JP3031458B2 - Drilling method of crossing pit from existing pit and its rig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for excavating a crosshole from an existing excavation in which an excavation is excavated in a direction crossing the axis of the excavation from an excavation formed in the ground. And its drilling rig.

[0002]

2. Description of the Related Art Conventionally, many tunnels are formed by a tunnel excavator in order to utilize an underground space. For example, as a tunnel excavator to excavate hard rock formations,
Thrust reaction force provided on the body of the tunnel excavator The thrust reaction force is received at the tunnel wall by pressing the gripper, which receives the thrust reaction force, against the tunnel wall, and the cutter head provided at the tip is rotated and propelled while rotating in a predetermined direction. Some excavate tunnels.

[0003] As a prior art of an excavator for digging a pit from the ground or the like, there is an invention described in Japanese Patent Application Laid-Open No. 58-4088. In order to apply thrust to the cutter head necessary for excavating the pit, a weight is provided to excavate the pit.

[0004]

On the other hand, in recent years, in order to more effectively use the underground space, an excavated pit has to be crossed in an axial direction that intersects with the axis of the excavated pit (“excavated pit and There is a demand to excavate a tunnel where shaft axes intersect, and to use underground space in a more complex form. For example, one of the demands is to excavate many shafts from a horizontal shaft excavated by a tunnel excavator.

However, since the above-mentioned conventional tunnel excavator is configured to excavate a tunnel such as a horizontal shaft in a predetermined direction, a cutter head, a driving device, and a gripper are arranged in this order from the front of the excavator. Since it is provided and the trunk becomes long, it is not possible to excavate a vertical hole or the like that intersects with the axis of the excavated pit from inside the excavated pit.

In the case of the vertical excavator described in the above publication,
As a configuration for adding thrust to the cutter head necessary for excavation of the pit, a weight is provided at the rear of the cutter head, and a gripper is provided at the rear of the machine as a thrust reaction force receiving, and the thrust is applied by applying a thrust reaction to the wall of the excavation shaft. Therefore, the overall length of the machine becomes longer in order to provide a configuration for obtaining these thrusts,
It is difficult to excavate a cross shaft such as a vertical shaft from a narrow place where the size of the work space is limited, such as in a horizontal well which is an existing well.

In addition, in the case of this vertical excavator, since the excavator itself cannot travel by itself, when the excavator is moved to the next excavation position after excavation at a predetermined position, it is performed by a separate transport device such as a crane truck. In other words, it is not practical to use in places where space dimensions are limited, such as in an excavated pit. Even if equipment that can be transported in a narrow space is adopted, it is necessary to reduce the weight of the transported equipment. Digging, and it becomes impossible to perform efficient digging work with much time and labor.

[0008]

In order to solve the above problems, the invention according to the present application provides a cutter head for excavating a crossing pit in a direction intersecting with the axis of an already excavated pit. A drive device that rotationally drives and applies a thrust in the excavation direction is slidably supported by a support, and a fixing means for fixing the support to the wall surface of the excavated pit is provided on the support so as to receive a reaction force during excavation. I have.

In this manner, the support is fixed to the wall surface of the excavated pit by the fixing means so as to receive the excavation reaction force, and the cutter head is driven to rotate along the support and provides a thrust in the excavation direction. , The crossing pit can be excavated by the cutter head provided in a direction intersecting with the axis of the already excavated pit.

Further, if a moving means for moving the support body in the axial direction of the excavated mine is provided, the movement after excavation of the crossed mine can be easily performed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A method for excavating a cross shaft according to the present invention according to the present invention is to provide an excavation shaft center of a cutter head at a predetermined position on a wall surface of an excavated shaft in an axial direction intersecting with an axis of the excavated shaft. Supported, rotating the cutter head and applying thrust in the excavation direction to excavate the crossing pit in a direction intersecting with the axis of the excavated pit, and after excavation was completed, retracted the cutter head and released the support. Later, it is moved to the next excavation position along the axis of the excavated pit, the cutter head is supported at the next excavation position, and a plurality of intersections in the axial direction intersecting with the axis of the excavated pit sequentially by repeating the above steps. I try to dig a pit. In this way, a crosshead is excavated in the direction intersecting with the axis of the excavated pit with the cutter head having the axis in the direction intersecting with the axis of the excavated pit. Since it moves to the next excavation position along the core and excavates the intersection in the direction that intersects with the axis of the excavated well, it is easy to form multiple intersections in the direction that intersects with the axis of the excavated well Can be.

Further, the cross shaft excavation device of the present invention according to the present invention is a cross shaft excavation device for excavating a cross shaft in an axial direction intersecting with the axis of the already mined shaft, wherein the shaft of the already mined shaft is excavated. A cutter head for excavating in the axial direction intersecting with the core is provided, and a driving device for providing a rotational driving force and a thrust in the excavation direction is provided on the cutter head, and a guide member for supporting the driving device slidably in the excavation direction is provided. And a support provided with fixing means for fixing the excavation reaction force on the wall surface of the excavated pit , and supporting the fixing means above and below the support.
At least 3 places on one side that can adjust the slight inclination of the body
And a fixing member that can be operated independently .
Thereby, the support is fixed to the wall surface of the excavated pit by the fixing means, and the cutter head is slid in the excavation direction along the guide member while applying a rotational driving force and an excavation direction thrust to the cutter head by the driving device. Thus, the intersection can be excavated in a direction intersecting with the axis of the excavated well. And above
Independently operate the three or more fixed members below for small inclination
By adjusting the support, the support
Can be securely fixed.

