WO2014080824A1 - 鋼管杭の継手構造、及び鋼管杭 - Google Patents

鋼管杭の継手構造、及び鋼管杭 Download PDF

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Publication number
WO2014080824A1
WO2014080824A1 PCT/JP2013/080748 JP2013080748W WO2014080824A1 WO 2014080824 A1 WO2014080824 A1 WO 2014080824A1 JP 2013080748 W JP2013080748 W JP 2013080748W WO 2014080824 A1 WO2014080824 A1 WO 2014080824A1
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WO
WIPO (PCT)
Prior art keywords
steel pipe
pipe pile
outer fitting
fitting
axial direction
Prior art date
Application number
PCT/JP2013/080748
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
弘信 松宮
妙中　真治
津留　英司
義法 藤井
壮哉 東
坂井　孝行
惟史 望月
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 SG11201408621VA priority Critical patent/SG11201408621VA/en
Priority to CN201380040518.1A priority patent/CN104508210B/zh
Priority to EP13857558.4A priority patent/EP2924169B1/en
Priority to JP2014548535A priority patent/JP5811289B2/ja
Priority to IN11226DEN2014 priority patent/IN2014DN11226A/en
Publication of WO2014080824A1 publication Critical patent/WO2014080824A1/ja
Priority to HK15107506.5A priority patent/HK1207133A1/xx

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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
    • E02D5/24—Prefabricated piles
    • E02D5/28—Prefabricated piles made of steel or other metals
    • E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2200/00—Geometrical or physical properties
    • E02D2200/16—Shapes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00—Miscellaneous
    • E02D2600/20—Miscellaneous comprising details of connection between elements

Definitions

  • the present invention relates to a steel pipe pile for connecting an upper steel pipe pile and a lower steel pipe pile in the axial direction by fitting a pair of externally fitted end parts and an internally fitted end part to each other in the field. And a steel pipe pile using the joint structure. More particularly, the present invention relates to a steel pipe pile joint structure and a steel pipe pile used in the field of civil engineering and construction such as a foundation of a building and a foundation of a bridge.
  • joint structures of steel pipe piles have been broadly classified into screw type, key type, and gear type for the purpose of connecting the upper steel pipe pile and the lower steel pipe pile in the axial direction.
  • a steel pipe pile joint structure as disclosed in 1-3 is proposed.
  • a joint structure of a screw-type steel pipe pile is used, and an end part of the other steel pipe pile is formed while a male thread part is formed at the end part of one steel pipe pile.
  • a male thread part is formed at the end part of one steel pipe pile.
  • an internal thread portion is formed in the joint structure of a steel pipe pile disclosed in Patent Document 1.
  • a lower steel pipe pile with an internal thread formed at the end is buried in the ground, and the external thread formed at the end of the upper steel pipe pile is used as the lower steel pipe.
  • the upper steel pipe pile and the lower steel pipe pile are connected in the axial direction by screwing into the female thread portion of the pile.
  • a key-type steel pipe pile joint structure is used, and the key member is assembled in advance to the inward groove of the female side end of the steel pipe pile. After the male end of the steel pipe pile is inserted into the female end of the steel pipe pile, the key member is pushed into the center side of the steel pipe pile to engage the male end of the steel pipe pile with the female end of the steel pipe pile.
  • the joint structure of a steel pipe pile disclosed in Patent Document 3 uses a gear-type steel pipe pile joint structure and is based on a screw type, but the problem in the joint structure of a screw-type steel pipe pile is solved. ing.
  • a plurality of outward engagement convex portions are provided along the axial direction at the male end of the steel pipe pile, and the axial core is provided at the female end of the steel pipe pile.
  • a plurality of inward engaging projections are provided along the direction.
  • the male side end and the female side end of the steel pipe pile are fitted, and the outward engagement convex part and the inward engagement convex part are engaged with each other.
  • the upper steel pipe pile and the lower steel pipe pile are connected in the axial direction.
  • the outward engagement convex portion and the inward engagement convex portion are in mesh with each other. For this reason, when a bending load or a tensile load acts on the joint portion of the steel pipe pile, the outward engagement convex portion and the inward engagement convex portion contact each other, and these loads are transmitted to the main body of the steel pipe pile. .
  • the contact area between the outward engagement convex part and the inward engagement convex part and the mounting area of the engagement convex part with respect to the end of the steel pipe pile are sufficient for bearing strength and shear strength to transmit these loads. It needs to be set to withstand. Moreover, it is necessary to set the plate
  • Japanese Laid-Open Patent Publication No. 7-82738 page 7, Fig. 2
  • Japanese Unexamined Patent Publication No. 2000-257058 page 10, FIG. 6
  • Japanese Laid-Open Patent Publication No. 11-43937 page 6, FIG. 1
  • the engaging convex portions are provided intermittently in the circumferential direction of the steel pipe pile and are provided in a line in the axial direction. For this reason, a cross-sectional defect occurs when viewed in the axial direction, and the bending load and the tensile load that can be transmitted by the engaging convex portion are reduced by the amount corresponding to the cross-sectional defect. For this reason, in the joint structure of the steel pipe pile disclosed in Patent Document 3, in order to withstand predetermined bending loads and tensile loads, the engagement protrusions enlarged by the cross-sectional defect in the axial direction view are used. In addition, it is necessary to increase the number of steps in the axial direction of the engaging convex portion. Therefore, there exists a problem that the processing cost and material cost of the joint structure of a steel pipe pile increase.
  • the engagement convex portion is formed at a portion corresponding to the outermost edge portion of the steel pipe pile where the tensile stress is maximum. May not be arranged in a line in the axial direction. At this time, a bending load acts on the site where the cross-sectional defect is formed, and the joint portion of the steel pipe pile may be damaged without being able to withstand the bending load. Therefore, the steel pipe pile joint structure disclosed in Patent Document 3 has a problem that a structural defect occurs.
  • the present invention has been made in view of the above-mentioned problems, and while suppressing an increase in the labor of rotating the steel pipe pile at the site, avoiding an increase in the thickness of the steel pipe pile more than necessary, and a bending load acts. It aims at providing the joint structure of a steel pipe pile and a steel pipe pile which do not have the possibility of damaging.
  • the 1st mode concerning the present invention is a joint structure of a steel pipe pile which joins the 1st steel pipe pile and the 2nd steel pipe pile in series, Comprising: The external fitting which is the opening end of the 1st steel pipe pile An end portion; and a columnar inner fitting end portion forming a portion to be inserted into the outer fitting end portion at one end of the second steel pipe pile.
  • a plurality of external fitting protrusions projecting radially inward of one steel pipe pile and provided along the circumferential direction of the first steel pipe pile, and the external fitting adjacent to each other in the circumferential direction of the first steel pipe pile An outer fitting groove formed between the projections, and along the circumferential direction at a position inside the axial direction of the first steel pipe pile than the outer fitting projection and the outer fitting groove on the inner peripheral surface.
  • An outer fitting engagement groove to be formed, and the inner fitting end portion projects from the outer peripheral surface toward the radially outer side of the second steel pipe pile.
