JPH11140871A - Screwed-in type steel pipe pile with wing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure of a steel-made board constituting a wing and also make easy the production by mounting the steel-made board composed of a polygonal steel board divided into several pieces to a tip of a steel pipe in an inclined manner. SOLUTION: At a tip of a steel pipe 2, a mounting part cut spirally 3 is provided. The height of a stepped part forming the part 3 differs corresponding to the condition of soil, into which a steel pipe pile 1 is buried, and the outer diameter of the steel pipe 2. Steel made plates 10a, 10b constituting wings mounted on a tip of the steel pipe 2 are formed into a plane shape by dividing a rectangular steel plate into two from the center. The thus-formed steel pipe pile 1 is for example connected to an auger and rotated, then screwed into the ground through the screw function of the wings 10a, 10b and buried therein. In inserting the pile 1, the excavation rotation side surface of soil is formed by an angular parts (maximum angular parts) of the wings 10a, 10b, and accordingly the rear side surface of tip angle part has a tendency to be apart from the wall surface of soil excavated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screwed steel pipe pile with wings, and more particularly, to a steel pipe pile formed by inclining a polygonal or arbitrary-shaped steel plate at the tip of a steel pipe, The present invention relates to a winged screw-in type steel pipe pile which is buried in the ground without any soil removal by applying a rotating force to the steel pipe pile.

[0002]

2. Description of the Related Art A method of embedding a steel pipe pile underground by the action of a screw by applying a rotating force to a steel pipe pile having a wing plate attached to an outer peripheral surface or a tip portion of a steel pipe by a machine installed on the ground. Many proposals have been made in the past, some of which have been targeted for small diameter piles, but have been put to practical use. Here, three inventions considered to be related to the present invention are described.
This will be described below.

In the method of burying a steel pipe pile described in Japanese Patent Publication No. 2-62848, a bottom plate is fixed to a lower end of a steel pipe pile body, a drilling blade is provided on the bottom plate, and an outer periphery of a lower end portion of the pile body is provided. The steel pipe pile, which has a large wing width screwing wing having an outer diameter almost twice as large as the outer diameter of the pile body on the surface, is screwed into the soft ground, and the ground is rotated while being screwed into the soft ground. While excavating and softening the soil at the tip of the pile body with the drilling blade at the lower end, making the spiral wings bite into the undigged earth and sand on the side of the pile, and rotating and propeling the pile as a reaction force against the soil's strength. In addition, excavated and softened earth and sand is extruded to the side of the pile and compressed, and the pile is screwed into the ground without discharging the soil (prior art 1).

A steel pipe pile described in Japanese Patent Application Laid-Open No. 7-292666 has a pair of spiral wings, each of which has a length of half a roll and an outer diameter of about 1.5 to 3 times the pile body. A plurality of steel pipe piles are fixed discontinuously relative to each other at the same height position on the outer peripheral surface of the lower end portion of the steel pipe pile with the same helical direction (prior art 2).

[0005] Further, a rotary press-fit steel pipe pile described in Japanese Patent Application Laid-Open No. 61-98818 has a structure in which a steel cylinder is provided at a lower portion thereof.
Providing a blade having a pushing inclined front surface extending in the vertical direction, and fixing an inclined blade that rises obliquely backward from the lower end of the inclined surface toward the rear of the cylindrical body to form an annular drill head, The lower end of the steel pipe pile is attached to the upper end of the drill head (prior art 3). The spiral wings or inclined blades shown in these prior arts 1 to 3 function not only as screws during construction but also as supports for obtaining a large ground reaction force.

[0006]

(1) Prior art 1 has the following problems in screwing work. When screwing a steel pipe pile into the ground containing large gravel or boulders, the spiral wing is almost one turn, so that the stone is clogged between the cutting start and end portions of the spiral wing, making it difficult to penetrate. Although there is a method of increasing the angle of the helix, the penetration resistance increases and a large construction machine is required, which is uneconomical. Further, in a place where the ground hardens rapidly, a single spiral wing type causes insufficient penetration force. Although there is a method in which the spiral blades are multi-staged, processing costs and material costs increase. Furthermore, since the lower end of the pile is covered with a bottom plate, when it hits a hard layer, it runs idle and becomes difficult to penetrate.

