JP2009127306A - Extraction equipment for buried pile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide structural simple extraction equipment for a buried pile, which exerts high reliability and certainty during operations. <P>SOLUTION: This extraction equipment comprises: an auger which is suspended and supported on a crane apparatus in the state of not being rotated on a vertical axis; a hydraulic swivel joint which is connected to a lower end of the auger; and a casing 3 which has an inside diameter dimension large enough to allow the outside of the buried pile 9 to be fitted and inserted in it, and in which a plurality of excavating claws 36 are circumferentially mounted at predetermined intervals at its lower end. A plurality of clamping units 10, which can clamp the buried pile, fitted and inserted into the casing 3, from the outside thereof, are provided at the lower end 3b of the casing 3. The casing 3 is rotatively driven by the auger, lowered while soil around the buried pile 9 is excavated by means of the excavating claws 36, and pulled up by the crane apparatus 3 in the state of making the buried pile 9 clamped and held by each of the clamping units 10, so that the buried pile 9 can be extracted. Thus, the operation of extracting the buried pile 9 can be efficiently performed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a buried pile removing apparatus used for removing a buried pile buried in the ground.

  Conventionally, various proposals have been made as an apparatus or a construction method for removing the buried pile buried in the soil (see, for example, Patent Documents 1 to 4).

  Patent Document 1 shows that a sheet pile having a short pipe at the lower end is driven around a buried pile by a vibration pile driver, and a wire set in the short pipe is hung around the buried pile. The buried pile is removed by pulling up.

  In the one shown in Patent Document 2, an auger screw having an auger bit at its lower end is integrated in a casing having a drilling claw at its lower end, and this is rotated by an auger machine to excavate around the buried pile. At the same time, the buried pile is lowered while being crushed by the auger bit, and the remaining portion of the buried pile is locked from the side by a locking claw provided on the casing side, and is pulled out by pulling it up.

  In Patent Document 3, the casing is driven around the buried pile, the chuck provided on the casing side is pressed against the outer peripheral surface of the buried pile, the buried pile is sandwiched, and the casing is pulled up. The buried pile is removed together with the casing.

  In Patent Document 4, the casing is driven around the buried pile by a pile driving machine, and when this reaches the lower end of the buried pile, the hooking claw provided on the casing side is inclined at the lower end of the buried pile. The buried pile is removed together with the casing by pulling the casing and pulling up the casing.

JP 2004-308338 A JP 2001-3363 A JP 2006-37657 A JP 2004-339892 A

  However, the one shown in Patent Document 1 has a problem in terms of reliability and reliability of the work because the work of laying the wire around the buried pile is performed on the bottom side of the excavation hole.

  In the thing shown by patent document 2, although the said latching claw is locked in the state which bite into the surface of the buried pile slightly in the latching position, the pulling-up force of the said casing is the said buried pile of the said latching claw. Since it is not structured to increase the biting force to the side, it is feared that the surface of the buried pile is chipped at the portion of the locking claw as the casing is pulled up, and the buried pile slides down. Problems remain in terms of certainty and reliability.

  Since the configuration shown in Patent Document 3 is configured to drive a plurality of chucks, which are spaced apart in the circumferential direction on the inner surface side of the casing, by individual hydraulic cylinders, synchronous adjustment between the hydraulic cylinders is performed. In some cases, the gripping action of the buried pile by the chucks may be impaired.

  In the thing shown by patent document 4, since it is necessary to drive this casing until the latching claw provided in the said casing side is located below the lower end inclined surface of the said buried pile, it is improved in terms of workability. There is room.

  Accordingly, the present invention has been made for the purpose of providing a buried pile removal apparatus having a simple structure and high operational reliability and reliability.

  In the present invention, the following configuration is adopted as a specific means for solving such a problem.

