JP2003221827A - Piling implement, reinforcing pipe, and piling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing pile having an inexpensive piling implement by which an embedding work is facilitated in a simple constitution and reinforced piling can be easily formed. <P>SOLUTION: An excavation blade 26 made of steel plate is integrally welded in a condition inclining in the same peripheral direction, on the outer peripheral face of the steel cylindrical body 25. A steel excavation claw 28 is integrally welded to the corner part of the oblique front edge of the excavation blade 26. The excavation claw 28 is installed so that the protruded direction extends along the tangential direction of a circle having the central axis of the body 25 in the corner of the excavation blade 26, in the center, to form a piling implement 22. A reinforcing rod 30 is arranged by welding between the piling implement and a seat plate 23. Concrete is placed with the centrifugal forming to integrally form a concrete pile 21 and the reinforcing pile 16 is formed. In this way, it can be easily manufactured in a simple structure. Thereby, even if there is a wooden root or the like, ground can be easily excavated and the pile can be buried. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a pile construction jig for burying a pile in the ground, a reinforcing pile to be buried in the ground, and
The present invention relates to a pile construction method for burying a pile in the ground.

[0002]

[Background Art] Generally, when a residential land is constructed by landfilling a paddy field, a valley, or a seaside, the ground becomes a relatively soft landfill. Therefore, if a building such as a house is built immediately, there is a possibility that ground subsidence will occur. For this reason, it is necessary to wait a considerable period of time until the subsidence of subsides is settled after the residential land is constructed and before the house is built. Moreover, it is difficult to build a structure in a place where the ground is originally soft rather than in a landfill.

Therefore, conventionally, when a building is built on a relatively soft ground, reinforcing piles are buried and the building is built integrally with these reinforcing piles to stabilize the building. There is. As a method of burying such a reinforcing pile, for example, a configuration described in Japanese Patent Laid-Open No. 11-209977 (Patent Document 1) is known.

The one disclosed in Japanese Patent Laid-Open No. 11-209977 is a projection in which a drilling blade is provided in a spiral shape on the outer peripheral surface of a substantially cylindrical pile, and the base end of which is detachably engaged with a pile construction jig. Use a reinforcement pile with. Then, the pile construction jig in a state where the reinforcing piles are connected is rotated to embed the reinforcing piles in the ground.

However, for example, when there are tree roots and gravel in the ground, the excavation blades of the reinforcing pile come into contact with the tree roots and gravel. As a result, there is a possibility that the reinforcing pile cannot be embedded to a predetermined depth, such as an increase in frictional force, which results in a large rotational load, or damage to the excavation blade that prevents proper excavation.

Therefore, as described in, for example, Japanese Utility Model Laid-Open No. 1-69835 (Patent Document 2), an auger machine is used to make a drill hole at a predetermined position on the ground, and then a pile is buried in the drill hole. The configuration is adopted. However, the number of steps is large, the time required to bury a plurality of piles becomes long, and the construction period cannot be shortened.

Further, as described in Japanese Patent Laid-Open No. 8-284165 (Patent Document 3), a socket having spiral excavation blades is integrally attached to the tip of an embedded pile, and the socket is rotated together with the pile. Then, the structure is adopted in which the pile is buried while excavating with the socket. However, even the one disclosed in Japanese Patent Laid-Open No. 8-284165 cannot satisfactorily bury a pile to a predetermined depth when there are roots and gravel in the ground.

Further, as described in Japanese Patent No. 2893443 (Patent Document 4), the tip of the steel pipe is formed in a spindle shape, and a plurality of blades twisted in the rotating direction of the steel pipe are equidistantly formed on the peripheral side surface. It is known to bury piles that project at. However, even with the one disclosed in Japanese Patent No. 2893443, it is not possible to satisfactorily bury the pile to a predetermined depth when there are roots, gravel, and the like in the ground. Further, due to friction with the ground, the ground may not be reached and sufficient supporting force may not be obtained.

[0009]

[Patent Document 1] Japanese Patent Laid-Open No. 11-209977 (second
Page right column-page 3 right column)

[Patent Document 2] Japanese Utility Model Laid-Open No. 1-69835 (Fig. 4,
(Fig. 5)

[Patent Document 3] Japanese Unexamined Patent Publication No. 8-284165 (page 2, right column-page 3, right column)

[Patent Document 4] Japanese Patent No. 2893443 (page 2, left column-page 3, left column, FIG. 1)

[0010]

Therefore, for example, it is conceivable to increase the thickness of the excavation blade, cut the root of the tree, scrape off the gravel without damaging it, and embed it to a predetermined depth. . However, it is difficult to form the excavation blade having a certain thickness in a spiral shape, and the cost of the reinforcing pile increases significantly. This causes a problem that the cost of the building to be built also increases.

In view of the above problems, it is an object of the present invention to provide an inexpensive pile construction jig, a reinforcement pile and a pile construction method which have a simple structure, facilitate the burying work and can be easily formed.

[0012]

The invention according to claim 1 is
A pile construction jig for burying a pile, which is connected to a building constructed on the ground and supports the building, in the ground, wherein the pile is provided in a substantially cylindrical shape and is continuously provided substantially coaxially. A body portion, a plate-shaped excavating blade integrally joined to the outer peripheral surface of the body portion in a state where a plane intersects the axial direction of the body portion in an inclined state, and at least a corner portion of the excavating blade. The pile construction jig further comprises: an excavation claw portion provided so as to project in a circumferential direction of the corner portion around the center axis of the body portion.

According to the present invention, on the outer peripheral surface of the substantially cylindrical body portion which is continuously provided substantially coaxially with the pile which is buried in the ground and is connected to the building constructed on the ground to support the building.
The plate-shaped excavating blades are integrally joined in a state where the plane intersects the axial direction of the fuselage at an angle, and at the same time, at least at the corners of the excavating blade, the corners around the center axis of the fuselage are centered. The excavation claw portion is provided so as to project in the circumferential direction. With this, a simple structure in which a plate-shaped excavation blade is joined to a cylindrical body to provide an excavation claw portion, and for example, even if roots and gravel exist in the ground, it is possible to excavate relatively thickly It is easy to provide excavation blades, which improves manufacturability and reduces costs, and the piles are easily buried to a predetermined depth, so that stable support of the building can be obtained.

The invention according to claim 2 is, in the pile construction jig according to claim 1, characterized in that a plurality of excavating blades are joined in a state of being inclined in the same direction in the circumferential direction of the body portion. .

In the present invention, a plurality of excavating blades are joined in a state in which they are inclined in the same direction in the circumferential direction of the body portion. As a result, the stress during excavation is dispersed, damage to the excavation blades is prevented, and the load is approximately evenly overall, allowing good excavation along the vertical direction and ensuring that the piles reach the specified depth. It is easily buried.

According to a third aspect of the invention, in the pile construction jig according to the first or second aspect, the tip of the excavating blade in the inclining direction is circumferentially projected from the outer peripheral surface of the body portion. It is characterized in that the excavated claw portion is joined and is provided so as to project in the tangential direction at the position of the corner of the tip edge of the excavation blade.

In the present invention, the tip end edge of the excavation blade in the inclined direction is provided so as to project in the circumferential direction from the outer peripheral surface of the body portion, and is directed tangentially at the corner of the tip edge of the excavation blade. The excavation claw portion is provided in a state of protruding. As a result, the excavation claw portion serves as a guide during excavation, stable excavation is obtained, and at least two corners of the excavation blade are provided.
Since the corners are located at different distances from the center axis of the body part, the protruding directions of the excavation claws are not parallel but are set in different directions, and the excavation claws are provided on a hard support base. When it reaches the position, the pile will be satisfactorily engaged with the support base, and the stable support state of the pile can be easily obtained.

According to a fourth aspect of the invention, in the pile construction jig according to any one of the first to third aspects, the body portion is
The excavation blade is formed of a steel pipe, and the excavation blade is formed of a steel plate and joined to the body portion by welding.

In the present invention, the excavation blade is formed of a steel plate and is joined by welding to the body portion formed of a steel pipe. This facilitates formation, improves manufacturability, reduces costs, and makes it easier to use relatively thick excavating blades, which facilitates stable and favorable excavation.

According to a fifth aspect of the present invention, in the pile construction jig according to any one of the first to fourth aspects, at least one plane of the excavation blade is provided along the tangential direction to the outer peripheral surface of the body. It is characterized by having a reinforcing portion.

According to the present invention, the reinforcing portion is provided on at least one plane of the excavating blade along the tangential direction to the outer peripheral surface of the body portion. As a result, the resistance to the stress acting on the excavation blade during excavation when burying a pile in the ground is improved, good burial work can be obtained, and when only a pile is reached when it reaches a relatively hard ground. Instead, the supporting force for supporting the structure by the excavation blades is also increased, and a good pile burying condition can be obtained.

According to a sixth aspect of the invention, in the pile construction jig according to the fifth aspect, the reinforcing portion is provided on a surface opposite to a surface of the excavation blade on the side where the pile is buried in the ground. It is characterized by being provided.

In the present invention, the reinforcing portion is provided on the surface of the excavation blade on the side opposite to the surface on the side where the pile is buried in the ground. This suppresses the resistance of the reinforcement part during excavation when burying piles in the ground, and also during excavation or when reaching a relatively hard ground to support a structure, excavation wings Even if is deformed, the reinforcing portion comes into contact with the body portion, the excavation blade is prevented from being largely deformed, and the reduction of excavability and the reduction of the supporting force of the building can be suppressed.

The invention according to claim 7 is the pile construction jig according to any one of claims 1 to 6, a pile connected to a body portion of the pile construction jig, the body portion and the pile. It is a reinforcing pile characterized by comprising a connecting means for connecting the.

In the present invention, the productivity is improved, the cost is reduced, and the pile is easily buried to a predetermined depth, and the pile is connected to the pile construction jig according to any one of claims 1 to 4 by a connecting means. To do. With this configuration, the pile is buried well and the structure is stably supported.

According to an eighth aspect of the present invention, in the reinforcing pile according to the seventh aspect, the pile is formed of concrete and is inserted into the body portion of the pile construction jig, and the connecting means is the body portion and the pile. It is characterized in that it is a concrete that is filled in between and joined.

