JPH06100060B2 - Diagonal excavation equipment and Diagonal excavation method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an excavating device and an excavating method for excavating an inclined shaft for a sloped channel of a hydroelectric power plant.

(Prior Art) Conventionally, in an inclined shaft, explosives are set at the excavation site, the part is exploded, then the expelled earth and sand is discharged, and the explosive is set again at the next position to explode the earth and sand. The so-called arimak climber method (blasting method) of excavating the process of discharging the etc. has been used.
When the setting position is at the upper part of the inclined shaft, the above-mentioned explosive is set by a worker riding on a platform that moves up and down, and the blasted earth and sand etc. are carried out by hand.

As another construction method, mainly in foreign countries, when the inclination of the inclined shaft is 40 ° or less, the so-called TB is used for excavation using an excavation device with a cutting cutter rotatably attached to the tip.
The M (tunnel boring machine) method was used. This construction method forms a sturdy support base that receives the total weight of the excavator and the block material, etc., described below at the lower end of the inclined shaft, and from this support base to the excavator located at the upper end of the inclined shaft, A new block material, which is also a sleeper that forms a track for excavation equipment movement and excavation sediment transport, is sequentially arranged on the bottom surface of the tunnel, and the excavation equipment is supported on the inclined surface through this block material. Has become.

(Problems to be Solved by the Invention) However, in the case of the above-mentioned Arimack climber construction method, there are problems in work safety such as handling of explosives, rock fall from the face after blasting, and collapse of the face. In addition, in the case of this construction method, since the entire earth and sand is excavated by blasting, the surrounding ground is loosened by blasting, and the explosives are set and the earth and sand are all carried out by hand. At this time, workers, instruments, tools, etc. have to be retracted, resulting in a problem that the work interval for one operation becomes long, which is not preferable in terms of efficiency.

Also, in the case of the above-mentioned conventional TBM construction method, due to the nature of this construction method and the structure of the device, as mentioned above, the inclination angle of the inclined shaft is limited to a maximum of about 40 °, and it cannot be carried out with a steep inclination further than that. There's a problem. Further, this conventional construction method has a problem in that it cannot be carried out at all in places where the ground is soft, because the track cannot be laid, and the face of the excavator and its associated equipment collapses.

The present invention has been made in view of the above situation, and provides a slant shaft excavating device and a slant shaft excavating method capable of excavating safely and efficiently, regardless of the nature of the ground or a steep inclined shaft. The purpose is to do.

(Means for Solving the Problem) The inclined shaft excavating device according to the first aspect of the present invention includes:
The excavation means for excavating by contacting the ground on the front side and the drive device for driving the excavation means behind the excavation means are provided, and the peripheral surface is covered with a cylindrical outer wall. By the expansion and contraction of the direct-acting cylinder that presses the
An oblique excavation device for excavating the ground in front of the device, comprising: (a). At the base of the inclined shaft excavating device, the direct-acting cylinder has its base end abutted and supported by a slip-prevention reaction force member continuously provided along the tunnel inner peripheral wall from the tunnel entrance, Arrange a plurality of (b). When excavating the plurality of direct-acting cylinders, all of the plurality of direct-acting hydraulic cylinders expand at the same time, and at the time of contracting, some of them contract first, It is characterized in that a control means is provided to control so that the remaining ones contract.

The inclined shaft excavating device according to the second aspect of the present invention includes:
The excavation means for excavating by contacting the ground on the front side and the drive device for driving the excavation means behind the excavation means are provided, and the peripheral surface is covered with a cylindrical outer wall. By the expansion and contraction movement of the direct-acting cylinder that presses in the direction of excavation,
An oblique excavation device for excavating the ground in front of the device, comprising: (a). A plurality of thrust jacks composed of direct-acting cylinders are arranged between the front part of the device provided with the excavating means and the drive device and the base part at the rear of the device, and the front part can be projected and retracted rearwardly. It is supported at the base, and (b). A plurality of shield jacks composed of direct-acting cylinders are attached to the base so that the base ends of the shield jacks come into contact with and are supported by a slip-prevention reaction force member continuously provided along the tunnel inner peripheral wall from the tunnel entrance. Main arrangement, (c). When excavating the thrust jack and the shield jack, first, in a contracted state of the shield jack, the thrust jack extends and the front portion projects with respect to the base portion, and then the contraction speed and It is characterized in that a control means for controlling the thrust jack and the shield jack is provided so that the extension speeds are equalized and the thrust jack is contracted and the shield jack is extended.

