JP3135921U - Anchor pile for horizontal strength - Google Patents

Abstract

An object of the present invention is to provide an anchor pile for horizontal strength, which is excellent in pull-out strength and horizontal force and can be driven easily with a small earth auger.
An anchor pile including a shaft portion detachably attached to a portable small earth auger and a rotary blade provided spirally at a tip portion of the shaft portion is formed. A horizontal load-bearing collar 20 that slides along the shaft 1 is provided separately from the shaft 1. The horizontal load-bearing collar 20 includes a slide cylinder part 21, an embedded fixing part 22, and an introduction part 23. A horizontal load bearing collar 20 slidably mounted on the shaft portion 1 of the upper part of the rotary blade 2 embedded in the ground is provided so as to fix the anchor pile to the ground surface.
[Selection] Figure 1

Description

  The present invention relates to an anchor pile for horizontal strength, which is easy to drive in and has excellent pull-out force and horizontal strength, and is suitable for fixing a unit house, for example.

  The present applicant has previously proposed a unit house anchor pile and an anchor pile described in Patent Document 1. This anchor pile has a shaft part that can be attached to and detached from a portable small earth auger, and a rotary blade that spirals around the tip of the shaft part, and can be embedded and removed by rotating the small earth auger. It has a strong fixing force even without installing a cloth foundation, etc., can shorten the construction time of the unit house, and can be easily removed after use and made reusable. .

  However, the anchor pile of Patent Document 1 is provided with a rotating blade spirally from the vicinity of the tip portion of the shaft portion, and thus has excellent pull-out strength, but has left a problem in horizontal force. Therefore, in the anchor pile for unit houses of patent document 1, driving force was formed in a body different from this anchor pile, and horizontal force was secured by using this driving pile and anchor pile together.

  On the other hand, a steel pipe pile is proposed in Patent Document 2 as a pile excellent in horizontal force and supporting force. According to this steel pipe pile, by connecting a plurality of steel pipe cylindrical members having a large diameter on the upper side and a small diameter on the lower side in a coaxial manner, a wedge effect similar to that of a tapered pile is achieved in the ground. It can be demonstrated and has a greater support than straight piles.

Patent Document 3 describes a screwed steel pipe pile and its construction method. This screw-type steel pipe pile has a lower steel pipe provided with a wing at the tip of the pile and an upper steel pipe having a diameter larger than that of the lower steel pipe and joined to the upper end of the lower steel pipe. It is formed below the outer diameter. Such a screwed steel pipe pile is intended to increase the horizontal force.
Utility Model Registration No. 3133482 Japanese Patent Laid-Open No. 11-181759 JP 2000-73365 A

  However, in the steel pipe pile described in Patent Document 2 and the screw-in type steel pipe pile described in Patent Document 3, it is necessary to use a large crane or a large auger machine when driving these piles. Driving with a free small earth auger is impossible.

  In addition, since each pile is driven by integrating the upper part formed with a large diameter and the lower part formed with a small diameter, the energy required for driving must be enormous. In addition, once driven in, it takes a great deal of energy to pull out these piles.

  Therefore, the present invention has been devised to solve the above-mentioned problems. In an anchor pile that can be driven and pulled out with a small earth auger, it has excellent pull-out strength and horizontal force and is easy to drive. The purpose is to provide anchor piles for strength.

  The first means of the present invention comprises a shaft portion 1 detachably attached to a portable small earth auger P, and a rotary blade 2 provided in a spiral shape around the tip portion of the shaft portion 1. In an anchor pile 10 provided so as to be freely embedded and extracted by rotating the earth auger P, the anchor pile slides along the shaft 1 and anchors the horizontal load-bearing collar 20 that is driven into the ground surface after the rotary blade 2 is embedded. It was provided separately from the pile 10 and provided to fix the anchor pile 10 by driving a horizontal load-bearing collar 20 slidably mounted on the shaft 1 at the top of the rotary blade 2 embedded in the ground into the ground surface. is there.

  The rotary blade 2 of the second means is a rotary blade 2 made of a spiral steel strip and provided so as to form a concave curve that increases the drawing strength on the drawing surface of the rotary blade 2 in the drawing direction. The rotary blade 2 includes a small-diameter introduction blade 2A provided in the vicinity of the tip portion of the shaft portion 1, a pulling-resistant blade 2B having a blade having a diameter larger than the introduction blade 2A, and an uppermost portion of the rotary blade 2. It is composed of a return blade 2C which is positioned and has a blade having a diameter smaller than that of the drawing strength blade 2B.

