JP2834332B2 - Hori Susumu shield - Google Patents

Abstract

Driving shield machines are known in the construction of tunnels through unconsolidated rock; in these known machines, the working face is shored up by supporting fluid in a working chamber of the driving shield machine sealed off from the tunnel. With these known driving shield machines, unconsolidated rock can fall out of control into the entire working chamber if the working face collapses during the tunnelling process and thus seriously jeopardize the safety of men working in the tunnel. To reduce this risk considerably, the driving shield machine according to the invention is provided with a partition (40) which can slide longitudinally and divides the working chamber (3) into two partial chambers (3', 3''). An aperture (52) is provided in the partition (40) and a tunnelling arm (10) extends through the aperture, which is designed so as not to restrict the mobility of the tunnelling arm (10). Since the partition can slide into a position adjacent to the working face, the latter can be given additional mechanical support if a collapse seems likely, without any need to interrupt the tunnelling process and provide support using the support fluid.

Description

The invention relates to a moat shield of the type corresponding to the preamble of claim 1.

For decades to build tunnels in fragile rock,
Shield moating devices can be used. More recently, moating shields have been developed for this purpose which support the tunnel face with fluid. Such a moat shield allows the tunnel cross-section on unstable ground to be excavated extensively within groundwater levels without compressed air, injection or freezing. Such a moat shield has a pressure chamber for the supporting fluid, which is provided with a partition wall toward the tunnel, and the pressure of the supporting fluid is adjusted in accordance with the earth pressure and water pressure generated at each time. Will be maintained. As a supporting fluid, a thixotropic liquid, usually a bentonite suspension, is used. This bentonite suspension penetrates the debris from the tunnel face to a certain depth depending on the type of brittle rock. The rock layer (so-called filter cake) permeated with the bentonite suspension stabilizes the tunnel face. This reliably prevents the rock from falling from the tunnel face without any means.

Rock on the surface of the tunnel face is broken by a mechanical drilling rig and pumped through a pipeline to a separation facility outside the tunnel space. Here the rock and bentonite suspension are separated. In some cases, by adding a new bentonite suspension, the supporting fluid is adapted to the conditions of the rock exposed on the tunnel face, and then the supporting fluid is newly supplied to the drilling chamber.

Based on this principle, German Patent Publication DE-PS 24 31 5
The following Horishin shields are known from No. 21: With this moat shield, the rock is broken or excavated by a cutter head rotatably supported by a drill arm that is rotatable in all directions, and is excavated and sucked directly at the cutter head.
From there, it is carried backwards from the excavation room of the Hori Susumu shield.

The advantage of this moat shield is that the support fluid will only be soiled in this area since it will only contact the broken rock in the direct cutting area. In all other areas of the drilling room, the supporting fluid is not affected by the collapsed rock, so it does not mix with the rock and does not carry the rock. This means that the supporting fluid keeps its supporting and sealing properties longer than in previously known moat shields, so that it is not necessary to replace or replenish it to a certain extent, so that German Patent Publication DE-PS The moat shield known from 24 31 521 is distinguished by a low operating cost during use.

Due to these advantages, moat shields based on this principle are often used today for tunnel construction in brittle rocks. This type of moat shield is known, for example, from the brochure "Sixis Shield 'System Holtzmann'" by Philip Holtzmann. In this moat shield, a digging arm having a rotatable cutter head is additionally nested. This, on the one hand, makes it possible, on the one hand, to excavate the tunnel face in a pre-programmable, very precise, layer-by-layer manner, while, on the other hand, free-cutting obstacles, for example, hard rock masses, so-called boulders Because it is possible. After the free-cutting, the boulders are transported by hand through human locks from the excavation room of the moat shield and subsequently carried out.

However, a disadvantage of this device is that not only for the removal of boulders, but also for maintenance or repair work on the drilling arm and the cutter head, the thixotropic fluid is at least partially removed from the drilling chamber along the surface of the tunnel face. It must be lowered and replaced with another fluid medium, such as compressed air or water, which allows a person to reach the drilling room. Since there is no support for thixotropic fluids in this area, the basic point is that during the work, the danger of ground collapse and breakage (Ausblaeser) increases,
Collapsed and broken holes in the ground can put them in high danger during the input of maintenance personnel. These dangers are also not completely eliminated by using tunnel face shields before the thixotropic stream descends. because,
This is because the shield does not completely cover the tunnel face.

