JP2014177768A - Boring resumption method of tunnel boring machine, and tunnel boring machine used for the same - Google Patents

Boring resumption method of tunnel boring machine, and tunnel boring machine used for the same Download PDF

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JP2014177768A
JP2014177768A JP2013050860A JP2013050860A JP2014177768A JP 2014177768 A JP2014177768 A JP 2014177768A JP 2013050860 A JP2013050860 A JP 2013050860A JP 2013050860 A JP2013050860 A JP 2013050860A JP 2014177768 A JP2014177768 A JP 2014177768A
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cylindrical body
edge cutting
tunnel
plurality
tunnel excavator
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JP6217095B2 (en
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Yoichi Moriya
洋一 守屋
Arisa Saito
有佐 斎藤
Koji Noguchi
宏治 野口
Naoki Kato
直樹 加藤
Hiroaki Yamamoto
寛哲 山元
Yuzo Yamamoto
裕三 山本
Keijiro Nonaka
圭二郎 野中
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Ohbayashi Corp
株式会社大林組
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Abstract


Even if the earth pressure from the inflatable ground falls into a state in which advancement is impossible, the tunnel excavator is quickly escaped from the restraint and the excavation is resumed.
In a tunnel excavator 1 according to the present invention, a drilling boring machine 9 is disposed in an internal space of a cylindrical body 8b so as to be rotatable around an axis, and a rotational drive mechanism of the drilling boring machine is provided. The cylindrical body is formed so as to penetrate the rod insertion hole 17 through which the edge cutting rod 14 connected to 13 is inserted from the rear of the inner space of the cylindrical body 8b to the front of the outer space and along the circumferential direction of the cylindrical body 8b. A plurality of the fuselage are installed in the body, and in front of the rod insertion hole 17, the lubricant injection holes 21 a and 21 b are formed so as to penetrate. It consists of
[Selection] Figure 1

Description

  The present invention relates to a shield machine suitable for excavation of earth and sand ground, a tunnel excavation restart method for a tunnel excavator such as a shield type TBM suitable for rock excavation, and a tunnel excavator used therefor.

  As an excavator used for tunnel construction, a shield machine suitable for earth and sand ground is well known, and it excavates the front ground by rotating the cutter head arranged at the tip of the cylindrical body made of skin plate. While the excavated earth and sand are taken inside the cutter head and discharged to the rear, the ground is sequentially covered by assembling the segments using an erector. The segment assembly, the forward operation by the propulsion jack using the segment as a reaction force body, and the like can be safely performed in the internal space of the cylindrical body.

  In addition, shield type TBM in rock excavation is the same as the shield machine in the case of forward operation by the reaction force from the excavation ground through the reaction force from the segment or the excavation ground via the gripper as well as the earth removal behind the cut rock Can be done safely in the interior space.

  On the other hand, when creating a tunnel in the bedrock, if the earth covering exceeds 1,000 m, you may encounter a so-called expansive ground that begins to squeeze to reduce the sky inside the tunnel. The earth pressure from the expansive natural ground acts on the cylindrical body of the shield-type TBM to restrain the shield-type TBM, and the shield-type TBM falls into a state where it cannot move forward.

Japanese Patent No. 2942872

  In such a situation, conventionally, a water stop is ensured by injecting a chemical solution into the ground surrounding the shield-type TBM, and then the surrounding ground is cut from the tail portion of the cylindrical body. By providing a gap between the outer peripheral surface of the cylindrical body and the surrounding natural ground, the shield type TBM is cut off from the peripheral natural ground, and then the forward movement of the shield type TBM is resumed.

  However, since the expansive natural ground oozes out into the tunnel due to the earth pressure, in order to cut off the shield type TBM restrained by the expansive natural ground from the expansive natural ground, the inner surface is cut by cutting. The cutting area will be gradually expanded while supporting the retreated ground with a support work quickly, so it takes several months before the shield-type TBM can escape, that is, it can resume moving forward. In some cases, there is a problem that it is impossible to make use of the advantages of the shielded TBM that can be applied rapidly.

