JP4726697B2 - Ground excavation method - Google Patents

Description

  The present invention relates to a ground excavation method.

  Conventionally, high-level radioactive wastes and the like have been buried in a branch tunnel formed in the bedrock in the deep underground. In order to form a branch mine, a main shaft (horizontal mine) was excavated using a vertical shaft excavated from the surface to the deep underground, and a branch mine was excavated using the main shaft.

  For excavation of a vertical shaft, a tunnel excavator (for example, see Patent Document 1) that can excavate from below to above or obliquely below, and transports excavation gaps from below to above by capsules has been used. Moreover, for excavation of a branch mine, a tunnel excavator (see, for example, Patent Document 2) that can rotate horizontally in a main mine has been used.

JP 2003-328688 A JP 2002-106289 A

  However, the conventional method requires different excavators for excavating the vertical shaft and for excavating the horizontal shaft. Further, the above-described tunnel excavator for shafts has a large-scale facility because a large-capacity excavation storage unit is installed in the excavator.

The present invention for achieving the above-mentioned object includes a step a for excavating a shaft using the first tunnel boring machine , a step b for excavating a horizontal shaft having a predetermined length from the vicinity of the lower end of the shaft, A step c for carrying a cutter head of a second tunnel boring machine into the horizontal pit from above the shaft, a part of the front trunk and the thrust jack of the first tunnel boring machine are removed, and the removed part is removed from the shaft and the horizontal mine and is flips lifting to a height that branches draw the horizontal mine, and step d assembling the second tunnel boring machine is assembled in the rear of the cutter head, the first tunnel boring machine while pulling the trailing bogie in the horizontal downhole, using said second tunnel boring machine and the subsequent carriage A drilling method of the ground, characterized by comprising a step e further drilling Hiraana, the.

A part of the front cylinder to be removed from the first tunnel boring machine in step d is, for example, installed on the outer periphery of the cutter head support, the cutter head driving motor installed behind the cutter head support, and the cutter head support. And a first front side support. When the diameter of the vertical shaft is larger than the diameter of the horizontal shaft, in step d , the second front side support arranged outside the first front side support in the front trunk is left in the first tunnel boring machine. .

Step d draws a horizontal downhole remove a portion of the front body consists of a step f to be connected to the cutter head, draw a horizontal downhole remove the thrust jack, a step g of connecting to a portion of the front torso.

The succeeding carriage is composed of a plurality of carriages, and between the steps a to d , the plurality of carriages are connected and suspended in the shaft. In step e , the operation of lowering the connected carts and the operation of horizontally moving the carts by separating the bottom carts are repeatedly drawn into the horizontal pit.

  In the present invention, a shaft is first excavated using the first excavator, and then a horizontal shaft having a predetermined length is excavated from the vicinity of the lower end of the shaft. Then, the cutter head of the second excavator is carried into the horizontal shaft from above the shaft. Next, a part of the front trunk of the first excavator and the thrust jack are removed and pulled into the horizontal pit to assemble the second excavator. Thereafter, the horizontal pit is further excavated using the second excavator and the subsequent carriage while the subsequent carriage of the first excavator is drawn into the horizontal pit.

  According to the present invention, it is possible to provide a ground excavation method for continuously excavating vertical shafts and horizontal shafts having different diameters using a minimum amount of equipment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a process of excavating a shaft 3 in the ground 1 using a tunnel boring machine (hereinafter referred to as TBM), and FIG. 2 is a cross-sectional view of the shaft TBM 5. 2A is a cross-sectional view taken along line BB in FIG. 2B, and FIG. 2B is a cross-sectional view taken along line A-A in FIG.

  In FIG. 1, the vertical shaft 3 is excavated from above the ground 1 downward using the vertical shaft TBM 5 and the subsequent carriage 55. As shown in FIG. 2, the vertical shaft TBM 5 includes a cutter head 7, a front trunk 13, a middle trunk 15, and a rear trunk 17.

The cutter head 7 has a disk cutter 9 and a disk cutter 11 for excavating the ground 1.

  The front barrel 13 includes a cutter head support 19, a skin plate 20, an oil pack type front side support 21, a cutter head driving motor 25, and the like inside a skin plate 31a.

The cutter head support 19 is disposed behind the cutter head 7. The skin plate 20 is provided outside the cutter head support 19. The diameter of the skin plate 20 is set according to the diameter of the horizontal shaft TBM 53 shown in FIG. The oil pack type front side support 21 is a first front side support and is fixed to the skin plate 20. The cutter head driving motor 25 is fixed behind the cutter head support 19.

The front trunk 13 has a hydraulic jack type front side support 23 on a skin plate 31a. The hydraulic jack type front side support 23 is a second front side support and is disposed outside the oil pack type front side support 21. The hydraulic jack type front side support 23 is fixed to the skin plate 31a.

