Articulated shield tunneling machine

Abstract

When using a curved tunneling machine equipped with a soil-removing conveyor that plays a role in pulling subsequent equipment, the misalignment of the soil-removing conveyor can be easily corrected. [Solution] A jack 20 for correcting the misalignment of the screw conveyor 6s is provided between the inner wall surface of the rear section 3b of the articulated earth pressure balance shield tunneling machine 1 and the screw conveyor 6s. One end of the jack 20 is mechanically connected to the inner wall surface of the rear section 3b, and the other end of the jack 20 is mechanically connected to the upper surface of the screw conveyor 6s.

Description

Technical Field

[0001] The present invention relates to a middle-bending shield tunneling machine, and for example, relates to a technology for correcting the position of a soil discharging screw conveyor during middle-bending operation of a middle-bending shield tunneling machine. Background Art

[0002] In recent years, middle-bending shield tunneling machines have been widely used as shield tunneling machines that facilitate curved construction of shield tunnels. The middle-bending shield tunneling machine engages the rear end portion of the front body and the front end portion of the rear body via a bendable overlapping sliding portion, so that during curved construction, the front body can be bent at a desired angle relative to the rear body to excavate along a curved path.

[0003] During curved construction with this middle-bending shield tunneling machine, if the front end of the soil discharging screw conveyor that discharges sediment from the chamber to the outside is fixed to the partition wall behind the chamber, the rear end of the soil discharging screw conveyor will shift left and right relative to the central axis of the middle-bending shield tunneling machine in plan view, and may come into contact with the working deck, erector device or other equipment in the rear body. Therefore, to avoid this, it is necessary to correct the positional deviation of the soil discharging screw conveyor.

[0004] The technology for correcting positional deviation of the soil discharging screw conveyor of a middle-bending shield tunneling machine is described, for example, in Patent Document 1, which discloses a configuration in which the front end of the screw conveyor of the middle-bending shield tunneling machine is swingably engaged with the partition wall, a support device for supporting the screw conveyor is attached, and a follower device that can move freely following the horizontal displacement of the screw conveyor is installed on the working deck behind the erector ring.

[0005] Furthermore, for example, Patent Document 2 discloses a folding shield tunneling machine comprising a hydraulic jack for rotating and displacing a soil-removing screw conveyor, a stroke meter for measuring the stroke amount of the front body relative to the rear body when the machine is folded, a calculator and converter for calculating a target value for the movement angle of the soil-removing screw conveyor based on the measured stroke amount, and a control means for controlling the hydraulic jack so that the movement angle of the soil-removing screw conveyor approaches the target value. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 7-127375 [Patent Document 2] Japanese Patent Application Publication No. 8-270377 [Overview of the project] [Problems that the invention aims to solve]

[0007] Incidentally, in the case of correcting the misalignment of the soil-removing screw conveyor during curved construction using a folding shield tunneling machine, as considered by the inventor, an operator enters the machine and corrects the misalignment of the soil-removing screw conveyor using chain blocks, jacks, etc.

[0008] In shield tunneling machines, the necessary construction equipment is towed by the machine's internal frame. However, in small-diameter, articulated shield tunneling machines, the internal space is narrow and there is no room to install a frame. Therefore, the towing equipment is mechanically connected to the rear end of the soil-removing screw conveyor via a towing wire or the like, and the soil-removing screw conveyor takes on the role of a towing frame. As a result, a large load is placed behind the soil-removing screw conveyor, and a large force is required to correct any misalignment of the soil-removing screw conveyor. Consequently, this correction work is a time-consuming and laborious task, which presents a challenge.

