circumferential direction around the second axis are adjacent to each other.
  • the outer fitting step portion closer to the first steel pipe pile has a larger plate thickness of the outer fitting valley portion, and the plurality of inner fitting step portions are closer to the second steel pipe pile.
  • the thickness of the inner fitting valley portion is increased as the inner fitting stepped portion is formed, and the inner fitting end is inserted into the outer fitting end portion and relatively rotated to be fitted.
  • the internal fitting front end surface on the front end side of the part and the opposing surface of the internal fitting front end surface are separated by a predetermined separation distance D, and between the plurality of outer fitting stepped portions and the plurality of inner fitting stepped portions.
  • the total area of the tension side contact surfaces that bear the tensile force is the same as the area of the outer fitting front end surface of the outer fitting end that bears the compressive force and the compressive force. You Is less than or equal to the total area of the total area of the compression-side contact surface.
  • the total area of the tension side contact surface may be equal to or less than the total area of the compression side contact surface.
  • the predetermined separation distance D may satisfy the following formula (A).
  • the protrusion heights of the internally fitted mountain portions in the plurality of internally fitted stepped portions, At least one of the projecting heights of the outer fitting mountain portion in the outer fitting step portion may be substantially the same.
  • the opposing surface of the inner fitting distal end surface is an outer fitting on the proximal end side of the outer fitting end portion. It may be a base end face.
  • the facing surface of the inner fitting front end surface may be an end surface of the first steel pipe pile.
  • the outer fitting valley portion has a larger plate thickness as the outer fitting stepped portion is closer to the first steel pipe pile.
  • the plurality of internally fitted step portions have a configuration in which the plate thickness of the internally fitted valley portion is increased as the inner fitted step portion is closer to the second steel pipe pile. Therefore, since the plate thickness at the distal end side where the tensile force and compressive force transmitted compared to the proximal end side are small is reasonably reduced, the increase in material cost is suppressed, and at the same time, the thinnest outer fitting portion and The buckling deformation of the thinnest inner fitting can be prevented.
  • the tip of the inner fitting end portion is inserted in the outer fitting end portion and is coaxially rotated and fitted.
  • the inner fitting front end surface and the opposite surface of the inner fitting front end surface are separated by a predetermined separation distance D. Therefore, since it is possible to prevent the compressive force from the opposing surface from being transmitted to the inner fitting front end surface, it is possible to prevent buckling deformation of the thinnest inner fitting portion that is easily deformed when the compressive force is applied.
  • the total area of the side abutment surface is equal to or less than the total area of the area of the front end of the external fitting end that bears the compression force and the total area of the compression side abutment that bears the compression force. . Therefore, even if the thinnest part of the outer fitting is buckled and the compressive force that can be borne by the outer fitting front end surface becomes small, the compression side abutment surface of the remaining step part resists the compressive force. be able to. For this reason, it becomes possible to hold
  • the separation distance D is set so as to satisfy the above formula (A). Therefore, even when the joint structure of the steel pipe pile is bent and deformed, the compressive force from the facing surface is not transmitted to the inner fitting front end surface, so that the buckling of the thinnest part of the inner fitting that easily deforms when compressive force is applied.
  • the opposing surface of the inner fitting front end surface is the outer fitting base end surface on the base end side of the outer fitting end portion or the end surface of the first steel pipe pile. Structural design can be adopted.
  • a steel pipe pile joint structure 7 according to an embodiment of the present invention (hereinafter, sometimes referred to as a joint structure 7 according to the present embodiment or simply a joint structure 7) will be described in detail with reference to the drawings.
  • the axial direction of the steel pipe pile is defined as the axial direction Y
  • the direction orthogonal to the axial direction Y is the axial orthogonal direction X
  • the direction around the axial center of the steel pipe pile is the circumferential direction W.
  • the joint structure 7 includes a first steel pipe pile 1 having a first axial center and a substantially circular cross section as shown in FIG. 1 in a foundation pile or the like of a structure constructed on the ground,
  • the second steel pipe pile 2 having a second axial center and having a substantially circular cross section is provided as a mechanical joint that connects coaxially (axial direction Y).
  • the outer fitting end portion 3 in which a plurality of outer fitting step portions 4 are formed along the axial direction Y is joined to the upper end portion of the first steel pipe pile 1 by welding or the like.
  • An inner fitting end portion 5 in which a plurality of inner fitting step portions 6 are formed along the axial direction Y is joined to the lower end portion of the second steel pipe pile 2 by welding or the like.
  • the outer fitting end portion 3 and the inner fitting end portion 5 have a structure that can be fitted to each other.
  • Each of the plurality of outer fitting step portions 4 formed on the outer fitting end portion 3 protrudes in the direction toward the axis and is formed with a plurality of outer fitting mountain portions 31 formed in the circumferential direction W, and in the circumferential direction W.