  In the buried pile removing apparatus according to the first invention of the present application, the auger 1 suspended and supported by the crane apparatus 60 in a non-rotating state around the vertical axis, and the hydraulic swivel joint 2 connected to the lower end of the auger 1 And a casing 3 having an inner diameter dimension capable of being inserted with a predetermined gap outside the buried pile 9 embedded in the soil, and having a plurality of excavation claws 36 attached to the lower end thereof at predetermined intervals in the circumferential direction. In addition, the lower end portion 3b of the casing 3 is provided with a plurality of clamping units 10 that can clamp the buried pile 9 inserted and inserted into the casing 3 from the outside thereof. The excavation claw 36 is used to lower the soil around the buried pile 9 while excavating the soil, and the crane unit 60 holds the buried pile 9 while holding the buried pile 9 with the respective clamping units 10. It is characterized by being configured so as to removed the embedded pile 9 by raising the casing 3.

  In the second invention of the present application, in the buried pile removing apparatus according to the first invention, the clamping unit 10 is provided with a curved contact surface 25a capable of contacting the outer peripheral surface of the buried pile 9. The pressing plate 25 is connected to the casing 3 side so as to be pivotable in the vertical direction, and the pressing plate 25 is connected to the tip side of the pressing plate 25, and inclines upward toward the inner diameter side of the casing 3 at the first position. In this state, the pressing plate 25 is brought into contact with the outer peripheral surface of the buried pile 9, and retracted radially outward of the casing 3 in the second position to move the pressing plate 25 from the outer peripheral surface of the embedded pile 9. It is characterized by comprising an operating arm 12 for separating and a position changing means 4 for rotating the operating arm 12 from the first position to the second position side.

  In the third invention of the present application, in the buried pile removing apparatus according to the second invention, a plurality of engaging protrusions 26 extending in the circumferential direction are provided on the contact surface 25a of the pinching plate 25 in multiple stages in the vertical direction. It is characterized in that it was provided.

  The fourth invention of the present application is characterized in that, in the buried pile removing apparatus according to the second invention, a synchronization means 35 for synchronizing the clamping unit 10 is provided.

  In the present invention, the following effects can be obtained.

(A) According to the buried pile removing apparatus according to the first invention of the present application, the auger 1 is supported by the crane apparatus 60 in a non-rotating state around the vertical axis, and is connected to the lower end of the auger 1. The hydraulic swivel joint 2 has an inner diameter dimension that can be inserted with a predetermined clearance outside the buried pile 9 buried in the soil, and a plurality of excavation claws 36 are attached to the lower end thereof at predetermined intervals in the circumferential direction. The casing 3 is provided with a plurality of clamping units 10 at the lower end portion 3b of the casing 3 which can clamp the buried pile 9 inserted into the casing 3 from the outside. Is driven by the auger 1 and lowered while excavating the soil around the buried pile 9 with the excavating claw 36, and the crane apparatus is held in a state where the buried pile 9 is clamped and held by the respective clamping units 10. 60 Therefore since configured to removed the embedded pile 9 by pulling the casing 3,
(A-1) The casing 3 provided with the excavation claw 36 at the tip is rotationally driven by the auger 1 and the excavation work for lowering the soil around the existing pile 9 into the soil while excavating the soil, and the above-mentioned clamping units 10 The buried pile 9 can be removed from the soil by a holding work for holding the buried pile 9 and a pulling work for lifting the casing 3 by the crane device 60. Can be done efficiently,
(A-2) The auger 1 and the casing 3 are suspended and supported by the crane device 60. For example, the operation is performed in comparison with a removal device that requires the use of a heavy machine such as a reader. Improved convenience or versatility
Etc. are obtained.