  • One has a plurality of internal fitting convex portions provided along the circumferential direction of the second steel pipe pile, and each of the internal fitting convex portions has the internal fitting end portion inserted into the external fitting end portion,
  • the first steel pipe pile and the second steel pipe pile are rotated relative to each other around the axis of the first steel pipe pile, and then engaged with each of the outer fitting convex portions in the outer fitting engagement groove,
  • the convex part and the external fitting groove part form a plurality of rows along the axial direction of the first steel pipe pile, and at least one set of the plurality of rows adjacent to each other,
  • the outer fitting convex portion of the row and the outer fitting groove portion of the other row are provided so as to be adjacent to each other in the radial direction of the first steel pipe pile when viewed from the axial direction of the first steel pipe pile.
  • the outer fitting end portion has a plurality of step portions formed along the axial direction of the first steel pipe pile.
  • Each of the plurality of step portions is provided with at least one row of the outer fitting convex portion and the outer fitting groove portion, and in two adjacent step portions, the outer fitting convex portion of one of the step portions and The outer fitting groove portion of the other stepped portion is provided so as to be adjacent in the radial direction of the first steel pipe pile when viewed from the axial direction of the first steel pipe pile.
  • the above aspect (2) it may be configured as follows: in two adjacent stepped portions, when viewed from the axial direction of the first steel pipe pile, one of the stepped portions The outer fitting convex part is provided in all the positions adjacent to the outer fitting groove part of the other stepped part in the radial direction of the first steel pipe pile, and the outer fitting convex part is provided in the first steel pipe pile.
  • the first steel pipe pile When viewed from the axial direction of the first steel pipe pile, the first steel pipe pile is provided without any gap along the circumferential direction.
  • the plurality of stepped portions adjacent to each other in the axial direction of the first steel pipe pile are formed of the first steel pipe pile.
  • the outer fitting convex portion of the step portion located on the outer side in the axial direction and the outer fitting groove portion of the step portion located on the inner side in the axial direction of the first steel pipe pile have substantially the same thickness.
  • the first steel pipe pile is formed by gradually increasing the thickness along the axial direction of the first steel pipe pile.
  • the inner fitting end portion is on the inner side in the axial direction of the second steel pipe pile.
  • the inner fitting edge portion is formed to form a gap with the distal end portion of the outer fitting end portion, and the outer fitting convex portion is
  • the first steel pipe pile is inclined along the circumferential direction of the first steel pipe pile such that the axial height of the first steel pipe pile is substantially the same as the gap on the end face on the inner side in the axial direction of the first steel pipe pile.
  • the external fitting engagement groove is substantially parallel to the first taper portion at a portion facing the first taper portion in the axial direction of the first steel pipe pile. It has a 2nd taper part which inclines in the peripheral direction of the 1st steel pipe pile, and the above-mentioned internal fitting convex part contacts the 1st taper part to the end surface inside the direction of an axis of the 2nd steel pipe pile.
  • the second steel pipe has a third tapered portion inclined along the circumferential direction of the second steel pipe pile, and an end face on the outer side in the axial direction of the second steel pipe pile so as to come into contact with the second tapered portion.
  • the 4th taper part which inclines along the peripheral direction of a pile, and the above-mentioned external fitting end part and the above-mentioned internal fitting end part are the above-mentioned 1st steel pipe pile and the above-mentioned 1st steel pipe pile.
  • the first taper portion and the third taper portion are brought into contact with each other and the second taper portion and the fourth taper portion are brought into contact with each other by rotating relative to each other around the axis.
  • the fitting projection and the plurality of inner fitting projections are engaged, and the inner fitting edge and the tip are brought into contact with each other so as to fill the gap, and are fitted to each other.
  • a second aspect according to the present invention is a steel pipe pile including the steel pipe pile joint structure according to any one of (1) to (5) above.
  • the outer fitting convex portion of one row and the other is provided so as to be adjacent to each other in the radial direction of the steel pipe pile when viewed from the axial direction of the steel pipe pile.
  • the upper steel pipe pile can be connected.
  • the outer fitting convex portion of one row And the outer fitting groove of the other row are provided so as to be adjacent to each other in the radial direction of the steel pipe pile when viewed from the axial direction of the steel pipe pile, so that the outer fitting convex part and the inner fitting convex part bear
  • the load and the tensile load can be made uniform in the circumferential direction.
  • the outer fitting convex portion of one row And the outer fitting groove in the other row are provided adjacent to each other in the radial direction of the steel pipe pile when viewed from the axial direction of the steel pipe pile, so that the lower steel pipe pile and the upper steel pipe pile are connected to each other. Even when a bending load is applied, the outer edge of the steel pipe pile that maximizes the tensile stress is applied to any of the outer fitting convex portions of the plurality of rows and any of the inner fitting convex portions of the plurality of rows.
  • the outer fitting convex portion of one step portion and the outer fitting groove portion of the other step portion are:
  • the upper steel pipe pile is inserted into the lower steel pipe pile without interference between the outer fitting convex part and the inner fitting convex part because they are provided adjacent to each other in the radial direction of the steel pipe pile. can do.
  • the external fitting convex portions provided in each of the plurality of step portions are formed without gaps along the circumferential direction when viewed from the axial direction of the steel pipe pile. Therefore, the contact area between the outer fitting convex portion and the inner fitting convex portion is maximized, and the yield strength against the tensile load and the bending load can be increased.
  • the inner end of the outer end and the inner end of the inner end are in a state where the outer end protrusion and the inner end protrusion are engaged in the axial direction.
  • the fitting edge portion By contacting the fitting edge portion, it can be visually confirmed from the outside that the outer fitting end portion and the inner fitting end portion are completely fitted.
  • the third taper portion is brought into contact with the first taper portion, and the fourth taper portion is brought into contact with the second taper portion, whereby the inner fitting convex portion is smoothly moved in the circumferential direction by the outer fitting engagement groove.
  • the outer fitting end and the inner fitting end can be easily fitted. Furthermore, since the inner fitting convex part is locked by the locking part formed in the outer fitting engaging groove, the steel pipe pile can be prevented from rotating more than necessary.
  • FIG. 1 It is a perspective view showing the state where the steel pipe pile was connected using the joint structure of the steel pipe pile concerning a 1st embodiment of the present invention. It is a perspective view which shows the joint structure of the steel pipe pile which concerns on 1st Embodiment of this invention. It is a partially broken side view which shows the external fitting end part in 1st Embodiment of this invention. It is a top view which shows the external fitting end part in 1st Embodiment of this invention. It is a top view which shows the modification of the external fitting end part. It is an enlarged front view which shows an external fitting convex part, an external fitting groove part, and an external fitting engagement groove.
  • FIG. 6 is a view showing an outer fitting convex portion, an outer fitting groove portion, and an outer fitting engagement groove, and is a cross-sectional view taken along the line AA in FIG. 5. It is a side view which shows the internal fitting end part in 1st Embodiment of this invention. It is a top view which shows the internal fitting end part in 1st Embodiment of this invention. It is a top view which shows the modification of the same fitting end part. It is an enlarged front view which shows an internal fitting convex part, an internal fitting groove part, and an internal fitting engagement groove.