  • the fitting groove part 32 and the fitting valley part 33 are formed with the same plate thickness so as to be flush with each other as shown in FIG. From the viewpoint of In the joint structure 7 according to the present embodiment, as shown in FIG. 1, four outer fitting mountain portions 31 are formed at predetermined intervals in the circumferential direction W with respect to each of the plurality of outer fitting step portions 4.
  • the present invention is not limited to this structure.
  • Each of the plurality of inner fitting stepped portions 6 formed in the inner fitting end portion 5 protrudes in a direction away from the axial center and has a plurality of inner fitting mountain portions 51 formed in the circumferential direction W, and in the circumferential direction W.
  • Internal fitting groove portions 52 formed between the respective internal fitting mountain portions 51 adjacent to each other, and an internal fitting valley formed on the proximal end side adjacent to each internal fitting mountain portion 51 and close to the second steel pipe pile. Part 53.
  • the internal fitting groove part 52 and the internal fitting valley part 53 are formed with the same plate thickness so as to be flush with each other, as shown in FIG. From the viewpoint of In the joint structure 7 according to the present embodiment, as shown in FIG. 1, four inner fitting mountain portions 51 are formed at predetermined intervals in the circumferential direction W with respect to each of the plurality of inner fitting step portions 6.
  • the present invention is not limited to this structure.
  • a rotation inhibiting key for inhibiting relative rotation after fitting between the outer fitting end portion 3 and the inner fitting end portion 5 is inserted.
  • four key grooves P are formed in the circumferential direction W, the key grooves need not be formed.
  • the outer fitting end portion 3 includes the first outer fitting step portion 41, the second outer fitting step portion 42, and the third outer fitting in order from the distal end side to the proximal end side in the axial direction Y of the outer fitting end portion 3.
  • a step portion 43 and a fourth outer fitting step portion 44 are provided.
  • each outer fitting step part 4 the thickness of the outer fitting groove part 32 is made smaller than the thickness of the outer fitting mountain part 31, and the outer fitting mountain part 31 and the outer fitting groove part 32 are alternately formed in the circumferential direction W.
  • the And the external fitting peak part 31 of the some external fitting step part 4 is arrange
  • the plate thickness of the external fitting valley part 33 is made smaller than the plate thickness of the external fitting mountain part 31, and the external fitting mountain part 31 and the external fitting valley part 33 are axial directions. Alternatingly formed with Y.
  • the plate thickness of the external fitting valley portion 33 is formed to be larger as the external fitting step portion 4 is closer to the proximal end side of the external fitting end portion 3. That is, the plate thickness of the external fitting valley portion 33 of the first external fitting step portion 41 is smaller than the plate thickness of the external fitting valley portion 33 of the second external fitting step portion 42, and the external fitting of the second external fitting step portion 42 is performed.
  • the plate thickness of the valley portion 33 is smaller than the plate thickness of the external fitting valley portion 33 of the third external fitting step portion 43, and the plate thickness of the external fitting valley portion 33 of the third external fitting step portion 43 is the fourth external fitting. It is formed to be smaller than the plate thickness of the outer fitting valley portion 33 of the step portion 44.
  • the outer fitting valley portion 33 of the first outer fitting step portion 41 is formed as the outer fitting thinnest portion 30 having the smallest plate thickness among the outer fitting end portions 3, and the outer fitting mountain portion of the first outer fitting step portion 41.
  • An outer fitting front end surface 34 is formed in a substantially flat shape on the front end side in the axial direction Y of 31.
  • an extra fitting extra length portion 45 is formed on the proximal end side in the axial direction Y of the outer fitting valley portion 33 of the fourth outer fitting step portion 44.
  • An outer fitting base end face 35 is formed over the entire circumference at the distal end side of the outer fitting extra length portion 45.
  • the inner fitting end portion 5 includes the first inner fitting step portion 61, the second inner fitting step portion 62, and the third inner fitting portion in order from the distal end side to the proximal end side in the axial direction Y of the inner fitting end portion 5.
  • a step portion 63 and a fourth internal fitting step portion 64 are provided.
  • each internal fitting step portion 6 the thickness of the internal fitting groove portion 52 is made smaller than the thickness of the internal fitting mountain portion 51, and the internal fitting mountain portions 51 and the internal fitting groove portions 52 are alternately formed in the circumferential direction W.
  • the And the internal fitting mountain part 51 of the some internal fitting step part 6 is arrange
  • the plate thickness of the internal fitting valley part 53 is made smaller than the plate thickness of the internal fitting mountain part 51, and the internal fitting mountain part 51 and the internal fitting valley part 53 are axial direction. Alternatingly formed with Y.
  • the plate thickness of the internal fitting valley portion 53 is formed to be larger as the internal fitting step portion closer to the proximal end side of the internal fitting end portion 5. That is, the plate thickness of the internal fitting valley portion 53 of the first internal fitting step portion 61 is smaller than the plate thickness of the internal fitting valley portion 53 of the second internal fitting step portion 62, and the internal fitting of the second internal fitting step portion 62.