(B) According to the buried pile removing apparatus according to the second invention of the present application, in the buried pile removing apparatus according to the first invention, the pressing unit 10 is placed against the outer peripheral surface of the buried pile 9. A pressure plate 25 having a curved contact surface 25a that can be contacted is connected to the casing 3 so as to be pivotable in the vertical direction, and the pressure plate 25 is connected to the front end side of the pressure plate 25. Then, the pressure-clamping plate 25 is inclined upward toward the inner diameter side of the casing 3 and brought into contact with the outer peripheral surface of the buried pile 9, and in the second position, it is retracted toward the radially outer side of the casing 3. Since it comprises the operating arm 12 that separates the pressure plate 25 from the outer peripheral surface of the buried pile 9 and the position changing means 4 that rotates the operating arm 12 from the first position to the second position side,
(B-1) In the state where the operating arm 12 is set at the first position, the pressing plate 25 is placed on the outer periphery of the buried pile 9 while the operating arm 12 is inclined upward toward the inner diameter side of the casing 3. When the casing 3 is pulled upward from this state, the pulling force is a force that presses the clamping plate 25 against the outer peripheral surface of the buried pile 9 via the operating arm 12. Working, the holding pressure holding performance of the buried pile 9 by the holding unit 10 is enhanced, and a reliable or reliable removal operation without sliding of the buried pile 9 is realized.
(B-2) In the state where the operating arm 12 is set to the second position, the clamping plate 25 of each clamping unit 10 is separated from the outer peripheral surface of the buried pile 9, so that the periphery of the buried pile 9 The excavation and descent work of the casing 3 to the wall is easily performed without any trouble, and the removal work of the buried pile 9 after the removal of the buried pile 9 can be easily performed, and the workability through the removal work of the buried pile 9 is improved. improves,
Etc. are obtained.

(C) In the buried pile removing device according to the third invention of the present application, in the buried pile removing device according to the second invention, a plurality of circumferentially extending on the contact surface 25a of the holding plate 25 Since the hanging protrusion 26 is provided in multiple stages in the vertical direction,
(C-1) When the pinching plate 25 of the pinching unit 10 is pressed against the outer peripheral surface of the buried pile 9 as the support cylinder 3 is pulled up, the latching protrusion 26 is the outer periphery of the buried pile 9. Biting into the surface, and by the latching action of this biting portion, sliding of the buried pile 9 is more reliably prevented, improving operational reliability.
(C-2) Since the hooking protrusions 26 are provided in multiple stages in the vertical direction on the clamping plate 25, the buried pile 9 is clamped and held by the clamping plate 25 in a relatively wide range in the vertical direction. Therefore, even if each of the clamping units 10 is provided at the same position in the vertical direction, the buried pile 9 is removed in a substantially vertical posture without being tilted. To ensure the safety of
Etc. are obtained.

  (E) In the buried pile removing apparatus according to the fourth invention of the present application, since the buried pile removing apparatus according to the second invention is provided with the synchronizing means 35 for operating each of the clamping units 10 synchronously. The buried piles 9 are securely held by the clamping plates 25 of the respective clamping units 10, and a highly safe operation without the sliding of the buried piles 9 is realized.

  Hereinafter, the present invention will be specifically described based on preferred embodiments.

  In FIG.1 and FIG.2, the extraction apparatus Z of the buried pile which concerns on embodiment of this invention is shown.

"Constitution"
As shown in FIG. 4, the extraction device Z is suspended and supported via a pin 39 attached to the tip of a boom head 61 a provided at the tip of the boom 61 of the crane device 60 in the horizontal direction. An auger 1 connected to the boom head 61a by the pin 39 and non-rotating around a vertical axis, and a hydraulic swivel joint coaxially connected to the lower end of the auger 1 2 and a casing 3 connected to the lower end of the hydraulic swivel joint 2 coaxially with the hydraulic swivel joint 2 via an end plate 34.

  The casing 3 is formed of a steel pipe having a predetermined inner diameter (that is, a diameter dimension in which the embedded pile 9 can be fitted with an annular gap inside). On the upper part 3a of the casing 3, hydraulic cylinders 4 are attached substantially vertically downward at two positions on the outer peripheral surface facing each other across the axis. An operation rod 6 is connected to the cylinder rod of the hydraulic cylinder 4.