[0013]

If the support is provided with a stand pipe which also serves as a direction guide for the cutter head at the beginning of excavation and maintains the water level at the time of excavation, the axis of the cutter head can be easily brought out at the beginning of excavation. At the same time, it is possible to prevent the outflow of excavated earth and water during excavation.

A contact portion between the stand pipe and the excavated pit wall is formed in a shape along the wall surface, and a seal member is provided at the contact portion of the stand pipe to seal the wall between the excavated pit and the stand pipe. Can be performed reliably.

Also, between the stand pipe and the support,
If an elevating means for pressing or detaching the stand pipe from the wall surface of the excavated pit is provided, it is possible to seal with the excavated pit wall only when the stand pipe is used.

Further, by providing a moving means for supporting the weight of the support and moving the support in the axial direction of the excavated pit, the moving means excavates the crossing pit as described above, and Since the support can be moved to the excavation position, a plurality of intersections can be excavated continuously.

Further, if an adjusting means for adjusting the relative direction of the moving means with respect to the support is provided between the moving means and the support so that the moving direction of the support can be changed, the excavated pit can be changed. The support can be moved along the excavated pit wall even if the axis of the shaft is shifted.

Further, if the moving means is constituted by a slide box having an axis in the moving direction of the support, and a walking beam having a fixing member which slides in the slide box and supports the weight of the support. The weight can be easily moved by alternately performing the weight support of the walking beam by the support fixing means and the weight support of the support by the walking beam fixing member.

[0020]

Further, the earth and sand excavated by the cutter head
Hyde means for discharging provided, the earth removal means, and shear lift tube provided on the cutter head side facing the drilling surface of the front cutter head, a discharge drainpipe provided on the drive apparatus side communicating with said shear fried tube, If a suction pump or a jet pump for providing a negative pressure in the discharge pipe is provided, a discharge means capable of discharging the excavated waste without clogging in a narrow excavated pit can be configured.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the invention according to the present application will be described below with reference to the drawings. FIG. 1 is a partially cross-sectional side view showing an example of a crossing excavator according to the present invention, FIG. 2 is a cross-sectional view taken along line AA shown in FIG. 1, FIG.
FIG. 4 is a view as seen from the direction of arrows CC, and FIG. 5 is a view as viewed from the directions of arrows DD.
FIG. 6 is an enlarged sectional view showing a cutter head of the crossing excavator shown in FIG. 1, and FIG. 7 is an enlarged front view showing the cutter head. 8 is a drawing showing a rotary table of the crossing excavator shown in FIG. 1, (a) is a side view, (b) is a plan view, and FIG. 9 is a sectional view of the rotary table.
FIG. 8B is a sectional view taken along line EE of FIG. 8B, and FIG. 8B is a sectional view taken along line FF of FIG. 10 is a sectional view taken along line GG shown in FIG. 2, FIG. 11 is a sectional view taken along line HH shown in FIG. 2, FIG. 12 is a sectional view taken along line II in FIG. 2, and FIG. FIG. In this embodiment, an example will be described in which a shaft is excavated from a horizontal excavated shaft t downward in an axial direction orthogonal to the axis c of the excavated shaft t.

As shown in the figure, a cutter head H having an axis in the axial direction intersecting with the axis c of the excavated pit t is provided.
Above the cutter head H, there is provided a driving device K for rotating the cutter head H and applying a thrust in the excavation direction. This driving device K is a support tower L which is a support body.
And can slide in the excavation direction along the support tower L. This support tower L has an excavated pit t
A fixing means G fixed to the wall surface f and receiving the excavation reaction force is provided. In this embodiment, a moving means R for moving the supporting tower L in the direction of the axis c of the excavated pit t is provided, and a discharging means S for discharging the excavated earth and sand is provided at the center of the cutter head H. And these constitute the crossing excavator M.

In the cutter head H, a plurality of excavating cutters 2 are provided on a lower surface of a frame 1 having a flange 1a at an upper end, and a guide stabilizer 3 at the time of rotating the cutter is provided at an upper portion.
In the center of the frame 1, there is provided a slip lifting pipe 4 for discharging excavated earth and sand.

Further, a stand pipe 5 is provided around the cutter head H to maintain the water level at the time of excavation and also serves as a direction guide for the cutter head H at the beginning of excavation. As shown in FIG. It is supported on the support tower L by a plurality of pressing jacks 8 as lifting means. Both ends of the pressing jack 8 are connected by pins. The inner diameter of the stand pipe 5 is substantially equal to the outermost diameter of the guide stabilizer 3, and the inner surface of the stand pipe serves as a guide for projecting the axis of the cutter head H during excavation. The outermost diameter of the guide stabilizer 3 is almost equal to the excavation diameter. As the excavation progresses, the stabilizer 3 comes into contact with the stand pipe 5 and the wall F of the crossover T to form a cutter head guide portion at the time of excavation. Become.

