JP2024024395A - Pull-out resistance pile of simple structure - Google Patents

Abstract

To provide a pull-out resistance pile of a simple structure in which an anchor is struck and inserted without requiring secondary man-powered work in a plow sole layer that is compressed and increases its density and a cultivated land with small stones, ensuring that a resistor is expanded and completed in the underground.SOLUTION: Two anchor side plates (21) having substantially triangular shapes are arranged in an arrowhead shape (3) at a tip (11) of a support rod (1) so as to face each other, bottom parts of the side plates (21) are bent in a direction opposite to the support rod and a rear end (22) is formed, at a support rod side (inside) angle in the vicinity in a tip direction from a bent part (23), a ground direction surface angle (α) of the support rod (1) and a resistance plate (4) is arranged so as to form an obtuse angle, the resistance plate (4) is arranged substantially vertically parallel to the bent part (23), a hole (24) is provided in the two side plates (21), and an angle maintenance member (5) having a resistance part using the hole is provided.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pull-out resistant pile for preventing wind damage of simple structures such as greenhouses.

In greenhouse cultivation, a very hard soil layer (cultivation layer B) is formed at the bottom of the cultivation layer (A) due to years of cultivation using tillers such as plows. In cultivated land with such a plow bed layer (B) or cultivated land with soil mixed with pebbles, it is difficult to insert ordinary disc piles, so a coiled round reinforcing bar with a sharply cut tip is used to provide resistance. Fewer twisted piles are used. However, since this twisted pile requires a great deal of manual effort, there has been a need for a pull-out resistant pile that is inexpensive and can be inserted easily.

As resistance piles to replace torsion-shaped piles, several pull-out resistance piles by impact insertion have been devised. For example, a pull-out resistance pile in which an expanding anchor (resistance element) is rotatably attached near the tip of a support rod (Patent Document 1), a ring part provided near the tip of the support rod and an anchor body (resistance element) orthogonally attached Disclosed are a pull-out resistance pile (Patent Document 2) that is rotated by the user, and a disc-shaped anchor without a support rod that is buried using a special hammer and impact tool (Patent Document 3).

However, in the pull-out resistance pile shown in Patent Document 1, the anchor (resistance element) is rotated after impact to expand at right angles to the support rod, but in order to do this, a shaft fitting (support shaft) is used to hold the anchor. It is necessary to connect to the support rod and slide the support rod using a special extraction jig, resulting in a complicated structure, troublesome manufacturing, and high cost.

In addition, in the pull-out resistance pile shown in Patent Document 2, when the prop rod is pulled out of the soil after impact, the resistance part that expands is configured with a ring part on the prop rod using a connecting column (prop shaft). Similar to the pull-out resistance pile of Document 1, the structure is complicated, the manufacturing process is many, and the cost is high.

Furthermore, the pull-out resistance pile (underground anchor) shown in Patent Document 3 is a disc-shaped anchor that does not have a prop rod, a wire is attached to it, and it is inserted into the ground using a special impact applying tool or slide hammer. It is. This disc-shaped anchor has a simple shape and is inexpensive, but in order to obtain sufficient wire tension, it is necessary to drive the disc-shaped anchor into the ground at an appropriate direction and angle. It is necessary to pull it out, and the impact applying tool and slide hammer are also operated underground, so there is uncertainty, the structure is complex, and the cost is high.

Japanese Patent Application Publication No. 2003-306935 Japanese Patent Application Publication No. 09-13371 JP2016-98530A

In view of the above-mentioned problems, the present invention meets the buyer's viewpoint as it can be easily inserted using a general-purpose piling tool or hammer, has a simple structure, is strong, has high pull-out strength, is inexpensive, and has excellent workability. The object of the present invention is to provide a pull-out resistant pile that can be completed only by impact insertion.

