JP2003027468A - Edge member for steel pipe pile and the steel pipe pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel pipe pile which can be efficiently transported, can be manufactured in a small-scale facility and can lessen the occupied area of a storage place in the steel pipe pile, having a spiral blade on the outer periphery of an edge part. SOLUTION: An edge member 1 for the steel pipe pile comprises an edge member body 5, having substantially the same outside diameter d1 as a steel pipe 3 in the edge member constituting the steel pipe pile by being coupled to an edge part 4 of the steel pipe 3, the spiral blade 7 fixed on an outer periphery 6 of the edge member body 5 and d fitting part 11 formed to be projected on an upper part 8 of the edge member body 5, having an outside diameter d2 fitted to an inner periphery 9 of the edge part 4 of the steel pipe 3 and forming a through-hole 10 in the base line direction. The steel pipe pile forms the through-hole 16, at a position corresponding to the through hole 10 of the edge member 1 for the steel pipe pile in the edge part of a steel pipe; and after the fitting part 11 is fitted to and inserted in the inner periphery 9 of the edge part 4 of the steel pipe 3 so that the through-hole 16 and the through-hole 10 of the edge member 1 for the steel pipe pile correspond to each other, a fixture 17 is formed to be inserted in and coupled to each through-hole 10, 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe pile that is buried in the ground and supports a foundation of a building, and a steel pipe pile that can be efficiently loaded on a truck bed or the like during transportation, and such a steel pipe pile. The present invention relates to a steel pipe pile tip member that constitutes a simple steel pipe pile.

[0002]

2. Description of the Related Art As a pile for supporting a foundation of a building, as shown in FIG. 9, a steel pipe pile 10 having spiral blades 103 fixed to an outer periphery 102 of a tip end portion 101 of a steel pipe 100.
4 is conventionally known. Such steel pipe pile 104
Is to be buried in the ground by rotating and screwing it with a driving machine 200 such as an earth auger (see FIG. 8) installed on the ground, and it can be buried without soil, and after being buried, Since the projection area in the horizontal direction is widened by having the spiral blade 103, there is an advantage that a large supporting force can be obtained.

[0003]

However, the spiral blade 103 of such a conventional steel pipe pile 104 generally has an outer diameter d6 of about 2 to 3 times the outer diameter d3 of the steel pipe 100. Therefore, there is a problem that the steel pipe piles 104 cannot be bundled in parallel in the factory and cannot be efficiently loaded on a truck bed or the like.

Further, the steel pipe 10 of such a steel pipe pile 104 is also provided.
Since 0 generally has a length of about 10 to 15 m, in order to attach the spiral blade 103 to the tip end portion 101 of the steel pipe 100 having such a long length when manufactured in a factory, However, a large space including a large facility and a storage place is required, which is very inefficient and leads to an increase in manufacturing cost.

The present invention has been made in view of the above problems, and makes it possible to efficiently transport a steel pipe pile having a spiral blade on the outer periphery of the tip portion and to use a small-scale facility. It is an object of the present invention to provide a steel pipe pile that can be manufactured and can reduce the area occupied by a storage place.

[0006]

The steel pipe pile tip member according to claim 1 of the present invention, which has been made to achieve the above object, constitutes a steel pipe pile by being joined to a tip portion of a steel pipe. The tip member is a cylindrical or columnar tip member body having an outer diameter substantially the same as that of the steel pipe, a spiral blade fixed to the outer periphery of the tip member body, and protruding above the tip member body. A cylindrical or columnar fitting portion having an outer diameter formed to fit the inner circumference of the tip of the steel pipe and having an insertion hole formed in the generatrix direction thereof. Is.

