JP2018017017A - Cap for foundation pile, and installation method of support post - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cap that facilitates fitting of a support post on a foundation pile.SOLUTION: A cap for a foundation pile is a cap 41 fitted on a top edge part 32 of a tubular foundation pile 31 buried in a ground 20, and includes a ring-form disc 42, a hanging piece 43 hanging from a peripheral edge of the disc, and a through-hole 44 communicating a space above the foundation pile 31 and an outdoor space outside of the foundation pile 31 while the cap is fitted on the top edge part 32 of the foundation pile 31. The top edge part 32 of the foundation pile 31 is covered by the disc 42, the hanging piece 43, and a side wall surface part of the through-hole 44. The through-hole 44 includes a tapered part 47 of which a diameter gradually decreases toward an opening bottom end 46.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a cap using a foundation pile for standing a support column of an installation such as a fence, a signboard, and a sign on the ground, and an installation method for installing the column on a foundation pile to which the cap is attached.

Conventionally, when installing an installation such as a fence, a signboard, a sign, or the like on the ground, a foundation is embedded in the ground, and a support column of the installation object is inserted into the foundation, and the support column of the installation is erected on the ground.
As a method of installing the foundation, there is a method of embedding a concrete block having a column fixing hole into which a column is inserted on the upper surface (see, for example, Patent Document 1). There is a problem that it needs to be formed and takes time and effort.
For such a problem, there is a method of driving a metal tubular foundation pile into the ground (for example, see Patent Document 2).

JP 2006-299530 A JP 2000-64306 A

However, in the driving of the conventional foundation pile disclosed in Patent Document 2, the foundation pile is generally a cylindrical one, but the column is not only a cylindrical one but also a rectangular cross section, a square corner. Since the cylinder is often used, in the former case, when the outer diameter of the column is smaller than the inner diameter of the foundation pile or in the latter column, a gap is easily generated between the foundation pile and the column. However, there was a problem that the position of the foundation pile was troublesome.
Then, an object of this invention is to provide the cap for making it easy to attach a support | pillar with respect to a foundation pile, and the installation method of the support | pillar using this cap in view of this problem.

  In order to achieve the above object, a foundation pile cap according to the present invention is a cap attached to the upper end portion of a tubular foundation pile embedded in the ground, and is a hanging piece hanging from a ring-shaped disk and its outer periphery. And a through-hole communicating with the upper space of the foundation pile and the external space outside the foundation pile in a state of being attached to the upper end of the foundation pile, and the foundation by the disk, the hanging piece, and the side wall surface portion of the through-hole. While the upper end part of a pile is covered, the said through-hole has the taper part which becomes a small diameter gradually toward an opening lower end, It is characterized by the above-mentioned.

  Further, the column installation method according to the present invention is a column installation method in which a column is installed on a foundation pile to which the cap is attached, and an embedding step in which the upper end of the foundation pile projects from the ground. The step of attaching a cap to the upper end portion of the foundation pile, and the taper that is provided in the cap and communicates with the upper space of the foundation pile and the external space outside the foundation pile, and gradually decreases in diameter toward the lower end of the opening. It includes an insertion step of inserting a column into a through-hole having a portion, and a filling step of filling the internal space of the foundation pile and the tapered portion with mortar.

  According to the foundation pile cap of the present invention, the through hole of the cap has a tapered portion that gradually decreases in diameter toward the lower end of the opening, so that a filler such as cement and mortar is passed through the support in the through hole. By filling and solidifying with, the cap will not easily come off the foundation pile.

  In addition, according to the method of installing the support of the present invention, the cap attached to the foundation pile is guided to the position of the lower end of the opening when the support is passed through the tapered portion, so that the support is guided to a predetermined position and tilted. This makes it easier to attach the column to the foundation pile.

It is a perspective view for demonstrating the installation method of the foundation pile which concerns on the 1st Embodiment of this invention. It is a perspective view for demonstrating the installation method of the foundation pile which concerns on the 1st Embodiment of this invention. It is explanatory drawing of the principal part of FIG.2 (b). It is explanatory drawing of the principal part of FIG.2 (d). It is a top view of the principal part of FIG. It is explanatory drawing of the principal part of FIG.2 (d).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
One embodiment of the column installation method according to the present invention will be described with reference to FIGS.

