JP2019085872A - Pile - Google Patents

Abstract

To provide a pile that can be easily buried in an installation surface and has high workability.SOLUTION: A steel pipe pile 20 is fixed so that blades 40 are rotated around a diameter of a virtual horizontal cut surface of a main body 30, at a predetermined angle in opposite directions to each other in a direction in which a diameter of the blade 40 is orthogonal to the axis. When the steel pipe pile 20 is rotated and buried, a progress direction side of a pair of blades 40 disposed on both sides simultaneously drills the installation surface, thus the steel pipe pile 20 does not incline. A pair of column members 32 disposed on a tip side are buried in the installation surface in advance, and the steel pipe pile 20 is installed at a desired position and desired angle.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pile.

  DESCRIPTION OF RELATED ART Conventionally, various kinds of piles are known as a pile used by screwing in the ground etc. as a foundation. For example, in Patent Document 1, a circular hollow body portion and a first expanded bottom plate provided on the bottom surface of the body portion have a first inclination angle with respect to a horizontal plane perpendicular to the axis of the body portion. A fan-shaped first expanded bottom plate, a second expanded bottom plate provided on the bottom surface of the main body, and a fan-shaped second expanded bottom plate having a second inclination angle different from the first inclination angle, and a first expanded bottom A steel pipe pile is described which comprises an opening provided between a plate and a second bottom plate. By doing this, it is possible to provide a steel pipe pile having an enlarged bottom portion having sufficient supporting power, which is easy to manufacture and in which penetration into the ground is efficiently performed.

JP, 2009-138487, A

  However, in such a steel pipe pile, the overall shape of the first expanded base plate and the second expanded base plate with respect to the ground becomes an elliptical shape by locating the digging claw between the first expanded base plate and the second expanded base plate. And when it is rotated and embedded in the ground, the axis when rotated is more likely to shake than in the case of a circular shape, the stability when embedded in the ground is low, and the workability is poor There is.

  The present invention has been made in view of such problems, and its main object is to provide a highly reliable pile having high workability by enhancing stability when penetrating.

  The present invention adopts the following means in order to achieve the above-mentioned main objects.

The pile of the present invention is
It is a pile that penetrates to the ground from one end side,
The cylindrical main body portion open at one end side,
A pair of vanes fixed in a state in which a part is inserted in a groove provided on a side surface of the main body;
A pair of pillar members fixed respectively to the blade and the inner side surface of the main body and protruding in the one end direction;
Equipped with
The pair of vanes are rotated in opposite directions at a predetermined angle in the direction perpendicular to the axis, with the diameter of the vanes as an axis, with the diameter of an imaginary cutting plane for cutting the main body horizontally. Each is characterized by being fixed,
It is a thing.

  In this pile, the vanes are fixed in a state in which the diameters of the vanes are respectively rotated at predetermined angles in opposite directions in the direction orthogonal to the axis, with the diameter of the virtual cutting plane for cutting the main body horizontally as an axis It is done. By doing this, the pair of vanes are fixed in a state in which they are inclined at the same angle in opposite directions with respect to the main body. In other words, it can be said that the slats are disposed in a positional relationship in which the upper surface sides of the slats cross each other. Therefore, when the pile is vertically rotated and buried, the lower part of the pair of first vanes provided on both sides excavates the installation surface at the same time, so the pile is easily vertically buried. can do. In addition, since a pair of column members are provided on the tip side, when the pile is embedded, the angle of the pile changes with respect to the installation surface, or the pile moves on the surface of the installation surface to install the installation position It is possible to reduce the possibility of moving in advance. At this time, since the front end side of the column member is positioned in the direction of the front end of the main body portion than the front end side of the blade, when the pile is rotated and inserted, first, the pair of column members is rotated. The soil near the central part is excavated and subsequently buried in the ground in order of the main body of the pile, the slats and so on. At this time, since the soil near the center of the pile is excavated by the rotation of the pair of column members, the force applied from the soil to the main body can be reduced when the main body is penetrated. In addition, when a pair of slats is rotated and penetrates into the soil, the slats are embedded in the soil from the central part already softened by the column members, so the force applied from the soil to the slats is also reduced can do. That is, since it is possible to reduce the force applied from the soil to the main body portion or the slats when penetrating the pile, the workability is high, and when penetrating, the pile is inclined to the installation surface, and the installation surface is It is possible to reduce the possibility that piles can not penetrate vertically.