(2) The prior arts 1 and 2 have the following problems in structural mechanics. The steel pipe piles of the prior arts 1 and 2 receive a strong reaction force from the ground on the lower surface of the wing when the vertical force acts on the steel pipe pile due to the weight of the mounted structure or the seismic force after the construction is completed. As a result, a large bending moment is generated at the root of the blade, and transmitted to the steel pipe to generate a large bending stress. As described in the description of the prior art 2, the bending stress does not pose a serious problem in practical use if the outer diameter of the steel pipe is as small as 100 to 200 mm. However, a widely used steel pipe pile having an outer diameter of 500 to 600 mm poses a serious problem in design.

It is said that the outer diameter of the spiral blade is preferably about twice as large as the diameter of the steel pipe in terms of construction or supporting force, as shown in prior arts 1 and 2. Here, a pile with a steel pipe diameter of 200 mm and 6
Compare the 00mm pile. Now, assuming that the outer diameter of each spiral blade is 400 mm, 1200 mm, which is twice the diameter of the steel pipe,
The width {(wing outer diameter−steel pipe outer diameter) / 2} of the spiral blade is 100 mm and 300 mm, respectively. Assuming that the ground reaction force per unit area acting on the spiral blade is the same, the bending moment per unit circumference acting on the root of the spiral blade is proportional to the square of the width of the spiral blade. Then outer diameter 2
It is about 9 times larger than a 00 mm steel pipe. For this reason,
Spiral wings are required to be very thick.

On the other hand, a bending moment is transmitted from the spiral blade to the steel pipe near the root of the spiral blade, and a bending stress is generated. The magnitude of the bending moment transmitted to the steel pipe varies depending on the dimensions of the steel pipe, but is about 50 to 100% of the base. For example, in the case of a steel pipe with an outer diameter of 600 mm, 4
5 of the bending moment value of the spiral wing that requires a thickness of 0 mm or more
A bending moment of 100 to 100% acts on the steel pipe near the root. In the case of a steel pipe pile having an outer diameter of 600 mm, the thickness generally used is about 9 to 12 mm, and the bending stress of the steel pipe greatly exceeds the design allowable bending stress. According to the FEM analysis performed by the inventor, a light thickness of 20 mm is required in the vicinity of the blade mounting portion. It is uneconomical to make the pile length so thick.

(3) The prior arts 1 and 2 have the following problems in processing and mounting on a steel pipe. Prior art 1 and 2
Steel pipe piles are made by bending flat plates into spiral blades,
It is difficult to process into a uniform spiral, and as the thickness increases, the processing equipment increases. In addition, when spiral wings are welded to the side surface, a gap or the like is formed unless the accuracy is very high, which is troublesome.

(4) Prior art 3 has a serious problem that a large ground support force cannot be obtained because the steel cylindrical body does not have a lid at the tip. Further, since the width of the inclined blade is small and the structure slightly projects inside and outside the tip of the steel cylinder, the inclined blade cannot be expected as a support having a large ground support force. On the other hand, when the width of the inclined blade is increased to increase the ground support force, a large bending moment is generated at the base of the pile body due to the effect of the ground reaction force, which is transmitted to the steel pipe pile and generates a large bending stress. . Further, in the prior art 3, since a steel cylinder with an inclined blade is manufactured and then fixed to the tip of the steel pipe, an increase in cost is inevitable.

Furthermore, in the prior art 3, since the inclined blade is a so-called single-stage blade provided at only one position at the lower end of the steel pipe, the steel pipe pile is pushed downward during screwing of the steel pipe pile. Power is relatively weak.
For this reason, when the tip of a steel pipe pile reaches a hard stratum, it may idle.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to solve the following problems. (1) A large ground support force can be obtained by using the wing. (2) It is economical with less wing processing. (3) Easy mounting. (4) Excessive stress is not generated in the steel pipe pile due to the bending moment transmitted from the wing. (5) The steel pipe pile can be embedded into the strong ground by screwing.

[0014]

Means for Solving the Problems (1) A screwed steel pipe pile with wings according to the present invention is divided into a plurality of steel pipes having a helical notch at the tip and a polygonal steel plate having a larger outer diameter than the steel pipe. And a plurality of steel plates are attached to the tip of the steel pipe at an angle.