The inclined shaft excavating method according to the third aspect of the present invention includes a front part, a excavating means for excavating the ground in front of the excavating means, and a drive device for driving the excavating means behind the excavating means. A plurality of direct-acting cylinders for pressing the means in the excavating direction are supported so that their base ends are in contact with and supported by a slip-prevention reaction force member continuously provided along the tunnel inner peripheral wall from the tunnel entrance. A method of excavating a slant shaft using an installed slant shaft excavating device, comprising: (a). When excavating, with the base end of the device in contact with and supported by the slip-prevention reaction force member behind the device, the excavation means is actuated and a plurality of the direct-acting cylinders are simultaneously extended to advance the front face. Excavate the ground and move forward,
(B). When excavating by the stroke of the direct acting cylinder, (c). A part of the plurality of the direct acting cylinders is contracted, and (d). Assembling a slip-prevention reaction force member along the inner peripheral wall at the inner peripheral wall portion of the tunnel where the space is formed by contraction, and (e). (F). Next, the remaining direct acting cylinders of the plurality of cylinders are contracted, and (g). Similarly, each step of assembling a slip-prevention reaction force member in the part where the space is formed by contraction is included, and it is always a part of the plurality of direct-acting cylinders of the oblique excavation equipment. Is abutted and supported by the reaction force member for preventing slippage at the base end side.

(Operation) Accordingly, the slant shaft excavating device or the slant shaft excavating method according to the first to third aspects of the invention configured as described above is configured such that the excavating device is a telescopic direct-acting cylinder provided at the base. Through, always at the rear, since it is supported by the slip-prevention reaction force member that is continuously provided along the tunnel inner peripheral wall from the tunnel entrance, and because the device is covered by the outer wall, Not only when the ground is hard, but also when the ground is soft or the slope is steep, the device does not slide backward, and it is possible to dig reliably, safely and efficiently.

In addition, a space for transporting excavated rock, earth and sand, etc. can be formed in the center of the anti-slip reaction force member. Therefore, the rock, etc. can be moved from the space formed in the center to the tunnel entrance side. It can be easily discharged by using natural fall.

Further, in the inclined shaft excavating device according to the second invention, when the thrust jack contracts, the shield jack expands at the same speed as the contracting speed, so that the present device (referred to as the oblique excavating device) slides down. Without this, the base portion of the device moves to the front side by the contraction of the thrust jack by the amount of excavation, and proceeds.

Further, according to the inclined shaft excavating method according to the third invention, only a part of the plurality of direct-acting cylinders supporting the excavating device during the excavation is contracted, and the space formed by the contraction is reduced. A new anti-slip reaction force member is newly assembled, the contracted part of the cylinder is brought into contact with the assembled anti-slip reaction force member, and then the remaining cylinders are contracted to form the space in the space formed therein. A new slip-prevention reaction force member is connected to the assembled slip-prevention reaction force member to form a new (ring-shaped) slide-prevention reaction force member along the inner peripheral wall. As the digging proceeds, some of the cylinders are always in contact with the slip-prevention reaction force member to support the digging device, so that the digging work can be performed safely and reliably.

Therefore, it is possible to excavate safely and efficiently without loosening the surrounding ground due to the blast.

(Examples) Hereinafter, examples of the first to third inventions will be specifically described with reference to the drawings.

FIG. 1 is an overall perspective view showing a partial configuration of an inclined shaft excavating device according to this embodiment, which is partially cut away.

