JP2008163552A - Crushing construction method and crushing device for underground tunnel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crushing construction method and a crushing device for an underground tunnel for obtaining high degree of crushing capability irrespective of a compact, light-weight, and cost-reducing structure of the device. <P>SOLUTION: The underground pile P is crushed by crushing a top part Pa of the underground tunnel P by a crushing head 3 while digging the soil on an outer side in the radial direction of the underground tunnel P by an excavation head 4 and by discharging a material M1 remaining after crushing and dropping into an annular clearance 7 between the inner periphery of a casing 1 and the outer periphery of the underground tunnel P among the materials remaining after crushing onto an outer peripheral side of the casing 1 through a discharge port 2. In this construction method, the casing 1 provided with the excavation head 4 and the crushing head 3 are integrally constituted, the materials M1 remaining after crushing are collected in the annular clearance 7 and are consolidated irrespective of integral rotation and driving of them, and rotation of a crushing unit X is prevented by friction force between the inner periphery of the casing 1 and the outer periphery of the underground tunnel P to prevent crushing by the crushing unit X from becoming impossible without fail and enable smooth and highly efficient crushing work. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an underground pile crushing method for removing piles buried in soil by crushing treatment, and a crushing treatment apparatus provided for carrying out the method.

  As a crushing method and a crushing apparatus for a pile buried in the soil, a so-called “underground pile”, for example, one disclosed in Patent Document 1 is known.

  This is a casing made of a long tubular body having an excavation head at the lower end of an auger machine that is suspended and supported so that it can be lifted and lowered, and is housed inside the casing and attached to the lower end of the casing. An auger screw having a crushing head positioned above the lower end of the casing by a predetermined dimension is attached, the casing and the auger screw are rotated in opposite directions by the auger machine, and the outer periphery of the underground pile is driven by the crushing head of the casing. Excavating the soil on the side to expose the top of the underground pile, and crushing the top with the crushing head on the auger screw side. It is designed to be discharged sequentially.

JP 2001-3363 A.

  However, in the above-mentioned publication, the casing and the auger screw are configured separately, and the casing is configured by a long tubular body that is longer than the auger screw. There has been a problem that the size and weight are increased, and the manufacturing costs and the operating expenses associated with the transportation are high.

  In addition, since the casing and the auger screw having separate structures are driven to rotate in opposite directions, the structure of the auger machine that is the driving source of the casing is complicated and a large driving capability is required. There is also the problem of incurring further cost increases.

  Therefore, the present invention has been made for the purpose of proposing an underground pile crushing method and a crushing apparatus capable of obtaining a high crushing capacity while having a small, lightweight and low-cost structure.

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

  In the underground pile crushing method according to the first invention of the present application, a circle having an inner diameter dimension that can be inserted into the radially outer side of the underground pile P at the lower end portion 56a of the auger screw 56 that is driven to rotate and lift. The casing 1 includes a casing 1 having a discharge port 2 provided on the peripheral wall 1c thereof, and screws 32 and 33, and a plurality of crushing bits 36 provided on lower end edges 32a and 33a of the screws 32 and 33. And a crushing head 3 coaxially fixed to the inner peripheral side of the upper portion 1a of the casing 1 and a plurality of excavation bits 41 attached to the lower portion 1b of the casing 1 in the circumferential direction at predetermined intervals. The processing unit X having the excavation head 4 is mounted, and the excavation head 4 crushes the top Pa of the underground pile P with the crushing head 3 while excavating the soil outside the radial pile P with the excavation head 4. The crushing residue M1 and the excavated soil N2 entering the annular gap 7 between the inner periphery of the casing 1 and the outer periphery of the underground pile P are discharged from the discharge port 2 to the outer periphery side of the casing 1. It is characterized by crushing the underground pile P.

  The second invention of the present application is characterized in that in the underground pile crushing method according to the first invention, excavation is performed while injecting fluid into the soil in the vicinity of the excavation head 4.

  In 3rd invention of this application, in the underground pile crushing processing apparatus comprised by mounting | wearing with the processing unit X to the lower end part 56a of the auger screw 56 rotated and raised / lowered, the said processing unit X is a ground pile. It is comprised by the circular pipe body which has the internal diameter dimension which can be inserted in the radial direction outer side of P, and the surrounding wall 1c is provided with the casing 1 provided with the discharge port 2, and screws 32 and 33, and these screws 32 and 33 A plurality of crushing bits 36 are provided at the lower end edges 32a and 33a of the crushing head 3, and the crushing head 3 fixed to the inner peripheral side of the part corresponding to the discharge port 2 of the casing 1 and the lower part 1b of the casing 1 are provided. An excavation head 4 comprising a plurality of excavation bits 41 attached at predetermined intervals in the circumferential direction is provided, and is detachably attached to the lower end of the auger screw 56 via the crushing head 3. It is characterized in that it is possible with.

