JP2018096194A - Pile head processing construction method and pile head processing structure, and steel cylindrical member with anchor member used for the structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pile head processing construction method and a pile head processing structure which are extremely excellent in workability and economical efficiency while achieving omission of a welding work, and to provide a steel cylindrical member with an anchor member.SOLUTION: A pile heat processing construction method includes providing a steel cylindrical member having an anchor member 1 such as an anchor reinforcement 1 joined to a base structure 11 provided on its outer peripheral portion, on a pile head portion of a foundation pile 10 having a steel pipe 10a on the outer periphery of the pile head portion. The steel cylindrical member 2 with the anchor member is formed of a plurality of circular arc-shaped members 2a having an inner diameter approximately as large as a pile diameter of the pile head portion of the foundation pile 10 and having a shape approximately equal to a shape divided in the circumferential direction, and the adjacent circular arc-shaped members 2 and 2 are connected to each other while bonding the plurality of circular arc-shaped members 2a to each other by an adhesive 3 along a steel pipe outer periphery 10a of the pile head portion of the foundation pile 10 driven into a ground 12 to be formed into a cylindrical shape or after formed into the cylindrical shape, and thereby the steel circular arc-shaped member 2 is bonded and fixed to the outer periphery of the steel pipe 10a of the pile head portion of the foundation pile 10.SELECTED DRAWING: Figure 1

Description

  The present invention belongs to a technical field of a pile head processing method in which an anchor member (anchor rebar, anchor steel bar) for joining a foundation structure is provided on a pile head of a foundation pile. Pile head processing method in which a steel cylindrical member with an anchor member on the outer periphery is attached to the pile head of a foundation pile (mainly a concrete pile covered with a steel pipe) that has a steel pipe on the outer periphery. Further, the present invention relates to a pile head processing structure constructed by the construction method, and a steel cylindrical member with an anchor member used in the structure.

Conventionally, as a pile head treatment method for joining the pile head of the foundation pile and the foundation structure, multiple anchor members (anchor rebar, anchor steel bar) are welded to the outer peripheral surface of the pile head of the foundation pile. A technique for joining the anchor member to the substructure in a form in which the anchor member is arranged in the substructure is well known.
However, the above-mentioned pile head processing method is very troublesome because it is necessary to perform the work of welding the anchor members one by one on the site, and there has been a problem in construction such as an increase in the construction period. In addition, the work of welding the anchor member in the vertical direction to the pile head exposed about tens of centimeters (mainly 20-30 cm) from the ground is difficult to weld with high accuracy because it is forced to be tight in a low posture. However, there is also a problem that requires advanced welding techniques such as skilled workers.
Therefore, in recent years, as shown in Patent Documents 1 and 2, a steel ring (steel cylindrical member) to which an anchor member has been welded in advance is manufactured in a factory or the like, and the steel ring with the anchor member is used on site. Various inventions have been disclosed and implemented in which welding work is omitted by joining to a pile head such as a foundation pile, and in turn, labor saving in field work is achieved.

JP 2009-91899 A Japanese Utility Model Publication No. 62-110344

Since the steel ring which concerns on patent document 1 is implemented by an integral ring structure, it is necessary to carry out external fitting toward the downward direction from the upper part of the pile head of a foundation pile, and to provide concentric arrangement with the pile head. In some cases, precise alignment work was required.
Further, since the pile head and the steel ring are fixed by means of filling mortar or cement paste between them, it is necessary to prepare a liquid leakage preventing member (formwork) separately. In addition, it is necessary to carefully attach the liquid leakage preventing member while maintaining the concentric arrangement.
Furthermore, since the leakage preventing member cannot be removed during a predetermined period until the mortar or cement paste is solidified (cured), there is a problem that the work is stagnant.
As described above, although the invention according to Patent Document 1 can omit the welding work in the field work, a new problem has occurred in terms of workability and economy.

Since the steel ring according to Patent Document 2 is implemented with an integral ring structure similar to that of Patent Document 1, the steel ring pile is also externally fitted from the top to the bottom of the pile head, and the pile head A precise alignment work is required, such as the need to provide a concentric arrangement with the part. In addition, the steel ring has a configuration that fits almost exactly on the pile head without any gaps, and so precision has been required for member production.
In addition, it is necessary to drill a plurality of bolt through holes in advance in the pile heads of the steel pipe piles at locations where the core holes and cores of the steel ring coincide with each other. Further, the problem of cross-sectional defects caused by drilling a plurality of bolt holes cannot be ignored.
As described above, the invention according to Patent Document 2, like the Patent Document 1, can eliminate the welding work in the field work, but has a new problem in terms of workability and economy.

  The present invention has been devised in view of the problems of the background art described above, and the object of the present invention is to realize the omission of welding work which is an advantage of the inventions according to Patent Documents 1 and 2. The pile head processing method and the pile head processing structure, and the steel cylindrical member with an anchor member used in the same structure, which are excellent in workability and economy, have improved various problems related to Patent Documents 1 and 2 described above. It is to provide.

