JP2011140753A - Structure for connecting wooden pile and steel pipe pile together - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure for connecting a wooden pile and a steel pipe pile together, which enables the wooden pile to be used for ground reinforcement, without providing counter-measures against decay. <P>SOLUTION: This structure for connecting the wooden pile and the steel pipe pile together is characterized as follows: the upper end of the wooden pile is provided with a slit; and a vertical plate is formed at the lower end of the steel pipe pile, and fitted and inserted into the slit, so that the wooden pile and the steel pipe pile can be connected together. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a connection structure of a wooden pile and a steel pipe pile that connects the wooden pile and the steel pipe pile to reinforce the ground as a single support pile.

Conventionally, when a ground of a structure such as a house is reinforced by a support pile, a steel pipe pile or a concrete pile is used as the support pile.
However, in recent years, in order to respond to environmental problems and global warming problems, wooden support piles (wood piles) that are much cheaper than steel pipe piles and concrete piles and are environmentally friendly because they are natural materials. Demand is growing.

  In addition, wooden piles are light in weight, so they are easy to construct and have the advantage that the quality does not change below the groundwater level where they do not touch the air.

However, wooden piles may decay due to contact with air above the groundwater level fluctuation zone or above the groundwater level, which may reduce strength.
Therefore, when using wooden stakes, it is necessary to take anti-corrosion measures such as applying chemicals to prevent decay, but since the anti-corruption measures are taken at factories and the like, it is costly.

  An object of this invention is to provide the connection structure of a wooden pile and a steel pipe pile which can use a wooden pile for ground reinforcement, without taking a countermeasure against decay.

1st invention of this application made in order to achieve the said objective is a connection structure of a wooden pile and a steel pipe pile, Comprising: A slit is formed in the upper end of the said wooden pile, a vertical board is provided in the said steel pipe pile, The said slit A connecting structure of a wooden pile and a steel pipe pile is provided, wherein the vertical plate is inserted and connected to each other.
2nd invention of this application WHEREIN: In the connection structure of the wooden pile and steel pipe pile of 1st invention, the said slit and the said vertical board are formed in planar view Y shape, The connection of a wooden pile and a steel pipe pile characterized by the above-mentioned. Provide structure.
3rd invention of this application is the connection structure of the wooden pile and the steel pipe pile of the 1st invention or the 2nd invention, the said vertical plate is provided in the inside of the said steel pipe pile, the said wooden pile is inserted in the said steel pipe pile, Provided is a connection structure between a wooden pile and a steel pipe pile, characterized by connecting the wooden pile and the steel pipe pile.

The present invention can obtain at least one of the following effects by means for solving the above-described problems.
<1> By connecting wooden piles and steel pipe piles, the steel piles are used only for the upper part of the groundwater level fluctuation area and the groundwater level that may be corrupted by wooden piles. The ground reinforcement structure can be made.
<2> Since the vertical plate of the steel pipe pile is fitted and fixed to the slit of the wooden pile, the rotational force acting on the steel pipe pile is also transmitted to the wooden pile. For this reason, it is possible to cope with not only press-fitting but also driving by rotary press-fitting.
<3> Since the vertical plate formed on the steel pipe pile is inserted into and fixed to the slit of the wooden pile, the ground reinforcement structure having bending strength can be obtained.

Explanatory drawing of the ground reinforcement structure by the connection structure of the wooden pile and steel pipe pile concerning the present invention Explanatory drawing of the connection structure of the wooden pile and steel pipe pile concerning the present invention Explanatory drawing of the connection structure of the wooden pile and steel pipe pile concerning other examples

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

<1> Overall Configuration The wood pile and steel pipe pile connection structure of the present invention connects the wood pile 1 and the steel pipe pile 2 with substantially the same diameter to form a single support pile.
The connection structure of the wooden pile and the steel pipe pile of the present invention is formed by inserting a vertical plate 21 provided in the steel pipe pile 2 into the slit 11 formed in the wooden pile 1. (Figure 1)

<2> Wooden pile The wooden pile 1 is a columnar pile made of wood such as cedar and pine.
The wooden pile 1 is located below the steel pipe pile 2 in the ground.
A slit 11 is formed at the upper end of the wooden pile 1.
Since the wooden pile 1 is made of wood, the slits 11 can be easily formed.

<3> Steel pipe pile The steel pipe pile 2 is a pile made of a steel pipe.
The steel pipe pile 2 is located above the wooden pile 1 in the ground.
A vertical plate 21 is protruded from the lower end of the steel pipe pile 2 by welding or the like.