The present excavating device S is roughly classified into an outer shape, a front body part A that constitutes a front part of the device, a base body part C that constitutes a base part of the device and supports the front body part A at the rear, and the front body part. It is composed of a middle body portion B connecting A and the base body portion C.

In FIG. 1, A is a front body portion of the present apparatus which is covered with a cylindrical outer wall 20, and the front body portion A is provided with four rectilinear direct-acting thrust jacks 1. It is supported by the base body portion C side of the device so as to be able to expand and contract. The base body C is also covered with a cylindrical outer wall 21.

Between the front body portion A and the base end portion C, a telescopically expandable and contractible tubular middle body portion B is interposed.

The middle body portion B is composed of a front wall portion 23 formed of a double cylindrical body and a rear wall portion 24 of a cylindrical body interposed between the double cylindrical shapes so as to be relatively slidable. The front end of the front wall portion 23 is attached to the base end of the outer wall 20 of the front body portion A, and the base end portion of the rear wall portion 24 is attached to the front end of the outer wall 21 of the base body portion C. The middle trunk portion B is contractible with respect to the relative back-and-forth movement of the front trunk portion A with respect to the base trunk portion C, and connects the outer walls 20 and 21 of the two.

Therefore, the front body portion A can be projected and retracted with respect to the base body portion C by the expansion and contraction movement of the thrust jack 1.
During this expansion and contraction, the entire apparatus is always covered by the outer walls 20 and 21 and the front wall portion 23 and the rear wall portion 24 of the middle trunk portion B.

In the case of the present embodiment, the telescopic expansion and contraction of the middle trunk portion B is caused by the guide groove 4 provided on the front wall portion 23 side of the middle trunk portion B.
The guide 5 arranged on the rear wall portion 24 side slides inside, so that it can be smoothly expanded and contracted.

A cutter head portion 30 is formed at the tip of the front body portion A, and a plurality of excavating roller cutters 33 are rotatably arranged on the cutter head portion 30. The cutter head portion 30 is driven (rotated) by the hydraulic motor 7 arranged in the front body portion A via a pair of gears.

Further, a sand and sand intake surface 31 is formed between the roller cutters 33 of the cutter head portion 30. This earth and sand intake surface 31 is a plate-shaped member having an opening of a predetermined opening area so that only rocks of a predetermined size or less among rocks excavated by the roller cutter 33 can be accommodated in the device. It is configured by drilling 32. Further, a plate-shaped scraper 35 which projects forward and extends in the radial direction of the present device is formed on the peripheral portion of the cutter head portion 30, and when the cutter head portion 30 rotates with respect to the front body portion A, It is configured to scrape off soil and the like in the front.

A space (bulk head) 10 communicating with the opening 32 is formed in the front body portion A behind the cutter head portion 30.

Further, front grippers 3 are disposed at four opposing positions on the peripheral surface of the front body portion A so as to be capable of projecting outward in the radial direction (direction orthogonal to the peripheral surface). The front gripper 3 is configured to be operated (projected / retracted) by a return hydraulic cylinder 6.

Similarly, main grippers 8 are arranged at two opposing positions on the peripheral surface of the base body C so as to project outward in the radial direction (direction orthogonal to the peripheral surface). , Is configured to be operated (projected / retracted) by the return hydraulic cylinder 9.

By the way, in the rear part of the space 10 of the above-mentioned front body part A for accommodating the rocks excavated (the bottom part in the state of excavating the inclined shaft),
An opening 11a of the slip discharge pipe 11 for conveying the rocks and the like backward (falling by its own weight) is formed, and the vicinity of the side of the opening 11a is clogged with each other at the front surface portion of the opening 11a. A crusher 12 for crushing rock into small pieces, and a vibrator 13 for vibrating the slide discharge pipe 11 in order to smoothly insert the jammed rock into the opening 11a are provided. The slip discharge pipe 11 is extended to the tunnel entrance as shown in FIG. 4, and the slip discharge pipe 11 is provided inside the device in the middle body portion B.
Similar to the above, the thrust jack 1 has a telescopic structure that can be expanded and contracted in response to the expansion and contraction of the thrust jack 1, and even when the front body A is projected or retracted with respect to the base body C, the displacement from the space 10 can be prevented. Without jumping into the device or tunnel
It is configured so that it can be transported (discharged) to the rear. Also,
The slide discharge pipe 11 is provided with a shutoff valve 11a for temporarily stopping the backward sediment when adding the slide discharge pipe 11 in the excavation process. In the base body C,
In the case of the present embodiment, four rectilinear direct-acting type shield jacks 2 are arranged, and the base end 2a of the shield jack 2 is in contact with the upper end surface of the slip-prevention reaction force member D.