  In addition, the work of providing a gap between the outer peripheral surface of the cylindrical body and the surrounding natural ground is a work performed by a worker entering a confined place, so there is a concern that safety may be insufficient. .

  Incidentally, the situation described above can also occur in a shield machine on earth and sand ground as well.

  The present invention has been made in consideration of the above-described circumstances, and is a tunnel excavation machine resuming method capable of quickly resuming excavation even if it is restrained by earth pressure from a natural ground and cannot move forward. And it aims at providing the tunnel machine used for it.

  In order to achieve the above-mentioned object, the tunnel excavation method of the tunnel excavator according to the present invention is the cylindrical shape constituting the tunnel excavator when the tunnel excavator is stopped in the ground as described in claim 1. A plurality of edge cutting rods are passed through the body in parallel from the rear of the inner space toward the front of the outer space and along the circumferential direction of the cylindrical body, and the ground penetration part of the plurality of edge cutting rods is It is made to oppose the outer peripheral surface so as to surround the cylindrical body.

  Moreover, the excavation restart method of the tunnel excavator according to the present invention is a method in which a grout material is discharged between the adjacent edge cutting rods among the plurality of edge cutting rods via the edge cutting rods.

  Moreover, the excavation resuming method of the tunnel excavator according to the present invention is to inject a lubricant into a natural ground region extending between the outer peripheral surface of the cylindrical body and the plurality of edge cutting rods.

  Further, in the tunneling machine restarting method according to the present invention, when the plurality of edge cutting rods are penetrated into the ground, the plurality of edge cutting rods are penetrated into the ground by controlling the traveling direction thereof. The portion is arranged so as to be substantially parallel to the outer peripheral surface of the cylindrical body.

  Further, as described in claim 5, the tunnel excavator according to the present invention has a drilling boring machine disposed in the internal space of the cylindrical body so as to be rotatable about the axis or about an axis parallel to the axis. In addition, a rod insertion hole through which a rod for edge cutting connected to the rotation driving mechanism of the drilling boring machine is inserted passes from the rear of the inner space of the cylindrical fuselage to the front of the outer space of the cylindrical fuselage. A plurality of the cylindrical body is installed along the circumferential direction, and the edge cutting rod is formed of a hollow rod in which a grout material discharge hole is formed along a material axis. A lubricant injection hole is formed through the front position of the hole.

  In the tunnel excavator according to the present invention, the drilling boring machine is configured to be able to control the traveling direction of the edge cutting rod.

  In the excavation restart method for a tunnel excavator according to the first aspect of the invention, when the tunnel excavator is stopped in the ground, the tubular body constituting the tunnel excavator is directed from the rear of the inner space to the front of the outer space. In addition, a plurality of edge cutting rods are passed in parallel along the circumferential direction of the cylindrical body, and the ground penetration part of the plurality of edge cutting rods is opposed to the outer peripheral surface so as to surround the cylindrical body. .

  In this way, at least part of the earth pressure from the natural ground acting on the cylindrical body is transmitted to the edge cutting rod, and part or all of the transmission load is supported by the rigidity of the edge cutting rod. Or distributed to the surrounding natural ground through the edge cutting rod in such a manner that it does not reach the cylindrical body.

  That is, the edge cutting rod serves to block at least a part of the earth pressure from the natural ground so as not to be transmitted to the cylindrical body, that is, exhibits an edge cutting action.

  Therefore, it is possible to reduce the earth pressure acting on the outer peripheral surface of the cylindrical body by working in a safe place such as the internal space of the cylindrical body, rather than outside the tunnel excavator as in the prior art. Along with this, it is possible to reduce the frictional force generated between the cylindrical body and the ground when the tunnel machine is advanced, and thus the tunnel machine can be safely and reliably advanced from the restrained state. Transition to a new state.