A steel pipe pile according to a second aspect of the present invention is a steel pipe pile configured by connecting the tip member of the steel pipe pile according to the first aspect to a tip end portion of the steel pipe, wherein the steel pipe pile at the tip end portion of the steel pipe. An insertion hole is formed at a position corresponding to the insertion hole of the steel pipe tip member, and the fitting portion is fitted into the inner periphery of the steel pipe tip portion so that the insertion hole and the steel pipe pile tip member insertion hole correspond to each other. After that, the fastener is inserted through each of the insertion holes and coupled.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a steel pipe pile tip member 1 and a steel pipe pile 2 according to the present invention will be described with reference to the drawings. The tip member 1 for steel pipe piles according to the embodiment of the present invention,
As shown in FIGS. 1 and 2, a tip member that constitutes a steel pipe pile 2 (see FIG. @) By being coupled to a tip portion 4 of a steel pipe 3, and has an outer diameter d1 that is substantially the same as that of the steel pipe 3. A cylindrical or columnar tip member body 5 having a spiral blade, a spiral blade 7 fixed to an outer periphery 6 of the tip member body 5, and a tip 8 of the steel pipe 3 formed so as to project from an upper portion 8 of the tip member body 5. It has an outer diameter d2 fitted to the inner circumference 9 of the portion 4 and a cylindrical or columnar fitting portion 11 having an insertion hole 10 formed in the generatrix direction thereof. The details will be described below.

As shown in FIG. 1, the tip member main body 5 is a main body portion for constructing the steel pipe pile tip member 1, and the steel pipe 3 to which the steel pipe pile tip member 1 is connected. The outer diameter d3 is substantially the same as the outer diameter d1. By forming the tip member body 5 in this way, when the tip member 1 for a steel pipe pile is attached to the tip portion 4 of the steel pipe 3, a step may occur at the joint between the tip member body 5 and the steel pipe 3. Instead, it can have the same shape as the conventional steel pipe pile 104 formed by one steel pipe 100 (see FIG. 9).

The lower end 12 of the tip member body 5 is provided with a disk-shaped lid 13 that closes the opening. This lid 13
By providing the steel pipe pile 2, when the steel pipe pile 2 is screwed into the ground, it is possible to prevent soil and sand from entering the inside from the lower end of the tip member body 5. In addition, the tip member body 5 is attached to the lower end 1
Instead of the cylindrical member provided with the lid 13 on 2, it is also possible to make the cavity have a cylindrical shape inside thereof.

As shown in FIG. 1, the spiral blade 7 is a blade fixed to the outer periphery 6 of the tip member body 5 to form a spiral surface. The spiral blade 7 is screwed into the ground by the rotating force of the steel pipe pile 2 when the steel pipe pile 2 configured by joining the steel pipe pile tip member 1 to the tip portion 4 of the steel pipe 3 is buried, It plays a role of propelling the pile 2 downward (see FIG. 8). The spiral blade 7 is formed by forming a flat plate member having a constant thickness into a spiral shape having a substantially constant width and fixing the flat plate member to the outer periphery 6 of the tip member body 5.

In the present embodiment, the spiral blade 7
2, as shown in FIG.
In FIG. 3, the horizontal projection width is gradually narrowed. However, as shown in FIG. 3, the horizontal projection width is constant at the upper end portion 14 and the lower end portion 15. It is also possible to form. Further, the spiral blade 7 has a configuration in which one blade is wound once, but the number of the spiral blade 7 can be plural.
The number of turns may be two or more. Further, the fixing of the spiral blade 7 to the outer circumference 6 of the steel pipe pile tip member 1 is usually performed by welding, but it may be fixed by another method.

As shown in FIG. 1, the fitting portion 11 is used to connect the steel pipe pile tip member 1 to the tip portion 4 of the steel pipe 3.
An outer diameter d2 that is a portion that is fitted into the inner circumference 9 of the tip portion 4 of the steel pipe 3, is formed so as to project from the upper portion 8 of the tip member body 5, and that fits into the inner circumference 9 of the tip portion 4 of the steel pipe 3. It is composed of a cylindrical member having. Here, the tip portion 4 of the steel pipe 3
The outer diameter d2 fitted to the inner circumference 9 is the same as or slightly smaller than the inner diameter d4 of the tip portion 4 of the steel pipe 3.

Further, in this embodiment, the fitting portion 11
As shown in FIG. 4, a cylindrical member having an outer diameter 2 which is substantially the same as the inner diameter d4 of the tip member body 5 is formed by being fixed to the tip member body 5 by welding or the like while protruding.

As shown in FIGS. 4 and 5, which are sectional views taken along the line AA of FIG. 1, the insertion hole 10 is formed when the steel pipe pile tip member 1 is joined to the tip portion 4 of the steel pipe 3. A circular hole formed in the fitting portion 11 in the generatrix direction, which is a portion provided to fix the tip member 1 for rotation to the steel pipe 3 in the rotation direction. In the present embodiment, a total of two insertion holes 1 are provided at positions where the fitting portion 11 is divided into two in the circumferential direction.
0 is formed.