  In the pile of the present invention, the position of the one end side of the pair of pillar members, the position of the one end side of the main body portion and the position of the most end side of the pair of vanes are the most end side of the pair of pillar members The position may be in the order of the position on the one end side of the main body and the position on the most end side of the pair of the vanes. In this way, when the pile is rotated and embedded, the pair of column members, the main body, and the pair of vanes are embedded in the soil in this order, so the position of the one end of the vanes is buried At the time of entry, the blade is embedded in a state of being softened by excavation by rotation of the pair of column members, the blade is curved by hard soil, and the digging force by the blade is attenuated. The possibility of doing so can be reduced in advance. In other words, by preventing the bending of the slats in advance, it is possible to maintain the intended workability at the time of design.

  In the pile of the present invention, the pair of column members may be fixed to the inner side surface of the side surface of the main body portion. By doing this, as compared with the case where the pillar member is fixed to the outer side surface of the side surface of the main body portion, in addition to the fixing portion where the main body portion and the pillar member are fixed when penetrating into the ground. Since the force exerted can be reduced, the possibility of the pillar member coming off the main body can be reduced in advance.

  In the pile of the present invention, the pair of pillar members may be provided at positions abutted on both the surface of one of the pair of vanes and the side surface of the other vane. . By doing this, when the column member is penetrated into the ground, the column member is supported by two surfaces of the surface of one plate and the side surface of the other plate, so only one of them is supported. As compared with the case, the possibility of detachment of the column member can be reduced in advance. In addition, when the soil is excavated with the column member by rotating it, even if a large force is applied to the column member, it is supported by two surfaces of the surface of one blade and the side surface of the other blade. Since the rotational force can be used for the digging force of the column member while reducing the possibility of deformation of the column member, it has high workability.

  The pillar member has a connection recess thicker than the thickness of the side surface of the main body portion, and the pillar member is made to contact the blade plate and the main body portion by bringing the inner side surface of the main body portion into contact with the connection recess. It may be characterized in that it is fixed. In this way, when fixing the column member, the front end side surface of the main body and the inner side surface of the side surface can be fixed to the connection recess, so compared to the case where the connection recess is not provided It can be fixed more firmly. In the pile of the present invention adopting this aspect, the outer side surface of the pillar member may be positioned outside the outer side surface of the main body when the pillar member is fixed to the main body. By doing this, a part of the pillar member is located outside the main body part, so when the pillar member rotates and penetrates to the ground, the main body part is embedded in the excavated part by the rotation of the pillar member As a result, the force applied from the soil to the main body can be reduced, and the possibility of deformation or breakage of the main body can be reduced in advance. Moreover, since it can reduce the force to embed at the time of embedding a main-body part, it has high construction property.

  In the pile of the present invention, the straight side surfaces of the pair of vanes may be characterized by having an inclined surface. In this way, compared to the case where the straight side face is a plane perpendicular to the surface of the blade, the digging force of the blade when penetrating into the ground can be enhanced, and therefore penetration into the ground High workability can be obtained when In addition, the whole linear side surface may be an inclined surface, and one part may be an inclined surface. By setting a part as an inclined surface, the strength and digging force of the blade can be kept high.

  In the pile of the present invention, the surface on one end side of the pillar member may have an inclined surface. By doing this, it is possible to obtain high workability when embedding in the ground, as compared to the case where the surface on one end side does not have an inclined surface.

FIG. 1 is a front view showing an outline of the configuration of a steel pipe pile 20. As shown in FIG. FIG. 2 is a side view showing an outline of the configuration of the steel pipe pile 20. As shown in FIG. FIG. 3 is a cross-sectional view taken along the line A-A. FIG. 4 is a cross-sectional view taken along the line B-B. FIG. 5A is a plan view showing the outline of the configuration of the vanes 40, and FIG. 5B is a bottom view showing the vanes 40 attached to the steel pipe pile 20. As shown in FIG. FIG. 6 is an explanatory view for explaining the method of burying the steel pipe pile 20, and FIG. 6 (A) shows a state before the steel pipe pile 20 is buried, and FIG. 6C shows a state in which the steel pipe pile 20 is embedded, respectively. FIG. 7A is a plan view showing an outline of the configuration of the blade plate 40 of the second embodiment, and FIG. 7B shows a state in which the blade plate 40 of the second embodiment is attached to the steel pipe pile 20. It is a bottom view which shows. FIG. 8A is a plan view showing an outline of the configuration of the blade 140 of the third embodiment, and FIG. 8B shows a state where the blade 140 of the third embodiment is attached to the steel pipe pile 20. It is a bottom view which shows.

