JP3172433B2 - Oblique starting method of the shaft excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for starting an inclined shaft excavator for digging an inclined shaft diagonally upward from an already built horizontal shaft.

[0002]

2. Description of the Related Art Conventionally, in order to excavate an inclined shaft such as a hydraulic pipeline of a hydroelectric power plant in mountainous ground, for example, as shown in FIGS. (Referred to as an existing horizontal shaft), a carriage 41 carrying a shaft excavator C is transported on a rail R laid on the bottom surface of the horizontal shaft A and transported, and then the shaft excavator C is moved diagonally upward. The tilting excavator C is started. At this time, it is necessary to tilt the inclined shaft excavator C in the inclined shaft excavation direction.

[0003] Therefore, in the conventional method, a starting inclined shaft part D having a certain depth is excavated diagonally upward from the horizontal shaft A toward the inclined shaft B side to be excavated, and then a pulley block 42 is provided on the inner bottom surface of the starting inclined shaft part D. And pulleys 43, and pulleys 44 and 45 are attached to the front end of the shaft excavator C and the bottom of the horizontal shaft A,
In addition, a winch 46 is installed on the rear side,
Pulleys 43 and 45 hang a rope 47 between the pulley 44 of the inclined shaft excavator C transported to and the pulley block 42 on the starting inclined shaft section D side.
Shaft excavator C
Is lifted obliquely upward, and the front end thereof is inserted into the starting inclined shaft part D, and thereafter the inclined shaft excavator C is started.

[0004]

However, according to the above-described method and means for starting the inclined shaft excavator C, the pulley block 42 and the pulley 43 are attached to the starting inclined shaft portion D, and the inclined shaft excavator C is connected to the horizontal shaft. Not only does the work of attaching the pulleys 44 and 45 to A take considerable labor and labor, but also the descent of the shaft excavator C becomes unstable during the pulling operation with a rope, which poses a danger to the work and increases the work efficiency. Problems such as a decrease in Further, after the start preparation is completed with the inclined shaft excavator C facing the start inclined shaft part D side, there is a problem that it is difficult to remove the pulley block 42 and the pulley 43 in the start inclined shaft part D. .

The present invention has been made in view of such problems, and an object of the present invention is to automatically and efficiently mount an inclined excavator from an existing horizontal pit in an efficient and stable posture at a predetermined angle. It is an object of the present invention to provide a method for starting an inclined excavator that can be started obliquely.

[0006]

In order to achieve the above object, a method of starting a skew of a shaft excavator according to the present invention is to receive a rear end side of a shaft excavator at a bottom of a tunnel at a position where a shaft is excavated in a horizontal shaft. After excavating and forming a recess, and after forward-transferring in a horizontal mine until the center of the frame base equipped with the inclined shaft excavator reaches the opening front edge of the recess, the inclined shaft excavator mounting frame is moved to the opening front end. The inclined shaft excavator mounting frame is received by the bottom of the concave by tilting the shaft as a rotation center toward the concave side, and the inclined shaft excavator is inclined upward and forward, and obliquely forward from the opening front end of the concave. After fixing the first half of the frame base protruding toward, the inclined shaft excavator is started along the frame base.

[0007] In the above-described method of starting the oblique excavation machine,
In the invention described in claim 2, the opening length of the recess in the horizontal shaft length direction is longer than a half length of the inclined shaft excavator, and a horizontal frame is bridged over the opening of the recess, Further, pin support members are fixed to both sides of the front end of the opening of the recess, and after passing the front half of the mounting frame of the inclined shaft excavator over the horizontal frame, the horizontal frame is removed, and the pin support member is framed by the frame. The two sides of the central part in the length direction of the platform are connected by pins, and then the frame base is rotated around this pin to receive the shaft shaft excavator mounting frame base on the bottom of the recess, so that Is inclined upward in the forward direction.

According to a third aspect of the present invention, there is provided a method for fixing a frame base in the above method, wherein the concave portion is provided at a rear portion of a face of a horizontal pit, and an inclined shaft excavator is provided in the concave portion. After being supported in the state of being inclined upward toward the front, the space between the lower surface and the face of the front half of the shaft shaft excavator frame that protrudes obliquely upward from the front end of the opening of the recess toward the front It is characterized by placing and filling concrete and fixing the frame base.