  The tunnel excavator mainly corresponds to a shielded TBM excavating expansible rock mass, but the earth pressure from the natural ground is applied to the cylindrical body, and the forward movement is impossible due to the restraint by the earth pressure. Any type of tunnel machine can be used as long as there is a concern about falling into the ground, and for example, it can be applied to a shield machine that excavates earth and sand ground.

  Further, the tunnel excavator is not limited to a circular excavation section, and can be applied to excavators having a double circle, a double circle, an ellipse, or a rectangle.

  The plurality of edge cutting rods can be surely exerted the edge cutting action of earth pressure by arranging them closely, but among the plurality of edge cutting rods, the edge cutting rods are adjacent to each other. If the grout material is discharged through the edge cutting rods, the discharged grout material solidifies between the edge cutting rods and becomes a support wall that receives earth pressure, so the number of edge cutting rods is small. Even if it exists, it becomes possible to cut the earth pressure from the natural ground efficiently.

  As described above, the edge cutting rod exerts the function of blocking the earth pressure, so that the earth pressure on the cylindrical body is reduced. As a result, the tunnel excavator is released from the restraint by the earth pressure and the advancement is resumed. However, if the lubricant is injected into the ground area that extends between the outer peripheral surface of the cylindrical body and the plurality of edging rods, the cylinder when the tunnel machine is to be advanced Since the friction coefficient between the cylindrical body and the natural ground, and hence the frictional force, is reduced by the lubricant, the resumption of forward movement is further facilitated in combination with the earth pressure reducing action by the edge cutting rod.

  In addition, as described above, when a support wall is formed between the edge-cutting rods by discharging the grout material between the adjacent edge-cutting rods, the support wall prevents the lubricant from escaping. Since it also plays a role, the friction reducing action is surely exhibited.

  When the rod for edge cutting is passed through the cylindrical body so as to go from the rear of the inner space of the cylindrical body to the front of the outer space, and the ground penetration part is opposed to the outer peripheral surface so as to surround the cylindrical body, The relative angle between the rod and the cylindrical body is not necessarily parallel, but when the plurality of edge cutting rods are penetrated into the ground, the plurality of edge cutting rods can be controlled by controlling the traveling direction thereof. If the ground penetration part is arranged so as to be substantially parallel to the outer peripheral surface of the cylindrical body, the distance between the tip of the edge cutting rod and the outer peripheral surface of the cylindrical body is increased, or the distance between the edge cutting rods is increased. Can be prevented from spreading at the tip, so that the earth pressure blocking function by the edge cutting rod can be surely exhibited.

  In addition, when the grout material is discharged as described above, the interval between the edge cutting rods does not increase at the tip, so that a support wall can be reliably formed between the edge cutting rods. When the material injection is performed, the range in which the lubricant is to be injected is limited to the vicinity of the outer peripheral surface of the cylindrical body, so that the injection efficiency is increased and a rational friction reduction process can be performed.

  A tunnel excavator according to a second aspect of the present invention has a drilling boring machine disposed in an internal space of a cylindrical body so as to be pivotable about an axis or about an axis parallel to the axis. In the cylindrical body so as to penetrate the rod insertion hole through which the edge cutting rod connected to the rotation drive mechanism passes from the rear of the inner space of the cylindrical body to the front of the outer space and along the circumferential direction of the cylindrical body. A plurality of installations are made of cylindrical rods, with a lubricant injection hole penetrating through the front position of the rod insertion hole, and a rim cutting rod formed of a hollow rod formed with a grout material discharge hole along the material axis. is there.

  In such a configuration, when the earthen pressure from the natural ground acts on the cylindrical body and the movement of the tunnel excavator is restricted, the edge cutting rod connected to the rotary drive mechanism of the drilling boring machine is While passing through the rod insertion hole of the cylindrical body from the rear of the inner space to the front of the outer space, it is continuously inserted into the outer ground.

  In performing the operation of penetrating these edge-cutting rods and penetrating into the natural ground, a plurality of drilling boring machines are arranged along the circumferential direction of the cylindrical fuselage while appropriately turning the drilling boring machine around an axis or an axis parallel to the axis. This is performed for each of the formed rod insertion holes, and the ground penetration portions of the plurality of edge cutting rods are opposed to the outer peripheral surface so as to surround the cylindrical body.

