JP5683927B2 - Pile press-fitting method and underground obstruction member - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a method of pressing a pile by bringing an underground obstacle such as a stone and the like, and an underground obstacle moving member used for the method.

  For example, piles are built on a stratum formed of crushed stones, cobblestones, etc., using a method of pressing a pile with a pile presser after taking the stone and a pile presser equipped with an auger device. A method of press-fitting a pile while cutting it with an auger (for example, see Patent Document 1), and a method of press-fitting a pile while cutting a stone with a cutter using a pile press-in machine equipped with a cutter device (for example, see Patent Document 2) There is.

JP 2005-299143 A JP 2001-152453 A

  However, the method of removing stones when press-fitting piles has a lot of incidental work, and the construction period is long. Also, there is a problem that there is a lot of useless work because it collapses unless it is largely removed.

  Moreover, the method of press-fitting a pile while cutting a stone has a problem that a harder stone requires more time and consumables to cut.

  An object of the present invention is to enable the press-fitting of piles by efficiently bringing underground obstacles regardless of the size and hardness of underground obstacles such as stones.

In order to solve the above-mentioned problems, the invention according to claim 1 is configured to lower a tubular pile held by a pile presser moving along an existing pile connected to the ground while rotating, press-fitting the pile into the ground by juxtaposed to the existing pile, a pile press-fit method using the pile press-fitting machine, the underground obstacle pulling member having a polygonal pyramid shaped portion at the tip of the polygonal prism portion It is connected to the tip of the tubular pile with a pile gripping device, and the underground obstacle moving member is pushed in while rotating with respect to the underground obstacle. A space for entering a pile is formed by bringing an obstacle close to the periphery, and the tubular pile is continuously press-fitted into the space.

Invention of Claim 2 is the pile press-fit method of Claim 1 , Comprising: It protrudes from the front-end | tip of the said polygonal pyramid-shaped part inside the said underground obstacle gathering member, and crushes underground obstacles A breaker is incorporated, and the underground obstacle moving member is rotated and pushed in while the underground obstacle is split by driving the breaker with respect to the underground obstacle.

The invention according to claim 3 is the pile press-in method according to claim 1 or 2 , wherein a blade projecting around the polygonal pyramid-shaped portion is provided, and the underground is brought close to the periphery by the polygonal pyramid-shaped portion The blades are inserted into the gaps between the obstacles, and the underground obstacles are moved to the surroundings by the rotation of the blades.

The invention according to claim 4 is an underground obstacle moving member provided with a polygonal pyramid shape portion at the tip of the polygonal column shape portion, comprising a pile gripping device connected to the tip of the tubular pile. .

The invention according to claim 5 is the underground obstacle gathering member according to claim 4 , wherein a breaker that protrudes from the tip of the polygonal pyramid shape portion and crushes the underground obstacle is incorporated therein. It is characterized by that.

A sixth aspect of the present invention is the underground obstacle gathering member according to the fourth or fifth aspect , wherein the member is provided with blades protruding around the polygonal pyramid shape portion.

  According to the present invention, regardless of the size and hardness of the underground obstacle, the pile can be press-fitted by bringing the underground obstacle efficiently.

1 shows an embodiment to which the present invention is applied, and is a longitudinal sectional view showing an underground obstacle approach just before pile press-fitting. It is the perspective view which expanded and showed the underground obstruction member of FIG. FIG. 1A shows the action of the underground obstruction member in FIG. 1, and FIG. 1A shows the insertion of the triangular pyramid-shaped part, and FIG. 2B shows the action of the underground obstacle being moved around. (C) which showed the state which formed the space where a underground obstacle was approached by the triangular prism shape part, and the pile entered. FIG. 6 is a longitudinal sectional view of a main part showing Embodiment 2. It is the side view (a) of the underground obstacle gathering member of FIG. 4, and the figure (b) which showed the effect | action by the blade | wing.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
FIG. 1 shows an underground obstruction just before pile press-in as an embodiment to which the present invention is applied. Reference numeral 1 denotes a pile press-in machine, 2 is a steel pipe pile, and 3 is an underground obstruction close-up member.

  As shown in the figure, an underground obstruction member 3 is connected to and integrated with the lower end of the steel pipe pile 2 held vertically by the pile press-in machine 1.

  The underground obstacle gathering member 3 is made of steel, and has a configuration in which a triangular prism-shaped portion 5 is formed on a triangular pyramid-shaped portion 4 at the lower end as shown in an enlarged view in FIG.

  The underground obstacle gathering member 3 includes a pile gripping device 6 as shown in FIG. 4, for example, and is connected to the inside of the lower end of the steel pipe pile 2 through the pile gripping device 6. Note that the pile gripping device 6 is fixed to the inner peripheral surface of the steel pipe pile 2 with a gripping claw that expands by driving a hydraulic cylinder.