  Next, the structure of the steel pipe pile 20 which is an example of embodiment of the pile of this invention is demonstrated in detail using FIGS. 1-4. Here, FIG. 1 is a front view showing an outline of the structure of the steel pipe pile 20, FIG. 2 is a side view showing an outline of the structure of the steel pipe pile 20, and FIG. 3 is an A-A sectional view FIG. 4 is a cross-sectional view taken along the line B-B. The steel pipe pile 20 which is an example of embodiment of this invention is equipped with the cylindrical main-body part 30 and the vane 40 (vane plate 40a and the vane plate 40b) provided in the side of the main-body part 30, respectively. There is.

  As shown in FIG. 1, the main body 30 is a cylindrical member made of steel, and on one end side (on the lower side in FIG. 1, which is the advancing direction side when penetrating the installation surface), A pair of protruding column members 32 a and column members 32 b (hereinafter also referred to as “column members 32”) are provided. The column member 32 a is fixed to one end of the main body 30 to the inner side surface of the main body 30, the surface of the blade plate 40 a, and the side surface of the blade plate 40 b. They are fixed to the inner side surface of the main body 30, the surface of the blade plate 40b, and the side surface of the blade plate 40a (see FIG. 3). For this reason, when the steel pipe pile 20 is rotated and embedded in the installation surface, the column member 32 is also rotated with the rotation of the steel pipe pile 20, and the installation surface is excavated around the rotation axis of the main body 30. By doing this, the steel pipe pile 20 can be easily embedded.

  Here, the column member 32 will be described in more detail. The pillar member 32 has a shape in which one end side of a substantially square pillar is cut off obliquely as shown in FIG. 1 and FIG. 2, and as shown in FIG. ing. In other words, the column member 32 is a member having a substantially pentagonal appearance having the connection recess 33. Since the connection recess 33 has a protrusion larger than the thickness of the side wall of the main body 30, when the connection recess 33 is in close contact with and fixed to the side surface of the main body 30, A part will be fixed in the state which protruded outside. Therefore, when the main body portion 30 is rotated and buried in the soil, the pillar members 32 excavate the outer side of the main body portion 30, so that the main body portion 30 is buried in the soil without directly hitting hard soil. can do. In other words, it has high workability. In this manner, by providing the connection recess 33, the column member 32 and the main body 30 are adjacent to each other and the weldable area is increased as compared with the case where the connection recess 33 is not provided. The main body portion 30 can be fixed more firmly. In other words, when the steel pipe pile 20 is rotated and embedded, the possibility of the column member 32 separating from the main body 30 during soil excavation can be reduced in advance, and the torque of the steel pipe pile 20 can be efficiently excavated. It can be used well.

  As shown in FIG. 5, the slat plate 40 is a steel plate-like member having a substantially semicircular shape whose central portion is removed in a substantially semicircular shape, all having the same shape and partially cut away It is a fan-shaped member in the state (see FIG. 5A). The blade plate 40 is a steel plate-like member, and a semicircle smaller in diameter than the outer diameter of the main body 30 is cut out at a position corresponding to the radius of the semicircle, and fixed to the main body 30 Even when being carried out, the one end side of the steel pipe pile 20 will be in the open state. Furthermore, since a part of the surface of the blade plate 40 also appears inside the main body portion 30, the column member 32 can be attached to the surface of the blade plate 40 inside the main body portion 30. The blade plate 40 is attached to one end side of the main body 30 by being welded to the main body 30 in a state where a part is inserted into the groove 34 provided on the side surface of the main body 30 (see FIG. 3) . By doing this, even if a force from the soil is applied to the blade plate 40 at the time of embedding, the blade plate 40 may be curved at the time of embedding by partially inserting the groove portion 34 of the main body 30. The possibility of dropping off from the main body 30 can be reduced in advance. Further, by inserting into the groove portion 34, the possibility that the mounting position and mounting angle of the blade 40 become unintended positions and angles during welding can be reduced in advance, as compared with the case where the groove portion 34 is not provided. . At this time, the blade 40 is attached at an angle of about 15 ° to the blade 40a and -15 ° to the blade 40b with the virtual cross section as an axis with respect to the virtual cross section for cutting the main body 30 horizontally. ing. Further, as shown in FIG. 1, on the upper side of the linear side surface corresponding to the radius of the semicircle of the blade plate 40, an inclined surface 42 inclined by about 45 ° is provided.