  • FIG. 10 is a view showing an inner fitting convex portion, an inner fitting groove portion, and an inner fitting engagement groove, and is a cross-sectional view taken along line BB in FIG. 9.
  • FIG. 14B is an enlarged view of a portion indicated by a two-dot chain line circle in FIG.
  • FIG 14A is a diagram illustrating a modified example of the external fitting convex portion. It is a perspective view which shows the state which an upper steel pipe pile rotates relatively in 1st Embodiment of this invention. It is an expansion perspective view which shows the state by which an external fitting convex part and an internal fitting convex part are engaged in 1st Embodiment of this invention. It is an enlarged front view which shows the state by which an external fitting convex part and an internal fitting convex part are engaged in 1st Embodiment of this invention. It is a perspective view which shows the deformation
  • the steel pipe pile joint structure 1 includes a lower steel pipe pile 2 (first steel pipe pile) and an upper steel pipe pile 3 (second steel pipe pile) in the axial direction X as shown in FIG. Used to connect (join) along.
  • the joint structure 1 includes an outer fitting end 20 provided at the upper end (opening end) of the lower steel pipe pile 2 and a columnar inner fitting end provided at the lower end (one end) of the upper steel pipe pile 3. Part 30.
  • the inner fitting end portion 30 of the upper steel pipe pile 3 is fitted to the outer fitting end portion 20 of the lower steel pipe pile 2 embedded in the ground.
  • two outer fitting step portions 29 (29a, 29b) arranged in the axial direction X of the lower steel pipe pile 2 are provided at the outer fitting end portion 20, and the upper steel pipe
  • Two internal fitting step portions 39 (39a, 39b) arranged in the axial direction X of the pile 3 are provided in the internal fitting end portion 30.
  • each outer fitting step portion 29 is an inner wall surface (inner circumferential surface) of the outer fitting end portion 20 and a direction perpendicular to the axial center direction Y (the direction orthogonal to the axial direction X) of the lower steel pipe pile 2 ( (Radial direction): a plurality of outer fitting convex portions 21 formed to project to the center side (radially inner side) of FIG. 1 and a plurality of outer fitting groove portions formed between the plurality of outer fitting convex portions 21. 22, and a plurality of outer fitting protrusions 21 and an outer fitting engagement groove 23 formed on the inner side (lower side) in the axial direction X of the lower steel pipe pile 2 from the plurality of outer fitting groove portions 22.
  • the outer fitting step portion 29 includes the outer fitting convex portion 21 of the first outer fitting step portion 29a on the outer side (upper side) in the axial direction X of the lower steel pipe pile 2 and the inner side (lower side) of the lower steel pipe pile 2 in the axial direction X.
  • the thickness of the lower steel pipe pile 2 in the axial direction X so that the outer fitting groove 22 of the second external fitting step 29b on the side) has substantially the same thickness in the direction Y perpendicular to the axial center of the lower steel pipe pile 2. It is formed by thickening in stages.
  • the outer fitting convex portion 21 of the first outer fitting step portion 29a has a plate thickness of a predetermined width t1 in the axial center orthogonal direction Y on the outer side (upper side) of the lower steel pipe pile 2 in the axial direction X.
  • the outer fitting convex part 21 is formed in each outer fitting step part 29 (29a, 29b) so as to protrude in a substantially rectangular shape in the direction Y perpendicular to the axis of the lower steel pipe pile 2.
  • the outer fitting groove portion 22 is formed between the plurality of outer fitting convex portions 21 in each outer fitting step portion 29 (29a, 29b), and has a predetermined width in the circumferential direction Z (see FIG. 1) of the lower steel pipe pile 2.
  • Have The outer fitting engagement groove 23 is formed inside (lower side) in the axial direction X of the lower steel pipe pile 2 from the outer fitting convex portion 21 and the outer fitting groove portion 22 in each of the outer fitting step portions 29 (29a, 29b).
  • the lower steel pipe pile 2 has a predetermined height in the axial direction X and a thickness substantially the same as that of the outer fitting groove 22 in the axial orthogonal direction Y.
  • the outer fitting convex portion 21 includes a first outer fitting step portion 29a on the outer side (upper side) in the axial direction X of the lower steel pipe pile 2 and an inner side in the axial direction X of the lower steel pipe pile 2 from the first outer fitting step portion 29a. (Lower side) and a second outer fitting step portion 29b adjacent to the first outer fitting step portion 29a.
  • the outer fitting convex portion 21 of the first outer fitting step portion 29a and the outer fitting convex portion 21 of the second outer fitting step portion 29b are formed by shifting the positions in the axial direction X.
  • the outer fitting convex portion 21 of the first outer fitting step portion 29a and the outer fitting convex portion 21 of the second outer fitting step portion 29b are formed at different positions in the axial direction X.
  • an outer fitting convex portion 21 is formed on the first outer fitting step portion 29a, and an outer fitting groove portion 22 formed on the first outer fitting step portion 29a
  • the outer fitting convex portion 21 of the second outer fitting step portion 29b is formed at all positions adjacent to the axis orthogonal direction Y in the axial direction view. Accordingly, the outer fitting convex portion 21 of the first outer fitting step portion 29a and the outer fitting convex portion 21 of the second outer fitting step portion 29b are alternately formed without a gap in the circumferential direction Z as viewed in the axial direction.
  • the external fitting convex part 21 is not restricted to the above,
  • the external fitting convex part 21 of the 2nd external fitting step part 29b may be formed in a part of position adjacent to.
  • the outer fitting convex portion 21 of the first outer fitting step portion 29a and the outer fitting convex portion 21 of the second outer fitting step portion 29b are alternately formed with a gap in the circumferential direction Z as viewed in the axial direction. May be.
  • the outer fitting convex portion 21 is linearly inclined in the circumferential direction Z of the lower steel pipe pile 2 on the lower end surface in the axial direction X (lower side) of the lower steel pipe pile 2.
  • the outer fitting engagement groove 23 is formed at the portion facing the first taper portion 21a in the axial direction X of the lower steel pipe pile 2 so as to be substantially parallel to the first taper portion 21a. It has the 2nd taper part 23a which inclines linearly in the direction Z.
  • the external fitting engagement groove 23 has a locking portion 23b extending in the axial direction X at the end of the second taper portion 23a.
  • the first taper portion 21a has a predetermined height h in the axial direction X of the lower steel pipe pile 2.
  • the 2nd taper part 23a is extended not only to the site
  • the 2nd taper part 23a is not restricted above, For example, as shown in FIG. 5, you may be extended to the intermediate part 23c located in the lower side of the external fitting groove part 22.
  • the first taper portion 21 a and the second taper portion 23 a are linearly formed in the outer fitting convex portion 21 and the outer fitting engagement groove 23.
  • the 1st taper part 21a and the 2nd taper part 23a may be formed in the outer fitting convex part 21 and the outer fitting engagement groove 23 inclining in circular arc shape. Further, the first taper portion 21 a and the second taper portion 23 a may be formed separately from the outer fitting convex portion 21 and the outer fitting engagement groove 23.
