JP2010043471A - Pile construction apparatus and pile construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pile construction apparatus for laying a pile body to which a pile head connection reinforcement is exposed. <P>SOLUTION: The pile construction apparatus 14 is provided on the upper side of the pile body 11. The pile construction apparatus 14 includes a pile construction tool 16 having a connection reinforcement storage space 15 fitted onto a pile head of the pile body 11 to which the pile head connection reinforcement 13 is exposed, and a lifting operating body 17 performing at least the lifting operation of the pile body 11 through the pile construction tool 16. The pile construction tool 16 includes a plurality of fitting groove parts 23 at the lower part of a tool body 21 formed in cylindrical shape. The fitting groove parts 23 are detachably fittable to a plurality of projecting parts 22 projected to the upper end side face of the pile body 11 according to the rotating direction of the tool body 21. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pile construction device and a pile construction method for laying a pile body in which a pile head coupling bar is exposed.

  As shown in FIG. 8, a pile head coupling bar 3 is embedded in the pile head 2 of the pile body 1, and the pile head coupling bar 3 is at a predetermined level, generally a level lower than the ground level 4. Is laid. Then, after foundation base concrete is constructed, the work which exposes the pile head connecting reinforcement 3 embedded in the pile head 2 of the pile body 1 is performed (for example, refer to cited documents 1 and 2).

  In short, the construction method for laying the pile body 1 with the head joint bars 3 exposed as it is is not in the prior art, and after laying the pile body 1, for example, the concrete of the pile head 2 using a pile cutter The portion is cut so that the pile head connecting muscle 3 is exposed. In steel pipe concrete piles (so-called SC piles), cut-off work is performed in which the steel pipes are cut with an oxygen fusing or a grinder and the pile head connecting bars 3 embedded in the concrete are lifted.

And the foundation part 6 of ground structures 5, such as a bridge pier, is constructed to these pile head connecting muscles 3. FIG.
JP 2002-054136 A (page 2-3, FIG. 1-3) Japanese Patent Laying-Open No. 2005-213963 (page 4-5, FIG. 2-5)

  In this conventional method, it is necessary to make the pile head connecting bar 3 protrude long, and the construction cost and work period required for cutting off the pile head connecting bar 3 are increased. There are also problems such as the generation of things.

  On the other hand, if the pile body with the pile head coupling bar exposed from the pile head is molded, it is not necessary to perform the cut-off work of the pile head as described above, but such a pile head coupling bar is still exposed. A construction method for laying a pile body has not been considered.

  This invention is made | formed in view of such a point, and it aims at providing the pile construction apparatus and the pile construction method for laying the pile body from which the pile head joint reinforcement was exposed.

  The invention described in claim 1 includes a pile construction jig having a coupling bar storage space fitted on a pile head of a pile body in which the pile head coupling bars are exposed, and a pile body via the pile construction jig. It is the pile construction apparatus which comprised the raising / lowering operation body which raises / lowers at least.

  According to a second aspect of the present invention, the pile construction jig in the pile construction apparatus according to the first aspect is provided with a jig body formed in a cylindrical shape, and a rotation of the jig body provided at a lower portion of the jig body. It is provided with a fitting groove part that can be freely inserted into and removed from the protruding part that protrudes from the side of the upper end part of the pile body depending on the direction.

  According to a third aspect of the present invention, the jig body of the pile construction jig in the pile construction device according to the first or second aspect is concentric with the outer cylinder part provided with the fitting groove part and the inner side of the outer cylinder part. An inner cylinder portion having an inner diameter surface continuously provided with an inner diameter surface of a pile body that is provided in a hollow shape, and a screw that is opened at the upper end of the inner cylinder portion and into which an auger screw for excavation is inserted The raising / lowering operation body is provided with the screw insertion cylinder part which continues on the screw insertion port of a pile construction jig.

  The invention described in claim 4 is a discharge for discharging the filling material in the pre-boring hole in which the pile construction jig in the pile construction apparatus according to claim 1 or 2 rises through the inside of the pile body formed hollow. It has a hole.

  The invention described in claim 5 uses a yatco as a lifting operation body in the pile construction device according to any one of claims 1 to 4.

  In the invention described in claim 6, a pile construction jig having a coupling bar storage space is fitted and integrated on the pile head of the pile body where the pile head coupling bars are exposed, and the pile construction jig is inserted through the pile construction jig. This is a pile construction method in which a pile body is laid by a lifting operation body.