According to the present invention, the pile formed of concrete is inserted into the body portion of the pile construction jig, and the connecting means, which is concrete, is filled between the body portion and the pile to be joined to form a unit. As a result, the pile and the pile construction jig are easily connected integrally, and the manufacturability is improved.

According to a ninth aspect of the present invention, in the reinforcement pile according to the eighth aspect, at least a portion of the pile fitted into the body portion is formed into a prismatic shape, and the body portion has an inner peripheral surface. It is characterized by having a projecting portion projecting toward one direction.

According to the present invention, the prismatic portion of the pile is fitted and connected to the body portion having the protrusion protruding inward from the inner peripheral surface. By this, for example, the connection strength in the circumferential direction of the body portion and the pile when the connection means is filled and integrally connected is increased, and the body portion and the pile are strong even when the connection means is filled and connected. Is integrally connected to.

According to a tenth aspect of the present invention, there is provided a reinforcing pile which is embedded in the ground and is connected to a building constructed on the ground to support the building, and which has a substantially cylindrical body portion and the body portion. A plate-shaped excavating blade integrally joined to the outer peripheral surface of the portion in a state where the plane intersects the axial direction of the body portion at an angle, and an excavating claw portion provided at a corner of the excavating blade. And a plurality of reinforcing rebars having one end in the longitudinal direction joined to the inner peripheral surface of the body portion in a state where the longitudinal direction is along the axial direction of the body portion, and the reinforcing body reinforcements are continuously connected to the body portion by concrete. And a pile integrally formed into a substantially cylindrical shape.

According to the present invention, the plate-shaped excavating blade is integrally joined to the outer peripheral surface of the substantially cylindrical body portion in a state where the plane intersects the axial direction of the body portion at an angle, and the excavation is performed. Excavation claws are provided at the corners of the wing. Further, one end of the longitudinal direction is joined to the inner peripheral surface of the body portion such that a plurality of reinforcing reinforcing bars are longitudinally aligned with the axial direction of the body portion. Then, a substantially cylindrical pile which covers the reinforcing bar with concrete and is continuous with the body is integrally provided. As a result, it is easy to provide a relatively thick excavation blade that can be excavated well at the tip of the pile with a simple structure, for example, even when there are tree roots and gravel in the ground. It can be manufactured using the manufacturing process of the pile, and the pile can be easily buried to a predetermined depth, and stable support of the building can be obtained.

The invention described in claim 11 is the reinforcing pile according to claim 10, wherein the pile is formed by centrifugal force.

In the present invention, the pile is formed by centrifugal force. This makes it possible to easily obtain a pile which is integrally continuous with the body portion to which the excavation blade is joined by using the conventional manufacturing process of concrete piles.

According to a twelfth aspect of the present invention, in the reinforcing pile according to the tenth or eleventh aspect, the body portion is made of steel, and the reinforcing bar is joined to an end portion of the pile opposite to the body portion in the axial direction. It is characterized in that it has a steel seat plate that can be joined by welding at the other end of the body.

According to the present invention, the steel seat plate to which the reinforcing reinforcing bar is joined can be joined to the end of the other fuselage portion by welding at the end opposite to the steel body portion in the axial direction of the pile. Provide integrally. As a result, even if the body has a body part in which the excavation blades are joined to the ends of the pile, it can be easily connected and buried, and the seat plate constitutes a part of the form at the time of forming the pile. However, manufacturing work is facilitated and manufacturability is improved.

According to a thirteenth aspect of the present invention, in the reinforcing pile according to any of the tenth to twelfth aspects, a plurality of excavation blades are joined in a state in which they are inclined in the same direction in the circumferential direction of the body portion. Is characterized by.

In the present invention, a plurality of excavation blades are joined in a state in which they are inclined in the same direction in the circumferential direction of the body portion. As a result, the stress during excavation is dispersed, damage to the excavation blades is prevented, and the load is approximately evenly distributed throughout the excavation, enabling good excavation along the vertical direction, and easily reaching a predetermined depth. Buried.

According to a fourteenth aspect of the present invention, in the reinforcing pile according to any one of the tenth to thirteenth aspects, the excavation blade has a state in which the tip edge in the inclined direction projects in the circumferential direction from the outer peripheral surface of the body portion. And the excavation claw portion is provided so as to project in the tangential direction at the corner of the tip edge of the excavation blade.

According to the present invention, the tip edge of the excavating blade in the inclined direction is provided so as to project in the circumferential direction from the outer peripheral surface of the body portion, and is directed tangentially at the corner portion of the tip edge of the excavating blade. The excavation claw portion is provided in a state of protruding. As a result, the excavation claw portion serves as a guide during excavation, stable excavation is obtained, and at least two corners of the excavation blade are provided.
Since the corners are located at different distances from the center axis of the body part, the protruding directions of the excavation claws are not parallel but are set in different directions, and the excavation claws are provided on a hard support base. When it reaches the position, the pile will be satisfactorily engaged with the support base, and the stable support state of the pile can be easily obtained.

According to a fifteenth aspect of the present invention, in the reinforcing pile according to any one of the tenth to fourteenth aspects, a projection provided on the outer peripheral surface near the end of the pile opposite to the body portion in the axial direction. It is characterized by having a section.

According to the present invention, the protrusion is provided on the outer peripheral surface in the vicinity of the end opposite to the body portion in the axial direction of the pile. This makes it easy to hold and rotate the pile, for example, by inserting the end of the pile on the side opposite to the body part in the axial direction and locking the projection, and the pile is easily embedded and the projection is Can be used as a standard for the buried condition, and the workability of burying piles is improved.

According to a sixteenth aspect of the present invention, in the reinforcing pile according to any one of the tenth to fifteenth aspects, a reinforcing portion provided on at least one plane of the excavating blade along a tangential direction to an outer peripheral surface of the body portion. Is provided.

In the present invention, the reinforcing portion is provided on at least one plane of the excavating blade along the tangential direction to the outer peripheral surface of the body portion. As a result, the resistance to the stress acting on the excavation blade during excavation when burying in the ground is improved, good burial work can be obtained, and when the relatively hard ground is reached, the excavation blade is used for construction. Supporting power to support things is also obtained,
A good buried condition can be obtained.

According to a seventeenth aspect of the present invention, in the reinforcing pile according to the sixteenth aspect, the reinforcing portion is provided on the surface of the excavation blade opposite to the surface on the side where the pile is buried in the ground. It is characterized by that.

In the present invention, the reinforcing portion is provided on the surface of the excavation blade on the side opposite to the surface on the side where the pile is buried in the ground. This suppresses the resistance of the reinforcing part during excavation when it is buried in the ground, and the excavation blades are tentatively deformed during excavation or when reaching a relatively hard ground to support a structure. Even in this case, the reinforcing portion is brought into contact with the body portion, the excavation blade is prevented from being largely deformed, and the reduction of excavability and the reduction of the supporting force of the building can be suppressed.

The invention according to claim 18 uses the reinforcing pile according to any one of claims 7 to 17, wherein the reinforcing pile is in a state where the axial direction is substantially vertical and the body portion of the reinforcing pile is The side provided is held in a state of being the lower end side, and the retained reinforcement pile is retained in the direction in which the surface of the excavation blade on the side where the pile is led out from the body portion of the reinforcement pile is inclined in the circumferential direction of the body portion. It is a pile construction method characterized by rotating a reinforcement pile and burying it from a ground surface to a predetermined depth position.

According to the present invention, the reinforcing pile according to any one of claims 7 to 17 is held in a state where the axial direction is substantially vertical and the side where the body portion of the reinforcing pile is provided is the lower end. Then, the reinforcing pile is rotated in a direction in which the surface of the excavation blade on the side where the pile is led out from the body portion is inclined in the circumferential direction of the body portion, and the reinforcement pile is buried to a position of a predetermined depth from the ground surface. As a result, for example, even when there are tree roots and gravel in the ground, it is possible to excavate well and bury it up to a predetermined position, and stable support of the building can be obtained.

[0048]

BEST MODE FOR CARRYING OUT THE INVENTION [First Embodiment] A first embodiment of the reinforcing pile of the present invention will be described below with reference to the drawings.

(Structure of Pile Driving Device) First, the structure of a device for burying a reinforcing pile will be described below with reference to the drawings. FIG. 1 is an explanatory view illustrating an operation of burying a reinforcing pile by a pile driving device for forming a concrete foundation. FIG. 2 is a cross-sectional view illustrating a situation in which a pile is buried. FIG. 3 is a perspective view showing a pile driving jig. Figure 4
It is a side view which shows the positional relationship of the protrusion at the time of burying a reinforcement pile.
FIG. 5: is a side view which shows the positional relationship of the protrusion at the time of pulling out a reinforcement pile.

In FIG. 1, reference numeral 1 is a pile driving device, and the pile driving device 1 includes a crane vehicle 3 having a crane 2. The crane 2 of the crane vehicle 3 is configured to be rotatable, rotatable in the vertical direction, and extendable / contractible. Further, the crane vehicle 3 is provided with a jack 4 for preventing falling.

Further, the pile driving device 1 is equipped with, for example, a hydraulic motor 6 as a driving means capable of rotating in the forward and reverse directions. The hydraulic motor 6 has a spline output shaft 7 that is rotatable by driving an engine (not shown) of the crane vehicle 3, for example. The hydraulic motor 6 is detachably attached to the tip of the crane 2 in a state where the spline output shaft 7 extends substantially along the vertical direction, which is the vertical direction. The rotation torque of the hydraulic motor 6 can be recognized by a torque meter (not shown) provided on the crane cab 8 of the crane vehicle 3.

Further, the pile driving device 1 is provided with the pile driving jig 10
Is equipped with. This pile driving jig 10 is shown in FIGS.
As shown in (1), it has a substantially columnar cylindrical portion 11. A substantially cylindrical mounting portion 12 is provided coaxially and integrally with the tubular portion 11 at one end of the tubular portion 11. The outer diameter of the mounting portion 12 is smaller than the outer diameter of the tubular portion 11, and the spline output shaft 7 of the hydraulic motor 6 is detachably fitted to the inner periphery of the mounting portion 12. The mounting portion 12 has a plurality of grooves (not shown) along the axial direction on the inner peripheral surface thereof so that the spline output shaft 7 of the hydraulic motor 6 can be fitted therein.