Another drawback of this moat shield is that if the tunnel face collapses during the excavation process, despite the supporting fluid, the brittle rock will fall through the entire excavation chamber without help. is there. Such a collapse of the tunnel face represents a danger to workers working in the tunnel, as it can lead to serious damage or even breakage of the drilling shield.

Accordingly, the Horishin shield of the present invention has been improved so that, on the one hand, the work for removing boulders from the excavation room of the Horishin shield and the maintenance work of the workers can be performed without the need for the descent of the thixotropic fluid. The task of doing so is the basis of the present invention.

This object is achieved by a moat shield as claimed in claim 1.

In the moating shield of the present invention, the excavation room is provided with a partition wall movable in the longitudinal direction of the moating shield between the lateral wall and the tunnel face, and the partition wall is provided at a non-pressure portion of the tunnel. On the other hand, it extends substantially parallel to the lateral wall that defines the excavation chamber, and extends so as to cover at least a large part of the inner cross section of the sealing side surface. In other words, in the moat shield of the present invention, a partition wall movable in the longitudinal direction is provided, and the partition wall divides the excavation chamber into two half spaces, and the volume of this half space is It is variable because the wall can move. An opening is provided in the partition wall, and an excavator extending to the tunnel face passes through the opening. The opening is configured so as not to hinder the mobility of the excavator.

During the excavation process, the partition wall is usually located near the lateral wall, and the excavation process at the tunnel face is performed in a known manner. If there is a risk of collapsing the tunnel face, the partition wall is moved to a position close to the side wall. The movement does not require interruption of the drilling process under the support of the thixotropic fluid. Should the tunnel face collapse, the fragile rock will not fall into the entire excavation room without action due to the disadvantageous effects described above. If necessary due to the nature of the ground, the moat shield of the present invention allows the partition wall to continuously follow the tunnel face as the tunnel face advances. Due to this, the volume of the excavation room in front of the tunnel face where the fragile rock falls when it collapses,
It is kept small during the entire excavation process.

Another advantage of the movable partition wall is that the moat shield of the present invention allows the elimination of additional mechanical gallery face shields that support the gallery face when needed. This is because the partition wall can be pressed against the tunnel face, if necessary, after an interruption of the excavation process, to mechanically stabilize the tunnel face. In this position of the partition, the thixotropic fluid can be removed from the drilling chamber without danger, so that the drilling chamber can be used for maintenance or repair work or for transporting boulders.

A preferred embodiment of the moat shield has the features of claim 2. Move the drilling rig backwards, close the opening,
After lowering or removing the thixotropic fluid, this embodiment allows the operator to perform maintenance or correction work at the front end of the drilling rig without danger.

In a preferred embodiment according to claim 3, the partition wall is selectively contacted with the inner surface of the shield side wall,
A sealing element is provided which can seal the half spaces separated by the cutting wall from each other. Such a structure of the moat shield allows the hydrostatic pressure of the thixotropic fluid at the tunnel face to be maintained, even if maintenance operations require the support fluid to be lowered or replaced by another fluid medium.

In a preferred embodiment, the sealing element is formed as a hydraulically or pneumatically actuatable tube packing.

Claim 5 To enhance the safety of workers working in the drilling room.
It is preferred to provide a closure element which can fix the partition wall in close proximity to the tunnel face, as described in paragraph (1).

 A preferred configuration of the closure element is the subject of claim 6.

In a preferred embodiment, the drilling rig comprises at least one longitudinally adjustable drilling arm rotatably mounted on the transverse wall while sealing, the drilling arm being used for debris material. Rotatable cutter head, which can be moved during operation to any point on the gallery face in the support medium contained in the drilling chamber and under pressure. With such a structure of the moating shield, a high excavating ability is achieved, and an obstacle generated at the tunnel face is appropriately cut.

