JPH09250288A - Inclined-starting method for incline excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and surely driven an incline excavator in the incline excavating direction in excavating an inclined shaft from a horizontal shaft obliquely upward by the incline excavator. SOLUTION: A recessed part 4 having V-shaped side faces is excavated in a tunnel floor face in an inclined shaft excavating position in a horizontal shaft (A), a frame mount 1 carrying an incline excavator (C) is delivered to the recessed part 4, the central both side parts of the incline excavator carrying frame mount 1 is supported with a pin 8 in such a state that its gravity center is positioned in the front edge part of the recessed part 4, and the incline excavator carrying frame mount 1 is tilted by setting the pin 8 as a fulcrum so that the rear half part is sunk in the recessed part 4. The frame mount 1 is inclined in the incline excavating direction, the frame mount 1 is fixed under this state, and the incline excavator (C) is started up by setting the frame mount 1 surface as a guide.

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 oblique excavator for excavating an oblique shaft from an already constructed horizontal shaft obliquely upward.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIGS. 7 and 8, in order to excavate an inclined shaft such as a penstock of a hydraulic power plant in a mountain ground, a horizontal shaft A (hereinafter , The existing horizontal mine), and the carriage 41 carrying the oblique pit excavator C is carried on the rail R laid on the bottom of the horizontal pit A and conveyed, and then the oblique pit excavator C is moved obliquely upward. Then, the tilting shaft excavator C is started. At this time, it is necessary to tilt the inclined shaft excavator C in the inclined shaft excavation direction.

Therefore, in the conventional method, after the start slope portion D having a constant depth is excavated obliquely upward from the horizontal shaft A toward the slope shaft B to be excavated, the pulley block 42 is provided at the bottom of the start slope shaft D. And the pulley 43 are installed, and the pulleys 44 and 45 are attached to the front end surface of the inclined shaft excavator C and the bottom surface of the horizontal shaft A,
Furthermore, a winch 46 is installed on the rear side, and the start slope part D
Pulleys 43 and 45, which are laid between the pulleys 44 of the excavator C and the block 42 on the side of the starting inclined shaft D
By winding with a winch 46 through
Is pulled up diagonally and the front end thereof is inserted into the starting slope pit D, and then the slope excavator C is started.

[0004]

However, according to the starting method and means of the inclined shaft excavator C as described above, the work of attaching the pulley block 42 and the pulley 43 to the starting inclined shaft portion D, the inclined shaft excavator C and the horizontal shaft. Not only is it extremely time-consuming and labor-intensive to install the pulleys 44, 45 to A, but also the tilting excavator C delusions during pulling work with a rope and its posture becomes unstable, which poses a risk to the work and increases work efficiency. There was a problem such as a decrease in Further, after the preparation for starting the inclined shaft excavator C toward the starting inclined shaft portion D side is completed, there is a problem that it is difficult to remove the pulley block 42 and the pulley 43 in the starting inclined shaft portion D. .

The present invention has been made in view of the above problems, and an object of the present invention is to automatically and efficiently take an oblique excavator from an existing horizontal shaft at a predetermined angle in an efficient and stable posture. An object is to provide a method of starting an oblique excavator that can be obliquely started.

[0006]

In order to achieve the above-mentioned object, a method of obliquely starting a slant shaft excavator according to the present invention receives a rear end side of a slant shaft excavator at a bottom of a tunnel at a slant shaft excavation position in a horizontal shaft. After excavating and forming a recess, after moving forward in the horizontal mine until the center of the frame with the tilt excavator mounted reaches the opening front end edge of the recess, mount the tilt excavator mounting frame on the front end of the opening. By tilting to the side of the recess as the center of rotation, the tilting pit excavator mounting frame base is received on the bottom of the recess and the tilting pit excavator is tilted upward toward the front, and diagonally forward from the front end of the opening of the recess. After fixing the front half of the frame stand projecting toward, the inclined shaft excavator is started along this frame stand.

