JP2016003477A - Driving pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a diving pile of a simple structure with a lesser number of components, the driving pile not subsiding deeper than a desired driving depth and not being pulled out by a lift force caused by wind, etc.SOLUTION: A driving pile has a first tongue-shaped part formed at a location of a prescribed height from a bottom end of a tubular pile body, the first tongue-shaped part having a free end facing downward, and a second tongue-shaped part formed at a location separated from the first tongue-shaped part in an axial direction of the pile body, the second tongue-shaped part having a free end facing upward. Here, it is desirable to install a retraining member along an outer periphery of the pile body, at a restraining position that blocks outward expansion of the free end of the first tongue-shaped part and the second tongue-shaped part, and at a release position that releases the blocked state, the restraining member being movable in the axial direction of the pile body. After driving the pile body to a desired depth in a ground, the restraining member is shifted from the restraining position to the release position to allow outward expansion of the free end of the first tongue-shaped part and the second tongue-shaped part, thereby preventing subsidence and pull-out of the pile body.

Description

  The present invention relates to a driving pile, and more particularly, to a driving pile that is prevented from sinking and coming off.

  For example, a driven pile used as a foundation for a scaffold at a construction site is required not to sink even when a predetermined amount of load is applied. In order to respond to such a request, the present applicant forms a tongue-shaped portion by inserting a plurality of slits at the lower end of the pile body, and the driven pile that prevents settlement by expanding the tongue-shaped portion toward the outside. Proposed (Patent Document 1). According to the proposed driving pile, the settlement is prevented, and the operation and effect that the pulling out is easy, that is, the removal of the scaffolding and the like can be obtained.

  By the way, in the solar power generation of mega solar that has been constructed in various places in recent years, a solid foundation is made of concrete, a frame is assembled on the foundation, and tens of thousands to hundreds of thousands of solar panels are installed. . Since it takes a lot of time and labor to produce a concrete foundation, it is considered to use a foundation pile that is easy to install instead of a concrete foundation.

  Solar panels are installed in a slanted south direction so that a lot of sunlight strikes them, so a large lift is generated depending on the wind direction. For this reason, for example, in Patent Document 2, a part of the portion buried in the ground after being placed is deformed so that the foundation pile is not pulled out even if the solar panel hits the wind and lift occurs. Foundation piles with increased resistance to pulling have been proposed.

JP 2011-236578 A JP 2013-199819

  However, the proposed foundation pile has a large number of parts and a complicated structure, which may increase the size and weight.

  Accordingly, an object of the present invention is to provide a driving pile that has a smaller number of parts, has a simple structure, does not sink from a desired driving depth, and does not come out even if lift due to wind occurs. .

  The driven pile according to the present invention that achieves the above object is provided with a first tongue-like portion at a predetermined height from the lower end of the cylindrical pile body so that the free end side is downward, and the first tongue-like portion The second tongue-like portion is provided in the axially spaced portion of the pile body so that the free end side is upward, and the free ends of the first tongue-like portion and the second tongue-like portion expand outward. The pile body is prevented from sinking and coming off.

  Here, at least one of the first tongue-shaped portion and the second tongue-shaped portion may be formed by cutting into the pile body.

  Alternatively, at least one of the first tongue-shaped portion and the second tongue-shaped portion may be formed by a member different from the pile main body and provided on the outer periphery of the pile main body.

  On the outer periphery of the pile main body, the pile main body has a restraining position for preventing at least one free end of the first tongue-shaped part and the second tongue-shaped part from spreading outward and a release position for releasing the blocking. A restraining member movable in the axial direction of the first tongue portion and / or the second tongue by driving the pile body into the ground to a desired depth and moving the restraining member from the restraining position to the release position. The outward extension of the free end of the shape portion may be enabled.

  The restraining member has a latching portion that engages with the lower end of the pile body, and the restraining member is engaged with the lower end of the pile body in a state where the restraining member is in the restraining position. You may make it suppress that a member moves from a restraint position to a cancellation | release position.

  The restraining member has a cylindrical first restraining portion wound around the outer periphery of the pile body and a second tongue-like portion so as to prevent the free end of the first tongue-like portion from spreading outward. A cylindrical second restraining portion wound around the outer periphery of the pile body, an impact portion for applying an external force to move the restraining member, and a first restraining portion so as to prevent the end from spreading outward And a second connecting part that connects the second restricting part and the striking part.

