WO2020166607A1 - 杭体継手、杭体連結構造及び杭体連結方法 - Google Patents
杭体継手、杭体連結構造及び杭体連結方法 Download PDFInfo
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- WO2020166607A1 WO2020166607A1 PCT/JP2020/005338 JP2020005338W WO2020166607A1 WO 2020166607 A1 WO2020166607 A1 WO 2020166607A1 JP 2020005338 W JP2020005338 W JP 2020005338W WO 2020166607 A1 WO2020166607 A1 WO 2020166607A1
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- Prior art keywords
- pile body
- pile
- joint
- fitting
- protrusion
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000003014 reinforcing effect Effects 0.000 claims description 33
- 230000002093 peripheral effect Effects 0.000 claims description 31
- 238000003780 insertion Methods 0.000 claims description 24
- 230000037431 insertion Effects 0.000 claims description 24
- 230000002265 prevention Effects 0.000 claims description 8
- 238000003466 welding Methods 0.000 description 14
- 210000000078 claw Anatomy 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 10
- 239000011324 bead Substances 0.000 description 9
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 238000009933 burial Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
-
- 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
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
Definitions
- the present invention relates to a pile joint, a pile connecting structure, and a pile connecting method.
- piles buried in the ground are not long enough, multiple piles may be connected and buried.
- Patent Document 1 discloses connecting a plurality of cylindrical excavation members with a cylindrical joint member.
- a claw is provided on the outer periphery of one end of the cylindrical excavation member, and the joint member fits and positions the claw.
- an object of the present invention is to provide a pile body joint, a pile body connection structure, and a pile body connection method that can firmly integrate piles to be connected.
- a pile body joint of the present invention is a pile body joint which connects two pile bodies, and a tubular main part into which the pile body provided with a projection on a peripheral surface is fitted from an end, and the pile body.
- a first shape having a surface that slopes away from the end portion or a second shape that fits between the protrusion and the pile body is formed.
- the fitting portion is formed with the first shape having a surface inclined so as to separate from the end portion of the main body portion in the rotation direction of the pile body, so that the pile body is fitted to the pile body joint.
- the pile body advances in the fitted direction, in other words, in the direction of the other pile body connected by the pile body joint.
- the ends of the two piles connected to each other come into contact with each other, and the inclined surface of the fitting portion and the surface of the projecting portion opposite thereto also come into contact with each other, so that the two piles and the pile joint are connected. Tighten with. Due to the first shape formed in the fitting portion in this way, the two pile bodies and the pile body joint to be connected can be firmly integrated.
- the fitting portion is formed with the second shape that fits between the protrusion and the pile body, a so-called wedge effect is generated between the protrusion and the fitting portion, for example, a buried pile. It is possible to prevent the occurrence of displacement between the protrusion and the fitting portion that may occur when the body is pulled out. Due to the second shape formed in the fitting portion in this manner, the pile body and the pile body joint can be firmly integrated.
- the second shape may be formed on the surface forming the first shape on the fitting portion. According to this configuration, the two piles to be connected and the pile body joint can be more firmly integrated.
- the protrusion may be flat, and the inside of the plane may be hollowed out.
- a bead welding mark
- the bead is formed inside the plane by welding the inside of the flat surface that is hollowed out, and it is possible to prevent the bead from interfering with the fitting between the protrusion and the fitting portion. ..
- the pile body is provided with a plurality of the protrusions arranged at non-equal angular intervals in the circumferential direction, and the main body portion has a plurality of protrusions corresponding to the plurality of protrusions.
- the fitting portion may be formed. According to this structure, the strength of the connected pile body can be increased with a simple structure by providing the protrusion at a position in the cross-sectional direction where it is desired to give relatively high strength to the pile body.
- the main body portion may be provided with a reinforcing member that covers at least the fitting portion. According to this configuration, the strength of the region of the main body in which the fitting portion is formed is relatively reduced, so that the reduced strength can be increased by the reinforcing member.
- the pile body joint of the present invention may be equipped with a disengagement prevention member that is fixed to the reinforcing member and that prevents the protrusion from coming off the fitting portion.
- the fixing method of the disengagement prevention member to the reinforcing member according to this configuration is, for example, bolting or a method of inserting a pin formed in the disengagement prevention member into a hole formed in the reinforcing member, whereby the pile body is inserted from the fitting part It is possible to reliably prevent the protrusion provided on the base from coming off.
- a hole for confirming the insertion of the protrusion into the fitting portion may be formed in the reinforcing member. According to this configuration, even if the reinforcing member is provided, the operator can visually check the insertion state of the protrusion into the fitting portion.
- a plurality of the first shapes or a plurality of the second shapes may be formed in the fitting portion in the axial direction of the pile body. According to this configuration, since a plurality of the first shapes or the second shapes are formed in one fitting portion, the pile bodies to be connected can be firmly integrated.
- one of the two pile bodies is the pile body that is buried in the ground, and the other pile body is the one pile body that is buried. It is a pile body used as an auxiliary for that, and may be arranged above the one pile body. According to this configuration, by connecting the other pile body used for assisting the burying of one pile body by the pile body joint, the pile body can be buried without being suspended.
- the pile body connection structure of the present invention has a pile body in which the protrusion is provided on the peripheral surface, and a tubular main body into which the pile body is fitted from the end, and by fitting and rotating the pile body.
- a first shape having a surface that is inclined to separate from the end portion of the main body portion in the rotation direction of the pile body in the fitting portion that fits into the projection portion, or between the projection portion and the pile body.