  According to the invention described in claim 1, the pile body in which the pile head coupling bar is exposed is moved by the lifting operation body through the pile construction jig having the coupling bar storage space fitted on the pile head. Since at least the lifting operation is performed, it is possible to lay a pile body in which the pile head connecting bars are exposed, and it is possible to solve the problem in the case of performing the cut-off work for lifting the pile head connecting bars.

  According to the second aspect of the present invention, the fitting groove portion that can be fitted and removed with respect to the protruding portion that protrudes from the side of the upper end portion of the pile body according to the rotation direction is provided at the lower portion of the jig body. The fitting groove portion of the pile construction jig and the protrusion portion of the pile body can be easily detached according to the direction in which the jig body is rotated by the operating body.

  According to the invention described in claim 3, the jig body of the pile construction jig is provided with the inner cylinder part continuous with the inner diameter surface of the pile body inside the outer cylinder part, and at the upper end of the inner cylinder part. Since the screw insertion opening is opened and the screw insertion cylinder part of the lifting operation body is continuously provided on the screw insertion opening, the auger screw for excavation is passed through these inner cylinder part, screw insertion opening and screw insertion cylinder part. This pile construction device can be applied to the medium digging method to be inserted, and even in the medium digging method, the pile body with the pile head coupling bar exposed can be laid, and the cut-off work to lift the pile head coupling bar can be performed. You can solve the problem of doing it.

  According to the invention described in claim 4, the filler in the pre-boring hole that has risen in the pile body can be discharged to the outside from the discharge hole provided in the pile construction jig. This pile construction device can be applied to the pre-boring method that inserts the pile body into the pile body, and even in the pre-boring method, it is possible to lay the pile body with the pile head connecting bar exposed, and hang out the pile head connecting bar Problems associated with the cut-off work can be solved.

  According to the invention described in claim 5, the pile head of the pile body and the pile head coupling bar can be laid from the ground level to an arbitrary depth level with the necessary length of the yatco.

  According to the invention described in claim 6, the pile construction method of laying the pile body by the lifting operation body through the pile construction jig fitted on the pile head of the pile body where the pile head coupling bar is exposed. Therefore, it is possible to eliminate the cut-off work for lifting the pile head connecting bars, and to solve the problems in the case of performing the cut-off work.

  Hereinafter, the present invention will be described with reference to the first embodiment shown in FIGS. 1 to 3, the second embodiment shown in FIGS. 4 and 5, the third embodiment shown in FIG. This will be described in detail with reference to the fourth embodiment shown in FIG.

  First, the first embodiment shown in FIGS. 1 to 3 will be described.

  The pile body 11 shown in FIG. 1 is a steel pipe concrete pile (so-called SC pile) in which a pile head coupling bar 13 protrudes from the upper end plate 12 of the pile head from the time of pile formation. This type of pile body 11 is, for example, a cover filled with cement paste that covers the exposed portion of the pile head joint bar 13 as a rust prevention measure for the pile head joint bar 13 that is a reinforcing bar exposed from the pile body 11a. Alternatively, by adopting a method such as wrapping a polyester film or the like around the exposed portion of the pile head coupling bar 13, the exposed pile head coupling bar 13 is protected from rusting before the pile body 11 is constructed.

  The pile construction device 14 provided on the upper side of the pile body 11 includes a pile construction jig 16 having a coupling bar storage space 15 fitted on the pile head of the pile body 11 where the pile head coupling bar 13 is exposed, An elevating operation body 17 for at least elevating and lowering the pile body 11 through the pile construction jig 16 is provided.

  As shown in FIG. 1, the pile construction jig 16 is arranged on the lower side of the jig body 21 formed in a cylindrical shape, and on the side of the upper end of the pile body 11 depending on the rotation direction of the jig body 21 as shown in FIG. 2. A plurality of fitting groove portions 23 that are detachable with respect to the plurality of projecting portions 22 projecting from each other are provided.

  The plurality of protrusions 22 are welded to a steel pipe 24 or a steel band, and the plurality of fitting grooves 23 are longitudinal grooves 25 formed by cutting upward from the lower end of the jig body 21 as shown in FIG. In addition, a horizontal groove 26 cut in the horizontal direction from the upper end of the vertical groove 25 is provided in an L shape.