In the present embodiment, the slip-prevention reaction member D is a beam member 15 made of four H-shaped steels (corresponding to the number of shield jacks 2) arranged in the longitudinal direction of the tunnel, and the beam member 15 of the tunnel. The connecting ring member 16 is arranged along the circumferential surface and connects the four beam members 15 in the circumferential direction.

One span P in the longitudinal direction of the slip-prevention reaction force member D is
The stroke of the thrust jack 1 is approximately equal to the stroke (correctly, slightly shorter).

Further, in FIG. 1, reference numeral 26 is a direction control jack for changing the excavation direction of the present apparatus, and 27 is a rolling jack for rolling the front body portion A with respect to the base body portion C.

By the way, each of the jacks and the hydraulic actuators such as the hydraulic motors are connected to a hydraulic source (hydraulic pump) via a hydraulic pipe and a control valve (not shown), and the control valve is
Under the control of a control device (not shown), pressure oil is supplied according to each mode so that this device operates in the following two modes (hard rock layer mode and weak layer mode). The mode is configured to be appropriately switched by a changeover switch (not shown) according to the geology to be excavated.

And this device is used for the following excavation work of the inclined shaft.

Below, the procedure of the operation and excavation work of this device (excavation method)
, Using FIGS. 2 and 3, and if necessary, FIG.
The case of excavating a hard rock layer will be described as an example with reference to FIG.

In this case, first, the changeover switch is used in the hard rock layer mode.

At present, the inclined shaft excavating device S is installed along the inner peripheral wall of the tunnel in the steeply inclined tunnel as shown in FIG. 4 at the base end side as shown in FIG. It is supported in the vertical direction by abutting against the anti-slip reaction force member D provided, and the main gripper 8 projects toward the inner peripheral wall of the tunnel, so that the friction between the outer peripheral surface of the main gripper 8 and the inner peripheral wall of the tunnel. And the thrust jack 1 and the shield jar 2 of this device are both in a contracted state. At this time, in order to maintain the posture of the present device, the front gripper 3 is pressed against the side projecting toward the inner wall of the tunnel at a low pressure.

From this state, first, the control device controls a control valve (not shown) to supply pressure oil to the hydraulic motor 7 to rotate the cutter head portion 30 at the tip as shown in FIG. , The pressure oil is supplied to the oil chamber on the extension side of the thrust jack 1 to extend the thrust jack 1.

Therefore, the ground contacting the front surface of the apparatus is excavated by the cutter 33 and the scraper 35 shown in FIG.

Then, as shown in FIG. 2C, when the thrust jack 1 is extended, the control device detects this and controls the control valve to control the thrust jack 1 and the hydraulic motor 7 (first). Stop the pressure oil supply (see Fig. 1).

Next, the control device controls the control valve to supply pressure oil to the hydraulic cylinder 6 (see FIG. 1) of the front gripper 3 and to the hydraulic cylinder 9 (see FIG. 1) of the main gripper 8. Stop supplying pressure oil.

For this reason, as shown in FIG. 2D, the front gripper 3 projects at a high pressure and the main gripper 7 is housed in the apparatus. Then, in this state, the control device controls the control valve to supply pressure oil to the contraction side oil chamber of the thrust jack 1 and supply pressure oil to the extension side oil chamber of the shield jack 2. Then, the thrust jack 1 is contracted and the shield jack 2 is expanded (see FIG. 2D). At this time, the control device supplies the pressure oil while adjusting the oil supply amount so that the contraction speed of the thrust jack 1 and the extension speed of the shield jack 2 become equal. In this device, the operations of the thrust jack 1 and the shield jack 2 are controllably interlocked so that they operate at the same speed.