Further, in the mounting portion 12 of the pile driving jig 10,
A bolt hole 13 is provided that penetrates in the radial direction. The spline output shaft 7 of the hydraulic motor 6 is fitted to the mounting portion 12 of the pile driving jig 10, and the bolt is inserted into the bolt hole 13 and a bolt hole (not shown) provided in the spline output shaft 7 of the hydraulic motor 6 so as to penetrate therethrough. Install 14. As a result, the pile driving jig 10 becomes the hydraulic motor 6
Is rotatably attached to the spline output shaft 7 with the central axis as the axis of rotation in a state where the axial direction is along the vertical direction.

A plurality of bolt holes 13 are provided in the mounting portion 12 of the spline output shaft 7 and the pile driving jig 10 along the axial direction. Then, the predetermined bolt hole 13 is selected, and the pile driving jig 10 is attached with the bolt 14.
As a result, the pile driving jig 10 can be selectively attached at a predetermined position in the axial direction of the spline output shaft 7.

Further, at the other end of the tubular portion 11, a substantially cylindrical fitting portion 15 having an outer diameter larger than that of the tubular portion 11 is integrally provided coaxially with the tubular portion 11. A substantially cylindrical reinforcing pile 16 is detachably fitted to the fitting portion 15 on the inner circumference.

The fitting portion 15 of the pile driving jig 10 is provided with a pair of notches 17 located in the radial direction of the fitting portion 15. The cut portion 17 is provided along the axial direction of the fitting portion 15 so as to be continuous with the end edge, that is, the lower end edge in the state of being attached to the hydraulic motor 6. Further, an engaging portion 18 is notched in each of the cut portions 17. The engagement portion 18 is located on the opposite side of the lower end edge of the fitting portion 15 along the circumferential direction of the fitting portion 15 and rotates the spline output shaft 7 of the hydraulic motor 6 when the reinforcing pile 16 is buried. It is provided toward the direction. Due to the cutout portion 17 and the engaging portion 18, a substantially inverted L-shaped engaging means 19 is provided at a substantially symmetrical position in the radial direction of the fitting portion 15.

(Structure of Reinforcing Pile) Next, the reinforcing pile will be described below with reference to the drawings. FIG. 6 is a cross-sectional view showing the reinforcing pile. FIG. 7: is a perspective view which shows the connection part of a reinforcement pile. FIG. 8: is explanatory drawing explaining the excavation condition by the pile construction jig of a reinforcement pile. FIG. 9 is a perspective view showing a pile construction jig. FIG. 10 is a plan view illustrating an arrangement state of the excavation claw portions of the pile construction jig.

Reinforcement pile 1 attached to the pile driving jig 10
6 is, as shown in FIGS. 1, 2 and 4 to 8,
Concrete pile portion 21 which is a pile, and a pile construction jig 2 integrally provided at one end of the concrete pile portion 21 in the axial direction.
2 and a seat plate 23 integrally provided at the other end of the concrete pile portion 21 in the axial direction.

The pile construction jig 22 has a substantially cylindrical body portion 25, as shown in FIGS. 1 and 6 to 10. The body portion 25 is, for example, a steel pipe having an outer shape of about 10 cm, a length dimension of about 30 cm, and a wall thickness dimension of about 5 m.
It is formed in a cylindrical shape of m.

A plurality of flat plate-shaped excavating blades 26, for example, a pair, are provided on the outer peripheral surface of the body portion 25. The excavation blade 26 is made of, for example, a steel plate and has a vertical dimension of about 20 cm,
It is formed in a flat plate shape having a lateral dimension of about 10 cm and a thickness dimension of about 5 to 7 mm. An arcuate notch 27 is provided on one side in the longitudinal direction of the excavation blade 26.

In the excavation blade 26, the notch 27 is engaged with the outer peripheral surface of the body portion 25, and the plane is inclined so that the plane intersects the axial direction of the body portion 25 and is integrally joined by, for example, welding. ing. Further, the excavation blade 26 is the excavation blade 2
The edge located on the tip side of the reinforcing pile 16 which is the tip edge of the inclined direction of 6 is joined to the outer peripheral surface of the body portion 25 so as to project in the circumferential direction without being continuous. In addition, the plurality of excavation blades 26 are inclined in the same direction, that is, the plane on the concrete pile portion 21 side derived from the body portion 25 on the same plane side is inclined in the same direction in the circumferential direction of the body portion 25. It is provided.

Further, a corner 26a of the excavation blade 26 is provided with an excavation claw 28. These excavation claws 28 are formed in a wedge shape by casting, for example. The excavation claw portion 28 is joined, for example, by welding to the lower surface side of the excavation blade 26, that is, the surface opposite to the side where the concrete pile portion 21 that is the tip end side of the reinforcing pile 16 is led out from the body portion 25. . Further, the excavation claw portion 28 is joined such that the tip side protruding from the excavation blade 26 is gradually thinned. Furthermore, the excavation claw portion 28, as shown in FIG.
Centering on the central axis of the body portion 25, the corner portion 26 of the excavation blade 26
It is projected and welded from the excavation blade 26 along the tangential direction at the corner portion 26a at the circumference passing through a.

The pile construction jig 22 has a maximum diameter of about 30c when it is rotated about the central axis of the body portion 25.
It is formed to be m. That is, the excavation blade 26
Are joined in a state in which an outer peripheral corner portion 26a of the tip edge of the excavation blade 26 is separated from the center of the body portion 25 by about 15 cm. As a result, the pile construction jig 22 has an excavation hole 29 having a diameter of about 30 cm, as shown in FIG.

On the other hand, the concrete pile portion 21 is formed by covering the elongated reinforcing bar 30 with concrete 31, as shown in FIGS. The reinforcing reinforcing bar 30 has a plurality of deformed bar reinforcing bars 32 arranged along the axial direction, and lateral restraining reinforcing bars 33 spirally arranged along the circumferential direction. The deformed bar bars 32 have one end in the longitudinal direction, which is the axial direction, joined to the inner peripheral surface of the body portion 25 at substantially equal intervals in the circumferential direction by, for example, welding. The laterally restrained reinforcing bars 33 are joined to the deformed bar bars 32 in a spiral shape on the outer peripheral side so as to bundle the deformed bar bars 32, for example, by welding or the like. It should be noted that the concrete pile portion 21 may be one in which the laterally constrained reinforcing bars 33 are not spiral but have an annular shape in the circumferential direction, one without the lateral constraining reinforcing bars 33, and one without the reinforcing reinforcing bars 30.

Further, as shown in FIGS. 6 and 7, the seat plate 23 provided at the end of the concrete pile portion 21 has a substantially disc ring shape having a flange portion 34a which is bent substantially vertically at the peripheral edge. It has a disk portion 34b. An end portion of the reinforcing bar 30 in the longitudinal direction is joined to the seat plate 23 by, for example, welding, and the flange portion 34a has a concrete pile portion 2
It is provided so as to be continuous with 1. Then, the reinforcing steel bars 30 are arranged between the pile construction jig 22 and the seat plate 23, and the reinforcing bars 30 are arranged in a predetermined mold (not shown). The concrete 31 is poured into the mold. By molding the concrete pile portion 21 into a cylindrical shape,
The reinforcement pile 16 is formed. This reinforcement pile 16 is a seat plate 23.
The side provided with is formed so that it can be fitted into the fitting portion 15 of the pile driving jig 10. As shown in FIGS. 6 and 7, the end portion of the body portion of the pile construction jig 22 is joined to the disc portion 34b of the seat plate 23 by welding 34c so that the reinforcing pile 16 is substantially coaxial. Can be connected to.

As shown in FIGS. 1, 2, 4 and 5, the reinforcing pile 16 is located on the outer peripheral surface near the end of the concrete pile portion 21 on the side where the seat plate 23 is provided. Projecting portion 35 is projected. A pair of the protrusions 35 are provided so as to protrude in the radial direction of the concrete pile portion 21. These protrusions 35 are made of steel, for example, and are welded to the reinforcing bars 30 of the concrete pile portion 21.

The projecting portion 35 is formed so as to be engageable with the notch 17 of the engaging means 19 of the pile driving jig 10. Further, the protrusion 35 attaches the reinforcing pile 16 to the pile driving jig 1
The hydraulic motor 6 is configured to be engageable with the engaging portion 18 of the engaging means 19 by rotating relative to 0 in the forward direction. When the protrusion 35 engages with the engaging portion 18, the reinforcement pile 16 is restricted from moving in the axial direction of the pile driving jig 10 and is attached to the pile driving jig 10 so as to be suspended and supported.

In the reinforcing pile 16, the protrusion 35 is formed by the forward rotation of the hydraulic motor 6 so that the notch 17 of the engaging means 19 is formed.
It comes into contact with the side edges of the pile driving jig 10 and is restricted in movement in the circumferential direction of the pile driving jig 10, and rotates together with the pile driving jig 10. As a result, the reinforcement pile 16 has the excavation claw portion 28 of the pile construction jig 22.
And is buried in the ground by the excavation blade 26. The buried reinforcement pile 16 is, for example, at a predetermined depth from the ground level (GL) whose upper surface is the ground surface, and the reinforcement pile 16 is
The protrusion 35 is buried in a position deeper than the freezing depth of the ground to be buried.

Further, the reinforcing pile 16 is restricted in movement in the circumferential direction of the pile driving jig 10 after the protrusion 35 engages with the engaging portion 18 of the engaging means 19 by the reverse rotation of the hydraulic motor 6, Rotate with the pile driving jig 10. As a result, the reinforcement pile 16 can be pulled out from the ground by the excavation blade 21.