  In addition, since each of the substantially semicircular fan-shaped vanes 40a and 40b is welded in a state in which a part is inserted in the groove portion 34 on the opposite side to each other across the main body portion 30, it is Thus, when viewed from the tip side, the plate 40 a and the plate 40 b appear circular as a rough shape. At this time, since the blade 40a and the blade 40b have a substantially semicircular shape with one side cut away and are provided on the opposite side of the main body 30, there is no position where the blade 40a and the blade 40b overlap. By doing this, even if an upward force is applied to the steel pipe pile 20 after the steel pipe pile 20 is installed in the ground etc., the force from the ground is evenly distributed to the upper surface side of the vane 40. As a result, the possibility of the steel pipe pile 20 rotating can be reduced in advance. In other words, due to the fact that the nicks pass through the soil at the time of burying by nicking, burying is easy, but after burying, it is difficult to be removed.

  Here, the positional relationship between the position on the most end side of the vane plate 40, the position on the one end side of the main body 30, and the position on the most end side of the column member 32 will be described in detail. As shown in FIG. 2, the position of the most end side of the vane plate 40 and the position of the one end side of the main body portion 30 and the position of the most end side of the column member 32 are the position of the most end side of the column member 32, the main body portion 30. It is fixed so that it may become a positional relationship in which the position of one end side and the position of the most end side of the blade 40 are arranged in order. Therefore, when the steel pipe pile 20 is rotated and embedded, first, one end side of the column member 32 is rotated to excavate the soil, and then the main body portion 30 is embedded in the soil, and the slat 40 There will be drilling to excavate the soil. In this way, by first rotating the column member 32 with the smallest rotation radius to excavate the ground, even in hard soil, the central portion is excavated by the column member 32, and the blade plate 40 is bent or broken. It is possible to reduce the possibility of At this time, since the outer side of the column member 32 is positioned outside the outer surface of the main body 30, the soil in the vicinity of the main body 30 is excavated by the rotating columnar member 32, and the main body 30 is buried smoothly. be able to. In addition, the slats 40 may be curved or broken by the slats 40 being excavated in a wider area compared to the column members 32 being buried in the soil most at the time of implantation. Can be greatly reduced.

  Then, the embedding method which embeds the steel pipe pile 20 on the ground is demonstrated using FIG. FIG. 6 is a schematic view schematically showing a method of burying the steel pipe pile 20 on the ground. When the steel pipe pile 20 is embedded in the ground, a flange (not shown) is attached to the other end side (upper side in FIG. 6) of the steel pipe pile 20, and the steel pipe pile is fixed by rotating this flange to a heavy machine 20 is rotated and embedded in the ground (see FIG. 6 (A)).

  With rotation of the steel pipe pile 20, the column member 32 located in the one end side (tip of the advancing direction side) of the steel pipe pile 20 rotates, and excavates the ground. Soil softened by rotation of the column member 32 is introduced into the interior of the steel pipe pile 20 on the cylinder as the steel pipe pile 20 is embedded.

  Subsequently, the blade 40 provided on one end side of the main body portion 30 excavates the ground around the main body portion 30 as the steel pipe pile 20 rotates (see FIG. 6B). At this time, the blade 40 is attached to the same position at the same angle (for example, 15 °) in the one end direction and the other end direction with respect to the vertical cross section of the main body 30, respectively. The positions of the lowermost end of the vane plate 40a and the lowermost end of the vane plate 40b are located on a plane parallel to the vertical cross section of the main body 30 (the position of the broken line C in FIG. 6A). By rotating the steel pipe pile 20 in this state, the side direction can be excavated evenly, so the steel pipe pile 20 can be vertically inserted without being inclined to the ground.