Therefore, if there is a difference between the contraction speed and the expansion speed, the control device stops both operations.

For this reason, in the present embodiment, it is ensured that the base body part C moves to the front body part A side without the front body part A of the apparatus slipping off.

When the base body portion C moves forward as described above, the control device controls the control valve to first supply the pressure oil to the hydraulic cylinder 9 and, as shown in FIG. 2 (e), the main gripper. Extend 8 to the inner wall of the tunnel.

Subsequently, the control device controls the control valve so that, out of the four shield jacks 2 which are in contact with the tip of the slip-prevention reaction force member D, the two shield jacks 2 on the lower side (left side in FIG. 2) of the tunnel.
Pressure oil is supplied to the oil chamber on the contracting side of the book shield jacks 2 to contract these shield jacks 2 (see FIG. 2 (e)). Therefore, on the base end side of the present device, a space is formed in the lower half between the device and the slip-prevention reaction force member D.

In this state, the control device waits (stops) the device in this state until the next instruction is given. The worker assembles a portion corresponding to the lower half of the slip-prevention reaction force member D in this space along the excavated inner surface (see FIG. 2 (e)).

Then, when the assembly is completed, when the operator inputs a signal to that effect to the control device, the contracted lower 2
As shown in FIG. 2F, pressure oil is applied to the oil chamber on the extension side of the book shield jack 2 until the shield jack 2 comes into contact with the assembled slip-prevention reaction force member D at a predetermined pressure. To supply.

When the control device confirms the contact, the control device controls the control valve to supply the pressure oil to the oil chambers on the contraction side of the upper two shield jacks 2 (on the right side in FIG. 2). Then, as shown in FIG. 2F, these shield jacks 2 are contracted.

Therefore, on the base end side of the present device, a space is formed in the upper half between the present device and the anti-slip reaction member D.

In this state, the control device waits (stops) the device in this state until the next instruction is given. The worker assembles the slip-prevention reaction force member D corresponding to the upper half in this space portion so as to be connected to the slide-prevention reaction force member D of the lower half assembled above (see FIG. 2F). ).

In this state, a ring-shaped slip-prevention reaction force member D along the wall surface is formed on the inner peripheral wall of the tunnel at the newly dug portion.

When the operator completes the work, when the operator inputs a signal to that effect to the control device, the shield jack 2 is placed in the oil chamber on the extension side of the two contracted upper shield jacks 2. Pressure oil is supplied until the assembled anti-slip reaction member D comes into contact with the slide member at a predetermined pressure.

In this state, although not shown, the slip discharge pipe 11 in the present apparatus and the slip discharge pipe provided in the tunnel behind the gap are separated from each other, and the slip-prevention reaction member is present. After the assembly of D is completed, the gaps between the device and the rear side of the discharge pipes 11 separated from each other are connected to each other by adding new slide discharge pipes 11. At this time, the control device controls so that the shutoff valve 11A provided in the slip discharge pipe 11 in the present device is shut off so that the earth and sand remaining in the slip discharge pipe 11 does not go out of the pipe.

Then, when the base ends of the four shield jacks 2 come into contact with the assembled slip-prevention reaction force member D, the pressure of the pressure oil in the hydraulic cylinder 6 is reduced, as shown in FIG. Then, the front gripper 3 is extended at a low pressure.

In the series of operations (processes), one cycle of excavation is completed, and the series of cycles is continued until the excavation of the inclined shaft portion of the tunnel is completed.

