JP2016017385A - Underground penetration device for steel pipe pile having tip blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underground penetration device for a steel pipe pile that places a steel pipe pile into a ground by rotary penetration, the steel pipe pile having a tip blade that combines two flat blades for excavation.SOLUTION: An underground penetration device for a steel pipe pile having a tip blade includes a tightening/loosening motion part S installed on an all-around rotation jack K for tightening and loosening a steel pipe pile, and a jack liner J installed between the tightening/loosening motion part and a steel pipe pile P having a tip blade 21 formed by abutting two slanted semicircular flat blades 22 in an X- or a V-shape. The Jack liner J is configured with a plurality of split pieces in a way that allows tightening and loosening of the steel pipe pile, and has an insertion hole for the steel pipe pile P formed at a center. Furthermore, a spiral groove is formed on an inner peripheral surface of the insertion hole, into which each of the two semicircular blades 22 is inserted, the semicircular blades being combined in an X- or a V-shape by abutting edges that face each other. An insertion port of the spiral groove is formed on a surface of the jack liner, facing a direction of rotation of the X- or V-shaped two semicircular flat baldes 22.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a steel pipe pile penetration device with a tip wing for penetrating a steel pipe pile with a semicircular flat blade attached to the tip thereof in a slanting manner and constructing a foundation pile in the soil.

Conventionally, a steel pipe pile used to construct a foundation pile in the soil by screwing a steel pipe pile attached with a drilling blade such as a spiral blade or an inclined semicircular flat blade at the tip while rotating into the soil. The penetrating device (all-round rotating jack) has a steel pipe pile with a tip wing set in the vertical direction at the center of the device, and the steel pipe pile peripheral surface is tightened and rotated via a jack liner by a rotary excavation mechanism arranged in the circumferential direction of the steel pipe pile. It is configured to penetrate the steel pipe pile into the soil and construct the foundation pile.
In order to construct a foundation pile by penetrating the steel pipe pile into the soil in this way, be sure to place a jack liner divided into a plurality of parts on the peripheral surface of the steel pipe pile body so as to surround the steel pipe pile and rotate it. It is necessary to apply a tightening stress to the jack liner from the circumferential direction by the mechanism so that the rotational stress from the rotary excavation mechanism is sufficiently transmitted to the steel pipe pile.

Japanese Patent No. 3484653

As described above, a jack liner is interposed between the circumferential surface of the steel pipe pile and the rotary excavation mechanism in order to transmit the rotary excavation stress to the steel pipe pile attached with a spiral blade or an inclined semicircular flat blade at the tip. In particular, it must be constructed so that torque from the rotary excavation mechanism can be transmitted to the steel pipe pile.
Therefore, when setting the steel pipe pile with the tip wing at the center of the all-around rotating jack, the excavation wing at the tip is much larger than the diameter of the steel pipe pile body, so the steel pipe pile is set in the vertical direction first. After that, it becomes a procedure to attach the jack liner to the steel pipe pile peripheral surface.
In order to follow these procedures, it takes time to place a separately prepared jack liner around the steel pipe pile after setting the steel pipe pile at the center of the all-round rotating jack, and after excavation, the jack liner is divided. After that, the steel pipe pile is detached and then post-processing such as maintenance and movement of the all-round rotating jack is performed.
In other words, every time drilling work with steel pipe piles, it is necessary to assemble and install the divided pieces of jack liners, which are heavy metal objects. As a result, there was a need to improve jack liners immediately.
From such a viewpoint, a tuping device as disclosed in Patent Document 1 has been proposed.
In this technology, a spiral groove is engraved on the inner peripheral surface of the insertion hole of the jack liner that has an insertion hole that is slightly larger in diameter than the diameter of the steel pipe pile body, and the jack liner divided into a plurality of parts is rotated all around. After assembling and mounting to the jack, the spiral blade at the tip of the steel pipe pile is rotated and screwed along the spiral groove on the inner peripheral surface of the jack liner, and after passing through the jack liner, the steel pipe pile body is tightened with the jack liner. It is configured to perform excavation work by being rotated by an all-around rotating jack, and therefore, there is an advantage that the jack liner need not be disassembled and assembled every time excavation work is performed.
However, the spiral wing shape at the tip of the steel pipe pile used in this technique must be a spiral blade shape having a spiral curved surface that can pass along the inner peripheral spiral groove of the jack liner. Therefore, for example, a blade combining “two semicircular flat blades” in an X shape when viewed from the side, or a blade combining “two semicircular flat blades” in a V shape when viewed from the side (registered trade name: Tsubasa Pile) Could not be used.
That is, a steel pipe pile having a tip wing constituted by a combination of two flat flat blades at the tip excavation blade is smoothly rotated while rotating on the jack liner having the inner peripheral surface spiral groove on the inner peripheral surface. The jack liner has a drawback that it cannot be used for the spiral groove of the jack liner because it cannot be screwed.
The present invention enables a steel pipe pile tip to be smoothly penetrated into an inner circumferential spiral groove and smoothly passed along the spiral groove, despite the structure in which the excavation blade at the tip of the steel pipe pile is combined with a flat flat blade. The present invention provides an underground penetration device for steel pipe piles with tip wings.

