JP3811482B2 - Shield tunnel joining method - Google Patents

Description

  The present invention relates to a shield tunnel joining method for joining two shield tunnels formed by excavating simultaneously from two opposite directions in the ground.

  In forming shield tunnels, in recent years, shield shield machines have started from both directions of the tunnel as shield tunnels have become longer, and two shield tunnels formed by these two shield tunnel machines are underground. The method of joining by using this method to complete the tunnel is being carried out. As a joining method when joining such two shield tunnels, there is the following joining method.

  In this joining method, the receiving-side shield machine that has reached the joining position moves the cutter backward, and the space formed by the backward movement of the cutter and the chamber of the receiving-side shield machine is filled with a solidifying agent. Prevent mountain collapse. Thereafter, the entry side shield machine is made to enter the reception side shield machine while the solidifying agent is excavated by the cutter portion of the entry side shield machine that has reached the joining position from the side facing the reception side shield machine. . And after a receiving side shield machine and an entrance side shield machine are wrapped, the outer cylinder part of both shield machine is joined, and a shield tunnel is joined.

As a method for joining shield tunnels using this joining method, for example, there is one disclosed in Japanese Patent Laid-Open No. 3-129090.
JP-A-3-129090

  However, in the above-described shield tunnel joining method, the solidification agent is filled in the space formed by the receiving shield machine and the entire chamber of the receiving shield machine. For this reason, there has been a problem in that a great deal of labor is required for the anchoring work after the entry-side shield machine has entered the receiving-side shield machine. Further, during the excavation work by the entry side shield machine, the solidification agent is filled between the entry side shield machine and the reception side shield machine. For this reason, even if the water supply was formed in the junction part, there was also a problem that this water supply could not be confirmed unless after the dredging work was completed.

  Accordingly, an object of the present invention is to provide a shield tunnel joining method that does not require much labor for dredging of a solidifying agent and that can be easily confirmed even when water supply is formed. .

  A shield tunnel joining method according to the present invention that has solved the above-described problems includes a receiving-side cutter unit and a receiving-side cylinder unit, and the receiving-side cutter unit can be moved backward relative to the receiving-side cylinder unit. A shield that joins the receiving tunnel excavated by the side shield excavator and the entrance tunnel excavated by the entrance shield excavator having an inlet cutter and inlet cylinder smaller in diameter than the receiving cylinder. A method for joining tunnels, in which a step of excavating the ground to a receiving-side tunnel excavation position by a receiving-side shield excavator and a receiving-side cutter unit in the receiving-side shield excavator that has reached the receiving-side tunnel excavation position The process of retreating relative to the tube portion, the process of excavating the ground to the entrance tunnel excavation position opposite the reception tunnel excavation position by the entrance shield excavator, and the receiving tunnel excavation position Side shield digging The entrance side shield machine is entered into the receiving side cylinder part of the machine, and the entrance side cylinder part of the entrance side shield is inserted from the injection hole formed behind the cutting site by the entrance side cutter part in the entrance side shield excavator. And a step of injecting a filler on the outside.

  In the shield tunnel joining method according to the present invention, when the entry-side shield excavator is advanced into the receiving-side cylinder portion of the reception-side shield excavator, it is behind the cutting site by the entry-side cutter portion of the entry-side shield excavator. The filler is injected from the injection hole formed in the outer side of the inlet side cylindrical portion of the inlet side shield. For this reason, a filler is filled between the receiving side cylinder part of the receiving side shield machine and the incoming side cylinder part of the incoming side shield machine, and this filler forms a film, thereby forming the receiving side shield machine. Water can be stopped between the receiving cylinder of the machine and the ground on the outside. Therefore, it is not necessary to fill the inside of the receiving side cylinder portion with the solidifying agent, so that much labor is not required for the dredging work. Moreover, even if a water supply is formed, the confirmation can be easily performed.

  Here, a widening copy cutter is provided in the entry side cutter unit, and the widening copy cutter is widened just before the entry side shield machine enters the receiving side shield machine, and the ground around the entry side shield machine is obtained. And a step of excavating a mountain to form a void and filling the formed void with a filler from an injection hole.