  • the plate thickness of the valley portion 53 is smaller than the plate thickness of the internal fitting valley portion 53 of the third internal fitting step portion 63, and the plate thickness of the internal fitting valley portion 53 of the third internal fitting step portion 63 is the fourth internal fitting. It is formed smaller than the plate thickness of the internal fitting valley portion 53 of the step portion 64.
  • the inner fitting valley portion 53 of the first inner fitting step portion 61 is formed as the inner fitting thinnest portion 50 having the smallest plate thickness among the inner fitting end portions 5, and the inner fitting mountain portion of the first inner fitting step portion 61.
  • An inner fitting front end face 54 is formed in a substantially flat shape on the front end side in the axial direction Y of 51.
  • an inner fitting surplus length portion 65 is formed on the proximal end side in the axial direction Y of the inner fitting valley portion 53 of the fourth inner fitting step portion 64.
  • An inner fitting base end face 55 is formed over the entire circumference on the distal end side of the inner fitting surplus length portion 65.
  • FIG. 7 is a perspective view showing a state in which a part of the external fitting end 3 is cut.
  • the inner fitting end portion 5 attached to the second steel pipe pile 2 is inserted into the outer fitting end portion 3 attached to the first steel pipe pile 1.
  • the height of the inner fitting mountain part 51 in the axial center orthogonal direction X is set to be equal to or less than the depth of the outer fitting groove part 32 corresponding to the fitting time in the axial center orthogonal direction X.
  • the inner fitting mountain portion 51 can pass through the outer fitting groove portion 32.
  • the first steel pipe pile 1 and the second steel pipe pile 2 are relatively rotated in the circumferential direction W around the axis center with the inner fitting end 5 inserted into the outer fitting end 3.
  • the depth of the inner fitting valley portion 53 in the axial center orthogonal direction X is designed to be greater than the height of the outer fitting mountain portion 31 corresponding to the fitting in the axial center orthogonal direction X. Thereby, it becomes a structure which can fit the external fitting mountain part 31 to the internal fitting trough part 53.
  • FIG. 8 is a schematic cross-sectional view showing a state in which the inner fitting end portion 5 of the joint structure 7 according to the present embodiment is inserted into the outer fitting end portion 3 and is relatively rotated.
  • the joint structure 7 has an outer fitting in which an outer fitting distal end surface 34 on the distal end side of the outer fitting end portion 3 and an inner fitting proximal end surface 55 on the proximal end side of the inner fitting end portion 5 face each other. It has the opposing part 36, the internal fitting front end surface 54 of the front end side of the internal fitting end part 5, and the internal fitting opposing part 56 which the external fitting base end surface 35 of the base end side of the external fitting end part 3 opposes.
  • the outer fitting step portion 4 (the first outer fitting step portion 41, the second outer fitting step portion 42, the third outer fitting step portion 43) excluding the fourth outer fitting step portion 44 and the first inner portion.
  • the inner fitting step portion 6 (fourth inner fitting step portion 64, third inner fitting step portion 63, second inner fitting step portion 62) excluding the fitting step portion 61, the length of the inner fitting mountain portion 51 in the axial direction Y
  • the length of the external fitting valley portion 33 corresponding to the fitting time in the axial direction Y is designed to be substantially the same as the length of the external fitting mountain portion 31 in the axial direction Y. It is designed to be approximately equal to the length of the fitting valley portion 53 in the axial direction Y. Thereby, it is possible to engage the outer fitting mountain portion 31 and the inner fitting mountain portion 51 in the axial direction Y.
  • the length in the axial direction Y of the inner fitting mountain portion 51 is the axial center of the outer fitting valley portion 33, as shown in FIG. It is designed to be smaller than the length in the direction Y.
  • the inner fitting front end surface 54 and the outer fitting base end surface 35 which is the opposite surface are separated by a predetermined separation distance D (mm) at the inner fitting facing portion 56, and the inner fitting facing portion 56 is separated from the inner fitting facing portion 56.
  • An internal fitting gap 57 is formed.
  • FIG. 9 is a schematic cross-sectional view showing a steel pipe pile joint structure 107 according to a first modification of the present invention.
  • the plate thickness of the external fitting extra length portion 45 is set to be equal to the plate thickness of the external fitting valley portion 33 of the fourth external fitting step portion 44.
  • the facing surface of the inner fitting front end surface 54 is the end surface of the first steel pipe pile 1. Therefore, when the inner fitting front end surface 54 and the end surface of the first steel pipe pile 1 which is the opposite surface are separated by a predetermined separation distance D (mm) in the inner fitting facing portion 56, An internal fitting gap 157 is formed.
  • the separation distance D (mm) between the internal fitting gaps 57 and 157 may be more than 0 mm.