[0009]

[Function] After placing a shaft excavator on the frame at the back side of the horizontal pit, it is transported from the horizontal shaft to the position of the shaft excavation, and excavated on the front edge of the opening of the recess excavated on the bottom of the tunnel. Make sure that the center of the frame on which the machine is mounted is positioned. From this state, when the frame base of the shaft excavator is tilted with the front edge of the opening of the recess as a fulcrum, the central portion of the shaft excavator is located on the front end of the opening of the recess, and the frame is driven by a small tilting power. The platform tilts integrally with the shaft excavator, and the rear half of the frame base is immersed in the recess, and the shaft excavator is installed in a state of being inclined obliquely upward toward the front.

In order to tilt the frame base on which the shaft excavator is mounted as described above, pin support members are fixed to both sides of the front end of the opening of the recess, and the pins are inserted through the pin support members. By pivoting the pins on both sides of the central part of the frame of the shaft excavator in the longitudinal direction, the shaft of the shaft can be operated with a small biasing force in the tilting direction, making the frame of the shaft shaft excavator light and easy. And it tilts accurately. Then, the shaft shaft excavator mounting frame is received on the bottom surface of the recess, and the shaft shaft excavator is inclined forward and upward. In addition, as means for tilting the mounting frame of the shaft shaft excavator, a pulley with a wire wrapped around an appropriate position of the horizontal shaft is attached, and one end of the wire is connected to the shaft shaft excavator, and the other end is pulled. The operation can be easily performed.

The starting angle of the inclined shaft excavator with respect to the horizontal shaft is set by the angle of the front inclined frame portion of the support frame supporting the rear half of the inclined shaft excavator mounting frame, and the front half of the inclined shaft excavator mounting frame is a concave portion. From the front edge of the opening, and projects in the upward direction, that is, in the starting direction of the shaft excavator. Next, the gantry mounting frame is fixed in the above-mentioned inclined state. The fixing means may be a fixing member fixedly attached to the inclined lower surface of the frame base by casting concrete on the inclined lower surface side of the frame base projecting from the recess.

After the shaft excavator is installed in the direction of the shaft excavation in this way, the shaft excavator is started using the frame sloping in the direction of the shaft excavator starting as a guide, and the shaft is excavated obliquely upward from the horizontal shaft. It goes.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawings, a specific embodiment of the present invention will be described with reference to the drawings. In FIG. The shaft is excavated diagonally upward. The inclined shaft excavator C is installed by the starting device from the inclined shaft excavator starting position in the horizontal shaft A to the inclined shaft B side to be excavated. The starting device includes a shaft shaft excavator mounting frame 1 and a recess 4 for inclining the shaft shaft excavating machine frame 1 in a shaft shaft excavation direction.

As shown in FIG. 1 and FIG. 2, the frame shaft excavator mounting frame 1 is provided with a horizontal frame base 1a for mounting the shaft excavator C and supporting the lower peripheral surface of the shaft excavator C over its entire length. And a vertical frame 1b for receiving the back (rear) of the shaft excavator C,
The vertical frame base 1b is integrally fixed at the lower end to the rear end of the horizontal frame base 1a, and stands upright at a right angle upward from the horizontal frame base 1a. The width of the horizontal frame portion 1a of the frame frame 1 is
And a narrow bar-shaped holding frame member 2 formed on both sides of the upper surface thereof with a concave arc surface 2a for supporting both sides of the lower peripheral portion of the excavator C. 2 and a pin locking hole in the center of the holding frame members 2 and 2 in the longitudinal direction, that is, on the outer upper surface at both sides of the center of gravity of the frame base 1 on which the inclined shaft excavator C is mounted. The protruding piece 3 piercing 3a is integrally attached. On the other hand, the vertical frame
The width and length (height) of 1b are formed substantially equal to the diameter of the shaft excavator C.

