JP2000136532A - Rotary type press-in sheet pile and construction method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method to construct a sheet pile using a rotary press-in pile, which can provide sufficient support force without making vibration and noise in execution, dismounting and removal. SOLUTION: A rotary press-in pile 2 is contained in a sheath pipe body 6 to form a sheath pipe pile 10a. With the sheath pipe pile 10a standing on the specified ground for setting, the rotary press-in pile 2 is rotated, pressed-in and forced to penetrate in the ground by an auger, and a sheath pipe pile 5 is also pressed-in and forced to penetrate in the ground in the same manner. A sheath pipe pile 10b is put in the ground at a position separated a specified distance from the sheath pipe pile. In this case, penetration is made with pile side support guide sections 9 fitted to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet pile and a method of constructing a sheet pile for forming a wall on the ground such as an earth retaining wall, a water blocking wall, a revetment wall, etc. in a construction work or the like.

[0002] As a prior art, a sheet pile method of driving a sheet pile with a diesel hammer (impact type) or a vibratory hammer (vibration type) to form a wall, a hydraulic press-in method using an earth auger, and Japanese Patent Publication No. 55-30074. There is a method of constructing the retaining wall disclosed.

[0003]

The sheet pile method described in the prior art involves large vibrations and noises at the time of construction, and is very difficult to use in urban areas. A similar problem is required, and a device such as a drawing machine having a sufficient drawing force is required. In addition, the hydraulic press-in method causes a problem of soil removal and slime treatment. The press-fitting equipment becomes larger. In addition, it was difficult to measure whether the required bearing capacity was obtained, and it was difficult to manage the bearing capacity. The method of constructing a retaining wall disclosed in Japanese Patent Publication No. 55-30074 discloses an excavation method in which the lower end is automatically expanded at the time of forward rotation due to the resistance of soil at the time of excavation, and is automatically reduced at the time of reverse rotation. A few small auger shafts with blades are lined up, and they are rotationally press-fitted to the ground to some extent, and the standing auger shafts are covered with steel pipe sheet piles with junctions on both sides.
While the auger shaft is being rotationally press-fitted, the steel pipe sheet pile is also press-fitted at the same time to construct the earth retaining wall. The auger shaft is rotated in the reverse direction to reduce the diameter of the excavation blade to a diameter smaller than the inner diameter of the steel pipe sheet pile and pull out. In the method of constructing the retaining wall, a large amount of earth and sand was pulled up with the drawing of the auger shaft, and this treatment was required. In addition, a pulling device is required to pull out the steel pipe sheet pile from the ground.Because the diameter is large, the resistance becomes large and it becomes a vibration type or impact type pulling device, and it induces vibration and noise pollution, so it is difficult to use in urban areas. there were.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to significantly reduce the generation of vibration and noise when a sheet pile is penetrated and withdrawn and removed, and An object of the present invention is to provide a sheet pile and a method of constructing a sheet pile that can be improved to obtain a large bearing capacity, can be constructed in a short time, and can be used as a permanent pile.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a rotary press-fitting pile according to the present invention comprises a rotary press-fitting pile main body provided with excavating blades for excavating the ground at a lower end, and the pile main body rotatably housed. The pile body and a sheath pipe sheet pile forming a double pipe, and as the pile body is rotationally press-fitted into the ground in a forward rotation, the sheath pipe sheet pile penetrates the ground without rotating,
Appropriate parts on the outer surface of the pile body above the excavation blades so that the sheath pipe sheet pile is pulled out with the pile body without rotating as the pile body is pulled out from the ground by rotating the pile body in the reverse direction. Further, a pressing means and a support / pulling-out means for the sheath pipe sheet pile are provided.

Further, the pile body includes a pile main body having excavating blades at the lower end for excavating the ground, joints for supporting and guiding a non-rotating sheet pile penetrating into the ground along the pile main body, a protrusion guide, a protrusion groove, and the like. A pile main body side support guide may be provided on a side portion of the pile main body. The “non-rotating sheet pile” refers to a sheet pile composed of a plate-shaped member, a substantially U-shaped plate member, an H steel member, a steel pipe member, and the like.

