WO2013084543A1 - トンネル掘削装置 - Google Patents
トンネル掘削装置 Download PDFInfo
- Publication number
- WO2013084543A1 WO2013084543A1 PCT/JP2012/070430 JP2012070430W WO2013084543A1 WO 2013084543 A1 WO2013084543 A1 WO 2013084543A1 JP 2012070430 W JP2012070430 W JP 2012070430W WO 2013084543 A1 WO2013084543 A1 WO 2013084543A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- excavation
- shell
- gap
- tunnel
- space
- Prior art date
Links
- 238000009412 basement excavation Methods 0.000 title claims abstract description 170
- 239000002689 soil Substances 0.000 claims abstract description 61
- 230000007246 mechanism Effects 0.000 claims abstract description 59
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 24
- 230000004308 accommodation Effects 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 8
- 238000009825 accumulation Methods 0.000 abstract 6
- 230000002093 peripheral effect Effects 0.000 description 17
- 238000000034 method Methods 0.000 description 12
- 239000003638 chemical reducing agent Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/13—Devices for removing or hauling away excavated material or spoil; Working or loading platforms using hydraulic or pneumatic conveying means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
- E21D9/0657—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end structurally associated with rock crushers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1053—Making by using boring or cutting machines for making a slit along the perimeter of the tunnel profile, the remaining core being removed subsequently, e.g. by blasting
Definitions
- the present invention relates to a tunnel excavating device for excavating the ground in an annular shape.
- the ring shield method has been known as a method for more efficiently constructing a shield tunnel having a large cross section.
- the ring shield method using a cylindrical excavator that excavates the ground with a cutter provided in the annular shape at the tip, the ground in a position corresponding to the outer shell of the tunnel is excavated in a cross-sectional annular shape in advance.
- the excavated soil is accommodated in the slip accommodating portion from the earth and sand intake provided in the front surface of the excavator main body, and the excavated soil is provided by the mud pipe provided in the rear portion of the slip accommodating portion. Is carried out of the device.
- the excavated soil may be clogged in the mud pipe, and the excavated soil may not be carried out smoothly.
- the present invention has been made in view of the above problems, and an object of the present invention is to enable the excavation apparatus excavating the ground in an annular shape to smoothly carry out the excavated soil generated by excavating the ground. is there.
- the tunnel excavator of the present invention is a cylindrical tunnel excavator for excavating a tunnel in the ground, and is provided on the distal end surface of the tunnel excavator in the direction of excavation, and a bit for excavating the ground on the distal end surface
- An excavating mechanism including an annular cutter unit that can be rotationally driven, a cylindrical outer cylinder, and a cylindrical inner cylinder that is arranged concentrically with the outer cylinder and has a smaller diameter than the outer cylinder.
- a tunnel excavation device having a shell body connected to the rear of the tip surface, a propulsion mechanism for propelling the excavation mechanism in the direction of excavation, and excavation soil excavated by the excavation mechanism from an opening formed in the tip surface
- the excavated soil discharging mechanism which is accommodated in the accommodating space formed between the inner cylindrical body and the outer cylindrical body in front of the inner cylindrical body and discharges into the inner space of the tunnel excavator from the gap formed in the rear portion of the accommodating space of the inner cylindrical body
- the excavated soil discharge mechanism is an accommodation space A plate material provided so as to incline in the circumferential direction toward the rear, and the plate material rotates together with the cutter portion, whereby the excavated soil accommodated in the accommodation space is formed behind the accommodation space It is sent to.
- the plate material is provided so as to incline backward in the accommodation space, excavation accommodated in the accommodation space by the plate material by rotating the plate material together with the cutter unit.
- the soil can be smoothly fed rearward to the rear of the housing space and discharged to the inner space of the excavator.
- the shell body includes a first shell body and a second shell body, which are provided in order from the front side in the excavation progress direction, and the first shell body is the first shell body together with the cutter portion.
- the housing space is formed in the first shell, and the gap is formed between the rear edge of the inner shell of the first shell and the front of the inner shell of the second shell. It is formed between the edges.
- a portion below a predetermined height of a gap provided at a rear edge of the inner cylinder of the first shell and a front edge of the inner cylinder of the second shell is closed.
- a closing plate is provided, whereby the gap opens to the inside of the inner cylinder above a predetermined height.
