JP2003129472A - Anchor foundation pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor foundation pile for reinforcing soft ground by providing an anchor plate projecting outwardly from a peripheral surface of a steel pipe in a radial direction. SOLUTION: The anchor foundation pile is provided with an anchor plate 8 projecting outwardly from the peripheral surface of a steel pipe 1 in a radial direction. The anchor foundation pile comprises the steel pipe 1 to which a bottom plate 2 having projecting blades 3, 4 is welded at the lower end of the steel pipe 1, a plate insertion opening 5 formed in a periphery of a part of the steel pipe 1 which is buried in the ground, the anchor plate 8 fit into the plate insertion opening 5 to be freely projectable outwardly from the peripheral surface of the steel pipe 1 in the radial direction, and a plate push-out mechanism for pushing the anchor plate 8 to project.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor foundation pile that is driven into a foundation for strengthening bearing capacity on soft ground at a construction site.

[0002]

2. Description of the Related Art Conventionally, at a construction site, a steel pipe is buried to reinforce the ground for strengthening the bearing capacity in soft ground. However, in order to completely reinforce the soft ground, the steel pipe must be made thicker or
Since it was necessary to take measures to lengthen the steel pipe, there were problems such as an increase in manufacturing cost and working time. Therefore, the applicant of the present application discloses, as Japanese Patent Application No. 2000-334125, a steel pipe having a cap welded to its tip, a plurality of pin holes formed in the peripheral surface of the steel pipe embedded in the ground, and the pin hole. An anchor foundation pile comprising an anchor pin which is fitted to the outer peripheral surface of the steel pipe so as to be protruded radially outward from the peripheral surface of the steel pipe, and a pin push-out mechanism for causing the anchor pin to protrude.

[0003]

DISCLOSURE OF THE INVENTION The present invention is a further improvement of the above-mentioned patent application. An anchor base for reinforcing soft ground by providing an anchor plate protruding radially outward from the peripheral surface of a steel pipe is provided. Intended to provide piles.

[0004]

To this end, the anchor foundation pile of the present invention is provided with an anchor plate protruding radially outward from the peripheral surface of the steel pipe. Also,
The anchor foundation pile of the present invention is a steel pipe pipe to which a bottom plate having a protruding blade at the lower end is welded, a plate hole formed in the peripheral surface embedded in the ground of the steel pipe pipe, and fitted into the plate hole. And an anchor plate that can project radially outward from the peripheral surface of the steel pipe, and a plate pushing mechanism that causes the anchor plate to project.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the anchor foundation pile of the present invention has a circular bottom plate 2 welded to the lower end of a steel pipe 1 to close it, and the bottom plate 2 has a vertical projection projecting downward on a straight line passing through the center. The blade 3 is fixed, and the inclined protruding blades 4 that are inclined in opposite directions are fixed on the straight lines passing through the center in the direction orthogonal to the vertical protruding blades 3. The vertical projecting blade 3 and the slanting projecting blade 4 are each formed of a steel plate having a predetermined thickness in order to maintain the excavation strength, and are fixed to the bottom plate 2 by welding.
Plate holes 5 having rectangular openings are formed in the upper and lower sides in a 180 ° symmetrical direction of a peripheral surface embedded in the ground of the steel pipe 1, and the openings of the plate holes 5 are reinforced by an upper reinforcing plate 6 and a lower reinforcing plate 7. An anchor plate 8 is housed through the gap between the upper reinforcing plate 6 and the lower reinforcing plate 7 so as to project radially outward from the peripheral surface of the steel pipe 1. Further, inside the steel pipe 1, a plate pushing mechanism (not shown) for projecting the anchor plate 8 is incorporated.

The anchor plate 8 is a steel pipe 1
As shown in the plan view of FIG. 2 (a), the length is such that it can be protruded radially outward from the peripheral surface and is stored in the steel pipe 1 and is formed of a steel plate, and the tip of the steel pipe 1 is It has a tongue shape formed in the same manner as a circular arc, and is provided at the rear end with a vertically protruding flange 9 formed in the same manner as the circular arc of the steel pipe 1. As shown in the side view of FIG. 2B, the lower portion of the anchor plate 8 of the flange 9 is cut out so as to fit with a guide plate 10 described later, and a groove 12 is formed.