  The middle barrel 15 has a thrust jack 27 inside the skin plate 31b. The thrust jack 27 is disposed behind the hydraulic jack type front side support 23.

The rear trunk 17 has a gripper 29 on the skin plate 31c. The gripper 29 is fixed to the skin plate 31c.
The thrust jack 27 has one end fixed to the front cylinder 13 and the other end fixed to the rear cylinder 17.

  The shaft TBM 5 excavates the ground 1 by driving the cutter head 7 with the cutter head driving motor 25. The vertical shaft TBM 5 overhangs the gripper 29 and the hydraulic jack type front side support 23 from the skin plate 31 c and the skin plate 31 a in the outer circumferential direction and presses them against the wall surface of the vertical shaft 3 to take a reaction force. The shaft TBM 5 is propelled downward by causing the front barrel 13 and the rear barrel 17 to approach and separate from each other by a thrust jack 27.

  The excavation gap by the cutter head 7 is discharged rearward or upward by a bucket conveyor (not shown) provided inside the vertical shaft TBM 5, and is discharged to the ground using a pneumatic capsule type earthing facility (not shown). Be transported.

  The succeeding carriage 55 is obtained by connecting a plurality of carriages up and down. The trailing carriage 55 is suspended in the shaft 3 and used for transporting the spray material of the shaft 3 and the like.

  FIG. 3 is a diagram illustrating a process of excavating a horizontal pit 33 having a predetermined length. In FIG. 3, a horizontal shaft 33 having a predetermined length is excavated from the vicinity of the lower end of the shaft 3 excavated in the process shown in FIG. Then, the horizontal pit TBM assembly start frame 35 is installed in the horizontal pit 33. In the process shown in FIG. 3, the horizontal pit 33 is excavated to a length in which the horizontal pit TBM can be assembled.

  FIG. 4 is a diagram illustrating a process of carrying in the horizontal well TBM cutter head 37. In FIG. 4, as shown by an arrow C, a horizontal pit TBM cutter head 37 is carried into the horizontal pit 33 from the ground via the vertical shaft 3, and installed on the horizontal pit TBM assembly starter base 35. Moreover, the hood part 39 is carried into the horizontal well 33 from the ground via the vertical shaft 3 and attached to the cutter head 37 for the horizontal well TBM.

  FIG. 5 is a cross-sectional view of the horizontal shaft TBM 53. 5A is a cross-sectional view taken along line HH in FIG. 5B, and FIG. 5B is a cross-sectional view taken along line GG in FIG. 5A.

  As shown in FIG. 5, the horizontal shaft TBM 53 includes a cutter head 37, a hood portion 39, a front drum 43, a middle drum 45, a rear drum 47, and a tail portion 49. The cutter head 37 has a disk cutter 41 for excavating the ground 1.

  FIG. 6 is a diagram showing a process of removing a part of the front trunk 13 of the vertical shaft TBM 5 and drawing it into the horizontal shaft 33. In FIG. 6, first, the cutter head support 19, the oil pack type front side support 21, the cutter head drive motor 25, and the skin plate 20 (FIG. 2) are removed from the front trunk 13 of the shaft TBM 5 in an integrated state.

Next, the removed portion is lifted up to a height at which the vertical shaft 3 and the horizontal shaft 33 are branched as indicated by an arrow D, and inverted at a position indicated by a dotted line as indicated by an arrow E. Then, as shown by the arrow F, it is drawn into the horizontal pit 33 and assembled behind the cutter head 37. The hydraulic jack type front side support 23 which is the second front side support of the shaft TBM 5 is left in the front trunk 13.

As shown in FIG. 5A, the cutter head support 19, the oil pack type front side support 21, the cutter head drive motor 25, and the skin plate 20 form a front trunk 43 of the horizontal well TBM 53.

  FIG. 7 is a diagram showing a process of removing the thrust jack 27 of the vertical shaft TBM 5 and drawing it into the horizontal shaft 33. In FIG. 7, the thrust jack 27 in the middle trunk 15 of the shaft TBM 5 is removed. Then, as indicated by an arrow I, the thrust jack 27 is lifted in the vertical shaft 3, pulled into the horizontal shaft 33, and disposed behind the cutter head support 19.

FIG. 8 is a diagram showing a process of assembling the middle drum 45, the rear drum 47, and the tail portion 49 of the horizontal shaft TBM 53. As shown in FIG. In FIG. 8, the middle trunk 45, the rear trunk 47, and the tail portion 49 are carried from the ground through the vertical shaft 3 into the horizontal shaft 33 and assembled. The skin plate 51 (FIG. 5) of the middle drum 45, the rear drum 47, and the tail portion 49 is carried in two divided vertically.
As shown in FIG. 5A, one end of the thrust jack 27 is fixed to the front barrel 43 and the other end is fixed to the rear barrel 47.