  In this way, the attitude control of the entry side shield machine is good by excavating the natural ground immediately before the entry side shield machine enters the reception side shield machine with the widening copy cutter. Become. However, if a void is formed in the natural ground, there is a concern that the natural ground will loosen, but the strength of the natural mountain can be maintained by filling the void with a filler. Further, by filling the voids with a filler, the water stoppage can be further improved. Further, in adjusting the traveling direction of the entry side shield machine, the travelable area is widened, so that fine adjustment of the traveling direction is facilitated. Accordingly, the entry-side shield machine can be easily entered into the reception-side shield machine.

  In the present invention, “immediately before” refers to a range of about several tens of centimeters before the receiving shield machine.

  In addition, a copy cutter for dredging is provided in the entry side cutter part, and when the entry side shield machine enters the reception side shield machine, the inner surface of the receiving side cylinder part of the reception side shield machine with the copy cutter for dredging It can also be set as the aspect which performs a dredging work.

  Thus, when the entry side shield machine enters the reception side shield machine, it is easy to clean the reception side cylinder part in the reception side shield machine by using the copy cutter. Can do.

  Further, the same copy cutter can be used as the widened copy cutter and the coffin copy cutter.

  Thus, by using the same copy cutter as the widening copy cutter and the copy copy cutter for dredging, it is possible to reduce the number of members provided in the entry side shield machine.

  Moreover, it can be set as the aspect using the entrance side shield machine which the injection hole is formed in the side surface of the entrance side cutter part.

  In this way, by using the entry side shield machine in which the injection hole is formed on the side surface of the entry side cutter part, by rotating the entry side cutter, between the receiving side cylinder part and the entry side cylinder part The filler can be injected evenly in the direction.

  Furthermore, when injecting the filler, the pressure in the receiving cylinder part may be set higher than the soil pressure, and the injection pressure of the filler may be maintained higher than the pressure in the receiving cylinder part.

  Thus, the pressure in the receiving cylinder is set higher than the soil pressure in order to prevent the collapse of the natural ground. By injecting the filler at a pressure higher than the pressure in the receiving cylinder, the filler can be reliably injected.

  And it can also be set as the aspect which performs the ground improvement process of the circumference | surroundings of a receiving side tunnel excavation position, before making an entrance side shield excavation machine approach a receiving side shield excavation machine.

  When the entry-side shield machine is entered, the water stoppage can be further improved by improving the ground around the excavation position of the receiving-side tunnel.

  According to the method for joining shield tunnels according to the present invention, it is possible to easily check even when a water supply is formed without requiring much labor for dredging of the solidifying agent.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each embodiment, portions having the same function are denoted by the same reference numerals, and redundant description may be omitted.

  In the present embodiment, the entry-side tunnel and the reception-side tunnel are excavated from both directions of the tunnel by the entry-side shield excavator and the reception-side shield excavator, respectively, and the two tunnels are joined at a predetermined joining position. Below, an entrance side shield machine is explained. FIG. 1 is a side sectional view of the entry side shield machine, FIG. 2 is a front view thereof, and FIG. 3 is a side sectional view of the reception side shield machine.

  As shown in FIG. 1, the entry-side shield machine 1 includes an entry-side cutter head 10. The entry side cutter head 10 is as shown in FIG. The four cutter spokes 11 are provided, and the cylindrical body 12 is attached along the outer peripheral edge of the four cutter spokes 11. The four cutter spokes 11 are arranged so as to extend radially from the center point, and the angle between each adjacent cutter pork is 90 degrees. Moreover, the cylinder 12 is arrange | positioned so that a center point may come to the same position as the center point where the four cut spokes 11 are arrange | positioned.

  In this embodiment, a cutter head having four cutter spokes is used. However, the number of cutter spokes is not limited to this number, and any number may be used. Further, the cutter head can be a face plate type instead of a spoke type.

  A cutter bit 13 for cutting the face is attached to the front surface of the cutter pork 11 and a dedicated bit 14 is attached. The dedicated bit 14 cuts a reinforcing material made of carbon fiber in an excavable wall provided in a start shaft or a reaching shaft, and is set to be higher than the cutter bit 13. . Note that the dedicated bit 14 may be omitted. Moreover, in the entrance side shield machine 1 which concerns on this embodiment, the advancing direction (FIG. 1 left direction) of the entrance side shield machine 1 is demonstrated before. On the other hand, the receiving-side shield machine 2 will be described with the traveling direction of the receiving-side shield machine 2 (the left direction in FIG. 3) as the front.