In this embodiment, the contact portion 6 of the lower part of the stand pipe 5 with the excavated pit wall f is formed in a shape along the wall f, and the contact member 6 is provided with a sealing member 7 to exert a reliable sealing effect. I can do it. The lower end of the stand pipe 5 is sealed by the sealing member 7 by pressing the stand pipe 5 against the excavated pit wall f with the pressing jack 8.

As shown in FIGS. 6 and 7, a plurality of the excavating cutters 2 are provided at predetermined positions on the front surface of the cutter head H. At a position close to the excavating cutter 2, excavated soil is collected in a predetermined direction. A scraper 2a is provided. Reference numeral 4a denotes a suction port at the tip of the tip lifting pipe 4, which protrudes near the excavation surface.

The drive device K is provided with a rotary box 9 having a closed box shape which applies a rotational driving force to the cutter head H and a thrust in the direction of excavation. Drive motor 10 and swivel joint 11 for discharging earth and sand
Is provided.

In the rotary table 9, FIG.
(a), (b), as shown in FIGS. 9 (a), (b), the driving motor 1
A drive gear 12 meshing with the 0 pinion 10a is provided, and a drive shaft 13 supporting the drive gear 12 is supported by a bearing 14 for receiving a thrust and a radial load. The lower end of the drive shaft 13 is a companion flange 13a for connecting to the flange 1a at the upper end of the cutter head H, and the upper end is a connection flange 13b for connecting the swivel joint 11. In this embodiment, the cutter head H is driven with a large torque by driving the drive gear 12 with four (plural) drive motors 10. Reference numeral 13c denotes a passage for drainage.

Further, a guide member 15 which slides along the supporting tower L is provided at a corner of the rotary table 9, and the rotary table 9 is provided on both sides in the excavation direction as shown in FIGS. A bracket 16 for mounting a slide jack 17 for sliding is provided.

The support tower L is provided with four tower columns 18 at the corners. The inner corners of the tower columns 18 serve as guide portions 18a for guiding the guide members 15 of the rotary table 9, and the guide portions 18a The guide member 15 slides while sliding along. The upper and lower parts of the tower pillar 18 are rigidly connected by connecting beams 20a and 20b.
8 and the connecting beams 19, 20a, 20b constitute a rigid support tower L.

A gripper 2 serving as a fixing member for fixing the support tower L to the excavated pit wall f is provided at the upper and lower ends of the tower column 18.
1, 22 are provided. The upper gripper 21 is the tower pillar 1.
8 are connected to four extensible jacks 23 provided at the upper end of the column 8 by pins 23b via brackets 23a, and the lower gripper 22 is connected to brackets 24 provided at the four lower ends of the tower 18 by pins 24a. ing.

The outer surfaces of these grippers 21 and 22 are provided with shoes 21a and 22a which are in contact with the excavated pit wall f, and the grippers 21 and 22a are provided by the shoes 21a and 22a.
At both ends of 22, the excavated pit wall f is in contact. These grippers 21, 22 and shoes 21a,
The outer surface of 22a is formed by an arc along the excavated pit wall f. Thus, the small angle of the support tower L can be adjusted by the plurality of telescopic jacks 23, and the support tower L can be securely fixed. These grippers 21 and 22 constitute a fixing means G.

A rear end of a slide jack 17 for sliding the rotary table 9 in the direction of excavation is supported by a bracket 21b provided at the center of the upper gripper 21. Thus, the excavation reaction force from the rotary table 9 is directly received by the gripper 21 on the excavated pit wall f.

The moving means R is, in this embodiment, a turret post 1
The slide box 25 is provided on both sides of a connecting beam 19 connecting the lower part of the slide box 8 and a walking beam 30 slidably fitted in the slide box 25. L and the cutter head H and the driving device K are connected to the shaft center c of the excavated pit t.
You can move in the direction.

As shown in FIGS. 2 and 10, the slide box 25 is rotatably supported via a pin 27 on a holding member 26 fixed substantially above and below the center of the connecting beam 19. By determining the position where the upper pin 27a is provided from the support tower L and the slide box 2
5 is provided with a predetermined gap β. 27c is a fixing member for the lower pin 27b.

As shown in FIG. 2 and FIG. 11, a bracket 19 is provided on the upper part of the connecting beam 19 and the upper part of the slide box 25 at a predetermined distance from the position of the pin 27.
a, 25a protruding from these brackets 19, 25a.
A displacement jack 28 serving as an adjusting means is provided between a and 25a. By expanding and contracting the displacement jack 28,
The relative orientation of the slide box 25 with respect to the support tower L can be arbitrarily adjusted within the range of the gap β, whereby the moving direction of the support tower L can be changed.

