JP5363902B2 - Rectangular shield machine and its cutter recovery method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rectangular shield machine and a cutter recovery method for recovering a cutter onto a pit mouth side without dismantling the cutter. <P>SOLUTION: This rectangular shield machine 1 includes an outer cylinder 6 having a rectangular cross section, an inner cylinder 7 being detachably stored in the outer cylinder 6 and having a circular cross section, an inner side bulkhead 8 provided at one end of the inner cylinder 7 and blocking the inner cylinder 7, a cutter device 9 mounted on the inner side bulkhead 8, and an outer side bulkhead 10 provided at one end of the outer cylinder 6 and blocking a section between the outer cylinder 6 and the inner cylinder 7. The cutter device 9 includes a cutter body 17 having extensible/contractible cutter spokes 18, 19 and a cutter driving part 28 provided divisibly in the cutter body 17 and on the inner side bulkhead 8. A manhole with lid 39 enabling the cutter spokes 18, 19 to pass into a rear part by cutting a part of the outer side bulkhead 10 facing a corner part 16 of the outer cylinder 6 is formed in the outer side bulkhead 10. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a rectangular shield machine capable of recovering a cutter to the wellhead side and a cutter recovery method thereof.

  When the main components such as the cutter device, direction control device and earth removing device of the shield machine are collected after the shield machine reaches the position where there is no reaching shaft by the propulsion method, etc., these parts cannot be collected from the arrival side. For this reason, most parts other than the outer cylinder of the shield machine are dismantled in the pit and pulled back to the pit side.

  The most problematic part is the cutter. When considering the recovery of the cutter, first, consider a method of pulling back the cutter without disassembling it as much as possible. If the disassembly of the cutter is inevitable, consider a disassembly method that can minimize the disassembly of the cutter.

  As a past example, there is one in which a cutter is pulled out from a partition wall of a shield machine having a circular cross section as described in Patent Document 1. In this case, the shield body is formed in advance so that the shield body can be separated into the outer cylinder and the inner cylinder, and when collecting the main components, the outer cylinder and the inner cylinder are separated and the cutter is retracted, The cutter is pulled out backwards.

JP 2006-283546 A

  However, a shield machine having a rectangular cross section (hereinafter referred to as a rectangular shield machine) has a larger cutter than a shield machine having a circular cross section in order to cut a rectangular cross section, and the inner cylinder has a sealing structure between the inner cylinder and the outer cylinder. Since it is necessary to form the cutter smaller than the outer cylinder, it is not possible to make the cutter smaller than the outer diameter of the inner cylinder even if the cutter is formed to be extendable. Therefore, the above-described construction method has a problem that the cutter cannot be recovered without dismantling, and there is no construction method that can be recovered at the wellhead side without disassembling the cutter.

  Accordingly, an object of the present invention is to solve the above-mentioned problems and provide a rectangular shield machine that can be recovered to the wellhead side without disassembling the cutter and a cutter recovery method thereof.

  In order to solve the above-mentioned problems, the invention according to claim 1 is provided with an outer cylinder formed in a rectangular cross section, an inner cylinder having a circular section detachably accommodated in the outer cylinder, and one end of the inner cylinder. A rectangular shield machine comprising an inner partition wall that closes the inner cylinder, a cutter device that is provided in the inner partition wall to excavate natural ground, and an outer partition wall that is provided at one end of the outer cylinder and blocks between the outer cylinder and the inner cylinder The cutter device is disposed in front of the inner partition wall and has a cutter main body having a retractable cutter spoke extending radially outward of the inner cylinder, and the cutter main body is detachably provided on the inner side of the cutter body. A lid that is provided on the partition wall and that drives the cutter body, and the outer partition wall facing the corner portion of the outer cylinder can cut the part of the outer partition wall to allow the cutter pork to pass rearward. With a manhole It is intended.

  According to a second aspect of the present invention, the inner cylinder is coupled to the outer cylinder via a pin that can be extracted inward.

  According to a third aspect of the present invention, the rectangular shield machine according to the first aspect is driven from the wellhead to reach a predetermined position, and thereafter the cutter device is recovered from the rectangular shield machine to the wellhead side. In the recovery method, when the rectangular shield machine reaches the predetermined position, the cutter body is stopped so that the cutter pork stops at a position facing the manhole with lid, and the cutter pork is degenerated, Remove the lid of the manhole with lid, divide the cutter main body and the cutter drive unit, move the cutter drive unit to the wellhead side together with the inner cylinder, and collect the opening. A part of the outer bulkhead is cut so as to connect the manhole with a lid, and the cutter pork is inserted into the manhole with a lid connected to the opening. It is intended to recover the body.