Further, the sheath pipe sheet pile of the present invention includes a pile body having excavating blades for excavating the ground, rotatably housed, and forms a double pipe with the pile body. A sheet pile part provided on a side part of the sheet pile body, and a sheet pile side support guide part comprising a joint, a projection guide, a projection groove, and the like, provided on a side part of the sheet pile part opposite to the sheath tube; As the pile body is rotationally press-fitted into the ground, the sheath pipe sheet pile body and the sheet pile portion penetrate the ground without rotation, and the sheath pipe sheet pile body is pulled out of the ground by rotating the pile body in the reverse direction. The pressing means and the supporting / pulling-out means for the sheath pipe sheet pile body and the sheet pile portion are provided on the upper outer surface of the excavating blade so that the sheet pile portion and the sheet pile portion are pulled out without rotation.

A pile body having excavation blades for excavating the ground is rotatably housed on a side portion of a sheath pipe sheet pile body forming a double pipe with the pile body, along a side of the sheath pipe sheet pile body. A sheath pipe sheet pile provided with a sheath pipe-side support guide portion composed of a joint, a projection guide, a projection groove, and the like for supporting and guiding a non-rotating sheet pile penetrating into the ground may be provided on a side portion of the sheath pipe sheet pile main body. .

A non-rotating sheet pile-side connecting portion is provided on both sides of the non-rotating sheet pile, and the non-rotating sheet pile-side connecting portion does not come off from the pile body side supporting guide portion, the sheet pile side supporting guide portion, or the sheath tube side supporting guide portion. A rotary press-fitting sheet pile characterized by being connected as described above may be used.

[0010] Further, a pressing means for applying a load for rotationally press-fitting the pile body to the sheath pipe sheet pile is provided above the excavating blade so that the sheath pipe sheet pile is pressed into the ground together with the rotation press-fitting of the pile body. When the lowering of the sheet pile is stopped and the pile body is pulled out by rotating the pile body in the reverse direction, a support / pulling means for applying a supporting / pulling force to the sheath pipe sheet pile for pulling out the sheath pipe sheet pile together is provided above the excavating blade. Pressed sheet piles are also good. "Pressing means, bearing / pulling-out means" includes various types of flanges, such as flanges, protrusions, ribs, ring members, flange members, etc. There are shapes, which are fixed to the pile body outer surface and transmit the load from the auger to the sheath pipe sheet pile.

A method of constructing a rotary press-fitted sheet pile is provided by rotatably storing a pile body having an excavating blade for excavating the ground and a pressing means and a support / pulling-out means on an upper outer surface of the excavating blade. And a sheath sheet pile body forming a double pipe, a sheet pile part provided on a side part of the sheath pipe sheet pile body, and a joint or projection guide provided on a side part of the sheet pile part opposite to the sheath pipe. As the rotary press-fitting sheet pile comprising a sheet pile-side support guide portion comprising a groove and a projecting groove, etc., rotationally press-fits the pile body into the ground, the pressing means and the support / pulling-out means make the sheath pipe sheet pile body and sheet pile part non- As it rotates, it penetrates the ground,
As the pile body is reversely rotated and pulled out from the ground, the sheath pipe sheet pile body and the sheet pile portion are pulled out without rotation.

Further, a non-rotating sheet pile having a non-rotating sheet pile-side connecting portion on both sides is connected to a pile body-side supporting guide section, a sheet pile-side supporting guide section, or a sheath pipe-side supporting guide of a rotary press-inserted sheet pile that is rotationally press-fitted into the ground. With the rotary press-fitting sheet pile being rotationally press-fitted into the ground, or after being rotationally press-fitted, the non-rotating sheet pile is guided into the rotary press-fitting sheet pile and penetrates the ground. A method of constructing a rotary press-fitted sheet pile is also possible. `` The non-rotating sheet pile is penetrated into the ground, '' and in many cases, the press-fitting method is free from vibration and noise, such as the soft layer of the ground, but the penetration into the support layer and the hard layer is a vibration type or a hammer impact type Or a combination of these, and these are also included.