  A rotating shaft 15 that is concentric with the cylindrical body 12 is attached to the rear portion of the entry-side cutter head 10. As the entry-side cutter head 10 rotates around the rotation shaft 15, excavation work by the entry-side shield machine 1 is performed while excavating soil in front of the entry-side shield machine 1.

  A partition wall 16 is provided behind the entry-side cutter head 10. For example, muddy water is injected into a front position of the partition wall 16. The earth and sand excavated by the entry side cutter head 10 stays in front of the partition wall 16 together with the muddy water. Further, the partition wall 16 is provided with a screw conveyor 17, and the earth and sand staying at the front position of the partition wall 16 is discharged to the rear outside of the partition wall 16 by the screw conveyor 17.

  Further, the two cutter spokes 11 arranged in a straight line in the entry side cutter head 10 are provided with copy cutters 18 which are widened copy cutters of the present invention that advance and retreat in the radial direction of the entry side cutter head 10. . When the copy cutter 18 advances, a hole having a diameter wider than that of the entry-side cutter head 10 can be excavated. On the other hand, when the copy cutter 18 is retracted, a hole having a diameter of the entry-side cutter head 10 can be excavated. In the present embodiment, the copy cutter 18 also functions as a bag copy cutter.

  Further, in the two cutter spokes 11 where the copy cutter 18 in the entry side cutter head 10 is not provided, a filler injection passage 19 which is an injection hole of the present invention is formed. The filler injection passage 19 is formed behind the cutter bit 13 serving as a cutting site in the entry-side cutter head 10 and communicates with an outlet 20 which is an injection hole of the present invention formed in the cylindrical body 12. The filler supplied via the injection passage 19 is discharged from the outlet formed in the cylindrical body 12 to the side of the entry-side cutter head 10. In this embodiment, the filler injection passage 19 is provided in the cutter pork 11 not provided with the copy cutter 18, but may be provided in the cutter pork 11 provided with the copy cutter 18.

  As the filler, a high-viscosity, high-viscosity material that can form a film by filling a narrow region is used. Specifically, a material that forms a film while maintaining a fluid is used, which is a mixture of a solidifying material, an auxiliary agent, a stabilizer, a thickener, water and the like.

  Behind the entry-side cutter head 10 is provided an entry-side outer cylinder portion 21 which is an entry-side cylinder portion of the present invention. The inlet-side outer cylinder portion 21 is formed of a cylindrical body having the same diameter as the cylinder body 12 in the inlet-side cutter head 10, and an inlet-side tunnel having the same diameter as the outer diameter of the inlet-side outer cylinder portion 21 is formed. On the rear side of the entry-side outer cylinder portion 21, there are provided a not-shown bent jack, a shield jack, an erector, and the like.

  On the other hand, as shown in FIG. 3, the receiving-side shield machine 2 includes a receiving-side cutter head 30 that is a receiving-side cutter unit of the present invention. The receiving-side cutter head 30 is of a face plate type, and a plurality of cutter bits 31 are attached to the front surface thereof. Further, a rotating shaft 32 is provided at the rear portion of the receiving side cutter head 30, and the rotating shaft 32 is connected to the receiving side inner cylinder portion 33.

  Further, a receiving-side outer cylinder portion 34 that is a receiving-side cylinder portion of the present invention is provided behind the receiving-side cutter head 30 and outside the receiving-side inner cylinder portion 33. The receiving-side outer cylinder portion 34 has a diameter that is slightly larger than the receiving-side inner cylinder portion 33. The receiving-side cutter head 30 and the receiving-side inner cylinder portion 33 are formed by using a character shield jack (not shown) or the like. The receiving-side outer cylinder portion 34 can be retracted relatively.

  Further, on the outer side in the circumferential direction of the receiving-side cutter head 30, an expansion / contraction spoke 35 that is extendable along the radial direction of the receiving-side cutter head 30 is provided. The cutter bit 31 is also attached to the expansion / contraction spoke 35, and in a state where the expansion / contraction spoke 35 is extended, a reception side shield having the same diameter as the reception side outer cylinder portion 34 can be excavated. While the receiving side tunnel is being dug, the receiving side tunnel having the same diameter as the outer diameter of the receiving side outer cylindrical portion 34 is formed by extending the telescopic spoke 35.