As a means for solving the problems of the background art, a pile head processing method according to the invention described in claim 1 is a method of joining a foundation structure to a pile head of a foundation pile having a steel pipe on an outer periphery of the pile head. It is a pile head processing method for providing a steel cylindrical member provided with an anchor member such as an anchor rebar on the outer periphery,
The steel cylindrical member with an anchor member has an inner diameter substantially equal to a pile diameter of a pile head of the foundation pile, and includes a plurality of arc-shaped members having a shape substantially equal to a shape divided in a circumferential direction. , While adhering the plurality of arc-shaped members with an adhesive along the outer circumference of the steel pipe of the pile head of the foundation pile driven into the ground, or forming a cylindrical shape, the adjacent arc shape By connecting the members, the steel cylindrical member with an anchor member is bonded and fixed to the outer periphery of the steel pipe of the pile head of the foundation pile.

In the pile head processing method according to the invention described in claim 2, an anchor member such as an anchor rebar for joining to the foundation structure is provided on the outer periphery of the pile head of the foundation pile having a steel pipe on the outer periphery of the pile head. A pile head processing method for providing a steel cylindrical member provided,
The steel cylindrical member with an anchor member has an inner diameter substantially equal to a pile diameter of a pile head of the foundation pile, and includes a plurality of arc-shaped members having a shape substantially equal to a shape divided in a circumferential direction. The plurality of arc-shaped members bonded to each other with an adhesive in a configuration in which the arc-shaped members are not connected to each other along the outer periphery of the steel pipe of the pile head of the foundation pile driven into the ground, and then formed into the cylinder shape. The steel cylindrical member with the anchor member is bonded and fixed to the outer periphery of the steel pipe of the pile head of the foundation pile by tightening the arc-shaped member with a belt member that can be wound from the outside. .

In the pile head processing method according to the invention described in claim 3, an anchor member such as an anchor rebar for joining a foundation structure is provided on the outer periphery of the pile head of the foundation pile having a steel pipe on the outer periphery of the pile head. A pile head processing method for providing a steel cylindrical member provided,
The steel cylindrical member with an anchor member has an inner diameter substantially equal to a pile diameter of a pile head of the foundation pile, and includes a plurality of arc-shaped members having a shape substantially equal to a shape divided in a circumferential direction. Adhering the plurality of arc-shaped members with an adhesive along the outer circumference of the steel pipe of the pile head of the foundation pile driven into the ground, or forming a cylindrical shape, or forming an adjacent arc shape After connecting the members together, a plurality of arc-shaped members formed in the cylindrical shape can be tightened with a belt member that can be wound from the outside, or the plurality of arc-shaped members formed in the cylindrical shape can be wound from the outside. The steel cylindrical member with the anchor member is bonded and fixed to the outer periphery of the steel pipe of the pile head of the foundation pile by connecting adjacent arc-shaped members after tightening with a simple belt member. .

  According to a fourth aspect of the present invention, in the pile head processing method according to the first or third aspect, the plurality of arc-shaped members have flange joint portions at both ends in the circumferential direction of each arc-shaped member. The joint portion is connected by bolt joining to form the steel cylindrical member with the anchor member.

  The invention described in claim 5 is the pile head processing method according to claim 1 or 3, wherein the plurality of arc-shaped members are a series of configurations in which adjacent arc-shaped members are pin-connected by hinge joints, A flange joint portion formed at both end portions of a plurality of arc-shaped members having a series of structures is connected by bolt joining to form the steel cylindrical member with an anchor member.

  The invention described in claim 6 is the pile head processing method according to claim 2 or 3, wherein the belt member has a steel cylindrical member with an anchor member fixed to a steel pipe outer periphery of a pile head of the foundation pile. It is characterized by being removed after judging that it has been done.

In the pile head processing structure according to the invention described in claim 7, an anchor member such as an anchor rebar for joining a foundation structure is attached to the pile head of a foundation pile provided with a steel pipe on the outer periphery of the pile head. It is a pile head processing structure provided with a steel cylindrical member provided for,
The steel cylindrical member with an anchor member has an inner diameter substantially equal to a pile diameter of a pile head of the foundation pile, and includes a plurality of arc-shaped members having a shape substantially equal to a shape divided in a circumferential direction. The steel pipe outer periphery of the pile head of the foundation pile driven into the ground and a plurality of arc-shaped members connected in a cylindrical shape are fixed with an adhesive.

In the pile head processing structure according to the invention described in claim 8, an anchor member such as an anchor rebar for joining a foundation structure is attached to the pile head of a foundation pile provided with a steel pipe on the outer periphery of the pile head. It is a pile head processing structure provided with a steel cylindrical member provided for,
The steel cylindrical member with an anchor member has an inner diameter substantially equal to a pile diameter of a pile head of the foundation pile, and includes a plurality of arc-shaped members having a shape substantially equal to a shape divided in a circumferential direction. A plurality of arc-shaped members formed in a cylindrical shape in a configuration not connected to the steel pipe outer periphery of the pile head of the foundation pile driven into the ground are fixed with an adhesive, and further formed in the cylindrical shape. A plurality of arc-shaped members are sandwiched between belt members.