- a pile body joint having a second shape formed therein. According to this configuration, the two piles to be connected and the pile body joint can be more firmly integrated.
- the pile body provided with the protrusion on the peripheral surface has a tubular main body into which the pile body is fitted from the end, and the pile body is fitted into the protrusion to rotate.
- a first shape having a surface inclined to separate from the end of the main body in the rotation direction of the pile body, or a second fitting portion fitted between the protrusion and the pile body.
- the pile body provided with the protrusion on the peripheral surface has a tubular main body into which the pile body is fitted from the end, and the pile body is fitted into the protrusion to rotate.
- a first shape having a surface inclined to separate from the end of the main body in the rotation direction of the pile body, or a second fitting portion fitted between the protrusion and the pile body.
- Step a second step of gripping the first pile body by a first gripping means included in the press-fitting machine, and the first grip so that ends of the first pile body and the second pile body contact each other.
- the piles to be connected can be firmly integrated.
- FIG. 4 is a diagram showing a state in which a pile body and a joint are connected. It is a figure which shows the load transmission point of a pile body and a joint at the time of connecting two pile bodies of 1st Embodiment, (a) shows the load transmission point at the time of press-fitting of a pile body, (b) is buried. The load transmission point when the pile body is pulled out is shown, and (c) shows the load transmission point when the pile body is rotated.
- FIG. 1 is an external view of a joint 10 and piles 12 and 12 that constitute the pile connection structure of the present embodiment.
- 1A is a cross-sectional view of the joint 10
- FIG. 1B is a side view of the joint 10
- FIG. 1C is a cross-sectional view of the pile body 12
- FIG. 1D is a side view of the pile body 12. It is a figure.
- the pile body 12 of the present embodiment is, for example, a pile buried in the ground, and a key 14 corresponding to the protrusion of the present invention is provided on the outer peripheral surface 12A thereof.
- a key 14 corresponding to the protrusion of the present invention is provided on the outer peripheral surface 12A thereof.
- Four keys 14 are provided on the outer peripheral surface 12A of the pile body 12, but this is an example, and one or more keys 14 may be provided on the outer peripheral surface 12A of the pile body 12.
- the key 14 has a flat shape, for example, a rectangular shape having four faces.
- the joint 10 connects two piles 12 and 12, and corresponds to the pile joint of the present invention.
- the joint 10 has a tubular main body portion 16 into which the pile body 12 is fitted from the respective end portions 16A and 16A, and the main body portion 16 has an inner circumference thereof so as to cover the outer peripheral surface 12A of the pile body 12.
- the diameter is formed to be slightly larger than the outer diameter of the pile body 12.
- Engaging portions 18 that engage with the keys 14 of the pile body 12 are formed on the main body portion 16 corresponding to the respective end portions 16A and 16A. That is, the joint 10 of the present embodiment has a symmetrical structure in the direction in which the piles 12 are connected (also referred to as the “vertical direction”). In addition, in the main body portion 16 of the present embodiment, four engagement portions 18 are formed in the vertical direction so as to correspond to the pile body 12 provided with the four keys 14.
- the engagement portion 18 is formed of an insertion portion 20 into which the key 14 is inserted from the end portion 16A of the main body portion 16 and a fitting portion 22 that fits into the key 14 by fitting and rotating the pile body 12. To be done.
- the insertion portion 20 is formed in a direction parallel to the axial direction of the pile body 12, and the fitting portion 22 is formed in a direction intersecting the axial direction of the pile body 12.
- the engaging portion 18 of the present embodiment is L-shaped, but not limited to this, the key 14 inserted from the inserting portion 20 is fitted in a direction intersecting the axial direction of the pile body 12.
- the engaging portions 18 may have an inverted T-shape or the like as long as they fit together.
- FIG. 2 is a diagram showing a method of connecting the two piles 12 and 12 provided with the key 14 and the joint 10.
- one pile body 12 is fitted from one end portion 16A of the main body portion 16 and the other pile body 12 is fitted from the other end portion 16A (FIG. 2(a)).
- the key 14 provided on the pile body 12 is fitted and connected to the fitting portion 22 of the joint 10 (FIG. 2B).
- the positions 12B, 12B of the two piles 12, 12 connected by the joint 10 abut each other.
- the positional relationship between the key 14 provided on the pile body 12 and the fitting portion 22 of the joint 10 is such that when the two pile bodies 12 and 12 are connected by the joint 10, the ends of the pile bodies 12 and 12 are connected.
- the positional relationship is such that 12B and 12B contact each other.
- the key 14 is adjusted in accordance with the position of the fitting portion 22 so that the end portions 12B, 12B of the pile bodies 12, 12 come into contact with each other in the central portion in the height direction of the joint 10. It is provided on the pile body 12.
- FIG. 3 is an enlarged view showing a state in which the key 14 and the fitting portion 22 are fitted together.
- FIG. 4 is a vertical cross-sectional view of a portion of the pile body 12 where the key 14 is provided and a portion of the joint 10 where the fitting portion 22 is formed.
- FIG. 4A is a view showing the pile body 12 and the joint 10 individually, and
- FIG. 4B is a view showing a case where the pile body 12 and the joint 10 are connected.
- the fitting portion 22 has a surface 22A that is inclined so as to separate from the end portion 16A of the main body portion 16 in the rotation direction x of the pile body 12, and corresponds to the first shape of the present invention.
- a tapered shape is formed.
- the surface 22A of the fitting portion 22 is inclined in the connecting direction of the two pile bodies 12, 12 to be connected.
- the surface 22B facing the surface 22A is formed parallel to the end portion 16A of the main body portion 16.