  • the separation distance D (mm) is expressed by the following formula (1). It is preferable to set so as to satisfy.
  • the above formula (1) is a formula derived on the assumption of bending deformation in which the connection point between the thinnest inner fitting portion 50 and the inner fitting mountain portion 51 is the bending center point C. That is, by setting the separation distance D (mm) so as to satisfy the above formula (1), it is ensured that the inner fitting front end surface 54 comes into contact with the facing surface even when the steel pipe pile is bent and deformed. It can be avoided.
  • FIG. 11 is a cross-sectional view of an essential part showing a joint structure 207 according to a second modification of the present invention.
  • the outer fitting gap 37 is formed in the outer fitting facing portion 36 as well as the inner fitting facing portion 56.
  • the plate thickness of the internal fitting extra length portion 65 may be set to be equal to the plate thickness of the internal fitting valley portion 53 of the fourth internal fitting step portion 64.
  • the opposing surface of the outer fitting front end surface 34 is the end surface of the second steel pipe pile 2.
  • the separation distance D ′ (mm) of the external fitting gap 37 may be more than 0 mm, and may be set so as to satisfy the following formula (2).
  • the buckling deformation preventing effect obtained by providing the outer fitting gap 37 is smaller than the buckling deformation preventing effect obtained by providing the inner fitting gap 57.
  • the contact surface 8 of the joint structure 7 according to this embodiment will be described.
  • the inner fitting end portion 5 is inserted into the outer fitting end portion 3 and is relatively rotated, so that the outer fitting step portion 4 and the inner fitting step portion 6 have an outer fitting mountain portion.
  • a contact surface 8 is formed in which 31 and the internally fitted mountain portion 51 are in contact with each other in the axial direction Y.
  • the first steel pipe pile 1 and the second steel pipe pile 2 are connected, the first steel pipe pile 1 and the second steel pipe pile 2 are pulled in the axial direction Y from the outer fitting end 3 and the inner fitting end 5.
  • the outer fitting mountain portion 31 and the inner fitting mountain portion 51 resist the tensile force and the compressive force acting in the axial direction Y at the contact surface 8 in the axial direction Y. .
  • the outer fitting mountain portion 31 and the inner fitting mountain portion 51 come into contact with each other in each of the outer fitting step portion 4 and the inner fitting step portion 6.
  • the proximal end side of the outer fitting end portion 3 and the proximal end side of the inner fitting end portion 5 are tensile side contact surfaces 81 that bear a tensile force.
  • the outer fitting mountain portion 31 of the first outer fitting step portion 41 and the inner fitting mountain portion 51 of the fourth inner fitting step portion 64 are pulled by the pull side contact surface 81.
  • the outer fitting mountain portion 31 of the second outer fitting step portion 42 and the inner fitting mountain portion 51 of the third inner fitting step portion 63 have a tensile area At2 at the tension side contact surface 81, and have an area At1.
  • the outer fitting mountain portion 31 of the third outer fitting step portion 43 and the inner fitting mountain portion 51 of the second inner fitting step portion 62 have a tensile area At3 at the tension-side contact surface 81, and the fourth outer fitting step portion.
  • the outer fitting mountain portion 31 of 44 and the inner fitting mountain portion 51 of the first inner fitting step portion 61 have a tensile area At 4 on the tensile-side contact surface 81.
  • each outer fitting step part 4 and each inner fitting step part 6 in each outer fitting step part 4 and each inner fitting step part 6, the outer fitting mountain part 31 and the inner fitting mountain part 51 mutually mutually.
  • the contact surfaces 8 to be contacted the distal end side of the outer fitting end portion 3 and the distal end side of the inner fitting end portion 5 are compression side abutting surfaces 86 that bear a compressive force.
  • the outer fitting mountain portion 31 of the second outer fitting step portion 42 and the inner fitting mountain portion 51 of the fourth inner fitting step portion 64 are compressed by the compression side contact surface 86.
  • the outer fitting mountain portion 31 of the third outer fitting step portion 43 and the inner fitting mountain portion 51 of the third inner fitting step portion 63 have a compression area Ac2 at the compression side abutment surface 86.
  • the outer fitting mountain portion 31 of the fourth outer fitting step portion 44 and the inner fitting mountain portion 51 of the second inner fitting step portion 62 have a compression area Ac3 at the compression side contact surface 86.
  • the outer fitting front end face 34 and the inner fitting base end face 55 are brought into contact with each other at the outer fitting facing portion 36, while the inner fitting front end face 54 and the outer fitting base end 55 are brought into contact with each other. It has a structure in which the end face 35 is not brought into contact.
  • the outer fitting facing portion 36 has a structure in which the outer fitting gap 37 is formed as in the inner fitting facing portion 56.