  The present invention has a tightening / relaxation operating portion that is provided on an all-round rotating jack and performs a tightening / relaxing operation of a steel pipe pile, and a tip wing that is configured by abutting two semicircular blades in an X shape or a V shape in a butting manner. A steel pipe pile with a tip wing provided with a jack liner between the steel pipe piles, and the jack liner is divided into a plurality of pieces and can be tightened and loosened with respect to the steel pipe pile. An insertion hole for a steel pipe pile is provided, and each of the two semicircular blades combined in an X shape or a V shape with the opposite edges abutting each other on the inner peripheral surface of the insertion hole is screwed. A spiral groove to be inserted is engraved, and a screw start end of the spiral groove is provided on the surface of the jack liner so as to face the rotational direction of two X-shaped or V-shaped semicircular blades. Provide an underground penetration device for steel pipe pile with tip wing.

  In addition, the tip wings that have two semicircular blades reversely inclined in an X shape and the opposite edges are configured to abut each other are formed as two semicircular flat blades, but the straight opposed edges are abutted to each other. The tip wing is configured to be inclined and configured in an X shape in a side view.

  Further, the tip wing constructed by reversely inclining the two semicircular blades in a V shape and having the opposed edges abutted to each other is a straight opposed edge of the V-shaped base end of the two semicircular flat blades. The two semi-annular flat blades are V-shaped when viewed from the side, with a V-shaped space formed in the vertical and horizontal directions between the leading edge edges, which are opposite edges of the V-shaped open portion of the semi-annular flat blade. It is characterized by having a tip wing assembled and constructed.

  In addition, the spiral groove for screwing the tip wing configured in an X shape in a side view is constituted by two spiral grooves for the two semicircular flat blades to be screwed and advanced. The screw start end opening is opened at a position opposite to each other, and the opposing edge portions of the two X-shaped semi-circular flat blades enter from the opposite screw start end ports so that the first semi-circular flat blade As the second semicircular flat blade intrudes into the other spiral groove loop, the second semicircular flat blade enters the other spiral groove loop, and the first semicircular flat blade When the second semicircular flat blade enters and advances into the other spiral groove loop, the first semicircular flat blade sequentially advances into the other spiral groove loop. Advances the spiral groove loop, the second semicircular flat blade advances the other spiral groove loop and finally digs into the soil through the spiral groove of the jack liner Characterized by being configured to.

Further, the spiral groove for screwing the tip wing configured in a V shape in a side view is constituted by a single spiral groove for the two semi-annular flat blades to be screwed and advanced, The screw start end opening is one on the surface of the jack liner, and the interval between the upper and lower spaces formed between the opposing edges of the semi-annular flat blades in the V-shaped opening is substantially the same as the pitch interval of the spiral groove loops, When one of the two semi-annular flat blades that are opposed to each other while holding the space enters from the screwing start end, the other semi-annular flat blade is also delayed and advances from the spiral groove, The butt portion between the edges of the V-shaped base end portion is delayed while being advanced into the spiral groove loop at the opposite edge of the V-shaped opening, and finally the jack is advanced into the jack. It is characterized by being configured to penetrate through the spiral groove of the liner and into the soil.

  Between the penetration hole formed for the steel pipe pile insertion in the center of the jack liner and the steel pipe pile, the wedge body can be fitted freely so that it can be tightly tightened according to the diameter of the steel pipe pile. It is characterized by that.

  According to the first aspect of the present invention, the tightening / relaxation actuating portion provided on the all-round rotating jack and performing the tightening / relaxing operation of the steel pipe pile, and the two semicircular blades are inclined in an X shape or a V shape to form a butt shape A steel pipe pile with a tip wing interposed between a steel pipe pile having a tip wing and a jack liner inserted into the soil. The jack liner is divided into a plurality of divided pieces and can be tightened and loosened with respect to the steel pipe pile. In addition, an insertion hole for a steel pipe pile is provided at the center, and two semicircular flats are combined in an X shape or a V shape with opposing edges abutting each other on the inner peripheral surface of the insertion hole. A spiral groove into which each of the blades is screwed is engraved, and a screw start end of the spiral groove is provided on the surface of the jack liner so as to face the rotational direction of two X-shaped or V-shaped semi-flat blades. As a result, two flat semi-circular blades combined in an X or V shape are screwed. It can enter from the threading start end of the groove groove, proceed as it is in the spiral groove, take out the jack liner, tighten the steel pipe pile peripheral surface with the tightening / relaxation operation part via the jack liner, and rotate by the steel pipe pile In particular, once the jack liner is attached to the tightening / loosening actuating part of the all-round rotating jack, the tip blade is directly screwed through the insertion hole during excavation work. This eliminates the need for disassembling and removing heavy jack liners every time a steel pipe pile is set as in the prior art, and avoids the risk of work-related accidents when handling jack liners. There is an effect.

  According to the second aspect of the present invention, the tip wing having two semicircular blades that are reversely inclined in the X shape and configured to face each other at the opposite edge is formed as two semicircular flat blades that are linearly opposed. By making the tip wings configured to face each other and incline to form an X shape in a side view, the tip wing inclined and configured to form an X shape smoothly enters from the screw start end of the spiral groove. In particular, since two screw start ends are formed on the surface of the jack liner, there is an effect that the opposing edge portions of the two X-shaped semicircular blades can be smoothly screwed into the two spiral grooves. is there.

According to the invention of claim 3, the tip wing formed by reversely inclining the two semicircular blades in a V shape and having the opposing edges abutted together is a V-shaped base end portion of the two semiannular flat blades. Two semi-annular flat edges are opposed to each other by forming a V-shaped space in the vertical and horizontal directions between the tip edge blades as opposed edges of the V-shaped opening in the semi-annular flat blade. By making the flat blade into a tip wing assembled in a V shape in side view, one opposing edge of two flat semi-annular flat blades located in the V-shaped space is formed by a spiral groove formed in the jack liner. It can enter from a screwing start end and can advance a spiral groove.
Accordingly, the edge of the abutting portion at the V-shaped base end of the two flat semi-annular flat blades also follows the opposite edge and enters from the screw start end of the spiral groove and advances through the spiral groove. When it comes out of the jack liner, the steel pipe pile is fastened through the jack liner by the tightening / relaxation operation part, and the rotary excavation work can be performed. Therefore, the jack liner mounting / disassembling work is not required every excavation work, so that the work efficiency can be remarkably improved, and the danger associated with the heavy jack liner mounting / disassembling work can be avoided.