FIG.1 and FIG.2 is a figure for demonstrating the installation method of the foundation pile which concerns on this embodiment.
First, as shown in FIG. 1A, a tubular foundation pile 31 is erected on a place where a foundation is installed on the ground 20, and the driving member 10 is disposed above the foundation pile 31.
Here, the driving member 10 has a narrow portion 12 having a width (diameter) D2 smaller than the width (diameter) D1 of the circular opening 33 at the upper end of the foundation pile 31 at the lower end and a width larger than the opening 33 ( A jig having a wide portion 11 having a diameter D3 above the narrow portion 12. The narrow portion 12 and the wide portion 11 are both disk-shaped plate members and are connected in a state where the main surfaces are arranged in parallel.

  Further, the driving member 10 is further disposed between the narrow portion 12 and the wide portion 11, and is disposed above the wide portion 11 and the bar 13 that connects the centers of gravity of the narrow portion 12 and the wide portion 11. The lower end has a bar 14 connected to the wide portion 11. Since the bar 13 has a smaller diameter than the width D <b> 2 of the narrow portion 12, it can be inserted into the opening 33 at the upper end of the foundation pile 31 together with the narrow portion 12. The bar 14 is a gripping part that an operator grips with a hand when placing the driving member 10 at a predetermined position. The bars 13 and 14 may be one bar that penetrates the wide portion 11 instead of separate bars.

  Next, as shown in FIG. 1B, the narrow portion 12 and the bar 13 of the driving member 10 are inserted into the opening 33 at the upper end of the foundation pile 31, and the periphery of the wide portion 11 is the foundation pile 31. Push it down until it catches on the top edge. In this hooked state, the lower surface of the wide portion 11 is in contact with the opening end surface of the upper end of the foundation pile 31, and the opening 33 at the upper end of the foundation pile 31 is covered with the wide portion 11. And the narrow part 12 is located in the foundation pile 31, without protruding from the opening of the lower end of the foundation pile 31, and has divided the space in the foundation pile 31 into two, upper space and lower space.

  Next, as shown in FIG. 1C and FIG. 1D, the upper end of the bar 14 of the driving member 10 is struck downward with a tool 30 such as a hammer so that the wide portion 11 of the driving member 10 is widened. Is pressed against the ground 20 by driving it against the open end face of the upper end of the foundation pile 31. Then, when the upper end 32 of the foundation pile 31 is slightly protruded from the ground 20 (FIG. 1D), the driving of the foundation pile 31 is finished. When the driving member 10 can be disposed at a predetermined position by gripping the wide portion 11, the bar 14 may not be provided on the driving member 10, and in this configuration, the upper surface of the wide portion 11 is beaten by the tool 30. The foundation pile 31 is driven.

Here, when the foundation pile 31 is driven, the underground soil gradually enters the foundation pile 31 through the opening at the lower end of the foundation pile 31 as the foundation pile 31 penetrates deep into the ground. However, as shown in FIG. 1 (c), when the underground soil penetrates to the narrow portion 12, the narrow portion 12 presses the invaded soil downward. No longer intrudes into 31. As a result, as shown in FIG. 1 (d), in the foundation pile 31 that has been driven into the ground 20, all of the lower space among the lower space and the upper space separated by the narrow portion 12 in the foundation pile 31 is present. While being located below the ground 20 and being filled with underground soil, the upper space is partially below the ground 20 and not being filled with underground soil.
Further, in driving the foundation pile 31, the wide portion 11 of the driving member 10 is strongly pressed against the open end surface of the upper end of the foundation pile 31. Therefore, the lower surface of the wide portion 11 that is in contact with the opening end surface of the foundation pile 31 is not elastic, such as resin, so that a large impact sound is not generated by this pressing and the opening end surface of the upper end of the foundation pile 31 is not damaged. It is preferable to be composed of a flexible soft material.

  Next, as shown in FIGS. 2A and 2B, after the driving member 10 is pulled out from the foundation pile 31, the upper end portion 32 protruding from the ground 20 of the foundation pile 31 is covered from above. Attach the cap 41 as shown.