  • (A ′) The tensile force acting in the axial direction Y is resisted only by the four tension side contact surfaces 81 where the outer fitting mountain portion 31 and the inner fitting mountain portion 51 are in contact with each other
  • (B ′) The compression force acting in the axial direction Y is resisted only by the three compression side contact surfaces 86 on which the outer fitting mountain portion 31 and the inner fitting mountain portion 51 are in contact with each other.
  • the total area (At1 + At2 + At3 + At4) of the tension side abutment surface 81 that bears the tensile force among the abutment surfaces 8 that are in contact with each other between the outer fitting stepped portion 4 and the inner fitting stepped portion 6 is an outer portion that bears the compressive force. Formed to be equal to or less than the total area of the fitting tip surface 34 (0 in the case of the joint structure 207 according to the second modification) and the total area (Ac1 + Ac2 + Ac3) of the compression-side contact surface 86 bearing the compressive force. Is done.
  • the total area (At1 + At2 + At3 + At4) of the tension side abutment surface 81 that bears the tensile force among the abutment surfaces 8 that are in contact with each other between the outer fitting stepped portion 4 and the inner fitting stepped portion 6 bears the compressive force.
  • the compression-side contact surface 86 is preferably formed to have a total area (Ac1 + Ac2 + Ac3) or less.
  • the number of steps on which the compression-side contact surface 86 is formed is smaller than the number of steps on which the tension-side contact surface 81 is formed.
  • Each of the outer fitting ridge portions 31 and the total fitting area 31 is set so that the total area of the abutting surface 81 is equal to or less than the total area of the area of the outer fitting front end surface 34 that bears the compressive force and the total area of the compression side abutting surface 86.
  • a contact surface 8 is formed on which the internal fitting mountain portions 51 are in contact with each other.
  • the total area of the outer fitting front end surface 34 that bears the compressive force and the total area of the compression side contact surface 86 is equal to or greater than the total area of the tension side contact surface 81.
  • the outer fitting front end surface and the compression-side contact surface of each outer fitting mountain portion 31 and inner fitting mountain portion 51 Only 86 can resist.
  • the compression force acting in the axial direction Y with a magnitude equal to or greater than the tensile force can be achieved only by the compression-side contact surface 86 of each of the outer fitting mountain portion 31 and the inner fitting mountain portion 51.
  • the outer fitting mountain of the first outer fitting step portion 41 is used. Since the compressive force does not substantially act on the portion 31, it is not necessary to consider the compressive force acting on the external fitting mountain portion 31 of the first external fitting step portion 41 in design.
  • FIG. 14 the tensile force transmitted in the external fitting end part 3 of the joint structure 7 which concerns on this embodiment is shown.
  • a tensile force acting on the outer fitting mountain portion 31 of the first outer fitting step portion 41 is transmitted to the outer fitting valley portion 33 of the first outer fitting step portion 41.
  • Tensile force acting on the first outer fitting step portion 41 and the outer fitting mountain portion 31 of the second outer fitting step portion 42 is transmitted to the outer fitting valley portion 33 of the second outer fitting step portion 42 together.
  • the outer fitting valley portion 33 of the third outer fitting step portion 43 acts on the first outer fitting step portion 41, the second outer fitting step portion 42, and the outer fitting mountain portion 31 of the third outer fitting step portion 43. The tensile force is transmitted together.
  • the outer fitting valley portion 33 of the fourth outer fitting step portion 44 includes a first outer fitting step portion 41, a second outer fitting step portion 42, a third outer fitting step portion 43, and a fourth outer fitting step portion 44.
  • the tensile force acting on the outer fitting mountain portion 31 is transmitted together.
  • FIG. 15 the compressive force transmitted in the external fitting end part 3 of the joint structure 7 which concerns on this embodiment is shown.
  • a compression force acting on the outer fitting mountain portion 31 of the second outer fitting step portion 42 is transmitted to the outer fitting valley portion 33 of the second outer fitting step portion 42.
  • a compression force acting on the second outer fitting step portion 42 and the outer fitting mountain portion 31 of the third outer fitting step portion 43 is transmitted to the outer fitting valley portion 33 of the third outer fitting step portion 43 together.
  • the outer fitting valley portion 33 of the fourth outer fitting step portion 44 acts on the second outer fitting step portion 42, the third outer fitting step portion 43, and the outer fitting mountain portion 31 of the fourth outer fitting step portion 44. The compressive force is combined and transmitted.
  • the plate thickness of the outer fitting valley portion 33 is reduced at the first outer fitting step portion 41 on the distal end side of the outer fitting end portion 3, and the material cost of the outer fitting end portion 3 is increased.
  • the compression force is not substantially applied to the outer fitting mountain portion 31 of the first outer fitting step portion 41, so that the compression force is substantially applied to the outer fitting valley portion 33 in the first outer fitting step portion 41. Therefore, the buckling deformation of the thinnest outer fitting portion 30 can be prevented.