On the other hand, the reinforcement pile 16 buried in the ground is
As shown in FIG. 11, the concrete foundation 41 is integrally formed. This concrete foundation 41 is formed by crushing stones 43 having a predetermined thickness dimension on the bottom surface of a root cutting groove 42 excavated in a groove shape on the ground, and forming on the crushed stones 43 by in-situ concrete pouring.

The concrete foundation 41 has a belt-shaped base 45 having a predetermined thickness dimension, for example, a thickness dimension of about 15 cm. The base 45 is formed by forming a frame around a rebar (not shown) formed on the crushed stone 43 as a shaft, and concrete is cast in situ so as to wrap the rebar in the frame. In addition, for example, the base 45 has a predetermined height dimension at a substantially central position in the width direction,
For example, a wall-shaped cloth base 46 of about 57 cm is provided. The cloth foundation 46 is formed by forming a frame around a reinforcing bar (not shown) projecting from the base 45 so as to surround the reinforcing bar formed in a frame, and concrete is cast in situ so as to wrap the reinforcing bar in the frame. . The base 45 and the cloth foundation 46 form an inverted T-shaped concrete foundation 41.

In this concrete foundation 41, the upper end of the reinforcing pile 16 embedded in the base 45 is at least 5c.
It is integrally formed in a state of being included in a space of m or more. That is, if the length is shorter than 5 cm, the joint strength between the reinforcing pile 16 and the concrete foundation 41 is reduced, and it becomes impossible to integrate them.
Therefore, the concrete foundation 41 is formed in a state where at least 5 cm or more of the upper end portion of the reinforcing pile 16 is included.

The reinforcing pile 16 is attached from the lower edge of the protrusion 35 to the upper end of the reinforcing pile 16 in a state where the reinforcing pile is attached to the pile driving jig 10 and is held along the vertical direction. Is formed so that the distance is longer than the thickness of the crushed stone 43 to be spread by 5 cm or more. Further, the distance from the lower edge of the protrusion 35 to the upper end of the reinforcement pile 16 is determined by the thickness of the crushed stone 43 to be spread, the thickness of the base 45 of the concrete foundation 41, and the thickness of the concrete foundation 4.
It is shorter than the sum of the height dimensions of the cloth foundation 46 of No. 1. In particular, the distance from the lower edge of the protrusion 35 to the upper end of the reinforcing pile 16 is 5 cm or more longer than the thickness of the crushed stone 43 to be spread, and the thickness of the crushed stone 43 to be spread and the thickness of the base 45 of the concrete foundation 41. A dimension shorter than the sum of the length dimensions is preferred.

Here, from the bottom surface of the protrusion 35, the reinforcement pile 16
When the distance to the upper end of the concrete foundation 41 and the reinforcing pile 16 is less than 5 cm than the thickness of the crushed stones 43 to be spread, the connection strength between the concrete foundation 41 and the reinforcing pile 16 is reduced, and integration cannot be performed. On the other hand, from the lower surface of the protrusion 35, the reinforcement pile 16
If the length of the crushed stone 43, the thickness of the base 45 of the concrete foundation 41 and the height of the cloth foundation 46 of the concrete foundation 41 is longer than the sum of the distances to the upper end of As a result, the upper end of the concrete projecting state cannot be built on the concrete foundation 41. As a result, the protrusion 35 of the reinforcing pile 16 has a distance from the lower surface to the upper end of the reinforcing pile 16 that is greater than the thickness dimension of the crushed stones 43 spread by 5 mm.
It is provided at a position of a length longer than cm and shorter than the sum of the thickness of the crushed stone 43 to be spread, the thickness of the base 45 of the concrete foundation 41, and the height of the cloth foundation 46 of the concrete foundation 41.

In particular, the distance from the lower surface to the upper end of the reinforcement pile 16 is set to be 5 from the thickness dimension of the crushed stones 43 that spreads the protrusions 35.
Under the condition that the length is longer than cm and the length is smaller than the sum of the thickness of the crushed stone 43 to be spread and the thickness of the base 45 of the concrete foundation 41, the reinforcing pile 16 is provided.
The upper end of the sheet is not included in the cloth foundation 46. Therefore, the upper end of the reinforcing pile 16 can be included in the concrete foundation 41 regardless of the width dimension of the cloth foundation 46 and the outer diameter dimension of the reinforcing pile 16, and the versatility can be improved. Furthermore, the amount of protrusion of the reinforcing piles 16 protruding from the upper surface of the crushed stones 43 during the formation of the concrete foundation 41 is reduced, which becomes an obstacle during the formation of the concrete foundation 41, for example, the framing work of the reinforcing bars of the concrete foundation 41. It becomes difficult and the workability can be improved. By this, in particular,
The distance from the lower surface of the protrusion 35 to the upper end of the reinforcing pile 16 is
It is preferable that the size is 5 cm or more longer than the thickness of the crushed stone 43 to be spread, and that the size is shorter than the sum of the thickness of the crushed stone 43 to be spread and the thickness of the base 45 of the concrete foundation 41.

From these facts, for example, in the plain area of the Tohoku region, for example, when the freezing depth is about 25 cm, the crushed stones 43 are spread with a thickness of about 12 cm, and the base 45 of the concrete foundation 41 has a thickness of about 15 cm. The concrete foundation 41 is formed so that the cloth foundation 46 rises from the GL at a height of about 45 cm. That is, the height of the cloth foundation 46 is about 57c from the base 45.
m. And the concrete foundation 41 and the reinforcement pile 16
At least 5 cm or more for the upper end of the concrete foundation 41
Therefore, the distance from the lower surface of the protrusion 35 to the upper end of the reinforcing pile 16 is about 17 mm.
cm or more. In this embodiment, the protrusion 35
The distance from the lower surface of the to the upper end of the reinforcing pile 16 is about 17 cm. As a result, the upper end of the reinforcing pile 16 is located at a depth of about 22 cm from the GL, and is contained in the concrete foundation 41 at about 5 cm.

The amount of protrusion of the protrusion 35 is
Is engaged with the engaging means 19 and the reinforcement pile 16 is attached to the pile driving jig 10.
The projections 35 are formed so as not to project from the outer peripheral surface of the fitting portion 15 when they are connected. That is, the distance between the tips of the protrusions 35 protruding in the radial direction is formed to be less than or equal to the outer diameter of the fitting portion 15.

(Operation of Pile Driving Device) Next, the operation of forming the concrete foundation of the building according to the above-described embodiment will be described below with reference to the drawings. FIG. 11 is a cross-sectional view illustrating a state in which a concrete foundation is formed by forming a cloth foundation in a configuration for forming a concrete foundation. 12
[Fig. 3] is a cross-sectional view illustrating a state in which a root cutting groove is formed after burying a reinforcing pile in a step of forming a concrete foundation. FIG. 13 is a cross-sectional view illustrating a state in which crushed stones are spread in the step of forming a concrete foundation.
FIG. 14: is sectional drawing explaining the state which formed the base in the process of forming a concrete foundation.

First, the crane 2 of the crane vehicle 3 is operated in advance at a predetermined position, for example, a position where a through pillar of a building (not shown) stands, and the reinforcing pile 16 is seated with the side on which the pile construction jig is provided downward. The plate 23 side is positioned upward, and the plate 23 is erected so that the axial direction is substantially along the vertical direction. Also, the crane vehicle 3
The hydraulic motor 6 is attached to the tip of the crane 2. Further, the spline output shaft 7 of the hydraulic motor 6 is attached to the pile driving jig 1
It is fitted to the mounting portion 12 of 0. Then, the predetermined bolt hole 1
A bolt 14 is passed through 3, and the pile driving jig 10 is integrally attached to the spline output shaft 7.

Then, as shown in FIG. 4, the crane 2 is operated so that the reinforcing pile 16 in the standing state is fitted to the fitting portion 15 of the pile driving jig 10 and the protrusion 35 of the reinforcing pile 16 is fitted. Is engaged with the notch 17 of the engaging means 19.
After that, the hydraulic motor 6 is driven to drive the spline output shaft 7
Is rotated to rotate the pile driving jig 10. Due to the rotation of the pile driving jig 10 driven by the hydraulic motor 6, the projecting portion 35 of the reinforcing pile 16 is in contact with the side edge of the notch 17 of the engaging means 19, so that the reinforcing pile 16 is driven. Rotate with the jig 10. And the reinforcement pile 16 is
As shown in FIG. 1, it is buried in the ground by the excavation claw portion 28 and the excavation blade 26, and the lower surface of the protrusion 35 of the reinforcing pile 16 is deeper than the freezing depth, for example, the upper end of the reinforcing pile 16 is the ground. 2 from the ground level (GL) on the surface
The burying work is completed when the burial is performed up to a depth of 2 cm.

The burying until the lower surface of the protrusion 35, which serves as a reference for recognizing the burying state of the reinforcing pile 16, is deeper than the freezing depth, is exposed, for example, from the GL. Cylindrical part 11, fitting part 15 and mounting part 1
The stepped portion with respect to 2 or a portion such as the bolt 14 attached to the pile driving jig 10 that is easily visible is used as a visual reference. It should be noted that a mark attached to the pile driving jig 10 in advance, such as a tape or a writing tool, may be used as the visual reference. Then, this visual recognition standard is visually confirmed with a level 31 installed near the work site, for example, by a level 31 shown in FIG. 1, and the buried state of the reinforcing pile 16 is confirmed.

When burying the reinforcement pile 16, the torque meter of the crane operator's cab 8 is used to measure the rotational torque and the load during the burying to determine the softness of the ground and the reinforcement pile 1
Judge the buried state of No.6. For example, if converted into N value and becomes 5 or less, it is judged as soft ground and concrete milk is poured and hardened to take hardening measures.
The conditions for embedding such as the rotation speed of the spline output shaft 7 of the hydraulic motor 6 at the time of embedding and the pressure in the embedding direction due to the rotation of the crane 2 are appropriately set.

When the reinforcing pile 16 is buried, a weight or the like (not shown) is suspended at the tip of the crane 2 so that the reinforcing pile 16 is buried while confirming that the axial direction of the reinforcing pile 16 is along the vertical direction.