  In this way, at least part of the earth pressure from the natural ground acting on the cylindrical body is transmitted to the edge cutting rod, and part or all of the transmission load is supported by the rigidity of the edge cutting rod. Or distributed to the surrounding natural ground through the edge cutting rod in such a manner that it does not reach the cylindrical body.

  That is, the edge cutting rod serves to block at least a part of the earth pressure from the natural ground so as not to be transmitted to the cylindrical body, that is, exhibits an edge cutting action.

  Therefore, it is possible to reduce the earth pressure acting on the outer peripheral surface of the cylindrical body by working in a safe place such as the internal space of the cylindrical body, rather than outside the tunnel excavator as in the prior art. Along with this, it is possible to reduce the frictional force generated between the cylindrical body and the ground when the tunnel machine is advanced, and thus the tunnel machine can be safely and reliably advanced from the restrained state. Transition to a new state.

  Also, by turning the drilling boring machine around the machine axis or around the axis parallel to the machine axis, a plurality of edging rods are efficiently inserted into each of the rod insertion holes along the circumferential direction of the cylindrical body. In addition, the plurality of edge cutting rods can be efficiently passed through the cylindrical body.

  Further, among the plurality of edge cutting rods, the grout material is discharged between the edge cutting rods between the edge cutting rods by discharging the grout material through the grout material discharge holes of the edge cutting rod. It becomes possible to form a support wall that solidifies and receives earth pressure, and even when the number of rods for edge cutting is small, it is possible to efficiently edge the earth pressure from the natural ground and to inject lubricant. By injecting the lubricant into the natural ground spreading between the outer peripheral surface of the cylindrical fuselage and the plurality of edging rods through the hole, the cylindrical fuselage and the natural ground when the tunnel machine is advanced It is possible to reduce the friction coefficient, and thus the frictional force, with the use of the lubricant, and the resumption of advancement is further facilitated in combination with the decrease in earth pressure.

  If the tunnel boring machine is a circular section type with a single cutter head, the drilling boring machine can be swiveled around its axis, or a multi-circular section type with multiple cutter heads (multiple type) Type), it may be swiveled around an axis parallel to the machine axis, for example, around the rotation axis of each cutter head.

  The configuration of the drilling boring machine is arbitrary, but if it is configured by a so-called universal boring machine that can control the direction of travel of the edge cutting rod, when the plurality of edge cutting rods are inserted into the ground, Since the edge cutting rods can be arranged so that the intrusion portion of the ground is substantially parallel to the outer peripheral surface of the cylindrical body, the distance between the tip of the edge cutting rod and the outer peripheral surface of the cylindrical body is increased. Thus, it is possible to prevent the gap between the edge cutting rods from expanding at the tip, and thus the earth pressure blocking function by the edge cutting rod can be reliably exhibited.

  In addition, since the distance between the edge cutting rods does not increase at the tip, a support wall can be reliably formed between the edge cutting rods, and the area where the lubricant should be injected is the outer periphery of the cylindrical body. Since it is limited to the vicinity of the surface, the injection efficiency of the lubricant is increased, and a rational friction reduction process can be performed.

The longitudinal cross-sectional view of the tunnel excavation machine which concerns on this embodiment. The cross-sectional view along the AA line direction. The longitudinal cross-sectional view which showed a mode that the rod 14 for edge cutting penetrated into the natural ground so that cylindrical body 8a, 8b might be surrounded. FIG. 3 is a detailed cross-sectional view showing a state in which a support wall is formed by the grout material discharged through the edge cutting rod 14, and earth pressure is supported by the support wall to prevent the sliding material 32 from escaping. The cross-sectional view of the tunnel excavation machine which concerns on a modification.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Embodiments of a tunnel excavation method for a tunnel excavator and a tunnel excavator used therefor according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a longitudinal sectional view showing a tunnel excavator according to the present embodiment, and FIG. 2 is a transverse sectional view along the line AA. As can be seen from these drawings, the tunnel excavator 1 according to the present embodiment connects the front cylinder 4 and the rear cylinder 6 via a thrust jack 7, and the cutter head 2 is disposed in front of the front cylinder 4. In addition, the front cylinder 4 is configured as a front gripper 3, and the rear cylinder 6 is configured as a shield type TBM equipped with a rear gripper 5.