  • the joint structure 7 even if a compressive force acts on the outer fitting mountain portion 31 of the first outer fitting step portion 41, the compressive strength is applied to the outer fitting valley portion 33 of the first outer fitting step portion 41. Do not expect. For this reason, the joint structure 7 has the second outer fitting step even when the outer fitting thinnest portion 30 is buckled and deformed by the compressive force transmitted to the outer fitting valley portion 33 of the first outer fitting step portion 41. Since the compression force can be resisted by the external fitting valley portion 33 of the part 42, the third external fitting step portion 43, and the fourth external fitting step portion 44, the entire external fitting end portion 3 can maintain a predetermined compression strength. Is possible.
  • FIG. 16 the tensile force transmitted in the internal fitting end part 5 of the joint structure 7 which concerns on this embodiment is shown.
  • a tensile force acting on the inner fitting mountain portion 51 of the first inner fitting step portion 61 is transmitted to the inner fitting valley portion 53 of the first inner fitting step portion 61.
  • Tensile forces acting on the first internal fitting step portion 61 and the internal fitting mountain portion 51 of the second internal fitting step portion 62 are transmitted together to the internal fitting valley portion 53 of the second internal fitting step portion 62.
  • the inner fitting valley portion 53 of the third inner fitting step portion 63 acts on the first inner fitting step portion 61, the second inner fitting step portion 62, and the inner fitting mountain portion 51 of the third inner fitting step portion 63.
  • the tensile force is transmitted together.
  • the inner trough 53 of the fourth inner step 64 has a first inner step 61, a second inner step 62, a third inner step 63, and a fourth inner step 64.
  • FIG. 17 the compressive force transmitted in the internal fitting end part 5 of the joint structure 7 which concerns on this embodiment is shown.
  • a compression force acting on the inner fitting mountain portion 51 of the second inner fitting step portion 62 is transmitted to the inner fitting valley portion 53 of the second inner fitting step portion 62.
  • the compressive force acting on the second internal fitting step portion 62 and the internal fitting mountain portion 51 of the third internal fitting step portion 63 is transmitted to the internal fitting valley portion 53 of the third internal fitting step portion 63 together.
  • the inner fitting valley portion 53 of the fourth inner fitting step portion 64 acts on the second inner fitting step portion 62, the third inner fitting step portion 63, and the inner fitting mountain portion 51 of the fourth inner fitting step portion 64.
  • the compressive force is combined and transmitted.
  • the joint structure 7 reduces the plate
  • the joint structure 7 reduces the plate thickness of the inner fitting valley portion 53 at the first inner fitting step portion 61 on the distal end side of the inner fitting end portion 5 and suppresses an increase in material cost of the inner fitting end portion 5.
  • the compression force is not transmitted to the internal fitting valley portion 53 in the first internal fitting step portion 61 because the internal fitting gap 57 prevents the compression force from acting on the internal fitting mountain portion 51 of the first internal fitting step portion 61.
  • it is possible to prevent buckling deformation of the thinnest inner fitting portion 50.
  • FIG. 18A shows a joint structure 307 according to a third modification of the present invention.
  • a part or all of the plurality of outer fitting stepped portions 4 and inner fitting stepped portions 6 are tapered on the side surfaces in the direction orthogonal to the axial center X of the outer fitting valley portion 33 and the inner fitting mountain portion 51. It may be provided.
  • FIG. 18B shows a joint structure 407 according to a fourth modification of the present invention.
  • a part or all of the plurality of outer fitting stepped portions 4 and the inner fitting stepped portion 6 are tapered on the side surfaces in the axial orthogonal direction X of the inner fitting valley portion 53 and the outer fitting mountain portion 31. It may be provided.
  • the external fitting mountain portions 31 of the respective external fitting step portions 4 are axially centered from the distal end side to the proximal end side of the external fitting end portion 3. It is arranged inside the orthogonal direction X.
  • r42 is defined as a radius r43 from the central axis to the external fitting mountain portion 31 of the third external fitting stepped portion 43, and a radius r44 from the central axis to the external fitting mountain portion 31 of the fourth external fitting stepped portion 44, r41
  • the relationship of>r42>r43> r44 is satisfied.
  • the height of the base end side of the outer fitting end portion 3 at the outer fitting mountain portion 31 of the first outer fitting step portion 41 is set to ht1
  • the height of the base end side of the external fitting end portion 3 at the external fitting mountain portion 31 of the external fitting step portion 42 is ht2
  • the base end side of the external fitting end portion 3 at the external fitting mountain portion 31 of the third external fitting step portion 43 is defined as ht3
  • the height of the base end side of the outer fitting end portion 3 is defined as ht4 in the outer fitting mountain portion 31 of the fourth outer fitting step portion 44
  • the height of the external fitting mountain portion 31 is set so that the relationship of ht1 ⁇ ht2 ⁇ ht3 ⁇ ht4 is satisfied, so that each external fitting step In the external fitting mountain portion 31 of the portion 4, the tensile area At1, the tensile area At2, the tensile area At3, and the tensile area At4 may be substantially the same.