  The horizontal load-bearing collar 20 of the third means is the same as the diameter of the slide tube portion 21 through which the shaft portion 1 penetrates and the pull-out load-proof blade 2B of the rotary blade 2 provided around the slide tube portion 21 or the pull-out load strength. The embedded fixing portion 22 extends wider than the diameter of the blade 2B, and the introduction portion 23 is formed so as to be narrowed from the embedded fixing portion 22 toward the slide cylinder portion 21 below.

  In the horizontal load-bearing collar 20 of the fourth means, the outer shape of the embedded fixing portion 22 has a substantially cylindrical shape, and the outer shape of the introduction portion 23 has a substantially conical shape.

  In the horizontal load-bearing collar 20 of the fifth means, the embedded fixing portion 22 has a plate shape, and the introduction portion 23 includes a plurality of introduction pieces 23A provided on the lower surface of the embedded fixing portion 22. A means for solving the problem is to be fixed substantially radially around 21.

  According to claim 1 of the present invention, the anchor pile provided so as to be embedded and extracted by the rotation operation of the small earth auger P can be reinforced by the horizontal load-bearing collar 20. Therefore, any pile that can be buried with the small earth auger P can strengthen the horizontal force.

  According to the rotary blade 2 described in claim 2, the pulling strength and the horizontal force are excellent. In addition, the anchor pile 10 after use can be easily extracted by the small earth auger P.

  Since the horizontal load-bearing collar 20 in claims 3 to 5 is composed of the slide cylinder portion 21, the embedded fixing portion 22, and the introducing portion 23, the horizontal load-bearing collar 20 can be easily driven. Therefore, an anchor pile that can be driven easily can be provided.

  In the horizontal load-bearing collar 20 according to claim 4, the embedded fixing portion 22 having a substantially cylindrical shape and the introducing portion 23 having a substantially conical shape are driven into the ground surface above the already embedded rotary blade 2. Thus, the ground surface softened by the embedding operation of the rotary blade 2 is firmly solidified.

  Further, according to the horizontal load-bearing collar 20 according to claim 5, the plurality of introduction pieces 23 </ b> A fixed substantially radially around the slide cylinder portion 21 bite into the ground under the embedded fixing portion 22. It has the effect of solidifying the ground surface.

  As described above, according to the present invention, in the anchor pile that can be driven and pulled out with a small earth auger, the pulling strength and the horizontal force are excellent, and further, there are various beneficial effects such as easy driving operation. is there.

  The best mode of the present invention is an anchor pile comprising a shaft portion 1 detachably attached to a portable small earth auger P, and a rotary blade 2 provided in a spiral shape around the tip portion of the shaft portion 1. Form. The rotary blade 2 is formed of a spiral steel strip and is provided on the drawing surface in the drawing direction of the rotary blade 2 so as to form a concave curve that increases the drawing strength. The rotary blade 2 is positioned at the uppermost portion of the rotary blade 2, the introduction blade 2 </ b> A having a small diameter provided in the vicinity of the tip portion of the shaft portion 1, the pulling strength blade 2 </ b> B having a larger diameter than the introduction blade 2 </ b> A It is comprised with the return blade 2C which has a blade | edge with a diameter smaller than the drawing pulling strength blade 2B. On the other hand, a horizontal load-bearing collar 20 that slides along the shaft 1 is provided separately from the shaft 1. The horizontal load-bearing collar 20 includes a slide tube portion 21 through which the shaft portion 1 passes, an embedded fixing portion 22 provided around the slide tube portion 21 and projecting wider than the maximum diameter of the rotary blade 2, It consists of the introducing | transducing part 23 which narrowed toward the axial part 1 of the downward direction from the embedment fixing part 22. The initial purpose is achieved by providing a horizontal load bearing collar 20 mounted on the shaft portion 1 of the upper part of the rotary blade 2 embedded in the ground so as to fix the anchor pile to the ground surface. .

  The basic configuration of the present invention includes an anchor pile 10 that is detachable from a small earth auger P, and a horizontal load-bearing collar 20 that is provided separately from the anchor pile 10 (see FIG. 1).