In the above cycle, rocks etc. excavated by the roller cutter 33 and having a size smaller than a predetermined size are not included in the sediment capturing surface 31.
Fall into the space 10 of the front torso A, these rocks,
Due to the vibrator 13 or the inclined surface formed at the bottom of the space 10 and the like, and due to the invasion of the space 10 (not shown) and the dumping operation toward the opening 11a side of the damper, the space 1
Rocks and the like that have entered the opening 11a provided at the rear part of 0 are discharged through the inside of the slip discharge pipe 11 to the tunnel inlet side by the vibrator 13 provided in the slip discharge pipe 11 or by gravity. In addition, despite the vibration of the vibrator 13, when rocks or the like compete against each other on the upper surface of the opening 11a and cannot enter the opening 11a, the crusher 12 is operated to release this state.

Next, the operation of the device and the procedure of excavation work when the present inclined shaft excavation device is used for excavation of a weak layer will be described. In this case, the changeover switch is used in the weak layer mode.

In the case of this weak layer, as in the case of the above-mentioned hard rock layer, the drag of the inner wall of the tunnel is weak and the main gripper 8 and the front gripper 3 do not act effectively, so the operation of these grippers and this step are eliminated, With this,
Expansion and contraction of the thrust jack 1 is also unnecessary, and the operation and procedure are different from the above case. That is, at present, the main excavation device S slides down in the steeply inclined tunnel as shown in FIG. 4 through the shield jack 2 on the base end side as shown in FIG. It is assumed that it is supported in the vertical direction (tunnel longitudinal direction) by coming into contact with the prevention reaction force member D. The main gripper 8 and the front gripper 3 are always contracted and housed in the apparatus as described above.

From this state, first, the control device controls a control valve (not shown) to supply pressure oil to the hydraulic motor 7 (see FIG. 1),
As shown in FIG. 3B, the cutter head portion 30 at the tip is rotated and pressure oil is supplied to the oil chamber on the extension side of the shield jack 2 to extend the shield jack 2.

Therefore, the ground in contact with the front surface of the apparatus is excavated by the cutter head portion 30 and the scraper 35 shown in FIG.

Then, as shown in FIG. 3C, when the shield jack 2 is extended, the control device detects this and controls the control valve to control the shield jack 2 and the hydraulic motor 7 ( Stop the pressure oil supply (see Fig. 1).

Next, the control device controls the control valve so that the four shield jacks 2 that are in contact with the tip of the slip-prevention reaction force member D are in contact.
Among these, pressure oil is supplied to the oil chambers on the contraction side of the two shield jacks 2 on the lower side (left side in FIG. 3) of the tunnel, and as shown in FIG. Contract the jack 2. Therefore, on the base end side of the present device, a space is formed in the lower half between the device and the slip-prevention reaction force member D (see FIG. 3D).

In this state, the control device waits (stops) the device in this state until the next instruction is given. The operator assembles a portion corresponding to the lower half of the slip-prevention reaction force member D in this space portion (see FIG. 3D).

Then, when the assembly is completed, when the operator inputs a signal to that effect to the control device, the contracted lower 2
Pressure oil is supplied to the oil chamber on the extension side of the book shield jack 2 until the shield jack 2 comes into contact with the assembled slip-prevention reaction force member D at a predetermined pressure.

When the control device confirms the contact, the control device controls the control valve to supply the pressure oil to the oil chambers on the contraction side of the upper two shield jacks 2 (on the right side in FIG. 3). , These shield jacks 2 are contracted as shown in FIG.

Similarly to the above, at the base end side of the present device, a space is formed in the upper half between the device and the slip-prevention reaction member D.

In this state, the control device waits (stops) the device in this state until the next instruction is given. The operator assembles the slip-prevention reaction force member D corresponding to the upper half in this space so as to be connected to the slip-prevention reaction force member D of the lower half assembled above (see FIG. 3 (e)). ).

When the operator completes the work, when the operator inputs a signal to that effect to the control device, the shield jack 2 is placed in the oil chamber on the extension side of the two contracted upper shield jacks 2. Pressure oil is supplied until the assembled anti-slip reaction member D comes into contact with the slide member at a predetermined pressure.