Further, as shown in FIGS. 2 and 12,
Both ends of the slide box 25 are supported by support members 29 projecting from the tower column 18 and slidably supported between a predetermined gap δ provided between the support member 29 and the slide box 25. ing. At least two slidably supported support members 29 are provided before and after the slide box 25, and the weight acting on the support tower L by the support members 29 is reduced by the slide box 2.
5 can be supported by the walking beam 30, and conversely, the weight of the walking beam 30 can be supported by the support tower L via the slide box 25. An appropriate number of support metals 25b are attached to a sliding surface between the slide box 25 and the walking beam 30.

As shown in FIGS. 2 and 13, one end (left end in this embodiment) of the slide box 25 is provided with a bracket 25c projecting sideways. Clevis 32a
Is installed. Tip 32b of this sliding jack 32
Are connected to brackets 30a provided on the walking beam 30 by pins 30b, as shown in FIG. In addition, 18b is a scaffold.

As shown in FIGS. 1, 2, 3 and 4, the walking beam 30 is
5 are formed in a frame shape by left and right slide members 31 sliding in the inside, and a connecting member 40 connecting front and rear of these slide members 31. Support shoes 33 and 34 as support members are provided below the connecting member 40, and these supporting shoes 33 and 34 can be moved up and down by telescopic jacks 35 and 36 provided on the connecting member 40. Positioning shoes 37 are provided on both sides of the connecting member 40.
These positioning shoes 37 can be advanced and retracted by telescopic jacks 38, respectively. In this embodiment, since there is no intersection T on the traveling side, the support shoe 33 is provided at the center.

Although not shown, the distal ends of the extendable jacks 35 and 36 are spherical clevises, and
By fitting to the spherical clevis provided on the sides 3 and 34, bending moments other than the axial force are not generated in the telescopic jacks 35 and 36 due to the displacement of the support shoes 33 and 34. The telescopic jack 38 is connected to the bracket 39 with a pin. In addition, this connection may be spherically connected similarly to the above-mentioned telescopic jacks 35 and 36.

FIGS. 14 (a) and 14 (b) and FIGS. 15 (a) and 15 (b) are views showing an example of the earth discharging means S used for the above-mentioned crossing excavator M.

FIGS. 14A and 14B are drawings showing a case in which a jet pump is used. FIG. 14A is a side view of the configuration, and FIG. 14B is a system diagram. In this discharging means S, it is connected to the connection flange 13b of the rotary table 9. Discharge pipe 41 to swivel joint 11
, And a jet pump 42 is provided in the discharging pipe 41. The jet pump 42 is provided with a nozzle 42 a at an upper vent portion 41 a of the discharging pipe 41,
a is connected to the high-pressure drive pump 43 by a hose pipe 44. The pump 43 is driven by a drive motor 45 and ejects water in a water storage tank 46 into a discharge pipe 41 as a high-pressure jet to discharge earth and sand.

FIGS. 15A and 15B are diagrams showing a case where a vacuum suction pump is used. FIG. 15A is a side view of the configuration, and FIG. 15B is a system diagram. A pump 50 is connected to a slip tank 48 to which a drive 47 is attached.
The muddy water pump 5 driven by the drive motor 51 after sucking the drilling debris by storing it in the
It is discharged at 2.

Further, in this embodiment, as shown in FIG. 2, a connecting member 53 is provided on the traveling side of the walking beam 30, and the unloading means S is provided at a position (not shown) of the connecting member 53. The earth discharging means S (rail mount method or the like) is moved together with the walking beam 30 as the moving means R so that the earth can be efficiently excavated while quickly discharging the earth. The discharging means S is not limited to these configurations, as long as it can discharge the earth and sand excavated by the cutter head H.

FIG. 16 shows a first example of the crosshead excavator M.
FIG. 1 is a partially sectional side view showing a state before round excavation, and FIG.
7 is a partially sectional side view showing a state where the first excavation is performed from the state shown in FIG. 16, and FIG. 18 is a state showing a state where a drill pipe is connected from the state where the first excavation is completed shown in FIG. FIG. 19 is a partially sectional side view showing a state in which drill pipes are sequentially connected from the state shown in FIG. 18 to drill a cross shaft. In this embodiment, a plurality of drill pipes P are provided between the cutter head H and the driving device K.
_The example which excavates the intersection T of predetermined depth by providing _{1- Pn} is shown. Based on these drawings and FIG. 1 described above, a plurality of intersections T in the direction of a right angle intersecting with the axis c of the excavated mine t by the intersection digging apparatus M having the above configuration are shown.
Excavation will be described below.

First, when the first excavation is performed from the state shown in FIG. 1, the tip of the cutter head H is brought into contact with the wall f to deposit its own weight on the wall f, and then, as shown in FIG. Flange 1a of head H and rotary table 9
The rotary table 9 is raised by a predetermined distance by releasing the connection with the companion flange 13a and contracting the slide jack 17. Thereafter, both flanges 1a, insert the drill pipe P ₁ during 13a, the flanges 1a, 1
3a and a flange Pa of drill pipe P ₁ is rigidly connected. Forming a passage Pb for drilling muck discharged at the center of the drill pipe P _1.

