JP5490452B2 - Anti-blur guide device for taper pile driving - Google Patents

Description

The present invention relates to an anti-blur guide device at the time of placing a tapered pile.

  For example, as a reinforcement measure for the foundation ground when building a building such as a residential building on soft ground, foundation piles such as steel pipe piles are installed in the ground by press-fitting or rotary press-fitting using heavy press machines, It is possible to prevent uneven settlement (unequal settlement) or increase the supporting force of the foundation ground (for example, see Patent Document 1). In these methods, since it is necessary to drive the foundation pile vertically toward the support layer, the leader part of the press-fitting heavy machine that slides the press-fitting device up and down is built vertically, and the lower end of the leader part A device has been devised that guides the foundation pile into the ground while preventing the blur at the center position by providing a guide device for preventing vibration at the part.

  On the other hand, a so-called taper pile having a tapered portion whose outer diameter is reduced from one end side toward the other end side is press-fitted using a press-fitting heavy machine with the other end portion having a smaller outer diameter directed downward. When installed in the ground by rotary press-fitting, it is known that the foundation ground can be effectively reinforced without the need to drive the taper pile to the support layer due to the wedge effect of such a taper pile and the large peripheral frictional force. (For example, refer to Patent Document 2).

JP 2004-190382 A JP 2008-190116 A

  Also in the case of tapered piles, in order to maximize the reinforcement function of the foundation ground, it is necessary to press fit or rotate in the vertical direction with the other end with a small outer diameter facing downward, Therefore, it is desirable to provide the anti-shake guide device at the lower end of the leader portion of the press-fitting heavy machine to guide the taper pile, but the conventional anti-shake guide device causes problems.

  That is, in the conventional anti-blur guide device, a straight pipe foundation pile whose outer diameter does not change from one end side toward the other end side is guided, and the hollow interior of the annular guide part through which the foundation pile is inserted By fixing the inner diameter of the base pile to an inner diameter that is approximately equal to the outer diameter of the foundation pile, it is possible to guide the foundation pile while performing anti-bluring in a stable state from the beginning of the foundation pile driving to the final stage of driving. However, in the case of a tapered pile whose outer diameter is reduced from one end side toward the other end side, for example, if it is fixed to the inner diameter matched to the lower end portion having a smaller outer diameter, the upper part Can not be inserted into the hollow inside of the annular guide part, for example, if it is fixed to the inner diameter matched to the upper end part having a large outer diameter, the inner peripheral surface inside the hollow part of the annular guide part particularly around the lower end part A large gap between the Shake is likely to occur at the start of driving of the par pile.

The present invention has been made paying attention to such a conventional problem, and when driving a taper pile into the ground by press-fitting or rotary press-fitting using a press-fitting heavy machine, the last stage of driving from the start of driving. An object of the present invention is to provide an anti-blurring guide device at the time of placing a tapered pile that can guide the tapered pile while performing anti-bluring in a stable state.

The present invention is a method of press-fitting a taper pile having a tapered portion whose outer diameter is reduced from one end side toward the other end side, using a press-fitting heavy machine with the other end portion having a smaller outer diameter directed downward. or for installation in an underground by rotating press-attached to the lower end portion of the leader portion of the press-fitting heavy machinery to guide the tapered pile is driven vertically, the blur prevention guides method of tapered Kuida設時 a shake stop guide device used, the shake stop guide device includes an annular guide portion having a hollow interior capable of inserting the tapered pile, directed radially inward from at least three locations of the inner peripheral surface of the annular guide portion And at least three radial restricting members that protrude so as to advance and retreat, and as the tapered pile is pressed or rotationally pressed downward, the at least three radial restricting portions. Of the radial direction regulating member so that a virtual inscribed circle that is in contact with the distal end of the radial direction draws a circle having a diameter slightly larger than the outer diameter of the tapering pile that expands in the portion inserted through the annular guide portion. The taper which controls the amount of advance and retreat, and the surface facing the outer peripheral surface of the taper pile penetrated by the annular guide part of the radial direction regulation member inclines at an angle along the inclination of the taper pile The above object is achieved by providing an anti-blur guide device for pile driving .

And in the anti-blur guide device at the time of taper pile driving of the present invention, the advancement / retraction amount of the radial direction regulating member is based on the calculated value according to the inclination angle of the tapered surface of the taper pile and the driving speed of the taper pile. It is preferable to be automatically controlled.

  In the anti-blur guide device of the present invention, it is preferable that the radial direction regulating member is advanced and retracted radially inward by the action of hydraulic pressure.