  As shown in FIG. 1 and FIG. 3, the jig body 21 of the pile construction jig 16 is provided concentrically with the outer cylinder part 21a having the fitting groove part 23 and the inner side of the outer cylinder part 21a. And an inner cylinder portion 21b. The inner cylinder portion 21b has an inner diameter surface provided continuously with the inner diameter surface of the pile body 11 formed in a hollow shape, and a screw insertion space 27 is provided therein.

  As shown in FIGS. 1 and 3, a ring-shaped locking plate 28 that is engaged with the upper end plate 12 of the pile body 11 is welded between the lower portions of the outer cylinder portion 21a and the inner cylinder portion 21b. As shown in FIG. 3, the locking plate 28 is formed with arc-shaped connecting bar insertion holes 29 for inserting the plurality of pile head connecting bars 13, and each connecting bar insertion hole is further inserted. Between the 29 and 29, a plurality of reinforcing ribs 30 that are radially welded are disposed between the outer cylinder portion 21a and the inner cylinder portion 21b.

  As shown in FIG. 1, the jig body 21 of the pile construction jig 16 includes a screw insertion port 31 that is opened at the upper end of the inner cylinder portion 21b and into which an auger screw S for excavation is inserted. On the other hand, the lifting operation body 17 includes a screw insertion cylinder portion 32 continuous on the screw insertion port 31 of the pile construction jig 16.

  A Yatco is used as the lifting operation body 17. Assuming that the pile head laying level is deep, this Yatco has a structure in which various sizes can be detachably connected to the upper end plate portion 34 of the pile construction jig 16 by bolts 33. That is, in this YATCO, a flange-like plate 35 connected to the upper end plate portion 34 of the pile construction jig 16 is welded to the lower end portion of the screw insertion cylinder portion 32 for inserting the auger screw S. A plurality of reinforcing ribs 36 are arranged radially and welded thereon, and the bolts 33 are arranged between the reinforcing ribs 36.

  Next, the function and effect of the first embodiment will be described.

  In the middle digging method in which the auger screw S for excavation is inserted into the pile body 11, the pile construction jig 16 having the coupling bar storage space 15 is fitted on the pile head of the pile body 11 where the pile head coupling bar 13 is exposed. And engage with each other. The engagement is performed by aligning the vertical groove 25 of the fitting groove portion 23 of the pile construction jig 16 with the protrusion 22 projecting from the side surface of the upper end of the pile body 11, and the pile construction jig 16 by the lifting operation body 17. The protrusion 22 is relatively inserted into the longitudinal groove 25 by lowering the height, and further, the pile construction jig 16 is rotated by the lifting operation body 17, so that the protrusion 22 is relatively inserted into the lateral groove 26. insert. By rotating the pile construction jig 16 in the opposite direction, the protrusion 22 can be removed from the fitting groove 23.

  In this manner, the pile body 11 is lowered together with the auger screw S by the lifting operation body 17 through the pile construction jig 16 attached to the upper portion of the pile body 11 and installed. At this time, the soil and the like raised in the pile body 11 by the auger screw S is discharged to the outside through the screw insertion space 27 of the pile construction jig 16 and the screw insertion cylinder portion 32 of the lifting operation body 17.

  According to this embodiment, the pile body 11 with the pile head coupling bar 13 exposed is moved up and down through the pile construction jig 16 having the coupling bar storage space 15 fitted on the pile head. Therefore, the pile body 11 with the pile head connecting bars 13 exposed can be laid, and the cut-off work for lifting the pile head connecting bars 13 becomes unnecessary. The problem can be solved.

  In other words, the pile material cost at the embedded portion of the pile head coupling bar 13 is reduced, and cut-off is not required, so cut costs can be reduced, and the cost reduction associated with the reduction of scrap processing costs caused by the cut-off can be achieved. The effect of greatly shortening the construction period is remarkable. In addition, energy saving measures at the cut-off and resource environment countermeasure effect of steel and concrete to be scrapped are great.

  In addition, since a fitting groove 23 is provided at the lower part of the jig main body 21 so as to be detachable with respect to the protrusion 22 protruding from the side surface of the upper end portion of the pile body 11 in the rotational direction. Depending on the direction in which the main body 21 is rotated, the fitting groove 23 of the pile construction jig 16 and the protrusion 22 of the pile body 11 can be easily detached.