Next, the lower gripper 22 provided at the lower end of the tower 18 is grounded to the wall f of the excavated pit t,
The upper gripper 21 is extended by the telescopic jack 23 and pressed against the wall f of the excavated pit t.
2, the support tower L is fixed at a predetermined position on the excavated pit wall f. At this time, by adjusting the amount of extension of the plurality of telescopic jacks 23, the inclination of the support tower L can be adjusted. At this time, in this embodiment, the walking beam 30 is also fixed at a predetermined position by pressing the shoes 33, 34, and 37 provided on the walking beam 30 against the wall surface f of the excavated pit t. Also, by extending the pressing jack 8,
Replace the seal member 7 at the tip of the stand pipe 5 with the excavated pit wall f
Press

Then, by extending the slide jack 17 while rotating the cutter head H by the driving device K, the rotating torque and the thrust are applied to the cutter head H to lower the cutter jack H by the stroke of the slide jack 17 to thereby reduce the amount of the excavated pit. Excavation of the cross shaft T on the wall f of t is started.

Thereafter, as shown in FIG. 17, by extending the slide jack 17 while rotating the cutter head H, a rotational torque and a thrust are applied to the cutter head H to lower the cutter jack H by the stroke of the slide jack 17 and to intersect. The pit T is excavated.

[0051] At this time, driving force, a pinion 10a from the drive motor 10, a gear 12, is transmitted from the drill pipe P ₁ to the cutter head H through the mating flange 13a, thrust bracket 16 from the slide jack 17, the rotary table 9, bearing 14, drive shaft 13, companion flange 1
3a is transmitted from the drill pipe P ₁ to the cutter head H through. The rotary table 9 supporting the cutter head H slides while absorbing the torque reaction force while being guided vertically along the guide member 15 and the guide portion 18a of the tower column 18.

Further, since the cutter head H descends along the inner diameter guide surface of the stand pipe 5 by the stabilizer 3, the cutter head H excavates on the wall f of the excavated pit t while preventing the shaft center of the cutter head H from swaying during excavation. The center runout of the intersection T can be prevented.

The excavation reaction force at the time of excavation is transmitted from the cutter head H to the rotary table 9, from which the bracket 16 and the slide jack 1 are moved.
7 from the shoe 21a of the gripper 21
To the wall f. At this time, some excavation reaction forces
From the guide member 15 of the rotary table 9 to the guide portion 1
The power is transmitted to the tower 18 via 8a, and transmitted from the shoe 21a of the gripper 21 to the wall face f of the excavated pit t.

The excavation slip is discharged from the slip lifting pipe 4 opening toward the excavation surface in front of the cutter head H through the central portion of the rotary table 9 and the swivel joint 11 so as to be a negative pressure. It is discharged from the earth pipe 41 together with the circulating water. At this time, by employing the jet pump type or vacuum suction type soil discharging means S, the clogging of the slip in the suction pump portion which occurs in a so-called general suction pump or the like does not occur.

At the time of the first excavation, the stand pipe 5
Because the guide portion having the inner diameter of prevents the runout of the core, the stabilizer 3 of the cutter head H can perform accurate excavation along the wall surface F of the intersection T. In addition,
If less drilling before the drill pipe P ₁ connected at the 1st excavation according to geological or the like, it is possible to initial stability enhancement of preventing deflection core according to geological like.

Then, as shown in FIG. 18, when the intersection T is excavated by the stroke of the slide jack 17,
Releasing the connection between the rotary table 9 and the drill pipe P ₁ upper flange Pa. In this case, a slidable drill pipe deposit table 54 provided in the support tower L like slide until the flange Pa lower portion of the drill pipe P ₁ supporting the weight of the cutter head H side, caused when the connecting work drill pipe P ₁ The swing and unstable state of the flange Pa are prevented. This drill pipe depositing stand 54 has a drill pipe P _1.
It is sufficient that the lower part of the flange Pa can be held at a predetermined position.

[0057] Then, by raising the rotary table 9 shortens the slide jack 17, the second knots drill space for the pipe P ₂ between the drill pipe P ₁ and the rotary table 9 attached to the cutter head H provided, the drill lower flange Pa of the pipe P ₂ connected to the upper flange Pa of drill pipe P _1, drill pipe P ₂ of the upper flange Pa rotary table 9
With the companion flange 13a. This drill pipe P ₂
Is completed, the drill pipe depositing stand 54 is retracted to a position where the rotation and lowering of the drill pipes P ₁ and P ₂ are not hindered.

[0058] After connecting this way a new drill pipe P ₂ are allowed to extend the above operation similar again slide jack 17 drilling stroke, drilling shear discharges in the same manner as in the above excavation.

Thereafter, as shown in FIG. 19, the above steps are sequentially repeated, and drilling is performed by connecting the drill pipe _Pn to a required depth.