  According to the steel pipe pile 20 of the present embodiment described in detail above, the diameter of the vane plate 40 is in the direction orthogonal to the axis, with the diameter of the virtual cutting plane where the vane plate 40 cuts the main body 30 horizontally. The respective vanes 40 are fixed in a state in which they are inclined at the same angle in opposite directions with respect to the main body portion 30 since they are fixed in a state in which they are rotated in the opposite direction by a predetermined angle. By doing this, when the steel pipe pile 20 is rotated and embedded, the traveling direction sides of the pair of vanes provided on both sides excavate the installation surface at the same time, so the steel pipe pile 20 does not tilt It can be easily inserted vertically and has high workability. At this time, since the pair of column members 32 is provided on the tip end side, when installing the column members 32, it is easy to install at a desired position and a desired angle by embedding in the installation surface in advance. Can be enhanced. In addition, when the steel pipe pile 20 is rotated and embedded, since the pillar member 32 located on the most advancing direction side excavates the soil first, the soil is excavated by the rotation of the pillar member 32, It is possible to reduce the labor when the main body 30 is embedded. In addition, when the pair of slats 40 is rotated and penetrates into the soil, the slats 40 are embedded in the soil from the central portion that is already softened by the column members 32. The force applied from the body can also be reduced. Furthermore, when the steel plate pile 20 is buried in the ground, the soil can pass through the notch portion when the steel plate pile 20 is buried in the ground, because You can escape unnecessary soil. That is, when the steel pipe pile 20 is penetrated, the force applied from the soil to the main body 30 and the slats 40 can be reduced, so that the workability is high, and the possibility of being inclined and embedded when buried It can be reduced in advance.

  In addition, since the pair of column members 32 is fixed to the inner side surface of the side surface of the main body 30, when penetrating into the ground, as compared to the case where it is fixed to the outer side surface of the side surface of the main body 30 The possibility of the column member 32 being detached from the main body 30 by the force from the soil can be reduced in advance.

  Furthermore, since the column member 32 is provided at a position to be in contact with both the surface of one blade 40 and the side of the other blade 40 in addition to the inside of the side surface of the main body 30, it penetrates into the ground. When the force applied from the soil to the column member 32 is supported by either the surface of one blade plate 40 or the side surface of the other blade plate 40, the force applied from the soil to the column member 32 is a steel pipe pile As a result, the entire support member 20 can be supported, and the possibility of the column member 32 being deformed or detached can be reduced in advance. Further, when the steel pipe pile 20 is rotated, a force is directly applied to the column member 32 from the side surface of the other blade plate 40, so that the rotational force can be effectively used as a force for digging the column member 32 .

  Furthermore, since the connection recess 33 thicker than the thickness of the side surface of the main body 30 is provided in the column member 32, the connection recess 33 is fixed in contact with the inner side surface of the main body 30, The pillar members 32 are respectively fixed by the surface of the vane plate 40 and the inner side surface of the main body portion 30. By this, the column member 32 is firmly fixed, and the possibility of the column member 32 falling off can be reduced in advance.

  At this time, since a part of the column member 32 is located outside the outer surface of the main body 30, when it is rotated and penetrates into the ground, the portion cut by the rotation of the column member 32 is excavated. Since the main body 30 is to be embedded, the force applied from the soil to the main body 30 can be reduced, and the possibility of the main body 30 being deformed or broken can be reduced in advance. In addition, since the column member 32 is directly applied with a rotational force when the main body 30 rotates from the side surface of the other blade plate 40, the force around the main body 30 is excavated using the rotational force of the main body 30 can do. For this reason, in order to be able to utilize efficiently the rotational force at the time of embedding a main-body part, it has high construction property.

  And since slope 42 is formed in a part of upper part side of a straight side of a pair of feathers 40, when feather 40 rotates at the time of embedding, feathers 40 rotate with slanted surfaces. Resistance during drilling can be reduced, and the steel pipe pile 20 can be embedded with little effort.

  And since the inclined surface is provided in one end face of pillar member 32, when embedding steel pipe pile 20, it is excavated by one end face of pillar member 32, and steel pipe pile 20 can be buried with little labor. it can.

  It is needless to say that the present invention is not limited to the above-mentioned embodiment at all, and can be implemented in various modes within the technical scope of the present invention.

  For example, in the above-described embodiment, the substantially semicircular blade 40 which is partially cut off is used, but as shown in FIG. 7, the notch may not be provided. As a result, even if a force is applied upward after being buried in the ground, the blade 40 is positioned as a whole when viewed from the vertical direction, so it is hard to come off.

  In the above-described embodiment, at least a portion of the column member 32 protrudes outward in relation to the outer surface of the main body 30, but it may be located on substantially the same plane as the outer surface of the main body 30. It may be inside the outer surface of the main body 30. In any case, the same effect as the above-described embodiment can be obtained.