  Here, the front body 4 is configured to cover the internal space by the cylindrical body 8a, and the rear body 6 is configured to cover the internal space by the cylindrical body 8b. The annular rails 11 and 11 are fixed to the installed beams at a predetermined horizontal distance so as to surround the installed beams 10a and 10b, respectively, and the mounting angular position is set along the circumferential direction of the annular rail. The base 12 of the drilling boring machine 9 is attached to the annular rail so that it can be changed. By changing the mounting angle position to the annular rails 11, 11, the drilling boring machine 9 is attached to the tunneling machine 1. It can turn around the machine axis (in the direction of the arrow in FIG. 1).

  The annular rail 11 is formed by bending, for example, H-shaped steel around a strong axis, and is fixed to the installation beams 10a and 10b on one flange side, and the base 12 of the drilling boring machine 9 is narrowly attached to the other flange side. Can be configured.

  In addition, the belt conveyor 18 which conveys the earth and sand cut by the cutter head 2 is positioned between the installation beams 10a and 10b, and is disposed so as to pass near the center of the annular rails 11 and 11.

  The cylindrical body 8b is formed with a rod insertion hole 17 extending along the circumferential direction of the cylindrical body from the rear of the inner space toward the front of the outer space, in other words, obliquely forward with respect to the axle. In addition, a guide tube 16 is erected on the inner peripheral surface of the cylindrical body 8 b obliquely rearward so that the hollow hole 15 communicates with the rod insertion hole 17.

  In this embodiment, the rod insertion holes 17 and the guide tubes 16 formed with the hollow holes 15 communicating with the rod insertion holes 17 are installed so as to be 24 in total at a pitch of 15 °. Is configured such that an edge cutting rod 14 connected to the rotary drive mechanism 13 of the hole boring machine 9 is inserted.

  The edge cutting rod 14 is constituted by a hollow rod in which a grout material discharge hole (not shown) is formed along the material axis. When the edge cutting rod 14 is penetrated into a natural ground, a hole boring machine 9 is formed in the natural ground. The grout material supplied from the side can be discharged.

  Here, the drilling boring machine 9 is configured as a universal boring machine so that the direction of travel of the edge cutting rod 14 can be controlled when the rod 14 is being advanced in the natural ground.

  On the other hand, in the cylindrical body 8b, a forward position of the rod insertion hole 17 is formed with a lubricant injection hole 21b for injecting the lubricant into the surrounding natural ground, and in front of the cylindrical body 8a. A similar lubricant injection hole 21a is also formed through the position.

  A plurality of the lubricant injection holes 21a and 21b may be installed along the circumferential direction of the cylindrical body 8a and 8b.

  In order to carry out the excavation restart method of the tunnel excavator according to the present embodiment with the tunnel excavator 1, the earth pressure from the natural ground acts on the cylindrical bodies 8a and 8b, so that the movement of the tunnel excavator 1 is restricted. 3, first, the edge cutting rod 14 connected to the rotation drive mechanism 13 of the drilling boring machine 9 is inserted into the hollow hole 15 of the guide tube 16, and then the drilling boring machine 9 is operated. By doing so, the edge cutting rod is passed through the rod insertion hole 17 provided in the cylindrical body from the rear of the inner space of the cylindrical body 8b to the front of the outer space, and is continuously inserted into the outer ground 31.

  In addition, when inserting the edge cutting rod 14 into the hollow hole 15 of the guide tube 16, a water leakage prevention measure is taken in advance using a pre-pender or other water stop device.