  On the other hand, on the lower end portion 3b of the casing 3, three clamping units 10 described below are arranged.

  The clamping unit 10 clamps and holds the buried pile 9 inserted into the inside of the casing 3 from three places in the circumferential direction. As shown in FIG. A bracket 11 is provided at the lower edge portion of the opening 17 provided at the lower end of the actuator, and a working arm 12 having a predetermined length is pivoted on the bracket 11 via a fulcrum pin 21 on a surface along the radial direction of the casing 3. And one end of a pressing plate 25 and a link bar 13 which will be described later are supported by a fulcrum pin 22 at the tip of the operating arm 12 at the same time. The other end of the link bar 13 is connected to the ring body 35 described below.

  The ring body 35 corresponds to the “synchronizing means” in the claims, and as shown in FIG. 3, a short circular pipe 35b loosely fitted radially outward of the casing 3 and the circular pipe 35b The other end of the link bar 13 of the clamping unit 10 is connected to brackets 37 provided at three locations in the circumferential direction on the lower surface side of the annular plate 35a. ing.

  Furthermore, the lower end of the operating rod 6 is connected to two positions opposed to each other with the center of the annular plate 35a of the ring body 35 sandwiched in the radial direction. Accordingly, when the pair of hydraulic cylinders 4 and 4 are expanded and contracted, the ring body 35 is moved in the vertical direction via the operation rods 6. The link bar 13 and the operating arm 12 of the unit 10 bend and operate in synchronization with each other, and the following pressing plate 25 attached to the fulcrum pin 22 connecting them is advanced and retracted in the radial direction of the casing 3. Will be moved. That is, the hydraulic cylinder 4 functions as “position changing means” in the claims.

  Here, a specific configuration of the pressing plate 25 will be described. The pressing plate 25 is integrally formed of a curved plate having a curved surface with a curvature that follows the curved shape of the outer peripheral surface of the existing pile 9. On the circumferential surface 25a (that is, the surface that abuts the outer circumferential surface of the existing pile 9), hooking ridges 26 extending in the circumferential direction are formed in a plurality of stages at predetermined intervals in the vertical direction.

  And in this 1st position, as shown to the left half part of FIG. 3 (A), this clamping plate 25 is extended to radial inner side in the state which the said operating arm 12 inclined upwards, and the said clamping plate 25 of The inner peripheral surface 25 a is in contact with the outer peripheral surface of the existing pile 9, and each of the latching protrusions 26 bites into the outer peripheral surface of the existing pile 9.

  On the other hand, in the second position, as shown in the right half part of FIG. 3 (a), the operating arm 12 rotates backward from the posture in the first position to the outer side in the radial direction. Thus, the clamping plate 25 is retracted radially outward from the position of the outer peripheral surface of the existing pile 9 and is in a non-contact state with respect to the outer peripheral surface of the existing pile 9.

  The first position of the pressure plate 25 is realized by the hydraulic cylinder 4 extending and the ring body 35 being lowered via the operation rod 6. In addition, the second position is realized by the hydraulic cylinder 4 being contracted and the ring body 35 being pulled up via the operation rod 6.

  Further, in the second position, the clamping plate 25 has a substantially vertical posture (that is, the clamping plate 25 of the clamping plate 25) when the stopper pin 27 protruding from the operating arm 12 is engaged with the clamping plate 25. The inner peripheral surface 25a is held in a posture that is substantially parallel to the outer peripheral surface of the existing pile 9.

  On the other hand, as shown in FIG. 1, a jet hose 51 extending from a jet supply source 58 installed on the ground side is drawn into the auger 1 side. Further, the jet hose 51 is connected to the jet pipe 52 here, and the jet pipe 52 is drawn downward along the inner surface of the casing 3 and opened downward at the lower end portion 3b of the casing 3. A jet (a fluid mixture of water and pressurized air) is ejected downward from the opening.