  Further, in a state where the expansion / contraction spokes 35 are contracted, the diameter of the receiving side cutter head 30 including the expansion / contraction spokes 35 is smaller than the inner diameter of the receiving side outer cylinder portion 34. For this reason, when the expansion / contraction spoke 35 is in a contracted state, the receiving-side cutter head 30 can enter the receiving-side outer cylindrical portion 34.

  In addition, behind the receiving side inner cylinder part 33 in the receiving side shield machine 2, the folding jack which is not shown in figure, a shield jack, an erector, etc. are provided. Further, the outer diameter of the entry-side outer cylinder portion 21 in the entry-side shield machine 1 is set smaller than the inner diameter of the reception-side outer cylinder portion 34 in the reception-side shield machine 2. For this reason, the entry-side shield machine 1 can enter the inside of the reception-side outer cylinder portion 34 in the reception-side shield machine 2. Further, the front side of the receiving-side inner cylinder part 33 functions as a partition wall, and muddy water or the like is filled in front of the receiving-side inner cylinder part 33 during excavation.

  A method for joining shield tunnels according to this embodiment using the shield machine having the above configuration will be described.

  In constructing a shield tunnel, an entrance-side shield machine 1 is used to excavate and form an entrance-side tunnel from one of the constructed tunnels, and a receiver-side shield machine 2 is used to form a receive-side tunnel. The entrance-side shield machine 1 and the reception-side shield machine 2 excavate the entrance-side tunnel and the receiver-side tunnel to the joining position, respectively, and then the two tunnels are joined.

  When performing the joining operation, first, as shown in FIG. 4A, the receiving side tunnel engraving machine 2 excavates the receiving side tunnel to the joining position. At this time, the entrance-side shield machine 1 is still in a state where it does not reach the joining position. In the receiving side shield machine 2, preparation for joining work is performed before the entrance side shield machine 1 reaches the joining position.

  As a preparatory work, the receiving cutter head 30 is made to enter the receiving outer cylinder portion 34, and a space formed by excavation by the receiving cutter head 30 is filled with a material having thixotropy. For this reason, the telescopic spokes 35 in the receiving cutter head 30 that have been stretched during excavation are contracted, and the diameter of the receiving cutter head 30 is made smaller than the inner diameter of the receiving outer cylinder portion 34.

  In this state, the receiving side cutter head 30 is moved backward together with the receiving side inner cylinder portion 33, and the receiving side cutter head 30 is moved backward using a shield jack or the like (not shown). Then, as shown in FIG. 4B, the receiving-side cutter head 30 enters the receiving-side outer cylindrical portion 34. Further, in a state before the receiving-side cutter head 30 is moved backward, the muddy water filled in front of the receiving-side inner cylinder portion 33 is filled in the space formed by moving the receiving-side cutter head 30 backward. Become. Therefore, the space does not become a solidified state, and the fluidized state is maintained.

  Thus, while the preparation for the joining work is being performed, the entry-side tunnel excavation by the entry-side shield machine 1 proceeds, and eventually the entry-side shield machine 1 immediately before the joining position, for example, the tip of the receiving tunnel. It reaches the position of 50 cm from the part. When the entry-side shield machine 1 reaches the position immediately before the joining position, as shown in FIG. 5A, the copy cutter 18 is advanced, and the entry-side shield machine 1 is dug in this state. By advancing the copy cutter 18, the diameter of the entrance side tunnel to be excavated is slightly increased.

  In the entrance side shield machine 1, as shown in FIG. 5B, the copy cutter 18 is advanced, and the filler F is supplied to the outlet 20 through the filler injection passage 19, and filling is performed from the outlet 20. The agent F is discharged. If the digging by the entry-side shield machine 1 is continued with the copy cutter 18 advanced, a gap corresponding to the width from which the copy cutter 18 protrudes is formed outside the entry-side outer cylinder portion 21. Filler F discharged from the outlet 20 is filled in the gap.

  In this way, by expanding the width of the entrance tunnel using the copy cutter 18, for example, even when the relative positions of the entrance shield machine 1 and the receive shield machine 2 are misaligned, the direction correction can be performed. It can be done easily. Further, by filling the gap with the filler F, the water stoppage at the joining position of the entry side shield machine 1 and the reception side shield machine 2 can be improved.