  According to invention of Claim 4, the spiral groove for screwing the front-end | tip wing comprised in X shape by the side view has two semi-circular flat blades each screwing and advancing Constructed by a spiral groove, the screwing start end opening is opened at a position facing each other, and each facing edge of the two X-shaped semicircular flat blades enters from the facing screwing start end opening, While the semicircular flat blade of the eye penetrates into one spiral groove loop and advances, the second semicircular flat blade penetrates into the other spiral groove loop. When the semicircular flat blade penetrates into one spiral groove loop and advances, the second semicircular flat blade penetrates into the other spiral groove loop and advances, and in sequence the first half groove The circular flat blade advances in one spiral groove loop, and the second semicircular flat blade advances in the other spiral groove loop, finally the jack liner spiral. The tip wing made of an X-shaped combination of two semi-circular blades, which was previously considered to be unable to be screwed into the spiral groove of the jack liner, has already been installed. There is an effect that it is possible to smoothly screw into the two spiral grooves from the insertion hole of the jack liner and to improve the working efficiency and the excavation efficiency without particularly requiring the disassembling and assembling work of the jack liner.

According to invention of Claim 5, the spiral groove for screwing the front-end | tip wing | blade comprised in the side view V shape is one spiral for two semi-annular flat blades to each screw and advance. It is constituted by a groove, and one screw start opening is opened on the surface of the jack liner, and the space between the upper and lower spaces formed between the opposing edges of the semi-annular flat blades in the V-shaped open part is the spiral groove loop. When one of the two semi-annular flat blades, which is substantially the same as the pitch interval and is opposed to each other while holding the space, enters from the screw start end port, the other semi-annular flat blade is also delayed and the spiral strip The abutting portion between the edges of the V-shaped base end is delayed and screwed into the spiral groove while entering the spiral groove loop at the opposite edge of the V-shaped opening. It was configured to progress and eventually penetrate the spiral groove of the jack liner into the soil. Thus, the tip wing made of a V-shaped combination of two semi-annular flat blades that could not be screwed into the spiral groove of the jack liner can be screwed into the insertion hole of the jack liner smoothly. Therefore, since there is no need to disassemble and assemble the jack liner, there is an effect that the excavation work efficiency can be remarkably improved.

  According to the invention of claim 6, between the insertion hole formed for inserting the steel pipe pile in the center of the jack liner and the steel pipe pile, the tight tightening can be performed according to the diameter of the steel pipe pile. Since the wedge body can be inserted freely, the jack liner can be used in common through the wedge body that can be inserted even if the diameters of the steel pipe piles are different, which has an advantageous effect in terms of work efficiency and cost. is there.

Overall side view of a steel pipe pile with a tip wing of the present invention in the soil Plan view of jack liner provided in the device of the present invention Side view of a steel pipe pile having a tip wing used in the apparatus of the present invention Plan view of a steel pipe pile having a tip wing used in the apparatus of the present invention Sectional explanatory drawing of the II line in FIG. Side view of a steel pipe pile having a tip wing of another embodiment The top view of the steel pipe pile which has a tip wing of other examples Sectional explanatory drawing of the II-II line in FIG. The perspective view of the state before screwing a front wing | blade into the jack liner used for this invention apparatus The perspective view of the state before screwing the tip wing | blade of another Example into a jack liner Explanatory drawing showing the screwed state of the tip wing Cross section of spiral groove of jack liner Explanatory drawing which shows the cross-sectional schematic diagram of a spiral groove, and the screwing state of the tip wing | blade of another Example. Cross section of other jack liner spiral groove Top view of the wedge Perspective view of wedge body used for jack liner Plan view showing the usage state of the wedge body

  The present invention has a tightening / relaxation operating portion that is provided on an all-round rotating jack and performs a tightening / relaxing operation of a steel pipe pile, and a tip wing that is configured by abutting two semicircular blades in an X shape or a V shape in a butting manner. A steel pipe pile with a tip wing provided with a jack liner between the steel pipe piles, and the jack liner is divided into a plurality of pieces and can be tightened and loosened with respect to the steel pipe pile. An insertion hole for a steel pipe pile is provided, and each of the two semicircular blades combined in an X shape or a V shape with the opposite edges abutting each other on the inner peripheral surface of the insertion hole is screwed. A spiral groove to be inserted is engraved, and a screw start end of the spiral groove is provided on the surface of the jack liner so as to face the rotational direction of two X-shaped or V-shaped semicircular blades. Provide an underground penetration device for steel pipe pile with tip wing.

  In addition, the tip wings that have two semicircular blades reversely inclined in an X shape and the opposite edges are configured to abut each other are formed as two semicircular flat blades, but the straight opposed edges are abutted to each other. It was set as the tip wing | blade which was made to incline and was comprised in side view X shape.

  Further, the tip wing constructed by reversely inclining the two semicircular blades in a V shape and having the opposed edges abutted to each other is a straight opposed edge of the V-shaped base end of the two semicircular flat blades. The two semi-annular flat blades are V-shaped when viewed from the side, with a V-shaped space formed in the vertical and horizontal directions between the leading edge edges, which are opposite edges of the V-shaped open portion of the semi-annular flat blade. The tip wing was assembled and constructed.