- the key 14 has a shape corresponding to the tapered shape of the fitting portion 22. Specifically, the key 14 has surfaces 14 ⁇ /b>A and 14 ⁇ /b>B that intersect with and face each other in the axial direction of the pile body 12.
- the surface 14B is located on the end 12B side of the pile body 12 and is formed parallel to the end 12B of the pile body 12.
- the surface 14A is formed so as to be inclined in a direction approaching the end 12B of the pile body 12.
- the inclination angle of the surface 14A of the key 14 is the same as the inclination angle of the surface 22A of the fitting portion 22.
- the fitting portion 22 is formed with the tapered shape having the inclined surface 22A, when the pile body 12 is fitted into the joint 10 and rotated, the pile body 12 is fitted in the direction in which it is fitted, that is, in other words. Then, it advances toward the other pile body 12 connected by the joint 10. As a result, the end portions 12B and 12B of the two pile bodies 12 and 12 to be connected come into contact with each other, and the inclined surface 22A of the fitting portion 22 and the surface 14A of the key 14 that faces the inclined surface 22A also come into contact with each other. The pile body 12 of the book and the joint 10 are tightened together. With such a simple structure of the tapered shape formed in the fitting portion 22, the two pile bodies 12 and 12 to be connected and the joint 10 are firmly integrated.
- the pile bodies 12 and 12 that are tightened by the joint 10 in which the fitting portion 22 has a taper shape and become a rigid body contact the surface 22B of the fitting portion 22 and the surface 14B of the key 14. Separate without doing.
- the fitting portion 22 is fitted between the key 14 and the pile body 12 to form a wedge shape corresponding to the second shape of the present invention.
- This wedge shape is formed by chamfering in the direction of the pile body 12 connecting the surfaces 22A of the fitting portion 22.
- the surface 22A of the fitting portion 22 of the present embodiment is formed with a wedge shape as well as a taper shape.
- the surface 14A of the key 14 is also formed to be inclined in the direction of the pile body 12 so as to correspond to the wedge shape of the surface 22A of the fitting portion 22. That is, the surface 14A of the key 14 and the outer peripheral surface 12A of the pile body 12 form a V-shape, and the surface 22A of the fitting portion 22 is fitted to the V-shape.
- a so-called wedge effect is generated in the fitting portion 22 and the key 14, and for example, fitting that may occur when the buried pile body 12 is pulled out (direction of arrow y1 in FIG. 4B). It is possible to prevent the misalignment between the joint portion 22 and the key 14. In this way, the pile body 12 and the joint 10 are more firmly integrated by the simple structure of the wedge shape formed in the fitting portion 22.
- a bead (welding mark) is formed on the outer periphery of the key 14, and the bead becomes an obstacle for fitting the key 14 and the fitting portion 22.
- a step of removing the bead by polishing or the like is required. Therefore, the inside of the plane of the key 14 of this embodiment is hollowed out (see FIG. 1). Then, the bead is formed inside the plane of the key 14 by welding the inside of the hollowed out plane, and the bead can be prevented from obstructing the fitting between the key 14 and the fitting portion 22. ..
- the hollow shape 24 of the present embodiment is, for example, a rectangular shape, and three keys 14 are provided along the circumferential direction of the pile body 12.
- one or more hollow shapes 24 may be formed on the key 14, and if the key 14 is formed so that a welding operation can be performed in order to provide the keys 14 on the pile body 12, the shape and size thereof are not limited. Not limited.
- the keys 14 of the present embodiment are arranged in the outer peripheral direction of the pile body 12 at unequal angular intervals.
- the keys 14 shown in FIG. 1C two sets of the opposing keys 14 are provided, and the four keys 14 in total are arranged such that the intervals between the adjacent keys 14 are 120° and 60°. It is arranged.
- the keys 14 by providing the keys 14 at the positions in the cross-sectional direction where it is desired to give relatively high strength to the pile body 12, two linked piles are provided.
- the strength of the bodies 12, 12 can be increased with a simple configuration.
- the positions of the keys 14 are not limited to non-equidistant intervals, and may be arranged at equal angular intervals in the outer peripheral direction. According to this configuration, since it is not necessary to fit the pile body 12 and the joint 10 in consideration of the position of the key 14 provided on the pile body 12, it is possible to easily fit the pile body 12 and the joint 10. ..
- FIG. 5 is a diagram showing load transfer points of the two pile bodies 12 and 12 and the joint 10 when the two pile bodies 12 and 12 are connected.
- FIG. 5( a) shows the load transmission points when the pile body 12 is press-fitted (press-fitting downward y2 to the pile body 12 ). Since a downward force is applied to the pile body 12, when press-fitting the pile body 12, as shown by an arrow A, the end portions 12B, 12B with which the two pile bodies 12, 12 that are connected are in contact with each other as a load transmitting portion. Become.
- FIG. 5( b) shows a load transmission point at the time of pulling out the buried pile body 12 (pulling out in the upward direction y1 with respect to the pile body 12 ). Since an upward force is applied to the pile body 12, when the pile body 12 is pulled out, the tapered shape (wedge shape) of the fitting portion 22 and the key 14 serves as a load transmission point as shown by an arrow B.
- FIG. 5( c) shows a load transmission point (torque transmission point) when the pile body 12 rotates (rotation in the right direction x with respect to the pile body 12 ). Since a force in the right rotation direction is applied to the pile body 12, when the pile body 12 rotates, as shown by an arrow C, the tapered tip portions of the fitting portion 22 and the key 14 serve as load transmitting points.