  The jig body 21 of the pile construction jig 16 is provided with an inner cylinder part 21b continuous with the inner diameter surface of the pile body 11 inside the outer cylinder part 21a, and a screw insertion port 31 is opened at the upper end of the inner cylinder part 21b. Since the screw insertion cylinder portion 32 of the lifting operation body 17 is continuously provided on the screw insertion port 31, the auger screw S is passed through the inner cylinder portion 21b, the screw insertion port 31, and the screw insertion cylinder portion 32. This pile construction device 14 can be applied to the intermediate digging method to be inserted, and also in the medium digging method, the pile body 11 with the pile head coupling bar 13 exposed can be laid, and the pile head coupling bar 13 is pulled out. Problems associated with the cut-off work can be solved.

  By using a Yatco having a required length as the lifting operation body 17, the pile head of the pile body 11 and the pile head coupling bar 13 can be laid from the ground level to an arbitrary depth level.

  Next, a second embodiment shown in FIGS. 4 and 5 will be described.

  In the pile construction apparatus 14 of the second embodiment, a plurality of reinforcing ribs 30a are radially welded between the upper part of the outer cylinder part 21a and the upper part of the inner cylinder part 21b as shown in FIG. In addition, as shown in FIG. 5, a connecting bar insertion hole 29a for inserting a plurality of pile head connecting bars 13 is formed in a ring-shaped locking plate 28a welded to the outer cylinder part 21a and the inner cylinder part 21b. It is continuously formed between the welded ring-shaped locking plate 28b. Other configurations and operational effects are the same as those of the first embodiment, and thus the description thereof is omitted.

  Next, a third embodiment shown in FIG. 6 will be described.

  The pile construction device 14 shown in FIG. 6 includes a pile construction jig 16 having a joint reinforcement storage space 15 fitted on the pile head of the pile body 11 from which the pile head joint reinforcement 13 is exposed, and this pile construction treatment. It is the same as that of 1st Embodiment by the point which comprised the raising / lowering operation body 17 which raises / lowers the pile body 11 via the tool 16. FIG.

  The pile construction jig 16 includes a jig body 21 formed in a cylindrical shape, and a protrusion provided on the lower side of the jig body 21 and projecting from the side of the upper end of the pile body 11 by the rotation direction of the jig body 21. The second embodiment is the same as the first embodiment also in that a fitting groove portion 23 that can be fitted and detached with respect to 22 is provided.

  Furthermore, since the upper end plate portion 34 of the pile construction jig 16 in the pile construction apparatus 14 is a closed block type, it passes through the inside of the pile body 11 formed hollow on the side surface portion of the jig body 21. A discharge hole 38 for discharging the filler in the rising pre-boring hole is provided. That is, as the pile body 11 descends in the pre-boring hole, the filler such as cement milk that has been put into the pre-boring hole rises in the pile body 11, so that this filler is discharged into the discharge hole 38. Discharge more outside.

  Further, as the lifting operation body 17, a Yatco connecting member 39a is welded to the center of the upper end plate portion 34 of the pile construction jig 16, and a hollow rod-shaped Yatco 39c is fitted to the upper end convex portion 39b of the Yatco connecting member 39a. The connecting pin 39d inserted and inserted into these pin holes is connected to the Yatco connecting member 39a and the Yatco 39c so as to be detachable. By using the Yatco 39c of a necessary length, the pile body 11 The pile head and the pile head connecting muscle 13 can be laid from the ground level to an arbitrary depth level.

  Then, in the pre-boring method in which the pile body 11 is inserted into the pre-boring hole filled with a filler such as cement milk, the coupling bar storage space 15 is formed on the pile head of the pile body 11 where the pile head coupling bar 13 is exposed. The pile construction jig 16 that is included is fitted and integrated, and the pile body 11 is laid by the lifting operation body 17 via the pile construction jig 16.

  According to the third embodiment, even in the pre-boring method in which the pile body 11 is inserted into the excavation hole filled with the filler, the filler in the pre-boring hole that has risen in the pile body is used as the pile construction jig 16. Since it can be discharged to the outside through the provided discharge hole 38, the pile body 11 with the pile head coupling bar 13 exposed can be laid through the pile construction jig 16, and the pile head coupling bar 13 can be This eliminates the problems associated with carrying out cut-off work.