A suitable opening for the drilling rig having a drilling arm with a rotatable cutter head to pass therethrough is formed in an elongated hole shape, and the partition wall is supported rotatably about the central axis of the moating shield. ing. (Claim 8).

10. The drilling arm according to claim 9 wherein the drilling shield of the present invention allows a larger bore diameter to be formed without the need for excessively high structural costs for the drilling arm and its support. A forward shield configuration is preferred.
With this measure, the excavation arm in the case of the moating shield is supported rotatably in all directions in the central region of the lateral wall of the moating shield. On the one hand, it can be made significantly shorter than the drilling arm of a conventional moat shield. Indeed, also, the range of adjustment of the length of the drilling arm can be reduced to almost half the figure for a conventional moat shield drilling arm, which already significantly reduces the manufacturing costs of the drilling arm. Furthermore, the possibility of pivoting the excavating arm about the pivot axis is necessary. This is because by rotating the support plate and pivoting the excavation arm about the pivot axis and correspondingly changing the length of the excavation arm, any part of the tunnel face is brought to the end of the excavation arm. This is because they can be approached by the cutter head provided in.

In a particularly preferred embodiment of the moat shield according to claim 10, the excavating arm can be pivoted about only one pivot axis. This is because this measure makes it possible to particularly easily and robustly support the excavating arm on the side wall.

Particularly preferred configurations of the drilling sleeve with respect to the orientation of the drive shaft and the location of the support of the digging arm on the support plate are the subject of claims 11 and 12. By such measures, the overall length required for the desired bore diameter and the adjustability of the length of the drilling arm can be minimized.

When the partition wall is mounted on the circular support plate so as not to rotate, the partition wall may not be further rotatably mounted, and in that case, the movability of the excavating arm is not restricted. .

In the case of the moat shield according to the present invention as set forth in claim 14, a work chamber is provided within the support opening provided in the lateral wall while being movable while being sealed with respect to the support opening. The shield is sealed by at least one double lock against the pressureless rear of the advancing shield, has a downward opening, and communicates with the drilling chamber through the opening when pushed into the drilling chamber. ing. The working chamber may be placed under pressure with a fluid medium suitable for operator input, usually compressed air or water. When it is necessary to input a worker into the drilling room for maintenance of the cutter head or for removal of boulders, a liquid condition suitable for the input of the worker under a pressure corresponding to the pressure of the supporting medium. Work room is filled. next,
The working chamber can be moved into the digging chamber with the opening facing downwards open, without the support medium penetrating into the digging chamber. Thus, since the support medium does not have to be removed or lowered from the drilling chamber, the support action of the support medium is maintained and the desired activity can be performed through the downwardly directed opening of the working chamber. There is no need to support the tunnel face separately by the partition walls for the activity.

The maintenance or repair work of the cutter head is particularly easily performed when the opening has a suitable size for introducing the cutter head. This is because this allows the operator to directly perform an operation inside the work room (claim 15).

The features of claims 16 and 17 have a particularly preferred arrangement of the support openings. The support opening is provided on the support plate eccentrically with respect to the central axis of the moat shield, and on the other hand, the cutter head below the opening of the work chamber can be introduced without any problems when the work room is pushed in. On the other hand, for the support of the rotatable drilling arm,
And the space required for the connection of the pipeline carrying the excavated rock can be restricted to a minimum by the working room.

In a particularly preferred embodiment of the moat shield according to claim 18, the support surface of the support opening facing the opening of the working chamber is such that the support opening is substantially outside the drilling chamber. In the position of the chamber, it completely covers the opening of the working chamber and closes sealingly to the surroundings. As a result of this measure, the working chamber can already be filled with a fluid medium, for example compressed air or water, which allows the input of personnel. Then, before the work room is introduced into the excavation room while opening its own opening, the worker can already enter the work room through the human lock.

As described in claim 19, when the movement axis of the working chamber extends in the direction of the central axis of the moating shield,
In a preferred embodiment of the present invention, the end wall of the working chamber facing the gallery face can be dimensioned such that this end wall forms a partition dividing the half space of the drilling room. In this case, due to the movement of the partition wall and the work room, only one
The need for two drives reduces the structural cost of the moat shield. In addition, workers in the work room
Inevitably, maintenance and correction work is performed with maximum safety, since the partition walls are always protected against the continuous collapse of the tunnel face.