- FIG. 6 is a diagram showing a process of connecting two piles 12 and 12 and burying them by using a press-fitting machine 30.
- the press-fitting machine 30 holds the one pile 12a by the chuck 32 and embeds it.
- the press-fitting machine 30 grips the other pile body 12b connected to the pile body 12a by the chuck 32.
- the joint 10 is fitted into the pile body 12b, and the joint 10 is rotated to insert the key 14 and the fitting portion. 22 and 22 are fitted together (FIG. 6(a)).
- the pile body 12b in which the joint 10 is fitted is set up with respect to the buried pile body 12a, and the other pile body 12b is rotated so that the two pile bodies 12a and 12b are connected by the joint 10 (FIG. 6).
- standing the pile body 12b in the buried pile body 12a means arranging vertically so that the axis line of the pile body 12a and the axis line of the pile body 12b may correspond.
- the joint 10 is fitted into the buried pile body 12a (FIG. 6(b)), the pile body 12b is set up with respect to the pile body 12a in which the joint 10 is fitted, and two piles are provided. Another pile body 12b may be rotated so that the bodies 12a and 12b are connected by the joint 10 (FIG. 6(c)).
- FIG. 7 to 10 are views showing a form in which the joint 10 is provided with the reinforcing member 40.
- the fitting portion 22 serves as a load transmitting portion, so that the strength in the vicinity of the area where the fitting portion 22 is formed is relatively lower than in other areas. Therefore, the main body portion 16 of the present embodiment is provided with a reinforcing member 40 that covers at least the fitting portion 22, as shown in FIG. 7. According to such a configuration, the strength reduced by forming the fitting portion 22 can be increased by the reinforcing member 40, and the deformation of the joint 10 at the time of load transmission can be suppressed.
- the reinforcing member 40 of the present embodiment covers not only the fitting portion 22 but also the periphery of the insertion portion 20. The reinforcing member 40 is joined to the main body 16 in advance by welding or the like.
- a hole 42 for confirming the insertion of the key 14 is formed in the reinforcing member 40 of this embodiment.
- the holes 42A formed in the reinforcing member 40 are formed, for example, at the position of the insertion portion 20 (hole 42A) and the position of the fitting portion 22 (hole 42B).
- the hole 42A has a circular shape.
- the hole 42B is a rectangle (each round rectangle) having a long surface in a direction intersecting the axial direction of the joint 10, and is formed so as to straddle the upper and lower fitting portions 22.
- FIG. 8 is a diagram showing a method of connecting the two piles 12 and 12 and the joint 10 provided with the reinforcing member 40. Even when the reinforcing member 40 is provided, the method of connecting the pile body 12 and the joint 10 does not change, and the pile body 12 is fitted into each end 16A of the main body 16 of the joint 10 (see FIG. a)), The key 14 and the fitting part 22 are fitted and connected by rotating the pile body 12 (FIG.8(b)).
- the joint 10 of the present embodiment may be provided with a reversing stopper 50A that prevents the key 14 from coming off the fitting portion 22 and corresponds to the detachment preventing member of the present invention.
- FIG. 9A is a view showing a usage example of the reverse rotation stopper 50A, and is a view in which the joint 10 and the reinforcing member 40 are developed in the outer peripheral direction of the pile body 12.
- FIG. 9B is a front view, a top view, and a side view of the reverse rotation stopper 50A.
- FIG. 9C is a view showing the action of the pin 52 formed on the reverse rotation stopper 50A.
- the reverse rotation stopper 50A is inserted into the insertion portion 20 after the piles 12 and 12 are connected by the joint 10.
- the lateral width of the reverse rotation stopper 50A is formed to be slightly smaller than the width of the insertion portion 20 and is shaped so as to follow the outer peripheral surface 12A of the pile body 12.
- the reverse rotation stopper 50A of the present embodiment has a pin 52 corresponding to the hole 42A of the reinforcing member 40, and slits 54 are formed on the left and right of the pin 52. That is, in the reverse rotation stopper 50A, the pin 52 is pushed by the cantilever spring back when it is inserted into the insertion portion 20, and the region between the slit 54 and the slit 54 is bent. Then, when the reverse rotation stopper 50A is inserted until the pin 52 reaches the hole 42A, the pin 52 is caught in the hole 42A. Thereby, the slit 54 is fixed to the insertion portion 20 and prevents the key 14 from coming off the fitting portion 22, so that the pile body 12 fitted in the joint 10 can be reliably prevented from coming off the joint 10.
- FIG. 10 is a view showing a reverse rotation stopper 50B according to another mode of the detachment prevention member of the present invention.
- FIG. 10A is a diagram showing a usage example of the reverse rotation stopper 50B, and is a diagram in which the joint 10 and the reinforcing member 40 are developed in the outer peripheral direction of the pile body 12.
- FIG. 10B is a front view and a top view of the reverse rotation stopper 50B.
- the reverse rotation stopper 50B has a hole 56 corresponding to the hole 42A of the reinforcing member 40, and a female screw is formed in the hole 56.
- the key 14 is provided in one row in the lateral direction of the pile body 12, but the present embodiment is not limited to this, and as shown in FIG. 11, a plurality of rows are provided in the axial direction of the pile body 12. May be provided.
- the joint 10 is formed with a plurality of rows of fitting portions 22 corresponding to the plurality of rows of keys 14.
- the joint 10 is independent of the pile body 12
- the present embodiment is not limited to this, and as shown in FIG. 12, the pile body having two joint bodies 10 is shown. It may be joined to one end of 12.