  • the inner fitting end 30 has an axis of the upper steel pipe pile 3 on the inner side (upper side) in the axial direction X of the upper steel pipe pile 3 from the two inner fitting step parts 39 (39 a, 39 b).
  • An inner fitting edge portion 38 formed to protrude outward in the core orthogonal direction Y is formed.
  • the inner fitting end portion 30 is protruded outward in the axial direction perpendicular to the axis Y of the upper steel pipe pile 3 at the outer wall surface (outer peripheral surface) of the inner fitting end portion 30 in each inner fitting step portion 39 (39a, 39b).
  • the plurality of internally fitted protrusions 31, the plurality of internally fitted groove parts 32 formed between the plurality of internally fitted convex parts 31, the plurality of internally fitted convex parts 31, and the plurality of internally fitted groove parts 32.
  • an inner fitting engagement groove 33 formed on the inner side (upper side) in the axial direction X of the steel pipe pile 3.
  • the inner fitting step portion 39 includes the inner fitting groove portion 32 of the first inner fitting step portion 39a on the inner side (upper side) in the axial direction X of the upper steel pipe pile 3, and the outer side (lower side) of the upper steel pipe pile 3 in the axial direction X.
  • the thickness of the upper steel pipe pile 3 in the axial direction X is set so that the inner fitting convex part 31 of the second internal fitting step 39b in FIG. It is formed by thickening in stages.
  • the inner fitting engagement groove 33 of the first inner fitting step portion 39 a has a gap with a predetermined width t ⁇ b> 2 in the axial center orthogonal direction Y of the upper steel pipe pile 3.
  • the inner fitting convex part 31 is formed by projecting in a substantially rectangular shape in the axial center orthogonal direction Y of the upper steel pipe pile 3 in each inner fitting step part 39 (39a, 39b).
  • the inner fitting groove portion 32 is formed between the plurality of inner fitting convex portions 31 in each inner fitting step portion 39 (39a, 39b), and has a predetermined width in the circumferential direction Z of the upper steel pipe pile 3.
  • the inner fitting engagement groove 33 is located on the inner side (upper side) in the axial direction X of the upper steel pipe pile 3 from the inner fitting convex portion 31 and the inner fitting groove portion 32, and in the first inner fitting step portion 39a.
  • the width t2 (see FIG.
  • the inner fitting groove 33 has a predetermined height in the axial direction X of the upper steel pipe pile 3 and substantially the same thickness as the inner fitting groove 32 in the axial orthogonal direction Y in each inner fitting step portion 39.
  • the inner fitting convex part 31 is the outer side of the axial direction X of the upper steel pipe pile 3 from the first inner fitting step part 39a on the inner side (upper side) of the axial direction X of the upper steel pipe pile 3 and the first inner fitting step part 39a. (Lower side), it is formed in the second internal fitting step portion 39b adjacent to the first internal fitting step portion 39a.
  • the inner fitting convex portion 31 of the first inner fitting step portion 39a and the inner fitting convex portion 31 of the second inner fitting step portion 39b are formed by shifting the positions in the axial direction X.
  • the inner fitting convex portion 31 of the first inner fitting step portion 39a and the inner fitting convex portion 31 of the second inner fitting step portion 39b are formed at different positions in the axial direction X.
  • An internally fitted convex portion 31 is formed. Therefore, the inner fitting convex part 31 of the first inner fitting step part 39a and the inner fitting convex part 31 of the second inner fitting step part 39b are alternately formed without a gap in the circumferential direction Z as viewed in the axial direction.
  • the internal fitting convex part 31 is not restricted to the above,
  • the internal fitting convex part 31 of the 2nd internal fitting step part 39b may be formed in a part of position adjacent to.
  • the inner fitting convex portion 31 of the first inner fitting step portion 39a and the inner fitting convex portion 31 of the second inner fitting step portion 39b are alternately formed with a gap in the circumferential direction Z as viewed in the axial direction. May be.
  • the inner fitting convex portion 31 is in contact with the first taper portion 21 a shown in FIG. 5 on the upper end surface on the inner side (upper side) in the axial direction X of the upper steel pipe pile 3. It has the 3rd taper part 31a which inclines linearly in the circumferential direction Z of the upper steel pipe pile 3 so that it may become substantially parallel to the 1st taper part 21a. Moreover, the inner fitting convex part 31 is contact
  • 3rd taper part 31a and 4th taper part 31b have the predetermined height h in the axial direction X of the upper steel pipe pile 3. As shown in FIG. Further, as described above, the third taper portion 31 a and the fourth taper portion 31 b are linearly formed on the inner fitting convex portion 31. However, the 3rd taper part 31a and the 4th taper part 31b may be formed in the inner fitting convex part 31 inclining in circular arc shape. Further, the third taper portion 31 a and the fourth taper portion 31 b may be formed separately from the inner fitting convex portion 31.
  • FIGS. 11 and 12 the inner fitting end portion 30 of the upper steel pipe pile 3 is inserted along the axial direction X into the outer fitting end portion 20 of the lower steel pipe pile 2.
  • FIG. 11 is a view showing a state in which the inner fitting end portion 30 is inserted into the outer fitting end portion 20, and
  • FIG. 12 shows the inner fitting end portion 30 further than the state shown in FIG. 11. It is a figure which shows the state inserted in.
  • the outer fitting convex portion 21 of the first outer fitting step portion 29 a and the outer fitting groove portion 22 of the second outer fitting step portion 29 b are orthogonal to the axis of the lower steel pipe pile 2.
  • the inner fitting groove portion 32 of the first inner fitting step portion 39a and the inner fitting convex portion 31 of the second inner fitting step portion 39b are formed so as to have substantially the same thickness in the direction Y. It is formed to have substantially the same thickness in the core orthogonal direction Y.
  • the inner fitting end portion 30 of the upper steel pipe pile 3 is connected to the lower steel pipe without the interference between the inner fitting convex portion 31 of the second inner fitting step portion 39b and the outer fitting convex portion 21 of the first outer fitting step portion 29a. It can be inserted into the external fitting end 20 of the pile 2.
  • the lower steel pipe pile 2 and the upper steel pipe pile 3 are relatively rotated in the circumferential direction Z around the axis. Accordingly, the inner fitting convex portion 31 moves in the circumferential direction Z to the lower side of the outer fitting convex portion 21 and is engaged with the outer fitting convex portion 21 in the axial direction X as shown in FIGS. 16 and 17. The Thus, the outer fitting end 20 of the lower steel pipe pile 2 and the inner fitting end 30 of the upper steel pipe pile 3 are fitted to each other.
  • the first taper portion 21a and the second taper portion 23a shown in FIG. 5 and the third taper portion 31a and the fourth taper portion 31b shown in FIG. It has a predetermined height h in the axial direction X. These heights h are set to be substantially the same as the height of the gap d formed between the distal end portion 28 of the outer fitting end portion 20 and the inner fitting edge portion 38 of the inner fitting end portion 30.
  • the third taper portion 31a (see FIG. 9) is brought into contact with the first taper portion 21a (see FIG. 5), and the fourth taper portion 23a (see FIG. 5) is fourth.