- the gap between the rear edge of the inner cylinder of the first excavation shell and the front edge of the inner cylinder of the second excavation shell is closed by the closing plate. Therefore, the excavated soil discharged from the gap to the inside of the apparatus can be prevented from accumulating downward and closing the gap, and clogging of the excavated soil discharge mechanism can be prevented.
- excavation soil accommodated in the accommodation space is sent from the opening formed in the distal end surface of the excavator to the gap provided behind the accommodation space by the plate material, and is discharged from the gap to the inside of the apparatus. Therefore, excavated soil can be carried out smoothly.
- FIG. 1 is a perspective view showing an excavator according to a first embodiment of the present invention. It is a vertical sectional view of the axial direction of the excavator shown in FIG. It is a horizontal sectional view of the tip lower part of the excavator shown in FIG.
- FIG. 3 is a side view taken along line AA in FIG. 2.
- FIG. 3 is a cross-sectional view taken along the line BB in FIG. 2.
- FIG. 3 is a cross-sectional view taken along the line CC in FIG. 2. It is a vertical sectional view showing a state where a tunnel is excavated using the excavator according to the first embodiment of the present invention.
- FIG. 13 is a side view taken along line AA in FIG. 12.
- FIG. 13 is a cross-sectional view taken along the line BB in FIG. 12. It is CC sectional view taken on the line in FIG.
- FIG. 1 is a perspective view showing the excavator 1 according to the present embodiment
- FIG. 2 is a vertical sectional view in the axial direction of the excavator 1 shown in FIG. 1
- FIG. 3 is a front end portion of the excavator 1 shown in FIG. It is a horizontal sectional view
- 4 is a side view taken along line AA in FIG. 2
- FIG. 5 is a sectional view taken along line BB in FIG. 2
- FIG. 6 is a sectional view taken along line CC in FIG.
- the excavation apparatus 1 includes a cylindrical shell 2, a excavation mechanism 4 provided at the tip of the shell 2 in the excavation progress direction (hereinafter referred to as the front), and excavation soil discharge.
- a mechanism 6 and a propulsion mechanism 8 for propelling the excavation mechanism 4 are provided.
- the shell 2 includes a first excavation shell 10, a second excavation shell 12, a front shell 14, and a rear shell 16 that are sequentially connected from the front. It consists of.
- the first excavation shell 10 includes an annular tip surface portion 10A forming a tip surface, a cylindrical front outer cylinder 10B extending rearward from the outer peripheral edge of the tip surface portion 10A, and a rear outer cylinder body 10B.
- a rear outer cylindrical body 10C connected to the end and formed in a cylindrical shape having a smaller diameter than the front outer cylindrical body 10B, a cylindrical inner cylindrical body 10D extending rearward from the inner peripheral edge of the distal end surface portion 10A, and front and rear It has a plurality of support members (not shown) provided so as to connect the outer cylinders 10B and 10C and the inner cylinder 10D.
- the second excavation shell 12, the front shell 14, and the rear shell 16 are each formed to have substantially the same diameter as the front outer cylinder 10 ⁇ / b> B of the first excavation shell 10.
- These shells 10, 12, 14, and 16 are each made of steel.
- the second end is formed such that a gap 10F is formed between the rear end of the inner cylinder 10D of the first excavation shell 10 and the front end of the inner cylinder 12D of the second excavation shell 12.
- the excavation part shell 12 terminates in front of the front end of the inner cylinder 12D.
- Inner cylinders 10D, 12D, 14D, 16D and outer cylinders 10B, 10C constituting the first excavation part shell 10, the second excavation part shell 12, the front shell 14, and the rear shell 16 , 12C, 14C, and 16C are arranged concentrically with a rotation shaft of the excavation mechanism 4 described in detail later, whereby the inner cylinders 10D, 12D, 14D, and 16D and the outer cylinders 10B, 10C, and 12C, An annular space is formed between 14C and 16C.
- the support member is made of a rod-shaped or plate-shaped steel material, and the number of the inner cylinders 10D, 12D, 14D, and 16D that can support the earth pressure acting on the outer cylinders 10B, 10C, 12C, 14C, and 16C,
- the inner cylinders 10D, 12D, 14D, and 16D and the outer cylinders 10B, 10C, 12C, 14C, and 16C are connected to each other radially at an appropriate interval in the circumferential direction and the axial direction.