[0013]

Embodiments of the present invention will be described with reference to the drawings. <First Embodiment> FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a partial longitudinal sectional view of the same first embodiment, and FIG. 3 is a rotary press-fitting pile and a sheath tube of the same first embodiment. 3A and 3B are a cross-sectional view and a partial vertical cross-sectional view illustrating an example of a state in which a gap is filled with a filler. The rotary press-fitting sheet pile 1 is provided with excavating blades 3 on the outer side of the lower end of a steel pipe pile body 2, and a bearing / pull-out flange 4 on the upper outer surface of the excavating blades 3. In this embodiment, the excavating blades 3 are about 2.5 to 3 times as large as the pile body 2 and about 1.5 to 2 times as large as the conventional technique. Sheath pipe sheet pile 5 containing rotatable press-fit pile 1 rotatably
Is composed of a sheath pipe sheet pile body 6 which is a sheath-shaped double pipe of the rotary press-fitting pile 1 and a sheet pile part 7 made of a steel plate material adhered to a side thereof, and a side opposite to the sheet pile part 7. At the end, a sheet pile-side support guide section 9 is provided in which a side end of the sheath pipe sheet pile section 8 is fitted. Rotating press-fitting pile main body 2 is sheathed sheet pile 5
The sheath pipe sheet pile 10a which is a double pipe is formed.
The sheath pipe sheet pile 10a is set upright on a predetermined ground, and the rotary press-fitting pile main body 2 is rotationally press-fitted with an auger (not shown) to penetrate the ground, and the sheath pipe sheet pile 5 (non-rotating) is similarly press-fitted. And let it penetrate. In this case, the press-fitting of the sheath pipe sheet pile portion depends on the load of the auger and the press-fitting of the rotary press-fitting pile, but an auxiliary press-fitting means may be used if necessary. Sheath pipe sheet pile 10
b is penetrated into a position at a predetermined distance from the sheath tube sheet 10a. At this time, the sheet pile portion 8 is fitted to the sheet pile side support guide portion 9 for the operation. When the formed sheet pile wall is to be used as a permanent earth retaining material as it is, the bottom of the gap between the rotary press-fitting pile body 2 and the sheath pipe sheet pile 5 is closed with the base plate 12 in advance, and after the penetration is completed, the filler 11 such as mortar is completely filled. Stuff. As a result, water is prevented from entering, and a strong pile structure and a highly corrosion-resistant column are formed by the filler that is hardly resistant to corrosion. The sheath pipe sheet pile body 6 and the sheet pile part 7 are separated, and a sheet pile supporting part is provided on the side of the sheath pipe body 6, and after the sheath pipe body 6 penetrates into the ground, the sheet pile is penetrated between the plurality of sheath pipe bodies 6. It is also good to form a wall. In the following description, the same components are denoted by the same reference numerals, and description thereof will be omitted.

<Second Embodiment> FIG. 4 is a perspective view showing a second embodiment of the present invention, and FIG. 5 is a partial longitudinal sectional view of the same second embodiment. The sheath pipe sheet pile 14 includes a rotary press-fit pile main body 15 and a sheath pipe sheet pile 16. The rotary press-fitting pile main body 15 has a configuration in which the excavating blades 3 are provided on the outside of the lower end of the steel pipe-made pile main body 2. Sheath pipe sheet pile 1 serving as sheath of rotary press-fitting pile main body 15
6 is provided with sheet pile members 7 and 8 made of sheet steel on opposite sides of a sheath pipe sheet pile main body 6 made of steel pipe, and a side end of the sheet pile portion 8 is fitted to a side end of the sheet pile portion 7. Sheet pile support guide 9
Is provided, and a base plate 12 is provided at the lower end of the sheath tube so that earth and sand do not enter the gap between the rotary press-fitting pile 15 and a filler is filled after press-fitting.

<Embodiment 3> FIG. 6 is a plan view showing a relationship between a sheath frame and a conductive frame when a sheath pipe sheet pile is penetrated according to a third embodiment of the present invention, and FIG. It is a plane which shows the connection state of a pipe sheet pile. Guide frame 20 in the formation direction of the sheet pile wall,
21 are provided at appropriate intervals. Guide frames 23 and 24 having a joint guide portion provided with a joint guide portion 22 at a portion (set portion) into which the pile is driven are fixed at predetermined intervals. 23,
Reference numeral 24 is removable or movable. Sheet pile portions 26 and 27 are welded to opposite sides of the sheath pipe sheet pile main body 30 of the sheath pipe sheet pile 25, and joints 28 and 29 are provided at ends of the sheet pile portions 26 and 27. Guide frame 20,
The sheath pipe sheet pile 25 is set to 21 so that the joints 28 and 29 fit into the joint guide portion 22, and the sheath pipe sheet pile 25 is penetrated. Thereby, the sheet pile main body 30 penetrates in a predetermined direction. FIG. 7 shows that the joints 28 and 29 are fitted to
7 shows a state in which the sheath pipe sheet pile has penetrated so as to connect 7. In order to improve the water stoppage, the joint portion is basically made of a high-strength bolt, and a sealing material is attached to the gap at the site. All the joints described below have the same configuration as necessary.

