JPH11200367A - Rotary buried hollow pipe pile and its executing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary buried hollow pipe pile to eliminate a need for a large scale mechanical equipment for a burying work and prevent the generation of hammering noise and vibration. SOLUTION: The lower end of a hollow pipe 1 made of a metal is closed. A plurality of screw blades 2, 2... are intermittently spirally wound around the outer peripheral surface of the hollow pipe at intervals of a proper distance throughout an approximate whole surface in the direction of the length thereof. A gap 5 is formed between a starting end part 3 and a terminal end part 4 of the screw blade 2 and the end parts are vertically overlapped with each other and overhang in the direction width. In a so formed rotary buried hollow pipe pile, through screw rotation of the hollow pipe 1 through various rotation means and through operation of the screw blades 2 intermittently spirally wound around the outer peripheral surface thereof intermittently at intervals of a proper distance, the hollow pipe is buried in a ground for construction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary buried hollow pipe pile used as a foundation pile buried in the ground to support a structure such as a building, and a construction method thereof.

[0002]

2. Description of the Related Art Conventionally, various buildings and structures have been constructed by burying concrete or metal foundation piles in the ground. The foundation piles supporting these buildings are made of concrete, metal, or a combination of them, and various piles are manufactured according to the scale of the buildings and the strength of the ground. In consideration of the above, the one provided with a spiral projection on the outer peripheral surface is used.

[0003]

However, the above-mentioned conventionally used foundation pile, especially the spiral projection provided on the outer peripheral surface of the pile main portion extending in the longitudinal direction, is formed by the length of the pile main portion. Since the base pile having spiral projections is formed continuously, the equipment and the process for manufacturing the foundation pile having these spiral projections are not only large-scale, but also a foundation pile having spiral projections. When driving and burying underground, large-scale driving facilities are required, and when demolishing an old building and replacing it with a new one, a similar large scale is required to remove the buried foundation pile. Mechanical equipment was needed.

[0004] In particular, when constructing a building on a relatively narrow land, such as a general residential area, a large-scale casting facility is subject to location restrictions. There are many problems in using conventional foundation piles, which have a great influence on the neighborhood because of noise and vibration. Furthermore, even if the existing building is demolished in the same way as the burial work, it is difficult to pull out the buried foundation piles and it is difficult to remove it, and most of the work remains as it is, reducing the value as vacant land. .

The present invention has been made in view of the above circumstances, and eliminates the need for large-scale mechanical equipment in the burying work, and also prevents the driving noise and vibration, and is easily subject to restrictions on the burying work. A rotary buried hollow pipe that can be easily used for home building and can easily remove piles buried in the ground that is no longer needed when demolishing the building and its construction method It is intended to provide.

[0006]

In order to achieve the above object, a rotary buried hollow pipe pile according to the present invention spirally extends in the width direction on the outer peripheral surface of a metal hollow pipe having a closed end. A plurality of overhanging screw blades are intermittently wound at appropriate intervals in the longitudinal direction thereof and the start and end portions of the screw blades are overlapped and wound with a gap between upper and lower sides. It is characterized by the following.

Further, the rotary buried hollow pipe pile according to the present invention is characterized in that a mounting hole is formed near the upper end of the hollow pipe.

Further, in the method for constructing a rotary buried hollow pipe pile according to the present invention, a plurality of screw blades extending in a width direction in a spiral shape are formed on the outer peripheral surface of a metal hollow pipe having a closed end. Screw rotating a hollow buried hollow pipe pile that is intermittently wound at appropriate intervals in the length direction and overlapped with a gap between the beginning and end of the screw blade with upper and lower gaps. It is characterized by being buried.

[0009]

According to the above-mentioned rotary buried hollow pipe pile according to the present invention, a plurality of screw blades extending in the width direction in a spiral shape on the outer peripheral surface of a metal hollow pipe having a closed end are provided with the same length. The start end and the end of the screw blade are intermittently and intermittently spaced at appropriate intervals in the vertical direction with a gap above and below with a gap between them, and are wound around without being cast. Noise and vibration can be prevented by screwing and burying from the upper end, and it is not necessary to bring in large-scale mechanical equipment for casting work, and it is possible to screw rotate the buried hollow pipe pile Burying work is easily performed in places where working conditions are severe, such as construction in a residential area, as long as there are facilities.

Further, since the screw blade is intermittently wound at appropriate intervals in the longitudinal direction of the outer peripheral surface of the hollow tube, the screw blade can be easily attached to the hollow tube. It is possible to appropriately select the distance between the screw blades and the number of the screw blades to be installed, and it is possible to easily obtain a rotary buried hollow pipe pile having the required strength corresponding to the purpose of use, and It is used in a wide range of fields not only as buildings but also as pillars or foundation piles for structures such as protective fences, guardrails, street lights or various guide boards.

Further, in the rotary buried hollow pipe pile according to the present invention, an attachment hole is formed near the upper end of the hollow pipe so that a reinforcing bar forming a foundation portion installed on the ground surface is inserted. To integrate the foundation and the rotating buried hollow pipe pile, insert the jig of the rotating means when rotating and burying the rotating buried hollow pipe pile in the ground, and attach it, or A connecting tool for connecting and connecting the rotary buried hollow pipe piles is inserted.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a rotary buried hollow pipe pile according to the present invention. FIG. 1 is a front view showing an embodiment of a rotary buried hollow pipe pile, and FIG. 2 is a schematic front view showing an example of the buried state.