[0009] The present invention has been made in light of the above-mentioned technical background, and aims to provide a technology that can easily correct misalignment of the soil-removing conveyor when performing curved construction using a folding shield tunneling machine equipped with a soil-removing conveyor that plays a role in pulling subsequent equipment. [Means for solving the problem]

[0010] To solve the above problems, the folding shield tunneling machine of the present invention as described in claim 1 comprises: a machine body having a plurality of body sections engaged with each other in a foldable state; a partition wall provided on the front of the foremost of the plurality of body sections, separating the outside and inside of the machine body; a cutter head supported in front of the partition wall in a rotatable state along the tunnel face; a chamber provided between the cutter head and the partition wall; a through hole drilled in the partition wall so as to connect the chamber and the inside of the machine body; and a pivotable member provided inside the machine body at the position of the through hole. The device is characterized by comprising: a soil removal conveyor that engages with the partition wall in a certain state and discharges soil from the chamber through the through hole; a trailing device positioned behind the main body of the device, mechanically connected to the soil removal conveyor, and towed as the soil removal conveyor moves forward; and an extendable and retractable jack provided between the inner wall surface of the skin plate that constitutes the outer shell of the body portion rearward from the foremost body portion and the soil removal conveyor, with one end directly joined to the inner wall surface of the skin plate and the other end joined to the soil removal conveyor, for correcting the position of the soil removal conveyor.

[0011] The folding shield tunneling machine of the present invention as described in claim 2 is characterized in that, in the invention described in claim 1, the diameter of the cutter head is 3000 mm or less. [Effects of the Invention]

[0012] According to the present invention, when constructing a curved path using a folding shield tunneling machine equipped with a soil-removing conveyor that plays a role in pulling subsequent equipment, it becomes possible to easily correct any misalignment of the soil-removing conveyor. [Brief explanation of the drawing]

[0013] [Figure 1] This is a side view of a folding earth pressure balance shield tunneling machine, which is one embodiment of the present invention. [Figure 2] Figure 1 is an enlarged side view of the main components of the articulated earth pressure balance shield tunneling machine. [Figure 3] Figure 2 is an enlarged plan view of the screw conveyor and surrounding key parts of the articulated earth pressure balance shield tunneling machine. [Figure 4] Figure 3 is a side view of the screw conveyor and its surroundings for a folding earth pressure balance shield tunneling machine. [Figure 5] Figure 3 is a front view of the main components of the folding earth pressure balance shield tunneling machine, specifically the screw conveyor and its surroundings, as seen from the tunnel face. [Figure 6] This is a plan view of the main components of a folding type earth pressure balance shield tunneling machine used for curved construction in the rightward direction. [Figure 7] This is a plan view of the main components of a folding type earth pressure balance shield tunneling machine used for curved construction in the leftward direction. [Modes for carrying out the invention]

[0014] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the drawings used to illustrate the embodiments, the same reference numerals are generally used for identical components, and repeated descriptions of such components will be omitted.

[0015] Figure 1 is a side view of the articulated earth pressure balance shield tunneling machine according to this embodiment. In Figure 1, the inside of the articulated earth pressure balance shield tunneling machine 1 is shown transparently for clarity.

[0016] As shown in Fig. 1, the articulated mud pressure shield tunneling machine 1 of the present embodiment fills sediment excavated by a cutter head 2 into a chamber 4 between the cutter head 2 and the equipment main body 3, injects an additive into the sediment and kneads the mixture to turn the sediment into mud with high plastic fluidity that can be freely deformed and moved, and is an excavating equipment that constructs an excavation pit H while stabilizing the working face by means of the earth pressure. Behind the shield tunneling machine, a plurality of subsequent bogies (subsequent equipment) 5a to 5g are arranged in series along the tunneling direction (the extending direction of the excavation pit H).

[0017] Further, on the inner periphery of the excavation pit H behind the articulated mud pressure shield tunneling machine 1, a plurality of segment rings SG are installed in a state adjacent to each other along the extending direction of the excavation pit H. Each individual segment ring SG is assembled by arranging a plurality of segment parts along the inner periphery of the excavation pit H.

[0018] On the inner peripheral bottom surface of the shield tunnel T constituted by the plurality of segment rings SG, a rail R is laid along the extending direction of the excavation pit H. On the rail R, the plurality of subsequent bogies 5a to 5g described above are mounted in a state of being freely movable along the rail R.