  An earth auger (commonly known as an anchor drill) is a construction machine that uses a motor or the like to rotate a screw or the like and screw it into the ground to dig a hole. These earth augers range from large ones that are lifted by a crane to small portable ones that are carried and used by workers. The power can be engine, electric motor, hydraulic, manual, but the small earth auger P used in the present invention is a portable small earth auger P in which an electric motor or the like is used. It is used as a driving machine and a drawing machine (see FIG. 3). The power of the small earth auger P can be arbitrarily changed. The small earth auger P in the illustrated example includes a square pipe-shaped adapter P1 for connecting a screw or the like (see FIG. 2), and a connecting bolt P2 is passed through the base end of the screw or the like inserted into the adapter P1. Let them connect.

  The shaft portion 1 of the present invention is provided with a solid steel material, and the tip portion 3 of the shaft portion 1 is formed in a sharp shape. It is also possible to reduce the weight by using a steel pipe material for the shaft portion 1. Further, the shaft portion 1 can be made of other metal materials such as stainless steel or reinforced plastic. The diameter of the shaft portion 1 is determined by the specifications of the small earth auger P. For example, according to the small earth auger P using an electric motor, the shaft portion 1 having a diameter of 22 mm and a length of 900 mm can be operated.

  Furthermore, a sharp steel tip 3 may be provided separately at the tip of the shaft 1. With such a steel tip 3, the embedding strength and durability of the shaft 1 can be increased.

  On the other hand, a connecting portion 4 connected to the small earth auger P is provided at the base end portion of the shaft portion 1 (see FIGS. 1 and 2). In the embodiment, a connecting portion 4 having a horizontal hole through which the connecting bolt P2 passes is provided in accordance with the adapter P1 of the small earth auger P to be used. The base end portion is provided with a male threaded portion 1A (see FIG. 1). In the illustrated example, the shaft portion 1 is connected to a connecting arm portion Q1 provided in the unit house Q and is screwed with a fixing nut 6 (see FIG. 4).

  The rotary blade 2 can form the tough and durable rotary blade 2 by using a spiral steel strip. And it is provided on the drawing surface 2D in the drawing direction of the rotary blade 2 so as to form a concave curve that increases the drawing strength (see FIG. 1). This curve is formed, for example, by forcibly bending the rotary blade 2 when the spiral plate-like rotary blade 2 is welded to the shaft portion 1. Also, the material of the rotary blade 2 can be other metal materials such as stainless steel, reinforced plastic, etc., as with the shaft portion 1.

  Furthermore, the rotary blade 2 is provided with three types of blades for different applications (see FIG. 1). The introduction blade 2 </ b> A is provided around the shaft portion 1 from the vicinity of the tip portion of the shaft portion 1, and facilitates the screwing operation of the anchor pile 10. On the other hand, the pulling strength blade 2B increases the pulling strength of the shaft portion 1, and extends from the introduction blade 2A and has a blade having a diameter larger than that of the introduction blade 2A. Furthermore, the return blade 2C is a blade positioned at the uppermost part of the rotary blade 2, and serves as a guide when the anchor pile 10 is pulled out, facilitating the pulling operation. The return blade 2C is formed with a blade having a smaller diameter than the drawing strength blade 2B.

  The horizontal load-bearing collar 20 is slid along the shaft 1 and driven into the ground surface after the rotary blade 2 is embedded, and is provided separately from the shaft 1. The horizontal load-bearing collar 20 includes a slide cylinder portion 21, an embedded fixing portion 22, and an introduction portion 23 (see FIG. 1). The slide cylinder part 21 is a cylindrical member through which the shaft part 1 passes. The embedded fixing portion 22 is a member fixed to the periphery of the slide cylinder portion 21 and is formed so as to protrude the same as or wider than the diameter of the drawing strength blade 2 </ b> B of the rotary blade 2. Furthermore, the introduction part 23 is formed so as to squeeze from the embedded fixing part 22 toward the lower slide cylinder part 21. The shape of the horizontal load-bearing collar 20 made of these steels can be arbitrarily changed.

  The horizontal strength collar 20 shown in FIG. 1 or 4 is a horizontal strength collar 20 in which the outer shape of the embedded fixing portion 22 has a substantially cylindrical shape and the outer shape of the introduction portion 23 has a substantially conical shape. In the illustrated example, the interior of the embedded fixing portion 22 and the introduction portion 23 are provided in a hollow shape, but may be formed in a solid shape. Further, the substantially cylindrical embedded fixing portion 22 and the substantially conical introduction portion 23 can be changed to a prismatic shape, a pyramid shape, or the like.