Here, when the reinforcement pile 16 is to be re-strike due to, for example, a design change or the reinforcement pile 16 being bent or buried at an angle, the spline output shaft 7 of the hydraulic motor 6 is replaced by the reinforcement pile 16. Rotate in the direction opposite to the rotation direction when burying. By this reverse rotation, as shown in FIGS. 2 and 5, the protrusion 35 of the reinforcing pile 16 engages with the engaging portion 18 of the engaging means 19 of the pile driving jig 10. And
The reinforcement pile 16 is pulled out by the excavation blade 26, and the crane 2 is operated to rotate the pile driving jig 10 upward so that the reinforcement pile 16 is pulled out. In addition, when removing the pulled-out reinforcement pile 16 from the pile driving jig 10, the reinforcement pile 16 is rotated with respect to the pile driving jig 10 in the rotation direction of the spline output shaft 7 at the time of embedding. As a result, the projecting portion 35 of the reinforcing pile 16 is disengaged from the engaging portion 18 of the engaging means 19 and positioned in the cut portion 17, and is removed by moving the reinforcing pile 16 in the axial direction. For the movement of the reinforcement pile 16, the removal work is facilitated by utilizing the weight of the reinforcement pile 16.

Then, when the embedding of the reinforcement pile 16 is completed, the driving of the hydraulic motor 6 is stopped, and the crane 2 is operated to rotate upward to remove the pile driving jig 10 from the reinforcement pile 16 to be embedded. . In this way, the reinforcing piles 16 are sequentially buried.

(Concrete Foundation Forming Operation) Next, as shown in FIG. 12, the ground around the buried reinforcing piles 16 is excavated by a backhoe or the like until the protrusions 35 are exposed. Further, the reinforcing piles 16 are connected to each other, that is, the excavated reinforcing piles 16 are communicated with each other so that a groove-shaped root cutting groove 42 is formed on the ground. Then, as shown in FIG. 13, crushed stones 43 are spread in the root cutting groove 42 from the lower surface of the projection 35 to a depth of about 12 cm, that is, from GL to a depth of about 37 cm.

After that, concrete is cast in situ on the crushed stones 43 that have been spread, so that the space between the crushed stones 43 is filled with concrete, so-called stering is performed so that the surface becomes substantially flat. In this state, the buried reinforcement pile 16 is about 5 from the upper surface of the crushed stone 43 whose upper end is flattened by the stacon.
cm is protruding.

Then, the reinforcing bars are assembled on the crushed stones 43 which are made substantially flat by the stacon, and a mold is formed so as to cover the reinforcing bars. After that, concrete is cast in-situ into the mold to cast concrete to a thickness of about 15 cm, that is, from GL to a depth of about 12 cm and hardened, and as shown in FIG. To form. When the base 45 is formed, the upper end of the reinforcing pile 16 protrudes from the upper surface of the crushed stone 43 by about 5 cm. Therefore, the protruding upper end of the reinforcing pile 16 is embedded in the concrete and enclosed by the base 45. Integrated with. The mold should be disassembled after the concrete is hardened.

Further, on the base 45 of the hardened concrete foundation 41, the reinforcing bars protruding from the base 45 are continuously framed with the reinforcing bars, and a form is formed so as to cover the reinforcing bars.
Then, concrete is cast in-situ into the formwork, and the concrete is poured and cured so that the height dimension is about 57 cm, that is, the height dimension from GL is 45 cm, and as shown in FIG. The cloth foundation 46 is formed, and the base 45 forms the substantially inverted T-shaped concrete foundation 41 in which the cloth foundation 46 is continuous. An anchor bolt (not shown) is provided upright before the cloth base 46 is cured. After the cloth base 46 is cured, the mold is disassembled. Then, the excavated root cutting groove 42 is backfilled up to approximately GL to build a building on the concrete foundation 41.

(Effect of Reinforcing Pile) According to the above-described embodiment, the following effects can be obtained.

(1) On the outer peripheral surface of the substantially cylindrical body portion 25,
The plate-shaped excavating blades 26 are integrally joined in a state in which the plane is inclined obliquely with respect to the axial direction of the body portion 25, and the excavating claw portions 28 are provided at the corners of the excavating blade 26 to form the body portion 2
5, a plurality of reinforcing reinforcing bars 30 are provided on the inner peripheral surface of the body 5 in the longitudinal direction.
5, one end in the longitudinal direction is joined in a state along the axial direction, and a substantially cylindrical concrete pile portion 21 continuous with the body portion 25 is integrally formed by covering the reinforcing bar 30 with concrete to form the reinforcing pile 16. To do. Therefore, with a simple configuration in which the plate-shaped excavation blade 26 having the excavation claw portion 28 is provided on the substantially cylindrical body portion 25, for example, excellent excavation is possible even when there are tree roots or gravel in the ground. A thick excavation blade 26 can be easily provided, the reinforcing pile 16 can be easily buried to a predetermined depth, and the concrete foundation 41 that can stably support the building even on soft ground can be easily formed. Further, even a structure in which the pile construction jig 22 is integrally provided on the concrete pile portion 21 can be easily manufactured by utilizing the conventional manufacturing process of the reinforced concrete pile. Further, since the excavation claw portion 28 is located at the corner portion of the excavation blade 26, it is possible to prevent abrasion during excavation at the corner portion of the excavation blade 26, and ensure the excavation ability until the reinforcement pile 16 is buried, It is possible to reliably excavate to a predetermined depth.

(2) The body portion 25 is formed of a steel pipe, and the excavation blade 26 is formed of a steel plate and welded to the body portion 25. Therefore, the pile construction jig 22 can be easily formed, the manufacturability can be improved and the cost can be reduced, and the relatively thick excavation blade 26 can be easily provided, and stable and excellent excavation can be obtained. The construction jig 22 can be easily obtained.

(3) The concrete pile portion 21 is centrifugally molded with concrete to form the reinforcement pile 16 in a state where the reinforcement pile 30 joined to the pile construction jig 22 is covered with the concrete. Therefore, it is possible to easily form the concrete pile portion 21 integrally continuous with the body portion 25 to which the excavation blade 26 is joined by using the conventional manufacturing process of the reinforced concrete pile.

(4) At the end of the concrete pile portion 21 opposite to the steel body portion 25 in the axial direction, the reinforcing steel bar 3 is provided.
The steel seat plate 23 to which 0 is joined is integrally provided so that the end portion of the other body portion 25 can be joined by welding 34c. Therefore, even in the configuration having the body portion 25 in which the excavation blades 26 are joined to the end of the concrete pile portion 21, it is easy to connect the reinforcing piles 16 in the axial direction and bury them in order to bury them in a predetermined depth. In addition, the seat plate 23 constitutes a part of the form at the time of forming the reinforcing pile 16, so that the manufacturing work is facilitated and the manufacturability can be improved.

(5) A plurality of excavation blades 26 are provided in a state of being inclined in the same direction in the circumferential direction of the body portion 25. Therefore, the stress at the time of excavation is distributed to each excavation blade 26, the load on one excavation blade 26 is reduced, and damage can be prevented, and
It is possible to satisfactorily excavate along the vertical direction due to the load being applied substantially uniformly as a whole, and the reinforcing pile 16 can be easily buried to a predetermined depth.

(6) The tip edge of the excavation blade 26 on the side of excavation in the inclined direction is provided so as to project from the outer peripheral surface of the body portion 25 in the circumferential direction without continuing to the outer peripheral surface. The excavation claw portion 28 is provided so as to project in the tangential direction at the corner of the tip edge of the. For this reason, a load is applied along the protruding direction of the excavation claw portion 28 during excavation, and damage such as the excavation claw portion 28 falling off the excavation blade 26 can be prevented, and the excavation claw portion 28 can be prevented during excavation. It will guide you and enable stable drilling. Further, since the excavation blade 26 has a rectangular plate shape and one edge in the direction perpendicular to the tip edge is joined to the body portion 25, at least two corner portions of the tip edge projecting from the body portion 25 of the excavation blade 26 are provided. That is all. As a result, the position of the corner of the tip edge is set to the body portion 2.
Different distances from the central axis of 5. Therefore, the excavation claw portion 28 is in a state of projecting in different directions instead of being parallel to each other, and when the excavation claw portion 28 reaches the hard support ground, the excavation claw portion 28 is properly bitten into the support ground. Therefore, the stable support state of the reinforcing pile 16 can be easily obtained.

(7) A projecting portion 35 is provided on the outer peripheral surface of the concrete pile portion 21 in the vicinity of the end opposite to the body portion 25 in the axial direction. Therefore, for example, the concrete pile part 2
The reinforcement pile 16 can be easily held and rotated by, for example, inserting the end portion on the opposite side of the body portion 25 in the axial direction of 1 to lock the projection portion 35, and the reinforcement pile 16 can be easily embedded and the projection The portion 35 can be used as a reference for the buried state, and the workability of burying the reinforcing pile 16 can be improved.

(8) Reinforcing steel bars 30 are used to reinforce steel projections 35.
It is provided by joining to. Therefore, a strong protrusion 35 that does not break from the concrete pile 21 is obtained, and even if a large load is applied to the protrusion 35 from the pile driving jig 10 during excavation, the protrusion 35 is not damaged and is reinforced reliably. The pile 16 can be suspended and supported and rotated, and the reinforcement pile 16 can be reliably buried in a predetermined depth.

(9) Removable forward / reverse rotatable hydraulic motor 6 attached to the tip of the crane 2 of the crane vehicle 3 and rotatable about a central axis as a rotation axis. The jig 10 is attached, the upper end portion of the reinforcing pile 16 is fitted into the fitting portion 15 having a substantially cylindrical shape of the pile driving jig 10, and the protrusion 35 of the reinforcing pile 16 is fitted into the fitting portion 1.
5 is engaged with the notch 17 provided along the axial direction continuously with the lower edge. Then, by the normal rotation of the hydraulic motor 6, the reinforcement pile 16 is rotated and embedded together with the pile driving jig 10. Further, by the reverse rotation of the hydraulic motor 6, the protrusion 35 of the reinforcing pile 16 is cut out at the upper end of the cut portion 17 along the circumferential direction of the fitting portion 15 at least in the forward rotation direction of the hydraulic motor 6. The reinforcement pile 16 is engaged with the portion 18 and the movement of the reinforcement pile 16 is restricted in the axial direction of the pile driving jig 10, so that the buried reinforcement pile 16 can be pulled out from the ground.