  In addition, the spiral groove for screwing the tip wing configured in an X shape in a side view is constituted by two spiral grooves for the two semicircular flat blades to be screwed and advanced. The screw start end opening is opened at a position opposite to each other, and the opposing edge portions of the two X-shaped semi-circular flat blades enter from the opposite screw start end ports so that the first semi-circular flat blade As the second semicircular flat blade intrudes into the other spiral groove loop, the second semicircular flat blade enters the other spiral groove loop, and the first semicircular flat blade When the second semicircular flat blade enters and advances into the other spiral groove loop, the first semicircular flat blade sequentially advances into the other spiral groove loop. Advances the spiral groove loop, the second semicircular flat blade advances the other spiral groove loop and finally digs into the soil through the spiral groove of the jack liner It was configured to.

  Further, the spiral groove for screwing the tip wing configured in a V shape in a side view is constituted by a single spiral groove for the two semi-annular flat blades to be screwed and advanced, The screw start end opening is one on the surface of the jack liner, and the interval between the upper and lower spaces formed between the opposing edges of the semi-annular flat blades in the V-shaped opening is substantially the same as the pitch interval of the spiral groove loops, When one of the two semi-annular flat blades that are opposed to each other while holding the space enters from the screwing start end, the other semi-annular flat blade is also delayed and advances from the spiral groove, The butt portion between the edges of the V-shaped base end portion is delayed while being advanced into the spiral groove loop at the opposite edge of the V-shaped opening, and finally the jack is advanced into the jack. It was configured to penetrate through the spiral groove of the liner into the soil.

  In addition, a wedge body can be inserted between the insertion hole formed in the center of the jack liner for insertion of the steel pipe pile and the steel pipe pile so that it can be tightly tightened according to the diameter of the steel pipe pile. It was.

An embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall side view showing a use state of an all-round rotating jack that is an underground penetration device for a steel pipe pile with a tip wing, and an all-round rotating jack K is located at an excavation position, that is, a position where a steel pipe pile P is set. Installed.

  The all-around rotary jack K is provided with a tightening / relaxation operating portion S therein, and is configured so that a steel pipe pile P can be set at the center position (a specific structure is omitted).

  A rectangular or circular jack liner J is disposed inward of the tightening / relaxation operating portion S so as to be freely divided. That is, as shown in FIG. 2, the jack liner J is provided with an insertion hole 10 through which the steel pipe pile P can be inserted at the center, and a plurality of radial holes are formed around the insertion hole 10 in the radial direction. Each of the divided pieces 11 is configured to be freely assembled and disassembled.

The insertion hole 10 of the jack liner J is slightly reduced in diameter from the diameter of the steel pipe pile P at the time of assembly, and each divided piece 11 is slidable outward and inward so that the diameter can be reduced toward the central insertion hole 10. It is configured.
Moreover, when each divided piece 11 slides in the direction of diameter reduction toward the central insertion hole 10, the steel pipe pile peripheral surface 20 (see FIG. 1) of the insertion hole 10 can be tightly tightened, and thereafter It becomes an operation form of the rotary excavation work of the steel pipe pile P.

  As shown in FIGS. 9 and 10, spiral grooves 12, 12 ′, 13 are formed on the inner peripheral surface of the insertion hole 10 of the jack liners J, J ′, and the spiral grooves 12, 12 'and 13 screwing start end ports 14, 14' and 15 are opened.

  The steel pipe pile P inserted through the insertion holes 10 of the jack liners J and J ′ has the tip wings 21 and 31 having two types of structures as shown in FIGS. The foundation pile is constructed by excavating a drilling hole for inserting a steel pipe into the soil by rotating 21 and 31, and specifically has the following shape structure.

  That is, as shown in FIGS. 3 to 5, the structure of one kind of the tip blade 21 is a side surface in which the opposing edge portions 22 a and 22 a of the two semicircular flat blades 22 and 22 are abutted and combined with each other in a reverse inclined shape. It is the tip wing | blade 21 comprised in the view X shape. In addition, the intersecting angle between the two intersecting semicircular flat blades 22 and 22 may be 14.4 degrees or 7.2 degrees. The tip edge of the tip portion of the semicircular flat blades 22 and 22 forms the straight edge blades 22b and 22b. The symbol h1 in FIG. 3 represents an interval in which two flat blades are separated in the side view X shape, and the flat blades are separated from each other.

  As shown in FIGS. 6 to 8, the structure of the other type of tip wing 31 is made by abutting the annular opposing edges 32a and 32a of the two semi-annular flat blades 32 and 32, and the annular tip portion is constant vertically and horizontally. This is a tip wing 31 configured to have a V shape when viewed from the side by combining the flat blades 32, 32 in an inversely inclined manner while holding the above-mentioned space. The tip edge of the annular tip portion of the semi-annular flat blades 32, 32 forms the tip edge blades 32b, 32b. Moreover, the V-shaped intersection angle of the two intersecting semi-annular flat blades 32, 32 is 14.4 degrees.

  The tip wings 21 and 31 of each form composed of the two flat blades 22 and 32 are screwed into the spiral grooves 12, 12 ′ and 13 on the inner peripheral surface of the insertion hole 10 of the jack liners J and J ′. The gist of the present invention lies in the configuration.