Preferably, a hydraulic cylinder is used to move the working chamber and thus the partition wall in the direction of the central axis of the moat shield.

Free-cutting obstacles, so-called boulders and, if necessary, matching cutter heads are removed in a simple manner from the digging chamber by a gripper that can be lowered through the opening in the working chamber. This is when the means is provided (claim 22).

Not only to support the tunnel face, but also to secure the space in the excavation room behind the tunnel face, the partition wall is used because the partition wall is located on the end face facing the tunnel face. It is time to have excavation means. At this time, the material on the surface of the tunnel face can be excavated in a wide range by the partition wall itself.

Similarly, the partition wall is provided with a closable consolidation opening arranged over the diameter of the partition wall, and in the case of interruption of the drilling operation, the tunnel of the individual consolidation holes through the consolidation opening. Preferably, it can be formed in a face.

Furthermore, it is preferred that a nozzle can be provided on the side of the partition wall facing the tunnel face, which nozzle is used for externally entering the fluid medium between the partition wall and the tunnel face. Injection of the fluid medium may facilitate moving the partition wall rearward from the tunnel face. This is because the "suction effect", if any, occurs between the partition wall and the tunnel face.

The drawing schematically shows one embodiment of the invention.

FIG. 1 is a longitudinal sectional view of a moat shield of the present invention, in which various possible positions of a digging arm, a partition wall and a working chamber are indicated by broken lines.

FIG. 2 is a view of the moat shield viewed from the direction of the tunnel face (A in FIG. 1).

When referring to "before" below, the designation is shown on the left side of FIG. 1 and relates to the side of the moat shield facing the tunnel face, and accordingly, the designation "rear" refers to the moat shield. Regarding the side separated from the tunnel face. The designations "up" and "down" relate to the vertical drive position of the moat shield shown in the drawing.

The moat shield, generally designated 100 in the drawings, has a tubular shield sidewall 1. This shield side wall 1 has a lateral wall 2 in its central region, which separates the front excavation chamber 3 from the rear part 4 of the moat shield 100. The excavation room 3 at the front reaches the tunnel face 5 directly forward,
The excavation chamber 3 is filled with a support medium, for example, a thixotropic rope fluid, during the excavation drive. For this thixotropic fluid, a supply (not shown) is provided on the lateral wall. In order to be able to keep the pressure of the supporting fluid significantly constant in the drilling chamber 3,
A compensation chamber 39 is provided in which a compressible medium, for example air, is applied under a preselected pressure. The compensation chamber 39 is partially filled with a supporting fluid. Since the compensation chamber 39 is in communication with the excavation chamber 3, a support fluid exchange can occur between the excavation chambers 3 to compensate for changes in volume of the excavation chamber 3. When the volume change of the drilling chamber becomes large or the supporting fluid is considerably lost by the tunnel face, the pressure in the drilling chamber 3 is adjusted by additionally pumping or sucking the supporting fluid via the supply. be able to.

A support plate 8 is rotatably mounted on the lateral wall 2 via a ball bearing 7 symmetrically with respect to the central axis M of the moat shield 100, and the lateral wall 2 is sealed by a sealing ring 9.
Sealed against. The hydraulic motor 6 is used for driving the support plate 8 to rotate.

Offset from the central axis M by a half excavation radius, an excavation arm 10 is provided for excavating or breaking rock exposed at the tunnel face. The excavating arm 10 has a cutter head 11 rotatable about a longitudinal axis L of the excavating arm, and is supported by a support plate so as to be rotatable about a rotation axis by a joint device 12. This pivot axis is, on the one hand, parallel to the plane of the support plate 8 facing the gallery face, and, on the other hand, a straight line extending radially from the center of rotation of the support plate and intersecting the longitudinal axis L of the excavating arm. At right angles to The rotation of the excavating arm 10 is performed by a hydraulic cylinder 13 provided on the back side of the support plate 8. The rear end 14 of the drilling arm 10 is the support plate 8
Through an opening formed in the support plate 8
It is guided through 15 to the rear part 4 of the moat shield 100. For sealing purposes, the part of the drilling arm 10 in the area of the opening is designed as a spherical enlargement 16 and is sealed against the support plate 8 by an annular sealing device 17.