  When inserting and penetrating the edge cutting rod 14 and penetrating into the natural ground 31, the drilling boring machine 9 is sequentially swung around the axis, and a plurality of rods inserted along the circumferential direction of the cylindrical body 8b are inserted. By carrying out with respect to each of the holes 17, the ground penetration portions of the plurality of edge cutting rods 14 are opposed to the outer peripheral surfaces so as to surround the cylindrical bodies 8 a and 8 b.

  Here, when penetrating the edge cutting rod 14 into the natural ground 31, the drilling boring machine 9 is driven and controlled so that the natural ground penetration portion is substantially parallel to the outer peripheral surface of the cylindrical bodies 8 a and 8 b.

  As described above, when the ground-penetrating part of the edge cutting rod 14 is opposed to the outer peripheral surface so as to surround the cylindrical body 8a, 8b, it is possible to remove from the natural ground 31 acting on the cylindrical body 8a, 8b. At least a part of the earth pressure is transmitted to the edge cutting rod 14, and part or all of the transmitted load is supported by the rigidity of the edge cutting rod 14 or is used for edge cutting in such a way that it does not reach the cylindrical bodies 8a and 8b. Dispersed in the surrounding natural ground 31 through the rod 14.

  That is, the edge cutting rod 14 serves to block at least a part of the earth pressure from the natural ground 31 so as not to be transmitted to the cylindrical body 8a, 8b, that is, exhibits an edge cutting action.

  When the penetration of the edge cutting rod 14 into the natural ground 31 is completed, as shown in FIG. 4, the edge cutting rod is inserted between the edge cutting rods 14, 14 adjacent to each other, as shown in FIG. 4. The grout material is discharged through the formed grout material discharge hole.

  In this case, the discharged grout material is solidified between the edge cutting rods 14 and 14 to form the support wall 41, and the support wall is used for the edge cutting at a portion where the edge cutting rod 14 is not penetrated. Supports earth pressure instead of rods.

  Further, the lubricant 32 is injected into a natural mountain region extending between the outer peripheral surface of the cylindrical body 8a, 8b and the plurality of edge cutting rods 14 through the lubricant injection holes 21a, 21b.

  In this way, the friction coefficient between the cylindrical bodies 8a, 8b and the natural ground 31 when the tunnel excavator 1 is advanced is reduced by the lubricant 32.

  As described above, according to the tunnel excavator 1 according to the present embodiment and the excavation restart method of the tunnel excavator using the tunnel excavator 1, the edge cutting rod 14 exhibits the edge cutting action, and the earth pressure from the natural ground 31 is reduced. Since a part is cut off so as not to be transmitted to the cylindrical body 8a, 8b, the earth pressure acting on the outer peripheral surface of the cylindrical body 8a, 8b decreases, and accordingly, the tunnel excavator 1 tries to move forward. At this time, the frictional force generated between the cylindrical bodies 8a, 8b and the natural ground 31 is also reduced.

  Therefore, for example, even when the tunnel excavator 1 is in a state where it cannot move forward due to earth pressure from the expansive ground, the tunnel excavator 1 is promptly escaped from the restraint, and the excavation is resumed. Can do.

  In addition, according to the tunnel excavator 1 and the tunnel excavation restart method using the tunnel excavator 1 according to the present embodiment, the tunnel excavator 1 can be operated by inserting and penetrating the edge cutting rod 14 and penetrating into the natural ground 31. Since it can be carried out from the internal space of the cylindrical body 8b, it is much safer to resume the excavation of the tunnel excavator 1 compared to the conventional case where it is necessary to work outside the tunnel excavator and in a narrow space. It is possible to perform the operation reliably and reliably.

  Further, according to the tunnel excavator 1 according to the present embodiment, since the drilling boring machine 9 is installed so as to be pivotable around the axis of the tunnel excavator 1, a plurality of edge cutting rods 14 are arranged in the circumferential direction of the cylindrical body 8b. It is possible to efficiently insert each of the rod insertion holes 17 along the cylindrical body 8b through the plurality of edge cutting rods.