After the drilling is completed to the required depth in this way, the drill pipes are sequentially removed by pulling up the cutter head H by a procedure reverse to the procedure of connecting the drill pipes P _{1 to} P _n , and the cutter head H is pulled up as shown in FIG. Return to the initial state. When the cutter head H is lifted, the cutter pipe H supports the own weight of the cutter pipe H and the drill pipes P _{1 to} P _n , so that the drill pipe holder 54 can support these weights. It has rigidity.

FIG. 20 is a sectional view taken along the line AA of FIG. 1 showing a state in which the crossing excavator M is moving in the axial direction of the excavated shaft after excavating the crossing shaft in the axial direction of the excavated shaft. , FIG. 21 is an AA sectional view showing a state following the state of moving in the direction of the excavated shaft shown in FIG. 20, and FIG. 22 is a state following the state of moving in the direction of the shaft of the excavated shaft shown in FIG. It is AA sectional drawing shown. Based on these drawings, the axis c of the excavated pit t
A method of moving after excavating the intersection T in the direction intersecting with the following will be described below.

As described above, the excavated pit t
When the excavation of the cross shaft T intersecting with the axis c of
As shown in FIG.
Slide jack 17 so that the
And a gap is provided between the front surface of the excavation cutter 2 and the excavated pit wall f, and a gap is provided by contracting the pressing jack 8 so that the tip of the stand pipe 5 does not contact the excavated pit wall f. At this time, the grippers 21 and 22 provided above and below the support tower L are in a state of being pressed against the wall surface f of the excavated pit t, and the weights of the grippers 21 and 22 are supported.

Then, as shown in FIG. 20, the support shoes 33 (FIG. 5) and 34 (FIG. 4) before and after the walking beam 30 and the positioning shoe 37 are shortened so as to be separated from the excavated pit wall f. The own weight of the walking beam 30 is supported by the slide boxes 25 provided on both sides. From this state, the sliding jack 32 is extended by extending the sliding jack 32 as shown by an arrow x.
The walking beam 30 is moved by one stroke of 2. This moved state is the state shown in FIG.

After the walking beam 30 has been moved a predetermined distance in the direction of the axis c of the excavated pit t in this way, the support shoes 33 and 34 and the positioning shoe 37 of the walking beam 30 are extended to extend the walking beam 30.
Is fixed to the wall face f of the excavated pit t.

At this time, the direction in the traveling direction can be adjusted by adjusting the amount of extension of the positioning shoe 37 in the direction of the arrow y. By adjusting the amount of extension of the support shoes 33 and 34, the intersection to be newly excavated can be adjusted. The verticality of the pit T with respect to the axis c of the excavated pit t can be accurately adjusted so that excavation with high accuracy can be performed.

In addition, when the axis c of the excavated mine t moving in this way is displaced, the displacement jack 28 provided between the support tower L and the slide box 25 is expanded and contracted, thereby After the sliding box 25 is turned around the center 27 and the moving axis of the walking beam 30 is aligned with the axis c of the excavated pit t, the sliding jack 32 is extended and the walking beam 3 is extended as described above.
Move 0. The maximum turning amount of the slide box 25 is determined by the clearance β between the slide box 25 and the tower pillar 18 (FIG. 1).
It can be arbitrarily set by determining 0).

Next, the gripper 2 provided on the upper part of the tower column 18
The fixing of the support tower L to the excavated pit wall f is released by contracting the telescopic jack 23 (FIGS. 4 and 5), and the supporting shoes 33 (FIG. 5) and 34 (FIG. 4) of the walking beam 30 and The weight of the cutter head H and the like supported on the support tower L by the positioning shoe 37 is adjusted by the slide box 25.
Support through.

Then, as shown in FIG. 22, by moving the support tower L in the direction of arrow z by contracting the sliding jack 32, the operation of moving the crossing excavator M to the next excavation position is completed.

After excavating the intersection T as described above, each shoe 33, 34, 3 of the walking beam 30 is excavated.
When the crossing excavator M is moved to the next excavation position using the gripper 21 and the grippers 21 and 22 of the support tower L, the gripper 21 is extended to fix the support tower L and press the jack 8 as described above. The stand pipe 5 is extended and fixed, and the next intersection T is excavated with the cutter head H. Thereafter, these steps are sequentially repeated to continuously excavate the required number of intersections T in the excavated shaft t.

In the above embodiment, the operation panel and the operating units for performing excavation control are not shown, but these control devices are also provided in the excavated pit t. What is necessary is just to mount it on the walking beam 30 and move it with the progress of excavation.

Further, in the above-described embodiment, a cross shaft T of a vertical shaft which intersects at right angles as an axial direction which intersects with the existing shaft t of the horizontal shaft is exemplified. Is not limited to a horizontal shaft and may be a vertical shaft or an inclined shaft, and the crossing shaft T is not limited to a vertical shaft, and may be a horizontal shaft or an inclined shaft. In addition, the crossing direction of the excavated pit t with respect to the axis c is not limited to the right angle direction, and may be oblique. Any configuration other than the above embodiment may be used as long as the configuration is such that the intersection T is excavated in the axial direction intersecting with the axis c of the excavation t.

[0072]

The invention according to this application is implemented in the form described above, and has the following effects.