FIG. 9 is a diagram illustrating a process of further excavating the horizontal well 33 using the trailing carriage 55 and the horizontal well TBM 53. In FIG. 9, the horizontal shaft 33 is further excavated by using the horizontal shaft TBM 53 and the subsequent vehicle 55 while the subsequent vehicle 55 of the vertical shaft TBM 5 used when excavating the shaft 3 is drawn into the horizontal shaft 33.

In order to draw the succeeding carriage 55 suspended in the shaft 3 into the horizontal well 33 in the process shown in FIGS. 1 to 8, the operation of lowering the plurality of connected carriages and the bottom carriage 55a are separated. Repeat the horizontal movement. The trailing carriage 55 is used for transporting the spray material of the horizontal pit 33 and the like.

  The horizontal shaft TBM 53 excavates the ground 1 by driving the cutter head 7 with the cutter head driving motor 25. The horizontal well TBM 53 projects the oil pack type front side support 21 from the skin plate 20 in the outer peripheral direction and presses it against the wall surface of the horizontal well 33 to take a reaction force. The horizontal shaft TBM 53 is propelled forward by moving the front trunk 43 and the rear trunk 47 closer to and away from each other by the thrust jack 27.

  The excavation gap by the cutter head 37 is discharged to the rear of the machine body by a belt conveyor (not shown) or the like provided inside the horizontal shaft TBM 53.

  Thus, according to this embodiment, the cutter head support 19, the oil pack type front side support 21, the cutter head drive motor 25, the skin plate 20, and the thrust jack 27 of the vertical shaft TBM 5 are diverted to the horizontal shaft TBM 53. In addition, a pneumatic capsule type earthing facility is used to carry out the excavation sludge. Thereby, the shaft 3 and the horizontal shaft 33 having different diameters can be continuously excavated with the minimum equipment.

  The preferred embodiments of the ground excavation method according to the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

The figure which shows the process of excavating the shaft 3 in the ground 1 using a tunnel boring machine Cross section of TBM5 for shaft The figure which shows the process of excavating the horizontal well 33 of predetermined length The figure which shows the process of carrying in the cutter head 37 for horizontal well TBM. Cross section of horizontal shaft TBM53 The figure which shows the process of removing a part of the front trunk | drum 13 of TBM5 for vertical shafts, and drawing in in the horizontal shaft 33 The figure which shows the process of removing the thrust jack 27 of TBM5 for vertical shafts, and drawing in in the horizontal shaft 33 The figure which shows the process of assembling the center drum 45, the rear drum 47, and the tail part 49 of TBM53 for horizontal shaft The figure which shows the process of further excavating the horizontal well 33 using the succeeding trolley | bogie 55 and TBM53 for horizontal wells.

Explanation of symbols

1 ……… Ground 3 ……… Vertical shaft 5 ……… TBM for vertical shaft
7, 37 ......... Cutter head 13, 43 ......... Front trunk 19 ......... Cutter head support 20, 31, 51 ... …… Skin plate 21 ... …… Oil pack type front side support 23 ... …… Hydraulic jack type front Side support 25 ... …… Cutter head drive motor 27 ……… Thrust jack 29 ……… Gripper 33 ……… Horizontal well 53 ……… Horizontal well TBM
55 ……… Following cart 55a ……… Dolly

Claims (5)

A step of excavating a shaft using the first tunnel boring machine ;
A step b of excavating a horizontal shaft having a predetermined length from the vicinity of the lower end of the shaft;
A step c of bringing a cutter head of a second tunnel boring machine into the horizontal shaft from above the vertical shaft;
A part of the front trunk and the thrust jack of the first tunnel boring machine are removed, the removed part is lifted up to a height at which the vertical shaft and the horizontal shaft are branched, inverted , and drawn into the horizontal shaft . a step d assembling the second tunnel boring machine are assembled to the rear,
A step e of further excavating the horizontal pit using the second tunnel boring machine and the subsequent carriage while pulling the subsequent carriage of the first tunnel boring machine into the horizontal pit;
The ground excavation method characterized by comprising. A part of the front torso
With cutter head support,
A cutter head driving motor installed behind the cutter head support;
A first front side support installed on the outer periphery of the cutter head support;
The ground excavation method according to claim 1, comprising: The second front side support disposed outside the first front side support in the front trunk is left in the first tunnel boring machine in the step d. How to excavate the ground. Step d is
The pull in a horizontal downhole remove a portion of the front torso, a step f to be connected to the cutter head,
The pull on the horizontal downhole Remove the thrust jacks, a step g of connecting to a portion of the front torso,
The ground excavation method according to claim 1, comprising: The subsequent carriage is composed of a plurality of carriages,
Between the step a to the step d , the plurality of carriages are connected and suspended in the shaft,
The step e is characterized in that in the step e , the operation of lowering the connected carts and the operation of horizontally moving the carts by separating and moving the lowest carts are drawn into the horizontal shaft. The ground excavation method according to 1.

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