  In addition, according to the tunnel digging machine 1 and the tunnel digging resume method using the tunnel digging machine according to the present embodiment, among the plurality of edge cutting rods 14, the edge cutting rods 14 and 14 are adjacent to each other. Since the grout material is discharged through the grout material discharge hole formed in the rod for cutting, the support wall 41 solidified and formed between the edge cutting rods 14 and 14 applies earth pressure instead of the edge cutting rod. Thus, even when the number of the edge cutting rods 14 is small, the earth pressure from the natural ground 31 can be efficiently edge cut.

  Further, according to the tunnel excavator 1 and the tunnel excavator restarting method using the tunnel excavator 1 according to the present embodiment, the outer peripheral surface of the cylindrical body 8a, 8b and a plurality of edge cuts via the lubricant injection holes 21a, 21b. Since the lubricating material 32 is injected into the natural ground region that spreads between the rod 14 for use, the frictional force between the cylindrical bodies 8a, 8b and the natural ground 31 when the tunnel excavator 1 is advanced is obtained. Reduced by the lubricant 32.

  Therefore, in combination with the earth pressure reducing action by the edge cutting rod 14, the forward resumption of the tunnel excavator 1 is further facilitated.

  Incidentally, since the support wall 41 solidified between the edge-cutting rods 14 and 14 serves to prevent the sliding material 32 from escaping, the above-described friction reducing action is reliably exhibited.

  In addition, according to the tunnel excavator 1 and the tunnel excavation restart method using the tunnel excavator 1 according to the present embodiment, when the plurality of edge cutting rods 14 are penetrated into the natural ground 31, by controlling the traveling direction thereof, The plurality of edge-cutting rods are arranged so that their natural mountain penetration portions are substantially parallel to the outer peripheral surface of the cylindrical body 8a, 8b, so that the tip of the edge-cutting rod 14 and the cylindrical body 8a, It is possible to prevent the distance between the outer peripheral surface of 8b from increasing and the distance between the edge cutting rods 14, 14 from expanding at the tip.

  Therefore, the function of blocking the earth pressure by the edge cutting rod 14 can be surely exerted, and the distance between the edge cutting rods 14, 14 does not widen at the tip, so that the edge cutting rods 14, 14 can be reliably connected. In addition, the support wall 41 can be formed and the range in which the lubricant 32 should be injected is limited to the vicinity of the outer peripheral surface of the cylindrical body 8a, 8b, so that the injection efficiency is increased and a rational friction reduction process is performed. It becomes possible.

  In this embodiment, the edge cutting rod 14 is arranged around the cylindrical bodies 8a and 8b. However, it is not always necessary to arrange the entire circumference. For example, only the upper half of the cylindrical bodies 8a and 8b is covered. It is possible to employ a configuration in which the components are arranged as described above.

  In the present embodiment, the tunnel excavator of the present invention is described as an example of a shield type TBM. However, instead of this, a shield machine that excavates the earth and sand ground may be used.

  Further, in this embodiment, the tunnel machine of the present invention is configured by the shielded TBM excavating a circular cross section, but the present invention is not necessarily limited to the circular cross section. For example, the tunnel excavator having a double circular excavation cross section is used. Can also be applied.

  FIG. 5 is a cross-sectional view showing an example in which the present invention is applied to a series of shield machines, and the drilling boring machine 9 can be turned around the rotation axis of each cutter head (not shown). In the cylindrical body 58 that is configured to have a cross-sectional shape in which two circles are partially overlapped, a rod insertion hole that penetrates from the rear of the inner space toward the front of the outer space 17 is formed along the circumferential direction of the cylindrical body, and the guide tube 16 is formed on the inner peripheral surface of the cylindrical body 58 so that the hollow hole 15 communicates with the rod insertion hole 17. It stands for

  It is possible to apply the same excavation resuming method as described above to such a double shield machine, but the procedure and operational effects thereof are substantially the same as those of the above-described embodiment. Is omitted.