  • the taper part 31b (refer FIG. 9) is made to contact, and the internal fitting convex part 31 of the upper steel pipe pile 3 is moved to the circumferential direction Z by the outer fitting engagement groove 23 of the lower steel pipe pile 2.
  • FIG. For this reason, the lower steel pipe pile 2 and the upper steel pipe pile 3 approach the axial direction X, and the front end portion 28 of the outer fitting end portion 20 and the inner fitting edge portion 38 of the inner fitting end portion 30 fill the gap d. Will come into contact.
  • the fitting edge 38 is brought into contact with the gap d. Therefore, it is possible to determine whether or not the outer fitting end portion 20 of the lower steel pipe pile 2 and the inner fitting end portion 30 of the upper steel pipe pile 3 are completely fitted by visually observing the gap d from the outside. . Further, after fitting the outer fitting end 20 of the lower steel pipe pile 2 and the inner fitting end 30 of the upper steel pipe pile 3, whether or not the clearance gauge passes through the gap d by applying a gap gauge to the gap d. Thus, the fitting between the outer fitting end 20 and the inner fitting end 30 may be confirmed. In this case, it is possible to reliably determine whether or not the outer fitting end portion 20 and the inner fitting end portion 30 are fitted, as compared with the above visual recognition method.
  • the third taper portion 31a (see FIG. 9) is brought into contact with the first taper portion 21a (see FIG. 5), and the fourth taper is placed on the second taper portion 23a (see FIG. 5).
  • the portion 31b (see FIG. 9)
  • the inner fitting convex portion 31 of the upper steel pipe pile 3 can be smoothly moved in the circumferential direction Z by the outer fitting engagement groove 23 of the lower steel pipe pile 2.
  • the fitting between the outer fitting end 20 of the steel pipe pile 2 and the inner fitting end 30 of the upper steel pipe pile 3 can be facilitated.
  • the internal fitting convex part 31 of the upper steel pipe pile 3 is latched by the latching
  • the internal fitting convex part 31 formed in 39b is engaged, and a bending load and a tensile load are transmitted to the main body of a steel pipe pile.
  • the external fitting convex part 21 formed in the 1st external fitting step part 29a and the external fitting convex part 21 formed in the 2nd external fitting step part 29b are the positions of the axial direction X. Is provided. For this reason, in the joint structure 1 of a steel pipe pile, the lower steel pipe pile 2 and the upper steel pipe pile 3 can be connected without a cross-sectional defect
  • the outer fitting convex part 21 and the inner fitting convex part 31 are the state in which the outer fitting end part 20 of the lower steel pipe pile 2 and the inner fitting end part 30 of the upper steel pipe pile 3 were mutually fitted. It is possible to avoid a decrease in the bending load and the tensile load that can be transmitted due to a cross-sectional defect in the axial direction view.
  • the outer fitting convex portion 21 formed on the first outer fitting step portion 29a and the outer fitting convex portion 21 formed on the second outer fitting step portion 29b shift the position in the axial direction X. Therefore, the bending load and the tensile load borne by the outer fitting convex portion 21 and the inner fitting convex portion 31 can be made uniform in the circumferential direction Z. For this reason, in the joint structure 1, it is possible to avoid the bending load and the tensile load from being concentrated on some of the outer fitting convex portions 21 and the inner fitting convex portions 31 in the circumferential direction Z.
  • the outer fitting convex portion 21 and the inner fitting convex portion 31 are one step (one row), and the lower steel pipe pile 2 It is sufficient that the plate thickness of the upper steel pipe pile 3 is large enough to withstand the bending load and tensile load of this one stage.
  • the step number (row number) of the external fitting convex part 21 and the internal fitting convex part 31 increases, and the lower steel pipe pile 2 and the upper steel pipe pile 3 of FIG. It is necessary to set the plate thickness according to the thickness.
  • the outer fitting stepped portion 29 and the inner fitting stepped portion 39 are formed by gradually increasing the plate thickness of the lower steel pipe pile 2 and the upper steel pipe pile 3.
  • the external fitting convex part 21 formed in the 1st external fitting step part 29a and the external fitting convex part 21 formed in the 2nd external fitting step part 29b are the positions of the axial direction X. Is provided.
  • the first outer fitting step portion 29a and the second outer fitting step portion 29b The lower steel pipe pile 2 and the upper steel pipe pile in which any of the outer fitting convex portions 21 and the inner fitting convex portions 31 of the first inner fitting step portion 39a and the second inner fitting step portion 39b have the maximum tensile stress.
  • the portion 30 can be reliably disposed at a portion corresponding to the outermost edge portion of the third edge. Therefore, in the joint structure 1, the outer fitting end portion 20 of the lower steel pipe pile 2 and the inner fitting end of the upper steel pipe pile 3 are surely borne by one of the outer fitting convex portions 21 and the inner fitting convex portion 31. It is possible to avoid the portion 30 from being damaged.
  • the outer fitting end portion 20 has a plurality of step portions (first outer fitting step portion 29a, second outer fitting step portion 29b), and the inner fitting end portion 30 has a plurality of step portions (first step).
  • first outer fitting step portion 29a, second outer fitting step portion 29b The case where it has the 1 internal fitting step part 39a and the 2nd internal fitting step part 39b) was shown.
  • the outer fitting end portion 20 and the inner fitting end portion 30 each have one step portion (the outer fitting step portion 29 and the inner fitting step portion 39), and the outer fitting convex portion. 21 and the inner fitting convex part 31 may be formed by shifting the positions in the axial direction X.
  • the first outer fitting step portion 29a and the second outer fitting step portion 29b are formed with one step (one row) of the outer fitting convex portion 21, and the first inner fitting step portion 39a and The case where the internal fitting convex part 31 was formed in 1 step
  • the outer fitting convex portion 21 is formed in two steps (two rows) in the first outer fitting step portion 29a, and the outer fitting convex portion 21 is formed in one step in the second outer fitting step portion 29b. (One row) may be formed.
  • the external fitting convex portions 21 and the external fitting groove portions 22 are formed in a plurality of rows in the axial direction X, and along the axial direction X.
  • the outer fitting convex portion 21 in one row and the outer fitting groove portion 22 in the other row are viewed from the axial direction. In such a case, it may be formed so as to be adjacent to each other in the axis orthogonal direction Y.
  • the three external fitting step portions 29 (29 a, 29 b, 29 c) arranged in the axial direction X of the lower steel pipe pile 2 are outside.
  • Three internal fitting step portions 39 (39a, 39b, 39c) provided in the fitting end portion 20 and arranged in the axial direction X of the upper steel pipe pile 3 are provided in the internal fitting end portion 30.
  • the outer fitting step portion 29 includes the outer fitting convex portion 21 of the first outer fitting step portion 29a on the outer side (upper side) in the axial direction X of the lower steel pipe pile 2, and the lower steel pipe pile 2 from the first outer fitting step portion 29a.
  • the outer fitting groove portion 22 of the second outer fitting step portion 29b on the inner side (lower side) in the axial direction X has substantially the same thickness in the axial direction perpendicular to the axial direction Y of the lower steel pipe pile 2, and the second outer The outer fitting convex portion 21 of the fitting step portion 29b and the outer fitting groove portion 22 of the third outer fitting step portion 29c on the inner side (lower side) in the axial direction X of the lower steel pipe pile 2 from the second outer fitting step portion 29b.