In the pile head processing structure according to the invention described in claim 9, an anchor member such as an anchor rebar for joining a foundation structure is attached to the pile head of a foundation pile having a steel pipe on the outer periphery of the pile head. It is a pile head processing structure provided with a steel cylindrical member provided for,
The steel cylindrical member with an anchor member has an inner diameter substantially equal to a pile diameter of a pile head of the foundation pile, and includes a plurality of arc-shaped members having a shape substantially equal to a shape divided in a circumferential direction. The steel pipe outer periphery of the pile head of the foundation pile driven into the ground and a plurality of arc-shaped members connected in a cylindrical shape are fixed with an adhesive, and further a plurality of arc-shaped members connected in the cylindrical shape Is sandwiched between belt members.

  The invention described in claim 10 is the pile head treatment structure described in any one of claims 7 to 9, wherein the foundation pile is a steel pipe-covered concrete pile.

  The invention described in claim 11 is the pile head processing structure according to any one of claims 7 to 10, wherein the foundation is provided at an upper end portion of the arc-shaped member constituting the steel cylindrical member with the anchor member. The hanging part which mounts on the upper surface of the pile head of a pile is protrudingly provided, It is characterized by the above-mentioned.

  The invention described in claim 12 is the pile head processing structure according to any one of claims 7 to 11, wherein the anchor member of the steel cylindrical member with the anchor member is arranged on an outer peripheral surface of the arc-shaped member. It is characterized by being joined via flat steel.

  The steel cylindrical member with an anchor member according to the invention described in claim 13 is a steel cylindrical member with an anchor member used in the pile head processing structure according to any one of claims 7 to 12, wherein A plurality of arc-shaped members having an inner diameter substantially equal to the pile diameter of the pile head of the foundation pile and having a shape substantially equal to the shape divided in the circumferential direction, with joint portions formed on both side edges in the circumferential direction, It is the structure connected by cylindrical shape by this.

  According to the pile head processing method and the pile head processing structure and the steel cylindrical member with an anchor member used in the structure according to the present invention, the following effects can be obtained.

1) It can be constructed without welding work on site. Therefore, it is possible to save labor on site work.
2) The steel cylindrical member with an anchor member is positioned from the top of the pile head, not from the top of the pile, but by applying a plurality of arcuate members from the horizontal direction and connecting them with bolts and nuts. There is no need for alignment. Therefore, it is excellent in workability (workability).
3) Since an adhesive is used as a joining means between the pile head of the foundation pile and the steel cylindrical member with the anchor member, there is no risk of liquid leakage and no formwork is required. Moreover, since the bonding thickness can be made very thin, the strength and rigidity of the pile head of the foundation pile can be improved extremely rationally as compared with the case of bonding with mortar or cement paste.
4) In addition to the adhesive, the steel cylindrical member with an anchor member is fastened and fixed to a steel pipe of the pile head with a joining means using a bolt and / or a fastening means using a belt member. A cylindrical member made of steel can be reliably joined to the pile head of the foundation pile so that stress can be transmitted.
5) It can be carried out without any modification on the foundation pile side.
6) In summary, the present invention improves various problems according to Patent Documents 1 and 2 while realizing the omission of the welding work that is an advantage of the inventions according to Patent Documents 1 and 2, and improves workability. In addition, it is possible to realize a pile head processing method and a pile head processing structure that are extremely excellent in economic efficiency, and a steel cylindrical member with an anchor member used in the structure.

A is an elevation view showing an embodiment of a pile head processing method (claims 1 and 4) and a pile head processing structure (claim 7) according to the present invention, and B is a plan view of A. C is an exploded view of a steel cylindrical member with an anchor member of B, and D is an explanatory view of a connecting portion. A is an elevation view showing an embodiment of a pile head processing method (claims 1 and 5) and a pile head processing structure (claim 7) according to the present invention, and B is a plan view of A. C is an exploded view of a steel cylindrical member with an anchor member of B, and D is an explanatory view of a connecting portion. A is the schematic which showed the variation of the steel cylindrical member with an anchor member, and B is the top view which expanded and showed the principal part of A. FIG. A is a schematic view showing a virtual reinforced concrete cross section of the foundation pile according to FIGS. 1 and 2, B is a schematic view showing a virtual reinforced concrete cross section of the foundation pile according to FIG. 3, and C is the other It is the schematic which showed the virtual reinforced concrete cross section of the foundation pile which concerns on a variation. A is an elevational sectional view showing a variation of a foundation pile that is an application target of a pile head processing method and a pile head processing structure according to the present invention, and B is a sectional view taken along line BB of A, C is a plan view of A. FIG. A is an elevational sectional view showing a variation of a foundation pile that is an application target of a pile head processing method and a pile head processing structure according to the present invention, and B is a sectional view taken along line BB of A, C is a plan view of A. FIG.

  Next, an embodiment of a pile head processing method, a pile head processing structure and a steel cylindrical member with an anchor member used for the structure according to the present invention will be described with reference to the drawings.