(2) Instead of the polygonal steel plate of the above (1), a steel plate having an arbitrary shape is divided into a plurality of pieces to form a flat steel plate. (3) The opening formed between the adjacent steel plate and the steel pipe of (1) or (2) was closed with a closing member.

(4) The vicinity of the tip end of the steel pipe to which the steel plate of (1), (2) or (3) is attached is determined based on the strength of the steel pipe or the reinforcing pipe having a thickness greater than the thickness of the steel pipe. It consisted of a large strength intensifier tube. (5) Immediately before or after the steel pipe pile driving of (1), (2), (3) or (4) above, the solidified material is injected into the ground from the tip of the steel pipe pile or its vicinity. Then, it was integrally formed with the steel pipe pile.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Embodiment 1] FIG. 1 is a perspective view of Embodiment 1 of a screwed steel pipe pile with wings according to the present invention, and FIG.
FIG. 2 is a perspective view of the main part. In the drawing, 1 is a screw-in steel pipe pile with wings (hereinafter simply referred to as a steel pipe pile), 2 is a steel pipe constituting the steel pipe pile 1, and 10 a and 10 b are steel plates constituting a wing attached to the tip of the steel pipe 2. It is.

At the tip of the steel pipe 2, as shown in FIG.
A spirally cutout mounting portion 3 is provided, and the height h of the step 3a forming the mounting portion 3 depends on the state of the ground in which the steel pipe pile 1 is embedded, the outer diameter of the steel pipe 2, and the like. Although different, generally h = 0.1 to 0.6D (D is the outer diameter of the steel pipe 2)
Desirably. When the step is less than 0.1D, the penetration amount per rotation of the steel pipe pile 1 decreases, and when it exceeds 0.6D, the penetration amount per rotation becomes too large. Since the torque required for the excavation is excessive and the depth of the ground excavated by the steel plates 10a and 10b is increased, the supporting force is slightly reduced.

The steel plates 10a and 10b constituting the blade attached to the tip of the steel pipe 2 are, for example, formed by dividing a square steel plate 10 as shown in FIG. It has a very simple structure. The combined size of the steel plates 10a and 10b differs depending on the condition of the ground in which the steel pipe pile 1 is embedded, the outer diameter of the steel pipe 2, and the like. It is desirably about 3.0 times. Here, the size of the steel plates 10a and 10b refers to the diagonal length L of the steel plate 10 shown in FIG. 3 in the case of the present embodiment.

The steel pipe pile 1 constructed as described above is connected to an auger 31 mounted on a base machine 30 as shown in FIG. 10, for example, and is rotated by the auger 31 so as to be screwed by the steel plates 10a and 10b. Screwed into the ground and buried. At this time, since the opening 11 formed by the discrepancy between the ends of the steel plates 10a and 10b is small, the earth and sand hardly enters the steel pipe 2.

In this embodiment, when the steel pipe pile 1 is penetrated, the side surface in the rotation direction of the excavation of the soil is formed by the corners (maximum portions) of the steel plates 10a and 10b. The side behind the tip corner tends to move away from the excavated ground wall. That is, the steel plates 10a, 10a
b has a flank behind the excavation. For this reason, the friction resistance at the time of penetration can be reduced as compared with the conventional steel pipe pile having the outer peripheral arc of the spiral wing in which the side surface at the back of the excavated portion constantly contacts the excavated ground wall surface.

FIG. 4 is a perspective view showing another example of this embodiment. In this example, the steel plates 10a and 10b of FIG.
At the tip of the steel pipe 2, triangular steel plates 10c and 10d obtained by cutting a square steel plate at diagonal lines and dividing it into two are attached. In addition, the opening 11 formed between the steel pipe 2 and the staggered portion at both ends of the steel plates 10 c and 10 d is closed by a closing plate 12. The operation of this example is almost the same as that of the example of FIG. 1, but the opening 11 formed between the staggered portion of the steel plates 10 c and 10 d and the steel pipe 2 is closed by the closing plate 12. In this case, intrusion of earth and sand into the steel pipe 2 can be reliably prevented. The closing plate 12 can be used in other examples and other embodiments.

FIG. 5 shows still another example of the present embodiment. In this example, the steel plates 10e and 10f are formed by dividing a hexagonal steel plate into two parts. For example, as shown in FIG. To
If the shape and arrangement are properly selected, the waste of the steel plate 10 can be reduced. The operation of this embodiment is almost the same as that of the embodiment of FIG. 1, but the penetration of the steel plates 10e and 10f becomes smoother by making them closer to a circle.