- FIG. 13 is an external view of the pile body 12 and the joint 10 of this embodiment. 13 that are the same as those in FIGS. 1 to 12 are assigned the same reference numerals as in FIGS.
- the fitting portion 22 formed in the joint 10 of the present embodiment is formed with a plurality of taper shapes and a plurality of wedge shapes in the axial direction of the pile body 12. More specifically, one fitting portion 22 includes a vertical portion 122A parallel to the axial direction of the pile body 12 and a plurality of horizontal portions 122B orthogonal to the vertical portion 122A. That is, each horizontal portion 122B has a tapered shape and a wedge shape on the end 16A side of the joint 10.
- the vertical portion 122A is formed, for example, by extending the tapered shape and the wedge shape of the horizontal portion 122B on the end 16A side of the joint 10.
- the shape of the vertical portion 122A on the side of the end portion 16A of the joint 10 is not limited to this, and may be horizontal.
- the key 14 of the present embodiment has a shape corresponding to the tapered shape and the wedge shape of the fitting portion 22 of the present embodiment. Therefore, the key 14 includes a vertical portion 114A parallel to the axial direction of the pile body 12 and three horizontal portions 114B orthogonal to the vertical portion 114A.
- a plurality of tapered shapes and wedge shapes are formed in one fitting portion 22, so that the pile bodies 12 to be connected can be firmly integrated. Further, as compared with the case of arranging the keys 14 in a plurality of rows as described with reference to FIG. 11 of the first embodiment, the alignment for welding the keys 14 up and down becomes unnecessary, and the work process can be reduced. That is, even in the configuration shown in FIG. 11, since the plurality of fitting portions 22 are installed in the vertical direction, the two pile bodies 12 can be more firmly connected, but the keys 14 are welded in the vertical direction so as not to shift. Process is required. However, in the present embodiment, the keys 14 can be fitted to the plurality of fitting portions 22 simply by welding one key 14.
- three horizontal parts 122B (taper shape and wedge shape) are formed in one fitting part 22, but the present invention is not limited to this, and two horizontal parts are provided in one fitting part 22.
- the part 122B may be formed, or one fitting part 22 may be formed with four or more horizontal parts 122B.
- the key 14 of the present embodiment is formed with the number of horizontal portions 114B corresponding to the shape of the fitting portion 22.
- one of the two pile bodies 12 connected by the joint 10 is used as a pile body 12 to be buried in the ground, and the other pile body 12 is used as an auxiliary for burying one pile body 12.
- the pile body hereinafter, referred to as “simple downing device” 60 (see FIG. 14) is used.
- the simple down stroke device 60 is arranged above the pile body 12 buried in the ground, the simple down stroke device 60 itself is not buried in the ground.
- the simple down stroke device 60 includes a circular tube having the same outer shape as the pile body 12 as a main body portion 60A, and the joint 10 is provided on at least one end of the main body portion 60A.
- the fitting portion 22 of the joint 10 is formed in the circumferential direction of the main body portion 60A.
- the entire length of the main body portion 60A may be a length that can be gripped by the chuck 32 of the press-fitting machine 30, which will be described later, than the pile body 12 buried in the ground.
- FIG. 14 is a diagram showing a process of connecting the simple down stroke device 60 and the pile body 12 and burying the pile body 12 using the press-fitting machine 30. It should be noted that the same components in FIG. 14 as those in FIGS. 1 to 13 are denoted by the same reference numerals as those in FIGS.
- the shape of the fitting portion 22 shown in FIG. 14 is similar to the shape of the fitting portion 22 in FIG. 13, but this is an example, and the other fitting portion 22 shown in FIG. 1 and FIG. The shape may be the same.
- the pile body 12 buried in the ground by using the simple down stroke device 60 is referred to as a lower pile 12c, and the pile body 12 connected to the lower pile 12c is also referred to as an upper pile 12d.
- FIG. 14A shows a state in which the lower pile 12c and the simple down stroke device 60 are connected by the joint 10, and the press-fitting machine 30 is gripping the area including the joint 10.
- the lower pile 12c and the simple downing device 60 are connected by the joint 10 and then gripped by the chuck 32.
- FIG. 15 is a schematic side view of a claw (hereinafter referred to as “step claw”) 70 included in the chuck 32 included in the press-fitting machine 30.
- the chuck 32 rotates by gripping the pile body 12 by pressing the pile body 12 from the outer peripheral side by a plurality of stepped claws 70 provided on the inner periphery thereof.
- the stepped claw 70 has a stepped shape 74 formed on a pressing portion 72 that presses the pile body 12.
- the vertical length y of the stepped shape 74 is equal to or slightly longer than the vertical length of the joint 10 of the simple down stroke device 60.
- the horizontal depth x of the stepped shape 74 is formed to be equal to or slightly deeper than the thickness of the joint 10.
- the pressing portion 72 has a stepped portion into which the joint 10 is fitted when the chuck 32 holds the pile body 12 or the like connected by the joint 10. Then, in the stepped claw 70, the lower side of the stepped shape 74 contacts the lower pile 12c, and the upper side of the stepped shape 74 contacts the main body portion 60A of the simple down stroke device 60.
- step claw 70 can grip the pile body 12 without interfering with the protruding portion of the joint 10 from the outer peripheral portion of the pile body 12, it is possible to grasp the pile body 12 in a wide range.
- FIG. 14(b) shows a state in which the lower pile 12c and the simple down stroke device 60 are connected, and the press-fitting machine 30 is burying the lower pile 12c.
- the chuck 32 holds the main body portion 60 ⁇ /b>A of the simple downing device 60.