Therefore, the simple structure of the substantially inverted L shape constituted by the notch portion 17 and the engagement portion 18 allows the hydraulic motor 6 to be easily reinforced by the forward and reverse rotations without using a special structure. It is possible to select burying, pulling out, or hanging support of the pile 16. Therefore, the workability can be improved and the work period can be shortened easily. Further, the pile driving jig 10 having the function of pulling out the reinforcing piles 16 can be easily formed, the productivity can be improved, and the piles can be provided at low cost. Also,
The protruding portion 35 used as a reference for burying the reinforcing pile 16 can be used for burying, pulling out, or hanging support of the reinforcing pile, and the configuration can be simplified and the manufacturability can be improved.

(10) The reinforcing pile 16 is buried until the lower surface of the protrusion 35 is located at a position deeper than the freezing depth from GL. For this reason, the concrete foundation 41 is based on the protrusion 35.
Since the concrete foundation 41 integrally formed with the upper end portion of the reinforcing pile 16 included therein is formed above the freezing depth, the concrete foundation 41 moves due to freezing of the ground. Can be prevented,
It is possible to form the concrete foundation 41 with stable characteristics.

(11) Reinforcement pile 16 is provided so as to form a groove-shaped root-cutting groove 42 for laying crushed stones 43 to form concrete foundation 41, for example, so that protrusion 35 is at a predetermined position to GL. After embedding, the ground is excavated and formed in a groove shape in which the upper end portions of the reinforcing piles 16 are connected to each other with the protruding portions 35 exposed. Therefore, for example, the root cutting groove 42 for forming the concrete foundation 41 so as not to be located at a position shallower than the freezing depth is provided with the projection 35 of the reinforcing pile 16.
The root cutting groove 42 can be easily formed without requiring advanced technology.

(12) When the protruding size of the protruding part 35 is set such that the distance between the tips of the protruding parts 35 protruding in the radial direction is equal to or less than the outer diameter size of the fitting part 15 of the pile driving jig 10, The fitting portion 16 was prevented from protruding. Therefore, when the reinforcing pile 16 is buried in a state where the protrusion 35 is located on the ground, the protrusion 35 serving as a reference is protected from the ground by the fitting portion 15 of the pile driving jig 10. The stable reinforcement pile 1 can be secured by burying the reinforcement pile 16 at a predetermined position and ensuring the engagement and disengagement of the protrusion 35 with the engagement means 19.
6 burial work can be done.

(13) Since the concrete foundation 41 for constructing a building must be formed so that each position of the upper end is located on the horizontal plane, the concrete foundation 41 is formed by using the level 31. The buried position of the reinforcing pile 16 is recognized by using the level 31. For this reason, the reinforcing pile 1 can be placed at a predetermined position without using a special device.
6 can be easily buried, and the level 3 used for this burial
Since the concrete foundation 41 is formed with No. 1, workability can be improved.

(14) The reinforcing pile 16 is erected after being erected at a predetermined position for embedding. For this reason,
The reinforcing piles 16 can be sequentially buried, and work efficiency can be improved.

(15) Since the projection 35 is provided in the radial direction, the driving force from the hydraulic motor 6 transmitted through the pile driving jig 10 can act on the reinforcement pile 16 in a substantially even and balanced manner, resulting in eccentricity. It is possible to bury the reinforcing pile 16 substantially vertically without being stabilized.

(16) In the step of burying the reinforcement pile 16 and then providing the root cutting groove 42 to form the concrete foundation 41, for example, the tubular portion 11 of the pile driving jig 10, the fitting portion 15, and the mounting portion 12 are The stepped portion or the easily visible portion such as the bolt 14 attached to the pile driving jig 10 is used as a visual reference to determine the position of the reference protruding portion 35 to recognize the embedding condition. Therefore, the pile driving jig 10
It is possible to easily bury the reinforcing piles 16 and to simplify the configuration of the pile driving jig 10 and to improve the manufacturability, without separately setting a standard.

(17) Check the verticality of the reinforcing pile 16 to be embedded by suspending a weight from the crane 2. For this reason,
With a simple structure, the reinforcement pile 16 can be easily embedded in the vertical direction.

[Second Embodiment] Next, a pile construction jig for a reinforcing pile according to another embodiment of the present invention will be described with reference to FIG.
Will be described with reference to. FIG. 15: is a perspective view which shows the pile construction jig of the reinforcement pile in other embodiment. In the second embodiment, the same components as those in the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

The pile construction jig 60 of the second embodiment shown in FIG. 15 is similar to the pile construction jig 22 of the embodiment shown in FIGS. 1 to 14 and has a reinforcement portion 61 for reinforcing the excavation blade 26. Is provided. That is, the reinforcement portion 61 is provided on the upper surface on the side where the concrete pile portion 21 which is one surface of the excavation blade 26 of the pile construction jig 60 is led out, in a linear rib shape upward along the tangential direction to the outer peripheral surface of the body portion 25. It is provided so as to project toward. The reinforcing portion 61 is formed by integrally attaching, for example, a prismatic steel material by welding or the like. Then, the concrete pile portion 21 is integrally provided on the pile construction jig 60 in the same manner as in the first embodiment to form the reinforcing pile 16.

When constructing the reinforcing pile 16 provided with the pile construction jig 60, the ground is excavated and buried in the same manner as in the first embodiment. At the time of this burying, the reinforcing pile 16 is rotated with a predetermined rotation torque and buried until a load of a predetermined amount or more is applied. As the load above this predetermined level,
For example, when the pile construction jig 60 comes into contact with a relatively hard ground, a rotation torque of a predetermined value or more is required. For example, the rotation torque is 130kN, the reinforcement pile 16
The pushing pressure is 11 kN. In addition, in a state where it is determined that the predetermined load is applied and the reinforcement pile 16 reaches the ground,
The protrusion 35 does not have to be located at a predetermined position as in the first embodiment described above.

After that, the reinforcing piles 16 are unnecessarily struck from the ground surface.
If the upper end of the is protruding, it is removed by cutting the end or the like. Then, the concrete foundation 41 is formed continuously with the upper end portion of the reinforcing pile 16.

According to the reinforcing pile 16 shown in FIG. 15, in addition to the effect of the first embodiment described above, the resistance against the stress acting on the excavation blade 26 at the time of excavation when buried in the ground is improved, Deformation of the excavation blade 26 is prevented, good excavability is obtained, and good embedding work is easily obtained. Moreover,
Since the resistance of the excavation blades 26 is improved, the pile construction jig 60 is made to reach the relatively hard ground to embed the reinforcement piles 16, thereby increasing the supporting force of the building by the excavation blades 26, and the reinforcement piles. 16 functions as a support pile, a good buried state of the pile is obtained, and a structure can be stably supported.

Further, the excavation blade 26 on the side to be buried in the ground
The reinforcing portion 61 is provided on the surface opposite to the surface. For this reason, it is possible to suppress the reinforcement portion 61 from becoming a resistance during excavation when burying in the ground, and at the time of excavation or when the reinforcement pile 16 reaches the hard ground and is buried, the excavation blades 26 are temporarily provided.
Even if the deformation occurs, the reinforcing portion 61 is brought into contact with the body portion 25, the excavation blade 26 can be prevented from being largely deformed, the excavability can be reduced and the supporting force of the building can be suppressed from being reduced, and the excellent burial and Building support is obtained.

Further, since the reinforcing portion 61 has a simple structure in which a prismatic steel material is welded, good embedding and support of a building can be easily obtained with a simple structure, and the productivity can be improved easily.

[Other Embodiments] It should be noted that the present invention is not limited to the above-described one embodiment, and includes other configurations and the like that can achieve the object of the present invention. Included in the present invention.

That is, the reinforcing pile 16 is formed by integrally molding the concrete pile portion 21 on the pile construction jig 22, but a separately formed pile may be joined to the previously formed pile construction jig 22. For example, a concrete pile 50 is formed as a pile as shown in FIGS. 16 and 17. In this concrete pile 50, for example, a square columnar joint portion 51 is formed at the tip in the axial direction. This joint 5
Each surface of 1 is provided with a recess 52 to increase the surface area. Further, a plurality of protrusions 53 are provided on the inner peripheral surface of the body portion 25 of the pile construction jig 22 by welding a reinforcing bar or the like so as to protrude inward. Then, the joint portion 51 of the concrete pile 50 is fitted and inserted into the body portion 25 of the pile construction jig 22, and the connecting means 54 such as concrete is poured between the body portion 25 and the joint portion 51 to be hardened, and the concrete pile 50 and the pile construction jig 22 are integrally joined.

With the configuration shown in FIGS. 16 and 17, the reinforcing pile 16 in which the pile construction jig 22 is firmly and integrally joined to the concrete pile 50 can be easily formed, and the concrete pile 50 can be buried even when it is buried. The concrete pile 50 can be reliably buried in a predetermined depth without removing the pile construction jig 22 from the inside. Further, since the concave portion 52 is provided in the joint portion 51, even when the reinforcement pile 16 is pulled out, the concrete pile 5
It is also possible to prevent the pile construction jig 22 from dropping from 0.

In this structure, not only the concrete pile 50 but also a steel pipe or the like can be used. For example, a steel pipe is welded to the body portion 25 of the pile construction jig to be integrally connected, or the body portion 25 is made into a pile as a series, that is, the excavation blade 26 and the excavation claw portion 28 are provided at the tip of the steel pipe. It may be provided. In addition, according to the configuration in which the excavation blade 26 is directly provided on the steel pipe, the manufacturability can be improved. Furthermore, the concrete pile 50 is not limited to the one formed by centrifugal force, but may be formed by vibration. By using the concrete pile 50, it is possible to easily form the reinforcing pile 16 with different diameters of the pile portion.