  FIG. 3 is an explanatory view of the main part of FIG. The cap 41 has a ring-shaped disk 42 and a hanging piece 43 that hangs down from the outer peripheral edge thereof. When the cap 41 is attached to the upper end portion 32 of the foundation pile 31, the disk 42 is positioned on the opening end surface of the upper end of the foundation pile 31, and the hanging piece 43 extends along the outer peripheral surface of the upper end portion 32 of the foundation pile 31. It attaches to the foundation pile 31 so that it may be located. As a result, the opening end surface of the upper end of the foundation pile 31 that is pressed against the wide portion 11 of the driving member 10 and easily damaged is covered with the cap 41, and the occurrence of rust near the opening end surface due to rainwater or the like is suppressed, and rust is generated. Even if it does, it can be made difficult to see from the outside.

  The cap 41 has a through hole 44 that connects the upper space of the foundation pile 31 and the external space outside the foundation pile 31 in a state of being attached to the upper end portion 32 of the foundation pile 31. A groove 45 that opens downward is formed by the side wall surface portion 44 a of the through hole 44, the disc 42, and the hanging piece 43. The width D4 in the lateral direction of the groove 45 is sufficiently larger than the thickness D5 of the foundation pile 31.

  With this configuration, the cap 41 can be reliably attached to the upper end portion 32 of the foundation pile 31 even if the opening end surface of the upper end of the foundation pile 31 is crushed or deformed in the driving step.

  Next, as shown in FIG. 2C, the support column 50 of the installation object is inserted through the through hole 44 into the upper space in the foundation pile 31. Subsequently, as shown in FIG. 2 (d), a filler (such as liquid cement mortar) is filled in the upper space in the foundation pile 31 so as to fill a gap (cavity) between the support column 50 and the foundation pile 31. The upper space in the foundation pile 31 is filled with a filler. The support 50 can be firmly erected on the ground 20 by curing the filler filled in the upper space.

  In the above, generally, the filling process by the foundation pile 31 and the insertion process of the support column 50 are often performed in parallel, but the filling member 10 is pulled from the foundation pile 31 at the filling time of the filler. If it is after it has been removed, it may be performed at any timing within the range of work support.

  FIG. 4 is an explanatory view of the main part of FIG. 2 (d), and is a longitudinal sectional view of the main part near the center before filling the foundation pile 31 with the filler, and FIG. 5 is the main part of FIG. 4. FIG. The through hole 44 of the cap 41 has a tapered portion 47 that gradually decreases in diameter toward the lower end 46 of the opening.

  With this configuration, when the column 50 is inserted into the foundation pile 31 through the through hole 44, the column 50 is guided to the opening lower end 46 side even if the lower end of the column 50 contacts the surface of the tapered portion 46. Further, the column 50 inserted into the foundation pile 31 is restricted in movement in the lateral direction by the lower end 46 of the opening. With this configuration, the horizontal alignment operation of the support column 50 is facilitated. In this embodiment, the lower open end 46 of the through hole 44 has a circular shape in plan view, and is formed in the center portion in plan view of the cap 41, so that the column 50 can be easily guided to the center portion in plan view of the foundation pile 31. .

  FIG. 6 is an explanatory diagram of the main part of FIG. 2D, and is a longitudinal sectional view of the main part near the center after the filler 60 is filled in the foundation pile 31. The filling material 60 fills the upper space in the foundation pile 31 and fills the inside of the through hole 44 through the lower opening end of the taper portion 47. In this embodiment, the filling material 60 is filled up to the upper end of the cap 41 and solidified. Yes.

  With this configuration, even if the cap 41 is to be pulled upward, it is blocked by the filler 60 solidified in the internal space of the taper portion 47, so that the top of the cap 41 can be obtained without using a fixing tool such as a screw. Directional movement is prevented.

  Further, an inclined surface portion 48 having a gradually decreasing diameter toward the lower end is also formed on the outer side of the through hole 44. With this configuration, when the foundation pile 31 is filled with the filler 60, the filler 60 is easily filled between the foundation pile 31 and the inclined surface portion 48. Further, since the width D4 of the groove portion 45 of the cap 41 is sufficiently larger than the thickness D5 of the foundation pile 31, the cap 41 is easy to move in the lateral direction, but this lateral movement is also limited. In combination with the effect of the tapered portion 47, the cap 41 can be firmly fixed to the foundation pile 31.