  Next, FIG. 7 shows a fourth embodiment, in which the yacht shown in FIG. 1 is used as the lifting operation body 17 of the embodiment shown in FIG. By using a Yatco, the pile head of the pile body 11 and the pile head coupling bar 13 can be laid from the ground level to a level of an arbitrary depth. Other configurations and operational effects are the same as those shown in FIG.

  As described above, in both the underground digging method and the pre-boring method, the lifting operation body 17 is provided via the pile construction jig 16 fitted on the pile head of the pile body 11 where the pile head coupling bar 13 is exposed. By adopting a pile construction method for laying the pile body 11 by the above, it is possible to eliminate the need for the cut-off work for lifting the pile head connecting bars 13 and to solve the problems in the case of performing the cut-off work.

  That is, the pile body 11 with the pile head connecting bars 13 exposed is manufactured, and the pile heads are aligned at a predetermined level position lower than the ground level by the pile construction jig 16 with the pile head connecting bars 13 exposed. Therefore, the length of the pile head connecting bar 13 can be shortened from the beginning and the extra length part can be deleted, and the reinforcing bar can be erected and cut-off work can be eliminated. In addition, the pile head connecting bars can be scrapped due to the lifting cut-off operation, and the waste can be reduced, which is economical.

  In addition, although the fitting groove part of the pile construction jig | tool showed the example formed in the cut shape from the lower end of a jig | tool main body, you may form so that a concave groove may be attached to the inner surface from the lower end of a jig | tool main body. Moreover, although the example of the steel pipe concrete pile (SC pile) was shown as the pile body 11, the concrete pile (what is called PC pile or PRC pile) which made the steel pipe 24 which provided the projection part 22 shorter than the full length of the pile body 11 may be sufficient.

  INDUSTRIAL APPLICABILITY The present invention can be used when laying a pile body at a predetermined depth by a pre-boring method or a digging method.

It is sectional drawing which shows 1st Embodiment of the pile construction apparatus which concerns on this invention. It is a front view of a pile construction apparatus same as the above. It is the III-III sectional view taken on the line of FIG. It is sectional drawing which shows 2nd Embodiment of a pile construction apparatus same as the above. It is the VV sectional view taken on the line of FIG. It is sectional drawing which shows 3rd Embodiment of a pile construction apparatus same as the above. It is sectional drawing which shows 4th Embodiment of a pile construction apparatus same as the above. It is sectional drawing which shows the construction example of a pile head coupling | bonding reinforcement.

Explanation of symbols

11 Pile
13 Pile head connecting muscle
14 Pile construction equipment
15 Connecting muscle storage space
16 Pile construction jig
17 Lifting operation body
21 Jig body
21a Outer tube
21b Inner tube
22 Protrusion
23 Mating groove
31 Screw insertion slot
32 Screw insertion tube
38 discharge hole S auger screw

Claims (6)

A pile construction jig having a coupling bar storage space fitted on the pile head of the pile body where the pile head coupling bar is exposed;
A pile construction device comprising: a lifting operation body that at least lifts and lowers the pile body through the pile construction jig. Pile construction jig
A jig body formed in a cylindrical shape;
The fitting groove part which was provided in the lower part of this jig | tool main body, and was able to be fitted or detached with respect to the protrusion part which protruded from the upper end part side surface of the pile body with the rotation direction of the jig | tool main body was comprised. Pile construction equipment. The jig body of the pile construction jig is
An outer cylinder portion having a fitting groove portion;
An inner cylinder portion having an inner diameter surface provided continuously with an inner diameter surface of a pile body concentrically provided inside the outer cylinder portion,
A screw insertion opening that is opened at the upper end of the inner cylinder and into which an auger screw for excavation is inserted;
The lifting operation body is
The pile construction device according to claim 1 or 2, further comprising a screw insertion tube portion continuous on the screw insertion port of the pile construction jig. The pile construction device according to claim 1 or 2, wherein the pile construction jig includes a discharge hole for discharging the filler in the pre-boring hole that rises through the inside of the pile body formed in a hollow shape. The pile construction device according to any one of claims 1 to 4, wherein a yatco is used as the lifting operation body. A pile construction jig having a coupling bar storage space is fitted and integrated on the pile head of the pile body where the pile head coupling bar is exposed,
A pile construction method characterized in that a pile body is laid by a lifting operation body through the pile construction jig.

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