Further, the connecting means 54 for connecting the pile construction jig 22 and the pile is not limited to concrete, but may be welded, hard plastic or the like. In addition, at least a portion of the body portion 25 into which the joint portion 51 of the concrete pile 50 is inserted is formed into a similar prismatic shape, or after the joint portion 51 is inserted and pressed, the body portion 25 is pressed so as to be crushed and joined. It may be deformed to be along the outer surface of the portion 51 and integrally connected.

As the reinforcing pile 16, the pile construction jig 22 is attached to one end in the axial direction, but the reinforcing pile 16 may be provided at the intermediate portion of the concrete pile portion 21, for example. According to this structure, even if the frictional force received from the ground increases with the reinforcing pile 16 buried to some extent, the pile construction jig 22 in the middle portion
The excavation blade 26 of the above-mentioned works to cut into the ground, can assist the burying, and can satisfactorily bury the reinforcing pile 16.

Although the pair of excavation blades 26 are described, it is possible to provide only one or a plurality of three or more blades. In the case of providing a plurality of holes, it is preferable that they are provided at substantially equal intervals in the circumferential direction of the body portion 25 so that the load can be applied evenly during excavation and stable excavation can be performed.

The excavation claw portion 28 is provided at least at the corner portion of the excavation blade 26, but it may be provided at the entire region of the tip edge of the excavation blade 26. According to this configuration, the excavation claw portion 2
The work of attaching 8 is easy and the manufacturability can be improved, and the excavation claw portion 28 is less likely to be worn, so that excavation can be performed well. By providing a plurality of excavating claws 28 in a comb shape, the excavating claws 28 easily bite into the ground to allow good excavation, and the excavating claws 28 are easily guided during excavation.
Can drill stably.

Further, the excavation claw portion 28 is provided so as to project tangentially at the corner of the excavation blade 26.
It may be provided in a state of protruding along the direction in which the tip edge of the.

Although the pile construction jig 22 is made of steel, it may be made of ceramics, for example.

In addition, the concrete pile portion 21 has a protrusion 35.
However, any structure that prevents the protrusions 35 from rotating during embedding, such as the corners when the base end side that is the upper end of the concrete pile part 21 is formed into a prismatic shape, is provided. May be Furthermore, the protrusion 35 is not limited to steel.

On the other hand, although the fitting portion 15 is provided with the engaging means 19 having a substantially inverted L shape, for example, at least the reinforcing pile 16 having a reverse T shape in which the engaging portion 18 is provided in contrast is pulled out. Any shape that allows the protrusions to be engaged can be used.

Then, from the lower surface of the protrusion 35, the reinforcement pile 16
About 17 cm to the upper end of the, the upper end of the reinforcement pile 16 is GL
To the depth of about 22 cm, the crushed stone 43 has a thickness of 12 cm, the base 45 has a thickness of 15 cm, and the cloth base 46 has a height of 57 cm from the base 45. It is appropriately set depending on the soil softness, freezing depth, and the like. In addition, when burying the reinforcing pile 16 in the first embodiment, it may be buried until reaching the ground, as in the second embodiment. In this case, the protrusion 3
Since it is not necessary to visually check 5 for checking the buried position, workability can be improved and it can function as a support pile. The embedding operation of the second embodiment may be the first embodiment, and the embedding method is not limited to the first embodiment and the second embodiment, and is suitable. Either method can be used.

Further, the concrete foundation 41 is not limited to the inverted T-shaped cross section, but may be one having a L-shaped cross section in which the cloth foundation 46 is displaced to one side with respect to the base 45.

Although the root cutting groove 42 is laid with the crushed stones 43 in the description, at least the periphery of the reinforcing pile 16 is excavated, and at least the reinforcing pile 16 is provided in the recess of the excavated ground.
It is also possible to place crushed stones 43 around the area. In addition, in the case of this structure, the concrete foundation 41 formed is an independent foundation formed for each reinforcing pile 16 unlike the above-described embodiment in which a plurality of reinforcing piles 16 are integrally connected. . According to this configuration, the amount of excavation is reduced, the construction period can be easily shortened, surplus earth and sand are reduced, and the environment can be protected. Furthermore, the amount of crushed stones 43 used can be reduced and the cost can be reduced.

Furthermore, the root cutting groove 42 may be provided to provide the concrete foundation 41 after the reinforcement pile 16 is buried, or the root cutting groove 42 may not be provided depending on the form of the foundation. Alternatively, the building may be directly connected to the reinforcing pile 16 without providing the concrete foundation 41 or the like.

Then, the buried amount of the reinforcing pile 16 was determined by using the level 31, but, for example, when the GL is substantially horizontal,
It is also possible to determine the completion of the embedding of the reinforcing pile 16 by checking the visual reference at a predetermined distance from the reference protruding portion 35 by visual measurement without using the level 31. Even if some error occurs due to visual measurement, the upper end of the reinforcement pile 16 is not
Since it is included in 1, the error can be absorbed by the inclusion in the concrete foundation 41.

Although the hydraulic motor 6 capable of rotating in the forward and reverse directions is used as the driving means, the electric motor driven by the electric power from the storage battery of the crane vehicle 3 or the electric power from the separate generator, or the fuel supplied by the fuel is supplied. Any of an engine type having an internal combustion engine and a type using exhaust gas from the engine of the crane vehicle 3 can be used. Further, the structure is not limited to the one capable of rotating in the forward and reverse directions, but may be configured to rotate only in one direction. In this case, for example, the pile driving jig 10
For example, a gear or the like may be provided and the pile driving jig 10 may be appropriately inverted by a switch operation or the like. Further, the driving means is not limited to the one that is rotationally driven, and the reinforcing pile 16 may be embedded by vibration or impact.

Further, the pile driving jig 10 is not limited to the structure in which the mounting portion 12 and the fitting portion 15 are coaxially provided on the cylindrical portion 11, but as described above, for example, vibration or impact is applied to the reinforcing pile 16. Any structure, such as a structure, in which the driving force of the driving means is applied to the burying of the reinforcing pile 16 is possible.

Then, the rooting groove 42 is formed after the reinforcement pile 16 is buried, and the concrete foundation 41 is formed after the crushed stones 43 are spread. However, it is integrated with the reinforcement pile 16 buried by any other method. Concrete foundation 4
It is also possible to form 1.

For example, the reinforcement pile 16 may be embedded after the root cutting groove 42 is formed. According to this configuration, it is sufficient to embed the reinforcement pile 16 until the protrusion 35 of the reinforcement pile 16 is located at the bottom of the root cutting groove 42. The embedding work can be performed by visually observing the protrusion 35 directly. Can be easily embedded without using a special device and without providing a visual reference to the pile driving jig 10.

Further, for example, after excavating the ground in a range wider than the site area of the building to a position deeper than the freezing depth, the reinforcement pile 16 is buried in a state where at least the upper end side of the reinforcement pile 16 is exposed from the lower surface of the projection 35. And the reinforcement pile 16
Of the concrete foundation 41 with the crushed stones 43 laid on the ground excavated in a state where the upper end of the
The concrete foundation 41 is formed in a state in which the upper end of is located above the GL. After this, the earth is excavated to the GL position.

According to this structure, for example, the protrusion 35 can be easily buried by direct visual observation until it reaches a predetermined position, and the pile driving jig 1 can be used without using a special device.
It is possible to easily form the concrete foundation 41 at a predetermined position even on soft ground without providing a visual reference at 0. Therefore, the workability can be improved and the work period can be shortened easily.

Further, although the reinforcing pile 16 was erected from the ground in advance, the reinforcing pile 16 was attached to the pile driving jig 10 attached to the crane 2, that is, to the engaging portion 18 of the pile driving jig 10. The protrusions 35 are engaged, and the crane 2 is operated to suspend and support the reinforcing piles 16.
Is moved to a place where the burial is carried out, and the tip end which is the lower end of the reinforcing pile 16 is brought into contact with the ground. Then, while driving the hydraulic motor 6 to rotate the reinforcing pile 16, the crane 2 is operated to move the reinforcing pile 16 downward so as to be embedded.

According to this structure, the reinforcing pile 16 is previously prepared.
The work to stand up is unnecessary, and the reinforcing pile 16 can be buried efficiently.

The protrusions 35 are not limited to the quadrangular prism shape, and may have any shape such as a cylindrical shape, an elliptic cylinder shape, and a cylindrical shape. Further, it is not limited to the configuration in which one pair is provided in the radial direction, and for example, a plurality may be provided radially or only one may be provided.

Further, although the buried state is recognized using the level 31, it can be confirmed visually without using a separate device or by using another device as described above.

[0143]

EXAMPLES Next, the results of experiments on the characteristics of the reinforcing piles 16 of the above respective embodiments will be described. As the experiment, an experiment on the strength of the excavation blade 26 and an experiment on the burial state of the reinforcing pile 16 were performed.

(Strength of excavation blade) First, the results of experiments on the strength of the excavation blade 26 will be described. As the test bodies used in the experiment, a sample 1 corresponding to the pile construction jig 22 and a sample 2 corresponding to the pile construction jig 60 were used. Sample 1 is an excavation blade 26 in which a body portion 25 having a wall thickness of 5 mm and an outer shape of 100 mm is provided, and an excavation claw portion 28 is provided at a corner portion with a thickness of 5 mm.
It is formed by welding. Sample 2 is 1 in Sample 1
A reinforcing member 61 is provided by welding a square steel member having a side of about 2 cm.

As a test method, a tea barrel-shaped jig was placed on the welded excavation blade 26 of the test body in the Soka test room of the Building Materials Testing Center, and a shear load was applied to the excavation blade 26 using a 3000 kN compression tester. Then, the maximum load and the breaking condition were investigated.

As a result, in both Sample 1 and Sample 2, the excavation blade 26 was not broken and the body portion 25 was buckled and deformed.
And the maximum load of the sample 1 was 547 kN and the maximum load of the sample 2 was kN. Then, in the sample 2, the reinforcement portion 61 is in a state of being pressed by the body portion 25, and the excavation blade 26 hardly bends further from that state,
The buckling deformation condition was smaller than that of Sample 1. Thus, when the reinforcement pile 16 is buried, the excavation blade 26 having a simple plate-like structure can be excavated without deformation, and the reinforcement pile 16 is abutted by the pile construction jig 22 at the tip to the hard support base. At this time, it is understood that the excavation blade 26 is not deformed by the weight of the reinforcing piles 16 or the like and is surely bited into the support base, which enables stable support of the building. In particular, it is understood that the excavability and the supportability on the ground can be improved by providing the reinforcing portion 61 of the sample 2.