  As described above, the foundation pile cap of the present embodiment is a cap 41 that is attached to the upper end portion 32 of the tubular foundation pile 31 embedded in the ground 20, and is suspended from the ring-shaped disk 42 and its outer periphery. A piece 43 and a through-hole 44 that communicates the upper space of the foundation pile 31 and the external space outside the foundation pile 31 in a state of being attached to the upper end 32 of the foundation pile 31; The upper end portion 32 of the foundation pile 31 is covered with the side wall surface portion of the through hole 44, and the through hole 44 has a tapered portion 47 that gradually decreases in diameter toward the lower end of the opening 46. .

  With this configuration, the filler 41 is filled in the internal space of the taper portion 47, so that the cap 41 can be fixed to the foundation pile 31 without a fixing tool such as a screw. In addition, it is possible to guide the column 50 to a predetermined position with respect to the foundation pile 31 in a range where the column 50 can pass through the opening lower end 46 of the tapered portion 47.

  As described above, the column installation method according to the present embodiment is a column installation method in which the column 50 is inserted into the cylindrical foundation pile 31 embedded in the ground and is erected, and the upper end portion 32 of the foundation pile 31. Provided in the cap 41, an embedding step (FIG. 2A) for embedding in a state protruding from the ground 20, a cap step (FIG. 2B) for attaching the cap 41 to the upper end 32 of the foundation pile 31. The insertion step of inserting the column 50 into the through-hole 44 having a tapered portion 47 that gradually decreases in diameter toward the lower end 46 of the opening while communicating the upper space of the foundation pile 31 and the external space outside the foundation pile 31 (FIG. 2 (c)) and a filling step (FIG. 2 (d)) for filling the inside of the foundation pile 31 and the internal space of the tapered portion 47 with the filler 6.

  With this configuration, when the support column 50 is inserted into the foundation pile 31, the insertion position of the support column 50 is guided to the opening lower end 47 of the taper portion 47 in plan view so that the support column 50 is inserted. After that, the column is hardly tilted by being restricted by the opening lower end 47, so that the column erecting operation becomes easy.

  As mentioned above, although the installation method of the cap for foundation piles and support | pillar of this invention was demonstrated based on embodiment, this invention is not limited to these embodiment. The present invention includes various modifications made by those skilled in the art without departing from the scope of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be widely used in the case where a pillar is installed on a foundation pile to which the pillar is erected on the ground and the foundation pile to which the cap is attached.

DESCRIPTION OF SYMBOLS 10 Driving member 11 Wide part 12 Narrow part 13, 14 Bar material 20 Ground 30 Tool 31 Foundation pile 32 Upper end part 33 Opening 41 Cap 42 Flat plate 43 Hanging piece 44 Through hole 44a Side wall surface part 45 Groove part 46 Opening lower end 47 Taper part 48 Inclination Surface 50 Strut 60 Filler

Claims (2)

A cap attached to the upper end of a tubular foundation pile embedded in the ground,
A ring-shaped disk, a hanging piece that hangs down from the outer periphery thereof, and a through hole that communicates the upper space of the foundation pile and the external space outside the foundation pile in a state of being attached to the upper end of the foundation pile,
The upper end portion of the foundation pile is covered with the disk, the hanging piece, and the side wall surface portion of the through hole,
The said through-hole has a taper part which becomes a small diameter gradually toward an opening lower end, The cap for foundation piles characterized by the above-mentioned. A support installation method for installing a support pillar on a foundation pile to which the cap according to claim 1 is attached,
An embedment process in which the upper end of the foundation pile projects from the ground;
Attaching a cap to the upper end of the foundation pile;
An insertion step of inserting a column into a through-hole having a tapered portion that gradually decreases in diameter toward the lower end of the opening while communicating with the upper space of the foundation pile and the external space outside the foundation pile provided in the cap;
And a filling step of filling the interior space of the foundation pile and the tapered portion with mortar.

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