  On the other hand, in the horizontal load-bearing collar 20 shown in FIGS. 5 to 7, the embedded fixing portion 22 has a plate shape. The introduction portion 23 is composed of a plurality of introduction pieces 23A provided on the lower surface of the embedded fixing portion 22, and each introduction piece 23A is fixed substantially radially around the slide cylinder portion 21. Yes (see FIG. 6). The illustrated introduction piece 23A is formed of a substantially trapezoidal plate (see FIG. 5). The shape of the introduction piece 23A can be arbitrarily changed.

  Next, a method for driving the anchor pile 10 of the present invention will be described. First, the anchor pile 10 is buried deeply in the ground with a small earth auger P at a predetermined position (see FIG. 3). Next, the horizontal strength collar 20 is slid onto the shaft 1 and the horizontal strength collar 20 is driven into the ground surface with a hammer or the like. Since the ground surface into which the horizontal load-bearing collar 20 is driven is already softened by the rotary blade 2, it can be driven easily by human power. And the horizontal force of the anchor pile 10 is ensured by hardening the ground surface with this horizontal strength collar 20. In the example of illustration, although the example connected with the unit house Q is shown, the use of this invention anchor pile is not limited to the example of illustration.

  In addition, each structure of the example of illustration in this invention is only one Example of this invention, and within the range which does not deviate from the summary of this invention, design changes, such as a shape and a dimension, a change of material, and a change of form, etc. It can be freely changed within the known technical scope.

It is a front view which shows one Example of this invention anchor pile. It is a front view which shows one Example of the small earth auger used by this invention. It is a front view which shows the operation state of this invention anchor pile. It is a front view which shows one usage example of this invention anchor pile. It is a front view which shows the other Example of the horizontal strength collar of this invention. It is a bottom view of the horizontal proof stress collar shown in FIG. It is a front view which shows the other usage example of this invention anchor pile.

Explanation of symbols

P Small earth auger P1 Adapter P2 Connection bolt Q Unit house Q1 Connection arm 1 Shaft 1A Male thread 2 Rotary blade 2A Introducing blade 2B Extraction strength blade 2C Return blade 2D Extraction surface 3 Tip 4 Connection 5 Washer 6 Fixing nut 10 Anchor pile 20 Horizontal load-bearing collar 21 Slide cylinder part 22 Buried fixing part 23 Introduction part 23A Introduction piece

Claims (5)

  Equipped with a shaft that can be attached to and detached from a portable small earth auger, and a rotary blade spirally provided around the tip of the shaft, and can be embedded and removed by rotating the small earth auger. In the anchor pile, a horizontal load-bearing collar that slides along the shaft and is driven into the ground surface after the rotary blade is embedded is provided separately from the anchor pile, and the upper part of the rotary blade embedded in the ground A horizontal load-bearing anchor pile characterized in that a horizontal load-bearing collar that is slid on the shaft is driven into the ground surface to fix the anchor pile.   The rotary blade is a rotary blade that is formed of a spiral steel strip and is provided so as to form a concave curve that increases the drawing strength on the drawing surface in the drawing direction of the rotary blade. A small-diameter introduction blade provided near the tip of the part, a drawing-resistant blade having a larger diameter than the introduction blade, and a return blade located at the top of the rotary blade and having a smaller-diameter blade than the drawing-proof blade The horizontal load-bearing anchor pile of Claim 1 comprised by these.   The horizontal load-bearing collar is embedded in a slide tube portion through which the shaft portion penetrates, and is provided around the slide tube portion and has the same diameter as the pull-out load-proof blade of the rotary blade or wider than the diameter of the pull-out load-proof blade. The horizontal load-bearing anchor pile according to claim 1 or 2, comprising a fixing portion and an introduction portion formed so as to be narrowed from the embedded fixing portion toward a slide cylinder portion below.   4. The horizontal load-bearing anchor pile according to claim 1, wherein in the horizontal load-bearing collar, an outer shape of the embedded fixing portion has a substantially cylindrical shape, and an outer shape of the introduction portion has a substantially conical shape. In the horizontal load bearing collar, the embedded fixing portion has a plate shape, and the introduction portion has a plurality of introduction pieces provided on the lower surface of the embedded fixing portion fixed substantially radially around the slide cylinder portion. The horizontal load-bearing anchor pile according to any one of claims 1 to 3.

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