In the pile head processing method according to the present invention, as shown in FIG. 1 and the like, the foundation structure 11 (see FIG. 3) is joined to the pile head of the foundation pile 10 having the steel pipe 10a on the outer periphery of the pile head. This is a method of providing a steel cylindrical member provided with an anchor member (an anchor rebar in the illustrated example) 1 on the outer periphery.
The steel cylindrical member 2 with an anchor member has an inner diameter substantially equal to the pile diameter of the pile head of the foundation pile 10 and is formed from a plurality of arc-shaped members 2a having a shape substantially equal to the shape divided in the circumferential direction. Become. Specifically, a plurality of (four in the illustrated example, four equally divided parts) arc-shaped members 2a having joint portions 2b and 2b formed on both side edges in the circumferential direction are bolted in the circumferential direction via the joint portions 2b. It is implemented in a connected configuration.
And while adhering the plurality of (four in the illustrated example) arcuate members 2a with the adhesive 3 along the outer periphery of the steel pipe 10a of the pile head of the foundation pile 10 driven into the ground 12, a cylindrical shape is formed. Or, after forming into a cylindrical shape, the adjacent (corresponding) joint portions 2b, 2b are connected to each other with bolts 5, so that the steel cylinder with the anchor member is attached to the outer periphery of the steel pipe 10a of the pile head of the foundation pile 10. This is a construction method in which the shaped member 2 is bonded and fixed.

The foundation pile 10 having the steel pipe 10a on the outer periphery of the pile head may be at least the foundation pile 10 having the steel pipe 10a on the outer periphery of the pile head (pile head exposed portion), and the steel pipe 10a is covered over the entire length of the pile. Naturally, this includes steel pipe-covered concrete piles such as SC piles, steel pipe piles, or piles in which steel pipes 10a are externally attached to cast-in-place concrete.
Incidentally, the foundation pile 10 which concerns on FIG. 1, FIG. 2 has shown the Example at the time of applying the said SC pile 10. FIG. Instead of the SC pile 10, the steel pipe-covered concrete pile 10 developed by the present applicant as shown in FIGS. The structure of the steel pipe covered concrete pile 10 according to FIGS. 5 and 6 will be described later.

  The reason why the inner diameter of the steel cylindrical member 2 with the anchor member is substantially equal to the pile diameter of the pile head of the foundation pile 10 is that the steel cylindrical member 2 has a thickness of about 0.5 mm or less. Considering that it can be satisfactorily bonded and fixed to the steel pipe 10a of the pile head via the adhesive 3, it can be sufficiently implemented even with an inner diameter slightly larger than the pile diameter of the pile head, and the steel cylindrical shape Taking into account the error-absorbing configuration in which the member 2 is divided into pieces (arc-shaped member 2a) with connecting fittings such as bolts 5 and nuts 6, the pile diameter is the same as the pile head pile diameter. This is due to the fact that a slightly smaller inner diameter can be sufficiently implemented.

  The steel cylindrical member 2 with an anchor member according to the present embodiment has an inner diameter substantially equal to a pile diameter (for example, 1000 mm) of a pile head of the foundation pile 10 (see paragraph [0026] above). Further, in this embodiment, four arcuate members 2a in which the joint portions 2b and 2b are formed at substantially four equal parts in the circumferential direction and the joint portions 2b and 2b are formed on the circumferential edges are provided in the circumferential direction via the joint portions 2b and 2b. It is implemented in a connected configuration. Specifically, four arcuate members 2a having the same shape and the same size having a substantially arc shape in cross section and a length in the cylinder axis direction covering the pile head exposed portion (about 25 cm as an example) It is implemented in a configuration that can be formed in a substantially cylindrical shape by connecting in the circumferential direction via the joint portions 2b and 2b. Furthermore, four anchor members 1 are welded to each arcuate member 2a in a balanced manner.

  In addition, although the said steel cylindrical member 2 with an anchor member which concerns on a present Example is formed using the circular-arc-shaped member 2a of the shape equivalent to dividing into 4 equal parts in the circumferential direction, it is not limited to this, The circumferential direction It can be similarly implemented by using the arc-shaped member 2a having the same shape as being divided into three equal parts or divided into two equal parts (half). Further, in the present embodiment, the arc-shaped member 2a having the same shape and size is used from the viewpoint of manufacturing cost, load handling property and handling property (workability), but the shape is not limited to the same shape and size. It may be in a form that can be formed into a substantially cylindrical shape when connected in the direction.

The anchor member 1 according to the present embodiment uses the anchor rebar 1 and welds and joins four arcuate members 2a with a good balance with respect to each arcuate member 2a. Since this joining operation is performed in advance at a factory or the like, it is possible to uniformly provide high-quality products.
Although the anchor reinforcing bar 1 according to the illustrated example is implemented in a simple bar shape, the contrivance to increase the fixing force to the foundation structure 11 by bending the upper end portion into an inverted U shape or attaching a stud is appropriately performed. It is where it is said. Instead of the anchor rebar 1, an anchor steel bar (including a deformed steel bar) may be used.
Further, in the present embodiment, a total of 16 anchor reinforcing bars (anchor members) 1 are provided four by four, but the number used is not limited to this, and can be appropriately increased or decreased according to the structural design. Of course, one arcuate member 2 a is implemented with a configuration including at least one anchor member 1.