The rotary buried hollow pipe pile in this embodiment is:
The lower end of the metal hollow tube 1 made of stainless steel, steel, or the like is closed, and a plurality of screw blades 2, 2,...
Are spirally wound by means of welding or the like and are formed to protrude in the width direction. This screw blade 2
A metal strip plate spirally bent along the outer peripheral surface of the hollow tube 1 has a starting end 3 and a terminating end 4 which form a gap 5 and are overlapped vertically. This gap 5
May be provided at an angle of about 90 degrees with the installation site of the gap 5 between the screw blades 2 wound thereabove (not shown).

The hollow tube 1 is not limited to the one shown in FIG. 1, but may be slightly inclined from the upper end to the lower end as shown in FIG. May be closed as a pointed shape, or the starting end 3 and the terminating end 4 of the screw blade 2 may be formed in a pointed shape.

Further, at the upper end of the hollow tube 1, a mounting hole 6 is formed on the opposite side surface, and as shown in FIG. After forming the foundation 7 on the ground surface
And the concrete 9 is poured and solidified by pouring, whereby the foundation portion 7 and the rotary buried hollow pipe pile are integrated, and the foundation portion can be formed more firmly. The mounting hole 6 also functions as a connecting part when a plurality of rotary buried hollow pipe piles are buried by joining them. For example, one of the connecting parts of the rotary buried hollow pipe pile is enlarged or reduced in diameter. The diameter is inserted into the other rotary buried hollow pipe pile, and a connecting tool is attached to the mounting hole 6 to be connected (not shown).

In the thus-formed rotary buried hollow pipe pile according to the present invention, the hollow pipe 1 is screw-rotated using various means, and the outer peripheral surface thereof is intermittently spirally spaced at appropriate intervals. Buried in the ground by the action of the screw blades 2 wound around the shaft. When removing the hollow buried hollow pipe pile buried in the ground, a similar method is used. The empty tube 1 is pulled out by rotating the screw in the reverse direction. At this time, the mounting hole 6 formed at the upper end of the hollow tube 1 is used as an installation jig of a mechanical means for rotating the screw in the embedding operation or the removing operation (not shown).

[0017]

According to the rotary buried hollow pipe pile of the present invention having the above-described structure, a screw blade that protrudes in the width direction in a spiral shape on the outer peripheral surface of a metal hollow pipe having a closed end is provided. A plurality of which are intermittently wound at appropriate intervals in the longitudinal direction thereof and the starting end and the end of the screw blade are overlapped and wound with a gap between upper and lower sides, and during rotation embedding. The hollow pipe pile is buried by rotating the screw from the upper end side without casting, so that noise and vibration generated by casting are prevented, and large-scale mechanical equipment for casting work is brought in. Is not required, and the burial work is performed with a small-scale facility that rotates the rotary buried hollow pipe pile with a screw, so that the burial work can be easily performed in a general residential area where working conditions such as housing construction are severe.
Furthermore, the rotating buried hollow pipe pile in the buried state that has become unnecessary after the building or the like has been removed can be easily removed by turning the screw in the opposite direction to make the ground clear.

Furthermore, since the screw blades are intermittently wound spirally at appropriate intervals in the longitudinal direction of the outer peripheral surface of the hollow tube, the screw blades can be easily attached to the hollow tube, Screw blades are appropriately selected, and
It is possible to arbitrarily change the spacing of the screw blades and the number of the screw blades, and a rotary buried hollow pipe pile having the required strength corresponding to the purpose of use can be easily obtained,
Not only buildings such as houses, but also protective fences, guardrails,
It can be used in a wide range of fields as pillars or foundation piles for structures such as street lights or various guide boards.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a rotating embedded hollow pipe pile.

FIG. 2 is a schematic front view showing an example of an embedded state of a rotary embedded hollow pipe pile.

FIG. 3 is a front view showing a modification of the rotary buried hollow pipe pile.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal hollow tube 2 Blade 3 Starting end of blade 2 4 End of blade 2 5 Gap between starting end 3 and terminal end 4 of blade 2 6 Mounting hole 7 Base portion 8 Reinforcement 9 Concrete

Claims (3)

[Claims] 1. A plurality of screw blades projecting spirally in the width direction on the outer peripheral surface of a metal hollow tube having a closed end, intermittently at appropriate intervals in the length direction. A rotating embedded hollow pipe pile, wherein a starting end and an end of the screw blade are overlapped and wound with a gap above and below. 2. The hollow buried hollow pipe pile according to claim 1, wherein a mounting hole is formed near an upper end of the hollow pipe. 3. A plurality of screw blades projecting spirally in the width direction on the outer peripheral surface of a metal hollow tube having a closed end, intermittently at appropriate intervals in the length direction. In addition, during the rotary burying, the rotary buried hollow pipe pile formed by overlapping and winding the start end and the end of the screw blade with a gap above and below with a gap is screwed and buried. Construction method of hollow pipe pile.