The pull-out resistance pile of the present invention does not use the rotation function of the resistor like the pull-out resistance piles of Patent Document 1 and Patent Document 2, but fixes the support rod (1) and the anchor (2) at their tips, and Pulling out using the fact that the anchor (2) is elastically deformed by the repulsive force (D) (see Figure 3) received from the soil when it is inserted into the soil (mainly in the plow layer) and when it is pulled out after insertion. The anchor (2) is a resistance pile, and the anchor (2) has two substantially triangular side plates (21) arranged facing each other in an arrowhead shape, with the bottom part of the side plate (21) facing the support rod (1) side. is bent in the opposite direction (outside) to form a rear end part (22), and near the tip of the two bent parts (23) of the side plate (21) in the direction (inside) of the support rod (1), The resistance plate (24) is arranged parallel to and substantially perpendicular to the bent portion (23) so that the angle (α) formed between the plane axis of the resistance plate and the axis of the prop rod in the striking direction is an obtuse angle.

Further, in the pull-out resistance pile of the present invention, a hole (24) is provided in the side plate (21), and the expansion of the side plate (21) is maintained at a constant angle using the hole (24). An angle maintaining member (5) is provided at both ends of the angle maintaining member (5) with a resistance member such as a nut having a diameter larger than the diameter of the hole (24).

The pull-out resistant pile of the present invention is a pull-out resistant pile that uses elastic deformation of the anchor material, which fixes the support rod and the anchor and can be easily inserted using a general-purpose pile driver or hammer. The effects and features will be explained below using the state diagram and the like.

As shown in FIG. 2, the head of the pull-out resistance pile of the present invention has a shape similar to that of a general impact pile, and is provided with a plastic house connection fitting (I). When the head of the pile is hit vertically with a general-purpose pile driver or hammer and the pile is inserted from the ground surface (G) into the soil layer (A), the arrowhead-shaped side plate (21) Although the soil layer (A) receives a repulsive force from the soil layer (A) inward (toward the shaft side), the force is not strong enough to deform the side plate, and the side plate (22) maintains its shape and moves toward the plow layer (B) below. It will be inserted into.

In the tiller layer (B) during impact insertion, as shown in Fig. 3, the arrowhead-shaped side plate (21) at the tip receives a strong repulsive force (D) from the surrounding hard stratum tiller layer (B). It bends inward (elastically deforms) upon receiving the support, so it becomes sharper and easier to insert, and the edge of the resistance plate (4) located near the support rod (1) contacts the support shaft (1). , Furthermore, since the angle (α) formed between the plane axis of the resistance plate (4) and the axis of the prop rod in the striking side direction is an obtuse angle, the outer periphery of the prop rod is connected to the resistance plate according to the elastic deformation of the side plate (21). (4) gradually moves upward, and the rear end portion (22) expands outward and downward.

After inserting it into the plow layer (B), connect the wire (pipe, etc.) of the plastic house fixing device to the connection fitting (I) and apply tension to the pile, as shown in Figure 4, the rear end (22 ), the resistance plate (4) and the side plate (21) receive a repulsive force (H) that resists the tensile tension (F) from the upper plowing layer (B), and the rear end part (22) and the side plate (21) The side plates (21) expand outward. Here, even if an excessive tensile tension (F) is applied due to a gust of wind, etc., the angle maintaining member (5) is fixed at a constant width through the hole (24) of the side plate (21), and the width is smaller than the diameter of the hole (24). Since retaining members such as large nuts are provided at both ends of the angle maintaining member (5), the side plate (21) does not bend downward and the expansion of the side plate (21) is maintained at a constant angle.

A perspective view showing the names of each part of the present invention Diagram of the state of resistance piles in the soil layer during impact insertion Diagram of the state of resistance piles in the plow layer during impact insertion State diagram of resistance pile in plow layer during tension Installation diagram of side plate angle maintenance member

An example of an embodiment of the pull-out resistance pile of the present invention will be described below.
The pull-out resistance pile of the present invention is composed of a support rod (1) and an arrowhead-shaped anchor (2) formed at the tip thereof, and the support rod (1) is made of round steel with a diameter of 13 mm and a length of about 700 mm. The anchor (2) consists of two side plates (21) made by laser cutting a 1.2 mm thick steel plate into a substantially triangular shape with a base of 60 mm and a height of 115 mm. 21) are arranged facing each other in an arrowhead shape so that their apexes match, and are fixed by welding. This ensures the strength of the anchor (2) to withstand the repulsive force received from the surrounding soil during impact insertion and facilitates penetration into the ground.