  As the adhesive 3 according to the present embodiment, an acrylic resin or epoxy resin adhesive 3 is preferably used, which is applied to the inner peripheral surface of the arc-shaped member 2a and / or the outer peripheral surface of the steel pipe 10a of the pile head. The arc-shaped member 2a and the steel pipe 10a of the pile head are bonded. By using the adhesive 3, the thickness of the bonded part can be reduced to 0.5 mm or less. In terms of structural mechanics, the thinner the bonding part, the higher the strength and rigidity of the pile head of the foundation pile 10, so that the foundation is extremely rational compared to filling with mortar and cement paste. The strength and rigidity of the pile head of the pile 10 can be improved.

  Here, when it illustrates about the magnitude | size etc. of the said structural member, as for the said foundation pile (SC pile) 1, a pile diameter is about 300-1000 mm, length is about 5-15 m, and steel pipe thickness is about 4.5-19 mm. is there. The anchor member (anchor reinforcing bar) 1 has a diameter (φ) of about 25 to 35 mm, and the length is appropriately changed according to the structural design. The arc-shaped member 2a (steel cylindrical member) has a thickness (steel pipe thickness) of about 9 to 12 mm, and the length is appropriately changed in design according to the exposed dimension of the pile head.

As an example, the work procedure of the pile head processing method according to the present invention is to first place the foundation pile 10 on the ground 12 and expose the pile head of the foundation pile 10. The foundation pile 10 may be a ready-made pile or a cast-in-place pile as long as the foundation pile 10 has a steel pipe 10a on the outside.
Next, at the stage where the black skin of the steel pipe 10a surface of the pile head is removed by sandblasting as necessary, the adhesive 3 is applied to the inner peripheral surface of the arc-shaped member 2a, Position and bond to a predetermined outer peripheral surface of the steel pipe 10a of the pile head of the foundation pile 10. Next, in order along the circumferential direction, the arc-shaped member 2a having the adhesive 3 applied to the inner peripheral surface is positioned and bonded to a predetermined outer peripheral surface of the steel pipe 10a. Then, at the stage where a plurality of (four) arcuate members 2a form a substantially cylindrical shape (steel cylindrical member 2 with an anchor member), adjacent flange joint portions 2b and 2b are temporarily tightened with bolts 5 and nuts 6. To do.
Subsequently, the overall balance of the state of attachment of the steel cylindrical member 2 with an anchor member to the steel pipe 10a is confirmed (visually confirmed), and after fine adjustment as necessary, the bolt 5 and nut 6 are finally tightened.
In addition, the said work procedure is an example to the last, before apply | coating the adhesive agent 3 to the steel pipe 10a side of the said pile head, or forming the said substantially cylindrical shape, adjacent arc-shaped members 2a and 2a are bolted one by one. 5. You may temporarily tighten with nut 6.

  The pile head treatment structure constructed by the above pile head treatment method is an anchor such as an anchor rebar 1 for joining the foundation structure 11 to the pile head of the foundation pile 10 having the steel pipe 10a on the outer periphery of the pile head. It is a pile head processing structure in which a steel cylindrical member 2 provided with a member 1 on the outer periphery is provided, and the steel cylindrical member 2 with an anchor member is substantially equal to the pile diameter of the pile head of the foundation pile 10. The outer periphery of the steel pipe 10a of the pile head of the foundation pile 10 driven into the ground 12 is composed of a plurality of (four) arcuate members 2a having substantially the same shape as the shape divided in the circumferential direction. And a plurality of arc-shaped members 2 a connected in a cylindrical shape by the joint portion 2 b are fixed by an adhesive 3.

Therefore, according to the pile head processing method and the pile head processing structure and the steel cylindrical member 2 with an anchor member used for the structure according to the present invention, the following effects are produced.
1) It can be constructed without welding work on site. Therefore, it is possible to save labor on site work.
2) The steel cylindrical member 2 with an anchor member is not applied from above the pile head, but a plurality of divided arcuate members 2a (for example, 4 pieces) are applied from the horizontal direction with bolts 5 and nuts 6. Since the method of linking is performed, precise alignment work is not necessary. Therefore, it is excellent in workability (workability).
3) Since the adhesive 3 is used as a joining means between the pile head of the foundation pile 10 and the steel cylindrical member 2 with the anchor member, there is no risk of liquid leakage and the formwork is unnecessary. Moreover, since the bonding thickness can be made very thin, the strength and rigidity of the pile head of the foundation pile 10 can be extremely rationally improved as compared with the case of bonding with mortar or cement paste. .
4) In addition to the adhesive 3, the steel cylindrical member 2 with anchor member is fastened and fixed to the steel pipe 10a at the head of the pile by bolt joining means, so the steel cylindrical member 2 with anchor member is fixed to the foundation pile. It is possible to join the ten pile heads so as to be able to transmit stress reliably.