The diameter of the insertion hole 10 is not particularly limited, but is preferably about 10 to 20 mm in consideration of the outer diameter d3 of the steel tube 3, that is, an ordinary bolt or the like can be easily inserted. Is.

Further, such an insertion hole 10 is easily formed by drilling with an electric drill or the like for cutting gold so as to pass through the central axis of the fitting portion 11 so as to be orthogonal to the axial direction. can do. Therefore, it is possible to form the insertion hole 10 in advance even in a factory or the like.
It is possible to form the insertion hole 10 by a simple operation even at a construction site.

Here, the length of the cylindrical member forming the fitting portion 11 and the length of fitting the cylindrical member into the tip member body 5 are not particularly limited, but the upper portion 8 of the tip member body 5 is not limited.
It is necessary to secure a sufficient length of the fitting portion 11 projecting to the front and also secure a sufficient bonding strength between the fitting portion 11 and the tip member main body 5. Therefore, for example, the fitting portion 11
The length of the cylindrical member that constitutes the outer diameter d3 of the steel pipe 3 is
It is preferable that the length is about 1/2 to 2 times, and the length of the tip member body 5 to be fitted is about 1/4 to 1/2 of the length of the cylindrical member forming the fitting portion 11. Is.

Although not shown, in order to allow the fitting portion 11 to be easily fitted into the inner circumference 9 of the tip portion 4 of the steel pipe 3, the shape of the fitting portion 11 is outwardly directed upward. It is more preferable to form it by inclining it so that the diameter becomes gradually smaller.

By providing the fitting portion 11 as described above, the tip member 1 for a steel pipe pile can be easily coupled to the steel pipe 3 only by fitting the fitting portion 11 into the tip portion 4 of the steel pipe 3. At the same time, it is possible to prevent the steel pipe pile tip member 1 from being displaced in a direction perpendicular to the axis of the steel pipe 3 in a state where they are connected. The shape of the fitting portion 11 may be a columnar shape having no cavity therein, as in the tip member body 5.

The steel pipe 3 is a main body portion which constitutes the steel pipe pile 2 by joining the steel pipe pile tip member 1 to the tip portion 4 thereof, and is constituted by a tubular member having a predetermined length. As the steel pipe 3, the same material and structure as those used in the conventional steel pipe pile 104 (see FIG. 9) can be used. The length of the steel pipe 3 is also set to about 10 to 15 m like the general steel pipe pile 104.

As shown in FIGS. 1 and 6 which is a sectional view taken along the line BB of FIG. 1, two pieces are provided in the tip portion 4 of the steel pipe 3 at positions corresponding to the insertion holes 10 of the fitting portion 11. Through hole 16 is formed. That is, as described above, since the insertion hole 10 of the fitting portion 11 is formed at a position where the fitting portion 11 is divided into two in the circumferential direction, the tip portion 4 of the steel pipe 3 is correspondingly formed.
It is easily formed by piercing two insertion holes 16 at positions bisected in the circumferential direction so as to pass through the central axis of the fitting portion 11 and penetrate perpendicularly to the axial direction. This insertion hole 16
Has a diameter that matches the insertion hole 10 of the fitting portion 11 when the fitting portion 11 of the steel pipe pile tip member 1 is fitted into the tip portion 4 of the steel pipe 3, and specifically, the fitting portion 11 through holes 1
The size is the same as or slightly larger than 0.

Like the insertion hole 10 of the fitting portion 11, such an insertion hole 16 can be easily formed by piercing with an electric drill or the like for cutting metal. Therefore, it is possible to form the insertion hole 16 in advance even in a factory or the like, but it is possible to form the insertion hole 16 by a simple operation even at a construction site.