  • the height of the front end side of the outer fitting end portion 3 at the outer fitting mountain portion 31 of the second outer fitting step portion 42 is hc1, third.
  • the height of the base end side of the outer fitting end portion 3 is hc2 at the outer fitting mountain portion 31 of the outer fitting step portion 43, and the base end side of the outer fitting end portion 3 at the outer fitting mountain portion 31 of the fourth outer fitting step portion 44.
  • Is defined as hc3 the relationship of hc1 ⁇ hc2 ⁇ hc3 is satisfied.
  • the height of the outer fitting mountain portion 31 is set so that the relationship of hc1 ⁇ hc2 ⁇ hc3 is satisfied, so that each outer fitting step portion 4 is set.
  • the compression area Ac1, the compression area Ac2, and the compression area Ac3 may be substantially the same.
  • the inner fitting mountain portions 51 of the respective inner fitting step portions 6 are axially centered from the distal end side to the proximal end side of the inner fitting end portion 5. It is arranged outside the orthogonal direction X.
  • r62 is defined as a radius r63 from the central axis to the internal fitting mountain portion 51 of the third internal fitting step portion 63, and a radius r64 from the central axis to the internal fitting mountain portion 51 of the fourth internal fitting step portion 64, r61
  • the relationship ⁇ r62 ⁇ r63 ⁇ r64 is satisfied.
  • the height of the base end side of the inner fitting end portion 5 at the inner fitting mountain portion 51 of the fourth inner fitting step portion 64 is set to ht1
  • the height of the base end side of the internal fitting end portion 5 at the internal fitting mountain portion 51 of the internal fitting step portion 63 is ht2
  • the base end side of the internal fitting end portion 5 at the internal fitting mountain portion 51 of the second internal fitting step portion 62 is set to ht1
  • each internal fitting step In the internal fitting mountain part 51 of the part 6, the tensile area At1, the tensile area At2, the tensile area At3, and the tensile area At4 may be substantially the same.
  • the height of the tip end side of the inner fitting end portion 5 at the inner fitting mountain portion 51 of the fourth inner fitting step portion 64 is hc1, third.
  • the height of the base end side of the internal fitting end portion 5 at the internal fitting mountain portion 51 of the internal fitting step portion 63 is hc2, and the base end side of the internal fitting end portion 5 at the internal fitting mountain portion 51 of the second internal fitting step portion 62. Is defined as hc3, the relationship of hc1 ⁇ hc2 ⁇ hc3 is satisfied.
  • the height of the inner fitting mountain portion 51 is set so that the relationship of hc1 ⁇ hc2 ⁇ hc3 is satisfied, whereby each inner fitting step portion 6 is set.
  • the compression area Ac1, the compression area Ac2, and the compression area Ac3 may be substantially the same.
  • the external fitting step 4 and the internal fitting step are respectively applied to the tensile force acting in the axial direction Y.
  • the compression area Ac1, the compression area Ac2, and the compression area Ac3 are set to be substantially the same, so that the outer fitting step part 4 and the inner fitting step part 6 have a compressive force acting in the axial direction Y.
  • the external fitting mountain part 31 and the internal fitting mountain part 51 it can resist substantially equally.
  • the joint structure 7 can be applied to the outer fitting step portion 4 and the inner fitting step portion 51 of the inner fitting step portion 6 and the inner fitting step portion 51 with respect to the tensile force and compression force acting in the axial direction Y. Since it can resist substantially evenly, it is possible to reduce the waste in structural strength of the outer fitting end portion 3 and the inner fitting end portion 5 and facilitate the structural calculation for the tensile force and the compressive force. .
  • the protrusion heights of the internal fitting mountain portions in the plurality of internal fitting step portions, and the protrusion heights of the external fitting mountain portions in the plurality of external fitting step portions are as described above. At least one of them may be substantially the same. “Substantially the same” in the present invention allows a manufacturing error of about 20%, and even when these manufacturing errors occur in the outer fitting mountain portion 31 and the inner fitting mountain portion 51, These areas are set to be substantially the same.
  • the inner fitting end 5 may be attached to the first steel pipe pile 1 and the outer fitting end 3 may be attached to the second steel pipe pile 2.
  • the outer fitting step portion 4 and the inner fitting step portion 6 may be formed in any number of steps in the axial direction Y of the outer fitting end portion 3 and the inner fitting end portion 5.
  • each of the outer fitting mountain portion 31 and the inner fitting mountain portion 51 is arranged in a substantially staggered manner with the position in the axial direction Y being shifted. May be.
  • the external fitting end part 3 or the internal fitting end part 5 is provided in the 1st steel pipe pile 1 or the 2nd steel pipe pile 2 itself by cutting the edge part of the 1st steel pipe pile 1 or the 2nd steel pipe pile 2. Also good.