  Hereinafter, an embodiment having a configuration different from that of the above embodiment will be further described.

(About the structure of the joint)
In FIG. 1, all the joint portions 2b of the arc-shaped member 2a are implemented by flange joint portions 2b provided so as to protrude outward from both circumferential edges, but the present invention is not limited to this.
As shown in FIG. 2, of the connecting portions between the adjacent arc-shaped members 2 a, 2 a, one connecting portion is between the flange joint portions 2 b, 2 b provided at one circumferential edge of the arc-shaped member 2 a. It is also possible to implement a configuration in which the hinges 2b 'and 2b' provided on the one side edge in the circumferential direction of the arcuate member 2a are connected to each other with a pin 7. That is, the plurality of arcuate members 2a are configured as a series of structures in which the adjacent arcuate members 2a and 2a are connected to each other by the pin 7 at the hinge joint portions 2b ′ and 2b ′, and the plurality of arcuate shapes formed as the series of configurations The flange joint portions 2b and 2b formed at both end portions of the member 2a can also be implemented by connecting them by bolt joining (invention according to claim 5).
According to the embodiment according to FIG. 2, the adjacent arc-shaped members 2 a and 2 a can be rotatably connected by the hinge joint portion 2 b ′. Therefore, in a state where a plurality of (four) arcuate members 2a are connected in series, the work of attaching the pile head of the foundation pile 10 to the outer periphery of the steel pipe 10a (bonding work) is performed continuously and quickly. It is possible to perform a flexible connection operation such as

(About the configuration using a belt member)
As shown in FIG. 1A and FIG. 2A, at the stage where the work of bonding and fixing the steel cylindrical member 2 with an anchor member to the outer periphery of the steel pipe 10a of the pile head of the foundation pile 10 has been completed (for details, see paragraph [ 0024]), and a step of tightening the steel cylindrical member 2 with the anchor member (a plurality of circularly arcuate members 2a formed in a cylindrical shape) with a belt member (not shown) that can be wound from the outside. (Invention according to claim 3). This step may be performed after connecting the adjacent arc-shaped members 2 a and 2 a with the bolt 5 or before connecting with the bolt 5.
The belt member naturally includes, for example, a belt member made of carbon material that has been attracting attention in recent years, in addition to a wire, a rope, a chain, or a steel belt. The various belt members are wound (clamped) by applying a predetermined tension to the outer peripheral surface of the steel cylindrical member 2 with an anchor member in one or more stages.
According to the embodiment using this belt member, the adhesive force (adhesive force by the adhesive 3) of the steel cylindrical member 2 with an anchor member to the steel pipe 10a can be further increased. Therefore, the said steel cylindrical member 2 with an anchor member can be joined to the pile head part of the foundation pile 10 so that stress transmission is possible more reliably.
In addition, the said belt member is after judging that the said steel cylindrical member 2 with an anchor member is being firmly fixed to the steel pipe outer periphery of the pile head of the foundation pile 10 (elapse of predetermined time, or measurement by an apparatus). It may be removed (refer to FIGS. 1A and 2A with reference to the inventions according to claims 6 and 7), or may be left without being removed (invention according to claim 9).

When the belt member is used, the arcuate member 2 is not provided with joint portions 2b and 2b '(flange joint portion and hinge joint portion), and the steel cylindrical member 2 with an anchor member is exactly connected in the circumferential direction. It can also be implemented in a shape equal to that divided into two. In short, the steel pipe of the pile head portion of the foundation pile 10 can be obtained by connecting each arc-shaped member 2 with the adhesive force by the adhesive 3 and the fastening force by the belt member without connecting the adjacent arc-shaped members 2 and 2 to each other. This is a technique of bonding and fixing the steel cylindrical member 2 with an anchor member to the outer periphery of 10a (inventions according to claims 2 and 8).
Even in the embodiment using this belt member, it is possible to further increase the adhesive force (adhesive force by the adhesive 3) of the steel cylindrical member 2 with an anchor member to the steel pipe 10a. The cylindrical member 2 can be reliably joined to the pile head of the foundation pile 10 so as to be able to transmit stress.

(Regarding the configuration of the upper end of the arc-shaped member)
A hooking portion 8 (refer to the broken line in FIG. 2C) placed on the upper surface of the pile head of the foundation pile 10 is protruded from the upper end portion of the arcuate member 2a according to FIGS. 1 and 2 by a joining means such as welding. (The invention according to claim 11). The hooking portion (projecting piece) 8 has an effect of facilitating the positioning work when the arcuate member 2a is bonded to the outer periphery of the steel pipe 10a of the pile head. Although one or two hanging portions 8 according to the illustrated example are provided for one arcuate member 2a, of course, the quantity is appropriately changed in design.