"Description of Usage"
Then, with reference to FIGS. 4-7, the extraction operation | work of the existing pile 9 embed | buried in the soil using the said extraction apparatus Z is demonstrated.

A: Prior work (see Figure 4)
In the extraction operation, first, as shown in FIG. 4, the pile buried portion of the ground G is excavated by an excavator (not shown) to expose the upper end portion of the existing pile 9 in the excavation hole Ga.

  In addition, the crane device 60 is installed at a predetermined position near the excavation hole Ga, the boom head 61a at the tip of the boom 61 is suspended and supported by the boom device 61, and the lower end portion thereof, that is, the lower end of the casing 3 is supported. The portion 3b is positioned directly above the upper end of the existing pile 9. The positioning operation of the extraction device Z is performed by the expansion and contraction movement and the undulation movement of the boom 61.

  In this preliminary work, a jet hose 51 extending from a jet supply source 58 installed on the ground G side is connected to the auger 1 side, and a hydraulic hose 53 extending from a hydraulic power source 59 is connected to the hydraulic swivel joint 2 side. To do.

B: Excavation work (see Fig. 5)
After completion of the preliminary work, the hydraulic cylinder 4 is reduced to set the clamping plate 25 of the clamping unit 10 to the second position, and the existing pile 9 enters the inside of the clamping plate 25 of each clamping unit 10. To get.

  Thereafter, as shown in FIG. 5, while the auger 1 is driven and the casing 3 is rotated, the extraction device Z is gradually lowered and the jet is ejected from the jet pipe 52. Then, the casing 3 gradually descends while perforating the outer peripheral side of the existing pile 9 by a synergistic action of the softening / disintegration action of the soil by the jet jet and the excavation action by the excavation claw 36. As shown in FIG. 6, this excavation work is continued until the lower end 3 b of the casing 3 reaches the tip 9 a of the existing pile 9.

C: Pile holding work (see FIGS. 6 and 3)
When the lower end portion 3b of the casing 3 reaches the tip end portion 9a of the existing pile 9 and the excavation work is completed, the process shifts to a pile holding work. That is, as shown in FIG. 3, when the lower end 3 b of the casing 3 of the extraction device Z reaches the tip 9 a of the existing pile 9, the lowering of the extraction device Z is stopped. At this time, the hydraulic cylinder 4 is extended to change the position of the pressing plates 25 of the pressing units 10 from the second position to the first position. 9 is held under pressure.

  In this case, the holding plate 25 of each holding unit 10 is operated synchronously via the ring body 35, so that the holding pressure of the buried pile 9 by each holding plate 25 can be surely maintained.

  Moreover, the latching protrusion 26 of each said clamping board 25 bites into the outer peripheral surface of the said existing pile 9 moderately, and the clamping pressure holding effect | action with respect to this existing pile 9 is ensured.

D: Removal work (see Fig. 7)
Next, the boom 61 of the crane device 60 is lifted while being extended, and a pulling force in the vertically upward direction is applied to the extraction device Z. At this time, as described above, in the clamping unit 10, since the operating arm 12 supporting the clamping plate 25 is inclined upward, when the casing 3 is pulled upward, A rotating force in the horizontal direction acts on the operating arm 12, and the pressing plate 25 is further pressed toward the existing pile 9 by the rotating force. Accordingly, the latching action by the biting of the latching ridge 26 and the frictional latching action by pressing the clamping plate 25 against the existing pile 9 work synergistically, and the existing pile by the respective clamping units 10 9 is further increased, and the existing pile 9 is prevented from slipping in the middle of pulling out, and high operational reliability and reliability are ensured.

  Further, in this case, since the hooking protrusions 26 are provided in multiple stages in the vertical direction on the clamping plate 25, the buried pile 9 is held by the clamping plate 25 in a relatively wide range in the vertical direction. Therefore, even if each of the clamping units 10 is provided at the same position in the vertical direction, the buried pile 9 is removed in a substantially vertical posture without being tilted. Safety is ensured.