  According to a fourth aspect of the present invention, when the cutter main body is stopped and the cutter pork is retracted, the cutter main body is temporarily fixed to the outer cylinder, and a part of the outer partition wall is cut to the outer side. When the opening on the inner peripheral side of the partition wall and the manhole with the lid are connected, the temporary fixing of the cutter body is released.

  According to a fifth aspect of the present invention, the outer partition wall has a cylindrical flange front end portion for supporting the inner cylinder in a watertight manner, and when the outer partition wall is cut, a gap between the manhole with the lid and the opening is formed. The front end portion of the flange portion located at the position is also cut and removed.

  According to a sixth aspect of the present invention, the inner cylinder is coupled to the outer cylinder via a pin that can be extracted inward, and when the inner cylinder is recovered, the pin is extracted inwardly to collect the outer cylinder. And the coupling of the inner cylinder is released.

  According to the present invention, the cutter can be collected on the wellhead side without dismantling.

FIG. 1 is a sectional side view of a rectangular shield machine. FIG. 2 is a front view of the rectangular shield machine. FIG. 3 is a rear view of the rectangular shield machine. FIG. 4 is an enlarged view of a main part of FIG. FIG. 5 is a view of the outer cylinder of FIG. 6 is a view of the outer cylinder of FIG. FIG. 7 is an explanatory view showing a first step of cutter recovery. FIG. 8 is an explanatory diagram showing a second step of cutter recovery. FIG. 9 is an explanatory view showing a third step of cutter recovery. FIG. 10 is an explanatory view showing a fourth step of cutter recovery. FIG. 11 is an explanatory view showing the fifth step of cutter recovery. FIG. 12 is an explanatory view showing a sixth step of cutter recovery. FIG. 13 is a schematic explanatory diagram of a rectangular shield machine.

  Embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 13, the rectangular shield machine 1 is pushed by a pushing device 3 provided in the start shaft 2, and is the head of a row of propulsion steel shells 4 that are sequentially added in the start shaft 2. It excavates the natural ground 5 located in the forward direction in the propulsion direction.

  As shown in FIGS. 1 and 2, the rectangular shield machine 1 includes an outer cylinder 6 having a rectangular cross section, an inner cylinder 7 having a circular section that is detachably accommodated in the outer cylinder 6, and a front end of the inner cylinder 7. Between the outer cylinder 6 and the inner cylinder 7 provided at the front end of the outer cylinder 6, the inner partition wall 8 provided to the inner cylinder 7, the cutter device 9 provided on the inner partition wall 8 for excavating the front ground 5. And an earth removing device 11 detachably provided on the inner partition wall 8.

  The outer cylinder 6 includes a hood part 12 disposed at the foremost part, a body part 13 disposed at the intermediate part and connected to the hood part 12, and an inner cylinder 7 and a direction control jack disposed at the rear end part. 14 and a tail portion 15 connected to bendable through the tail portion 15.

  A plurality of the hood part 12, the body part 13 and the tail part 15 are provided at intervals in the circumferential direction on the skin plates 12a, 13a and 15a forming the outer shell and the inner peripheral surfaces of the skin plates 12a, 13a and 15a. Ribs 12b, 13b, 15b extending inward in the radial direction and extending in the axial direction, and flange portions provided on the ribs 12b, 13b, 15b for supporting the inner cylinder 7 in a watertight manner and guiding the inner cylinder 7 so as to be movable rearward. 12c, 13c, 15c.

  As shown in FIGS. 3, 4, and 6, the hood portion 12, the body portion 13, and the tail portion 15 have the flange portions 12 c, 13 c, and 15 c facing the corner portion 16 of the outer cylinder 6 outward in the radial direction. It is bent so as to protrude so that it does not interfere with the cutter spokes 18 and 19 when the cutter body 17 described later is recovered. In particular, as shown in FIG. 5, the front end portion of the flange portion 12 c of the hood portion 12, the rear end portion of the flange portion 13 c of the body portion 13, and the front end portion of the flange portion 15 c of the tail portion 15 are formed in a cross-sectional ring shape. It is possible to stop the water with a seal 20 described later between the inner cylinder 7. In particular, the front end portion of the flange portion 12 c of the hood portion 12 constitutes a part of the outer partition wall 10.