In the embodiment shown in the drawings of the moat shield 100 of the present invention, the excavating arm has two arm portions 10 ', 10 "which telescopically engage. As can be seen in the various positions shown in broken lines in FIG. 1, the length of the digging arm can be changed by means of the arm portions 10 ', 10 ", for example by means of a hydraulic pressure adjustment member not shown in the drawing. .

A suction pipe 18 reaching the rear end 14 of the drilling arm 10 extends through the drilling arm 10 and the cutter head 11 and directly receives and supplies excavated debris (Bodenmaterial) at the drilling or cutting point. Combined with pump. Although not shown, the supply pump is provided at the rear end 14 of the moat shield 100.

Above the digging arm 10, the support plate 8 is
hrungsachse). A support opening 20 is formed in this area, and this support opening 20 is used for supporting a work chamber 21 movable within the support opening 20 along the movement axis V. When the support plate 8 is in the position shown in the drawing, the movement axis V is above and extends parallel to the central axis M of the moating shield.

The working chamber 21 has a partially cylindrical housing 22, which is provided with a downwardly facing opening 25 in a front region 24. The area 26 behind the work chamber 21 is formed as a double lock 27 for humans. The working chamber 21 is
It is connected to a device (also not shown) for applying a fluid medium, for example compressed air or water, which allows a person to enter and leave the working chamber 21. While the working chamber 21 is in the rear position shown by the solid line in FIG.
A packing ring 29 which is completely covered by a support surface 28 below the 20 and extends over the entire peripheral surface of the housing 22 of the working chamber 21
Thus, the excavation chamber 3 and the rear part 4 of the moat shield are hermetically sealed. In this position of the work room 21, the worker can reach the area 24 in front of the work room 21 through the double lock 27. Subsequently, the working chamber 21 can be filled with a suitable fluid medium under a pressure corresponding to the pressure of the supporting fluid in the drilling chamber 3. The working chamber 21 can then be moved by means of a feed cylinder (Vor-schubzylinder) 30 provided at the center thereof to the position shown in dashed lines in FIG. The part 25 is open. At this time, as also indicated by the dashed line, the cutter is provided at the front end of the drilling arm through the opening by pivoting the drilling arm and adapting the length of the drilling arm accordingly. The head is inserted into the working room.

Since the fluid medium in the working chamber has the same pressure as the supporting medium in the drilling chamber that supports the tunnel face 5, this supporting medium does not penetrate the working chamber 21 which is only open downwards, or Even if it enters, it is very slight. The operator can perform maintenance work or repair work on the cutter head without having to lower the supporting fluid in the drilling room 3.

In a region 24 in front of the work chamber 21, a gripping means 31 which can be lowered through an opening of the front region 24 is further provided,
This gripping means 31 is provided for picking up disassembled cutter heads or larger waste not shown in the drawing.