  Furthermore, when the digging by the entry side shield machine 1 is continued, the entry side cutter head 10 of the entry side shield machine 1 reaches the gap formed by the reception side shield machine 2. When the entry side shield machine 1 is further advanced, the entry side shield machine 1 eventually reaches the position just before entry into the reception side outer cylindrical portion 34 of the reception side shield machine 2. When the position just before entry is reached, the copy cutter 18 is slightly retracted, and the amount of protrusion is such that the tip of the protruding portion of the copy cutter 18 slides on the inner side surface of the receiving-side outer cylinder portion 34 in the receiving-side shield machine 2. To do.

  When the entry-side shield machine 1 is further advanced in this state, the entry-side cutter head 10 in the entry-side shield machine 1 receives the reception-side outer cylinder in the reception-side shield machine 2 as shown in FIG. Enter part 34. At this time, the copy cutter 18 in the entry side shield machine 1 is slid along the inner side surface of the reception side outer cylinder part 34 in the reception side shield machine 2. By this copy cutter 18, the inner surface of the receiving-side outer cylinder portion 34 in the receiving-side shield machine 2 is subjected to dredging work.

  Further, while the dredging operation is performed, the filler F is discharged from the outlet 20 of the filler injection passage 19 in the entry side shield machine 1. The filler F discharged from the outlet 20 is formed between the receiving-side outer cylinder portion 34 of the receiving-side shield machine 1 and the inlet-side cutter head 10 of the receiving-side shield machine 1 as the incoming-side shield machine 1 advances. Filled in between.

  Here, when the filler F is injected, the injection pressure of the filler F is set higher than the pressure in the receiving-side outer cylinder portion 34. The pressure in the receiving side outer cylinder part 34 is set higher than the soil pressure so that the earth and sand in the ground may not collapse and flow into the receiving side outer cylinder part 34. Moreover, when the injection pressure of the filler F is lower than the pressure in the receiving side outer cylinder part 34, it will become difficult to inject the filler F. For this reason, the injection pressure of the filler F is set higher than the pressure in the receiving-side outer cylinder part 34.

  Thus, when the filler F is filled between the receiving-side outer cylinder portion 34 and the entry-side cutter head 10, the filler F forms a film between the receiving-side outer cylinder portion 34 and the entry-side cutter head 10. I will do it. With this film, the water stoppage between the receiving-side outer cylinder part 34 and the ground in the outside can be enhanced.

  The outlet 20 of the filler injection passage 19 is formed in the cylindrical body 12 of the entry side cutter head 10. For this reason, by rotating the entry side shield head 1 while rotating the entry side cutter head 10, the filler F is evenly distributed over the entire circumferential direction between the receiving side outer cylinder portion 34 and the entry side cutter head 10. Can be filled.

  Thus, after the entry-side cutter head 10 in the entry-side shield machine 1 has entered the reception-side outer cylinder part 34 in the reception-side shield machine 2, the entry length becomes 5 to 10 cm. The advancement of the shield machine 1 is interrupted, and the entrance shield machine 1 is stopped. In this state, the filler F is injected from the outlet 20 of the filler injection passage 19 for a while. By injecting the filler F at this time, the water-stopping property between the receiving-side outer cylinder portion 34 of the receiving-side shield machine 2 and the ground in the outside is increased, and the water-stopping is ensured.

  The entrance side shield machine 1 is advanced while performing the dredging work and injecting the filler F as it is, and as shown in FIG. 6B, the entrance side cutter head 10 and the reception side shield of the entrance side shield machine 1 The receiving side cutter head 30 of the excavating machine 2 is moved to a position that is close to and opposite to the receiving side cutter head 30. When the entry side shield machine 1 is advanced to this position, the entry side shield machine 1 is stopped. In this way, the receiving side tunnel and the incoming side tunnel are joined.

  After the tunnel is joined, the receiving-side cutter head 30 and the receiving-side inner cylinder 33 of the receiving-side shield machine 2 are removed, and the incoming-side cutter head 10 and the bulkhead 16 of the incoming-side shield machine 1 are removed. By removing, the receiving side tunnel and the incoming side tunnel are made to communicate with each other. In this way, the tunnel formed by the entry-side shield machine 1 and the reception-side shield machine 2 can be joined under reliable water stoppage.