[0007] In the oblique starting method of the oblique shaft excavator,
In the invention described in claim 2, the opening length of the recess in the horizontal shaft length direction is longer than half the length of the inclined shaft excavator, and a horizontal frame is bridged over the opening of the recess. Furthermore, after fixing the pin support members to both sides of the front end of the opening of the recess and passing the front half of the inclined shaft excavator mounting frame on the horizontal frame, the horizontal frame is removed and the frame is attached to the pin support member. By connecting both sides of the center in the length direction of the platform with a pin, and then turning the frame platform around this pin to receive the oblique excavator mounting frame platform on the bottom of the recess, It is characterized by tilting the inclined shaft excavator in the upward direction toward the front.

The invention according to claim 3 relates to the fixing means of the frame base in the above method, wherein the recess is provided at the rear part of the face of the horizontal shaft, and the inclined shaft excavator is provided in the recess. After supporting it in a state of inclining upward toward the front side, in the space between the lower face and the face of the front half of the inclined shaft excavator frame that projects obliquely upward from the front end of the opening of the recess. It is characterized by placing and filling concrete to fix the frame base.

[0009]

[Function] After mounting the inclined shaft excavator on the frame on the rear side of the horizontal shaft, it is transported to the inclined shaft excavation position from the horizontal shaft, and the inclined shaft is excavated on the front edge of the opening of the recess excavated in the tunnel bottom. Place the center of the frame on which the machine is mounted. From this state, if the tilting shaft excavator mounting frame is tilted with the front edge of the opening of the recess as a fulcrum, the center of the tilting excavator is positioned on the front end of the opening of the recess, so a small tilting force causes the frame to move. The platform tilts integrally with the inclined shaft excavator, the latter half of the frame base is set in the recess, and the inclined shaft excavator is installed in a state in which it is inclined obliquely upward toward the front.

In order to tilt the frame on which the inclined 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. If the pins are pivotally attached to both sides of the longitudinal center of the inclined shaft excavator mounting frame, the inclined shaft excavator mounting frame can be operated lightly and easily by making the inclined shaft excavator act with a small biasing force in the tilting direction. And it tilts accurately. Then, the inclined shaft excavator mounting frame is received by the bottom surface of the recess, and the inclined shaft excavator is tilted upward toward the front. In addition, as a means to tilt the tilt shaft excavator mounting frame, a pulley with wires laid in place in the horizontal shaft should be attached, and one end of the wire should be connected to the tilt shaft excavator while the other end should be pulled. It can be easily done by operating.

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 latter half of the inclined shaft excavator mounting frame, and the front half of the inclined shaft excavator mounting frame is recessed. From the front end edge portion of the opening, it is in a state of projecting obliquely forward, that is, in the starting direction of the inclined shaft excavator. Then, the inclined shaft excavator mounting frame is fixed in the inclined state. As the fixing means, a fixing member may be used in which concrete is cast on the inclined lower surface side of the frame base protruding from the recess and fixed to the inclined lower surface of the frame base.

Thus, after the oblique shaft excavator is installed in the oblique shaft excavating direction, the oblique shaft excavating machine is started using the frame stand inclined in the oblique shaft excavating machine starting direction as a guide, and the oblique shaft is excavated obliquely upward from the horizontal shaft. It goes.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the drawings, a concrete embodiment of the present invention will be described. In FIG. 1, A is an existing horizontal shaft, and B is a slant shaft excavator C from the face of the horizontal shaft A toward the front. It is an inclined shaft that is excavated diagonally upward. The inclined shaft excavator C is installed from the inclined shaft excavator start position in the horizontal shaft A toward the inclined shaft B to be excavated by the starting device. This starting device is composed of an inclined shaft excavator mounting frame base 1 and a recess 4 for inclining the inclined shaft excavator mounting frame base 1 in the inclined shaft excavating direction.