  In the embodiment described above, the substantially semi-circular blade plate 40 is used, but as shown in FIG. 8A, the substantially fan-shaped blade plate in a state where a part is missing as compared to the substantially semi-circular shape. 140 may be used. At this time, when the blade plate 140 is fixed to the main body 30, as shown in FIG. 8B, a portion where a part is missing is located at one end side (advancing direction side at the time of embedding) as compared with the substantially semicircular shape. The slats 140 may be fixed in the same manner. By doing this, since the soil pushed away when embedding the steel pipe pile 20 can pass between the pair of vanes 140, the case of using the vanes 40 having a substantially semicircular shape and In comparison, it is possible to reduce the possibility of the blade 140 bending and to reduce the force required for implantation. In other words, high workability can be obtained as compared with the substantially semicircular blade plate 40.

  Here, the difference between the blade 40 and the blade 140 will be described. The blade plate 40 and the blade plate 140 differ in the portion which is missing when compared with the substantially semicircular shape. As shown in FIG. 8A, the slat plate 140 has a portion which is rectilinearly broken from the inner side surface to the outer side surface, but in the slat plate 40, as shown in FIG. The sides of the are partially bent. As shown in FIG. 5B, the blade plate 40 is bent at a position in contact with the outer surface of the main body 30 when attached to the main body 30. By this, when attaching the column member 32, it can be fixed to the same position as the above-described embodiment. In addition, when attaching the column member 32, as shown to FIG. 5B, you may attach to the position which protrudes rather than the linear side surface. By this, when the steel pipe pile 20 is rotated and embedded, the column member 32 is positioned on the front side in the rotation direction, so that the force applied to the blade plate 40 from the soil can be reduced. By doing this, it is possible to reduce in advance the possibility that the blade 40 is curved or the straight side surface of the blade 40 is broken. In addition, parts other than the shape of the vane 240 are the same as those in the above-described embodiment, and thus the same reference numerals are given and the description thereof is omitted here.

  In the embodiment described above, the pair of vanes 40 are inclined at an angle of 15 ° to the side face of the main body 30 with respect to the horizontal cross section of the main body 30, but this angle is limited to 15 °. It may be an angle of not less than 5 ° and less than 30 °, or an angle of not less than 15 ° and less than 20 °. By increasing the angle at which the blade 40 is inclined, the force received by the blade 40 from the soil increases when it is pulled out, so the resistance to the extraction force increases, but the load on the weld between the main body 30 and the blade 40 The angle of inclination of the blade plate 40 can be appropriately determined in consideration of the strength of the blade plate 40, the state of the soil, and the assumed extraction force.

  As shown in the above-described embodiment, it can be used as a pile to be buried in the ground, in particular, as a foundation pile to be buried in the ground when building a building.

  DESCRIPTION OF SYMBOLS 20 ... Steel pipe pile, 30 ... Body part, 32 ... Column member, 32a ... Column member, 32b ... Column member, 33 ... Connection recessed part, 34 ... Groove part, 40 ... Plate, 40a ... Plate, 40b ... Plate, 42 ... inclined surface, 140 ... blade plate.

Claims (8)

It is a pile that penetrates to the ground from one end side,
The cylindrical main body portion open at one end side,
A pair of vanes fixed in a state in which a part is inserted in a groove provided on a side surface of the main body;
A pair of pillar members fixed respectively to the blade and the inner side surface of the main body and protruding in the one end direction;
Equipped with
The pair of vanes are rotated in opposite directions at a predetermined angle in the direction perpendicular to the axis, with the diameter of the vanes as an axis, with the diameter of an imaginary cutting plane for cutting the main body horizontally. Each is characterized by being fixed,
Pile. The position of the one end side of the pair of pillar members, the position of the one end side of the main body portion, and the position of the most end side of the pair of vanes are the position of the first end side of the pair of pillar members, It is characterized in that it is positioned in the order of the position on one end side, and the position on the most end side of the pair of the vanes,
The pile according to claim 1. The pair of column members are fixed to the inner side surface of the side surface of the main body portion,
The pile according to claim 1 or 2. The pair of column members are provided at positions in contact with both the surface of one of the pair of blade plates and the side surface of the other blade plate,
The pile according to any one of claims 1 to 3. The pillar member has a connection recess thicker than the thickness of the side surface of the main body portion,
The column member is fixed to the blade and the main body by bringing the inner surface of the main body into contact with the connection recess.
The pile according to any one of claims 1 to 4. When the pillar member is fixed to the main body portion, the outer side surface of the pillar member is positioned outside the outer side surface of the main body portion.
The pile according to claim 5. The straight side surfaces of the pair of vanes have an inclined surface,
The pile according to any one of claims 1 to 6. The surface on one end side of the pillar member has an inclined surface,
The pile according to any one of claims 1 to 7.

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