The recess 4 is formed by excavating the bottom of the tunnel at the start position of the shaft excavator C. The opening at the upper end is rectangular and the front and rear excavation walls have side surfaces V of the inclined walls 4a and 4b. It has a width dimension whose opening width corresponding to the tunnel length direction of the upper end opening is equal to or slightly larger than half the length of the shaft excavator C,
The opening width corresponding to the width direction of the tunnel is formed larger than the diameter of the shaft excavator C. Further, front and rear inclined frame portions 5a and 5a of a V-shaped support frame 5 having the same shape as the side surface shape of the concave portion 4 are provided on front and rear inclined wall surfaces 4a and 4b of the concave portion 4.
5b are leveled in the mounted state and fixed via the concrete layer 6.

The front and rear inclined frame portions 5a and 5b of the support frame 5 are continuous at right angles, and the inclined length of the front inclined frame portion 5a is formed substantially equal to half the length of the inclined shaft excavator C. And the length is oriented in the direction of the excavation. Accordingly, the rear inclined frame portion 5b is orthogonal to the direction of excavation of the shaft. Further, the front inclined frame portion of the support frame 5 located at the opening front edge of the recess 4
On both sides of the upper end of 5a, pin support members 7, 7 having a pin insertion hole 7a at the center and having a width that allows the frame base 1 to pass therethrough are opposed to each other in a protruding state. The pin insertion hole 7a is formed at a height equal to the height of the pin locking hole 3a. Reference numeral 8 denotes a pin to be inserted and locked from the pin insertion hole 7a into the pin locking hole 3a.

An excavator C for excavating the shaft B is a tunnel excavator called a tunnel boring machine (TBM). As shown in FIG. 3, a cylindrical front body 9 and a rear body 10 are formed. A rotary drive mechanism 12 for the cutter plate 11 is disposed in the front body 9 and a plurality of locations of the front body 9 and the rear body 10 are connected by a thrust jack 13. A front gripper is provided on the peripheral wall of the front body 9 and the rear body 10 at an appropriate interval in the circumferential direction by operating a hydraulic cylinder (not shown) from the inside of the body toward the inclined shaft excavation surface.
14 and a main gripper 15 are provided respectively. Reference numeral 16 denotes a slip-prevention jack which is disposed at a plurality of locations on the inner peripheral surface of the rear trunk portion 10 and is a front end face of a slide-prevention wall D for lining a spreader 16a mounted on the rod end of the excavation wall of the shaft B. To be accepted. In addition, this slip prevention jack
16 is used as a propulsion jack when the ground is bad and the main gripper 15 cannot support the thrust.

The method of excavating the shaft shaft B by starting the shaft shaft excavator C from the shaft shaft excavation position will be described. First, after assembling the shaft shaft excavator C and the shaft shaft excavator mounting frame 1 in the horizontal shaft A, , The shaft excavator C is mounted on the frame 1 and is moved forward to the recess 4 where the shaft B is excavated.
In order to support the weight of the excavator C while supporting the weight of the excavator C, a horizontal frame 17 made of steel is formed in the recess 4.
Of the front and rear inclined walls 4a and 4b.
In place of the horizontal frame 17, the recess 4 may be filled with earth and sand and the recess 4 may be buried, and the earth and sand may be removed when tilting the gantry mounting frame base 1. In addition, the horizontal shaft excavator mounting frame base 1 is moved by laying an appropriate horizontal guide (not shown) on the bottom surface of the tunnel and cutting the surface a of the horizontal shaft A.
A pulley 18 is attached to the lower end of the frame 1, and one end of a wire rope 19 spanned over the pulley 18 is connected to the front end surface of the frame 1 while the other end is pulled by a winch (not shown) or the like. Do by pulling.

The frame support 1 of the shaft excavator reaches above the recess 4, passes the first half thereof over the horizontal frame 17, and the pin support members 7 projecting from both sides of the opening front edge of the recess 4, 7 is stopped at the position where the center of gravity has reached between the pin insertion holes 7a, 7a, and the pin engaging holes 3a, 3a of the protruding pieces 3, 3 protruding on both sides at the position of the center of gravity of the inclined shaft excavator mounting frame 1 are stopped. After the projecting piece 3 and the supporting member 7 are pivotally connected to each other by inserting the pin 8 into the pin insertion holes 7a, 7a of the pin supporting members 7, 7,
To remove. On the face side of the horizontal shaft A that receives the first half of the shaft shaft excavator mounting frame 1, the tunnel length reaching the face surface from the opening front edge of the recess 4 is 1/1 / the length of the shaft shaft excavator C.
The excavation is slightly longer than the second length, and the upper half of the face is formed on an inclined surface from which excavation can be started by the excavator C.