As shown in FIGS. 1 and 2, the inclined shaft excavator mounting frame 1 has a horizontal frame 1a for mounting the inclined shaft excavator C and supporting the lower peripheral surface of the inclined shaft excavator C over the entire length. And a vertical frame 1b that receives the back surface (rear surface) of the inclined shaft excavator C,
The vertical frame base portion 1b has a lower end integrally fixed to the rear end of the horizontal frame base portion 1a, and stands upright from the horizontal frame base portion 1a at a right angle. The width of the horizontal frame 1a of this frame 1 is the excavator C
The holding frame member 2 is formed in a size slightly smaller than the diameter of the holding rod member 2 and has opposing surfaces on both sides of the upper surface thereof, which are concave arc surfaces 2a that support both sides of the lower peripheral portion of the inclined shaft excavator C. 2 are fixed, and pin retaining holes are formed in the central portions in the lengthwise direction of the holding frame members 2 and 2, that is, the outer upper surfaces at both sides of the center of gravity of the frame base 1 on which the inclined shaft excavator C is mounted. The projecting piece 3 having the hole 3a is integrally attached. On the other hand, the vertical frame base
The width and length (height) of 1b are formed to be substantially equal to the diameter of the inclined shaft excavator C.

The recess 4 is formed by excavating the bottom surface of the tunnel at the starting position of the inclined shaft excavator C. The upper end opening is rectangular and the front and rear excavation wall surfaces are the side surfaces V of the inclined wall surfaces 4a, 4b. It is formed in a letter shape, and the opening width corresponding to the tunnel length direction of the upper end opening has a width dimension equal to or slightly larger than 1/2 length of the inclined shaft excavator C,
The opening width corresponding to the width direction of the tunnel is formed larger than the diameter of the inclined shaft excavator C. Further, the front and rear inclined frame portions 5a and the rear inclined frame portion of the V-shaped support frame 5 having the same shape as the side surface of the recess 4 are formed on the front and rear inclined wall surfaces 4a and 4b of the recess 4.
5b and 5b are placed in a leveled state and are fixed to each other through a concrete layer 6.

The front and rear inclined frame portions 5a and 5b of the support frame 5 are connected to each other at a right angle, and the inclined length of the front inclined frame portion 5a is formed to be substantially equal to half the length of the inclined shaft excavator C. At the same time, the length direction is oriented to the excavation direction of the inclined shaft. Therefore, the rear inclined frame portion 5b is orthogonal to the excavation direction of the inclined shaft. Further, the front tilted frame portion of the support frame 5 located at the opening front edge portion of the recess 4
Pin support members 7, 7 having a lateral width dimension through which the frame 1 can pass and having a pin insertion hole 7a formed in the center portion are opposed to each other on both upper ends of 5a in a protruding state. The pin insertion hole 7a is formed at the same height as the pin locking hole 3a. Reference numeral 8 denotes a pin which is inserted and locked in the pin locking hole 3a from the pin insertion hole 7a.

The excavator C for excavating the inclined shaft B is a tunnel excavator called a tunnel boring machine (TBM), and as shown in FIG. 3, it has a cylindrical front body 9 and a rear body 10. A rotary drive mechanism 12 for the cutter plate 11 is arranged in the front body portion 9 and a plurality of positions of the front body portion 9 and the rear body portion 10 are connected by thrust jacks 13. Further, on the peripheral walls of the front body portion 9 and the rear body portion 10, a front gripper that appears from the inside of the body toward the excavated surface of the inclined shaft by the operation of a hydraulic cylinder (not shown) at appropriate intervals in the circumferential direction.
14 and a main gripper 15 are arranged respectively. Reference numeral 16 denotes a slip-prevention jack arranged and fixed at a plurality of inner peripheral surfaces of the rear body portion 10, and a front end surface of the slip-prevention wall D for covering the spreader 16a attached to the rod end of the spreader 16 on the excavated wall of the inclined shaft B. I am trying to accept it. In addition, this anti-slip jack
16 is used as a propulsion jack when the ground is bad and thrust support cannot be obtained by the main gripper 15.