[0019] Here, as the articulated mud pressure shield tunneling machine 1 of the present embodiment, an articulated shield tunneling machine with a small diameter whose caliber (that is, the diameter of the cutter head 2) is, for example, 3000 mm or less is used.

[0020] In this small-diameter, articulated earth pressure balance shield tunneling machine 1, the screw conveyor (soil removal conveyor) 6s, which sends the excavated soil in the chamber 4 to the rear, also serves as the towing frame for the following carriages 5a to 5g. Here, the screw conveyor 6s is connected to the leading following carriage 5a via, for example, a towing wire W1. That is, one end of the towing wire W1 is mechanically connected to the wire attachment point at the rear end of the screw conveyor 6s in a detachable manner via a shackle or the like, while the other end of the towing wire W1 is mechanically connected to the wire attachment point at the front end of the leading following carriage 5a in a detachable manner via a shackle or the like. As a result, a large load is placed on the screw conveyor 6s.

[0021] Furthermore, adjacent trailing trolleys 5a to 5g are connected to each other via, for example, towing wires W2 to W7. Although not particularly limited, the leading trailing trolley 5a is, for example, an operating trolley. Moving from the front to the rear (right in the diagram), the second trailing trolley 5b is, for example, a tail grease trolley, the third trailing trolley 5c is, for example, a small air compressor trolley, the fourth trailing trolley 5d is, for example, a shield oil tank trolley, the fifth trailing trolley 5e is, for example, a shield hydraulic unit trolley, the sixth trailing trolley 5f is, for example, a first cutter hydraulic unit trolley, and the seventh trailing trolley 5g is, for example, a cutter oil tank trolley. In addition, although not shown in the diagram, a second cutter hydraulic unit trolley and a control panel trolley are arranged in order behind trailing trolley 5f.

[0022] Furthermore, the excavated soil discharged from the rear end of the screw conveyor 6s is discharged to the outside via the belt conveyor 6c. The belt conveyor 6c extends diagonally from below the rear end of the screw conveyor 6s toward the inner ceiling of the shield tunnel T, and then extends along the inner ceiling surface to the tunnel entrance.

[0023] Next, Figure 2 is an enlarged side view of the main part of the articulated earth pressure balance shield tunneling machine shown in Figure 1. In Figure 2, the inside of the articulated earth pressure balance shield tunneling machine 1 is shown transparently for clarity.

[0024] The cutter head 2 is a circular drilling disc in a front view for excavating the ground, and is supported on the front of the main body 3 so as to be able to rotate freely in both forward and reverse directions along the circumferential direction of the cutter head 2 with respect to the rotating shaft 2C.

[0025] In the cutter head 2, a bit 2b1, referred to as a center bit, is installed in the hub portion 2H at the center of the front facing the cutting face. Note that other bits, such as a cone-head type roller bit, may also be installed in the hub portion 2H.

[0026] Furthermore, on the front surface of the cutter head 2, outside the hub portion 2H, multiple bits 2b2, such as roller cutters, are installed along the radial direction of the cutter head 2 (from the center of the front surface of the cutter head 2 toward the outer circumference). In addition, other bits, such as lead bits, may be installed outside the hub portion 2H.

[0027] Furthermore, a bit 2b3, for example, called a copy cutter, is installed on the outer surface of the cutter head 2 (the surface facing the excavation pit H shown in Figure 1). This bit 2b3 has functions to control over-excavation during sharp curve construction and the posture of the articulated earth pressure balance shield tunneling machine 1.

[0028] The main body of the device 3 comprises a front body section (body section) 3a and a rear body section (body section) 3b located behind it. The front body section 3a and the rear body section 3b are equipped with, for example, cylindrical skin plates 3am and 3bm. These skin plates 3am and 3bm form the outer shell of the main body of the device 3 and are hollow exterior bodies that create a space inside the main body of the device 3 for installing equipment and the like.