After the center both sides of the shaft frame 1 are pivoted with the pins 8 as described above, the latter half is tilted about the pins 8 in the direction of immersion into the recess 4 as shown in FIG. As shown in FIG. 4, the horizontal frame part 1a of the frame shaft mounting machine 1
Is received on the front inclined frame portion 5a of the side V-shaped support frame 5 in the recess 4, and the rear surface of the vertical frame member 1b is received on the front surface of the rear inclined frame portion 5b of the support frame 5. When stopped, the shaft excavator C is oriented in the direction of the shaft excavation.

As means for inclining the excavator mounting frame 1, pulleys 20 and 21 are mounted on the upper wall surface of the horizontal shaft A above the recess 4 at appropriate intervals in the length direction of the tunnel. One end of each of the wire ropes 22 and 23 is connected to each of the pulleys 20 and 21 at the front and rear ends of the upper peripheral surface of the shaft shaft excavator C, and the other end of the wire ropes 22 and 23 is pulled by a pulling means such as a winch (not shown). Then, the wire rope 22 connected to the front end side of the shaft excavator C is pulled, and the wire rope 23 connected to the rear end side is loosened according to the amount of pulling. These towing means and wire ropes 22 and 23 are removed at an appropriate time before the start of the excavation machine C.

The tilting operation of the frame shaft excavator mounting frame base 1 is as follows.
Even if the center of gravity of the shaft frame 1 is located slightly ahead of the front edge of the opening of the recess 4 and the horizontal frame 17 is removed, the frame frame 1 remains in the horizontal position. However, the center of gravity may be located slightly behind the front edge of the opening of the recess 4. In this case, the excavation of the shaft is performed without using the wire ropes 22 and 23. A pulling means such as a winch is installed on the face side in front of the machine, and a wire rope connected to the front end of the shaft excavator C is towed by this means to maintain the frame 1 of the shaft excavator horizontally. In this state, the horizontal frame 17 was removed, and thereafter, the wire rope was gradually loosened by the traction means, and the rear half of the frame 1 was tilted into the recess 4 using the pin 8 as a fulcrum as described above. Thereafter, the traction means and the wire rope may be removed.

When the rear half of the frame 1 enters the recess 4,
The front half of the frame base 1 projects diagonally upward from the front edge of the opening of the recess 4 toward the front, and in this state, between the inclined lower surface of the front half of the frame base and the face a of the horizontal pit A. Concrete is poured into the space of the frame base and filled, and the inclined upper surface of the fixing member 24 made of the concrete is integrally fixed to the lower surface of the first half of the horizontal frame base 1a of the frame base 1, whereby the frame base 1 is in the inclined state. Fix with. Thereafter, the inclined shaft excavator C is started to excavate the inclined shaft B, and before that, the main grippers 15 of the inclined shaft excavator C are received on the excavation walls on both sides of the horizontal shaft A at the position of the recess 4 beforehand. Reaction force support walls 25, 26 to stop
Is formed.

As shown in FIG. 2, the reaction force supporting walls 25 and 26 are formed into a thick wall 25 by casting concrete on one side of the excavation wall of the horizontal shaft A. The section 25 is configured to provide an excavation waste discharge passage 27 described later. When the ground of the horizontal shaft A is a hard rock that can support the reaction force of the main gripper 15, the other reaction force support wall 26 is not necessarily provided.

In order to excavate the shaft B by the shaft excavator C, the main grippers 15, 15 are protruded from the rear body to be pressed and supported on the reaction force support walls 25, 26, while the thrust jack and the slip-prevention jack are provided. The thrust jack 13 is extended from the state in which the rod 16 is contracted and the front gripper 14 is immersed in the front body 9, the front body 9 is advanced with respect to the rear body 10, and the cutter plate 11 is rotated. While excavating the inclined face.