  According to a fourth invention of the present application, in the crushing treatment apparatus according to the third invention, the discharge port 2 is superposed with the crushing head 3 in the axial direction of the casing 1 and the upper end thereof is the upper end 1d of the casing 1. It is characterized by comprising a notch opening that opens to the top.

  According to a fifth invention of the present application, in the crushing processing apparatus according to the third or fourth invention, the processing unit X is provided with an injection pipe 5 for injecting a fluid in the vicinity of the excavation head 4. Yes.

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

  (A) According to the underground pile crushing method according to the first invention of the present application, the excavation head 4 excavates the soil outside the underground pile P and the crushing head 3 uses the underground pile P. The crushing residual material M1 and the excavated soil N2 entering the annular gap 7 between the inner periphery of the casing 1 and the outer periphery of the underground pile P are removed from the discharge port 2 to the outer peripheral side of the casing 1 Since the underground pile P is crushed while being discharged, the casing 1 provided with the excavation head 4 and the crushing head 3 are integrally configured, and these are integrally rotated. Nevertheless, the crushing residue M1 and the like are accumulated in the annular gap 7 and become a solidified state, and the friction force between the inner periphery of the casing 1 and the outer periphery of the underground pile P causes the processing unit X to be solidified. Rotation is restricted and the processing unit X The crushing process by becomes impossible is and reliably prevented, crushing work smoothly and highly efficient can be realized.

  (B) According to the underground pile crushing method according to the second invention of the present application, since excavation is performed while injecting fluid to the soil in the vicinity of the excavation head 4, The excavation action by the excavation head 4 is promoted by the softening or embrittlement action of the excavated soil, and thus the speed and efficiency of the crushing work of the underground pile P are realized, and as described in (a) above The effect is even more certain.

(C) According to the underground pile crushing apparatus according to the third invention of the present application, the casing 1 is integrated with the crushing head 3 detachably attached to the lower end of the auger screw 56, and the crushing Since it is configured to rotate together with the head 3 through the auger screw 56,
(C-1) For example, as compared with the conventional case, the casing is configured separately from the crushing head, and the casing is rotationally driven separately from the crushing head 3 that is rotationally driven by the auger screw. The structure of the drive system is simplified and the cost can be reduced.
(C-2) The axial length of the casing 1 can be reduced as much as possible to reduce the size and weight of the processing unit X. As a result, the manufacturing cost of the processing unit X can be reduced, Handling of the processing unit X in the crushing processing work is easy and simple, and workability and work efficiency can be improved.
Etc. are obtained.

  Further, since the discharge port 2 is provided in the casing 1, the casing 1 is crushed by the crushing head 3 even when the casing 1 is integrated with the crushing head 3 and is integrally rotated. The crushing residue M1 and the excavated soil N2 excavated by the excavation head 4 are discharged from the discharge port 2 to the outer peripheral side of the casing 1, and the crushing residual material M1 and the like are disposed on the inner peripheral surface of the casing 1 and the inside thereof. It is possible to prevent and prevent the processing 1 from rotating and preventing the rotation of the casing 1, that is, the rotation of the entire processing unit X, from being collected between the outer peripheral surfaces of the underground piles P. The crushing operation using the unit X is realized smoothly and with high reliability.

  (D) According to the underground pile crushing apparatus according to the fourth invention of the present application, the discharge port 2 is superposed with the crushing head 3 in the axial direction of the casing 1, and the upper end thereof is Since it is constituted by a notch opening that opens to the upper end 1d, the crushed residual material generated by crushing by the crushing head 3 and the discharging action of the excavated soil N2 excavated by the excavating head 4 from the discharge port 2 are performed. Since it is performed in a wide range in the vertical direction up to the upper end 1d of the casing 1 and rotation inhibition of the processing unit X due to consolidation of crushed residual material and the like is more reliably prevented, the above (c) is described. The effect of this will be further promoted.

  (E) According to the underground pile crushing apparatus according to the fifth invention of the present application, the processing unit X includes the injection pipe 5 for injecting a fluid in the vicinity of the excavation head 4. The excavation action by the excavation head 4 is promoted by the excavation action and the softening or embrittlement action of the excavated soil, and thus the speed and efficiency of the crushing operation of the underground pile P are realized, and the above (c) The effects described in (1) can be made even more certain.