- the propulsion mechanism 8 is accommodated in an annular space between the inner cylinders 10D, 12D, 14D, and 16D and the outer cylinders 10B, 10C, 12C, 14C, and 16C.
- the rear outer cylinder 10C of the first excavation shell 10 is housed inside the outer cylinder 12C of the second excavation shell 12 so that the first excavation shell 10 is The two excavation shells 12 are rotatably connected. Note that the rear outer cylindrical body 10 ⁇ / b> C of the first excavation part shell 10 can improve slippage by interposing a bearing or the like with the outer cylinder 12 ⁇ / b> C of the second excavation part shell 12.
- the second excavation part shell 12 is cut out at the rear end of the inner peripheral surface of the inner cylinder 12D and the rear end of the outer peripheral surface of the outer cylinder 12C.
- the front shell body 14 is cut out at the distal end portion of the outer peripheral surface of the inner cylindrical body 14D and the distal end portion of the inner peripheral surface of the outer cylindrical body 14C. And by accommodating the front-end
- the front shell 14 is cut out at the rear end of the inner peripheral surface of the inner cylinder 14D and the rear end of the outer peripheral surface of the outer cylinder 14C.
- the rear shell body 16 is cut out at the distal end portion of the outer peripheral surface of the inner cylindrical body 16D and the distal end portion of the inner peripheral surface of the outer cylindrical body 16C.
- the front shell 14 can slide in the axial direction with respect to the rear shell 16 by accommodating the tip of the rear shell 16 inside the rear end of the front shell 14. It is connected to the.
- a guide member that guides the sliding in the axial direction may be provided at the connection portion between the second excavation shell 12 and the front shell 14 and between the front shell 14 and the rear shell 16. .
- the excavation mechanism 4 includes a cutter unit 20 including a plurality of drill bits formed in the tip surface portion 10 ⁇ / b> A of the first excavation unit shell 10, and the first excavation unit shell 10.
- positioned in the 2nd excavation part shell 12 are provided.
- a plurality of openings 26 are formed in the distal end surface portion 10 ⁇ / b> A of the first excavation shell 10 at intervals in the circumferential direction.
- the space 10 ⁇ / b> E communicates through the opening 26.
- the cutter unit 20 is provided on the edge of the opening 26 formed in the tip surface portion 10A and the 13 pairs of roller bits 28 provided in the tip surface portion 10A of the first excavation shell 10 at intervals in the circumferential direction.
- a drill bit 30 is provided.
- a pin rack 32 is attached to the rear end of the first excavation shell 10.
- a motor 24 is disposed in the second excavation shell 12, and a speed reducer 22 is connected to the rotating shaft of the motor 24, and a pinion 22 ⁇ / b> A is attached to the speed reducer 22. It has been.
- the pinion 22A attached to the speed reducer 22 meshes with the pin rack 32 attached to the first excavation part shell 10.
- Each roller bit 28 is disposed at a different position in the radial direction. As a result, when the first excavation shell 10 rotates in the circumferential direction, the trajectory through which each roller bit 28 passes becomes a concentric circle that is substantially equally spaced in the radial direction, so that uniform excavation is performed regardless of the diameter. Can do.
- the drilling bit 30 is formed of a bit having a sharp tip, and the first excavation shell 10 is rotated to excavate the cutting surface cut by the roller bit 28 so as to be flat.
- the excavated soil discharge mechanism 6 is configured so that the space 10E in the first excavated shell 10 is divided into a plurality of chambers 10G in the circumferential direction.
- the jet nozzle is provided with a jet nozzle (not shown) provided to be exposed on the surface of the front end face portion 10A of the first excavation shell 1.
- Each plate member 34 is connected to the back surface of the tip surface portion 10A of the first excavation portion shell 10 where the drilling bit 30 is attached, and the first excavation portion shell is described later.
- the body 10 rotates, it is inclined in the circumferential direction so as to push the excavated soil in the space 10E backward.
- the closing plate 36 maximizes the gap 10F between the rear end of the inner cylinder 10D of the first excavation shell 10 and the front end of the inner cylinder 12D of the second excavation shell 12 in the circumferential direction.