  Further, in the present embodiment, the grout material is discharged between the adjacent edge cutting rods 14 and 14 through the grout material discharge holes formed in the edge cutting rods, and through the lubricant injection holes 21a and 21b. The lubricating material 32 is injected into a natural mountain region extending between the outer peripheral surfaces of the cylindrical bodies 8a, 8b and the plurality of edge cutting rods 14, but the edge cutting rods 14 are finely arranged and the edge cutting is performed. If it is not necessary to form a support wall by the grout material and reduce the frictional force by the sliding material 32 by receiving more earth pressure with the rod for use, either or both of these may be omitted. .

DESCRIPTION OF SYMBOLS 1 Tunnel digging machine 8a, 8b Cylindrical body 9 Drilling boring machine 13 Rotary drive mechanism 14 Rod for cutting edge 17 Rod insertion hole 21a, 21b Lubricant injection hole 32 Lubricant

Claims (6)

  1. When the tunnel excavator is stopped in the ground, it is used to cut the edges of the cylindrical body constituting the tunnel excavator so as to go from the rear of the inner space to the front of the outer space and along the circumferential direction of the cylindrical body. A method for resuming excavation of a tunnel excavator, wherein a plurality of rods are penetrated in parallel, and the ground penetration portion of the plurality of edge cutting rods is opposed to the outer peripheral surface so as to surround the cylindrical body.
  2. The tunnel resuming method for a tunnel digging machine according to claim 1, wherein a grout material is discharged between the plurality of edge cutting rods between the adjacent edge cutting rods via the edge cutting rods.
  3. The tunnel resuming method for a tunnel excavator according to claim 1 or 2, wherein a lubricant is injected into a natural ground region extending between the outer peripheral surface of the cylindrical body and the plurality of edge cutting rods.
  4. When the plurality of edge cutting rods are penetrated into the natural ground, the traveling direction of the plurality of edge cutting rods is controlled so that the ground natural penetration portions are substantially parallel to the outer peripheral surface of the cylindrical body. The method for resuming excavation of a tunnel excavator according to any one of claims 1 to 3, wherein the excavation is resumed.
  5. A drilling boring machine is disposed in the internal space of the cylindrical body so as to be pivotable around the machine axis or an axis parallel to the machine axis, and is connected to a rotation drive mechanism of the drilling boring machine. A plurality of rod insertion holes through the cylindrical body so as to penetrate from the rear of the inner space of the cylindrical body to the front of the outer space and along the circumferential direction of the cylindrical body; And a hollow rod formed with a grout material discharge hole along the material axis, and a lubricant injection hole penetratingly formed at a position in front of the rod insertion hole in the cylindrical body. Digging machine.
  6. The tunnel boring machine according to claim 5, wherein the drilling boring machine is configured to be able to control a traveling direction of the edge cutting rod.
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Publication number Priority date Publication date Assignee Title
CN105649655A (en) * 2016-03-25 2016-06-08 粤水电轨道交通建设有限公司 Device used for grouting reinforcement from interior of shield tunneling machine to peripheral stratum
CN106522966A (en) * 2016-11-07 2017-03-22 成都建工路桥建设有限公司 Sandy cobble stratum earth pressure balance rectangular shield jacking-tunneling antifriction construction method
CN107013225A (en) * 2017-04-13 2017-08-04 叶晓明 The anti-collapse tunneling shield method of churning water shutoff

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CN105649655A (en) * 2016-03-25 2016-06-08 粤水电轨道交通建设有限公司 Device used for grouting reinforcement from interior of shield tunneling machine to peripheral stratum
CN106522966A (en) * 2016-11-07 2017-03-22 成都建工路桥建设有限公司 Sandy cobble stratum earth pressure balance rectangular shield jacking-tunneling antifriction construction method
CN107013225A (en) * 2017-04-13 2017-08-04 叶晓明 The anti-collapse tunneling shield method of churning water shutoff
CN107013225B (en) * 2017-04-13 2019-03-01 叶晓明 The anti-collapse tunneling shield method of whirl spraying water shutoff

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