When a fixed length of the shaft B is excavated, the front gripper 14 is protruded from the front trunk portion 9 and is pressed against the wall of the shaft excavation to support the shaft excavator C on the wall of the excavation, and then the main gripper 15 is retracted. And reaction force support walls 25, 26
After that, while the thrust jack 13 is contracted, the slip-prevention jack 16 is extended according to the contraction amount, and the spreader 16a is received by the rear inclined frame portion 5b of the support frame 5 to prevent the slide-down. The rear torso 10 is moved forward by a certain length. As shown in FIG. 5, as the excavator C excavates, the slide-prevention walls D composed of segments are sequentially assembled on the frame base 1 a of the shaft-excavator mounting frame 1, and the slide-prevention wall D slides in front of the slide-prevention wall D. The excavation is performed while always receiving the spreader 16a of the prevention jack 16.

In this way, after the shaft excavator C excavates the shaft B with the shaft excavator C, the main gripper 15 is pressed against the wall of the shaft shaft excavation to support the entire excavator. In this state, the shaft 19 is excavated while the front body 9 is extended forward, and after excavation of the shaft B having a predetermined length, the front gripper 14 is pressed against the wall of the shaft, while the main gripper 15 is released from the wall. The pit B is excavated while repeating the operation of pulling the rear trunk 10 toward the front trunk 9.

Then, the segments are assembled in an annular shape on the inner wall of the excavated shaft B behind the shaft excavator C in accordance with the excavation of the shaft B with a certain length, and the slip-down preventing wall D is sequentially formed. At this time, the slip-down preventing wall D is not provided at the center of the bottom of the shaft B, that is, at the lowest bottom portion, and FIG.
As shown in the figure, the arrangement width of the excavated chute discharge chute 28 is left, and the discharge chute 28 is added according to the excavation of the inclined shaft B, and the rear end of the discharge chute 28 is set at the time of the start of the inclined excavator C. It is in a state where it communicates with the waste discharge passage 27 formed in the concrete wall portion 25. As shown in FIG. 5, the lower end of the earth and sand discharge passage 27 faces the transport start end of the shedding / unloading conveyor 29 disposed along one side wall of the horizontal pit A. It is configured to drop from the slip discharge passage 27 onto the slip discharge conveyor 29 using the inclination and discharge through the horizontal shaft A.

A sleeper 30 and a rail 31 are laid at the bottom of the shaft B in accordance with the excavation of the shaft B, and
The member 32 such as a slide-prevention wall assembling segment is carried into the shaft excavator C by running the vehicle 32. This wagon 32 to rail 31
As means for traveling on the above, a pulley was attached to the rear end face of the inclined shaft excavator C, one end of a wire rope 33 bridged over the pulley was connected to the wagon 32, and the other end was installed on the horizontal well A side. The wagon is wound up, and the carriage 32 is reciprocated in the inclined shaft B by operating the winch. In the above embodiment,
Although the inclined shaft B was excavated from the end of the horizontal shaft A, that is, from the face of the horizontal shaft A, the inclined shaft B was excavated by the inclined shaft excavator C from the middle portion of the horizontal shaft A by the same method as described above. It is possible to excavate while starting the excavator C.

[0030]

As described above, according to the method for starting an inclined shaft excavator according to the present invention, a recess for receiving the rear end of the inclined shaft excavator is formed in the bottom of the tunnel at the inclined shaft excavation position in the horizontal shaft, and the inclined shaft is excavated. After moving forward in the horizontal mine until the center of the cradle on which the excavator is mounted reaches the front edge of the opening of the recess, the cradle on which the excavator is mounted is moved to the recess side with the front end of the opening as the center of rotation. The inclined shaft excavator mounting frame is received by the bottom of the recess by tilting, and the inclined shaft excavator is tilted upward toward the front, and the frame base projecting obliquely forward from the opening front end of the recess. After fixing the first half, the inclined shaft excavator is started along this frame, so that the center of the inclined shaft excavator mounting frame is located at the front edge of the opening of the recess. The excavator with a small tilting power It can be and reliably inclined toward the inclined shaft drilling direction easily.