[0029] The front section 3a and the rear section 3b are engaged in a way that allows them to fold in the middle, with the tip of the skin plate 3bm of the rear section 3b fitting into contact with the inner circumferential surface of the skin plate 3am of the front section 3a. As a folding mechanism, for example, a pinless system is used in which a center pin is not provided at the connection between the front section 3a and the rear section 3b. That is, the front section 3a and the rear section 3b are engaged in a way that allows the convex arc-shaped curved surface formed on the outer circumferential surface of the tip of the rear section 3b to slide freely into the concave arc-shaped curved surface formed on the inner circumferential surface of the rear end of the front section 3a. However, a center pin system may also be used as the folding mechanism.

[0030] Furthermore, on the front side of the front body 3a, a partition plate (partition) 9 is provided at a position set back from the front inward from the front of the main body 3, dividing the space inside the main body 3 into the face side and the machine side. The chamber 4 described above is formed on the face side of this partition plate 9 (i.e., the space between the cutter head 2 and the partition plate 9).

[0031] Furthermore, the main body 3 of the equipment is equipped with a soil pressure gauge 11, a cutter drive unit 12, a folding jack 13a, a shield jack 13b, an erector 14, a tail seal section 15, and the aforementioned screw conveyor 6s, etc., behind the chamber 4.

[0032] The earth pressure gauge 11 is a sensor unit that detects the pressure of the mud inside the chamber 4, and is installed with its detection surface facing into the chamber 4. By measuring the mud pressure inside the chamber 4 using this earth pressure gauge 11 and managing the measured value to stay within a predetermined range, the excavation process can be carried out while ensuring the stability of the tunnel face.

[0033] The cutter drive unit 12 is a rotational drive means for rotating the cutter head 2, and multiple units are installed in a row along the circumferential direction of the cutter head 2, between the center and outer circumference of the front surface of the cutter head 2. In this example, an intermediate support drive system is used as the cutter drive system.

[0034] The folding jacks 13a are devices that correct the excavation direction of the earth pressure balance shield tunneling machine 1 by folding it in the middle, and multiple of them are installed in a row along the circumferential direction of the machine body 3 between the front and rear sections of the machine body 3.

[0035] By supplying pressurized oil to this folding jack 13a and advancing the earth pressure balance shield tunneling machine 1 with the front section 3a and rear section 3b folded in a predetermined direction and angle, it is possible to control the excavation direction of the earth pressure balance shield tunneling machine 1.

[0036] The shield jacks 13b are devices that generate thrust to advance the earth pressure balance shield tunneling machine 1 by taking reaction force from the segment ring SG installed at the rear of the machine body 3, and multiple shield jacks are arranged in a row along the circumferential direction of the earth pressure balance shield tunneling machine 1 in front of the rear section 3b.

[0037] The erector 14 is an assembly device that grips the segment ring parts, rotates them in the inner circumferential direction of the borehole, and transports them to the assembly position in the inner circumferential direction of the borehole to assemble the segment ring SG. It is installed inside the rear section 3b in a state that allows it to rotate along the circumferential direction of the borehole by a hydraulic motor (not shown) or the like for driving the erector.

[0038] The tail seal section 15 is a water-stopping mechanism that prevents groundwater, backfill material, etc. from flowing into the inside of the equipment body 3, and is installed in multiple stages along the circumferential direction of the skin plate 3bm on the inner circumferential surface of the rear end of the rear body section 3b.

[0039] The screw conveyor 6s is a soil removal device for transporting soil and sand taken into the chamber 4 to the rear of the main body 3 of the equipment. Here, for example, a ribbon-type screw conveyor 6s is used, in which a spiral blade without a rotating shaft is installed inside the conveyor pipe in a rotatable state.

[0040] In a side view, the screw conveyor 6s penetrates the bulkhead plate 9 from the chamber 4, passes through the hollow portion of the erectoring of the erector 14 inside the rear body 3b in an upward inclined state, and continues to extend inclined to the rear end of the rear body 3b.

[0041] A bracket (not shown) is attached to the rear end of the screw conveyor 6s, and one end of the wire W1 is connected to this bracket via a shackle (not shown) or the like. The wire W1 is made up of, for example, two metal wire ropes connected in series by a connector. The other end of the wire W1 is connected via a shackle or the like to a bracket on the front of the leading trailing trolley 5a (see Figure 1).