As in the case of the above-mentioned hard rock layer, in this state, in the separated portion between the slip discharge pipe 11 in the present apparatus and the slip discharge pipe 11 arranged in the tunnel behind it,
A new scrap discharge pipe 11 is added and connected.

In the above series of operations, one cycle of weak layer mode excavation is completed, and the series of cycles is continued until the tunnel excavation is completed.

In this weak layer, because the ground is soft, it is not possible to obtain the drag force to prevent sliding down even if the inner wall of the tunnel is pressed with a gripper, as in the case of a hard rock layer. However, rather, by utilizing the geology that is likely to collapse, the collapsed earth and sand are trying to help prevent slippage by the frictional force (drag) due to the pressing force that presses the outer peripheral surface of the device from the outside.

In the weak layer, the slip-prevention reaction force member D may rotate in the circumferential direction due to the excavation torque reaction force. In this case, from the slip-prevention reaction force member D, for example, A lock bolt or the like may be driven into the tunnel ground to prevent rotation.

By the way, in this device, when the four thrust jacks 1 and the four shield jacks 2 are extended at the same time, a control interlock is provided so that they are extended at the same speed, and the safety of the operation of the device is improved. I am raising. Although not shown, a check valve (emergency shutoff valve) is provided in the hydraulic line that connects each hydraulic cylinder to the hydraulic power source, and when the pressure oil in each cylinder or gripper exceeds a prescribed flow rate due to damage to the hose, etc. , The pipeline is shut off to maintain the hydraulic pressure of the hydraulic circuit, prevent the equipment from slipping, and ensure safety.

Further, when the excavation direction of the present excavator is deviated from a predetermined direction for some reason, the direction control jack 26 is operated to correct the direction.

By the way, in the above embodiment, the case where the number of shield jacks and the thrust jacks is four has been described, but at least two or more shield jacks and thrust jacks may be provided so as to obtain the above-mentioned action.

(Advantageous Effects of the Invention) The inclined shaft excavating device according to the present invention is configured and operates as described above. Therefore, if the oblique excavating device is excavated by the construction method including the steps described above using the present inclined shaft excavating device, Even in such a geological site, a steep inclined shaft can be efficiently and safely excavated. Of course, a slope with a gentle slope can be efficiently and safely excavated as well.

Moreover, the excavated rock or earth and sand are
No energy is required for transportation because the inside of the sludge discharge pipe is discharged to the tunnel entrance, and workers who assemble the slip-prevention reaction force member at the rear of this device are safe and in a good environment. Can work in.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing the overall construction of an inclined shaft excavating device according to an embodiment of the present invention including a slip-prevention reaction member, and FIGS. 2 (a) to 2 (f) relating to the present invention. 3A to 3E are process diagrams showing the operating state of each component of the inclined shaft excavating device shown upright to show the steps of the excavation method and the assembly procedure of the slip-prevention reaction member, and FIGS. In order to show the steps of the excavation method according to another embodiment, the operation state of each component of the inclined shaft excavating device shown in an upright state and the process chart showing the assembling procedure of the slip-prevention reaction force member, and FIG. 4 are the inclined shaft and the present invention. FIG. 3 is a schematic view showing the overall situation of the inclined shaft excavating device according to the embodiment of FIG. S: Diagonal excavator, A: Front body, B: Middle body, C
...... Base barrel, D ...... Anti-slip reaction force member, 1 ...... Thrust jack, 2 ...... Shield jack (direct acting cylinder), 2a ...... Shield jack base end, 7 ...... Hydraulic motor (drive) Equipment), 30 …… Cutter head part (excavation means), 20,21 …… Outer wall, 23 …… Front wall part (outer wall), 24 ……
Rear wall (outer wall).