  As shown in FIGS. 1, 4, and 10, the inner cylinder 7 is directed to the front inner cylinder 21 accommodated in the hood portion 12, the middle inner cylinder 22 accommodated in the body portion 13, and the middle inner cylinder 22. The rear inner cylinder 23 is connected via the control jack 14 and accommodated in the tail portion 15. On the outer periphery of each of the front inner cylinder 21, the middle inner cylinder 22, and the rear inner cylinder 23, ring-shaped seals 20 that are in contact with the flange portions 12c, 13c, and 15c are provided. The rear inner cylinder 23 has a front end 23 a inserted in the middle inner cylinder 22, and a seal 24 is provided between the front end 23 a and the middle inner cylinder 22. Further, the outer cylinder 6 and the inner cylinder 7 are detachably coupled via a pin 25 that can be extracted inward, and the thrust transmitted to the outer cylinder 6 is transmitted to the inner cylinder 7 via the pin 25. ing. As shown in FIG. 4, pin receivers 26 and 27 for inserting the same pin 25 are provided in the middle inner cylinder 22 and the body portion 13, respectively. Each of the pin receivers 26 and 27 is formed by forming a hole in the metal block, and the hole is formed so as to continuously squeeze from the radially inner side to the outer side of the inner cylinder 7. The pin 25 is formed in a tapered shape, and is inserted into the pin receivers 26 and 27 from the radially inner side of the inner cylinder 7 so that the pin receiver 26 on the middle inner cylinder 22 side and the pin receiver 27 on the body part 13 side It is designed to be inserted across. Also, the rear inner cylinder 23 and the tail part 15 are provided with similar pin receivers 26 and 27, and the rear inner cylinder 23 and the tail part 15 are detachable by inserting the pins 25 into the pin receivers 26 and 27. To be combined.

  As shown in FIGS. 1 and 2, the cutter device 9 is divided into a cutter body 17 disposed outside the inner cylinder 7 (in front of the inner partition wall 8), and the cutter body 17 via bolts (not shown). The cutter drive unit 28 is provided on the inner partition wall 8 and is provided on the inner partition wall 8 for driving the cutter body 17. The cutter body 17 includes a center block 29 that can be divided into the drive shaft 36 of the cutter drive unit 28, a pair of fixed spokes (cutting spokes) 18 that are radially attached to the center block 29 at intervals of 180 degrees, and a fixed spoke. 18, a copy cutter 31 provided so as to be able to protrude and retract outward in the radial direction of the inner cylinder 7, a guide cylinder 32 provided in the center block 29 so as to intersect the fixed spoke 18, and an inner cylinder in the guide cylinder 32. 7 is provided with an expansion / contraction spoke (cutting spoke) 19 slidably provided radially outward, and is formed in a substantially cross shape when viewed from the front. A pair of guide cylinders 32 are provided on the center block 29 so as to extend in the diameter direction. The telescopic spoke 19 is slidably provided at one end of one guide cylinder 32 and slidably provided at the other end of the other guide cylinder 32. A cutter bit 34 is provided on the face side of the fixed spoke 18 and the face side of the extensible spoke 19. The cutter drive unit 28 includes a bearing unit 35 provided on the inner partition wall 8, a drive shaft 36 rotatably supported by the bearing unit 35, a gear 37 provided on the drive shaft 36, and a motor 38 that drives the gear 37. Consists of.

  The outer partition 10 is water-tightly welded to the front end of the skin plate 12a and the front end of the flange portion 12c. Further, the outer partition wall 10 facing each corner portion 16 of the outer cylinder 6 is formed with a manhole 39 with a lid through which a portion of the cut pieces 18 and 19 can be passed by cutting a part thereof. The manhole 39 with lid is normally closed with a removable lid 40. In particular, the manhole 39 with a lid is formed in an arc shape so that the outer peripheral edge 41 facing the flange portion 12c is along the front end portion of the flange portion 12c, and is formed inside the flange portion 12c when the inner cylinder 7 is recovered. It can be easily connected to the opening 42.

  Next, the cutter collection method of the rectangular shield machine 1 will be described.

  As shown in FIG. 13, when the rectangular shield machine 1 is pushed and propelled by the main pushing device 3 and the rectangular shield machine 1 reaches a predetermined position, as shown in FIG. The cutter body 17 is stopped so as to stop at the position facing the attached manhole 39, and the propulsion of the rectangular shield machine 1 is finished.