<4> Shape of slit and vertical plate The vertical plate 21 of the steel pipe pile 2 is inserted into the slit 11 of the wooden pile 1.
The vertical plate 21 has a thickness that can be inserted into the slit 11, and the height of the vertical plate 21 is approximately the same as the depth of the slit 11.
The shapes of the slit 11 and the vertical plate 21 are formed in a single letter shape in plan view (FIG. 2a) or a Y shape in plan view (FIG. 2b).
Since the vertical plate 21 similarly projecting in the axial direction is inserted and connected to the slit 11 recessed in the axial direction, the slit and the vertical plate 21 act as a guide at the time of connection and act on the steel pipe pile 2 positioned above. The rotating force is transmitted to the lower wooden pile 1 as well.
For this reason, the wooden pile 1 and the steel pipe pile 2 can be connected easily, and when placing on the ground, not only the press-fitting but also the placement by rotary press-fitting can be performed.
Moreover, since the horizontal force concerning one pile is transmitted also to the other pile by inserting and connecting, bending strength can be provided to a connection part.

<5> Fixing wooden pile and steel pipe pile Bolt hole 12 is formed in wooden pile 1 so as to pass through almost the center of slit 11 and to be orthogonal, and is inserted into slit 11 at the substantially center of vertical plate 21. The bolt hole 22 is formed so as to be continuous with the bolt hole 12, the bolt 3 is inserted into the bolt holes 12, 22 with the vertical plate 21 being inserted into the slit 11, and the nut 4 is inserted into the inserted bolt 3. Are screwed and the wooden pile 1 and the steel pipe pile 2 are fixed.
When the wooden pile 1 and the steel pipe pile 2 are fixed and integrated, when the upper steel pipe pile 2 is pulled upward, the lower wooden pile 1 is also lifted upward. Therefore, not only placing but also drawing can be performed.

<6> Ground reinforcement structure The wooden pile 1 and the steel pipe pile 2 penetrate into the ground and reinforce the ground as an integral support pile, but the wooden pile 1 is placed deeper than the groundwater level, and the groundwater level fluctuation area and groundwater The steel pipe pile 2 is arranged above the position. (Figure 1)
Since the wooden pile 1 does not come into contact with the air below the groundwater level, it does not need to be rotted.
However, if the wooden pile 1 is arranged in the groundwater level fluctuation region or in the upper part thereof, it may be decayed by touching the air, so that decay processing is necessary.
Therefore, by placing steel pipe piles 2 that do not decay above the groundwater level fluctuation area and the groundwater level, while using cheap and environmentally friendly wooden piles, the ground reinforcement structure that is stable in quality as a whole Can be built.

[Other Examples]
In the said Example, although the upper end of the wooden pile 1 and the lower end of the steel pipe pile 2 were connected, you may insert the wooden pile 1 in the steel pipe pile 2, and may connect. (Figure 3)
At this time, the wooden pile 1 has a diameter that can be inserted into the steel pipe pile 2, and the vertical plate 21 is provided inside the steel pipe pile 2.
And the wooden pile 1 is inserted from the lower end of the steel pipe pile 2, the vertical board 21 is inserted in the slit 11, and the wooden pile 1 and the steel pipe pile 2 are connected.
Since the upper end of the wooden pile 1 is inserted into the steel pipe pile 2, the horizontal force acting on the wooden pile 1 is dispersed in the circumferential portion of the steel pipe pile 2. Further, the horizontal force acting on the steel pipe pile 2 is also distributed to the shaft portion of the wooden pile 1. For this reason, a ground reinforcement structure with a large bending strength can be constructed.
When comprised in this way, you may provide the bolt hole 22 in the steel pipe pile 2 so that the bolt hole 12 of the wooden pile 1 may be followed. Thereby, the force acting on the bolt hole 22 is distributed to the steel pipe pile 2. In this case, if the length for inserting the wooden pile 1 into the steel pipe pile 2 is longer than the vertical plate 21, the bolt hole 22 of the vertical plate 21 is unnecessary, and the bolt hole 12 of the wooden pile 1 also penetrates the slit 11. There is no need.

1 .... wood pile 11 ... slit 12 ... bolt hole 2 ... steel pipe pile 21 ... vertical plate 22 ... bolt hole 3 ... bolt 4 ... nut

Claims (3)

It is a connection structure of wood pile and steel pipe pile,
A slit is provided at the upper end of the wooden pile,
Forming a vertical plate at the lower end of the steel pipe pile;
The vertical plate is inserted and connected to the slit,
Connection structure of wood pile and steel pipe pile.   The connection structure of a wooden pile and a steel pipe pile according to claim 1, wherein the slit and the vertical plate are formed in a Y shape in a plan view.   The connection structure of the wooden pile and steel pipe pile of Claim 1 or Claim 2 WHEREIN: The said vertical plate is provided in the inside of the said steel pipe pile, the said wooden pile is inserted in the said steel pipe pile, and the said wooden pile and the said steel pipe A connecting structure of wooden piles and steel pipe piles, characterized by connecting piles.

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