JP2004107897A - Unrigid joint method of pile head of small calibered steel pipe pile in housing foundation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a unrigid joint method of a pile head of a small calibered steel pipe pile in a housing foundation capable of preventing the damage of a foundation in a joint section of the small calibered steel pipe pile having a vertical load by taking a horizontal force occurring in an earthquake as base isolation. <P>SOLUTION: In foundation work as that for the small calibered steel pile in the housing foundation, the joint method is so performed that a pile head cap (2) having wing pieces (2a, 2b and 2c) with circumference bent in the vertical and horizontal directions is crowned on the pile head (1) and that upper surfaces of piles are arranged at the lower end of a footing (3) to carry out the work. A plurality of piles (X) as the small calibered steel pipe piles are driven, and the footing (3) is constructed on the line, and the pile head cap (2) is crowned on the pile head (1), a form (Y) is assembled from above, reinforcing bars are arranged, and concrete is placed to constitute the footing. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a non-rigid treatment method for a pile head of a small-diameter steel pipe pile in a housing foundation.
[0002]
[Prior art]
Conventionally, residential land was laid, the ground was soft, and the foundation work was sometimes performed before the soil was firmly tightened.The house that had been built was tilted or damaged due to uneven settlement of the ground. I often hear cases of collapse.
[0003]
For this reason, piles are driven from the ground to the underground rock, and a foundation is provided on these piles for construction. As shown in FIGS. 5 to 8, A, B, C, and D, four types of methods are performed.
[0004]
That is, the A type is a method of embedding the pile diameter or more in the footing. The B type is a method in which a spiral rebar is set up from inside a steel pipe and resists as a virtual reinforced concrete column. The C type is a method in which a steel pipe and a footing rebar are connected, and a horizontal force is transmitted to the footing rebar to resist the entire footing. The D type is a method of embedding about 50 mm in the footing.
[0005]
However, in any of these methods, when an earthquake occurs, the horizontal force generated is transmitted to the pile head by an engaging means between the pile head and the footing of the foundation, Will destroy the foundation of the joint.
[0006]
[Problems to be solved by the invention]
Therefore, the present invention provides a pile head of a small diameter steel pipe pile in a housing foundation that can prevent the foundation from being damaged at a joint portion of the small diameter steel pipe pile subjected to a vertical load by seismically isolating a horizontal force generated during an earthquake. To develop and provide a non-rigid treatment method.
[0007]
[Means for Solving the Problems]
The present invention relates to a small-diameter steel pipe pile-based soil business in a housing foundation, in which a pile head is covered with a pile head cap having wing pieces whose outer periphery is bent upward, downward, and horizontally, and the pile head cap is interposed. This is a non-rigid treatment method for the pile head of small diameter steel pipe piles in a housing foundation, characterized in that the pile top is aligned with the footing lower end.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3. In the small-diameter steel pipe pile-based ground work in a housing foundation, the outer periphery of a pile head (1) is upward, downward, and horizontal. And a pile head cap (2) having bent wing pieces (2a, 2b, 2c), respectively, is covered, and the pile top end is aligned with the footing (3) lower end via the pile head cap. It is a non-rigid treatment method for pile head of small diameter steel pipe pile in house foundation.
[0009]
As shown in FIG. 4, the pile (X) is a small-diameter steel pipe pile, into which a plurality of piles are driven and on which a footing (3) is constructed. A pile head cap (2) is covered, a formwork (Y) is assembled from above, a reinforcing bar (Z) is arranged, and concrete is cast to form a footing.
[0010]
The order of construction and the construction means are not particularly limited.
[0011]
【The invention's effect】
According to the invention, the pile (X) and the footing (3) are installed via the pile head cap (2), and when the pile shakes horizontally during an earthquake, the pile head cap (2) is broken. The pile head cap (2) is fixed to the footing (3), but the pile (X) is merely placed on the pile head cap (2). This is an extremely effective effect such as not damaging the foundation at the joint of the pile.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an embodiment of the present invention.
FIG. 2 is a plan view showing one embodiment of a pile head cap used in the present invention.
FIG. 3 is a front view showing one embodiment of a pile head cap used in the present invention.
FIG. 4 is a sectional view showing an embodiment of a pile head cap used in the present invention.
FIG. 5 is an explanatory diagram of a conventional example.
FIG. 6 is an explanatory diagram of a conventional example.
FIG. 7 is an explanatory diagram of a conventional example.
FIG. 8 is an explanatory diagram of a conventional example.
[Explanation of symbols]
Reference Signs List 1 pile head 2 pile head cap 2a, 2b, 2c wing piece 3 footing X pile Y formwork Z steel bar

Claims (1)

In the small-diameter steel pipe pile-based ground work in a housing foundation, a pile head cap having a wing piece whose outer periphery is bent upward, downward, and horizontally is covered on a pile head, and the pile top is footed through the pile head cap. Non-rigid treatment method for pile heads of small diameter steel pipe piles in residential foundations, characterized in that they are aligned at the lower end.

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