In the steel pipe pile 1 constructed as described above, since the steel plates 10a to 10f (hereinafter, referred to as steel plates 10a and 10b) protrude greatly from the outer peripheral surface of the steel pipe 2, the steel pipe pile 1 is screwed into the ground. The function of screwing the steel pipe pile 1 into the ground by the steel plates 10a and 10b penetrating into the ground below, and excavating the soil and sand below the steel pipe 2 at the staggered portion and extruding it around the steel pipe 2 and compressing it. It has both functions. Further, after the construction, when functioning as a pile for supporting a vertical load by an overlying building or the like, the steel plate 10
In a and 10b, the entire area of the bottom plate closing the lower end opening of the steel pipe pile 1 and the part protruding from the outer periphery of the steel pipe 2 function as a support, and a large ground support force can be obtained. it can.

As described above, the steel plates 10a and 10b have both functions of protruding into the outer periphery of the steel pipe 2 and cutting into the ground, and functioning as a bottom plate for closing the opening at the tip of the steel pipe. It is known that the ground bearing capacity of a steel pipe pile having a closed tip is proportional to the closed area. For example, if the size of the steel plates 10a and 10b is made approximately twice as large as the outer diameter of the steel pipe 2, the area of the steel plates 10a and 10b becomes about four times that of the case without the steel plates 2 and a very large ground support. Power is gained. Further, since the opening 11 formed by the discrepancy between the two ends of the steel plates 10a and 10b is closed by the closing plate 12, the infiltration of earth and sand into the steel pipe 2 can be prevented. Is extruded to the side of the steel pipe pile 1 and is compressed into high-density earth and sand, so that the ground support force due to the peripheral frictional force of the steel pipe pile 1 can be increased.

[Embodiment 2] By the way, the steel plates 10a,
In order to receive a large ground reaction force due to 10b, steel plates 10a and 10b require high rigidity. For example, when the outer diameter of the steel pipe 2 is 500 mm and the size of the steel plates 10a and 10b is about 1000 mm, a large bending moment is generated in the steel plates 10a and 10b due to the ground reaction force. It is required to use steel plates 10a and 10b of about 40 mm, and this bending moment is transmitted to the steel pipe 2 to generate a large bending stress. The magnitude of the bending moment depends on the outer diameter of the steel pipe 2 and the steel plates 10a and 10a.
Depending on the relationship with the size of b and the distribution of ground reaction force,
It is conceivable that a large imbalance occurs in the bending moment applied to the steel plates 10a and 10b inside and outside the steel pipe 2, and a large bending moment is transmitted to the steel pipe 2 as shown in FIG.

In the present embodiment, as shown in FIG.
Is affected by the bending moment of the steel pipe 2, the wall thickness t
Acceptable thicker wall thickness t ₂ of the steel than _1, or intensifier 5 consisting of greater strength of the steel than the intensity of the steel pipe 2 by welding to the steel pipe 2, the bending stress generated in the portion having the effect of bending moment It is designed to be within the stress. Incidentally, intensifier 5 may be constructed by bending a strength greater than the strength of the steel material of the steel product or steel pipe 2 thick thickness t ₂ than the thickness t ₁ of the steel pipe 2 into a cylindrical shape, or as described above A steel pipe having a large thickness or a large strength may be used.

The plate thickness and length of the reinforcing pipe 5 are determined by numerical analysis in consideration of an assumed ground reaction force. For example, the outer diameter of the steel pipe 2 is 500 mm, and the steel plate 10
When a and 10b are 1000 mm in size and a vertical load of 500 t is applied, a normal steel pipe has a thickness of 14 mm and a yield stress (2400 kgf / cm ² ) where only axial force is applied.
However, the thickness of about 20 mm is required to keep the stress of the portion where the axial force and the bending moment act within an allowable value, and it is uneconomical to mount the steel plates 10a and 10b as they are. I will. Therefore, if the thickening tube 5 or the reinforcing tube 5 having a large strength is used in a portion where the bending moment acts, it becomes economical without increasing the thickness of the entire length of the steel pipe 2 and can sufficiently cope with bending stress. Become. Further, since the reinforcing pipe 5 is formed by cutting and bending a steel plate or simply cutting a steel pipe, various sizes can be used according to the applied load.

