JP6672347B2 - Pile head joint structure - Google Patents

Description

The present invention relates to a pile head constructed at a portion where a pile head of a pile material driven into the ground and a reinforced concrete foundation portion constructed thereabove are joined in a foundation work of a relatively large reinforced concrete structure. contact Go構 concrete on.

  Conventionally, various technologies have been developed and constructed with regard to the pile head joint member and the pile head joint structure. As the related to the present invention, for example, a “pile head structure” described in Patent Document 1 or Patent Literature 2 includes “Pile head joint structure of winged steel pipe pile and method of constructing the same”.

  The “pile head structure” described in Patent Literature 1 includes a base plate portion formed by a plurality of plate-shaped members so as to surround an outer peripheral surface of a steel pipe pile in a circumferential direction, and a plate-shaped member attached to the outer peripheral surface of the steel pipe pile. It comprises a backing metal on which the member is placed, and a welded portion for joining the inner peripheral edge of the plate-shaped member and the outer peripheral surface of the steel pipe pile.

  The “pile head joint structure of a winged steel pipe pile” described in Patent Literature 2 is a method in which two or more arc-shaped steel plate pile supporting members are attached to each pile head support on the outer periphery of the wing steel pipe pile. A gap is provided between the pressure metal fitting and the adjacent pile head pressure metal fitting, and the ring is arranged in a ring shape and mounted so as to protrude in a flange shape in a direction orthogonal to the pile axis, and the pile head is embedded in concrete. .

JP-A-2006-3507 JP 2013-241731 A

  In the “pile head structure” described in Patent Literature 1, a plurality of arc plates are placed on a backing metal attached to an outer peripheral surface of a steel pipe pile, and an inner peripheral edge of the arc plate and an outer peripheral surface of the steel pipe pile. Are welded to form a base plate portion surrounding the outer peripheral surface of the steel pipe pile in the circumferential direction.

  For this reason, at the construction site, it is necessary to fix the arc plate placed on the backing metal with a jig so that it does not move during welding work, or to support other people with the arc plate. In addition, the welding operation is complicated, and the welding operation time is often increased.

  Similarly, in the “pile head joint structure of a winged steel pipe pile” described in Patent Document 2, a plurality of pile head bearings made of an arc-shaped steel plate are welded to form a flange on the pile head of the winged steel pipe pile. At the construction site, it is necessary to fix the pile head bearing bracket with a jig so that it does not move during welding work, and it is necessary for other workers to support the pile head bearing bracket. There is a high possibility that the welding operation becomes complicated and the welding operation time increases.

An object of the present invention is to provide, to facilitate the welding work in the installation site, it is possible to shorten the welding time is to provide a pile head contact Go構 Concrete exhibit excellent strength.

Pile head joint member used in the pile head joint structure according to the present invention,
A pile head joint member to be attached to a pile head of a pile material driven into the ground,
A disk-shaped body member having an engagement hole through which a pile head protruding from the ground can penetrate,
A bridge member provided on one surface of the main body member so as to straddle the engagement hole in a radial direction,
A plurality of reinforcing members erected on one surface of the main body member so as to surround the engagement hole,
The rebar material is fixed to the main body member via a screw mechanism.

  In the pile head joint member, it is preferable that upper ends of the reinforcing bars adjacent in the circumferential direction of the engagement hole are continuous.

  In the pile head joint member, a plurality of the bridge members may be provided.

  The pile head joining member may include a rib standing upright along a peripheral wall of the main body member.

In the above-pile head joint member, the reinforcing bar is that secure to the body member via a screw mechanism.

Next, the pile head joint structure according to the present invention,
A pile joint structure formed by fixing the pile head joint member to pile head of pile material implanted into the ground,
The pile head joining member,
A disk-shaped body member having an engagement hole through which a pile head protruding from the ground can penetrate,
A bridge member provided on one surface of the main body member so as to straddle the engagement hole in a radial direction,
A plurality of reinforcing bars that are erected on one surface of the main body member so as to surround the engagement hole and are fixed to the main body member via a screw mechanism,
The pile head joining member attached to the pile head in a state where a pile head protruding from the ground is inserted into an engagement hole of the main body member and the bridge member is in contact with an upper edge of the pile head. When,
A welded portion provided between an outer periphery of the pile head and an inner periphery of the engagement hole.