Front page continuation (72) Inventor Takehisa Koike 1-3-3 Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Tokyo Metropolitan Electric Power Co., Inc. (72) Inventor Mamoru Konishi 1-3-10 Moto-Akasaka, Minato-ku, Tokyo Stock market Company Okumura Gumi Tokyo Branch (72) Inventor Jiro Kawabe 1-3-10 Moto-Akasaka, Minato-ku, Tokyo Stock Company Okumura Gumi Tokyo Branch (72) Inventor Kozo Sakoi 3-chome Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo No. 1 Kawasaki Heavy Industries, Ltd. Kobe factory (72) Inventor Kazuo Fujioka 3-1-1, Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Prefecture Kawasaki Heavy Industries Ltd., Kobe factory (72) Inventor Aritaka Fukuda Kobe, Hyogo Prefecture 3-1-1 Higashikawasaki-cho, Chuo-ku Kawasaki Heavy Industries, Ltd. Kobe factory (72) Inventor Kazunori Yamanaka 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe, Hyogo Prefecture Kawasaki Heavy Industries Ltd. Kobe factory

Claims (3)

[Claims] 1. A front part of the apparatus is provided with a digging means for digging by abutting against the ground on the front side, and a drive device for driving the digging means behind the digging means, the outer surface of which is covered by a cylindrical outer wall. An oblique excavation device for excavating the natural ground in front of the device by the operation of the excavation device and the expansion and contraction movement of a direct-acting cylinder that presses the excavation device in the direction of excavation, comprising: (a). At the base of the inclined shaft excavating device, the direct-acting cylinder has its base end abutted and supported by a slip-prevention reaction force member continuously provided along the tunnel inner peripheral wall from the tunnel entrance, Arrange a plurality of (b). When excavating the plurality of direct-acting cylinders, all of the plurality of direct-acting hydraulic cylinders expand at the same time, and at the time of contracting, some of them contract first, An inclined shaft excavating device, which is provided with a control means for controlling so that the remaining parts contract. 2. An excavation means for excavating the front surface of the apparatus in contact with a natural ground, and a drive device for driving the excavation means behind the excavation means, the outer surface of which is a cylindrical outer wall. An oblique excavation device for excavating the natural ground in front of the device by the operation of the excavation device and the expansion and contraction movement of a direct-acting cylinder that presses the excavation device in the direction of excavation, comprising: (a). A plurality of thrust jacks composed of direct-acting cylinders are arranged between the front part of the device provided with the excavating means and the drive device and the base part at the rear of the device, and the front part can be projected and retracted rearwardly. It is supported at the base, and (b). A plurality of shield jacks composed of direct-acting cylinders are attached to the base so that the base ends of the shield jacks come into contact with and are supported by a slip-prevention reaction force member continuously provided along the tunnel inner peripheral wall from the tunnel entrance. Main arrangement, (c). When excavating the thrust jack and the shield jack, first, in a contracted state of the shield jack, the thrust jack extends and the front portion projects with respect to the base portion, and then the contraction speed and An inclined shaft excavating device, comprising control means for controlling the thrust jack to contract and the shield jack to extend so that the extension speeds become equal. 3. A front part is provided with an excavating means for excavating in contact with the ground in front of the excavating means, and a drive device for driving the excavating means behind the excavating means, and the drive means is pressed against the base in the excavation direction. A plurality of direct-acting cylinders are arranged so that their base ends are in contact with and supported by a slip-prevention reaction force member continuously provided along the tunnel inner peripheral wall from the tunnel entrance. Is a method of excavating an inclined shaft using (a). When excavating, with the base end of the device in contact with and supported by the slip-prevention reaction force member behind the device, the excavation means is actuated and a plurality of the direct-acting cylinders are simultaneously extended to advance the front face. Excavate the ground and move forward,
(B). When excavating by the stroke of the direct acting cylinder, (c). A part of the plurality of the direct acting cylinders is contracted, and (d). An anti-slip reaction force member is assembled along the inner wall of the tunnel inner wall portion where the contracted space is formed, and (e). (F). Next, the remaining direct acting cylinders of the plurality of cylinders are contracted, and (g). Similarly, each step of assembling a slip-prevention reaction force member in the part where the space is formed by contraction is included, and it is always a part of the plurality of direct-acting cylinders of the oblique excavation equipment. The sloped excavation method is characterized in that the base end side is in contact with and supported by a reaction force member for preventing slippage.