  Here, at least one of the first constraining part and the second constraining part is formed by connecting a plurality of arc-shaped pieces with a connecting piece, and at least one of the plurality of arc-shaped pieces and the connecting piece is a first connecting part. And at least one of the plurality of arc-shaped pieces and connecting pieces connected to at least one of the second connecting parts and connected to the first connecting part or the second connecting part moves in the axial direction of the pile body, The connection between the plurality of arc-shaped pieces and the connecting piece is released, and the restriction of the first tongue and / or the second tongue by the at least one of the first restriction part and the second restriction part is released. It may be.

  The restraining member may be a cylindrical member that covers at least one of the first tongue-shaped portion and the second tongue-shaped portion.

  The cylindrical member preferably has an enlarged diameter portion.

  In the driving pile according to the present invention, when the pile is driven into the ground, the first tongue portion and the second tongue portion spread outward, and the first tongue portion and the second tongue portion become resistors. The pile body is prevented from sinking and coming off.

It is a perspective view which shows an example of the driving pile which concerns on this invention. It is a partial expansion perspective view of the lower end of the driving pile concerning the present invention. It is a perspective view which shows the state which the restraint of the 1st tongue-shaped part by the 1st restraint part was cancelled | released, and the 1st tongue-shaped part expanded to radial direction outward. It is a perspective view explaining attachment to the pile main part of the 2nd tongue-like part. It is a perspective view which shows the state of a 2nd tongue-like part when a 2nd restraint part exists in a restraint position and a release position. It is a perspective view which shows other embodiment of a 2nd tongue-shaped part. It is a perspective view which shows other embodiment of a 1st restraint part. FIG. 8 is a partially exploded view of the first restraining portion in FIG. 7. It is a perspective view which shows the other example of the driving pile which concerns on this invention. It is a perspective view which shows the other example of a 1st restraint part.

  Hereinafter, although the driving pile concerning the present invention is explained based on a figure, the present invention is not limited to these embodiments at all. In the present specification, “downward” refers to the direction in which the driven pile is driven, and “upward” refers to the direction opposite to the driven direction.

  FIG. 1 is a perspective view showing an example of a driven pile according to the present invention. The driving pile shown in FIG. 1 has a cylindrical pile body 1 and a conical pointed member 3 detachably attached to the lower end of the pile body 1. The pile body 1 is formed with a plurality of first tongue-like portions 11 so that the free end side is downward by a notch 12 formed substantially parallel to the axial direction from the lower end of the pile body 1. In addition, a plurality of second tongue portions 21 are provided at a position spaced a predetermined distance above the first tongue portion 11 in the axial direction of the pile body 1 so that the free end side is upward. The first tongue portion 11 and the second tongue portion 21 are plastically deformed into a shape in which the free end side extends outward in the radial direction of the pile body 1, but the cylindrical first restraint portion 51 and the second restraint portion 21. Since the portion 52 is provided so as to surround the outer peripheries of the first tongue 11 and the second tongue 21, the free ends of the first tongue 11 and the second tongue 21 are radially outward. The spread to is blocked.

  Further, a cylindrical hitting portion 53 having a predetermined width is provided on the outer peripheral portion of the pile body 1 that appears on the ground surface when the driving pile of the present invention is driven into the ground to a desired depth. And the 1st restraining part 51 and the 2nd restraining part 52 are connected by the strip-shaped 1st connection part 54 provided in parallel with the axial direction of the pile main body 1, and the 2nd restraining part 52 and the striking part 53 are They are connected by the second connecting portion 55. In addition, in the driving pile shown in FIG. 1, the 1st connection part 54 and the 2nd connection part 55 are integrally molded. Of course, the 1st connection part 54 and the 2nd connection part 55 may be shape | molded separately, and may be provided in the position which differs in the circumferential direction, respectively. A plurality of the first connecting parts 54 and the second connecting parts 55 may be provided at a predetermined interval in the circumferential direction.

  In the present embodiment, the restraining member 5 includes a first restraining portion 51, a second restraining portion 52, a striking portion 53, a first connecting portion 54 and a second connecting portion 55. The restraint member 5 is movable in the axial direction of the pile body 1. Specifically, the first tongue 11 and the second tongue 21 can be moved freely between a restraining position where the free ends of the first tongue 11 and the second tongue 21 are prevented from spreading outward and a release position where the blocking is released. The restraint member 5 is moved by applying an upward or downward force to the striking portion 53 appearing on the ground surface after driving the driving pile into the ground to a predetermined depth. Usually, a large force is required to move the restraining member 5 in the axial direction after the driving pile is driven into the ground, so that the hitting portion 53 is hit using a hammer or the like.