The housing 22 of the working chamber 21 has a heavy forward end face 32 which extends beyond the outer peripheral surface of the partially cylindrical housing 22 and, except for the narrow outer annular gap 41, the shield side wall. 1 so as to cover the entire inside cross section of the first. Therefore, the partition wall (Tren
n-wand) 40 is formed. This partition wall 40 divides the excavation room 3 into two half spaces (Halbraeume) 3 ', 3 ".
One elongated hole-shaped opening 42 extending from the center region to the outside in the radial direction is formed in 40. The excavation arm 10 is rotatable along the opening 42. A movable partition wall (Schott) is provided in a flat hollow space 43 provided inside the partition wall and extending parallel to the surface of the partition wall 40.
wand) 44 are provided. This partition 44 defines the opening 42 on both sides after the partition wall has moved toward the tunnel face and the excavating arm 10 has been pivoted upward out of the opening.
It is movable in the opening 42 while being guided in the pair of grooves 45. The hydraulic cylinder 46 provided on the partition wall 40 is used for this movement. Along the outer edge 47 of the partition wall 40, the annular groove 48 is provided with a sealing element 49, which is formed as a hydraulically or pneumatically actuatable tube packing. Further, a plurality of fixing bolts 50 are disposed on the side of the partition wall 40 facing the side wall 2 and are movable across the outer edge 47 of the partition wall in the radial direction over the peripheral surface of the partition wall 40. Is provided. These fixing bolts 50 are used for fixing at a position immediately close to the tunnel face 5 as shown by a broken line in FIG. For this purpose, the shield side wall 1 has a step-shaped reduced diameter portion 51 extending radially over the inner peripheral surface of the shield side wall 1 in the region of the front edge where the shield cutter 39 is formed.
Has such a size that the height substantially closes the annular gap 41 at a position in front of the partition wall 40. An annular groove 52 is formed in the reduced diameter portion 51. Although the partition wall is fixed in the longitudinal direction of the moat shield, the fixing bolt 50 is rotatable about the central axis M of the upper moat shield.
Can be engaged with the annular groove 52. In front of the annular groove 52, the reduced diameter portion has a sealing surface 53 with which the activated sealing element cooperates.

Above the working chamber 21, on the fixed part 2 'of the side wall 2,
A double lock 35 for people is further provided. If necessary, the operator can reach the excavation chamber 3 directly through the lock 35 after the partition wall has been moved to the forward position and after the supporting fluid has dropped. Below the fixed part 2 ′ of the lateral wall 2, a stone lock 36 is further provided. This stone lock
Through 36, larger waste can be carried to the rear 4 of the moat shield.

The moating of the moating shield 100 takes place via a hydraulic feed cylinder 37 acting on the fixed part 2 'of the transverse wall 2, the other end of which bears on the end face of the existing tabbing or support. . During rock excavation, the moat shield is continuously pushed forward, or excavation and advancement are performed in sequence. At this time, an important promotion of moating is achieved because the ground is firstly cut only along the leading edge of the shield side wall 1 forming the shield cutter 39,
To that end, the cutter head 11 is brought to the exposed position shown in dashed lines in FIG. 1 and subsequently moved along the shield cutter by rotation of the support plate. This step is generally performed by a partition wall located at a position behind the partition wall. However, if there is an imminent danger of collapse of the tunnel face,
Is moved to the front position during the excavation process,
Thus, it is possible to prevent the moat shield from moving in the longitudinal direction. By this, the partition wall
All parts of the Hori Susumu shield behind the 40 are prevented from a series of collapses. After the rocks (Gesteinmaterial) have been cut by the dubbing width along the shield cutter, another dubbing or support 38 can already be provided, while the excavating arm 20 is correspondingly turned. By pivoting the support plate 8, a central part which is still present in the center of the tunnel face is excavated. This is also possible at two locations on the partition wall 40.

In the moat shield 100, the excavating arm 3 is easy for the operator to use in various ways.

On the other hand, as described above, the worker can reach the excavation room 3 through the work room 21 and work in the section of the moat shield 100 from the opening 25 to the work room 21. In this process, the supporting action of the thixotropic support fluid must not be omitted, but the amount of work that can be performed is limited by the inability of the worker to leave the work chamber 21.

Alternatively, the work chamber 21 is, first of all, a partition wall 40,
It is moved to the excavation room 3 until it can be fixed at its own forward position by the fixing bolt 50 and the annular groove 52. Sealing element 49
Is activated, the thixotropic support fluid in the rear half space 3 "can be lowered or removed,
In this case, the half space 3 'in front of the partition wall 40
The support effect that remains at all times is not reduced. The half space 3 ″ of the drilling room 3 that is now available to workers
The fluid medium, which can be made free of pressure during the maintenance work, or which, for safety reasons, allows the worker to work under a pressure corresponding to the pressure of the supporting fluid in the half space 3 ', Supplied.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Heinrichs, Albrecht, DE-41812 Erkelenz, Heinrich-Plum-Bäck 12 (56) References JP-A-58-44195 (JP, A) JP-B-58-43557 (JP, B2) JP-B-45-3751 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) E21D 9/06 301 E21D 9/06 302 E21D 9 / 08