Next, the bottom parts of the two side plates (21) are bent at a width of 60 mm and an angle of 20 mm toward the side opposite to the support rod (outside) to form the rear end part (22), which will be used when pulling the pile out of the ground. In addition, a substantially rectangular steel resistance plate with a thickness of 1.2 mm, a length of 10 mm, and a width of 20 mm is installed on the support rod side (inside) near the bent portion of the rear end (22). By arranging and welding the width part of (4) so that the angle formed by the plane axis of the resistance plate and the axis of the prop rod in the direction of impact is an obtuse angle (α), the pile can be fixed in a hard stratum (plow layer). When it receives a strong repulsive force from This promotes elastic deformation (inward). For this reason, the arrowhead shape of the tip becomes sharper and the rear end (22) spreads outward (expands), which further increases the resistance area of the rear end (22) and increases the repulsive force.

In addition, a hole (24) of approximately 5.5 mm is provided in the two side plates (21) just below the center of the resistor (4), and a semicircle along the outer periphery of the support rod (1) is formed between the holes (24). By passing an expansion angle maintaining member (5) such as an arc-shaped member or a wire and fixing it with a nut larger than the diameter of the hole (24), a force that exceeds the expansion resistance force applied to both side plates (21) can be prevented. Even if the expansion angle maintaining member (5) acts, damage to the side plate (21) can be prevented up to the maximum tensile force of the expansion angle maintaining member (5).

In the above embodiment, a steel plate is used as the material and fixed by welding, but an elastically deformable material such as carbon may also be used, and it is not necessary to use the same material, and the fixing method can also be bolts or Other fixing means with low insertion resistance other than nuts may also be used. Further, the support rod may have a shape other than a round rod, such as a square rod, and may have a general length.

The present invention is the easiest method for inserting piles in hard compacted, high-density plow layer (B) or soil mixed with pebbles, and without requiring secondary human power. Therefore, it is a pile that expands further even when subjected to tensile force (F) such as gusts of wind, and since it maintains its angle, it has high resistance to all types of soil and can be pulled out with versatility. It is a resistance pile.

1 Strut rod 11 Strut tip 2 Anchor 21 Side plate 22 Rear end 23 Bent part 24 Hole 3 Arrowhead shaped part 4 Resistance plate 5 Angle maintenance member A Soil layer B Plow layer C Subsoil layer D From the soil at the time of insertion Repulsion force received E Impact force F Tensile tension G Ground surface H Repulsion force I received from the soil when pulling out Joint metal fittings

Claims (2)

An arrowhead-shaped anchor (2) is fixedly attached to the tip of a support rod (1), and is a pull-out resistance pile that utilizes elastic deformation of the anchor material,
The anchor (2) has two substantially triangular side plates (21) arranged facing each other so as to form an arrowhead shape, and the bottom part of the side plate (21) is placed in the opposite direction (outside) from the support rod (1) side. While bending it to form a rear end portion (22),
A resistance plate (4) is placed near the tip of the two bent portions (23) of the side plate (21) in the direction (inside) of the support rod (1), so that the resistance plate (4) is connected between the plane axis of the resistance plate and the impact side axis of the support rod. A pull-out resistance pile characterized in that it is arranged parallel to and substantially perpendicular to the bent portion (23) so that the angle (α) formed is an obtuse angle. A hole (24) is provided in the side plate (21), and the angle maintaining member (5) is inserted through the angle maintaining member (5) that maintains the expansion of the side plate (21) at a constant angle using the hole (24). 2. The pull-out resistance pile according to claim 1, further comprising a resistance member such as a nut having a diameter larger than the diameter of the hole (24) at both ends of the hole (24).

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