  Thereafter, as shown in FIG. 8, the ground is improved by injecting a water-stopping agent into the ground 5 around the face 43 and the outer cylinder 6, and the temporary cutter fixing material 44 between the fixed spokes 18 and the hood portion 12. And a temporary cutter fixing member 44 is provided between each expansion / contraction spoke 19 and the hood portion 12 to temporarily fix the fixed spoke 18 and the expansion / contraction spoke 19. The earth removing device 11 is removed from the inner partition wall 8 and moved to the wellhead 45 side for recovery.

  As shown in FIG. 9, each pin 25 is pulled out radially inward of the inner cylinder 7. Since the pin 25 is formed in a tapered shape, it can be easily pulled out. Thereby, the coupling | bonding of the inner cylinder 7 with respect to the outer cylinder 6 is cancelled | released.

  As shown in FIG. 10, the cutter main body 17 and the cutter driving unit 28 are divided, and the front inner cylinder 21 and the middle inner cylinder 22 are divided, and the middle inner cylinder 22 and the rear inner cylinder 23 together with the directional control jack 14 are on the wellhead 45 side. Then, the front inner cylinder 21 is moved to the wellhead 45 side together with the cutter driving unit 28 and collected. Since the cutter body 17 is fixed to the hood portion 12 via the temporary cutter fixing member 44, it does not move while standing.

  Thereafter, as shown in FIG. 11, the outer partition wall 10 (including the front end portion of the flange portion 12 c) between the central opening 42 of the outer cylinder 6 and the manhole 39 with the lid is cut off, and the corner portion 16 of the body portion 13. The rear end portion of the flange portion 13c that faces the flange portion 15c is cut off, and the front end portion of the flange portion 15c that faces the corner portion 16 of the tail portion 15 is cut away to secure a moving path of the cutter body 17, as shown in FIG. The cutter body 17 is supported by a transport device such as a cart (not shown), the cutter temporary fixing material 44 is removed, a carrying base 46 is laid in the outer cylinder 6, and the cutter body 17 is moved to the wellhead 45 side and collected. To do. At this time, since a hole corresponding to the shape of the cutter body 17 is formed behind the cutter body 17, the cutter body 17 can be easily collected.

  As described above, the rectangular shield machine 1 includes an outer cylinder 6 having a rectangular cross section, an inner cylinder 7 having a circular section that is detachably accommodated in the outer cylinder 6, and an inner cylinder provided at one end of the inner cylinder 7. 7, an inner partition wall 8 provided on the inner partition wall 8, a cutter device 9 for excavating the natural ground 5, and an outer partition wall 10 provided at one end of the outer tube 6 and blocking between the outer tube 6 and the inner tube 7. The cutter device 9 is disposed in front of the inner partition wall 8 and has a cutter body 17 having retractable cutter spokes 18 and 19 that extend radially outward of the inner cylinder 7, and a cutter body 17 that can be divided into the cutter body 17. A cutter driving unit 28 provided on the inner partition wall 8 for driving the cutter body 17 is provided, and the outer partition wall 10 facing the corner portion 16 of the outer cylinder 6 is cut back to bring the cutter porks 18 and 19 to the rear. Manhole 39 with a lid that can be passed through Because we shall be made, it can be recovered to the wellhead 45 side without be rectangular shield machine 1 dismantling the cutter body 17.

  Since the inner cylinder 7 is connected to the outer cylinder 6 via a pin 25 that can be pulled out inward, the coupling of the inner cylinder 7 to the outer cylinder 6 can be easily released by pulling out the pin 25 from the inside of the machine. The inner cylinder 7 can be quickly collected, and the moving path of the cutter body 17 can be quickly secured.

  When the rectangular shield machine 1 reaches a predetermined position, the cutter main body 17 is stopped so that the cutter spokes 18 and 19 stop at the position facing the manhole 39 with the lid, and the cutter porks 18 and 19 are retracted, and the manhole 39 with the lid is attached. The lid 40 is removed, the cutter body 17 and the cutter drive unit 28 are divided, and the cutter drive unit 28 is moved together with the inner cylinder 7 to the wellhead 45 side to be recovered. A part of the outer partition wall 10 is cut so as to connect with the hole of the manhole 39 with a hole, and the cutter body 17 is recovered in order to collect the cutter body 17 through the cutter porks 18 and 19 into the hole of the manhole 39 with the lid connected to the opening 42. It can be easily recovered to the wellhead 45 side without dismantling.