  Further, in the shield tunnel joining method according to the present embodiment, since the inside of the receiving shield is not solidified as in the conventional CID method, it does not require much labor for dredging of the solidifying agent. Even when a water supply is formed in a mountain, it can be confirmed easily.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, after the receiving-side shield machine 2 arrives at the joining position, the ground is improved by injecting a chemical solution around the joining position, and then the entrance-side tunnel and the receiving-side tunnel are joined. You can also.

  In the above-described embodiment, the copy cutter 18 is used as the widened copy cutter and the cocoon copy cutter. However, these can be provided separately as dedicated ones. Furthermore, in the above embodiment, before the entry-side shield machine enters the receiving-side shield machine 2, the ground is excavated with a copy cutter, but the excavation using the copy cutter is omitted here. You can also.

  On the other hand, in the above-described embodiment, the filler injection passage 19 and the outlet 20 thereof are provided in the entry-side cutter head 10, but the filler injection passage (injection pipe) is provided behind the entry-side cutter head 10 (partition wall 16 side). It can also be set as the aspect provided.

It is a sectional side view of an entrance side shield machine. It is a front view of an entrance side shield machine. It is a sectional side view of a receiving side shield machine. It is process drawing explaining the joining process of an entrance side tunnel and a receiving side tunnel. It is process drawing which shows the process following FIG. FIG. 6 is a process diagram illustrating a process following the process in FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Entry side shield machine 2 ... Reception side shield machine 10 ... Entry side cutter head 11 ... Cutter pork 12 ... Cylindrical body 13 ... Cutter bit 14 ... Dedicated bit 15 ... Rotating shaft 16 ... Bulkhead 17 ... Screw conveyor 18 ... Copy Cutter 19 ... Filler injection passage 20 ... Outlet 21 ... Inlet side outer cylinder part 30 ... Receiving side cutter head 31 ... Cutter bit 32 ... Rotating shaft 33 ... Receiving side inner cylinder part 34 ... Receiving side outer cylinder part 35 ... Retractable spoke F …filler

Claims (7)

A receiving-side tunnel comprising a receiving-side cutter part and a receiving-side cylinder part, wherein the receiving-side cutter part is excavated by a receiving-side shield machine that is configured to be able to retreat relative to the receiving-side cylinder part;
A joining method of a shield tunnel that joins an entrance tunnel excavated with an entrance shield excavator having an entrance cutter and an entrance cylinder having a smaller diameter than the receiving cylinder,
Excavating the ground to the receiving tunnel excavation position by the receiving shield machine,
Retreating the receiving-side cutter part in the receiving-side shield machine that has reached the receiving-side tunnel excavation position relative to the receiving-side tube part;
Excavating the ground to the entry side tunnel excavation position opposite to the reception side tunnel excavation position by the entry side shield machine;
From the entry-side tunnel excavation position, the entry-side shield excavator is advanced into the receiving-side cylinder portion of the reception-side shield excavator, and behind the cutting site by the entry-side cutter portion in the entry-side shield excavator A step of injecting a filler from the injection hole formed on the outside of the entrance side cylindrical portion of the entrance side shield;
A method for joining shield tunnels, comprising: A widening copy cutter is provided in the entry side cutter part,
The widening copy cutter is widened immediately before the entry-side shield machine enters the receiving-side shield machine, and a space is formed by excavating natural ground around the entry-side shield machine. Filling the voids with the filler from the injection hole;
The method for joining shield tunnels according to claim 1, further comprising: The entrance cutter unit is provided with a copier copy cutter,
3. When the entry-side shield machine enters the receiving-side shield machine, the inner copy side of the receiving-side cylinder portion of the receiving-side shield machine is dredged with the copy cutter for dredging. The shield tunnel joining method described.   The method for joining shield tunnels according to claim 3, wherein the same copy cutter is used as the widened copy cutter and the bag copy cutter.   The method for joining shield tunnels according to any one of claims 1 to 4, wherein an entrance shield engraving machine in which the injection hole is formed on a side surface of the entrance cutter is used.   When inject | pouring the said filler, the pressure in the said receiving side cylinder part is made higher than the soil pressure, and the injection pressure of the said filler is maintained higher than the pressure in the said receiving side cylinder part. The shield tunnel bonding method according to any one of 5.   The shield according to any one of claims 1 to 6, wherein a ground improvement process is performed around the receiving-side tunnel excavation position before the entry-side shield excavating machine enters the receiving-side shield excavator. Tunnel joining method.

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