<Embodiment 4> FIG. 8 is a plan view showing various structures of a joint provided on a sheet pile according to Embodiment 8 of the present invention. The joint structure is not limited to FIGS. A, B, and C, and various structures are possible as long as they have excellent connectivity and waterproofness.

<Fifth Embodiment> FIG. 9 is a perspective view showing a fifth embodiment of the present invention, and FIG. 10 is a plan view showing the same fifth embodiment. The sheath pipe sheet pile 33 made of a steel pipe is provided with a drilling blade 3 at the lower end of a rotary press-fitting pile main body 34 and a sheet pile side support guide formed by welding a rod member for supporting and guiding a non-rotating sheet pile 35 made of H steel on the outside of the side. The parts 36 are provided on opposite sides so as to be located inside the non-rotating sheet pile 35. A plurality of sheath pipe sheet piles 33 are penetrated into the ground at predetermined intervals, and a non-rotating sheet pile 35 is press-fitted between the sheath pipe sheet piles 33 and 33 while being supported and guided by a sheet pile side support guide portion 36, and driven. Go out. Depending on the condition of the ground, vibration or impact is also used. Above the excavation blades 3 of the rotary press-fitting sheet pile 33, the lowering of the non-rotating sheet pile 35 is stopped below the sheath pipe sheet pile main body 35, and the non-rotating sheet pile 35 is simultaneously rotated when the sheath pipe sheet pile 33 is reversely pulled out. A support / pull-out flange 4 is provided to enable pull-out.

<Sixth Embodiment> FIG. 11 is a plan view showing a sixth embodiment of the present invention. In the plurality of sheath pipe sheet piles 38, the non-rotating sheet pile 3 made of H steel is provided between the sheath pipe sheet pile bodies 39.
5 is attached, and forms a sheet pile wall as it is. In addition, the combination using only the rotary press-fitting pile main body 2 and the sheet pile 35 can be manufactured at the lowest cost.

<Seventh Embodiment> FIG. 12 is a plan view showing a seventh embodiment of the present invention. Rotary press-fit pile body 4 made of steel pipe
1 is provided with a rotary press-fitting pile main body-side connecting portion 42 which is vertically opened and cut vertically downward on opposite side portions, and a U-shaped steel 43 is welded to the inside of the connecting portion 42. is there. The non-rotating sheet pile 44 is made of a steel plate member, and a non-rotating sheet pile-side connecting portion 45 is provided at both ends.
5 is inserted into the inside of the pile main body side connection portion 42 and penetrates into the ground together with the rotary press-fitting pile main body 41 by the pressing flange 18.

<Eighth Embodiment> FIG. 13 is a plan view showing an eighth embodiment of the present invention. Rotary press-fit pile body 4 made of steel pipe
Numeral 7 is provided with a pile main body side support guide 48 made of a protruding member having a joint formed at the tip on both opposing sides. The sheet pile 49 is made of a substantially U-shaped steel material, and both ends are slightly bent outward to fit into the pile body side support guide portion 48.

<Ninth Embodiment> FIG. 14 is a plan view showing a ninth embodiment of the present invention. Rotary press-fitting pile body 6 made of steel pipe
Reference numeral 0 denotes a pile-body-side support guide 61 made of a plate-like member for supporting and guiding the non-rotating sheet pile 35 made of H-steel from the inside on opposite sides. A stopper 62 for preventing lateral movement of the sheet pile 35 is provided outside the base of the support guide section 61.

<Tenth Embodiment> FIG. 15 is a plan view showing a tenth embodiment of the present invention. The non-rotating sheet pile 64 is formed by bonding U-shaped members 66 to both ends of a plate member 65 by welding. The U-shaped member 66 hits the rotary press-fitted sheet pile main body or the sheath pipe sheet pile main body and is supported and guided, and the sheet pile 64 penetrates.