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

  In FIG. 1, the crushing processing apparatus Z of the underground pile which concerns on embodiment of this invention is shown. The crushing apparatus Z has an auger machine 55 that is moved up and down along the guide rail 52 attached to a guide rail 52 provided on the front surface of a leader 51 erected on the work vehicle 50. An auger screw 56 is connected to the lower end of the first through a rotating cylinder 54. Further, as shown in FIG. 2, a processing unit X described below is attached to the lower end of the auger screw 56. The auger screw 56 is rotationally driven by the auger machine 55 through the rotary cylinder 54, and crushes the underground pile P buried in the soil by the processing unit X.

  Hereinafter, the configuration, operational effects and the like of the processing unit X which is the gist of the present invention will be described in detail.

  As shown in FIGS. 3 and 4, the processing unit X is configured by attaching a crushing head 3 and an excavation head 4 to a casing 1.

  The casing 1 is composed of a short tubular body having an inner diameter dimension that is larger than the outer diameter of the underground pile P by a predetermined dimension, and at two positions opposed in the radial direction across the axis of the peripheral wall 1c, Each discharge port 2 is formed. The discharge port 2 is formed by a notch opening formed along the axial direction of the casing 1 from the vicinity of the lower end 1b of the casing 1 to the upper end 1a, and the opening from the lower end 2a toward the upper end 2b side. The width gradually increases and opens on the upper end 1 d of the casing 1.

  The crushing head 3 attaches a pair of screws 32 and 33 with a rotation phase of 180 ° to the outer peripheral surface of a support shaft 31 whose upper end portion is a hexagonal shaft-shaped joint portion 35, and the lower ends of the screws 32 and 33. A plurality of crushing bits 36 are attached to the edges 32a and 33a at a predetermined pitch in the extending direction of the lower edges 32a and 33a. The crushing bit 36 is fixedly attached to the screws 32 and 33 by welding or detachable by bolt fastening.

  The crushing head 3 configured in this way is fixed to the upper inside of the casing 1. In this case, in the circumferential direction of the casing 1, the lower end edges 32 a and 33 a of the screws 32 and 33 of the crushing head 3 extend linearly between intermediate portions of the pair of discharge ports 2 and 2 of the casing 1. The circumferential positions of the casing 1 and the crushing head 3 are set relatively so as to extend in the direction. In the axial direction of the casing 1, upper end edges 32 c and 33 c of the screws 32 and 33 substantially match the pair of upper ends 1 d, and the joint portion 35 protrudes upward from the upper end 1 d of the casing 1. As described above, the axial positions of the casing 1 and the crushing head 3 are relatively set. The crushing head 3 is integrated with the casing 1 by fixing the outer peripheral edges 32b and 33b of the screws 32 and 33 to the inner surface of the peripheral wall 1c of the casing 1 by welding.

  One end 5a of the injection pipe 5 is attached to the lower end portion of the support shaft 31 of the crushing head 3, and the injection pipe 5 passes through the peripheral wall 1c of the casing 1 and extends outward, It is bent to the end and extends to the lower end 1e side along the peripheral wall 1c, and the other end 5b opens downward in the vicinity of the lower end 1e. Further, one end 5a of the injection pipe 5 passes through the support shaft 31 of the crushing head 3 and extends toward the joint portion 35, and is connected to the joint portion 35 on the joint portion 35 side. A fluid (specifically, a mixed fluid of water and air) that is connected to a supply pipe (not shown) disposed on the 56 side and fed from the supply pipe side is lowered from the other end 5b of the ejection pipe 5. It is designed to spout out as a jet J.

  The excavation head 4 has a plurality of excavation bits 41 around the lower end 1e portion of the casing 1 at a predetermined interval, and the distal end portion of the excavation bit 41 extends downward from the lower end 1e. It is configured to be fixed by welding or detachable by bolt fastening.

  As described above, the processing unit X configured by integrating the casing 1, the crushing head 3, and the excavating head 4 is configured so that the joint portion 35 of the crushing head 3 is connected to the auger screw as shown in FIGS. 2 and 4. It is used by being detachably attached to the lower end of 56. Accordingly, when the auger screw 56 is rotationally driven by the auger machine 55, the processing unit X rotates together with the auger screw 56 in a certain direction (the direction of arrow R in FIG. 2).

  Then, the work procedure, the effect, etc. in the case of performing the crushing process of the underground pile P using the said crushing processing apparatus Z provided with the said processing unit X are demonstrated.