(Buried Condition of Reinforcing Pile) Next, the result of an experiment on the buried condition of the reinforcing pile will be described with reference to the drawings. FIG. 18: is explanatory drawing which shows the result of the Swedish-type sounding test in the place where the reinforcement pile was buried. FIG. 19 is a perspective view showing an experimental situation in which a pressure is applied to a buried reinforcing pile. In addition, as the test body used for the experiment, the reinforcement pile 16 provided with the pile construction jig 60 was used. As a comparative sample, a blade pile manufactured and sold by Craftman Co., Ltd. (with a steel pipe outer diameter of 165.2 m
m) was used.

As the burying work, the rotation torque is 130 k.
N and the indentation pressure were set to 90 kN, respectively, and they were embedded.
The buried ground is a place where the result of FIG. 18 is shown by a Swedish sounding test based on JIS-A-1221. Moreover, it was confirmed whether or not the buried pile did not sink by applying pressure to the buried reinforcement pile in the burying direction. In addition, as a confirmation method of this sinking, as shown in FIG. 19, four reinforcing piles 16 are buried around the buried pile 70, and H steel 71 is welded to each of these four reinforcing piles 16. The holding portion 72 is assembled and formed in a turret shape, and the hydraulic jack 75 is interposed between the holding portion 72 and the embedded sample 70,
The hydraulic jack 75 exerted a pressure in a direction in which the sample 70 was separated from the restraining portion 72, that is, a pushing pressure, and sedimentation was confirmed.

As a result, in the comparative sample, it was impossible to bury due to idle rotation at the burial depth of 2.5 m. on the other hand,
The reinforcing pile 16 provided with the pile construction jig 60 of the present example could be buried up to the position where the buried depth dimension was 3.3 m. And
Comparing with the results of FIG. 18, it was confirmed that the sample of this example reached the ground surely.

When a pushing pressure was applied to the comparative sample, sedimentation was observed at a pushing pressure of 30 kN. On the other hand, in the sample of this example, no sedimentation was observed even at a pushing pressure of 90 kN. From these facts, it is understood that the sample of this example is well buried up to the ground and a large supporting force can be obtained.

[0151]

According to the present invention, a plate-shaped excavating blade is provided on the outer peripheral surface of a substantially cylindrical body portion which is continuously provided substantially coaxially with a pile to be buried in the ground, and a plane of which is a shaft of the body portion. Joined integrally in an inclined state intersecting with the direction, and at the same time, at least at the corners of the excavation blade, the excavation claws are protruded in the circumferential direction of the corner around the center axis of the body. To provide
For example, with a simple structure that can easily excavate well even if there are tree roots and gravel in the ground, it is easy to install a relatively thick excavation blade, which can improve manufacturability and reduce cost and construct piles It can be easily buried up to a predetermined depth where stable support can be obtained.

[Brief description of drawings]

FIG. 1 is an explanatory diagram illustrating an operation of burying a reinforcing pile by a pile driving device for forming a concrete foundation according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a situation in which the same pile is buried.

FIG. 3 is a perspective view showing the same pile driving jig.

FIG. 4 is a side view showing the positional relationship of the protrusions when the reinforcing pile is buried in the same.

FIG. 5 is a side view showing the positional relationship of the protrusions when the reinforcing pile is pulled out.

FIG. 6 is a sectional view showing the same reinforcing pile.

FIG. 7 is a perspective view showing a connecting portion of the reinforcing pile.

[Fig. 8] Fig. 8 is an explanatory diagram for explaining the excavation situation of the reinforcing pile by the pile construction jig.

FIG. 9 is a perspective view showing the above pile construction jig.

FIG. 10 is a plan view illustrating an arrangement state of excavation claw portions of the above pile construction jig.

FIG. 11 is a cross-sectional view illustrating a state in which a concrete foundation is formed by forming a cloth foundation in the above-described concrete foundation forming configuration.

FIG. 12 is a cross-sectional view illustrating a state in which a root cutting groove is formed after burying a reinforcing pile in the step of forming a concrete foundation.

FIG. 13 is a cross-sectional view illustrating a state in which crushed stones are spread in the step of forming a concrete foundation.

FIG. 14 is a cross-sectional view illustrating a state in which a base is formed in the same step of forming a concrete foundation.

FIG. 15 is a perspective view showing a pile construction jig for a reinforcing pile according to another embodiment of the present invention.

FIG. 16 is a partially cutaway perspective view showing a reinforcing pile according to another embodiment of the present invention.

FIG. 17 is a partially cutaway side view showing the same reinforcing pile.

FIG. 18 is an explanatory diagram showing the results of a Swedish sounding test in a place where a reinforcing pile according to the present invention is buried.

FIG. 19 is a perspective view showing an experimental situation in which pushing pressure is applied after the reinforcing pile according to the present invention is buried.

[Explanation of symbols]

16 Reinforcement pile 21 Concrete pile part which is pile 22,60 pile construction jig 23 seat plate 25 torso 26 excavation wings 28 Excavation claw 30 Reinforcing rebar 35 Protrusion 50 concrete piles 54 connecting means 61 Reinforcement part

Claims (18)

[Claims] 1. A pile construction jig for burying a pile, which is connected to a building constructed on the ground and supports the building, in the ground, wherein the pile is continuously provided substantially coaxially. A substantially cylindrical body portion, a plate-shaped excavation blade integrally joined to the outer peripheral surface of the body portion in a state in which a plane intersects the axial direction of the body portion at an angle. A pile construction jig, comprising: an excavation claw portion provided at least at a corner portion of the blade so as to project in a circumferential direction of the corner portion around a central axis of the body portion. 2. The pile construction jig according to claim 1, wherein a plurality of excavation blades are joined in a state of being inclined in the same direction in the circumferential direction of the body portion. 3. The pile construction jig according to claim 1 or 2, wherein the excavation blade is joined such that a tip edge in a slanting direction projects circumferentially from an outer peripheral surface of the body portion, and the excavation claw portion is formed. A pile construction jig, which is provided so as to project in a tangential direction at a corner of the tip edge of the excavation blade. 4. The pile construction jig according to any one of claims 1 to 3, wherein the body portion is formed of a steel pipe, and the excavation blade is formed of a steel plate and joined to the body portion by welding. A pile construction jig characterized by this. 5. The pile construction jig according to claim 1, further comprising a reinforcing portion provided on at least one plane of the excavation blade along a tangential direction to an outer peripheral surface of the body portion. A characteristic pile construction jig. 6. The pile construction jig according to claim 5, wherein the reinforcing portion is provided on a surface opposite to a surface of the excavation blade on the side where the pile is buried in the ground. Pile construction jig. 7. The pile construction jig according to any one of claims 1 to 6, a pile connected to a body portion of the pile construction jig, and a connecting means for connecting the body portion and the pile. Reinforcement pile characterized by having. 8. The reinforcing pile according to claim 7, wherein the pile is formed of concrete and is fitted and inserted into a body portion of a pile construction jig, and the connecting means is filled between the body portion and the pile to join them. Reinforcement pile characterized by being concrete. 9. The reinforcement pile according to claim 8, wherein at least a portion of the pile fitted into the body portion is formed in a prismatic shape, and the body portion has a protrusion protruding inward on an inner peripheral surface. Reinforcement pile characterized by having parts. 10. A reinforcing pile which is embedded in the ground and is connected to a building constructed on the ground to support the building, comprising a substantially cylindrical body portion and a flat surface on an outer peripheral surface of the body portion. A plate-shaped excavating blade integrally joined in an obliquely inclined state intersecting the axial direction of the body portion, an excavating claw portion provided at a corner portion of the excavating blade, and the inside of the body portion A plurality of reinforcing rebars having one end in the longitudinal direction joined to the peripheral surface in a state where the longitudinal direction is along the axial direction of the body part, and a substantially cylindrical shape that is continuous with the body part by concrete by covering the reinforcing rebars and integrally. Reinforcement pile characterized by comprising a pile formed into a shape. 11. The reinforcement pile according to claim 10, The pile is a reinforced pile characterized by being formed by centrifugal force. 12. The reinforcing pile according to claim 10 or 11, wherein the body is made of steel, and a reinforcing bar is joined to an end of the pile opposite to the body in the axial direction, and the body is integrally provided. A reinforcing pile characterized by comprising a steel seat plate to which the ends of other body parts can be joined by welding. 13. The reinforcement pile according to claim 10, wherein a plurality of excavation blades are joined while being inclined in the same direction in the circumferential direction of the body portion. 14. The reinforcement pile according to claim 10, wherein the excavation blade is joined such that a tip edge in a slanting direction projects in a circumferential direction from an outer peripheral surface of the body portion. Is a reinforcing pile that is provided in a state of protruding in a tangential direction at a corner of the tip edge of the excavation blade. 15. The reinforcing pile according to claim 10, further comprising a protruding portion provided on an outer peripheral surface near an end portion of the pile opposite to the body portion in the axial direction. And reinforced piles. 16. The reinforcement pile according to claim 10, further comprising a reinforcement portion provided on at least one plane of the excavation blade along a tangential direction to an outer peripheral surface of the body portion. Reinforced pile. 17. The reinforcing pile according to claim 16, wherein the reinforcing portion is provided on a surface opposite to a surface of the excavation blade on the side where the pile is buried in the ground. Pile. 18. The reinforcement pile according to claim 7, wherein the reinforcement pile is in a state where its axial direction is substantially vertical and the side on which the body portion of the reinforcement pile is provided is the lower end side. In this state, the retained reinforcement pile is rotated by rotating the reinforcement pile in a direction in which the surface of the excavation wing on the side where the pile is led out of the body portion of the reinforcement pile is inclined in the circumferential direction of the body portion. A pile construction method characterized by burying from a surface to a predetermined depth position.