<Eleventh Embodiment> FIG. 16 is a plan view showing an eleventh embodiment of the present invention. The non-rotating sheet pile 68 is provided by welding a curved plate 69 having the same curved surface as the outside of the pile main body 2 or the sheath pipe sheet pile main body 39 on both ends of the plate member 65. The curved plate 69 hits the rotary press-fitting pile or the sheath tube sheet pile main body and is supported and guided to penetrate.

<Twelfth Embodiment> FIG. 17 is a plan view showing a twelfth embodiment of the present invention. The rotary press-fitting sheet pile main body 2 or the sheath pipe sheet pile main body 71 is provided with a sheet pile side support guide portion 72 formed by cutting the side of a pipe on the opposite side of the sheath pipe sheet pile main body 39. The non-rotating sheet pile 73 is made of a substantially U-shaped steel material, and has both ends bent outward to be fitted into the sheet pile-side support guide section 72 so as to be hard to come off.

[0025]

According to the invention of the rotary press-fitting sheet pile and the method of constructing the sheet pile, a pressing flange and a support / pull-out flange for penetrating and pulling out a sheath tube or a sheet pile together with the pile body and pulling out the pile body above the excavating blade are provided. Since it is provided so that the sheath tube or the sheet pile can be penetrated and pulled out together with the rotary press-fitting of the rotary press-fitting pile, the following effects are commonly achieved. 1. Since the sheath tube and sheet pile are often pressed into the ground together with the rotary press-fitting of the rotary press-fitting pile, there is no generation of vibration and noise associated with the construction, and it is very suitable for construction in urban areas. 2. When the rotary press-fitting pile is reversely rotated by the pull-out flange to perform a pull-out operation, the flange supports and lifts the sheath tube or the sheet pile from below, so that the sheet pile can be easily pulled out and removed without vibration or noise. Since pulling out one rotary press-fitting pile is an operation of simultaneously extracting both sheet piles (two sheet piles), the work efficiency is good and the dismantling and removal work can be performed in a short time. 3. The soil excavated to the outside of the sheath pipe by the excavation blades is forcibly ejected, so that no residual soil is generated. Also, the forcibly ejected soil compacts the stratum around the piles and sheet piles. Strong support is obtained. 4. Since the rotary press-fitting pile can be easily penetrated (penetrated) into the support layer of the ground, stronger supporting force for the pile and the sheet pile can be obtained. In addition, the measurement of the auger torque enables the necessary support force to be managed.

According to the invention of the sheath pipe sheet pile, the sheet pile portion can be accurately and reliably pressed into the ground together with the rotary press-in pile. Further, since the sheet pile portion and the rotary press-fitting pile are integrally connected, the constructed sheet pile wall is strong. In addition, by making the diameter of the excavating blade large, the press-in force by forward rotation and the pull-out force by reverse rotation become strong, and the sheath tube or sheet pile is pressed in by the press-in of the rotary press-in pile (same for pulling out).
This makes it possible to realize a large compaction of the ground and facilitate penetration of the steel pipe sheet pile. The large diameter of the excavating blades agitates the soil immediately below the sheet pile and consolidates it around the sheet pile, making it easier to press-fit large-diameter steel pipe sheet piles without changing the equipment. Alternatively, it becomes possible by adding or changing a simple device. When a permanent earth retaining wall (permanently used) is used, a gap between the rotary press-fitting pile and the sheath pipe is filled with a filler to form a tough sheet pile wall having high waterproofness and corrosion resistance. Further, in a place where the ground is soft, the consolidation state and the supporting force of the ground can be maintained by the rotary press-fitting pile. Also, since sheath pipes of various thicknesses can be used, a large formation can be compacted according to the condition of the ground.

According to the invention of a sheath pipe with a sheet pile support guide portion, sheet piles having different shapes and configurations can be properly used in accordance with construction conditions, and a double pile is first penetrated into the ground, and then the sheet pile is inserted. It is possible to press-fit, pull out only the penetrated sheet pile, or replace only the sheet pile.

The invention of the method of constructing a sheet pile exerts the same effect as the effect of the above-mentioned invention, and therefore the description is omitted. The method of constructing a sheet pile in which a guide portion is provided directly on a rotary press-fitting pile or a sheath tube can be made at the lowest cost.

[Brief description of the drawings]

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

FIG. 2 is a partial vertical sectional view of the first embodiment of the present invention.