  First, the auger screw 56 is connected to the auger machine 55 via the rotary cylinder 54, the processing unit X is mounted on the lower end 56 b of the auger screw 56, and the injection pipe 5 is connected to the auger screw 56. Connect to the supply pipe side.

  Thereafter, the auger machine 55 is lowered to correspond to the processing unit X in a state of covering the top side of the underground pile P embedded in the soil G. In this state, the auger machine 55 is started to rotate the processing unit X integrally with the auger screw 56, and the auger machine 55 is lowered at a required speed while the jet J is ejected from the jet pipe 5. Let

  Then, the processing unit X has the above-described synergistic effects such as the excavation action by each excavation bit 41 of the excavation head 4 and the excavation action by the jet J from the injection pipe 5 and the softening or embrittlement action of the excavated soil. As the soil G around the underground pile P is excavated, it gradually descends.

  After the crushing bit 36 of the crushing head 3 reaches the top Pa of the underground pile P, the crest bit 36 crushes the top Pa of the underground pile P. The excavating action of the soil G by the excavating head 4 and the crushing action of the underground pile P by the crushing head 3 proceed simultaneously, and the underground pile P is sequentially crushed from the top Pa side to the tip Pb side. Is done.

  In this case, among the excavated soil generated by excavation by the excavation head 4 of the processing unit X, the excavated soil N1 generated in the annular gap 9 between the outer peripheral surface of the casing 1 and the excavated hole wall 8 located outside thereof. And excavation that occurs in the annular gap 7 between the inner peripheral surface of the casing 1 and the outer peripheral surface of the underground pile P inside thereof, and then is discharged to the annular gap 9 side through the discharge port 2. Of the crushing residue generated by crushing by the soil N2 and the crushing head 3, the crushing of a relatively small lump that is dropped into the annular gap 7 and then discharged to the annular gap 9 side through the discharge port 2 The three remaining materials M1 move up in the annular gap 9 in a mixed state and are moved to the upper side of the processing unit X.

  Of the crushing residue produced by crushing by the crushing head 3, a relatively large crushing crushing material M <b> 2 is moved to the upper side of the processing unit X by the screws 32 and 33 of the crushing head 3.

  Then, the mixture of the excavated soil N1, N2 and the crushing residue M1 that has risen through the annular gap 9 and the crushing residue M2 that has been raised by the screws 32, 33 of the crushing head 3 are located in the upper part of the processing unit X. Further, the mixture is mixed to become a discharged residual material M0, delivered to the auger screw 56 side, and sequentially discharged to the ground side by the screw blades of the auger screw 56. By such an action, the crushing process of the underground pile P is sequentially advanced.

  Here, the processing unit X has an integrated configuration including the casing 1, the crushing head 3, and the excavation head 4, and is integrally rotated by the auger screw 56, while existing inside the casing 1. Since the underground pile P is a non-rotating object, excavated soil and crushed residual material are present in the annular gap 7 between the inner peripheral surface of the casing 1 and the outer peripheral surface of the underground pile P inside. If this is accumulated and solidified, the rotational friction force increases, and accordingly, the rotational load of the auger machine 55 increases. In some cases, the crushing operation itself cannot be performed due to insufficient rotational driving force of the processing unit X. There is.

  However, in the processing unit X of this embodiment, the casing 1 is provided with the discharge port 2, and crushed residual material or excavated soil generated in the annular gap 7 is discharged to the annular gap 9 side through the discharge port 2. Therefore, caking of the crushing residue in the annular gap 7 can be prevented without fail, and the crushing of the underground pile P due to the rotation of the processing unit X is achieved. The processing work is performed smoothly and continuously, and as a result, reliability in the crushing processing work by the processing unit X is ensured.

  Further, in this case, the discharge port 2 is superposed with the crushing head 3 in the axial direction of the casing 1 and the upper end thereof is constituted by a notch opening that opens to the upper end 1d of the casing 1. The above processing unit is configured so that the crushing residue generated by crushing at the head 3 is discharged from the discharge port 2 in a wide range in the vertical direction up to the upper end 1d of the casing 1, and the crushing residue is consolidated. Since the rotation inhibition of X is more reliably prevented, the operational effect by providing the above-described discharge port 2 is further promoted.