  • the lower steel pipe pile 2 is formed by gradually increasing the thickness of the lower steel pipe pile 2 in the axial direction X so as to have substantially the same thickness in the axial direction orthogonal to the axial direction Y of the lower steel pipe pile 2.
  • the outer fitting convex portion 21 formed on the first outer fitting step portion 29a and the outer fitting convex portion 21 formed on the second outer fitting step portion 29b are provided by shifting the position in the axial direction X.
  • the external fitting convex part 21 formed in the 2nd external fitting step part 29b and the external fitting convex part 21 formed in the 3rd external fitting step part 29c are provided by shifting the position of the axial direction X. .
  • the external fitting convex part 21 is formed.
  • the outer fitting convex portion 21 of the third outer fitting step portion 29c is formed in all of the outer fitting groove portion 22 formed in the second outer fitting step portion 29b and the position adjacent to the axial direction orthogonal Y in the axial direction. Is formed.
  • the outer fitting convex portion 21 of the first outer fitting step portion 29a and the outer fitting convex portion 21 of the second outer fitting step portion 29b are alternately formed without any gap in the circumferential direction Z as viewed in the axial direction
  • the outer fitting convex portion 21 of the second outer fitting step portion 29b and the outer fitting convex portion 21 of the third outer fitting step portion 29c are alternately formed without a gap in the circumferential direction Z when viewed in the axial direction.
  • the outer fitting convex part 21 of the second outer fitting step part 29b may be formed, and the outer fitting groove part 22 formed in the second outer fitting step part 29b and the axial center orthogonal direction Y in the axial direction view.
  • the external fitting convex part 21 of the 3rd external fitting step part 29c may be formed in a part of adjacent position.
  • the outer fitting convex portion 21 of the first outer fitting step portion 29a and the outer fitting convex portion 21 of the second outer fitting step portion 29b are alternately formed with a gap in the circumferential direction Z as viewed in the axial direction.
  • the outer fitting convex portion 21 of the second outer fitting step portion 29b and the outer fitting convex portion 21 of the third outer fitting step portion 29c are alternately arranged with a gap in the circumferential direction Z as viewed in the axial direction. It is formed.
  • the inner fitting step portion 39 includes an inner fitting groove portion 32 of the first inner fitting step portion 39a on the inner side (upper side) in the axial direction X of the upper steel pipe pile 3, and the axis of the upper steel pipe pile 3 from the first inner fitting step portion 39a.
  • the inner protrusions 31 of the second inner fitting step 39b on the outer side (lower side) of the core direction X have substantially the same thickness in the direction Y perpendicular to the axial center of the upper steel pipe pile 3, and the second inner The inner fitting groove portion 32 of the fitting step portion 39b and the inner fitting convex portion 31 of the third inner fitting step portion 39c on the outer side (lower side) in the axial direction X from the second inner fitting step portion 39b are perpendicular to the axial center direction.
  • the upper steel pipe pile 3 is formed by gradually increasing the plate thickness in the axial direction X so as to have substantially the same thickness as Y.
  • the inner fitting convex portion 31 formed on the first inner fitting step portion 39a and the inner fitting convex portion 31 formed on the second inner fitting step portion 39b are provided by shifting the position in the axial direction X.
  • the inner fitting convex portion 31 formed on the second inner fitting step portion 39b and the inner fitting convex portion 31 formed on the third inner fitting step portion 39c are provided with the positions in the axial direction X being shifted.
  • An internally fitted convex portion 31 is formed.
  • the inner fitting convex portion 31 of the third inner fitting step portion 39c is formed in all of the inner fitting groove portion 32 formed in the second inner fitting step portion 39b and the position adjacent to the axial center orthogonal direction Y in the axial direction. Is formed. Therefore, the inner fitting convex portion 31 of the first inner fitting step portion 39a and the inner fitting convex portion 31 of the second inner fitting step portion 39b are alternately formed without gaps in the circumferential direction Z as viewed in the axial direction.
  • the inner fitting convex portions 31 of the second inner fitting step portion 39b and the inner fitting convex portions 31 of the third inner fitting step portion 39c are alternately formed without any gap in the circumferential direction Z as viewed in the axial direction.
  • the internal fitting convex part 31 of the 2nd internal fitting step part 39b may be formed.
  • the inner fitting convex portion of the third inner fitting step portion 39c is formed in a part of the inner fitting groove portion 32 formed in the second inner fitting step portion 39b and the position adjacent to the axial direction orthogonal to the axial direction Y as viewed in the axial direction. 31 may be formed.
  • the inner fitting convex portion 31 is configured so that the inner fitting convex portion 31 of the first inner fitting step portion 39a and the inner fitting convex portion 31 of the second inner fitting step portion 39b are arranged in the circumferential direction Z in the axial direction view.
  • the inner fitting convex portions 31 of the second inner fitting step portion 39b and the inner fitting convex portions 31 of the third inner fitting step portion 39c are formed in a gap in the circumferential direction Z as viewed in the axial direction. It is formed alternately with a gap.
  • the inner fitting end portion 30 of the upper steel pipe pile 3 is inserted in the axial direction X into the outer fitting end portion 20 of the lower steel pipe pile 2. Accordingly, as shown in FIG. 23 and FIG. 24, the inner fitting convex portion 31 of the first inner fitting step portion 39a passes through the outer fitting groove portion 22 of the first outer fitting step portion 29a, and the first outer fitting step portion 29a. It abuts on the lower end surface of the outer fitting engagement groove 23 of the portion 29a. Further, the inner fitting convex portion 31 of the second inner fitting step portion 39b passes through the outer fitting groove portion 22 of the second outer fitting step portion 29b and is below the outer fitting engagement groove 23 of the second outer fitting step portion 29b. It abuts on the end face.
  • the inner fitting convex portion 31 of the third inner fitting step portion 39c passes through the outer fitting groove portion 22 of the third outer fitting step portion 29c and is below the outer fitting engagement groove 23 of the third outer fitting step portion 29c. It abuts on the end face.
  • the outer fitting convex portion 21 of the first outer fitting step portion 29a and the outer fitting groove portion 22 of the second outer fitting step portion 29b are substantially the same in the direction Y perpendicular to the axis of the lower steel pipe pile 2.
  • the inner fitting groove portion 32 of the first inner fitting step portion 39a and the inner fitting convex portion 31 of the second inner fitting step portion 39b are formed in the direction Y perpendicular to the axis of the upper steel pipe pile 3 while being formed to have a thickness. It is formed to have substantially the same thickness.
  • outer fitting convex portion 21 of the second outer fitting step portion 29b and the outer fitting groove portion 22 of the third outer fitting step portion 29c are formed to have substantially the same thickness in the direction Y perpendicular to the axis of the lower steel pipe pile 2.
  • the inner fitting groove 32 of the second inner fitting step 39b and the inner fitting convex portion 31 of the third inner fitting step 39c have substantially the same thickness in the direction Y perpendicular to the axis of the upper steel pipe pile 3. Is formed.