- a part from the lower part to a predetermined height (in this embodiment, a part of about 120 ° on each side in the circumferential direction from the lowermost part) is provided to be closed.
- the propulsion mechanism 8 extends in the direction of excavation and is connected in series to a plurality of pairs of front and rear axial hydraulic jacks 40, 42 and axial hydraulic jacks 40, 42 adjacent in the circumferential direction.
- a plurality of front and rear radial hydraulic jacks 44, 46 disposed between the front and rear radial hydraulic jacks 44, 46, and a plurality of front and rear support plates 48, 50 respectively connected to the front ends of the front and rear radial hydraulic jacks 44, 46.
- an auxiliary propulsion jack 60 is an auxiliary propulsion jack 60.
- the front and rear axial hydraulic jacks 40, 42 of each pair are connected in series so as to extend in the excavation progress direction.
- the front and rear axial hydraulic jacks 40, 42 of each pair are provided at equal angular intervals in the circumferential direction of the shell body 2 so as to obtain a uniform driving force regardless of the angle.
- the front axial hydraulic jack 40 is accommodated between the inner cylinders 12D and 14D and the outer cylinders 12C and 14C from the second excavation part shell 12 to the front shell 14 and has a tip end. It is fixed to a connection plate 52 provided in the second excavation shell 12 and its rear end is fixed to a connection plate 54 provided in the front shell 14.
- the rear axial hydraulic jack 42 is accommodated between the inner cylinders 14D and 16D and the outer cylinders 14C and 16C from the front shell body 14 to the rear shell body 16, and the tip is the front shell body.
- the body 14 is fixed to the connection plate 54, and the rear end is fixed to the connection plate 56 provided on the rear shell 16.
- the front and rear axial hydraulic jacks 40 and 42 are connected in series via the connection plate 54.
- the forward radial hydraulic jack 44 is provided with a pair of two hydraulic jacks arranged in the circumferential direction with respect to a rectangular support plate 48.
- the paired radial hydraulic jacks 44 are accommodated in the second excavation shell 12 at intervals in the circumferential direction.
- the rearward radial hydraulic jack 46 includes four hydraulic jacks as a set for each of the pair of support plates 50 arranged in the front-rear direction. It is provided at a position corresponding to the four corners.
- the rear radial hydraulic jack 46 is accommodated in the rear shell 16 at intervals in the front-rear direction and the circumferential direction.
- Openings 12A and 16A are formed in the outer cylinders 12C and 16C of the second excavation shell 12 and the rear shell 16 at positions corresponding to the front and rear radial hydraulic jacks 44 and 46, respectively.
- One end of each of the front and rear radial hydraulic jacks 44, 46 is fixed to the second excavation shell 12 and the inner cylinders 12D, 16D of the rear shell 16, and the other end is an outer cylinder 12C.
- the openings 12A and 16A formed in 16C are connected to support plates 48 and 50 having substantially the same shape. With this configuration, the front and rear radial hydraulic jacks 44 and 46 extend, and the support plates 48 and 50 protrude toward the outer periphery.
- the axial hydraulic jacks 40 and 42 and the radial hydraulic jacks 44 and 46 are connected to a control device (not shown), and hydraulic pressure is supplied by the control device.
- FIG. 7 is a vertical sectional view showing tunnel excavation using the excavator 1 according to the present embodiment.
- the ground 62 is excavated in a cylindrical shape by the excavator 1, followed by excavating the remaining ground 64 in the center by a heavy machine 66. Build a tunnel with a circular cross section.
- This propulsion work is performed while rotating the cutter unit 20 of the excavating mechanism 4 about the axis of the excavating device 1 and discharging the excavated soil by the excavated soil discharging mechanism 6.
- the front radial hydraulic jack 44 is extended and the surrounding ground is pressed by the support plate 48. Then, the rear radial hydraulic jack 46 is retracted.
- the front and rear axial hydraulic jacks 40, 42 are contracted. Thereby, the front and rear shells 14 and 16 can be advanced. At this time, the front and rear shell bodies 14 and 16 can be easily extended by extending the auxiliary propulsion jack 60 in a state where the reaction force is applied to the segment attached to the inner peripheral wall of the tunnel that has been excavated. You can move forward.
- the excavating mechanism 4 can be advanced forward and the excavator 1 can be propelled.