According to the anti-blur guide device at the time of driving the tapered pile of the present invention, when the tapered pile is driven into the ground by press-fitting or rotational press-fitting using a press-fitting heavy machine, it is stable from the start of driving to the final driving stage. The taper pile can be guided while preventing blurring in the state.

It is explanatory drawing of the condition which press-fits or press-fits a taper pile into the ground using a heavy press machine by the anti-blur guide method and anti-blur guide device which concerns on preferable one Embodiment of this invention. FIG. 5 is a schematic perspective view illustrating a situation in which a tapered pile is guided by the anti-blur guide method and the anti-blur guide device according to the preferred embodiment of the present invention. FIG. 6 is a schematic perspective cross-sectional view for explaining a situation at the start of driving in which a tapered pile is guided by the anti-blur guide method and the anti-blur guide device according to the preferred embodiment of the present invention. FIG. 6 is a schematic perspective cross-sectional view for explaining a situation of a final driving stage in which a tapered pile is guided by the anti-blur guide method and the anti-blur guide device according to a preferred embodiment of the present invention. It is a general | schematic see-through | perspective plane sectional view explaining the condition which removes an anti-bluring guide apparatus from the driven-in taper pile. It is a fragmentary perspective view which illustrates the form of the control part of a radial direction control member.

As shown in FIG. 1, the anti-blur guide device at the time of driving a tapered pile according to a preferred embodiment of the present invention has a tapered portion whose outer diameter is reduced from the one end portion 11 a side toward the other end portion 11 b side. When the taper pile 12 having the outer diameter 11 is installed in the ground by press-fitting or rotary press-fitting using the press-fitting heavy machine 13 with the other end portion 11b having a small outer diameter facing downward, the center position of the taper pile 12 This is employed in order to effectively suppress the occurrence of blurring, which is a phenomenon that shifts from side to side, so that the tapered pile 12 can be driven in a stable state in the vertical direction.

That is, the anti- blur guide device 10 at the time of driving the tapered pile according to the present embodiment removes the tapered pile 12 having the tapered portion 11 whose outer diameter is reduced from the one end portion 11a side toward the other end portion 11b side. When installing in the ground by press-fitting or rotating press-fitting with the press-fitting heavy machine 13 with the other end part 11b having a small diameter facing downward, it is attached to the lower end part of the leader part 14 of the press-fitting heavy machine 13 A guide device used in a guide method for preventing vibration at the time of placing a tapered pile, which guides the tapered pile 12 to be driven vertically. As shown in FIG. An annular guide portion 16 having a hollow interior 15 that can be inserted, and advancement and retraction from the at least three locations (three locations in the present embodiment) of the annular guide portion 16 inward in the radial direction. As shown in FIG. 3 and FIG. 4, at least three bodies are configured so as to include at least three radial direction regulating members 17 that come out, and as the tapered pile 12 is press-fitted or rotationally pressed downward. A virtual inscribed circle C in contact with the distal end portion of the radial direction regulating member 17 draws a circle having a diameter slightly larger than the outer diameter of the taper pile 12 that expands in the portion inserted through the annular guide portion 16. In addition, the advancement / retraction amount of the radial direction regulating member 17 is controlled. Moreover, the surface which opposes the outer peripheral surface of the taper pile 12 penetrated by the cyclic | annular guide part 16 of the radial direction control member 17 inclines at the angle along the inclination of the taper pile 12 (refer FIG. 6).

  In this embodiment, the taper pile 12 is a steel pipe pile having a thickness of, for example, about 4.5 mm, which is formed into a cylindrical shape by a known manufacturing method, for example. Further, as shown in FIG. 1, the taper pile 12 has a length of about 500 to 600 cm, for example, and a tapered portion 11 whose outer diameter is reduced from the one end portion 11 a side toward the other end portion 11 b side. And a straight pipe portion 19 having a length of, for example, about 300 to 500 mm to which the press-fitting device 18 of the press-fitting heavy machine 13 is attached and integrated on one end (upper end) 11a side of the tapered portion 11. ing.

  Moreover, in this embodiment, the taper-shaped part 11 of the taper pile 12 joins the straight pipe part 19, and the original diameter part by the side of the one end part 11a which has the same outer diameter as the said straight pipe part 19 is the largest outer diameter. The maximum outer diameter of the original diameter portion is, for example, about 120 to 450 mm. The tapered portion 11 of the tapered pile 12 is formed so that the outer peripheral surface thereof is inclined with a gradient of preferably about 1/25 to 1/200 from the one end 10a side to the other end 10b side. Yes.

