JPH0617576B2 - Steel pipe pile - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] Piles in various civil engineering or construction works.

[Conventional technology]

In the past, burying work for piles during civil engineering or construction work was mainly placing due to the form of the piles.

[Problems to be solved by the invention]

Noise pollution occurs due to the construction work, various methods for
Although a device and the like were considered, it was not possible to completely prevent noise generation because it was driving.

[Means for solving problems]

A compression body is provided at the rear end of the pile body in which spiral-shaped cutting blades are provided on the outer circumference and the inner circumference of the steel pipe.

[Action]

The spiral advancing blades provided on the outer and inner circumferences of the steel pipe serve as propulsion blades, and by rotating the pile body,
At the same time as the pile body digs along the surface of the ground due to the weight of the pile body, the earth and sand excavated by the compression body provided at the rear end of the pile is compressed in the opposite direction, and burial work and restoration work can be performed simultaneously at the same time. It has an effect.

〔Example〕

To explain further about one embodiment shown in the drawings, drilling devices 4, 5 such as drilling blades or drilling screws are provided spirally on the outer circumference 2 and the inner circumference 3 of the tubular body 1 of the steel pipe pile, It is formed with a screw pitch 7 that is narrower than the screw pitch 6 of the excavation device 4 such as a spiral excavation blade or excavation screw provided at the front end at the rear end, or with a gentle reverse pitch (not shown). A pressure body 8 formed or formed of a brim-shaped pressing body (not shown) or the like.
Is provided to form the steel pipe pile 9. Thus, the tips of the excavation devices 4, 5 provided in a spiral shape are formed so as to slightly project from the tip portion 1'of the tube body 1, and the excavation devices 4, 5 are formed.
By forming the tip portion 10 of the blade into a cutting edge shape or a pointed shape 11, the excavation effect can be further enhanced. If necessary, the steel pipe pile having a large inner diameter is provided with the compression body 8 also on the inner peripheral portion of the rear end thereof.

Further, the excavation device 4, which is provided so as to project from the tip of the pipe body 4,
The space formed between the tip portion 10 of 5 and the tube body tip portion 1'is filled with a wall plate 12 to form an auxiliary wall for excavation to prevent trapping of stones and the like in the excavation tool. You can Further, by forming the tip of the wall plate 12 on the cutting edge 13, the excavation effect can be further enhanced. Reference numeral 14 in the drawing is an arc-shaped portion provided at the blade edge 13 portion at the tip of the wall plate 12. Thus, the excavation devices 4 and 5 are provided at least at the tip of the steel pipe pile, but may be further provided at the intermediate portion or at the tip portion and the vicinity of the intermediate portion or the rear end portion, if necessary. Further, the tip 10 of the excavation device is formed in a flat plate-like spoon shape or semi-elliptical shape 15 and the like, and the tip is formed in a blade shape or a point shape, and the two tips are provided in a spiral shape along the direction of excavation chisel. Is effective.

〔The invention's effect〕

Since the present invention is constructed as described above, depending on the geology, after the preliminary excavation, the tip is attached to the surface of the earth, auger, a construction machine having a rotating device such as a drill pillar, or other desired rotating device. By supporting and rotating the pile upright, the pile body is naturally buried in the ground as if it were a screw nail, and the excavated earth and sand is piled up by the spiral chisel blade or chisel screw and the weight of the pile body. Not only does the effect of two birds with one stone being compressed by the compression body provided at the rear end of the stone and being simultaneously backfilled, but since it is not laid, it produces almost no noise, and pollution-free burial can be performed. It can be effective.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a front perspective view, FIG. 2 is a partial explanatory view, and FIG. 3 is A in FIG.
-A line sectional drawing, a longitudinal sectional view, and Drawing 4 are explanatory views of a tip part. 1 ... tube, 2 ... outer circumference, 3 ... inner circumference, 4,5 ... digging device, 6,7 ... screw pitch, 8 ... compression body, 9 ... steel pipe pile, 10 ... digging The tip of the device, 11 ... Cutting edge or pointed shape, 12 ... Wall plate.

Claims (11)

[Claims] 1. A drilling device such as a chisel blade and a chisel screw is provided in a spiral shape on the outer periphery of a pipe body, and a screw pitch narrower than the screw pitch of the drilling device is formed at the rear end of the pipe body. A steel pipe pile, characterized in that it is provided with a digging device such as a pressing body having a gradual reverse pitch, and a compression body having a different screw pitch interval. 2. An excavating blade on each of the outer peripheral surface and the inner peripheral surface of the pipe body,
A digging device such as a digging screw is provided in a spiral shape, the tip of the digging device is projected from the tip of the pipe body, and the protruding end is formed in a blade shape or a tip, and between the tip and the tip of the pipe body. A steel pipe pile characterized in that a digging assisting wall is provided in the resulting space, and a compression body formed at a rear end of the tubing so as to have a different interval from the digging device. 3. The steel pipe pile according to claim 1, wherein the excavation device is provided only at the tip of the pipe body. 4. The steel pipe pile according to claim 2, wherein the excavation device is provided only at the tip of the pipe body. 5. The steel pipe pile according to claim 1, wherein the excavation device is provided at a tip end portion and an intermediate portion of the pipe body. 6. The steel pipe pile according to claim 2, wherein the excavation device is provided at the tip and the middle of the pipe body. 7. The steel pipe pile according to claim 1, wherein the excavation device is provided up to the vicinity of the pressure body at the front end portion, the intermediate portion and the rear end portion of the pipe body. 8. The steel pipe pile according to claim 2, wherein the excavation device is provided up to the vicinity of the pressure body at the front end portion, the intermediate portion and the rear end portion of the pipe body. 9. The steel pipe pile according to claim 2, wherein the tip of the excavation-assisting wall has a blade shape. 10. The steel pipe pile according to claim 1, characterized in that a plurality of the excavation devices are provided in a spiral shape along the direction of rotation of the excavator. 11. The steel pipe pile according to claim 2, wherein a plurality of the excavation devices are provided in a spiral shape along the direction of rotation of the chisel.