- the cutter unit 20 is rotated to excavate the ground, and excavated soil generated by the excavation is sent to the rear of the apparatus. That is, the motor 24 of the excavation mechanism 4 is rotated in a state where the cutter unit 20 is pressed against the ground by the propulsion mechanism 8. The rotational force of the motor 24 is transmitted to the speed reducer 22 to amplify the torque, and the first excavation part shell 10 is rotated via the pinion 22A and the pin rack 32.
- the ground is first excavated into a cross-sectional saw shape by the roller bit 28 of the cutter unit 20, and the surface irregularities are cut by the drill bit 30. Thereby, the ground can be excavated in an annular shape.
- the excavated soil produced by excavating the ground with the cutter unit 20 is agitated with the water sprayed from the jet nozzle, and the fluidity is improved. Then, the excavated soil is accommodated in the chamber 10G in the first excavation shell 10 from the opening 26 formed in the front end surface portion 10A of the first excavation shell 10. Then, when the first excavation part shell 10 is rotated, the first excavation part shell 10 is sent backward by the plate member 34 attached in the first excavation part shell 10, and is discharged from the gap 10F to the space inside the apparatus.
- the gap 10F between the rear end of the inner cylinder 10D of the first excavation shell 10 and the front end of the inner cylinder 12D of the second excavation shell 12 is a circumferential direction.
- the part from the lowest part to a predetermined height is closed by the closing plate 36.
- excavated soil is not discharged from the chamber 10G positioned below the predetermined height, and the inside of the chamber 10G rotated to a predetermined height by the rotation of the first excavation shell 10
- the excavated soil falls on the closing plate 36. Thereby, it is possible to prevent the excavated soil carried to the gap 10F through the chamber 10G from accumulating downward and closing the gap 10F.
- a temporary protection plate is attached to the inner peripheral surface of the tunnel excavated in a cylindrical shape.
- the ground 64 inside the portion excavated in an annular shape by the excavator 1 is excavated to the rear position of the first excavation part shell 10.
- a heavy machine such as a breaker or a backhoe may be used.
- the excavated soil carried by the blades and the excavated soil generated by excavating the ground are loaded on a dump truck by a shaflower and carried out of the tunnel.
- the temporary protection plate is removed from the inner peripheral surface of the tunnel, and a lining such as a segment is applied.
- a tunnel with a circular cross section can be constructed.
- the plate material 34 is provided in the space 10E in the first excavation part shell 10 so as to be inclined in the circumferential direction toward the rear, the first excavation part shell 10 is provided. By rotating, the excavated soil accommodated in the chamber 10G in the first excavated shell 10 can be smoothly fed rearward by the plate material 34 and discharged from the gap 10F to the inner space of the apparatus 1.
- the excavated soil discharge mechanism 6 is larger than a conventional mud pipe. A space for discharging the excavated soil in the cross section can be secured, and a large amount of excavated soil can be discharged.
- the plate material 34 can carry out the excavation earth, and the excavation earth is separated from the power for rotating the cutter unit 20. It is not necessary to provide power for discharging the gas.
- the plate material 34 is provided in the space 10E in the first excavation part shell 10.
- the present invention is not limited to this.
- a spiral plate material may be provided.
- the lower part of the clearance gap 10F is closed by attaching the closing plate 36 to the inner cylinder 12D of the 2nd excavation part shell 12, and the space 10E and the space inside the apparatus 1 are made.
- the closing plate 36 was set as the structure connected only above the inner cylinder, it is not restricted to this, By extending the lower part of the inner cylinder 12D of the 2nd excavation part shell 12 toward the front, the lower part of the clearance gap 10F is made. It may be closed.
- the inner cylindrical body 10D and the outer cylindrical body 10B that constitute the first excavation shell 10 are rotated together with the tip surface portion 10A in which the cutter unit 20 is formed. Not limited to this, it is only necessary that at least the tip surface portion 10A is rotated and the plate member 34 is rotated together with it.
- FIG. 12 is a vertical cross-sectional view of the excavator of this embodiment
- FIG. 13 is a front view taken along the line AA in FIG. 12
- FIG. 14 is a cross-sectional view taken along the line BB in FIG. It is sectional drawing.