  • the inner fitting end 30 of the upper steel pipe pile 3 includes the inner fitting convex portion 31 of the third inner fitting step portion 39c, and the outer fitting convex portion of the first outer fitting step portion 29a and the second outer fitting step portion 29b.
  • the end of the external fitting end 20 is inserted in the state where the internal fitting end 30 of the upper steel pipe pile 3 is inserted into the external fitting end 20 of the lower steel pipe pile 2.
  • a gap d having a predetermined height in the axial direction X is formed between the portion 28 and the inner fitting edge portion 38 of the inner fitting end portion 30.
  • the lower steel pipe pile 2 and the upper steel pipe pile 3 are relatively rotated in the circumferential direction Z around the axis. Accordingly, as shown in FIGS. 26 and 27, the inner fitting convex portion 31 moves in the circumferential direction Z in the outer fitting engaging groove 23 to the lower side of the outer fitting convex portion 21.
  • the inner fitting convex portion 31 is engaged with the outer fitting convex portion 21 in the axial direction X, and the outer fitting end portion 20 of the lower steel pipe pile 2 and the inner fitting end portion 30 of the upper steel pipe pile 3 are fitted to each other.
  • the third tapered portion 31a (see FIG. 9) is brought into contact with the first tapered portion 21a (see FIG. 5), and the second tapered portion 23a (see FIG. 5).
  • 4th taper part 31b (refer FIG. 9) is made to contact
  • the lower steel pipe pile 2 and the upper steel pipe pile 3 approach in the axial direction X, and the front end portion 28 of the outer fitting end portion 20 and the inner fitting edge portion 38 of the inner fitting end portion 30 fill the gap d. Will come into contact.
  • the outer fitting end portion 20 in a state where the outer fitting convex portion 21 and the inner fitting convex portion 31 are engaged in the axial direction X.
  • the leading end portion 28 and the inner fitting edge portion 38 of the inner fitting end portion 30 are in contact with each other while filling the gap d. Therefore, whether or not the outer fitting end 20 of the lower steel pipe pile 2 and the inner fitting end 30 of the upper steel pipe pile 3 are completely fitted can be determined by visually observing the gap d from the outside. .
  • the gap d After fitting the outer fitting end 20 of the lower steel pipe pile 2 and the inner fitting end 30 of the upper steel pipe pile 3, the gap d The fitting between the outer fitting end portion 20 and the inner fitting end portion 30 may be confirmed by applying a gap gauge and determining whether or not the gap gauge passes through the gap d. In this case, it is possible to reliably determine whether or not the outer fitting end portion 20 and the inner fitting end portion 30 are fitted, as compared with the above visual recognition method.
  • the second embodiment is the same as the first embodiment, but as shown in FIG. 27, the third tapered portion 31a (see FIG. 9) is brought into contact with the first tapered portion 21a (see FIG. 5).
  • the fourth taper portion 31b (see FIG. 9) is brought into contact with the second taper portion 23a (see FIG. 5), so that the inner fitting convex portion 31 of the upper steel pipe pile 3 is engaged with the outer fitting of the lower steel pipe pile 2.
  • the groove 23 can be smoothly moved in the circumferential direction Z. For this reason, fitting with the external fitting end part 20 of the lower steel pipe pile 2 and the internal fitting end part 30 of the upper steel pipe pile 3 becomes easy. Moreover, since the inner fitting convex part 31 is latched by the latching
  • the first external fitting step is performed with the outer fitting end 20 of the lower steel pipe pile 2 and the inner fitting end 30 of the upper steel pipe pile 3 fitted to each other.
  • the inner fitting convex portion 31 of the first inner fitting step portion 39a is engaged with the outer fitting convex portion 21 of the portion 29a
  • the second inner fitting step portion 39b is engaged with the outer fitting convex portion 21 of the second outer fitting step portion 29b.
  • the inner fitting convex portion 31 of the third inner fitting step portion 39c is engaged with the outer fitting convex portion 21 of the third outer fitting step portion 29c.
  • outer fitting convex portion 21 of the first outer fitting step portion 29a and the outer fitting convex portion 21 of the second outer fitting step portion 29b are provided by shifting the position in the axial direction X
  • the outer fitting convex part 21 of 29b and the outer fitting convex part 21 of the 3rd external fitting step part 29c are provided by shifting the position of the axial direction X.
  • the outer fitting end 20 of the lower steel pipe pile 2 and the inner fitting end 30 of the upper steel pipe pile 3 are fitted to each other, It is possible to avoid the bending load and the tensile load that can be transmitted by the fitting convex portion 21 and the inner fitting convex portion 31 from being reduced due to a cross-sectional defect in the axial direction view. For this reason, in order to endure a predetermined bending load and tensile load, it is not necessary to enlarge the outer fitting convex part 21 and the inner fitting convex part 31 by the cross-sectional defect, and the outer fitting step part 29 and the inner fitting. Since it is not necessary to increase the number of steps of the step portion 39 in the axial direction X, it is possible to avoid an increase in processing cost and material cost of the joint structure of the steel pipe pile.
  • the outer fitting convex portion 21 of the first outer fitting step portion 29a and the outer fitting convex portion 21 of the second outer fitting step portion 29b are provided by shifting the position in the axial direction X. Since the outer fitting convex portion 21 of the second outer fitting step portion 29b and the outer fitting convex portion 21 of the third outer fitting step portion 29c are provided by shifting the position in the axial direction X, the outer fitting convex portion 21 and the inner fitting convex portion 21 are provided.
  • the bending load and the tensile load borne by the convex portion 31 can be made uniform in the circumferential direction Z.
  • the external fitting convex part 21 and the internal fitting convex part 31 are 1 step
  • the second outer fitting step portion 29b and the second inner fitting step portion 39b the number of steps (number of rows) of the outer fitting convex portion 21 and the inner fitting convex portion 31 increases, and the third outer fitting step portion 29c and the third inner fitting step portion 29b increase.
  • the lower steel pipe pile 2 is directed from the outer side (upper side) in the axial direction X to the inner side (lower side) and from the outer side (lower side) in the axial direction X of the upper steel pipe pile 3 to the inner side (upper side).
  • the outer fitting stepped portion 29 and the inner fitting stepped portion 39 are formed by gradually increasing the plate thickness of the lower steel pipe pile 2 and the upper steel pipe pile 3.
  • the outer fitting convex portion 21 of the first outer fitting step portion 29a and the outer fitting convex portion 21 of the second outer fitting step portion 29b are provided by shifting the position in the axial direction X
  • the outer fitting convex portion 21 of the second outer fitting step portion 29b and the outer fitting convex portion 21 of the third outer fitting step portion 29c are provided by shifting the position in the axial direction X.
  • the bending load is reliably borne by either the external fitting convex part 21 and the internal fitting convex part 31, and the external fitting end part 20 of the lower steel pipe pile 2 and the upper steel pipe pile 3 are used. It is possible to avoid the internal fitting end portion 30 from being damaged.