That is, as shown in FIGS. 9 and 10, the spiral grooves 12, 12 ′, and 13 engraved on the inner peripheral surface of the insertion hole 10 are two semicircular flat blades combined in an X shape or a V shape. The opposite edge portions 22a and 32a of the butted portions 22 and 32 are configured to be able to advance by screwing, and are formed to be at least wider than the total height, and the screwing start end ports 14, 14 'and 15 are X-shaped or V-shaped. The straight edge blades 22b and 22b and the tip edge blades 32b and 32b are configured to be screwed on the jack liner surface in the rotational direction of the two semicircular flat blades 22 and 22 and the semi-annular flat blades 32 and 32. .
The jack liner is divided into three parts, but the dividing lines are omitted in the jack liners of FIGS.

Specifically, as shown in FIG. 9, the screw start start ports 14 and 15 of the jack liner J with respect to the two semicircular flat blades 22 and 22 configured in an X shape in a side view are opened at positions facing each other. ing. In addition, as shown in FIGS. 9 and 12, the opposing edge portions 22a and 22a of the two X-shaped semicircular flat blades 22 and 22 enter from the opposing screwing start end ports 14 and 15, respectively. The second semicircular flat blade 22 penetrates into the other spiral groove loop R2 while the semicircular flat blade 22 of the eye enters and advances into one spiral groove loop R1. Two spiral grooves 12 and 13 are formed so that the other spiral groove loop R2 is positioned between one spiral groove loop R1. Accordingly, when the first semicircular flat blade 22 enters and advances into one spiral groove loop R1, the second semicircular flat blade 22 enters into the other spiral groove loop R2. The first semicircular flat blade 22 sequentially advances in one spiral groove loop R1, and the second semicircular flat blade 22 advances in the other spiral groove loop R2 in order. Specifically, it was configured to pass through the spiral grooves 12 and 13 of the jack liner J and penetrate into the soil.
The distance between the two spiral grooves 12 and 13 is an X-shaped opening width distance h1 (see FIG. 12), that is, the tips of the two semicircular flat blades 22 and 22 abutted in an X shape. Is substantially the same as the interval h1 (see FIG. 3).

  As shown in FIGS. 10 and 14, the spiral groove 12 ′ for screwing the tip wing 31 configured in a V shape in a side view is screwed into two semi-annular flat blades 32 and 32, respectively. Are formed by a single spiral groove 12 ′, and one screw start end port 14 ′ is opened on the surface of the jack liner J ′, and is opposed to the semi-annular flat blades 32, 32 at the V-shaped opening. The space h2 between the upper and lower spaces formed between the edges 32a and 32a is substantially the same as the pitch interval h2 of the loops of the spiral groove, and the two semicircular flat blades 32 and 32 that are opposed to each other while holding the space. When one of the semi-annular flat blades 32 enters from the screwing start end port 14 ', the other semi-annular flat blade 32 also enters and advances from the spiral groove 12' with a delay, and the opposite edge 32a of the V-shaped opening portion, The end of the V-shaped proximal end while proceeding into the spiral groove loop R1 ′ of 32a Butt portion between the 'advanced screwing medium, eventually jack liner J' helical groove 12 with a delay and arranged to penetrate the soil exits the spiral groove 12 'of.

  Moreover, as shown in FIGS. 15-17, between the penetration hole 10 and the steel pipe pile P which were formed in the center of the jack liners J and J 'for the steel pipe pile insertion, the diameter of the steel pipe pile P is set. The wedge body can be inserted freely so that it can be closely attached and tightened accordingly. That is, in the case where the diameter of the steel pipe pile P does not correspond to the insertion hole 10 by preparing in advance a wedge body 40 having a thin taper shape on the lower side with a semicircular arc-shaped plate body, A plurality of wedge bodies 40 are inserted into a ring shape. In the figure, reference numeral 41 denotes a wedge divided piece obtained by dividing the wedge body 40.

  As shown in FIG. 1, a tightening / relaxation operating portion S is provided around a jack liner provided in the all-round rotating jack, and the jack liners J and J ′ are The contraction stress is transmitted to the peripheral wall, and the steel pipe pile P circumferential surface 20 loosely fitted in the insertion hole 10 is brought into close contact and tightened. After that, when the tightening / relaxation operation part S is rotated and lowered, the driving stress is transmitted to the steel pipe pile P through the jack liners J and J ′, and the tip wings 21 and 31 excavate the soil to construct the foundation pile in the excavation hole. Is done. Reference numeral S1 in FIG. 1 is a tightening / relaxation part for tightening / relaxing the jack liner, and this tightening / relaxation part S1 is constituted by, for example, a hydraulic cylinder.

  Therefore, conventionally, it has been impossible for a tip wing made of a flat blade of X shape or V shape to be screwed into the spiral groove of the jack liner. In the present invention, the tip wing made of a flat blade having an X shape or a V shape has no problem as in the case of the tip wing made of a conventional spiral blade. Can be smoothly screwed in.

  As mentioned above, although embodiment of this invention was described, the said embodiment showed one of the application examples of this invention, and in the meaning which limits the technical scope of this invention to the specific structure of the said embodiment. Absent. Various modifications can be made without departing from the scope of the present invention.