The present invention, to facilitate the welding work in the installation site, it is possible to shorten the welding time, it is possible to provide a pile head contact Go構 Concrete exhibit excellent strength.

It is a partially omitted front view showing a pile head joint member used in a pile head joint structure which is an embodiment of the present invention. FIG. 2 is a partially omitted plan view of the pile head joining member shown in FIG. 1. It is a partially-omitted bottom view of the pile head joint member shown in FIG. FIG. 2 is a partially omitted perspective view showing a state in which a main body member constituting the pile head joining member shown in FIG. 1 is joined to a pile head. FIG. 2 is a partially omitted front view showing a pile head joining structure using the pile head joining member shown in FIG. 1. It is a partially omitted front view which shows the pile head joining member which is other embodiment. It is a partially omitted front view which shows the pile head joining member which is other embodiment. FIG. 8 is a partially omitted plan view of the pile head joint member shown in FIG. 7. FIG. 8 is a partially omitted bottom view of the pile head joining member shown in FIG. 7. FIG. 8 is a partially omitted perspective view showing a state in which a main body member constituting the pile head joining member shown in FIG. 7 is joined to a pile head. FIG. 8 is a partially omitted front view showing a pile head joining structure using the pile head joining member shown in FIG. 7. It is a partially omitted front view which shows the pile head joining member which is other embodiment. It is a partially omitted front view which shows the pile head joining member which is other embodiment. It is a partially omitted front view which shows the pile head joining member which is other embodiment. It is a partially omitted front view which shows the pile head joining member which is other embodiment.

Hereinafter, based on FIG. 1 to FIG. 12, a pile head joint member 10, 20, 30, 40 and a pile head using the pile head joint member 10, 30 which can be used in the pile head joint structure according to the embodiment of the present invention. The joining structures 50 and 60 will be described.

  First, a pile head joint member 10 and a pile head joint structure 50 using the pile head joint member 10 will be described with reference to FIGS. 1 to 5.

  The pile head joining member 10 shown in FIGS. 1 to 3 is a member to be mounted on the pile head P1 of the pile material P driven into the ground G, as shown in FIG. The pile head joint member 10 is connected to a main body member 11 having an engaging hole 12 through which a pile head P1 protruding from the surface of the discarded concrete S cast on the ground G1 can penetrate, and an upper surface 11a of the main body member 11. A plurality of bridge members 13 provided so as to straddle the joint hole 12 in the radial direction, and a plurality of reinforcing bars 14 erected on the upper surface 11 a of the main body member 11 so as to surround the engagement hole 12. I have.

  The main body member 11 is a disk-shaped member having a circular engagement hole 12 at the center. As shown in FIG. 4, the main body member 11 has a plurality of through holes 15 opened at equal intervals around the center 12 a of the engagement hole 12 so as to surround the engagement hole 12.

  The reinforcing member 14 has an inverted U-shape, and stands upright on the upper surface 11a of the main body member 11 via a screw mechanism. Specifically, bolt portions 14b formed at both ends of the reinforcing bar material 14 are inserted into the through holes 15, and screwed to the bolt portions 14b so as to sandwich the main body member 11 from the upper surface 11a and the lower surface 11b of the main body member 11. By tightening the nut N, the reinforcing bar 14 is fixed to the upper surface 11a side of the main body member 11 in an upright manner. Since the upper end 14a of the reinforcing member 14 is curved in a semicircular shape, the upper ends of the reinforcing members 14 adjacent to each other in the circumferential direction of the engagement hole 12 are in a continuous state.