- the simple downsizing device 60 is removed from the lower pile 12c.
- the upper pile 12d is connected to the buried lower pile 12c.
- a joint 10 is joined to the end portion 12B of the upper pile 12d of the present embodiment, and the joint 10 connects the lower pile 12c and the upper pile 12d.
- FIG. 14(c) shows a state in which the lower pile 12c and the upper pile 12d are connected and the press-fitting machine 30 further burys the lower pile 12c.
- the press-fitting machine 30 embeds the lower pile 12c and the upper pile 12d in the ground while gripping the upper pile 12d with the chuck 32.
- the method of burying the lower pile 12c using the simple downing device 60 can bury the pile body 12 without using a suspending device. For example, when the lower pile 12c and the upper pile 12d are connected and buried by the joint 10, since the entire length thereof becomes long, the lower pile 12c and the upper pile 12d that are connected using a suspension device are suspended. It was necessary to suspend using the device. However, by using the simple downing device 60 that can be connected to the lower pile 12c by the joint 10, the press-fitting machine 30 can easily bury the pile 12 in the ground without using a suspending device.
- the mode in which the simple down stroke device 60 includes the joint 10 has been described.
- the present invention is not limited to this, and the simple down stroke device 60 does not include the joint 10.
- the key 14 may be provided. That is, the simple down stroke device 60 and the lower pile 12c may be connected by the joint 10 which is a separate body.
- the key 14 is provided on the outer periphery of the upper pile 12d connected to the lower pile 12c, and the key 14 is connected by the joint 10 which is a separate body from the lower pile 12c and the upper pile 12d.
- the simple downing device 60 is not used, and the pile body 12 (upper pile 12d) to which the joint 10 is joined in advance is connected to the lower pile 12c, and the press-fitting machine 30 including the step claw 70 on the chuck 32 is provided.
- the lower pile 12c and the upper pile 12d may be embedded.
- the press-fitting machine 30 of the present embodiment includes a main chuck 32A and a sub-chuck 32B as chucks 32 that grip the pile body 12.
- FIG. 16 is a diagram showing a process of burying the pile body 12 using the press-fitting machine 30 of the present embodiment.
- the joint 10 is preliminarily joined to the upper pile 12d, and the key 14 fitted into the joint 10 is joined to the lower pile 12c.
- Both the main chuck 32A and the sub chuck 32B detachably hold the pile body 12.
- the main chuck 32A is supported so as to be vertically movable relative to the mast 33.
- the sub chuck 32B is provided at a position deviated downward from the moving range of the main chuck 32A.
- the sub-chuck 32B is fixed to the lower end of a guide 33B extending downward from the tips of a pair of mast arm portions 33A provided on the mast 33, and from this lower end of the press-fitting machine 30. It projects toward the front.
- the sub chuck 32B is arranged at a position below the main chuck 32A and spaced apart from the main chuck 32A so as to be coaxial with the main chuck 32A.
- FIG. 17 is a schematic configuration diagram of the sub chuck 32B included in the press-fitting machine 30 of the present embodiment.
- the sub chuck 32B is fixed to the sub chuck 32B along the inner periphery of the insertion hole 80 through which the pile body 12 is inserted with respect to the sub chuck 32B, and is located below the main chuck 32A.
- the pile body 12 is gripped from the outer peripheral side at the position.
- the sub-chuck 32B includes a plurality of holding portions 82 that can extend in the center direction of the insertion hole 80 on the inner circumference of the sub-chuck frame 83.
- a plurality of (four in the example of FIG. 17) holding portions 82 are provided in the circumferential direction of the insertion hole 80, and hold the pile body 12 by pressing it from the outer peripheral side. With such a configuration, the holding portion 82 can hold the pile body 12 regardless of the outer diameter of the pile body 12.
- the configuration of the sub-chuck 32B shown in FIG. 17 is an example, and another configuration may be used as long as the pile body 12 can be gripped.
- the sub-chuck 32B moves each ring band in the radial direction by connecting the plurality of (for example, three divided) arc-shaped ring bands in the circumferential direction and the ends of the ring bands adjacent in the circumferential direction to each other. It may also be configured with a chuck cylinder for performing.
- the three ring bands arranged along the circumferential direction are provided so as to form an annular shape, and the pile body 12 is inserted through the inner circumferential side of the ring band to move the ring bands in the radial direction.
- the pile body 12 is gripped.
- connection is apparent. However, there is a possibility that the connection may be broken during the press-fitting into the ground, or that the bending strength that would otherwise be caused by the connection by the joint 10 may not occur.
- the lower pile 12c is gripped by the sub-chuck 32B to connect the lower pile 12c and the upper pile 12d via the joint 10 using the press-fitting machine 30.
- the embedding method of the present embodiment will be described below with reference to FIG.
- the direction of the arrow in FIG. 16 indicates the direction of the force acting on the pile body 12.
- FIG. 16A shows a state in which the lower pile is gripped by the sub chuck 32B and the upper pile is gripped by the main chuck 32A.
- the main chuck 32A of this embodiment includes the step claw 70 as described in the third embodiment. However, when the main chuck 32A does not hold the joint 10, the step claw 70 is not used. May be.
- FIG. 16B shows a state in which the key 14 of the lower pile 12c is inserted into the joint 10 of the upper pile 12d by moving the main chuck 32A downward.
- FIG. 16C shows a state in which the upper pile 12d is rotated and the key of the lower pile 12c is fitted into the joint 10 of the upper pile 12d.