First, according to the method of excavating a cross shaft, a cross shaft can be excavated with a cutter head in an axial direction intersecting with the axis of the already excavated shaft. Moving to the next excavation position along the tunnel and sequentially excavating the next intersection, so that it is easy to form a plurality of intersections in a direction that intersects with the axis of the existing excavation from within a narrow excavation Becomes possible.

Further, according to the crossing excavator, the support is fixed to the wall surface of the excavated well by the fixing means and the excavation reaction force is received on the wall of the excavation, so that the excavating apparatus can be downsized. By sliding in the digging direction along the guide member while giving the rotational driving force and the digging direction thrust,
It is possible to easily excavate the intersection in a direction crossing the axis of the excavated well with good workability. This means that even when excavating from an already excavated pit that requires a large amount of torque and thrust, such as when excavating hard rock, the excavation receives a reaction force with a large supporting force at the pit wall, and Excavation can be performed efficiently.

Furthermore, if the minute inclination can be adjusted at least at three places on one side of the upper and lower sides of the excavated pit wall,
The support can be securely fixed, and the digging point can be accurately determined and the digging can be performed while ensuring the accuracy of the pit.

Further, if a stand pipe is provided on the support, the axis of the cutter head can be easily pulled out at the beginning of excavation to perform accurate and accurate excavation, and at the same time, the excavated earth and water during excavation can be prevented. Excavation can be performed.

If the contact portion of the stand pipe with the excavated pit wall surface is formed in a shape along the excavated pit wall surface and a sealing member is provided at the contact portion, the gap between the excavated pit wall surface and the stand pipe can be reliably formed. Can be sealed.

Further, by providing an elevating means for pressing or detaching the stand pipe against the wall surface of the excavated pit, the sealing between the excavated pit wall surface and the stand pipe can be arbitrarily performed.
Only when a standpipe is used, efficient sealing can be performed.

Further, by providing a moving means for supporting the weight of the support and moving the support in the axial direction of the excavated pit, the next excavation after completion of the excavation by this moving means without additional moving equipment is required. Since it is possible to easily move to the point, the excavator can be efficiently moved and a plurality of intersections can be continuously excavated.

Moreover, if the adjusting means for adjusting the relative direction of the moving means with respect to the support is provided, the support can be moved along the excavated pit wall even if the axis of the excavated pit is shifted. Accurate excavation can be performed.

Further, if the moving means is composed of a slide box and a walking beam, the supporting of the walking beam by the fixing means of the support and the supporting of the support by the fixing member of the walking beam are alternately performed to easily move. Therefore, the excavator can be efficiently moved to excavate the intersection.

[0082]

Further, by providing an earth discharging means, and forming the earth discharging means by a suction pump or a jet pump for making the inside of the earth discharging pipe a negative pressure, a slip at a suction pump portion generated by a so-called general suction pump or the like is provided. It is possible to configure a discharging means capable of efficiently excavating excavation debris in a narrow existing excavation pit without clogging.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view showing an example of a crossing excavation apparatus according to the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of the cross shaft excavator shown in FIG.

FIG. 3 is a sectional view of the cross shaft excavator shown in FIG. 1 taken along line BB.

FIG. 4 is a view of the cross shaft excavator shown in FIG.

5 is a view of the cross shaft excavator shown in FIG.

FIG. 6 is an enlarged sectional view showing a cutter head of the cross shaft excavator shown in FIG. 1;

FIG. 7 is an enlarged front view showing a cutter head of the cross shaft excavator shown in FIG.

FIGS. 8A and 8B are diagrams showing a rotary table of the crossing excavator shown in FIG. 1, wherein FIG. 8A is a side view and FIG. 8B is a plan view.

9 is a sectional view of the rotary table shown in FIG. 8, (a) is a sectional view taken along the line EE of FIG. 8 (b), and (b) is a sectional view of the rotary table of FIG.
It is F sectional drawing.

FIG. 10 is a sectional view taken along the line GG shown in FIG. 2;

FIG. 11 is a sectional view taken along line HH shown in FIG. 2;

FIG. 12 is a sectional view taken along the line II shown in FIG. 2;

FIG. 13 is a sectional view taken along the line JJ shown in FIG. 2;

FIGS. 14A and 14B are diagrams showing a case where a jet pump is used as an example of an earth discharging means used in the crossing excavator shown in FIG. 1, wherein FIG. 14A is a side view of the configuration, and FIG.

FIGS. 15A and 15B are diagrams showing a case where a vacuum suction pump is used as an example of an earth discharging means used in the crossing excavator shown in FIG. 1, wherein FIG. 15A is a side view of the configuration and FIG. 15B is a system diagram.

16 is a partially sectional side view showing a state before the first excavation by the cross shaft excavation apparatus shown in FIG. 1;

17 is a partially sectional side view showing a state where the first excavation has been performed from the state shown in FIG. 16;

18 is a partially sectional side view showing a state where the second drill pipe is connected from the state where the first excavation shown in FIG. 17 is completed.

FIG. 19 is a partially cross-sectional side view showing a state in which drill pipes are connected sequentially from the state shown in FIG. 18 to drill a cross shaft.