  FIG. 2 shows a partially enlarged perspective view of the lower end portion of the driving pile according to the present invention. FIG. 2 is a state diagram when the first restraining portion 51 is at the restraining position, and the pointed member 3 is removed from the pile body 1 so that the structure can be easily understood. A plurality of claw portions (locking portions) 51 a are formed on the lower peripheral portion of the first restraining portion 51 downward. The plurality of claw portions 51 a are bent so as to engage with the lower peripheral portion of the pile body 1, and the first restraining portion 51 is locked to the lower end of the pile body 1. Thus, when the first restraining portion 51 is locked to the lower end of the pile body 1 with a predetermined strength, when driving the driven pile into the ground, the frictional resistance between the restraining member 5 and the ground The restraint member 5 is restrained from moving upward in the axial direction with respect to the pile body 1. On the other hand, after driving the driving pile to a predetermined depth, when the restraining member 5 is moved upward in the axial direction, it is not necessary to use excessive force for releasing the locking to the pile body 1 by the claw portion 51a. It becomes like this.

  The pointed member 3 includes a conical main body portion 31 and a plurality of engagement pieces 32 extending outward in the axial direction from the bottom peripheral portion of the main body portion 31. The pointed member 3 is attached to the pile body 1 by fitting a plurality of engagement pieces 32 into the lower end opening of the pile body 1.

  When the driven pile is driven to a predetermined depth in the ground, an external force is applied to the striking portion 53 of the restraining member 5, and the restraining member 5 moves from the restraining position to the release position. FIG. 3 shows a state when the first restraint 51 moves from the restraint position to the release position. As described above, since the first tongue 11 is plastically deformed into a shape in which the free end side spreads outward in the radial direction of the pile body 1, when the restraint by the first restraint 51 is released, The free ends of the one tongue-shaped portions 11 extend outward in the radial direction of the pile body 1. Thus, when the free end of the first tongue-shaped portion 11 expands radially outward, the first tongue-shaped portion 11 becomes a great resistance against the settlement of the pile body 1, and even in soft ground such as a swamp. The settlement of the pile body 1 is effectively suppressed. In addition, when the first tongue-shaped part 11 spreads radially outward, the pointed member 3 is disengaged from the pile body 1 and stops at that position.

  In FIG. 4, the perspective view explaining the attachment to the pile main body 1 of the 2nd tongue-shaped part 21 is shown. In the present embodiment, the second tongue 21 is attached to the pile body 1 after being formed separately from the pile body 1. Specifically, the molding member 2 in which the plurality of second tongue portions 21 are integrally formed in a comb-teeth shape is wound around the outer periphery of the pile body 1 so that the free end side of the second tongue portions 21 is upward. Attach to. At this time, it attaches so that the free end of the 2nd tongue-like part 21 can spread outward. That is, the base side of the second tongue 21 is attached to the pile body 1. There is no particular limitation on the attachment method, and conventionally known methods such as welding, adhesion, and screwing are used.

  FIG. 5 is a perspective view showing a state of the second tongue portion 21 when the second restraining portion 52 is in the restraining position and the release position. As shown in FIG. 5 (a), when the second restraining portion 52 is in the restraining position, the second restraining portion 52 surrounds the outer periphery of the second tongue-like portion 21, so that the second tongue-like portion 21 is free. The end cannot extend outward in the radial direction of the pile main body 1 and is in a position close to the pile main body 1. Next, when an external force is applied to the striking portion 53 of the restraining member 5 and the second restraining portion 52 moves from the restraining position to the release position, as shown in FIG. As described above, since the free end side is plastically deformed into a shape that spreads outward in the radial direction of the pile body 1, when the second restraining portion 52 is in the release position, the free end of the second tongue-shaped portion 21 is the pile body 1 outward in the radial direction. In this way, the free end of the second tongue-shaped portion 21 expands outward in the radial direction, so that the second tongue-shaped portion 21 becomes a great resistance to the pull-out of the pile body 1, and even if lift or the like is caused by wind, Removal of the driven pile is effectively prevented.

  In the embodiment described above, the first tongue-like portion 11 is formed by making the notch 12 in the pile body 1. However, like the second tongue-like portion 21, the first tongue-like portion 11 has a comb-like shape having the first tongue-like portion 11. The molded member may be prepared separately from the pile body 1 and attached to the pile body 1. Moreover, you may make it form the 2nd tongue-shaped part 21 by putting the notch | incision 13 in the pile main body 1, as shown in FIG. In the above embodiment, the movement of the restraining member 5 from the restraining position to the releasing position is such that the restraining member 5 is moved upward in the axial direction of the pile body 1. Absent. Further, the pointed member 3 is not necessarily attached to the pile body 1. For example, when the ground is relatively soft or when the pile driving depth may be relatively shallow, the pile body 1 may be driven into the ground without attaching the pointed member 3 to the lower end of the pile body 1. .