- 16(b) and 16(c) since the sub chuck 32B holds the lower pile 12c with sufficient force, the load and torque necessary for connecting the lower pile 12c and the upper pile 12d via the joint 10 are obtained.
- the key 14 and the joint 10 can be securely fitted together.
- FIG. 16D shows a state in which the lower pile 12c and the upper pile 12d are connected and the press-fitting machine 30 further burys (press-fits) the lower pile 12c.
- the press-fitting machine 30 presses the lower pile 12c and the upper pile 12d connected by the joint 10 by moving the main chuck 32A downward.
- the sub chuck 32B does not grip the lower pile 12c, that is, does not apply a force to the lower pile 12c.
- the upper pile 12d is held by the main chuck 32A, and the lower pile 12c is held by the sub chuck 32B, while the main chuck 32A is lowered and rotated. 12d and the embedded lower pile 12c are connected by a joint 10.
- the burying method of this embodiment can connect two pile bodies 12 more certainly.
- the upper pile 12d is equipped with the joint 10
- the joint 10 is not provided in the upper pile 12d, but the key 14 is provided in the outer periphery of the upper pile 12d.
- the upper pile 12d and the lower pile 12c may be connected by the joint 10 which is a separate body.
- the main chuck 32A is moved so that the end portions 12B and 12B of the lower pile 12c and the lower pile 12c come into contact with each other, and the main chuck 32A or the sub chuck 32B is rotated, thereby connecting the upper pile 12d and the lower pile 12c with the joint 10.
- the third step may be performed, and the upper pile 12d and the lower pile 12c may be connected by the joint 10 before the lower pile 12c is buried in the ground.
- FIG. 18 is a configuration diagram of the reinforcing member 40 and the reverse rotation stopper 50C of the present embodiment.
- FIG. 18A is an external view (a view in which the joint 10 and the reinforcing member 40 are developed in the outer peripheral direction of the pile body 12)
- FIG. 18B is a view seen from an arrow A in FIG. 18C shows a side view in which the key 14 gets over the reverse rotation stopper 50C and fits into the fitting portion 22.
- the reverse rotation stoppers 50A and 50B described with reference to FIGS. 9 and 10 in the first embodiment have the joint 10 provided with the reinforcing member 40, and after the two pile bodies 12 are connected to each other, It is inserted into the insertion portion 20.
- the reverse rotation stopper 50C of the present embodiment is preliminarily joined to the inner peripheral surface of the reinforcing member 40 (the surface in contact with the pile body 12C) as shown in FIG. 18(b).
- the reverse rotation stopper 50C is joined in front of the fitting portion 22 of the joint 10. That is, as shown in FIG. 18(c), the key 14 inserted in the insertion portion 20 passes over the reverse rotation stopper 50C and is fitted into the fitting portion 22, and is removed from the fitting portion 22 by the reverse rotation stopper 50C. Are prevented (hereinafter also referred to as “lock”).
- the reverse rotation stopper 50C of the present embodiment is, for example, in the shape of a plate, and is tapered on the surface opposite to the fitting portion 22 side so that the key 14 can ride over the reverse rotation stopper 50C and fit into the joint 10.
- a slope 90A is formed.
- the surface of the reverse rotation stopper 50C on the fitting portion 22 side is an orthogonal surface 90B orthogonal to the inner peripheral surface of the reinforcing member 40 so that the key 14 does not come off from the fitting portion 22.
- the tapered slope 14A is formed on the surface of the key 14 that abuts the slope 90A of the reverse rotation stopper 50C, the key 14 can easily get over the reverse rotation stopper 50C.
- the reverse rotation stopper 50C does not necessarily have to be provided for each fitting portion 22, and at least one reverse fitting stopper may be joined to the plurality of fitting portions 22 formed on the joint 10. In the example of FIG. 18, two reverse rotation stoppers 50C are joined to the four fitting portions 22.
- the configuration of the present embodiment is simpler than the configurations shown in FIGS. 9 and 10, and thus the cost can be reduced.
- the key 14 is locked to the joint 10 in the process of rotating the pile body 12 to fit the key 14 into the joint 10, so that the work process for locking the key 14 is performed. Is not required separately.
- the fitting portion 22 has the tapered shape and the wedge shape is described, but the present invention is not limited to this, and only the tapered shape may be formed in the fitting portion 22, Only the wedge shape may be formed in the fitting portion 22. That is, the fitting portion 22 may have at least a tapered shape or a wedge shape.
- the main body part 16 of the joint 10 demonstrated the form which covers 12 A of outer peripheral surfaces of the pile body 12, this invention is not limited to this,
- the main body part 16 of the joint 10 is the inside of the pile body 12. It may be formed along the peripheral surface.
- the key 14 is provided on the inner peripheral surface of the pile body 12.