- the excavator 101 includes a cylindrical shell body 102, a drilling mechanism 4 provided at the tip of the shell body 102 in the excavation progress direction (hereinafter referred to as the front), a drilling soil discharge mechanism 106, and And a propulsion mechanism 8 for propelling the excavation mechanism 4.
- the structure of the excavation mechanism 4 in the excavation apparatus of this embodiment is the same as that of 1st Embodiment.
- the configuration of the propulsion mechanism in the present embodiment is the same as that of the first embodiment, although the number of radial hydraulic jacks is small.
- the shell 102 includes a first excavation shell 10, a second excavation shell 12, a front shell 14, and a rear shell 16 that are sequentially connected from the front. It consists of.
- the front end of the inner cylinder 12E that constitutes the second excavation shell 12 has advanced to the rear end of the inner cylinder 10D that constitutes the first excavation shell 10. No gap is formed between the cylinders 10D and 12E.
- the inner cylinders 10D, 12E, and 14D constituting the first excavation part shell 10, the second excavation part shell 12, the front shell 14, and the rear shell 16 are provided.
- 16D is configured to have a smaller diameter than the first embodiment, and a wider ring than the first embodiment between the inner cylinders 10D, 12E, 14D, 16D and the outer cylinders 10B, 12C, 14C, 16C. A space is formed.
- all members constituting the excavation mechanism 4 and the propulsion mechanism 8 disposed in the shell 2 are disposed on the outer peripheral side of the space in the shell 2,
- the members constituting each mechanism are not arranged on the circumferential side, and an annular inner space 108 used when discharging excavated soil is defined on the inner circumferential side of the shell body 2.
- the second excavation shell 12 is divided into these spaces.
- a cylindrical intermediate cylinder 12F is provided. Further, at the tip of the second excavation shell 12, the space between the intermediate cylinder 12 ⁇ / b> F and the outer cylinder 12 ⁇ / b> C is closed with a closing plate 12 ⁇ / b> G.
- the intermediate cylinder 12F is provided only in the second excavation part shell 12, but it may also be provided in the front shell 14 and the rear shell 16.
- the space 10E in the first excavation part shell 10 communicates with the inner space 108 in the shell 2 in the shell 2.
- a plurality of excavated soil discharge mechanisms 106 are provided in the space 10E inside the first excavation unit shell 10 so as to divide the space 10E in the first excavation unit shell 10 into a plurality of chambers 10G in the circumferential direction.
- a jet nozzle (not shown) provided to be exposed on the surface of the front end face portion 10A of one excavation shell 10 and a conveying means 112 comprising, for example, a belt conveyor, provided in a lower portion in the inner space 108. It is equipped with.
- Each plate member 34 is connected to the back surface of the portion where the drilling bit 30 of the tip surface portion 10A of the first excavation shell 10 is attached, and the first excavation shell is directed rearward. 10 are provided so as to be inclined in the circumferential direction. Further, the rear inner peripheral side of the plate member 134 is inclined so as to connect the front end of the intermediate cylinder 12F and the rear end of the inner cylinder 10D of the first excavation part shell 10.
- the closing plate 136 has a gap 110 ⁇ / b> F between the tip of the intermediate cylinder 12 ⁇ / b> F and the rear end of the inner cylinder 10 ⁇ / b> D of the first excavation shell 10 in the circumferential direction. It is provided so as to close a portion from the lowermost portion to a predetermined height (in this embodiment, a portion of about 120 ° on each side in the circumferential direction from the lowermost portion).
- the cutter unit 20 excavates the ground.
- the excavated soil produced by excavating the ground with the cutter unit 20 is agitated with the water sprayed from the jet nozzle, and the fluidity is improved.
- the excavated soil is accommodated in the chamber 10G in the first excavation shell 10 from the opening 26 formed in the front end surface portion 10A of the first excavation shell 10.
- the closing plate 136 since the portion from the lowermost part to the predetermined height is closed in the circumferential direction by the closing plate 136, the inside of the chamber 10G rotated to the predetermined height by rotating the first excavation shell 10 Only the excavated soil falls to the inner space 108. Then, due to the closing plate 136, the rear inner peripheral side of the plate member 34 reaches a predetermined height of the gap 110 ⁇ / b> F between the tip of the intermediate cylinder 12 ⁇ / b> F and the rear end of the inner cylinder 10 ⁇ / b> D of the first excavation shell 10. Since this portion is closed, it is possible to prevent the excavated soil that has fallen from blocking the gap 10F.