Then, as shown in FIG. 7, a steel pipe pile 2 is constructed by connecting the steel pipe pile tip member 1 to the tip portion 4 of such a steel pipe 3. The connection between the steel pipe 3 and the steel pipe pile tip member 1 is made such that the insertion hole 16 of the steel pipe 3 and the insertion hole 10 of the steel pipe pile tip member 1 correspond to each other, and the fitting portion of the steel pipe pile tip member 1 is connected. After fitting 11 into the inner circumference 9 of the tip portion 4 of the steel pipe 3, the fastener 17 is formed so as to penetrate the joint portion between the steel pipe pile tip member 1 and the steel pipe 3 in a direction orthogonal to the axial direction of the steel pipe 3. , Insertion hole 16 of steel pipe 3 and tip member 1 for steel pipe pile
It is performed by inserting it into the insertion hole 10 of. The fastener 17 includes the insertion hole 16 of the steel pipe 3 and the steel pipe pile tip member 1.
It is a member provided to prevent the connection from being easily disengaged by being inserted into the insertion hole 10 and attached to the steel pipe 3.

As shown in FIGS. 1 and 7, the fasteners 17 are mounted on the steel pipe 3 when the steel pipe pile tip member 1 is connected to the tip portion 4 of the steel pipe 3. Is a member that is inserted into the insertion hole 16 of the steel pipe 3 and the insertion hole 10 of the tip member 1 for a steel pipe pile for fixing in the rotation direction, and is configured by a pin-shaped member made of steel.

The shape of the fastener 17 is such that the head portion 18 has a hemispherical shape having a size larger than the diameter of the insertion hole 16 of the steel pipe 3, and the shaft portion 19 has a diameter of the insertion hole of the steel pipe pile tip member 1. It is a pin-shaped member having a size substantially equal to or smaller than the diameter of 10. A locking piece 21 for inserting the fastener 17 into the steel pipe 3 is provided at the tip 20 of the shaft portion 21.
Is rotatably joined so as to be orthogonal to the axial direction.

The shape of the locking piece 21 is not particularly limited, but in the present embodiment, the length from the tip 20 of the fastener 17 to about twice the diameter of the insertion hole 16 of the steel pipe 3 is set in the axial direction. It is divided into two parts, cut, and again joined rotatably to the tip 20 with a pin or the like. Further, the length of the shaft portion 21 is set such that the length up to the locking piece 21 is substantially the same as or larger than the outer diameter d3 of the steel pipe 3. In order to efficiently transport the steel pipe pile 2, such joining of the steel pipe 3 and the steel pipe pile tip member 1 is usually performed at a construction site.

Further, the structure of the fastener 17 is not limited to the one in which the rotatable locking piece 20 is formed on the tip end portion 19 as described above, but may be a split pin or the like, and the shaft of the steel pipe 3 may be used. Other configurations may be adopted as long as they can penetrate the joint portion between the steel pipe pile tip member 1 and the steel pipe 3 at right angles to the direction and can be attached to the outer periphery 6 of the steel pipe 3.

As shown in FIG. 8, the steel pipe pile 2 thus constructed is vertically hung by a driving machine 200 such as an earth auger with the steel pipe pile tip member 1 facing downward and then rotated. While being screwed into the ground.

At this time, even if the steel pipe pile 2 is suspended vertically from the drive machine 200, the fastener 17 is attached to the joint portion between the steel pipe pile 2 and the steel pipe pile tip member 1. The steel pipe 3 and the tip member 1 for the steel pipe pile rotate as one body without being separated from each other and against the rotational force around the axis that acts when the steel pipe pile 2 is screwed into the ground.

Therefore, the steel pipe pile 2 can be used in exactly the same manner as the conventional steel pipe pile 104 (see FIG. 9).

[0032]

As described above, the tip member for a steel pipe pile according to the present invention is a tip member that constitutes a steel pipe pile by being joined to the tip portion of the steel pipe, and is substantially the same as the steel pipe. A cylindrical or cylindrical tip member body having an outer diameter, and a spiral blade fixed to the outer periphery of the tip member body,
A cylindrical or columnar fitting portion that is formed so as to project above the tip member main body, has an outer diameter that fits inside the tip portion of the steel pipe, and has an insertion hole formed in the generatrix direction thereof. And, since the portion of the tip of the steel pipe pile provided with the spiral blade is separately configured as a steel pipe pile tip member,
There is an advantage that the tip member for the steel pipe pile and the steel pipe can be separately conveyed.

Therefore, when loading from a factory to a construction site on a truck bed or the like, the spiral blades do not get in the way and the steel pipes can be bundled in parallel and efficiently loaded. There is an advantage that efficiency can be increased.