(About the structure of the anchor member)
1 and 2, the anchor rebar (anchor member) 1 is welded directly to the arcuate member 2a. However, as shown in FIG. 3, a flat steel (flat bar) is formed on the outer peripheral surface of the arcuate member 2a. (Steel plate) 4 can also be carried out by welding. By interposing the flat steel 4, there is an effect that the rigidity of the pile head of the foundation pile 10 can be increased. Of course, the joint between the arc-shaped member 2a and the flat steel 4 is appropriately devised such as taking a groove so that welding of the abutting portion of the flat steel 4 to the arc-shaped member 2a is facilitated. The size of the flat bar 4 (particularly the protruding dimension) can be appropriately changed according to the structural design. For example, as shown in FIG. 4B, the flat bar 4 having the same shape and the same size is used. Alternatively, as shown in FIG. 4C, it is possible to use a flat steel 4 whose width is appropriately changed.
Thus, when the anchor member 1 is welded and joined via the flat steel 4, the pile head (foundation pile 10) can increase the virtual reinforced concrete section D compared to the case where the anchor member 1 is directly welded (see FIG. 4A and FIG. 4B or FIG. 4C in comparison), the rigidity (bending resistance) and strength of the pile head (foundation pile 10) can be increased.
Moreover, according to the foundation pile 10 concerning FIG. 4C, the flexible reinforcement which does not produce interference with the reinforcing bar arranged inside the foundation structure 11 can be performed by changing the width dimension of the flat bar 4 freely. There are also advantages.

(About the structure of the foundation pile)
5 and 6 show a foundation pile 10 developed by the present applicant. Although the foundation pile 10 which concerns on the said FIGS. 1-4 is the Example which assumed the SC pile 10, the foundation pile 10 which the said applicant developed instead of the SC pile 10 can implement similarly.
The foundation pile 10 developed by the present applicant is a steel pipe covered concrete pile (SPHC is a registered trademark of the present applicant) called SPHC pile (steel pipe covered high strength concrete pile). A steel pipe 10a provided in a concentric arrangement with a gap secured on the outer periphery of 10b and a filler 10c filled in the gap are integrally formed. Incidentally, the code | symbol 10d in a figure has shown the end plate of the PHC pile 10b.
The steel pipe 10a of the SPHC pile 10 is configured so that the upper end portion thereof is joined to the foundation of the foundation structure 11 so as to be able to transmit a horizontal force, and has a shorter length than the PHC pile 10b. Cement milk is mainly preferably used as the filler 10c.
5 and FIG. 6 are different in that the steel pipe 10a according to FIG. 5 is a hollow cylinder, whereas the steel pipe 10a according to FIG. 6 is a bottomed cylinder, and the other configurations are the same. .
Therefore, according to the SPHC pile (steel pipe covering concrete pile) 10 developed by the present applicant, the structure is the same as the SC pile 10 except that the steel pipe 10a is provided on the outside. Therefore, in exactly the same manner as in the above-described embodiment (see FIGS. 1 to 4), the arc-like member 2a constituting the steel cylindrical member 2 with the anchor member is subjected to the same procedure for the steel pipe 10a of the SPHC pile 10. (See paragraph [0032] above).
Therefore, the same effects as the above-described embodiment (see FIGS. 1 to 4) are obtained (see paragraph [0034] above).

  Although the embodiments have been described with reference to the drawings, the present invention is not limited to the illustrated examples and includes a range of design changes and application variations that are usually made by those skilled in the art without departing from the technical idea thereof. I will mention that just in case.

1 Anchor member (anchor rebar)
2 Steel cylindrical member with anchor member 2a Arc-shaped member 2b Joint part (flange joint part)
2b 'joint (hinge joint)
3 Adhesive 4 Flat steel 5 Bolt 6 Nut 7 Pin 8 Hook 10 Base pile 10a Steel pipe 11 Foundation structure 12 Ground D Virtual reinforced concrete cross section

Claims (13)