  Further, in the present embodiment, a tip fitting (not shown) is attached to the other end portion (lower end portion) 10b having a small outer diameter of the tapered portion 11 of the tapered pile 12 so as to close the tip opening. And a cutting blade 20 is attached.

  The press-fitting heavy machine 13 for driving the tapered pile 12 into the ground is a known heavy machine as a heavy machine for placing a steel pipe pile or a PC concrete pile, for example. The press-fitting heavy machine 13 includes a base machine 22 having an operator room 21, a press-fitting device 18 having a rotary drive motor that presses the taper pile 12 into the ground by mounting the straight pipe portion 19 of the taper pile 12, and a press-fitting device 18. A leader unit 14 and the like are provided for guiding the sliding movement in the vertical direction.

  Further, the press-fitting heavy machine 13 is provided with a known construction management control system that manages and controls press-fitting, press-fitting speed, rotational torque, and the like by the press-fitting device 18 in the operator chamber 21, thereby driving the tapered pile 12 into place. Can be automatically controlled.

  In this embodiment, the anti-blur guide device 10 that guides the tapered pile 12 to be driven vertically is attached to the lower end portion of the leader portion 14 of the press-fitting heavy machine 13. As shown in FIGS. 2 to 5, the anti-blur guide device 10 includes an annular guide portion 16 having a hollow interior 15 through which the taper pile 12 can be inserted, and an inner radial surface from three locations on the inner peripheral surface of the annular guide portion 16. It consists of three radial direction regulating members 17 projecting forward and backward. The anti-shake guide device 10 is integrally fixed to the lower end portion of the leader portion 14 via the support arm 23 so that the center of the annular guide portion 16 is disposed vertically below the rotation shaft of the press-fitting device 18. become.

  The annular guide portion 16 constituting the anti-blur guide device 10 includes a semicircular fixed-side arc-shaped portion 24a and an open / close-side arc-shaped portion 24b obtained by dividing a circular ring shape by a dividing line in the radial direction. 24a and the open / close side arcuate portion 24b are connected via a pin coupling portion 25 so as to be opened and closed. As a result, the annular guide portion 16 is in a state in which a hollow interior 15 into which the taper pile 12 can be inserted is formed by closing the open / close side arcuate portion 24b with the opposite side to the pin coupling portion 25 being locked. 4) and a state in which the anti-blur guide device 10 can be removed from the tapered pile 12 by releasing the locked state opposite to the pin coupling portion 25 and opening the open / close side arcuate portion 24b (see FIG. 5). ) And can be switched. In addition, the annular guide portion 16 has two radial restriction members 17 on the fixed-side arcuate portion 24a so as to be arranged at an equiangular pitch of 120 ° with the hollow interior 15 formed. A total of three bodies are attached to 24b.

  In the present embodiment, the radial direction regulating member 17 is preferably a hydraulic jack that advances and retracts inward in the radial direction by the action of hydraulic pressure. The hydraulic jack 17 fixes the cylinder portion 26 to the annular guide portion 16 and expands and contracts the piston portion 27 so that the regulating portion 28 attached to the tip of the piston portion 27 has a diameter in the hollow interior 15 of the annular guide portion 16. It can be moved forward and backward in the direction.

  Moreover, in this embodiment, the front end surface of the control part 28 attached to the front-end | tip of the piston part 27 which is a surface facing the outer peripheral surface of the taper pile 12 penetrated by the cyclic | annular guide part 16 of the hydraulic jack 17 is shown in FIG. It is preferable that the tapered surface 29 be inclined at an angle along the inclination of the tapered pile 12 as shown in FIG. By setting the tip surface of the restricting portion 28 as a tapered surface 29 that is inclined at an angle along the inclination of the tapered pile 12, the surface is subjected to a lateral vibration load from the tapered pile 12 as a surface, thereby preventing blurring in a more stable state. However, it becomes possible to guide the taper pile 12.

  Furthermore, in this embodiment, it is preferable to connect the operation part of the radial direction control member 17 by the hydraulic jack 17 to the construction management control system provided in the operator room 21 of the press-fitting heavy machine 13. Thereby, the amount of advancement / retraction of the restricting portion 28 of the radial restricting member 17 can be reduced, for example, based on the calculated value corresponding to the inclination angle of the tapered surface of the tapered pile 12 and the driving speed of the tapered pile 12. As it is press-fitted or rotationally press-fitted, a virtual inscribed circle C in contact with the distal end surfaces of the restricting portions 28 of the three radial restricting members 17 expands at the portion inserted through the annular guide portion 16. Automatic control can be performed so as to draw a circle having a diameter slightly larger than the outer diameter of the pile 12 (for example, a diameter larger by about 2 to 5 mm) (see FIGS. 3 and 4).