A method of digging the inclined shaft B by starting the inclined shaft excavator C from the inclined shaft excavation position will be described. First, after the inclined shaft excavator C and the inclined shaft excavator mounting frame 1 are assembled in the horizontal shaft A. The inclined shaft excavator C is mounted on the frame 1 and is moved forward to the concave portion 4 which is the excavation position of the inclined shaft B, and the concave portion 4 is also moved.
A horizontal frame 17 made of steel for supporting the weight of the inclined shaft excavator C while allowing the excavator C to pass therethrough is provided in the recess 4
Is installed over the upper ends of the front and rear inclined wall surfaces 4a, 4b.
Note that, instead 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 the inclined shaft excavator mounting frame 1 is tilted. In addition, when moving the inclined shaft excavator mounting frame 1, an appropriate horizontal guide (not shown) is laid on the bottom surface of the tunnel and the face a of the horizontal shaft A is used.
A pulley 18 is attached to the lower end of the wire rope, and one end of a wire rope 19 wound around the pulley 18 is connected to the front end surface of the frame base 1, while the other end is a pulling means such as a winch (not shown). By pulling by.

The pin support member 7, which is provided on both sides of the front end edge of the opening of the recess 4, has the inclined shaft excavator mounting frame 1 reaching the recess 4 and passing the front half thereof over the horizontal frame 17. The pin engaging holes 3a and 3a of the projecting pieces 3 and 3 projecting on both sides at the center of gravity of the inclined shaft excavator mounting frame 1 are stopped at the position where the center of gravity reaches between the pin insertion holes 7a and 7a of 7. After the projecting piece 3 and the support member 7 are pivotally attached by inserting the pin 8 by aligning with the pin insertion holes 7a, 7a of the pin support members 7, 7, the horizontal bridge 17
To remove. On the cutting face side of the horizontal shaft A that receives the first half of the inclined shaft excavator mounting frame 1, the tunnel length from the front end edge of the opening of the recess 4 to the cutting face is 1/100 times that of the inclined shaft excavator C.
The excavation is made to be slightly longer than two lengths, and the upper half of the face is formed as an inclined surface on which excavation can be started by the inclined shaft excavator C.

After pivoting the both sides of the center of the inclined shaft excavator mounting frame 1 with the pins 8 as described above, when the latter half of the frame is tilted in the direction in which the pin 8 is sunk into the recess 4 as a fulcrum, As shown in FIG. 4, the horizontal frame 1a of the inclined shaft excavator mounting frame 1
The rear half of the vertical frame member 1b 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 the inclined shaft excavator C is stopped, the inclined shaft excavator C is oriented in the inclined shaft excavation direction.

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

The tilting operation of the inclined shaft excavator mounting frame 1 is as follows.
The center of gravity of the tilting excavator mounting frame 1, that is, the pin 8 is positioned slightly ahead of the front edge of the opening of the recess 4 and the horizontal frame 17 is removed even if the horizontal frame 17 is removed. However, the center of gravity may be located slightly rearward of the front end edge of the opening of the recess 4, and in this case, the inclined shaft excavation is performed without using the wire ropes 22 and 23. A towing means such as a winch is installed on the face of the machine in front of the machine, and the wire rope connected to the front end of the inclined shaft excavator C is towed by this towing means to keep the inclined shaft excavator mounting frame 1 horizontal. In the state, the horizontal frame 17 was removed, and then the wire rope was gradually loosened by the pulling means, and the latter half of the inclined shaft excavator mounting frame 1 was tilted into the recess 4 with the pin 8 as the fulcrum as described above. After that, the pulling means and the wire rope may be removed.

When the rear half of the frame 1 is immersed in the recess 4,
The front half of the frame base 1 projects obliquely 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 and filled in the space of the frame, and the inclined upper surface of the fixing member 24 made of the concrete is integrally fixed to the lower surface of the front half of the horizontal frame base portion 1a of the frame base 1 so that the frame base 1 is in the inclined state. Fix with. After that, the inclined shaft excavator C is started to excavate the inclined shaft B, but before that, the main gripper 15 of the inclined shaft excavator C is received on the both side excavation wall surfaces of the horizontal shaft A at the position of the recess 4 in advance. Reaction force supporting walls 25, 26
Is formed.