Further, as the tilting means, a member for supporting the center of the inclined shaft excavator mounting frame so as to serve as a fulcrum, and the rear half of the inclined shaft excavating machine mounting frame is lifted around the fulcrum while the first half is raised. It can be constructed by a cheap and simple device with means such as a pull rope to be immersed in the place, and can be smoothly and efficiently tilted in the shaft excavation direction without employing a jack or the like.

Further, since the rear half of the frame mount for the shaft excavator is immersed in the recess, the horizontal shaft can be tilted even if the upper space is small, and the rear half of the frame base is received on the inclined bottom surface of the recess. It is possible to stop the shaft excavator in the correct excavation direction by stopping it, and furthermore, without removing the frame shaft mounted with the shaft shaft excavator, start the shaft shaft excavator using the frame base as a guide, thereby improving work efficiency. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a simplified vertical side view of a state in which a shaft excavator is moved from the rear of a horizontal shaft to a shaft excavation position,

FIG. 2 is a simplified longitudinal rear view showing a fulcrum portion of a frame shaft excavator mounting frame on a recess,

FIG. 3 is a vertical side view of a shaft excavator;

FIG. 4 is a simplified longitudinal sectional side view of a state where a shaft excavator is installed facing a shaft excavation direction,

FIG. 5 is a simplified vertical side view showing a state of excavation of a shaft shaft.

FIG. 6 is a longitudinal sectional front view of a slide-prevention wall,

FIG. 7 is a simplified vertical side view showing a conventional example,

FIG. 8 is a simplified plan view thereof.

[Explanation of symbols]

 A Horizontal shaft B Incline shaft C Incline shaft excavator 1 Frame 1a Horizontal frame 1b Vertical frame 3a Pin locking hole 4 Recess 5 Support frame 5a Front inclined frame 5b Rear inclined frame 7a Pin insertion hole 8 pin

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akira Okada 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi Okumura Gumi Co., Ltd. (72) Inventor Masahiko Tanaka 2-2-2, Matsuzaki-cho, Abeno-ku, Osaka Shares Okumura Gumi Co., Ltd. (72) Inventor Yasuaki Iwamoto 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi Okumura Gumi Co., Ltd. (56) References JP-A-4-30094 (JP, A) JP-A-2-269295 ( JP, A) (58) Fields surveyed (Int. Cl. ⁷ , DB name) E21D 9/02

Claims (3)

(57) [Claims] 1. A recess for receiving a rear end side of an inclined shaft excavator is formed by excavation on the bottom of a tunnel at an inclined shaft excavation position in a horizontal shaft, and a center portion of a frame on which the inclined shaft excavator is mounted has an opening front end of the recess. After moving forward in the horizontal mine until it reaches the edge, the inclined shaft excavator mounting frame is tilted toward the recess around the opening front end as the center of rotation to receive the inclined shaft excavator mounting frame on the bottom of the recess. After stopping, the inclined shaft excavator is tilted upward and forward, and the front half of the frame base projecting diagonally forward from the front end of the opening of the recess is fixed. The method of starting a skew of an inclined shaft excavator, comprising: 2. The opening length of the recess in the horizontal shaft length direction is longer than a half length of the inclined shaft excavator, and a horizontal member is bridged over the opening of the recess. A pin support member is fixed to both sides of the front end of the opening, and after passing the front half of the mounting frame for the excavation machine over the horizontal frame, the horizontal frame is removed, and the length of the frame is added to the pin support member. The two sides of the central part in the direction are connected by a pin, and thereafter, the frame base is rotated about this pin, and the frame base for mounting the shaft shaft excavator is received on the bottom surface of the recess, whereby the shaft shaft excavator on the frame base is connected. 2. The method of claim 1, wherein the slope is inclined upward toward the front. 3. The recess is provided at a rear portion of a face of a horizontal pit, and after supporting the inclined shaft excavator in a state of being inclined upward and forward from the recess, the recess is provided from the opening front end of the recess. After placing and filling concrete in the space between the lower surface of the front half of the shaft excavator mounting frame that projects diagonally upward toward the front and the face, and fixing the shaft shaft excavator mounting frame,
3. The method according to claim 1, wherein the excavator is started from an underframe.