  FIG. 7 shows another embodiment of the first restraining portion. The first restraining portion 56 shown in FIG. 7 is a cylinder in which a plurality of arcuate pieces 6 are connected by connecting pieces 7. Specifically, the arc-shaped piece 6 has first engaging portions 61 formed by bending both ends in the circumferential direction approximately 180 degrees outward. The connecting piece 7 also has a second engaging portion 71 formed by bending both ends in the circumferential direction approximately 180 degrees inward. Then, the first engaging portion 61 of the arc-shaped piece 6 and the second engaging portion 71 of the connecting piece 7 are engaged, and the arc-shaped piece 6 and the connecting piece 7 are alternately connected, and the first restraining portion 56. Is formed.

  As shown in FIG. 8, a connecting piece 541 is integrally formed at the lower end of the first connecting portion 54a. Thus, when the restraining member 5 moves from the restraining position to the release position, the second engaging portion 71 of the connecting piece 541 formed in the first connecting portion 54a and the first engaging portion 61 of the adjacent arcuate piece 6 are formed. Is disengaged. The first restraining portion 56 restrains the outward expansion of the first tongue-like portion 11, in other words, the first restraining portion 56 is a force that tries to spread outward from the first tongue-like portion 11. Is receiving. For this reason, when the engagement between the arc-shaped piece 6 and the connecting piece 7 is partially released, the remaining arc-shaped piece 6 and the connecting piece 7 are caused by the force of spreading outward from the first tongue-shaped portion 11. And the arc-shaped piece 6 and the connecting piece 7 are separated. And the 1st tongue-shaped part 11 will be in the state which the free end expanded outward (refer FIG. 3).

  In the embodiment shown in FIGS. 7 and 8, the first restraining portion 56 has been described as an example, but the second restraining portion may of course have the configuration shown in these drawings.

  FIG. 9 is a perspective view showing another embodiment of the driving pile according to the present invention. The driving pile shown in FIG. 9 includes a molding member 2 in which a plurality of second tongue-like portions 21 are integrally formed in a comb-teeth shape shown in FIG. The forming member 4 in which the tongue-like portion 41 is integrally formed in a comb-like shape is attached at a position spaced apart from the first tongue-like portion 21 in the axial direction of the pile body 1 by a predetermined distance. There is no particular limitation on the method of attaching the molded member 2 and the molded member 4 to the pile body 1, and conventionally known methods such as welding, bonding, and screwing are used. And the cylindrical 1st restraining member 57 is provided so that the outer periphery of the 1st tongue-shaped part 41 may be surrounded, and the free end of the 1st tongue-shaped part 41 may spread to the radial direction outward of the pile main body 1. It is blocked (FIG. 9 (a)). The first restraining member 57 includes a restraining position (FIG. 9 (a)) that prevents the free end of the first tongue-like portion 41 from spreading outward in the radial direction of the pile body 1, and a release that releases the prevention. The pile body 1 can be moved in the axial direction to the position (FIG. 9B).

  In the driven pile having such a configuration, the first tongue 41 is covered with the first restraining member 57 at the initial stage of driving, and thus does not become a great resistance against the driving of the pile. In addition, since the second tongue 21 receives a force from the ground in the direction in which the free end is reduced in diameter when driven, the pile can be driven without providing a restraining member on the outer periphery of the second tongue 21. It does not become a big resistance.

  When the pile is driven further into the ground, the frictional resistance between the first restraining member 57 and the ground becomes larger than the frictional resistance between the first restraining member 57 and the molded member 4, and the first restraining member 57 is moved from the restraining position. Gradually move to the release position. And when the 1st restraint member 57 as shown in FIG.9 (b) will be in a cancellation | release position, the 1st tongue-shaped part 41 will spread gradually in the radial direction outward of the pile main body 1 according to the driving | operation of a pile, and a pile will be carried out eventually. This is a great resistance to the driving of the pile, making it impossible to drive the pile further. In other words, no further settlement of the pile occurs.

  On the other hand, when a pulling force is applied to the pile driven into the ground, soil or stone is taken in between the second tongue 21 and the pile body 1, and the second tongue 21 is removed. It spreads out and becomes a great resistance to pulling out piles. This prevents the pile from being pulled out.