K All-round rotating jack S Tightening / relaxation operating part P Steel pipe pile J, J 'Jack liner 10 Insertion hole 11 Split pieces 12, 12', 13 Spiral groove 21, 31 Tip wing 22 Semi-circular flat blade 22b Linear edge Blade 32 Semi-annular flat blade 32b Tip edge blade

This invention includes a tightening relaxation actuating unit for the clamping relaxation operation of the steel pipe pile is provided on the entire circumference rotary jack, a steel pipe pile having a tip blade configured to form abutting inclined the two semicircular flat blade in the X-shaped A steel pipe pile with a tip wing with a jack liner interposed between them, and the jack liner is divided into a plurality of divided pieces and can be tightened and loosened with respect to the steel pipe pile. In addition, the inner circumferential surface of the insertion hole is provided with a spiral groove into which each of the two semicircular blades that are combined in an X shape with their opposing edges abutting each other is screwed. Engraved, the screw start end of the spiral groove is provided on the surface of the jack liner facing the rotational direction of the two X- shaped semi-flat blades ,
Two semicircular flat blades and straight wings facing each other and inclined to form a tip wing configured in an X shape in a side view,
The spiral groove for screwing the tip wing configured in an X shape when viewed from the side is constituted by two spiral grooves for the two semicircular blades to be screwed and advanced. The starting end opening is opened at a position facing each other, and the opposing edge portions of the two X-shaped semi-flat blades enter from the opposing screwing starting end port so that the first semi-flat blade is one of the spiral strips. While entering the groove loop, the second semicircular blade enters the other spiral groove loop, and the first semicircular blade enters one spiral groove loop. As it invades and advances, the second semicircular blade enters and advances into the other spiral groove loop, and the first semicircular blade sequentially advances through one spiral groove loop. previous sheet is semicircular flat blade, characterized by being configured so as to excavate the soil and eventually exits the spiral groove of the jack liner proceeds the other helical groove loop To provide a soil penetration apparatus of winged steel pipe piles.

The intersecting angle of the two intersecting semicircular flat blades is 14.4 degrees or 7.2 degrees .

Also, there is a tightening / relaxation actuating part provided on the all-round rotating jack for tightening / loosening the steel pipe pile, and a steel pipe pile having two wings inclined in a V shape and having a tip wing configured to butt. A steel pipe pile with a tip wing inserted in the soil in the soil, and the jack liner is divided into a plurality of divided pieces and can be tightened and loosened with respect to the steel pipe pile. An insertion hole is provided, and on the inner peripheral surface of the insertion hole, a spiral groove into which each of two semi-annular flat blades combined in a V shape with their opposite edges abutting each other is engraved. The screw start end of the spiral groove is provided on the surface of the jack liner facing the rotational direction of the two V-shaped semi-annular flat blades,
The V-shaped base edges of the two semi-annular flat blades are opposed to each other in a straight line, and the V-shaped vertical edges of the V-shaped open portions of the semi-annular flat blades are vertically V. A tip wing formed by assembling and configuring two semi-annular flat blades in a V shape when viewed from the side .
The intersecting angle of the V shape of two intersecting semi-annular flat blades is 14.4 degrees,
The spiral groove for screwing the tip wing configured in a V shape when viewed from the side is constituted by a single spiral groove for the two semi-annular flat blades to be screwed and advanced. One opening is opened on the surface of the jack liner, and the space between the upper and lower spaces formed between the opposing edges of the semi-annular flat blades in the V-shaped open portion is substantially the same as the pitch interval of the spiral groove loop. When one of the two semi-annular flat blades held and faced enters from the screwing start end, the other semi-annular flat blade also enters behind the spiral groove with a delay, and V The abutting portion between the edges of the V-shaped base end portion is delayed and advanced into the spiral groove while finally entering into the spiral groove loop at the opposite edge of the opening, and finally the jack liner It is characterized by being configured to penetrate through the spiral groove into the soil .

According to the invention of claim 1 or 3, the tightening / relaxation actuating portion provided on the all-round rotating jack for performing the tightening / relaxing operation of the steel pipe pile, and the two semicircular blades are X-shaped or two semiannular flat blades. A steel pipe pile with a tip wing interposed between a steel pipe pile having a tip wing that is inclined in a V shape and a butted shape, and the jack liner is divided into a plurality of divided pieces. The steel pipe pile is constructed so that it can be tightened and loosened, and an insertion hole for the steel pipe pile is provided in the center, and the inner peripheral surface of the insertion hole is opposed to each other and combined in an X shape. A spiral groove into which each of the two semicircular flat blades or two semicircular flat blades combined in a V shape is screwed is engraved, and the screw start end of the spiral groove is two X- shaped. semicircular flat blade or V-shaped two semi-annular flat blade jack liner surface opposite the direction of rotation of the By providing, that the semi-annular flat blade of a flat two combined flat two semicircular flat blade or V-shaped combined in X shape entering from screwing start port of the spiral groove It is possible to proceed with the spiral groove as it is, take out the jack liner, tighten the steel pipe pile peripheral surface with the tightening / relaxation operation part via the jack liner, and perform rotary excavation work with the steel pipe pile, especially the jack liner Once attached to the tightening / relaxation operating part of the all-round rotating jack, the tip wing can be screwed directly into the insertion hole during excavation work and can be removed after excavation. There is an effect that it is not necessary to disassemble and remove and assemble a heavy-weight jack liner every time when the jack is set, and it is possible to avoid a work accident risk when processing the jack liner.