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Abstract
Description
図1は、本実施形態の杭体連結構造を構成するジョイント10及び杭体12,12の外観図である。図1(a)はジョイント10の横断面図、図1(b)はジョイント10の側面図、図1(c)は杭体12の横断面図、図1(d)は杭体12の側面図である。
図13は、本実施形態の杭体12及びジョイント10の外観図である。なお、図13における図1~12と同一の構成部分については図1~12等と同一の符号を付して、その説明を省略する。
本実施形態は、ジョイント10で連結させる2本の杭体12の一方を地中に埋設する杭体12とし、他方の杭体12を一方の杭体12を埋設するために補助的に用いられる杭体(以下「簡易打ち下げ装置」という。)60(図14参照)とする。この簡易打ち下げ装置60は、地中に埋設する杭体12の上方に配置されるものの、簡易打ち下げ装置60自身は地中に埋設されない。
本実施形態の圧入機30は、図16に示されるように、杭体12を把持するチャック32として、メインチャック32Aとサブチャック32Bとを備える。なお、図16は、本実施形態の圧入機30を用いて杭体12を埋設する場合の工程を示す図である。また、本実施形態では上杭12dにジョイント10が予め接合され、ジョイント10に嵌合されるキー14が下杭12cに接合されている。
12 杭体
14 キー(突部)
16 本体部
22 嵌合部
40 補強部材
50A 逆転ストッパ(外れ防止部材)
50B 逆転ストッパ(外れ防止部材)
50C 逆転ストッパ(外れ防止部材)
Claims (12)
- 2本の杭体を連結する杭体継手であって、
突部が周面に設けられた前記杭体が端部から嵌め込まれる管状の本体部と、
前記杭体を嵌め込んで回転させることで前記突部に嵌合するように、前記本体部に形成される嵌合部と、
を備え、
前記嵌合部は、前記杭体の回転方向で前記本体部の前記端部から離れるように傾斜する面を有する第1形状、又は、前記突部と前記杭体との間に嵌入する第2形状が形成される杭体継手。 - 前記嵌合部は、前記第1形状を形成する前記面に前記第2形状が形成される請求項1記載の杭体継手。
- 前記突部は、平面状であり、平面内側が中抜きされている請求項1又は請求項2記載の杭体継手。
- 前記杭体には、周方向に非等角度間隔で配置された複数の前記突部が設けられ、
前記本体部には、複数の前記突部に対応する複数の前記嵌合部が形成される請求項1から請求項3の何れか1項記載の杭体継手。 - 前記本体部は、少なくとも前記嵌合部を覆う補強部材が設けられる請求項1から請求項4の何れか1項記載の杭体継手。
- 前記補強部材に固定され、前記突部が前記嵌合部から外れることを防止する外れ防止部材を備える請求項5記載の杭体継手。
- 前記補強部材は、前記嵌合部への前記突部の挿入を確認するための孔が形成される請求項5又は請求項6記載の杭体継手。
- 前記嵌合部は、前記杭体の軸線方向に複数の前記第1形状、又は、複数の前記第2形状が形成される請求項1から請求項7の何れか1項記載の杭体継手。
- 前記2本の杭体のうち一方の前記杭体は、地中に埋設される前記杭体であり、
他方の前記杭体は、前記一方の杭体を埋設するために補助的に用いられる杭体であり、前記一方の杭体の上方に配置される、請求項1から請求項8の何れか1項記載の杭体継手。 - 突部が周面に設けられた杭体と、
前記杭体が端部から嵌め込まれる管状の本体部を有し、前記杭体を嵌め込んで回転させることで前記突部に嵌合する嵌合部に、前記杭体の回転方向で前記本体部の前記端部から離れるように傾斜する面を有する第1形状、又は前記突部と前記杭体との間に嵌入する第2形状が形成される杭体継手と、
を備える杭体連結構造。 - 突部が周面に設けられた杭体が端部から嵌め込まれる管状の本体部を有し、前記杭体を嵌め込んで回転させることで前記突部に嵌合する嵌合部に、前記杭体の回転方向で前記本体部の前記端部から離れるように傾斜する面を有する第1形状、又は前記突部と前記杭体との間に嵌入する第2形状が形成される杭体継手によって2本の前記杭体を連結する杭体連結方法であって、
前記杭体を埋設する第1工程と、
前記埋設された前記杭体に対して他の前記杭体を立て、2本の前記杭体が前記杭体継手によって嵌合するように他の前記杭体を回転させる第2工程と、
を有する杭体連結方法。 - 突部が周面に設けられた杭体が端部から嵌め込まれる管状の本体部を有し、前記杭体を嵌め込んで回転させることで前記突部に嵌合する嵌合部に、前記杭体の回転方向で前記本体部の前記端部から離れるように傾斜する面を有する第1形状、又は前記突部と前記杭体との間に嵌入する第2形状が形成される杭体継手によって、第1杭体と第2杭体とを連結する杭体連結方法であって、
前記第2杭体を圧入機が備える第2把持手段によって把持する第1工程と、
前記第1杭体を前記圧入機が備える第1把持手段によって把持する第2工程と、
前記第1杭体と前記第2杭体との端部が当接するように前記第1把持手段を移動させ、前記第1把持手段又は前記第2把持手段を回転させることで、前記第1杭体と前記第2杭体とを前記杭体継手で連結する第3工程と、
を有する杭体連結方法。
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SG11202108809QA SG11202108809QA (en) | 2019-02-12 | 2020-02-12 | Pile joint, pile coupling structure, and pile coupling method |
CN202080013124.7A CN113490778A (zh) | 2019-02-12 | 2020-02-12 | 桩身接头、桩身连结结构及桩身连结方法 |
AU2020220777A AU2020220777B2 (en) | 2019-02-12 | 2020-02-12 | Pile joint, pile link structure, and pile link method |
US17/429,772 US11519149B2 (en) | 2019-02-12 | 2020-02-12 | Pile joint, pile coupling structure, and pile coupling method |
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JP2016044476A (ja) * | 2014-08-25 | 2016-04-04 | 日鐵住金建材株式会社 | 打設用鋼管の継手構造及び打設用鋼管の接続方法 |
JP2017186795A (ja) * | 2016-04-06 | 2017-10-12 | 新日鐵住金株式会社 | 鋼管杭の継手構造及び連結鋼管杭 |
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US11519149B2 (en) | 2022-12-06 |
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