  The plurality of bridge members 13 are members provided with trapezoidal cutouts 13a on the lower edge 13b side of the band plate material, and have a cross shape orthogonal to the center 12a of the engagement hole 12 in a plan view. Are located. The lower edge 13b of the bridge member 13 located directly above the engagement hole 12 is located above the upper surface 11a of the main body member 11, and has the length of the lower edge 13b (the length of the engagement hole 12 in the inner diameter direction). Is larger than the inner diameter of the engagement hole 12.

  Next, a method of using the pile head joint member 10 and a pile head joint structure 50 using the pile head joint member 10 will be described with reference to FIGS.

  When the pile head joint member 10 is mounted on the pile head P1 of the pile material P, as shown in FIG. 4, the main body member 11 from which the reinforcing bar material 14 has been removed is attached so as to cover the pile head P1. More specifically, when the pile head P1 is inserted into the engagement hole 12 (see FIG. 2) of the main body member 11 and the lower edge 13b of the bridge member 13 is brought into contact with the upper edge of the pile head P1, the main body member 11 Is mounted on the pile head P1.

  Next, when the outer periphery of the pile head P1 and the inner periphery of the engagement hole 12 of the main body member 11 are welded, the main body member 11 is fixed to the pile head P1 by a welded portion W. As shown in FIG. 5, when the lower edge 13b of the bridge member 13 of the main body member 11 is brought into contact with the upper end edge of the pile head P1, the lower surface 11b of the main body member 11 on the outer periphery of the pile head P1. Since the backing metal 16 is fixed at the contact position, the outer periphery of the pile head P1 and the inner periphery of the engagement hole 12 of the main body member 11 can be reliably welded.

  Thereafter, the bolt portions 14b of the reinforcing bar 14 shown in FIG. 1 are inserted through the plurality of through holes 15 of the main body member 11 in the state shown in FIG. 4 and the nut N is tightened, so that the reinforcing bar 14 is fixed in an upright state. Thus, the pile head joint structure 50 shown in FIG. 5 is formed.

  As described above, when the pile head joining member 10 is mounted on the pile head P1 of the pile material P, as shown in FIG. 5, the main body member 11 from which the reinforcing material 14 has been removed is put on the pile head P1. When attached in this manner, the lower edge 13b of the bridge member 13 abuts on the upper edge of the pile head P1, and the main body member 11 is stably held on the pile head P1. Therefore, welding work between the outer periphery of the pile head P1 and the inner periphery of the engagement hole 12 of the main body member 11 can be performed by one worker, and the welding operation is facilitated and the welding operation time is shortened. Can be.

  Further, the pile head joining member 10 is joined to the pile head P by a welded portion W, and the plurality of reinforcing bars 14 are fixed to the main body member 11 via a screw mechanism (a screw mechanism including a bolt portion 14b and a nut N). Since the upper end portions 14a of the reinforcing bars 14 adjacent to each other in the circumferential direction of the engagement hole 12 are continuous, excellent strength is exhibited.

  Next, a pile head joint member 20 according to another embodiment will be described with reference to FIG. In the pile head joint member 20 shown in FIG. 6, the upper end portions 14c of the plurality of reinforcing bars 14 are linear. Since the upper end portion 14c of the reinforcing member 14 is linear, it is possible to avoid interference (such as mutual contact and excessive approach) with other reinforcing members arranged above the upper end portion 14c at the construction site. Therefore, the restriction on the arrangement of the bars can be eased. The other parts have the same shape and structure as the pile head joint member 10 shown in FIG. 1, and thus the same reference numerals as those in FIG.

  Next, a pile head joint member 30 and a pile head joint structure 60 using the pile head joint member 30 according to another embodiment will be described with reference to FIGS. In addition, in the part which comprises the pile head connection member 30 and the pile head connection structure 60, about the part common with the above-mentioned pile head connection member 10 and the pile head connection structure 50, the code | symbol same as the code in FIG. The description is omitted here.