20 is a cross-sectional view taken along the line AA of FIG. 1, showing a state in which the crossing excavator shown in FIG. 1 is moving in the axial direction of the excavated shaft after excavating the crossing shaft in the axial direction of the excavated shaft. .

21 is an AA cross-sectional view showing a next state after the state of moving in the axial direction of the excavated pit shown in FIG. 20;

22 is a cross-sectional view taken along the line AA showing a next state after moving in the axial direction of the excavated pit shown in FIG. 21.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Frame 2 ... Excavating cutter 3 ... Stabilizer for guides 4 ... Lifting pipe 5 ... Stand pipe 6 ... Pressing jack 7 ... Sealing member 8 ... Pressing jack 9 ... Rotary table 10 ... Driving motor 11 ... Swivel joint 12 ... Drive gear DESCRIPTION OF SYMBOLS 13 ... Drive shaft 14 ... Bearing 15 ... Guide member 16 ... Bracket 17 ... Slide jack 18 ... Tower pillar 19, 20 ... Connection beam 21, 22 ... Gripper 23 ... Telescopic jack 24 ... Bracket 25 ... Slide box 26 ... Holding member 27 ... Pin 28: Displacement jack 29: Support member 30: Walking beam 31: Slide member 32: Sliding jack 33, 34 ... Support shoe 35, 36 ... Telescopic jack 37 ... Positioning shoe 38 ... Telescopic jack 39 ... Bracket 40 ... Connecting member 41 … Discharge pipe 42… J Pump 43 ... pump 44 ... hose piping 45 ... drive motor 46 ... water storage tank 47 ... vacuum suction pump 48 ... slip tank 49 ... drive motor 50 ... pump 51 ... drive motor 52 ... muddy water pump 53 ... connecting material 54 ... drill pipe depositor β , Δ: Clearance T: Crossing pit F: Wall H: Cutter head K: Drive L: Support tower G: Fixing means R: Moving means S: Discharge means M: Crossing digging equipment

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Futa Kusumoto 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Yoshizo Hazeta 1-3-2 Shibaura, Minato-ku, Tokyo (56) References JP-A-3-260293 (JP, A) JP-A-59-15189 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E21D 1/00 E21D 9/06 301

Claims (9)

(57) [Claims] 1. An excavation shaft center of a cutter head is provided and supported at a predetermined position on a wall surface of an already excavated shaft in an axial direction intersecting with an axis of the already excavated shaft. Excavation is performed by giving a thrust to the crossing shaft in the direction intersecting with the axis of the excavated well, and after excavation is completed, the cutter head is retracted and the support is released, and then to the next excavation position along the axis of the already excavated well. Moving, supporting the cutter head at the next excavation position, and excavating a plurality of intersections in the axial direction intersecting the axis of the excavated pit sequentially by repeating the above-described process. Crossing excavation method. 2. A crosshead excavation apparatus for excavating a crosshead in an axial direction intersecting with an axis of an already excavated pit, comprising: a cutter head for excavating in an axial direction intersecting with the axis of the excavated well. In addition to the above, there is provided a driving device for applying a rotational driving force and a digging direction thrust to the cutter head, and a guide member for supporting the driving device slidably in the digging direction. A support having fixing means for fixing the fixing means so as to receive the fixing means;
One side can adjust the slight inclination of the support above and below the holder
At least three independently operable fixing members are provided
By being configured Te cross pit drilling apparatus according to claim. Wherein the support, together with serving as a direction guide drilling initially cutterhead while-drilling claim 2 Symbol mounting cross pit drilling device, characterized in that a standpipe to sustain the level of. 4. The crossing shaft according to claim 3 , wherein a contact portion of the stand pipe with the excavated pit wall surface is formed in a shape along the wall surface, and a seal member is provided at the contact portion of the stand pipe. Drilling rig. Between 5. standpipe and support, according to claim 3 or claim 4, characterized in that a lifting means for pressing or leaving the stand pipe to the wall of the already wellbore
The crossing excavation device according to the above. 6. A support the weight of the support, intersection according to any one of claims 2-5, characterized in that a moving means for moving the support in the axial direction of the existing wellbore Drilling rig. 7. An apparatus according to claim 1 , wherein an adjusting means for adjusting the relative direction of the moving means with respect to the support is provided between the moving means and the support so that the moving direction of the support can be changed. The crossing excavation device according to claim 6 . 8. The moving means comprises a slide box having an axis in a moving direction of the support, and a walking beam having a fixing member which slides in the slide box and supports the weight of the support. The crossing excavation device according to claim 6 or 7, wherein: 9. Draining earth and sand excavated by a cutter head
The soil discharge means is provided, the earth removal means, and shear lift tube provided on the cutter head side facing the drilling surface of the front cutter head that,
Any of claims 2-8, wherein the discharge drainpipe provided on the drive apparatus side communicating with said shear lifting tube, by being configured to provide a suction pump or jet pump to the exhaust drainpipe negative pressure
2. The crossing excavation device according to claim 1.