Further, conventionally, a steel pipe is temporarily brought into a factory from a steel pipe supplier such as a company that manufactures the steel pipe, and the steel pipe is piled by processing such as attaching spiral blades to the steel pipe in the factory. After manufacturing, this steel pipe pile was transported to the construction site for use. However, the steel pipe used for the steel pipe pile according to the present invention is a normal steel pipe only having an insertion hole formed at the tip portion, and this insertion hole is formed by a simple operation using a common tool at a construction site. Therefore, it is possible to manufacture only the tip member for steel pipe piles in the factory and transport the steel pipes directly from the supplier to the construction site. Therefore, there is an advantage that unnecessary transportation costs can be reduced.

Further, even in the factory, conventionally, after the production of long steel pipes and steel pipe piles, a wide space for storing the steel pipe piles is required, and a spiral blade is directly attached to the long steel pipes. Although a large facility and a wide transportation space were required to perform processing such as attaching, according to the present invention, since only the tip member for the steel pipe pile is manufactured in the factory, a wide storage place is not required, and Another advantage is that the manufacturing equipment and the transportation space in the factory can be reduced.

A steel pipe pile according to a second aspect of the present invention is a steel pipe pile configured by connecting the tip member for the steel pipe pile according to the first aspect to a tip end portion of the steel pipe, wherein the steel pipe pile at the tip end portion of the steel pipe. Forming an insertion hole at a position corresponding to the insertion hole of the tip member for
The fitting portion is fitted into the inner circumference of the tip end portion of the steel pipe so that the insertion hole and the insertion hole of the steel pipe pile tip member correspond to each other, and then the fastener is inserted into each of the insertion holes and fastened to the steel pipe. Since the steel pipe and the tip member for steel pipe pile can be connected only by attaching the tool, there is an advantage that the steel pipe can be easily configured at a construction site.

Also, with respect to the rotational force around the axis that acts when the steel pipe piles thus joined are screwed into the ground, a fastener is attached to the joining portion between the tip end of the steel pipe and the tip member for the steel pipe pile. There is an advantage that the steel pipe and the steel pipe pile tip member can rotate integrally without being separated from each other.

[Brief description of drawings]

FIG. 1 is a front view showing a tip member for a steel pipe pile according to an embodiment of the present invention and a tip portion of a steel pipe coupled with the tip member.

FIG. 2 is a plan view of a tip member for a steel pipe pile according to an embodiment of the present invention.

FIG. 3 is a plan view showing a tip member for a steel pipe pile according to an embodiment of the present invention in which spiral blades have different configurations.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a vertical sectional view of a tip member for a steel pipe pile according to an embodiment of the present invention.

6 is a sectional view taken along line BB of FIG.

FIG. 7 is a front view showing a steel pipe pile according to an embodiment of the present invention.

FIG. 8 is a diagram showing a construction example when the steel pipe pile according to the embodiment of the present invention is buried in the ground.

FIG. 9 is a front view showing a steel pipe pile according to a conventional example.

[Explanation of symbols]

1 Tip member for steel pipe pile 3 steel pipe 4 Tip 5 Tip member body 7 spiral blade 10 insertion holes 11 Fitting part

Claims (2)

[Claims] 1. By being connected to the tip of a steel pipe,
A tip member constituting a steel pipe pile, which is a cylindrical or columnar tip member body having substantially the same outer diameter as the steel pipe, a spiral blade fixed to the outer periphery of the tip member body, and the tip member body. And a cylindrical or columnar fitting portion having an outer diameter that fits inside the tip portion of the steel pipe and has an insertion hole formed in the generatrix direction of the steel pipe. A tip member for a steel pipe pile, which is characterized in that 2. A steel pipe pile configured by connecting the tip member for a steel pipe pile according to claim 1 to a tip portion of the steel pipe, which corresponds to an insertion hole of the tip member for a steel pipe pile at the tip portion of the steel pipe. The insertion hole is formed at a position to be fitted, and the fastener is inserted into the inner circumference of the tip end of the steel pipe so that the insertion hole and the insertion hole of the steel pipe pile tip member correspond to each other. A steel pipe pile characterized by being inserted through a through hole and joined.