  As shown in FIG. 7 to FIG. 9, the pile head joining member 30 includes a rib 31 which is provided upright in a circular peripheral wall shape along the outer periphery of the disk-shaped main body member 11.

  When the pile head joining member 30 is mounted on the pile head P1 of the pile material P, as shown in FIG. 10, the main body member 11 from which the reinforcing bar material 14 has been removed is attached so as to cover the pile head P1. Specifically, when the pile head P1 is inserted through the engaging hole 12 (see FIG. 8) of the main body member 11 and the lower edge 13b of the bridge member 13 is brought into contact with the upper edge of the pile head P1, the main body member 11 Is mounted on the pile head P1. Next, when the outer periphery of the pile head P1 and the inner periphery of the engagement hole 12 of the main body member 11 are welded, the main body member 11 is fixed to the pile head P1 by a welded portion W.

  Thereafter, the bolt portion 14b of the reinforcing bar 14 shown in FIG. 7 is inserted through the plurality of through holes 15 of the main body member 11 in the state shown in FIG. 10 and the nut N is tightened, so that the reinforcing bar 14 is fixed in an upright state. Thus, the pile head joint structure 60 shown in FIG. 11 is formed.

  In the pile head joining member 30, the rigidity of the main body member 11 is increased by providing the circular peripheral wall-shaped ribs 31 along the outer periphery of the main body member 11, so that the proof stress is greatly improved.

  Next, a pile head joint member 40 according to another embodiment will be described with reference to FIG. In the pile head joint member 40 shown in FIG. 12, the upper end portions 14c of the plurality of reinforcing bars 14 are linear. As described above, since the upper end portion 14c of the reinforcing member 14 is linear, interference with other reinforcing members arranged above the upper end portion 14c at the construction site (such as mutual contact or excessive approach) is prevented. Since it can be avoided, restrictions on the arrangement of bars can be relaxed. The other parts have the same shape and structure as the pile head joint member 30 shown in FIG. 7, and therefore, the same reference numerals as those in FIG.

Pile head joining members 70, 80, and 90 that are other embodiments usable in the pile head joining structure according to the present invention will be described with reference to FIGS. In addition, in the part which comprises the pile head joining member 70,80,90, the part common to the pile head joining member 10 mentioned above is attached with the same code as the code | symbol in FIG. .

  In the pile head joint member 70 shown in FIG. 13, a plurality of reinforcing bars 24 are provided upright on the upper surface 11 a of the main body member 11 so as to surround the engagement holes 12. The reinforcing bar 24 has a linear shape, and a bolt portion 24b formed at a lower end portion thereof is screwed into a plurality of female screw holes 11c formed at equal intervals around the engaging hole 12 of the main body member 11. It is fixed to the upper surface 11a side of the main body member 11 in an upright manner. In the pile head joint member 70, since the nut N in the pile head joint member 10 shown in FIG. 1 is unnecessary, the number of parts can be reduced.

  In the pile head joint member 80 shown in FIG. 14, similarly to the above-described pile head joint member 70, a plurality of reinforcing bars 24 are erected on the upper surface 11 a of the main body member 11 so as to surround the engagement holes 12. The reinforcing bar 24 has a linear shape, and a bolt portion 24b formed at the lower end thereof is screwed into a plurality of female screw holes 11d formed at equal intervals around the engaging hole 12 of the main body member 11. It is fixed to the upper surface 11a side of the main body member 11 in an upright manner. The female screw hole 11d is formed by subjecting the main body member 11 to burring tapping.

  In the pile head joint member 80, the circumferential wall-shaped rising portion 11e formed at the time of burring is used as the upper surface 11a of the main body member 11, and the projecting direction of the rising portion 11e and the rising direction of the reinforcing steel material 24 are the same. Have been placed. Since the axial length of the female screw hole 11d formed by the burring tapping process is larger than the thickness of the main body member 11, it is necessary to secure a relatively long screwing length between the reinforcing member 24 and the bolt portion 24b. Accordingly, the screwing strength of the reinforcing member 24 to the main body member 11 can be increased.