As shown in FIG. 2, the reaction force supporting wall portions 25 and 26 are formed in the thick wall portion 25 by pouring concrete on one side of the excavated wall surface of the horizontal shaft A. The portion 25 is configured to be provided with an excavation shear discharge passage 27 described later. When the ground of the horizontal shaft A is hard rock that can support the reaction force of the main gripper 15, the other reaction force support wall portion 26 does not necessarily have to be provided.

In order to excavate the inclined shaft B by the inclined shaft excavator C, the main grippers 15 and 15 are protruded from the rear trunk portion to be pressure-bonded to and supported by the reaction force supporting wall portions 25 and 26, while the thrust jack and the slip-prevention jack. When the rod 16 is contracted and the front gripper 14 is retracted into the front body portion 9, the thrust jack 13 is extended to advance the front body portion 9 with respect to the rear body portion 10 and rotate the cutter plate 11. While excavating the inclined face.

When a certain length of the inclined shaft B is excavated, the front gripper 14 is projected from the front body portion 9 and pressed against the inclined shaft excavated wall surface to support the inclined shaft excavator C on the excavated wall surface, and then the main gripper 15 is retracted. Reaction force support wall 25, 26
After that, the thrust jack 13 is contracted while the anti-slip jack 16 is extended according to the amount of contraction, and the spreader 16a is received by the rear side inclined frame portion 5b of the support frame 5 to prevent slipping. While moving the rear body part 10 forward for a certain length. Further, as shown in FIG. 5, as the excavation of the inclined shaft excavator C is continued, as shown in FIG. 5, the slide prevention walls D composed of segments are sequentially assembled on the frame base portion 1a of the inclined shaft excavator mounting frame 1, and the front surface of the slide prevention wall D is slid down. The spreader 16a of the prevention jack 16 is constantly received to proceed with the digging.

Thus, after the oblique shaft excavator C enters the oblique shaft B while excavating the oblique shaft B by the oblique shaft excavator C, the main gripper 15 is pressed against the oblique shaft excavating wall surface to support the entire excavator. In this state, the front shaft 9 is extended forward to excavate the inclined shaft B, and after excavating the inclined shaft B of a certain length, the front gripper 14 is crimped to the inclined shaft excavation wall surface, while the main gripper 15 is released from the excavation wall surface. The operation of pulling the rear body portion 10 toward the front body portion 9 side is repeated to advance the inclined shaft B.

Then, in accordance with the excavation of a certain length of the inclined shaft B, the above-mentioned segments are assembled in an annular shape on the inner wall of the excavated inclined shaft B behind the inclined shaft excavator C to form the slip prevention wall D sequentially. At this time, the slip-prevention wall D is not provided in the central portion of the bottom surface of the inclined shaft B, that is, the lowest bottom surface portion, as shown in FIG.
As shown in FIG. 4, the width of the excavation shearing discharge chute 28 is left, and the discharging chute 28 is replenished as the excavation of the inclined shaft B is continued. It is in a state of being communicated with the shear 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 is made to face the conveyance start end of the shear carry-out conveyor 29 arranged along one side wall surface of the horizontal pit A, and the excavation shear is discharged from the discharge chute 28. The slope is used to drop from the shear discharge passage 27 onto the slide carry-out conveyor 29 and discharge through the horizontal pit A.

In addition, sleepers 30 and rails 31 are laid at the bottom of the inclined shaft B in accordance with the progress of the inclined shaft B.
32 is run to bring in members such as the slide prevention wall assembly segment to the side of the inclined shaft excavator C. This trolley 32 rail 31
As means for traveling above, a pulley is attached to the rear end face of the inclined shaft excavator C, one end of the wire rope 33 hung on this pulley is connected to the cart 32, and the other end is installed on the horizontal pit A side. The wagon is wound up on the winch, and by operating the winch, the cart 32 is reciprocated in the inclined shaft B. In the above examples,
The inclined shaft B was excavated from the end portion side of the horizontal shaft A, that is, from the face portion of the horizontal shaft A, but when the oblique shaft B is excavated from the middle portion of the horizontal shaft A by the oblique shaft excavator C, the inclined shaft is also processed by the same method as above. It is possible to excavate while starting the excavator C.