- the excavated soil that has fallen into the inner space 108 is conveyed to the rear of the apparatus by the conveying means 112 provided in the lower portion of the inner space 108.
- the plate material 134 is provided in the space 10E in the first excavation shell 10 so as to incline in the rotation direction of the first excavation shell 10 toward the rear. Therefore, when the plate material 134 rotates together with the first excavation part shell 10, the excavated soil accommodated in the chamber 10G in the first excavation part shell 10 can be smoothly sent to the conveying means 112. it can.
- the excavated soil discharged from the chamber 10G in the first excavation part shell 10 to the inside of the apparatus through the gap 110F accumulates in the lower direction and becomes a gap. It is possible to prevent clogging of 110F and prevent clogging of the excavated soil discharge mechanism 6.
- the excavating soil discharging mechanism 6 is configured to provide the plate material 134 so as to incline in the rotation direction of the first excavating part shell 10 toward the rear in the first excavating part shell 10, Since the excavated soil shell 10 is rotated, the excavated soil can be conveyed rearward by the plate material 134, so that a space for discharging the excavated soil having a large cross section can be secured, and a large amount of excavated soil can be discharged. it can.
- plate material 134 can carry out excavation soil, and power is provided separately from the power for rotating the cutter part 20. FIG. There is no need.
- a spiral plate material may be provided instead of the plate material 134, and only the tip surface portion 10A and the plate material 134 may be rotated.
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Abstract
Description
図1は、本実施形態による掘削装置1を示す斜視図、図2は、図1に示す掘削装置1の軸方向の鉛直断面図、図3は、図1に示す掘削装置1の先端部の水平断面図である。また、図4は、図2におけるA-A視側面図、図5は、図2におけるB-B視断面図、図6は、図2におけるC-C視断面図である。
なお、これら軸方向油圧ジャッキ40、42及び径方向油圧ジャッキ44、46は、制御装置(図示せず)に接続されており、制御装置により油圧が供給される。
図7は、本実施形態による掘削装置1を用いたトンネルの掘削を示す鉛直断面図である。同図に示すように、本実施形態では、先行して、掘削装置1により円筒状に地盤62を掘削し、後行して、残された中心部の地盤64を重機66によって掘削することにより円形断面のトンネルを構築する。
そして、ブレードにより運ばれた掘削土及び地盤を掘削して発生した掘削土を、シャフローダによりダンプトラックに積載し、トンネル外部に搬出する。
なお、以下の説明で、第一実施形態と同様の構成要素については、同じ番号を付して説明を省略する。
第1実施形態と同様に、第1の掘削部殻体10が回転すると、カッタ部20が地盤を掘削する。カッタ部20により地盤を掘削することで生じた掘削土は、ジェットノズルから噴射される水と攪拌されて、流動性が向上される。そして、掘削土は、第1の掘削部殻体10の先端面部10Aに形成された開口26から第1の掘削部殻体10内の室10Gに収容される。
2、102 殻体
4 掘削機構
6、104 掘削土排出機構
8 推進機構
10 第1の掘削部殻体
10A 先端面部
10B 前方外筒体
10C 後方外筒体
10E 空間
10F、110F 隙間
10G 室
12 第2の掘削部殻体
12C、14C、16C 外筒体
10D、12D、14D,16D、12E 内筒体
20 カッタ部
26 開口
28 ローラービット
30 削孔ビット
34、134 板材
36、136 閉鎖プレート
108 内側空間
112 搬送手段
Claims (3)
- 地盤を円環状に掘削するための円筒状のトンネル掘削装置であって、