[0042] Next, we will explain the structure of this screw conveyor and its surroundings with reference to Figures 3 to 5. Figure 3 is an enlarged plan view of the main parts of the screw conveyor and its surroundings of the articulated earth pressure balance shield tunneling machine shown in Figure 2, Figure 4 is a side view of the screw conveyor and its surroundings of the articulated earth pressure balance shield tunneling machine shown in Figure 3, and Figure 5 is a front view of the main parts of the articulated earth pressure balance shield tunneling machine shown in Figure 3, viewed from the tunnel face side. Note that in Figures 3 to 5, the inside of the articulated earth pressure balance shield tunneling machine 1 is shown transparently to make the explanation easier to understand.

[0043] As shown in Figures 3 and 4, a through-hole 9h is drilled in the partition plate 9 to connect the chamber 4 and the inside of the equipment body 3. The front end of the screw conveyor 6s is engaged with the through-hole 9h in the partition plate 9 via a joint 18, such as a universal pipe joint. This joint 18 allows the screw conveyor 6s to swing freely in the vertical, horizontal, and diagonal directions, with its front end as the pivot point.

[0044] In the articulated earth pressure balance shield tunneling machine 1, when changing the direction of excavation, the rear part of the screw conveyor 6s is displaced in the opposite direction to the bending direction as the front body 3a bends (rotates), causing it to come into contact with equipment such as the erector 14 (see Figure 2) or hindering work inside the machine.

[0045] Therefore, in this embodiment, as shown in Figures 3 to 5, a retractable jack 20 for correcting the position of the screw conveyor 6s is installed between the inner circumferential surface of the tip of the skin plate 3bm of the rear body 3b and the screw conveyor 6s.

[0046] The jack 20 is, for example, a hydraulic jack. That is, by controlling the pressurized oil supplied to the jack 20, it is possible to control the extension and retraction of the jack 20.

[0047] In this embodiment, by controlling the extension and retraction of the jack 20, it is possible to correct the misalignment of the screw conveyor 6s during curved construction of the articulated earth pressure balance shield tunneling machine 1. This prevents the rear part of the screw conveyor 6s from coming into contact with equipment such as the erector 14 (see Figure 2) or becoming an obstacle to work inside the machine.

[0048] A clevis portion 20c1 is mechanically connected to one end of the piston rod 20r that constitutes the jack 20. A part of a bracket portion 20b1, which is joined to the inner circumferential surface of the tip of the skin plate 3bm of the rear body portion 3b, is fitted into the recess of the clevis portion 20c1. The clevis portion 20c1 and the bracket portion 20b1 are mechanically connected to each other in a manner that allows them to rotate freely by pins 20p1 inserted into their respective through holes. As a result, the jack 20 is mechanically connected to the rear body portion 3b in a manner that allows it to rotate freely in the horizontal direction.

[0049] Meanwhile, a clevis portion 20c2 is mechanically connected to one end of the cylinder tube 20t that constitutes the jack 20. A part of a bracket portion 20b2, which is joined to the upper outer circumference of the screw conveyor 6s, is fitted into the recess of this clevis portion 20c2. The clevis portion 20c2 and the bracket portion 20b2 are mechanically connected to each other in a manner that allows them to rotate freely by pins 20p2 inserted into their respective through holes. In this way, the jack 20 is mechanically connected to the screw conveyor 6s in a manner that allows it to rotate freely in the horizontal direction.

[0050] In this embodiment, by mechanically connecting the jack 20 for correcting the position of the screw conveyor 6s directly to the inner circumferential surface of the skin plate 3bm of the rear body 3b, a jack 20 with a relatively large capacity can be used.

[0051] Therefore, even if the screw conveyor 6s is acting as a towing frame for subsequent equipment such as the trailing trolleys 5a to 5g, any misalignment of the screw conveyor 6s during curved construction by the articulated earth pressure balance shield tunneling machine 1 can be easily corrected by the jack 20.