On the other hand, when attention is paid to the shape of the processing unit X, the casing 1 is integrated with the crushing head 3 that is detachably attached to the lower end of the auger screw 56, and the auger screw 56 is moved together with the crushing head 3. Because it is configured to rotate through
(I) For example, as compared with the conventional case, the casing is configured separately from the crushing head, and the casing is driven to rotate separately from the crushing head 3 that is rotationally driven by the auger screw. The system structure is simplified and its cost can be reduced.
(B) The axial length of the casing 1 can be shortened as much as possible to reduce the size and weight of the processing unit X. As a result, the manufacturing cost of the processing unit X can be reduced and the crushing process can be performed. The handling of the processing unit X in the work is easy and simple, and workability and work efficiency can be improved.
Etc. are obtained.

  In the above-described embodiment, the discharge ports 2 are provided at opposite positions sandwiching the axis of the casing 1, but the number of the discharge ports 2 is not limited. It can be arbitrarily set according to various conditions such as the concrete quality of the underground pile P. The same applies to the shape of the discharge port 2.

  Further, in this embodiment, the auger machine 55 and the auger screw 56 are connected via the rotary cylinder 54, but the present invention is not limited to such a configuration, In the embodiment, for example, the auger screw 56 may be directly connected to the auger machine 55 without including the rotating cylinder 54.

1 is an overall view of an underground pile crushing apparatus according to an embodiment of the present invention. It is an enlarged view of the II section of FIG. It is a perspective view of the crushing unit shown in FIG. It is a partial cross section side view of the crushing unit shown in FIG.

Explanation of symbols

1 ·· Casing 2 ·· Discharge port 3 ·· Crushing head 4 ·· Drilling head 5 ·· Injection pipe 7 ·· Ring gap 8 ·· Drilling hole wall 9 ·· Ring hole 31 ·· Support shaft 32 ·· 1 Screw 33 ·· Second screw 35 · · Joint portion 36 · · Crushing bit 41 · · Excavation bit 50 · · Working vehicle 51 · · Leader 52 · · Guide rail 54 · · Rotating cylinder 55 · · Organ machine 56・ ・ Auger screw G ・ ・ Soil J ・ ・ Jump P ・ ・ Underground pile X ・ ・ Processing unit Z ・ ・ Fracture processing equipment

Claims (5)

The lower end portion (56a) of the auger screw (56) that is driven to rotate and move up and down is constituted by a circular pipe body having an inner diameter dimension that can be fitted to the radially outer side of the underground pile (P) and its peripheral wall (1c) ) Includes a casing (1) provided with a discharge port (2) and screws (32, 33), and a plurality of crushing bits (36 on the lower edges (32a, 33a) of the screws (32, 33). ) And the crushing head (3) fixed coaxially to the inner peripheral side of the upper part (1a) of the casing (1), and the lower part (1b) of the casing (1) in the circumferential direction. A processing unit (X) equipped with a drilling head (4) composed of a plurality of drilling bits (41) attached at predetermined intervals is mounted,
While crushing the top (Pa) of the underground pile (P) with the crushing head (3) while excavating the soil (G) radially outside the underground pile (P) with the excavating head (4). The crushed residual material (M1) and excavated soil (N1) entering the annular gap (7) between the inner periphery of the casing (1) and the outer periphery of the underground pile (P) are passed through the discharge port (2). The underground pile crushing method, wherein the underground pile (P) is crushed while being discharged to the outer peripheral side of the casing (1). In claim 1,
A method for crushing underground piles, wherein the excavation head (4) is excavated while injecting fluid into the soil in the vicinity. An underground pile crushing treatment apparatus configured by attaching a processing unit (X) to a lower end part (56a) of an auger screw (56) that is driven to rotate and lift,
The processing unit (X)
A casing (1) which is formed of a circular tube body having an inner diameter dimension that can be fitted to the outer side in the radial direction of the underground pile (P), and whose peripheral wall (1c) is provided with a discharge port (2);
A plurality of crushing bits (36) are provided at the lower end edges (32a, 33a) of the screw (32, 33) and the discharge port (2) of the casing (1). Crushing head (3) fixed to the inner peripheral side of the part corresponding to
A drilling head (4) comprising a plurality of drilling bits (41) attached to the lower part (1b) of the casing (1) in the circumferential direction at a predetermined interval;
A crushing treatment apparatus characterized in that it can be detachably attached to the lower end of the auger screw (56) via the crushing head (3). In claim 3,
The discharge port (2) is overlapped with the crushing head (3) in the axial direction of the casing (1) and has a notch opening whose upper end opens at the upper end (1d) of the casing (1). The crushing processing apparatus characterized by having. In claim 3 or 4,
The crushing processing apparatus, wherein the processing unit (X) includes an injection pipe (5) for injecting a fluid in the vicinity of the excavation head (4).

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