  When the cutter body 17 is stopped and the cutter spokes 18 and 19 are retracted, the cutter body 17 is temporarily fixed to the outer cylinder 6, and a part of the outer partition wall 10 is cut so that the inner peripheral side of the outer partition wall 10 is cut. When the opening 42 and the hole of the manhole 39 with the lid are connected, in order to release the temporary fixing of the cutter body 17, the cutter drive unit 28 is separated from the cutter body 17 until the cutter body 17 is supported by the transport device. It is possible to prevent the posture of the cutter body 17 from changing in the meantime, and the cutter body 17 can be stably recovered.

  The outer partition 10 has a front end portion of a cylindrical flange portion 12c for supporting the inner cylinder 7 in a watertight manner. When the outer partition 10 is cut, a gap between the central opening 42 of the outer cylinder 6 and the manhole 39 with a lid is provided. Since the front end portion of the flange portion 12c located at the top is also cut and removed, the water can be reliably stopped between the outer partition wall 10 and the inner partition wall 8 at the time of propulsion, and the cutter body 17 can be recovered without disassembly at the time of cutter recovery. .

  In addition, although the rectangular shield machine 1 demonstrated what was used by a propulsion construction method, it is not restricted to this. The rectangular shield machine may be a shield machine with a rectangular cross section that digs by taking a reaction force from an existing segment while assembling the segments in the machine. In this case, an erector for assembling the segment and a shield jack for taking a reaction force from the segment are preferably provided in the inner cylinder 7 in advance and can be collected together with the inner cylinder 7.

  The cutter body 17 is formed in a substantially cross shape when viewed from the front, but may be a single character when viewed from the front.

DESCRIPTION OF SYMBOLS 1 Rectangular shield machine 5 Ground 6 Outer cylinder 7 Inner cylinder 8 Inner partition wall 9 Cutter apparatus 10 Outer partition wall 12c Flange part 16 Corner part 17 Cutter main body 18 Cutter pork 19 Cutter pork 25 Pin 28 Cutter drive part 39 Manhole 40 with a lid Lid 42 Opening 45 wellhead

Claims (6)

  An outer cylinder having a rectangular cross section; an inner cylinder having a circular cross section that is detachably accommodated in the outer cylinder; an inner partition provided at one end of the inner cylinder to close the inner cylinder; and provided on the inner partition. A rectangular shield machine comprising a cutter device for excavating natural ground, and an outer partition wall provided at one end of the outer cylinder and closing the space between the outer cylinder and the inner cylinder, wherein the cutter device is in front of the inner partition wall A cutter body having a retractable cutter spoke that is arranged and extends radially outward of the inner cylinder; and a cutter driving unit that is provided in the cutter body and that is detachably provided to drive the cutter body. A rectangular shield machine characterized in that the outer partition wall facing the corner portion of the outer cylinder is formed with a manhole with a lid through which a part of the outer porcelain can be passed by cutting a part of the outer partition wall.   The rectangular shield machine according to claim 1, wherein the inner cylinder is coupled to the outer cylinder via a pin that can be extracted inwardly.   A method for recovering a cutter of a rectangular shield machine, wherein the rectangular shield machine according to claim 1 is propelled from a wellhead to reach a predetermined position and then the cutter device is recovered from the rectangular shield machine to the wellhead side. When the shield machine reaches the predetermined position, the cutter body is stopped so that the cutter pork stops at the position facing the manhole with lid, and the cutter pork is degenerated, and the lid of the manhole with lid is removed. The cutter main body and the cutter driving unit are divided, and the cutter driving unit is moved to the wellhead side along with the inner cylinder and collected, and the opening on the inner peripheral side of the outer partition wall and the manhole with the lid are connected. Cutting a part of the outer partition wall and collecting the cutter body through the cutter pork in a manhole with a lid connected to the opening; Cutter recovery method of a rectangular shield machine according to symptoms.   When the cutter main body is stopped and the cutter pork is retracted, the cutter main body is temporarily fixed to the outer cylinder, and a part of the outer partition wall is cut to form an opening on the inner peripheral side of the outer partition wall. 4. The cutter recovery method for a rectangular shield machine according to claim 3, wherein the temporary fixing of the cutter body is released when the manhole with the lid is connected.   The outer partition has a cylindrical flange front end for watertight support of the inner cylinder, and the flange front end located between the manhole with lid and the opening when the outer partition is cut. The method for recovering a cutter of a rectangular shield machine according to claim 3 or 4, wherein the cutter is also cut and removed.   The inner cylinder is coupled to the outer cylinder via a pin that can be pulled out inward, and when the inner cylinder is recovered, the pin is pulled inward to release the coupling between the outer cylinder and the inner cylinder. The method for recovering a cutter of a rectangular shield machine according to any one of claims 3 to 5.

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