[0052] Furthermore, as shown in Figure 5, the jack 20 that corrects the misalignment of the screw conveyor 6s has a simple structure and does not take up much space, so it does not get in the way of workers moving in and out between the front section 3a and the rear section 3b, and does not hinder work.

[0053] Next, an example of the operation of the jack 20 during curved construction of the articulated earth pressure balance shield tunneling machine 1 of this embodiment will be explained using Figures 6 and 7.

[0054] Figure 6 is a plan view of the main components of the articulated earth pressure balance shield tunneling machine when performing curved construction to the right, and Figure 7 is a plan view of the main components of the articulated earth pressure balance shield tunneling machine when performing curved construction to the left. In Figures 6 and 7, the inside of the articulated earth pressure balance shield tunneling machine 1 is shown through for clarity of explanation. Also, the dashed lines CL1 and CL2 in Figures 6 and 7 indicate the central axis of the screw conveyor 6s.

[0055] As shown in Figure 6, when the articulated earth pressure balance shield tunneling machine 1 is performing curved construction to the right, the articulated jack 13a on the right side (the side in the direction of the curve, upper side of Figure 6) (see Figure 2) is not driven, and the articulated jack 13a on the opposite left side (the side opposite the direction of the curve, lower side of Figure 6) (see Figure 2) is driven and extended. This rotates the front section 3a to the right (upper side of Figure 6) and changes the direction of excavation. Alternatively, the articulated jack 13a on the right side may be retracted while the articulated jack 13a on the left side is extended.

[0056] At this time, as the front section 3a rotates, the rear part of the screw conveyor 6s is displaced to the left (opposite to the direction of the bend, the lower side of Figure 6), causing it to come into contact with equipment such as the erector 14 (see Figure 2) or becoming an obstacle to work inside the machine.

[0057] Therefore, in this embodiment, the misalignment of the screw conveyor 6s is corrected by the retractable jack 20. Specifically, the retractable jack 20 is retracted to rotate the rear part of the screw conveyor 6s to the right by a predetermined angle θ1 (towards the bending direction, upward in Figure 6) and pull it towards the right side of the machine (upper side in Figure 6). Although not particularly limited, the predetermined angle θ1 is, for example, about 5°.

[0058] This allows the jack 20 to correct the misalignment of the screw conveyor 6s, preventing the rear portion of the screw conveyor 6s from being displaced and coming into contact with equipment such as the erector 14 (see Figure 2) or obstructing work inside the machine during rightward curve construction of the articulated earth pressure balance shield tunneling machine 1.

[0059] Furthermore, in this embodiment, even if the screw conveyor 6s is acting as a towing frame for subsequent equipment, a jack 20 with a relatively large capacity can be used as described above, so any misalignment of the screw conveyor 6s can be easily corrected by the jack 20.

[0060] On the other hand, as shown in Figure 7, when the articulated earth pressure balance shield tunneling machine 1 is performing curved construction to the left, the articulated jack 13a on the left side (the side in the direction of the curve, lower side of Figure 7) (see Figure 2) is not driven, and the articulated jack 13a on the opposite right side (upper side of Figure 7) (see Figure 2) is driven and extended. This rotates the front section 3a to the left (lower side of Figure 7) and changes the direction of excavation. Alternatively, the articulated jack 13a on the left side may be retracted while the articulated jack 13a on the right side is extended.

[0061] In this case as well, the rotation of the front section 3a causes the rear part of the screw conveyor 6s to be displaced to the right (upper side of Figure 7), which can cause it to come into contact with equipment such as the erector 14 (see Figure 2) or become an obstacle to work inside the machine.

[0062] Therefore, in this embodiment, the positional misalignment of the screw conveyor 6s is corrected using an extendable jack 20. Specifically, the extendable jack 20 is extended, and the rear portion of the screw conveyor 6s is rotated to the left (downward in Figure 7) by a predetermined angle θ2 to separate it from the right side of the machine (upper inner surface of the machine in Figure 7). Although not particularly limited, the predetermined angle θ2 is, for example, about 5°.