FIGS. 3A and 3B are a cross-sectional view and a partial vertical cross-sectional view illustrating an example of a state in which a filler is filled in a gap between the rotary press-fitting pile and the sheath tube according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing Embodiment 2 of the present invention.

FIG. 5 is a partial longitudinal sectional view of a second embodiment of the present invention.

FIG. 6 is a plan view showing a relationship with a guide frame when a sheath pipe sheet pile according to Embodiment 3 of the present invention is penetrated.

FIG. 7 is a plan view showing a connected state of a sheath pipe sheet pile according to Embodiment 3 of the present invention.

FIG. 8 is a plan view showing various structures of a joint provided on a sheet pile according to Embodiment 8 of the present invention.

FIG. 9 is a perspective view showing Embodiment 5 of the present invention.

FIG. 10 is a plan view showing a fifth embodiment of the present invention.

FIG. 11 is a plan view showing a sixth embodiment of the present invention.

FIG. 12 is a plan view showing a seventh embodiment of the present invention.

FIG. 13 is a plan view showing Embodiment 8 of the present invention.

FIG. 14 is a plan view showing a ninth embodiment of the present invention.

FIG. 15 is a plan view showing a tenth embodiment of the present invention.

FIG. 16 is a plan view showing an eleventh embodiment of the present invention.

FIG. 17 is a plan view showing a twelfth embodiment of the present invention.

[Explanation of symbols]

 1 ··· Rotating press-fitting sheet pile 2 ···· Rotating press-fitting pile body 3 ···· Drilling blade 4 ···· Supporting / pulling-out flange 5 ···· Sheet pipe sheet pile 6 ··· Sheath pipe sheet pile body 7 ···· Sheet pipe sheet pile sheet pile part 8 ···· Sheet pipe sheet pile sheet pile part 9 ···· Sheet pipe sheet pile sheet pile side support guide part 10a ····· 10b ··· Sheath pipe sheet pile 11 ···· Filler 12 ··· Base plate 14 ··· Sheath pipe sheet pile 15 ··· Rotating press-fitting pile body 16 ··· Sheath pipe Sheet pile 18 ····· Pressing flange 19 ······· Pressing flange 20 ········································ Guide frame with joint guide part 24 ... Guide frame with joint guide part 25 ... Sheath pipe sheet pile 26 ... Sheath pipe sheet pile sheet pile part 27 ... ..Sheet pipe sheet pile sheet pile part 28 ... Joint 29 ... Joint 30 ... Sheet pipe sheet pile main body 33 ... Shell pipe sheet pile 34 ... Pile body 35. ··· Non-rotating sheet pile 36 ··· Sheet pile side support guide part 38 ··· Sheath pipe sheet pile 39 ··· Sheath pipe sheet pile main body 41 ··· Pile body 42 ···・ Pile body side connection part 43 ・ ・ ・ ・ ・ U-shaped steel 44 ・ ・ ・ ・ ・ Non-rotating sheet pile 45 ・ ・ ・ ・ ・ Non-rotating sheet pile side connection part 47 ・ ・ ・ ・ ・ Pile body 48 ・ ・ ・ ・・ Pile body side support guide part 49 ・ ・ ・ ・ ・ Non-rotating sheet pile 60 ・ ・ ・ ・ ・ Pile body 61 ・ ・ ・ ・ ・ Pile body side support guide part 62 ・ ・ ・ ・ Stopper 64 ・ ・ ・ ・ ・ Pile 65 plate member 66 .. U-shaped member 68 .. sheet pile 69... Curved plate 71... Pile pile sheet 72. Supporting guide portion 73 ..... irrotational sheet pile

Continued on the front page (72) Inventor Akira Komatsu 2-6-3 Otemachi, Chiyoda-ku, Tokyo New Nippon Steel Corporation F-term (reference) 2D049 EA02 EA03 EA05 FA04 FB03 FB14 FC02 FC03 FD04 FE02 2D050 AA06 BB07 CB04 CB06 DB01

Claims (8)