The steel pipe 1 is, as shown in FIG.
Rectangular plate holes 5 are formed at the same height of the flanges 9 in the 180 ° symmetrical direction of the peripheral surface buried in the ground, and as shown in FIG. 3, inside the steel pipe 1, the plate is formed. A semicircular guide plate 10 is welded and fixed at a height position of the hole 5 so that the anchor plate 8 can be placed so as to face each other in a direction orthogonal to the plate hole 5. Then, the groove 12 of the anchor plate 8 is fitted into the guide plate 10 through the plate hole 5 and is inserted into the steel pipe 1 with the flange 9 side as the leading end, and then a rectangular steel plate is bent and curved to form an upper reinforcing plate. 6 and the lower reinforcing plate 7 are welded and fixed at an interval larger than the thickness of the anchor plate 8 to reinforce the opening of the plate hole 5, and one round of the steel pipe pipe is provided through the gap between the upper reinforcing plate 6 and the lower reinforcing plate 7. The anchor plate 8 is allowed to project radially outward from the surface. Therefore, as shown in FIG. 4, the anchor plate 8 can be moved from the state in which the one-dot chain line is stored to the state in which the one-dot chain line is projected, and as shown in FIG. It can be stored in the steel pipe 1 in a mounted state. Note that the upper anchor plate 8 in FIG. 5 is a vertical cross-sectional view taken along the arrow DD, and the lower anchor plate 8 is a vertical cross-sectional view taken along the arrow DD in the retracted state.

Further, as shown in FIG. 3, a plate pushing mechanism 11 is housed between the steel pipe 1 and the flange 9 of the anchor plate 8. The plate pushing mechanism 11 can be configured by using any one of a screw type jack, a pneumatic type jack and a hydraulic type jack. When the steel pipe 1 is buried in the ground, the anchor plate 8 is housed in the steel pipe 1 with the groove 12 fitted and held in the guide plate 10 as shown by the solid line in FIG. After the burying of No. 1 is completed, the flange 9 formed on the anchor plate 8 is pushed outward in the radial direction by the operation of the plate push-out mechanism 11 and abuts on the upper reinforcing plate 6 and the lower reinforcing plate 7, so that the one-dot chain line in FIG. After that, the plate pushing mechanism 11 performs a reverse operation and returns, and the anchor plate 8 is retained and retained as it is while protruding from the peripheral surface of the steel pipe 1.

Next, the construction method of the anchor foundation pile of the present invention will be described. As shown by the solid line in FIG. 3, the anchor plate 8 and the plate pushing mechanism 1 are provided in the steel pipe 1.
After storing No. 1, the steel pipe 1 is buried in the soft ground by a pile driver in the same manner as the conventional method. After the burying is completed, the plate pushing mechanism 11 is operated to push the anchor plate 8 outward in the radial direction, and the anchor plate 8 is projected into the ground through the plate hole 5 as shown in FIG.

When the protrusion of the anchor plate 8 is completed, the plate pushing mechanism 11 is operated in the reverse direction to leave the anchor plate 8 as it is, and the plate pushing mechanism 11 is moved.
Pull back. After the pullback is completed, the plate pushing mechanism 11 is pulled up from the inside of the steel pipe 1. In addition, only the guide plate 10 remains in the steel pipe 1, and all the other members are pulled up and then used for the steel pipe 1 under preparation.

[0011]

[Effect] In the anchor foundation pile of the present invention, by providing an anchor plate that projects radially outward from the peripheral surface of the steel pipe, it is possible to reinforce the soft ground by providing resistance to the sinking or pulling up of the steel pipe. Further, since the anchor plate is projected after the steel pipe is buried, the work is easy, and a pipe having a thick pipe diameter or a long pipe unlike the conventional one is not required, so that the construction cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of an anchor foundation pile of the present invention.

FIG. 2A is a plan view and FIG. 2B is a right side view of an anchor plate of the present invention.

FIG. 3 is a horizontal cross-sectional view of a state where the anchor plate of the present invention is pushed in.

FIG. 4 is a vertical cross-sectional view of the anchor foundation pile of the present invention taken along the line AB in FIG.

5 is a vertical cross-sectional view taken along the line DD of FIG. 1 of the anchor foundation pile of the present invention.

[Explanation of symbols]

1 Steel pipe 2 Bottom plate 3 Vertical protruding blade 4 Inclined protruding blade 5 plate holes 6 Upper reinforcing plate 7 Lower reinforcing plate 8 anchor plate 9 flange 10 Guide plate 11 Plate extrusion mechanism 12 grooves

Claims (2)

[Claims] 1. An anchor foundation pile, comprising an anchor plate protruding radially outward from a peripheral surface of a steel pipe. 2. A steel pipe pipe to which a bottom plate having a protruding blade at its lower end is welded, a plate hole formed in the peripheral surface of the steel pipe pipe embedded in the ground, and a steel pipe pipe fitted into the plate hole. An anchor foundation pile comprising: an anchor plate that is capable of projecting radially outward from the peripheral surface and a plate pushing mechanism that causes the anchor plate to project.