  FIG. 10 shows another embodiment of the first restraining member 57. The first restraining member 57 shown in FIG. 10 has a diameter-expanding portion 571 that continuously increases in diameter upward. Since the diameter-enlarged portion 571 is formed on the first restraining member 57, the force received from the ground when the pile is driven into the ground is increased, and the first restraining member 57 is easily moved from the restraining position to the release position. Therefore, you may make it control the pile completion depth of a pile by adjusting the diameter, inclination, etc. of the enlarged diameter part 571. FIG. In addition, the enlarged diameter part 571 should just be the shape protruded to radial direction outward, and may have a flange shape etc. besides having the inclined surface which expands continuously. Further, the enlarged diameter portion 571 may be provided at any position in the axial direction.

  In the embodiment shown in FIGS. 9 and 10, the first tongue member 41 is provided with the first restraining member 57 and the second tongue member 21 is not provided with the restraining member. Of course, the second constraining portion having the same configuration may be provided on the second tongue-shaped portion 21. Or it is good also as a form which does not provide a restraining member in any of the 1st tongue-shaped part 41 and the 2nd tongue-shaped part 21 from a viewpoint which simplifies the structure of a pile.

  In the driving pile according to the present invention, when the pile main body is driven into the ground, the free ends of the first tongue-shaped portion and the second tongue-shaped portion expand outward. Thereby, the 1st tongue-shaped part and the 2nd tongue-shaped part become a resistance body, and the settlement and withdrawal of a pile main body are prevented, and it is useful.

DESCRIPTION OF SYMBOLS 1 Pile main body 2 Forming member 3 Pointed member 4 Forming member 5 Constraining member 6 Arc-shaped piece 7 Connection piece 11 1st tongue-shaped part 12 Cut 21 2nd tongue-shaped part 41 1st tongue-shaped part 51 1st constrained part 52 1st 2 constraining portion 53 striking portion 54 first connecting portion 55 second connecting portion 57 first constraining member 61 first engaging portion 71 second engaging portion 571 enlarged diameter portion

Claims (9)

In the part of the predetermined height from the lower end of the cylindrical pile body, the first tongue part is provided so that the free end side is downward, and the first tongue part and the part separated in the axial direction of the pile body, A second tongue is provided so that the free end is on the upper side;
A driven pile, wherein the free ends of the first tongue portion and the second tongue portion expand outward to prevent the pile body from sinking and coming off.   The driving pile according to claim 1, wherein at least one of the first tongue portion and the second tongue portion is formed by cutting into the pile body.   The driving pile according to claim 1 or 2, wherein at least one of the first tongue-shaped portion and the second tongue-shaped portion is formed by a member different from the pile main body and provided on an outer periphery of the pile main body. On the outer periphery of the pile main body, the pile main body has a restraining position for preventing at least one free end of the first tongue-shaped part and the second tongue-shaped part from spreading outward and a release position for releasing the blocking. A restraining member movable in the axial direction of
The pile body is driven into the ground to a desired depth, and the restraint member is moved from the restraint position to the release position, so that the free ends of the first tongue portion and / or the second tongue portion can be expanded outward. The driving pile according to any one of claims 1 to 3.   The restraining member has a latching portion that engages with the lower end of the pile body, and the restraining member is engaged with the lower end of the pile body in a state where the restraining member is in the restraining position. The driving pile according to claim 4, wherein the member is prevented from moving from the restraint position to the release position.   The cylindrical first restraining portion wound around the outer periphery of the pile body and the second tongue-shaped free portion so that the restraining member prevents the free end of the first tongue-like portion from spreading outward. A cylindrical second restraining portion wound around the outer periphery of the pile body, an impact portion for applying an external force to move the restraining member, and a first restraining portion so as to prevent the end from spreading outward The driving pile according to claim 4, further comprising: a first connecting part that connects the second restricting part and a second connecting part that connects the second restricting part and the striking part. At least one of the first restraining portion and the second restraining portion is formed by connecting a plurality of arc-shaped pieces with connecting pieces, and at least one of the plurality of arc-shaped pieces and connecting pieces is the first connecting portion and the second connecting piece. Connected to at least one of the connecting parts,
By moving at least one of the plurality of arc-shaped pieces and the connecting piece connected to the first connecting part or the second connecting part in the axial direction of the pile body, the plurality of arc-shaped pieces and the connecting piece The driving pile according to claim 6, wherein the connection is released and the restriction of the first tongue and / or the second tongue by at least one of the first restriction part and the second restriction part is released.   The driving pile according to claim 4 or 5, wherein the restraining member is a cylindrical member that covers at least one of the first tongue-shaped portion and the second tongue-shaped portion.   The driving pile according to claim 8, wherein the cylindrical member has an enlarged diameter portion.