[Embodiment 3] When the outer diameter of the steel pipe 2 increases, the outer diameter of the steel blade 10 also increases as described above, and accordingly, the thickness of the steel blade 10 also increases. As a result, for example, when the steel pipe pile 1 is screwed into the ground by the base machine 30 as shown in FIG. 10, a large resistance due to the ground is applied to the ends of the steel plates 10a and 10b on the rotation direction side, and the torque is weak. Sometimes it becomes impossible to rotate and cannot penetrate the ground.
For this reason, there arises a problem that the base machine 30 must be increased in size. In the present embodiment, in order to solve such a problem, the cut-in portions (ends on the rotation direction side) of the steel plates 10a and 10b are cut at an acute angle to provide an inclined surface,
As a result, the resistance of the ground applied to the end portion is reduced, the penetration into the ground is facilitated, and the torque is reduced. Note that, instead of the inclined surface, a digging blade for assisting digging may be attached to the bite portion of the steel plates 10a and 10b.

[Embodiment 4] In this embodiment, when the steel pipe pile 1 is screwed and embedded in the ground, the steel plates 10a, 10b are prevented from being deformed at the ends thereof.
A reinforcing member is attached to the biting portion b.

[Embodiment 5] FIG. 9 is an explanatory diagram of this embodiment. In the present embodiment, when the steel pipe pile 1 is driven into the ground, the solidified material injection pipe 13 is inserted into the steel pipe pile 1 immediately before or after the driving, and the tip portion of the steel pipe pile 2 or the steel plate 10 is set.
a, a solidifying material 14 such as cement milk, cement mortar, or liquid resin is injected into the ground from below the steel pipe 2 (or the reinforcing steel pipe 5) and around the steel plates 10a and 10b. It is integrated with the steel pipe pile 1. Thereby, when the steel pipe pile 1 is buried, the steel plates 10a, 1
The ground disturbed by Ob is strengthened, and a large supporting force can be obtained.

EXAMPLE Next, an example of a construction test in which the steel pipe pile 1 according to the second embodiment shown in FIG.
An embodiment of the present invention will be described. Steel pipe 2 constituting steel pipe pile 1
Is a length L: 30 m, an outer diameter D: 500 mm, and a wall thickness t ₁ : 1.
4 mm, the material is 40 kg steel, and the intensifier tube 5
The length H is 250 mm, the wall thickness t _{2 is} 20 mm, and the material is 50 kg steel. Further, the size of the steel plates 10a and 10b was 1000 mm and the thickness was 40 mm. The height of the step h was 0.125D (62.5 mm).

In the construction, the rotational force of the steel pipe pile 1 is shown in FIG.
The signal was transmitted to the pile head by the auger 31 mounted on the base machine 30 shown in FIG. The ground at the test site is landfill soil up to the surface or 5m, soft cohesive soil with N value of about 2 from 5m to 27m,
At a depth of 27 m or less, a strong fine sand layer having an N value of 40 or more was formed. As a result of this construction test, the steel pipe pile 1 was able to be buried to a predetermined depth smoothly in a short time. After the embedding work, the steel pipe pile 1 is pulled out from the ground by rotating in the reverse direction to remove the steel wing 10.
When a and 10b were investigated, there was no clogged boulder.

As described above, when the screwed steel pipe pile with wings according to the present invention is embedded by screwing by applying a rotational force to the steel pipe pile 1, the steel plates 10 a and 10 b outside the outer peripheral surface of the steel pipe 2 are laid out. The portion has a function of propelling the steel pipe pile 1 downward by a reaction force from the surrounding ground similarly to the action of the screw. Since the bending moment transmitted from the steel plates 10a and 10b is handled by the reinforcing pipe 5, the steel pipe 2
No excessive bending moment is transmitted to the motor. Further, all the soil under the steel pipe pile 1 is extruded to the side of the steel pipe 2 and is compressed, resulting in high density earth and sand. In addition to the bearing capacity of the bottom face of the steel pipe pile 1, a large bearing capacity due to circumferential friction is generated. can get.