  At the time of pile press-fitting, as shown in FIG. 1, the underground obstruction member 3 at the lower end of the steel pipe pile 2 held vertically by the pile presser 1 moving along the already-placed steel pipe pile 2. Insert into underground obstacles. At this time, the underground obstacle approaching member 3 integrally with the steel pipe pile 2 rotated or swinged by the pile press-fitting machine 1 also descends while rotating or swinging as shown by the arrows in FIG. .

  FIG. 3 shows the action of the underground obstacle gathering member 3. As shown in FIG. 3 (a), the triangular pyramid shaped portion 4 at the lower end of the underground obstacle gathering member 3 is a stone of the underground obstacle. The stone is pushed to the periphery by being pushed into the gap and rotating or swinging the triangular pyramid shaped portion 4.

  Then, as the triangular pyramid-shaped portion 4 descends, as shown in FIG.

Thereafter, the triangular prism-shaped part 5 is inserted into the underground obstacle following the triangular pyramid-shaped part 4, and a space into which the steel pipe pile 2 is inserted is formed as shown in FIG.
Therefore, the steel pipe pile 2 is smoothly press-fitted into the underground obstacle following the underground obstacle gathering member 3.

  As described above, if the underground obstacle gathering member 3 of the embodiment is used, regardless of the size or hardness of the stone, the stone is efficiently gathered and piled by the polygonal pyramid shape portion 4 and the subsequent polygonal column shape portion 5. Can be press-fitted.

  In the above embodiment, the triangular prism shape portion and the triangular pyramid shape portion are used. However, the present invention is not limited to this, and may be a polygonal shape such as a quadrangle.

(Embodiment 2)
FIG. 4 shows Embodiment 2, as in Embodiment 1 described above, 2 is a steel pipe pile, 3 is an underground obstruction member, 4 is a polygonal pyramid shaped part, 5 is a polygonal column shaped part, and 6 is a pile. A gripping device, 7 is a breaker, and 8 is a blade.

  That is, the second embodiment incorporates a breaker 7 that protrudes from the tip of the polygonal pyramid-shaped portion 4 and crushes the stone in the underground obstacle gathering member 3 similar to the first embodiment, as shown in the figure.

  Further, as shown in FIG. 5A, the blades 8 projecting around the polygonal pyramid-shaped portion 4 are integrally formed.

  In this manner, by incorporating the breaker 7 that protrudes from the tip of the polygonal pyramid-shaped portion 3 and breaks the stone into the underground obstacle gathering member 3, the stone is broken by driving the breaker 7 as shown in the figure. The underground obstacle gathering member 3 can be pushed in.

  Further, by providing the blades 8 projecting around the polygonal pyramid-shaped portion 3, the blades 8 are inserted into the gaps of the stone brought to the periphery by the polygonal pyramid-shaped portion 3 as shown by arrows in FIG. , Stone removal efficiency can be increased.

In the above embodiment, the object is a stone, but the present invention is not limited to this, and can be applied to any other underground obstacle such as a concrete piece.
In addition, the configuration of the pile gripping device, the shape of the blades, and the like are arbitrary, and it is needless to say that specific detailed structures and the like can be appropriately changed.

DESCRIPTION OF SYMBOLS 1 Pile press-in machine 2 Steel pipe pile 3 Underground obstacle gathering member 4 Polygonal cone-shaped part 5 Polygonal column-shaped part 6 Pile gripping device 7 Breaker 8 Blade

Claims (6)

Lowering the tubular pile held by the pile presser moving along the existing pile connected to the ground while rotating it, and juxtaposing the pile into the existing pile and press-fitting the pile into the ground, A pile press-in method using a pile press-in machine,
Connect the underground obstacle gathering member having a polygonal pyramid shape portion at the tip of the polygonal column shape portion to the tip of the tubular pile with a pile gripping device,
The underground obstacle gathering member is pushed in while rotating with respect to the underground obstacle, and a space for entering the pile is formed by bringing the underground obstacle to the periphery by the polygonal pyramid shape portion at the tip and the subsequent polygonal column shape portion. And the pile press-fit method characterized by pressing the said tubular pile into the space continuously . Incorporating a breaker that crushes underground obstacles protruding from the tip of the polygonal pyramid shape part inside the underground obstacle gathering member,
The pile press-fitting method according to claim 1, wherein the underground obstacle moving member is rotated and pushed in while breaking the underground obstacle by driving the breaker with respect to the underground obstacle . Providing a blade projecting around the polygonal cone-shaped part,
Insert the blades into the gaps of underground obstacles that are brought to the periphery by the polygonal pyramid shape part,
The pile press-in method according to claim 1 or 2, wherein an underground obstacle is brought to the surroundings by rotation of the blade .   An underground obstacle gathering member having a polygonal pyramid shape portion at the tip of the polygonal column shape portion,
  An underground obstacle gathering member comprising a pile gripping device connected to the tip of a tubular pile. The underground obstacle gathering member according to claim 4, wherein a breaker that protrudes from a tip of the polygonal pyramid shape portion and crushes the underground obstacle is incorporated therein . The underground obstruction member according to claim 4 or 5, further comprising a blade projecting around the polygonal pyramid shape portion .

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