  • the number of steps of the outer fitting step portion 29 and the inner fitting step portion 39 is 3, respectively, and the outer fitting convex portion 21 of the first outer fitting step portion 29a and the outer fitting step of the second outer fitting step portion 29b.
  • the convex portion 21 is provided by shifting the position in the axial direction X, and the external fitting convex portion 21 of the second external fitting step portion 29b and the external fitting convex portion 21 of the third external fitting step portion 29c are provided as the axial core. The case where the position in the direction X is shifted is shown.
  • the present invention is not limited to the above, and for example, the outer fitting convex portion 21 of the first outer fitting step portion 29a and the outer fitting convex portion 21 of the second outer fitting step portion 29b are provided with the positions in the axial direction X shifted.
  • the outer fitting convex portion 21 of the second outer fitting step portion 29b and the outer fitting convex portion 21 of the third outer fitting step portion 29c may be provided so as to match the position in the axial direction X. Also in this case, there is no cross-sectional defect in the axial direction view, and the load transmitted from the outer fitting convex portion 21 and the inner fitting convex portion 31 to the main body of the steel pipe pile can be made uniform in the circumferential direction. .
  • the external fitting convex portion of the external fitting step portion 29 located on the outermost side (upper side) in the axial direction X. 21 and the outer fitting convex portion 21 of the at least one outer fitting step portion 29 located on the inner side (lower side) in the axial direction X may be provided by shifting the position in the axial direction X.
  • the outer fitting convex portion 21 of one outer fitting step portion 29 and the other outer fitting step portion 29 in at least one (one set) of the adjacent outer fitting step portions 29 among the plural outer fitting step portions 29 adjacent to each other, the outer fitting convex portion 21 of one outer fitting step portion 29 and the other outer fitting step portion 29.
  • the outer fitting groove part 22 of the fitting step part 29 should just be provided so that it may adjoin in the axial center orthogonal direction Y, when it sees from the axial direction X.
  • the number of steps of the outer fitting step portion 29 and the inner fitting step portion 39 is two is shown, and in the second embodiment, the number of steps of the outer fitting step portion 29 and the inner fitting step portion 39 is three, respectively.
  • the number of steps is two.
  • the thicknesses of the outer fitting step portion and the inner fitting step portion (outside in the axial direction X) of the steel pipe pile are inevitably small. The smaller the thickness of the tip, the easier it is to break due to load. As a result, the joint structure is easily broken.
  • the thickness of the outer fitting step portion and the tip end portion (outside of the axial direction X) of the inner fitting step portion is maintained at a certain level or more and the inner thickness in the axial direction X is maintained. Can be thinned. For this reason, the material cost increase by the plate
  • a joint structure in which the lower steel pipe pile 2 (first steel pipe pile) includes the inner fitting end portion 30 and the upper steel pipe pile 3 (second steel pipe pile) includes the outer fitting end portion 20 may be employed.
  • FIG. for example, as a rotation preventing means, a screw may be inserted into the lower steel pipe pile 2 in a state where the lower steel pipe pile 2 and the upper steel pipe pile 3 are connected in the axial direction X to prevent reverse rotation.
  • the outer fitting end portion 20 may be arranged with any number of steps of the outer fitting step portion 29 in the axial direction X of the lower steel pipe pile 2, and the inner fitting end portion 30 may have the axis of the upper steel pipe pile 3. Any number of internal fitting step portions 39 may be arranged in the direction X.

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PCT/JP2013/080748 2012-11-21 2013-11-14 鋼管杭の継手構造、及び鋼管杭 WO2014080824A1 (ja)

Priority Applications (6)

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SG11201408621VA SG11201408621VA (en) 2012-11-21 2013-11-14 Joint structure of steel-pipe pile, and steel-pipe pile
CN201380040518.1A CN104508210B (zh) 2012-11-21 2013-11-14 钢管桩的接头构造以及钢管桩
EP13857558.4A EP2924169B1 (en) 2012-11-21 2013-11-14 Joint structure of steel-pipe pile, and steel-pipe pile
JP2014548535A JP5811289B2 (ja) 2012-11-21 2013-11-14 鋼管杭の継手構造、及び鋼管杭
IN11226DEN2014 IN2014DN11226A (tr) 2012-11-21 2013-11-14
HK15107506.5A HK1207133A1 (en) 2012-11-21 2015-08-05 Joint structure for steel-pipe pile, and steel-pipe pile

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JP2012-255304 2012-11-21
JP2012255304 2012-11-21

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JP2015086619A (ja) * 2013-10-31 2015-05-07 シントク工業株式会社 鋼管杭接続構造
WO2016013328A1 (ja) * 2014-07-24 2016-01-28 新日鐵住金株式会社 鋼管杭の継手構造
JP2016029250A (ja) * 2014-07-24 2016-03-03 新日鐵住金株式会社 鋼管杭の継手構造
WO2023179562A1 (zh) * 2022-03-24 2023-09-28 昊恒（福建）建材科技有限公司 钢结构套管

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SG11201803193TA (en) * 2015-11-27 2018-05-30 Nippon Steel & Sumitomo Metal Corp Joint structure for steel pipe pile
CN105544527A (zh) * 2015-12-14 2016-05-04 中铁大桥局第七工程有限公司 一种带有拆卸式刃脚的钢管桩
KR102401773B1 (ko) * 2016-03-24 2022-05-25 아치 엔터프라이즈 인코포레이티드 모듈형 유틸리티 시스템
CN106015238B (zh) * 2016-06-02 2019-01-22 北京航空航天大学 具有容错特性的旋转驱动对接机构
CN106703020A (zh) * 2016-12-30 2017-05-24 重庆中材参天建材有限公司 超长水下桩基础用可回收的标准钢护筒
JP6897514B2 (ja) * 2017-11-14 2021-06-30 日本製鉄株式会社 鋼管杭の継手構造
CN108999342B (zh) * 2018-09-11 2023-06-20 深圳大学 预制模块化装配式框架结构柱-柱连接节点及制作方法
CN109610448A (zh) * 2018-10-15 2019-04-12 板垣次男 钢管桩连接套结构
CN109914421A (zh) * 2019-03-01 2019-06-21 华北水利水电大学 一种基坑边坡加固用可回收微型桩钢管及其施工方法
CN110438982A (zh) * 2019-08-12 2019-11-12 中国建筑第二工程局有限公司 一种管桩端板以及管桩连接方法
CN111411738B (zh) * 2020-03-26 2021-08-31 上海市房屋建筑设计院有限公司 一种定制波形钢管柱
CN111677024B (zh) * 2020-06-19 2021-04-20 南京工业大学 一种可回收的螺旋钢管桩自平衡测试装置
CN112253530B (zh) * 2020-10-30 2022-08-05 重庆水泵厂有限责任公司 互锁式定位结构与平衡鼓轴向定位方法
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TW201435224A (zh) 2014-09-16
JP5811289B2 (ja) 2015-11-11
CN104508210B (zh) 2016-12-14
JPWO2014080824A1 (ja) 2017-01-05
IN2014DN11226A (tr) 2015-10-02
CN104508210A (zh) 2015-04-08
HK1207133A1 (en) 2016-01-22
EP2924169B1 (en) 2017-06-21

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