[0030]

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

Further, as the tilting means, a member for supporting the both sides of the center of the slant shaft excavator mounting frame as a fulcrum and a front half of the slant shaft excavator mounting frame are lifted around the fulcrum while the latter half is recessed. It can be constructed by an inexpensive and simple device with a means such as a pulling rope to be immersed in the site, and can be tilted smoothly and efficiently in the excavating direction of the inclined shaft without employing a jack or the like.

Further, since the rear half of the tilting pit excavator mounting frame is immersed in the recess, it can be tilted even if the upper space of the horizontal shaft is small, and the tilting bottom of the recess receives the rear half of the frame. It is possible to stop the inclined shaft excavator in the correct excavation direction, and on top of that, the inclined shaft excavator is started up using the inclined frame excavator as a guide without removing the inclined shaft excavator mounting frame, thus improving work efficiency. Can be achieved.

[Brief description of drawings]

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

FIG. 2 is a simplified vertical sectional rear view showing a fulcrum portion of the inclined shaft excavator mounting frame on the recess,

FIG. 3 is a vertical side view of an inclined shaft excavator,

FIG. 4 is a simplified vertical cross-sectional side view of the inclined shaft excavator installed in the inclined shaft excavation direction.

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

FIG. 6 is a vertical sectional front view of the slip-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 Inclined shaft C Inclined shaft excavator 1 Frame base 1a Horizontal frame base 1b Vertical frame base 3a Pin locking hole 4 Recess 5 Support frame 5a Front inclined frame 5b Rear inclined frame 7a Pin insertion hole 8 pins

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryosuke Mishima 2-2, Matsuzaki-cho, Abeno-ku, Osaka City Okumura-gumi, a stock company (72) Inventor Akira Okada 2--2, Matsuzaki-cho, Abeno-ku, Osaka Stock company Okumura group (72) Inventor Masahiko Tanaka 2-2 Matsuzaki-cho, Abeno-ku, Osaka City Company Okumura group (72) Inventor Yasuaki Iwamoto 2-2 Matsuzaki-cho, Abeno-ku, Osaka Inside the Okumura group

Claims (3)

[Claims] 1. A recess for receiving a rear end side of an oblique excavator is excavated and formed in a bottom surface of a tunnel at an oblique excavation position in a horizontal shaft, and a central portion of a frame on which the oblique excavator is mounted has a front end of an opening of the recess. After moving forward in the horizontal shaft until it reaches the edge, the inclined shaft excavator mounting frame base is received on the bottom surface of the recess by tilting the inclined shaft excavator mounting frame base toward the recess side with the opening front end as the center of rotation. After that, the inclined shaft excavator is tilted upward toward the front, and the front half of the frame stand that protrudes obliquely forward from the front end of the opening of the recess is fixed, and then the inclined shaft excavator along the frame stand. A method of obliquely starting a slant shaft excavator, comprising: 2. The opening length of the recess in the horizontal shaft length direction is longer than 1/2 length of the inclined shaft excavator, and a horizontal frame is bridged over the opening of the recess. After fixing the pin support members on both sides of the front end of the opening and passing the front half of the inclined shaft excavator mounting frame on the horizontal frame, remove the horizontal frame and add the length of the frame to the pin support members. The both sides of the central part of the direction are connected by a pin, and then the frame stand is rotated around this pin to receive the tilting excavator mounting frame stand on the bottom surface of the recess, and thereby the tilting excavator on the frame stand. The inclined starting method of the inclined shaft excavator according to claim 1, wherein the inclined portion is inclined upward toward the front. 3. The recess is provided at a rear face of a face of a horizontal shaft, and supports the slope excavator in a state in which the slope excavator is inclined upward toward the front, and then from the front end of the opening of the recess. After placing the concrete in the space between the lower face and the face of the front half of the inclined shaft excavator mounting frame that projects obliquely upward toward the front, and fixing the inclined shaft excavator mounting frame by filling it,
The oblique starting method for an oblique excavator according to claim 1 or 2, wherein the oblique excavator is started from above the underframe.