  In the pile head joint member 80 shown in FIG. 14, the lower end of the bolt portion 24b of the reinforcing bar 24 protrudes from the lower surface of the main body member 11. In such a case, the nut N is screwed into the lower end of the bolt portion 24b. You can also wear it. Further, a reinforcing plate 17 having a circular plate shape, a square plate shape, or a polygonal plate shape may be fixed to the upper end portion of the reinforcing bar 24 in a state where the plane direction of the reinforcing plate 17 crosses the reinforcing bar 24. Further, the upper end portion of the reinforcing bar 24 can be bent into an inverted L-shape or an inverted J-shape.

  As described above, in the pile head joint member 80 shown in FIG. 14, the reinforcing bar 24 is linear, but is not limited to this, so that the reinforcing bar 24 has a wavy shape, a zigzag shape, a crank shape, or a spiral shape. Materials can also be used.

  In the pile head joint member 90 shown in FIG. 15, the circumferential wall-shaped rising portion 11e formed at the time of burring is used as the lower surface 11b of the main body member 11, and the projecting direction of the rising portion 11e and the rising direction of the reinforcing bar 24 are 180 degrees. They are arranged in the opposite direction. Other parts of the pile head joint member 90 are the same as the pile head joint member 80 shown in FIG.

  In the pile head joint members 70, 80, and 90 shown in FIGS. 13 to 15, a screw mechanism (the bolt portion 24 b of the reinforcing bar 24 and the female screw hole 11 c (or 11 d)) is a fixing unit of the reinforcing bar 24 to the main body member 11. ) Can also be employed in the body member 11 with the ribs 31 shown in FIG.

The pile head joining members 10, 20, 30, 40, 70, 80, 90 and the pile head joining structures 50, 60 described with reference to FIGS. 1 to 12 can be used in the pile head joining structure according to the present invention. a pile are illustrative of pile joint structure using the bonding member and the pile head joint members, pile head joint structure Ru engaged to the invention pile joint structure using pile head joint member 10, 30 described above It is not limited to 50 and 60.

Pile head contact Go構 concrete according to the present invention, it can be office buildings, widely used in industrial fields such as civil engineering and construction industry as construction technology of foundation work of reinforced concrete structures, such as large-scale commercial facilities or public buildings.

10, 20, 30, 40, 70, 80, 90 Pile head joint member 11 Main body member 11a Upper surface 11b Lower surface 11c, 11d Female screw hole 11e Rising portion 12 Engagement hole 12a Center 13 Bridge member 13a Notch portion 13b Lower edge portion 14, 24 Reinforcing material 14a, 14c Upper end 14b Bolt part 15 Through hole 16 Backing plate 17 Reinforcement plate 31 Rib 50, 60 Pile head joint structure G Ground G1 Ground N Nut P Pile material P1 Pile head S Discard concrete W Welding Department

Claims (4)

A pile joint structure formed by fixing the pile head joint member to pile head of pile material implanted into the ground,
The pile head joining member,
A disk-shaped body member having an engagement hole through which a pile head protruding from the ground can penetrate,
A bridge member provided on one surface of the main body member so as to straddle the engagement hole in a radial direction,
Are those having a, a plurality of reinforcing bar fixed to the body member via the erected screw mechanism in a state surrounding the engaging hole on one surface of said body member,
The pile head joining member attached to the pile head in a state where a pile head protruding from the ground is inserted into an engagement hole of the main body member and the bridge member is in contact with an upper edge of the pile head. When,
A pile head joint structure comprising: a welded portion provided between an outer periphery of the pile head and an inner periphery of the engagement hole. The pile head joint structure according to claim 1, wherein upper ends of the reinforcing bars adjacent to each other in the circumferential direction of the engagement hole are continuous. The pile head joint structure according to claim 1, wherein a plurality of the bridge members are provided. The pile head joint structure according to any one of claims 1 to 3, further comprising a rib erected in a peripheral wall shape along the outer periphery of the main body member.

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