[0063] This prevents the rear part of the screw conveyor 6s from being displaced and coming into contact with equipment such as the erector 14 (see Figure 2) or obstructing work inside the machine when the articulated earth pressure balance shield tunneling machine 1 is performing leftward curve construction.

[0064] Furthermore, in this embodiment, even if the screw conveyor 6s is acting as a towing frame for subsequent equipment, a jack 20 with a relatively large capacity can be used as described above, so any misalignment of the screw conveyor 6s can be easily corrected by the jack 20.

[0065] The present inventors have described the invention in detail based on embodiments, but the embodiments disclosed herein are illustrative in all respects and are not limited to the disclosed technology. That is, the technical scope of the present invention should not be interpreted restrictively based on the description of the embodiments above, but rather in accordance with the claims, and includes the equivalent technology of the claimed technology and all modifications that do not depart from the gist of the claims.

[0066] For example, in the above embodiment, a case using a ribbon-type screw conveyor 6s was described, but it is not limited to this, and a screw conveyor with a shaft, which has an axis at the center of the conveyor and blades arranged around it, may also be used.

[0067] Furthermore, although the above embodiment describes the case in which a hydraulic jack 20 is used, it is not limited to this, and for example, a pneumatic jack may also be used. When a pneumatic jack is used, it is lighter than a hydraulic jack and maintenance can be made easier.

[0068] Furthermore, although the above embodiment describes the case in which a screw conveyor is used as the soil removal device, it is not limited to this and can also be applied when soil removal devices other than screw conveyors are used.

[0069] Furthermore, although the above embodiment describes a case where the main body of the articulated shield tunneling machine is divided into a front section and a rear section, it is not limited to this, and can also be applied to articulated shield tunneling machines that are divided into more than two sections and can be folded in multiple stages. [Industrial applicability]

[0070] The above description illustrates the application of the present invention to a mud pressure balance shield tunneling machine, but it is not limited to this. For example, the present invention can also be applied to a TBM (Tunnel Boring Machine). [Explanation of Symbols]

[0071] 1. Articulated earth pressure balance shield tunneling machine 2 cutter heads 2b1, 2b2, 2b3 bits 2C Rotating shaft section 2H Hub Section 3. Main unit of the device 3a Front torso (torso) 3am Skin Plate 3b Rear torso (torso) 3bm Skin Plate 4 chambers 5a~5g Following cart (following equipment) 6s Screw Conveyor 6c Belt Conveyor 9 Partition plate (partition part) 9h through hole 11 Soil pressure gauge 12 Cutter drive unit 13a Folding jack 13b Shield Jack 14 Erecta 15 Tail seal section 18 Joint section 20 Jacks 20r Piston Rod 20t Cylinder Tube 20b1, 20b2 Bracket section 20c1, 20c2 Clevis section 20p1, 20p2 pins SG Segment Ring H drilling shaft T-shield tunnel W1~W7 Wire

Claims

1. The device body comprises multiple body sections that are engaged with each other in a foldable state, A partition wall is provided on the front of the foremost of the multiple body sections, separating the outside and inside of the main body of the device, A cutter head is supported in front of the partition wall portion in a manner that allows it to rotate along the cutting face, A chamber provided between the cutter head and the partition wall, A through hole is drilled in the partition wall so as to connect the chamber and the inside of the main body of the device, A soil removal conveyor is provided inside the main body of the equipment, is engaged with the partition wall in a swingable manner at the position of the through-hole, and discharges soil from the chamber through the through-hole. A trailing piece of equipment is positioned behind the main body of the aforementioned equipment, mechanically connected to the soil-removing conveyor, and towed as the soil-removing conveyor moves forward. Between the inner wall surface of the skin plate that constitutes the outer shell of the torso rearward from the foremost torso section and the soil removal conveyor, a retractable jack is provided, with one end directly joined to the inner wall surface of the skin plate and the other end joined to the soil removal conveyor, for correcting the position of the soil removal conveyor. A folding shield tunneling machine characterized by having the following features.

2. The folding shield tunneling machine according to claim 1, characterized in that the diameter of the cutter head is 3000 mm or less.

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