  In the present embodiment, the amount of advancement / retraction of the restriction portion 28 of the radial restriction member 17 is determined by the manual operation of the operator in the operator chamber 21 without automatic control. It is also possible to control so that a virtual inscribed circle C in contact with the distal end surface draws a circle having a diameter slightly larger than the outer diameter of the taper pile 12 that expands in the portion inserted through the annular guide portion 16. is there.

  And according to the anti-blur guide method and the anti-blur guide device 10 of the present embodiment having the above-described configuration, when the tapered pile 12 is driven into the ground by press-fitting or rotary press-fitting using the press-fitting heavy machine 13, It is possible to guide the taper pile 12 while preventing blurring in a stable state from the start of driving to the final stage of driving.

  That is, according to the present embodiment, the anti-blur guide device 10 includes an annular guide portion 16 having a hollow interior 15 into which the tapered pile 12 can be inserted, and an inner circumferential surface of the annular guide portion 16 directed radially inward. And three radial restriction members 17 projecting so as to advance and retreat, and as the taper pile 12 is press-fitted or rotationally pressed downward, the distal ends of the three radial restriction members 17 Of the radial direction restricting member 17 so that the virtual inscribed circle C in contact with the portion draws a circle having a diameter slightly larger than the outer diameter of the taper pile 12 that expands in the portion inserted through the annular guide portion 16. Since the advance / retreat amount is controlled, a large gap is generated between the tip surface of the restricting portion 28 of the radial restricting member 17 and the outer peripheral surface of the tapered pile 12 from the start of driving to the final driving stage. To avoid It is possible to guide the tapered pile 12 while performing blur stopped at a constant state.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the radial direction regulating member does not necessarily need to be a hydraulic jack that moves forward and backward by the action of hydraulic pressure, and may be advanced and retracted by another mechanism. Further, the radial direction regulating member is not limited to three bodies, and four or more radial direction regulating members can be provided in the annular guide portion.

DESCRIPTION OF SYMBOLS 10 Anti-blur guide apparatus 11 Tapered part 11a One end part 11b of a taper-shaped part 12 Other end part 12 of a taper-shaped part Taper pile 13 Press heavy machine 14 Leader part 15 Hollow inside of an annular guide part 16 Annular guide part 17 Radial direction regulation member (Hydraulic jack)
18 Press-fit device 19 Straight pipe portion 21 Operator chamber 25 Pin coupling portion 26 Cylinder portion 27 Piston portion 28 Restriction portion C Virtual inscribed circle in contact with the distal end portion of the radial direction restriction member

Claims (3)

A taper pile having a tapered portion whose outer diameter is reduced from one end side toward the other end side is press-fitted or rotationally pressed using a press-fitting heavy machine with the other end portion having a smaller outer diameter directed downward. When installed in the ground, the anti-blur guide used for the anti-blur guide method when installing the tapered pile, which is attached to the lower end of the leader part of the press-fitting heavy machine and guides the tapered pile to be driven vertically A device ,
The anti-blur guide device has an annular guide portion having a hollow interior through which a taper pile can be inserted, and protrudes from at least three locations on the inner peripheral surface of the annular guide portion so as to advance and retract in the radial direction. It is configured including a body radial direction regulating member,
As the taper pile is press-fitted or rotary-fitted downward, a virtual inscribed circle in contact with the tip portions of the at least three radial restriction members expands at the portion inserted through the annular guide portion. The amount of advancement and retraction of the radial direction regulating member is controlled so as to draw a circle having a diameter slightly larger than the outer diameter of the tapered pile ,
An anti-blur guide device at the time of driving a tapered pile in which a surface facing the outer peripheral surface of the tapered pile inserted through the annular guide portion of the radial direction regulating member is inclined at an angle along the inclination of the tapered pile . The taper pile according to claim 1, wherein the advancement / retraction amount of the radial direction regulating member is automatically controlled based on a calculated value corresponding to an inclination angle of a tapered surface of the taper pile and a driving speed of the taper pile. Anti-blur guide device when placing . The anti-blur guide device for driving a taper pile according to claim 1 or 2 , wherein the radial regulating member advances and retracts radially inward by the action of hydraulic pressure.

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