  • the present invention it is possible to reduce the plate thickness on the distal end side of the outer fitting end portion and the inner fitting end portion to suppress an increase in material cost, and at the same time, prevent buckling deformation of the thinnest portion on the distal end side. It is possible to provide a steel pipe pile joint structure.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)
PCT/JP2014/082168 2013-12-06 2014-12-04 鋼管杭の継手構造 WO2015083807A1 (ja)

Priority Applications (7)

Application Number Priority Date Filing Date Title
KR1020167010198A KR101879964B1 (ko) 2013-12-06 2014-12-04 강관 말뚝의 조인트 구조
SG11201601933PA SG11201601933PA (en) 2013-12-06 2014-12-04 Joint structure for steel pipe pile
AU2014358146A AU2014358146B2 (en) 2013-12-06 2014-12-04 Joint structure for steel pipe pile
CN201480057909.9A CN105658876A (zh) 2013-12-06 2014-12-04 钢管桩的接头构造
JP2015551567A JP6202102B2 (ja) 2013-12-06 2014-12-04 鋼管杭の継手構造
PH12016500755A PH12016500755A1 (en) 2013-12-06 2016-04-22 Joint structure for steel pipe pile
HK16112254.8A HK1223992A1 (zh) 2013-12-06 2016-10-25 鋼管樁的接頭構造

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-252957 2013-12-06
JP2013252957 2013-12-06

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KR (1) KR101879964B1 (zh)
CN (1) CN105658876A (zh)
AU (1) AU2014358146B2 (zh)
HK (1) HK1223992A1 (zh)
MY (1) MY180215A (zh)
PH (1) PH12016500755A1 (zh)
SG (1) SG11201601933PA (zh)
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105887808A (zh) * 2016-05-31 2016-08-24 浙江工业大学 一种混凝土管桩及其施工方法
CN110090415A (zh) * 2018-01-29 2019-08-06 锦美运动用品（东莞）有限公司 多段组合球棒结构
US10704724B1 (en) 2019-04-19 2020-07-07 Robert L. Griggs, Jr. Fittings for joining lengths of pipe by a press-fit connection and pipe assembly formed using same

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107338791A (zh) * 2017-07-05 2017-11-10 汤始建华建材（苏州）有限公司 一种新型管桩组合件
KR101885528B1 (ko) * 2017-12-14 2018-09-10 도원산업(주) Ｐｈｃ 파일 무볼트 연결구
WO2020166607A1 (ja) 2019-02-12 2020-08-20 株式会社技研製作所 杭体継手、杭体連結構造及び杭体連結方法
CN111395326A (zh) * 2020-03-31 2020-07-10 安徽建筑大学 一种薄壁管桩相邻桩段间连接结构

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JPH1143936A (ja) * 1997-07-29 1999-02-16 Kubota Corp 杭の継手部構造
JP2004293035A (ja) * 2003-03-25 2004-10-21 Jfe Steel Kk 鋼管の継手構造

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JP3755966B2 (ja) * 1997-07-29 2006-03-15 株式会社クボタ 杭の継手部構造
JP3877746B2 (ja) * 2005-06-17 2007-02-07 株式会社クボタ 杭の継手部構造
NL2004010C2 (nl) * 2009-12-23 2011-06-27 Ihc Holland Ie Bv Koppeling voor het losmaakbaar koppelen van buizen.
CN202945601U (zh) * 2012-10-25 2013-05-22 国鼎(南通)管桩有限公司 一种tsc、phc组合桩

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JPH1143936A (ja) * 1997-07-29 1999-02-16 Kubota Corp 杭の継手部構造
JP2004293035A (ja) * 2003-03-25 2004-10-21 Jfe Steel Kk 鋼管の継手構造

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105887808A (zh) * 2016-05-31 2016-08-24 浙江工业大学 一种混凝土管桩及其施工方法
CN110090415A (zh) * 2018-01-29 2019-08-06 锦美运动用品（东莞）有限公司 多段组合球棒结构
US10704724B1 (en) 2019-04-19 2020-07-07 Robert L. Griggs, Jr. Fittings for joining lengths of pipe by a press-fit connection and pipe assembly formed using same

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PH12016500755B1 (en) 2016-05-30
HK1223992A1 (zh) 2017-08-11
KR20160058165A (ko) 2016-05-24
AU2014358146B2 (en) 2017-01-05
SG11201601933PA (en) 2016-04-28
PH12016500755A1 (en) 2016-05-30
JPWO2015083807A1 (ja) 2017-03-16
TW201533299A (zh) 2015-09-01
JP6202102B2 (ja) 2017-09-27
MY180215A (en) 2020-11-25
KR101879964B1 (ko) 2018-07-18
CN105658876A (zh) 2016-06-08
TWI623670B (zh) 2018-05-11
AU2014358146A1 (en) 2016-04-28

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