該トンネル掘削装置の掘削進行方向の先端面に設けられ、先端面に地盤を掘削するためのビットを備える回転駆動可能な円環状のカッタ部を含む掘削機構と、
円筒形状の外筒体と、前記外筒体と同心状に配置され、前記外筒体よりも小径の円筒形状の内筒体とを有し、前記先端面の後方に接続された殻体と、
前記掘削機構を掘削進行方向に推進させる推進機構と、
前記掘削機構により掘削された掘削土を、前記先端面に形成された開口から、前記トンネル掘削装置の前方に内筒体と外筒体との間に形成された収容空間に収容し、前記内筒体の前記収容空間の後部に形成された隙間から該トンネル掘削装置の内側空間へ排出する掘削土排出機構と、を備え、
前記掘削土排出機構は、前記収容空間内に後方方向に向かって周方向に傾斜するように設けられた板材を備え、該板材は前記カッタ部とともに回転し、これにより前記収容空間内に収容された掘削土が前記収容空間の後方に形成された隙間へ送られる、
ことを特徴とするトンネル掘削装置。 - 前記殻体は、前記掘削進行方向先方側から順に設けられた、第1の殻体と、第2の殻体と、を含み、
前記第1の殻体は前記カッタ部とともに前記第2の殻体に対して回転し、
前記収容空間は前記第1の殻体内に形成され、
前記隙間は、前記第1の殻体の内筒体の後縁と、前記第2の殻体の内筒体の前縁との間に形成されている、請求項1に記載されたトンネル掘削装置。 - 前記第1の殻体の内筒体の後縁と、前記第2の殻体の内筒体の前縁に設けられた前記隙間の所定高さよりも下方部分を閉鎖する閉鎖プレートを備え、これにより、前記隙間は、所定高さよりも上方において前記内筒体の内側に開口している請求項2に記載されたトンネルの掘削装置。
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BR112013025417A BR112013025417A2 (pt) | 2011-12-09 | 2012-08-10 | aparelho de escavação de túnel para escavar terra em um formato cilíndrico |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2014005677A (ja) * | 2012-06-26 | 2014-01-16 | Kabuki Construction Co Ltd | トンネル掘削システム |
JP5702500B1 (ja) * | 2014-09-09 | 2015-04-15 | 株木建設株式会社 | トンネル掘削装置 |
CN105626090A (zh) * | 2014-10-31 | 2016-06-01 | 徐州徐工铁路装备有限公司 | 多功能操作臂及地下隧道挖掘设备 |
CN113622936A (zh) * | 2021-08-31 | 2021-11-09 | 北京首尔工程技术有限公司 | 一种新的隧道掘进方法及掘进装置 |
CN114033415A (zh) * | 2021-11-12 | 2022-02-11 | 济南华世起科技有限公司 | 一种环切式掘进设备 |
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KR101636720B1 (ko) * | 2014-12-11 | 2016-07-06 | 김종화 | 전후진 이동가능 굴착장치 |
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JPS63217098A (ja) * | 1987-02-28 | 1988-09-09 | 株式会社錢高組 | 地中外殻体の築造装置 |
JPH04238997A (ja) * | 1991-01-12 | 1992-08-26 | Okumura Corp | 計画トンネルの外周リング状覆工装置 |
JPH04366300A (ja) * | 1991-06-13 | 1992-12-18 | Shimizu Corp | トンネルの施工方法 |
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JPS63217098A (ja) * | 1987-02-28 | 1988-09-09 | 株式会社錢高組 | 地中外殻体の築造装置 |
JPH04238997A (ja) * | 1991-01-12 | 1992-08-26 | Okumura Corp | 計画トンネルの外周リング状覆工装置 |
JPH04366300A (ja) * | 1991-06-13 | 1992-12-18 | Shimizu Corp | トンネルの施工方法 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2014005677A (ja) * | 2012-06-26 | 2014-01-16 | Kabuki Construction Co Ltd | トンネル掘削システム |
JP5702500B1 (ja) * | 2014-09-09 | 2015-04-15 | 株木建設株式会社 | トンネル掘削装置 |
CN105626090A (zh) * | 2014-10-31 | 2016-06-01 | 徐州徐工铁路装备有限公司 | 多功能操作臂及地下隧道挖掘设备 |
CN105626090B (zh) * | 2014-10-31 | 2018-06-19 | 徐州徐工铁路装备有限公司 | 多功能操作臂及地下隧道挖掘设备 |
CN113622936A (zh) * | 2021-08-31 | 2021-11-09 | 北京首尔工程技术有限公司 | 一种新的隧道掘进方法及掘进装置 |
CN114033415A (zh) * | 2021-11-12 | 2022-02-11 | 济南华世起科技有限公司 | 一种环切式掘进设备 |
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BR112013025417A2 (pt) | 2016-12-27 |
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