This is a pile head treatment method in which a steel cylindrical member with an anchor member such as an anchor rebar for joining the foundation structure is provided on the pile head of a foundation pile having a steel pipe on the outer periphery of the pile head. And
The steel cylindrical member with an anchor member has an inner diameter substantially equal to a pile diameter of a pile head of the foundation pile, and includes a plurality of arc-shaped members having a shape substantially equal to a shape divided in a circumferential direction. , While adhering the plurality of arc-shaped members with an adhesive along the outer circumference of the steel pipe of the pile head of the foundation pile driven into the ground, or forming a cylindrical shape, the adjacent arc shape The pile head processing method characterized by bonding and fixing the steel cylindrical member with an anchor member to the steel pipe outer periphery of the pile head part of the foundation pile by connecting members. This is a pile head treatment method in which a steel cylindrical member with an anchor member such as an anchor rebar for joining the foundation structure is provided on the pile head of a foundation pile having a steel pipe on the outer periphery of the pile head. And
The steel cylindrical member with an anchor member has an inner diameter substantially equal to a pile diameter of a pile head of the foundation pile, and includes a plurality of arc-shaped members having a shape substantially equal to a shape divided in a circumferential direction. The plurality of arc-shaped members bonded to each other with an adhesive in a configuration in which the arc-shaped members are not connected to each other along the outer periphery of the steel pipe of the pile head of the foundation pile driven into the ground, and then formed into the cylinder shape. The steel cylindrical member with the anchor member is bonded and fixed to the outer periphery of the steel pipe of the pile head of the foundation pile by tightening the arc-shaped member with a belt member that can be wound from the outside. , Pile head processing method. This is a pile head treatment method in which a steel cylindrical member with an anchor member such as an anchor rebar for joining the foundation structure is provided on the pile head of a foundation pile having a steel pipe on the outer periphery of the pile head. And
The steel cylindrical member with an anchor member has an inner diameter substantially equal to a pile diameter of a pile head of the foundation pile, and includes a plurality of arc-shaped members having a shape substantially equal to a shape divided in a circumferential direction. Adhering the plurality of arc-shaped members with an adhesive along the outer circumference of the steel pipe of the pile head of the foundation pile driven into the ground, or forming a cylindrical shape, or forming an adjacent arc shape After connecting the members together, a plurality of arc-shaped members formed in the cylindrical shape can be tightened with a belt member that can be wound from the outside, or the plurality of arc-shaped members formed in the cylindrical shape can be wound from the outside. The steel cylindrical member with the anchor member is bonded and fixed to the outer periphery of the steel pipe of the pile head of the foundation pile by connecting adjacent arc-shaped members after tightening with a simple belt member. , Pile head processing method.   The plurality of arc-shaped members have flange joint portions at both circumferential ends of each arc-shaped member, and the flange joint portions are connected by bolt joining to form the steel cylindrical member with the anchor member. The pile head processing method according to claim 1 or 3, which is characterized.   The plurality of arc-shaped members have a series of configurations in which adjacent arc-shaped members are pin-connected by a hinge joint portion, and flange joint portions formed at both ends of the plurality of arc-shaped members having the series configuration are bolted. The pile head processing method according to claim 1 or 3, wherein the steel cylindrical member with an anchor member is formed by connecting with each other.   The said belt member removes, after judging that the steel cylindrical member with an anchor member is being fixed to the steel pipe outer periphery of the pile head part of the said foundation pile, The Claim 2 or 3 characterized by the above-mentioned. Pile head processing method. A pile head processing structure in which a steel cylindrical member having an anchor member such as an anchor reinforcing bar for joining to a foundation structure is provided on a pile head of a foundation pile having a steel pipe on the outer periphery of the pile head Because
The steel cylindrical member with an anchor member has an inner diameter substantially equal to a pile diameter of a pile head of the foundation pile, and includes a plurality of arc-shaped members having a shape substantially equal to a shape divided in a circumferential direction. A pile head processing structure, wherein a steel pipe outer periphery of a pile head of the foundation pile driven into the ground and a plurality of arcuate members connected in a cylindrical shape are fixed with an adhesive. A pile head processing structure in which a steel cylindrical member having an anchor member such as an anchor reinforcing bar for joining to a foundation structure is provided on a pile head of a foundation pile having a steel pipe on the outer periphery of the pile head Because
The steel cylindrical member with an anchor member has an inner diameter substantially equal to a pile diameter of a pile head of the foundation pile, and includes a plurality of arc-shaped members having a shape substantially equal to a shape divided in a circumferential direction. A plurality of arc-shaped members formed in a cylindrical shape in a configuration not connected to the steel pipe outer periphery of the pile head of the foundation pile driven into the ground are fixed with an adhesive, and further formed in the cylindrical shape. A pile head processing structure, wherein a plurality of arcuate members are sandwiched between belt members. A pile head processing structure in which a steel cylindrical member having an anchor member such as an anchor reinforcing bar for joining to a foundation structure is provided on a pile head of a foundation pile having a steel pipe on the outer periphery of the pile head Because
The steel cylindrical member with an anchor member has an inner diameter substantially equal to a pile diameter of a pile head of the foundation pile, and includes a plurality of arc-shaped members having a shape substantially equal to a shape divided in a circumferential direction. The steel pipe outer periphery of the pile head of the foundation pile driven into the ground and a plurality of arc-shaped members connected in a cylindrical shape are fixed with an adhesive, and further a plurality of arc-shaped members connected in the cylindrical shape The pile head processing structure characterized by being clamped by the belt member.   The pile head processing structure according to any one of claims 7 to 9, wherein the foundation pile is a steel pipe covered concrete pile.   The hook part which mounts on the upper surface of the pile head part of the said foundation pile is protrudingly provided by the upper end part of the circular-arc-shaped member which comprises the said steel cylindrical member with an anchor member, It is characterized by the above-mentioned. The pile head processing structure described in any one of 10 items.   The anchor member of the steel cylindrical member with the anchor member is joined to an outer peripheral surface of the arc-shaped member via a flat steel, according to any one of claims 7 to 11. Pile head processing structure.   A steel cylindrical member with an anchor member used in the pile head processing structure according to any one of claims 7 to 12, comprising an inner diameter substantially equal to a pile diameter of a pile head of the foundation pile, and circumferential direction An anchor member characterized in that a plurality of arc-shaped members having substantially the same shape as the shape divided into two and having joint portions formed on both side edges in the circumferential direction are connected in a cylindrical shape by the joint portions. A cylindrical member made of steel.

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