[Claims] 1. A pile body comprising: a rotary press-fitting pile body provided with excavating blades for excavating the ground at a lower end; and a sheath pipe sheet pile for rotatably storing the pile body and forming a double pipe with the pile body. As the main body is rotationally press-fitted into the ground in a forward rotation, the sheath pipe sheet pile penetrates the ground without rotating, and as the pile body is reversely rotated and pulled out of the ground, the sheath pipe sheet pile is removed. A pressing means and a support / pulling-out means for the sheath pipe sheet pile are provided at an appropriate position on the outer surface of the pile body above the excavation blade so that the pile body is pulled out together with the pile body without rotating. And rotary press-fitting sheet pile. 2. A pile body having excavating blades at the lower end for excavating the ground, a joint for supporting and guiding a non-rotating sheet pile penetrating into the ground along the pile body, a projection guide, a projection groove and the like. A rotary press-fitted sheet pile, wherein a pile body side support guide is provided on a side portion of the pile body. A pile body having excavating blades for excavating the ground is rotatably housed, and a sheath pipe sheet pile body forming a double pipe with the pile body is provided on a side portion of the sheath pipe sheet pile body. A sheet pile portion, and a sheet pile side support guide portion, which is provided on a side of the sheet pile portion opposite to the sheath tube, and includes a joint, a projection guide, a projection groove, and the like, and rotationally press-fits the pile body into the ground. With the above, the sheath pipe sheet pile body and the sheet pile part penetrate the ground without rotating, and as the pile body is rotated in the reverse direction and pulled out from the ground, the sheath pipe sheet pile body and the sheet pile part are pulled without rotating. 2. The sheath pipe sheet pile according to claim 1, wherein a pressing means and a supporting / pulling means for the sheath pipe sheet pile body and the sheet pile portion are provided on an upper outer surface of the excavating blade so as to be pulled out. 4. A pile body having excavating blades for excavating the ground is rotatably housed on a side portion of a sheath pipe sheet pile body forming a double pipe with the pile body, along the sheath pipe sheet pile body. A sheath tube-side support guide portion comprising a joint, a projection guide, a projection groove and the like for supporting and guiding a non-rotating sheet pile penetrating into the ground is provided on a side portion of the sheath pipe sheet pile main body. Item 5. A sheath tube sheet pile according to item 3. 5. A non-rotating sheet pile-side connecting portion is provided on both sides of the non-rotating sheet pile, and the non-rotating sheet pile-side connecting portion does not come off from the pile body side supporting guide portion, the sheet pile side supporting guide portion, or the sheath tube side supporting guide portion. 2. The connection according to claim 1,
A rotary press-fit sheet pile according to 2, 3 or 4. 6. A pressing means for applying a load for rotationally press-fitting the pile body to the sheath pipe sheet pile is provided above the excavating blade so that the sheath pipe sheet pile is pressed into the ground together with the rotation press-fitting of the pile body. A support / pulling-out means for applying a supporting / pulling force to the sheath pipe sheet pile for pulling out the sheath pipe sheet pile together when stopping the lowering of the sheet pile and pulling out the pile body by rotating the pile body in the reverse direction is provided above the excavating blade. The rotary press-fit sheet pile according to claim 1 or 3, characterized in that: 7. A sheath for rotatably storing a pile body having an excavating blade for excavating the ground and a pressing means and a support / pulling-out means on an upper outer surface of the excavating blade to form a double pipe with the pile body. A pipe sheet pile main body, a sheet pile portion provided on a side portion of the sheath pipe sheet pile main body, and a sheet pile side comprising a joint, a protrusion guide, a protrusion groove, and the like provided on a side of the sheet pile portion opposite to the sheath tube. As the rotary press-fitting sheet pile composed of the supporting guide portion is rotationally press-fitted into the ground, the pushing means and the support / pulling-out means cause the sheath pipe sheet pile main body and the sheet pile part to penetrate the ground in a non-rotating manner. And a method of constructing a rotary press-fitting sheet pile in which the sheath pipe sheet pile body and the sheet pile portion are pulled out in a non-rotational manner as the pile body is pulled out of the ground by rotating the pile body in the reverse direction. 8. A non-rotating sheet pile having a non-rotating sheet pile-side connecting portion on both sides thereof, a pile body side supporting guide section, a sheet pile side supporting guide section, or a sheath pipe side supporting guide of a rotary press-inserted sheet pile that is rotationally pressed into the ground. With the rotary press-fitting sheet pile being rotationally press-fitted into the ground, or after being rotationally press-fitted, the non-rotating sheet pile is guided into the rotary press-fitting sheet pile and penetrates the ground. Construction method of rotary press-fitting sheet pile.