Further, according to the invention of claim 1, by which the tip blade constructed two of each is inclined against the opposite edge portions straight as half Entaira blade side view X-shaped, the X-shaped Inclined butted tip wings can smoothly enter from the screw start end of the spiral groove, and in particular, since two screw start ends are formed on the jack liner surface, There is an effect that the opposite edge portions of the two X-shaped semicircular flat blades can smoothly be screwed.
Furthermore, the spiral groove for screwing the tip wing configured in the X shape in the side view is constituted by two spiral grooves for the two semicircular blades to screw and advance, The screw start end opening is opened at a position opposite to each other, and the opposing edge portions of the two X-shaped semicircular blades invade from the opposite screw start end ports so that the first semicircular flat blade is on one side. The second semicircular blade invades into the other spiral groove loop while entering the other spiral groove loop, and the first semicircular blade is in one spiral groove As it penetrates into the loop and advances, the second semicircular blade enters and advances into the other spiral groove loop, and the first semicircular blade sequentially advances through one spiral groove loop. The second semi-circular blade is configured to advance through the other spiral groove loop and finally excavate through the spiral groove of the jack liner. Two spiral grooves from the insertion hole of the jack liner already fitted with a tip wing made of an X-shaped combination of two semi-circular blades, which was previously considered impossible to screw into the spiral groove of the jack liner Therefore, there is an effect that the working efficiency and the excavation efficiency can be improved without particularly requiring the disassembly and assembly work of the jack liner.

According to the invention of claim 3, the straight opposing edges of the V-shaped base end portions of the two semi-annular flat blades are abutted with each other, and the leading edge which is the opposing edge of the V-shaped open portion of the semi-annular flat blades and tip blades and assembled configuration the two semi-annular flat blade is opposed to form a V-shaped space in a side view V-shaped in vertical and horizontal directions between the blades to each other, V the flat blade of two semi-annular crossed Since the crossing angle of the shape is 14.4 degrees, one opposing edge of the two flat semi-annular flat blades located in the V-shaped space starts to be screwed into the spiral groove formed on the jack liner. It can enter from the end and advance through the spiral groove.
Accordingly, the edge of the abutting portion at the V-shaped base end of the two flat semi-annular flat blades also follows the opposite edge and enters from the screw start end of the spiral groove and advances through the spiral groove. When it comes out of the jack liner, the steel pipe pile is fastened through the jack liner by the tightening / relaxation operation part, and the rotary excavation work can be performed. Therefore, the jack liner mounting / disassembling work is not required every excavation work, so that the work efficiency can be remarkably improved, and the danger associated with the heavy jack liner mounting / disassembling work can be avoided.

Further, according to the invention of claim 3, spiral grooves for screwing the tip blade is constructed to a side view V shape, one for the semi-annular flat blade of two travels screwed respectively The screw start end opening is one on the surface of the jack liner, and the space between the upper and lower spaces formed between the opposing edges of the semi-annular flat blades in the V-shaped open portion is the width of the spiral groove. When one of the two semi-annular flat blades, which is substantially the same as the pitch interval of the loop and is opposed to each other while holding the space, enters from the screwing start end, the other semi-annular flat blade is also delayed. The abutting part between the edges of the V-shaped base end is delayed while it advances into the spiral groove loop at the opposite edge of the V-shaped opening, and the abutting part between the edges of the V-shaped base end is delayed. It is constructed so that it can be screwed in and finally penetrate the spiral groove of the jack liner into the soil. Thus, it is possible to smoothly screw the tip wings made of a V-shaped combination of two semi-annular flat blades, which were conventionally considered not to be screwed into the spiral groove of the jack liner, into the insertion holes of the jack liner, respectively. Therefore, since there is no need to disassemble and assemble the jack liner, there is an effect that the excavation work efficiency can be remarkably improved.

According to the invention of claim 4 , between the insertion hole formed for the steel pipe pile insertion in the center of the jack liner and the steel pipe pile, it is possible to tightly tighten and tighten according to the diameter of the steel pipe pile. Since the wedge body can be inserted freely, the jack liner can be used in common through the wedge body that can be inserted even if the diameters of the steel pipe piles are different, which has an advantageous effect in terms of work efficiency and cost. is there.

Further, the helical grooves for screwing the tip blade is constructed to a side view X shape, constituted by two spiral grooves for two semi Entaira blade travels screwed respectively, screwing start port is open in a position facing each other, half Entaira blade first sheet each opposite edge portions from entering the two semi Entaira blade X-shaped from the opposite screwing start port of one semi Entaira blade handsome while traveling from entering a spiral groove loops continue to penetrate into the other helical groove loop, semi Entaira blade first sheet is one of the spiral grooves loop When invades proceeds in semi Entaira blade handsome proceeds invade in the other spiral grooves loop, semi Entaira blades sequentially first sheet proceeds one spiral groove loop semi Entaira blade handsome is configured to excavate the soil exits the spiral groove of the other spiral groove loop eventually jack liner to proceed.

That is, the structure of one type of tip blade 21, as shown in FIGS. 3 to 5, a side view in combination with reverse inclined respectively against the opposite edge portions 22a, 22a of the two half-Entaira blades 22, 22 This is a tip wing 21 configured in an X shape. Moreover, the crossing angle of the crossed two semi Entaira blades 22 and 22 there is a case where the 7.2 degrees 14.4 degrees. Incidentally, the tip end of the tip portion of the semi Entaira blades 22, 22 are formed linearly Enha 22b, the 22b. Code h1 in Figure 3 by combining two semi Entaira blade side view X-shaped, the flat blade to each other is a representation of the most distant spacing.

That is, as shown in FIGS. 9 and 10, the spiral grooves 12, 12 ′, and 13 engraved on the inner peripheral surface of the insertion hole 10 are two semicircular flat blades combined in an X shape or a V shape. 22 and the opposite edge portions 22a and 32a of the abutting portions of the two semi-annular flat blades 32 are formed so as to be able to advance by screwing, and are formed to be at least wider than the total height, and are screwed start end ports 14, 14 ', 15 threadedly X-shaped or V-shaped two linear end Enha 22b in the rotation direction of the half Entaira blades 22, 22 and semi-circular flat blades 32, 32, 22b and tip Enha 32 b, 32 b are in jack liner surface It was constructed in a position where it could enter.
The jack liner is divided into three parts, but the dividing lines are omitted in the jack liners of FIGS.