  Then, as shown in FIG. 7, when the extraction device Z is completely pulled out from the soil together with the existing pile 9, it is moved to the ground G side, and in this state, the hydraulic cylinder 4 is contracted to By changing the position of the pressure plate 25 of the pressure unit 10 from the first position to the second position, the existing pile 9 can be easily detached from the removal device Z side.

It is a front view of the extraction apparatus of the buried pile which concerns on embodiment of this invention. It is an II-II arrow line view of FIG. It is an enlarged view of the III section of FIG. It is 1st process explanatory drawing in the extraction operation | work of a buried pile. It is 2nd process explanatory drawing in the extraction operation | work of a buried pile. It is 3rd process explanatory drawing in the extraction operation | work of a buried pile. It is 4th process explanatory drawing in the extraction operation | work of a buried pile.

Explanation of symbols

1 ·· Auger 2 · · Hydraulic swivel joint 3 · · Casing 4 · · Hydraulic cylinder (position changing means)
5 .. Support body 6 .. Operation rod 9 .. Embedded pile 10 .. Clamping unit 11 .. Base 12 .. Working arm 13 .. Link bar 15 .. Guide material 16 .. Guide groove 17. ..Supporting pin 22 ..Supporting pin 23 ..Supporting pin 25 ..Pressing plate 26 ..Latching protrusion 27 ..Stopper 34 ..End plate 35 ..Ring body (synchronizing means)
36 ·· Drilling claw 37 ·· Bracket 39 ·· Pin 51 ·· Jet hose 52 ·· Jet pipe 53 ·· Hydraulic hose 58 ·· Jet supply source 59 ·· Hydraulic source 60 ·· Crane device 61 ·· Boom Z ·・ Extraction device

Claims (4)

An auger (1) suspended and supported by the crane device (60) in a non-rotating state around the vertical axis;
A hydraulic swivel joint (2) connected to the lower end of the auger (1);
A casing (having an inner diameter dimension that can be inserted with a predetermined gap on the outside of an embedded pile (9) embedded in the soil, and a plurality of excavating claws (36) attached to the lower end thereof at predetermined intervals in the circumferential direction ( 3) with
The lower end (3b) of the casing (3) includes a plurality of clamping units (10) capable of clamping the buried pile (9) inserted into the casing (3) from the outside,
The casing (3) is driven to rotate by the auger (1) and lowered while excavating the soil around the buried pile (9) with the excavation claw (36), and the crushing unit (10) is used to lower the casing (3). A buried pile, wherein the buried pile (9) is pulled out by pulling up the casing (3) by the crane device (60) while holding the buried pile (9). Extraction device. In claim 1,
The clamping unit (10) is
A clamping plate (25) having a curved contact surface (25a) capable of contacting the outer peripheral surface of the buried pile (9);
The casing (3) is connected to the casing (3) so as to be pivotable in the vertical direction, and the pinching plate (25) is connected to the tip of the casing (3). In its first position, it rises toward the inner diameter side of the casing (3). In this state, the pressure plate (25) is brought into contact with the outer peripheral surface of the buried pile (9), and in the second position, the pressure plate (25) is moved backward in the radial direction of the casing (3). An operating arm (12) spaced from the outer peripheral surface of the buried pile (9);
Position changing means (4) for changing the position of the operating arm (12) from the first position to the second position;
A buried pile removing device characterized by comprising: In claim 2,
The buried pile removing apparatus, wherein a plurality of engaging protrusions (26) extending in the circumferential direction are provided in multiple stages in the vertical direction on the contact surface (25a) of the pressing plate (25). . In claim 2,
A buried pile removing apparatus, wherein a synchronizing means (35) for synchronizing the clamping units (10) is provided.

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