In the above description, the case where the steel plates 10a to 10f are formed by dividing a triangular, quadrangular or hexagonal steel plate into two parts is shown. However, the present invention is not limited to this. The above-mentioned polygonal steel plate may be divided into two to form a steel plate. Furthermore, not only a polygonal steel plate but also a steel plate having an arbitrary shape such as a circular shape or an elliptical shape may be divided to form a flat steel plate. Further, if necessary, the steel plate may be bent, whereby the workability can be improved. Further, in the above description, a case where a steel plate is formed by dividing a steel plate having a polygonal or arbitrary shape into two parts is shown. You may make it attach to the attachment part provided in the front-end | tip part sequentially.

[0036]

(1) The screwed steel pipe pile with wings according to the present invention is formed by dividing a steel pipe having a spirally notched tip and a polygonal steel plate having a larger outer diameter than the steel pipe. Since the steel plate has a steel plate, and a plurality of steel plates are attached to the tip of the steel pipe at an angle, the structure of the steel plate constituting the wing is simple, easy to manufacture, and inexpensive. Can be easily attached and workability can be improved. Further, the steel plate having both the function of closing the bottom surface of the steel pipe and the function of the propulsion wing functions as a support when a vertical force is applied, so that a large supporting force can be obtained.

(2) Instead of the polygonal steel plate of the above (1), a steel plate of an arbitrary shape is divided into a plurality of pieces to form a flat steel plate. Obtainable.

(3) Since the opening formed between the adjacent steel plate and the steel pipe in the above (1) or (2) is closed by a closing member, intrusion of earth and sand into the steel pipe during construction is prevented. At the same time, a larger supporting force can be obtained.

(4) In the vicinity of the tip of the steel pipe to which the steel plate of (1), (2) or (3) is attached, a strength larger than the strength of the reinforcing pipe or the steel pipe having a thickness greater than the thickness of the steel pipe. Therefore, even if a large bending moment is transmitted from the steel plate to the steel pipe, the stress level of the reinforcement pipe can be suppressed to within an allowable value. Further, it is much more economical than a case where the entire length is formed of a thick steel pipe.

(5) Immediately before or after the steel pipe pile driving of the above (1), (2), (3) or (4) is stopped, the solidified material is introduced into the ground from the tip of the steel pipe pile or its vicinity. , And is formed integrally with the steel pipe pile, so that a larger supporting force can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing a tip portion of the steel pipe of FIG.

FIG. 3 is an explanatory view of a steel plate constituting the steel plate of FIG. 1;

FIG. 4 is a perspective view of another example of the first embodiment.

FIG. 5 is a perspective view of still another example of the first embodiment.

FIG. 6 is an explanatory view of a steel plate constituting the steel plate of FIG. 5;

FIG. 7 is an explanatory diagram of a ground reaction force applied to a steel plate.

FIG. 8 is a perspective view of Embodiment 2 of the present invention.

FIG. 9 is an explanatory diagram of Embodiment 5 of the present invention.

FIG. 10 is an explanatory view showing a construction example of a screwed steel pipe pile with wings according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel pipe pile 2 Steel pipe 3 Attachment part 10 Steel plate 11 Opening 12 Closure member 14 Solidified material

Claims (5)

[Claims] 1. A steel pipe having a spirally notched distal end, and a steel plate formed by dividing a polygonal steel plate larger than the outer diameter of the steel pipe into a plurality of steel plates. A screwed steel pipe pile with wings, which is attached to the tip of the steel pipe at an angle. 2. The screwed steel pipe pile with wings according to claim 1, wherein a flat steel plate is formed by dividing a steel plate of an arbitrary shape into a plurality of pieces instead of the polygonal steel plate. 3. The screwed steel pipe pile with wings according to claim 1, wherein an opening formed between an adjacent steel plate and the steel pipe is closed by a closing member. 4. The steel pipe to which a steel plate is attached is constituted by a reinforcing pipe having a thickness greater than the thickness of the steel pipe or a reinforcing pipe having a strength greater than the strength of the steel pipe. Item 4. A screwed steel pipe pile with wings according to item 1, 2 or 3. 5. Immediately before or after the driving of the steel pipe pile, a solidified material is injected into the ground from the tip of the steel pipe pile or in the vicinity thereof to be integrated with the steel pipe pile. The screwed steel pipe pile with wings according to claim 1, 2, 3, or 4.