Specifically, as shown in FIG. 9, and opens to the position jack liner J of screwing start port 14, 15 for the two half-Entaira blades 22, 22 configured in side view X shape facing each other Yes. Moreover, FIG. 9, as shown in FIG. 12, the opposite edge portions 22a of the X-shaped two semi Entaira blades 22, 22 from the screwed start opening 14, 15 facing, first sheet 22a invades as the half Entaira blade 22 can be one of the helical strip half Entaira blade 22 of handsome while traveling from entering a groove loop R1 is gradually penetrates into the other helical groove loop R2 Two spiral grooves 12 and 13 are formed in the first spiral groove loop R1 so that the other spiral groove loop R2 is positioned between the first spiral groove loop R1. Therefore, when the first sheet of semi Entaira blade 22 progresses from entering a one of the spiral grooves loop R1, progression semi Entaira blade 22 of handsome intrudes in the other spiral groove loop R2 and sequentially first sheet of semi Entaira blade 22 travels through one of the helical grooves loop R1, handsome semi Entaira blade 22 proceeds to eventually jack liner the other helical groove loop R2 It was configured to pass through the spiral grooves 12 and 13 of J and penetrate into the soil.
Further, (see Figure 12) distance h1 mutual spacing X-shaped opening width of two spiral grooves 12 and 13, i.e., the two butt to X-shaped semi Entaira blades 22, 22 the tip of the It is substantially the same as the interval h1 (see FIG. 3).

K entire circumference rotating jack S tightening loosening operation unit P steel pipe pile J, J 'jack liner 10挿貫hole 11 divided pieces 12, 12', 13 helical grooves 21 and 31 the tip blade 22 semi Entaira blade 22b straight end Enha 32 Semi-annular flat blade 32b Tip edge blade

Claims (6)

A tightening / relaxation actuating part provided on an all-round rotating jack for tightening / loosening the steel pipe pile, and a steel pipe pile having a tip wing constructed by inclining two semicircular blades in an X shape or a V shape in a butted shape A steel pipe pile with a tip wing with a jack liner in between. The jack liner is divided into a plurality of pieces and can be tightened and loosened with respect to the steel pipe pile. And the inner peripheral surface of the insertion hole is opposed to the opposite edge portions of each other, and each of the two semicircular blades combined in an X shape or a V shape is screwed into the spiral strip. A steel pipe with a tip wing characterized in that a groove is engraved and the screw start end of the spiral groove is provided on the surface of the jack liner facing the rotation direction of two X-shaped or V-shaped semicircular blades. Pile penetration device. The tip wings are constructed with two semicircular flat blades reversely inclined in the X shape and the opposing edges are butted together, and the two semicircular flat blades are brought into contact with each other and tilted each other. The steel pier pile with a tip wing according to claim 1, wherein the tip wing is configured in an X shape in a side view. The tip wing constructed by reversely inclining the two semicircular flat blades in a V shape and having the opposing edges abutted to each other forms the straight opposing edges of the V-shaped base end portions of the two semicircular flat blades. The two semi-annular flat blades are assembled in a V shape when viewed from the side by making a V-shaped space in the vertical and horizontal directions between the tip edge blades that are opposed to each other and facing each other. It is set as the comprised tip wing. The steel pipe pile with a tip wing | blade of Claim 1 or 2 characterized by the above-mentioned. The spiral groove for screwing the tip wing configured in an X shape when viewed from the side is constituted by two spiral grooves for the two semicircular flat blades to be screwed and advanced. The entrance end opening opens to a position opposite to each other, and the opposing edges of the two X-shaped semicircular flat blades invade from the opposing screw start end ports so that the first semicircular flat blade is on one side. The second semi-circular flat blade enters the other spiral groove loop while the first semi-circular flat blade enters one of the spirals. When entering and entering the groove loop, the second semicircular flat blade enters and advances into the other spiral groove loop, and the first semicircular flat blade sequentially moves into one spiral line. Proceeding the groove loop, the second semicircular flat blade advances the other spiral groove loop and finally passes through the spiral groove of the jack liner to excavate in the soil Soil penetrating device tip winged steel pipe pile according to any one of claims 1 to 3, characterized in that the sea urchin configuration. The spiral groove for screwing the tip wing configured in a V shape when viewed from the side is constituted by a single spiral groove for the two semi-annular flat blades to be screwed and advanced. One opening is opened on the surface of the jack liner, and the space between the upper and lower spaces formed between the opposing edges of the semi-annular flat blades in the V-shaped open portion is substantially the same as the pitch interval of the spiral groove loop. When one of the two semi-annular flat blades held and faced enters from the screwing start end, the other semi-annular flat blade also enters behind the spiral groove with a delay, and V The abutting portion between the edges of the V-shaped base end portion is delayed and advanced into the spiral groove while finally entering into the spiral groove loop at the opposite edge of the opening, and finally the jack liner 5. It is configured to pass through the spiral groove and penetrate into the soil. The underground penetration | invasion apparatus of the steel pipe pile with a tip wing | blade of any one of these. Between the penetration hole formed for the steel pipe pile insertion in the center of the jack liner and the steel pipe pile, the wedge body can be fitted freely so that it can be tightly tightened according to the diameter of the steel pipe pile. A steel pipe pile with a tip wing according to any one of claims 1 to 5, wherein the steel pipe pile has a penetration into the soil.

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