Claims (25)

(57) [Claims] 1. Excavation which is sealed at the rear by a transverse wall (2) at the front of a shield side wall (1) forming the outer housing wall of a moat shield and is demarcated at the front by a tunnel face (5). Room (3) and this excavation room (3)
A drilling rig provided for drilling debris material exposed at the tunnel face, and being operatively included in the drilling chamber and movable in a support medium under pressure. The excavation chamber (3) is provided with a partition wall (40) that is movable in the longitudinal direction of the moat shield between the lateral wall and the tunnel face. (40) allows movement of the drilling rig and has an opening through which the drilling rig passes and extends substantially parallel to the transverse wall (2) and at least defines the inner cross-section of the sealing side surface (1). Hori Susumu shield, which is largely covered. 2. The excavator is capable of moving backward from an opening (42) of the partition wall (40) at least at a position of the partition wall (40) immediately adjacent to the tunnel face (5). Yes, this opening (42) can be closed,
The moat shield according to claim 1, wherein: 3. An outer edge (47) of the partition wall (40) is sealed with an inner surface of the sealing side surface (1) at least at a position of the partition wall (40) immediately adjacent to the tunnel face (5). 3. A moat shield according to claim 2, further comprising means capable of performing the following operations. 4. Said means is a sealing element (49) formed as a hydraulically or pneumatically operable tube packing, said sealing element (49) being selectively engaged with the inner surface of said sealing side (1). Is possible and in the activated state,
The moat shield according to claim 3, characterized in that the half spaces (3 ', 3 ") of the excavation chamber (3) divided by the partition wall (40) are sealed with each other. 5. A closing element (50, 52) which can fix the partition wall (40) at least at a position immediately adjacent to the gallery face (5). The moat shield according to any one of claims 1 to 4. 6. The closing element comprises a closing bolt (50) provided around the peripheral surface of the partition wall, and the closing bolt (50) is formed on an inner peripheral surface of the sealing side surface (1). The moat shield according to claim 5, characterized in that the shield is engageable with the annular groove (52). 7. The side wall (2) while the excavator is sealed.
At least one longitudinally adjustable excavating arm (10) rotatably mounted on the excavating arm (10) having a rotatable cutter head (11) for debris material; The cutter head (11) can be moved during operation to any point of the tunnel face (5) in a support medium contained in the drilling chamber (3) and under pressure;
The moat shield according to any one of claims 1 to 6, wherein: 8. The opening (4) through which the excavator passes.
The moat of claim 7, wherein 2) is formed in a long hole shape, and the partition wall is rotatable about a central axis (M) of the moat shield (100). shield. 9. The at least one excavating arm (10) is mounted on a circular support plate (8) outside the center so as to be rotatable about at least one pivot axis. A moat shield according to claim 8, characterized in that the plate (8) is rotatably mounted about the central axis (M) on the lateral wall (2) in a sealing manner. 10. The moat shield according to claim 9, wherein the at least one excavating arm is rotatable about exactly one pivot axis. 11. The pivot axis, on the one hand, is parallel to the plane of the support plate (8) facing the tunnel face (5), and, on the other hand, extends radially from the center of rotation of the support plate. A moat shield according to claim 10, characterized in that it extends at right angles to a straight line intersecting the longitudinal axis (L) of each excavating arm (10). 12. The excavating arm (10) is provided on the support plate (8) so as to be shifted outward from the central axis (M) of the moating shield (100) by a substantially half hole radius. The moat shield according to claim 9, wherein: 13. The partition wall (40) is mounted on a circular support plate (8) so as not to rotate.
The moat shield according to any one of claims 10 to 12, wherein: 14. A support opening (20) provided in said lateral wall.
Within the support opening (20) in a sealingly supported manner and can be pushed into the excavation chamber (3) along a movement axis from a position substantially outside the excavation chamber (3). A working chamber (21) which can be placed under pressure by a fluid medium and which is sealed against the pressureless rear (4) of said moat shield (100) by at least one double lock (27). The working chamber (21) has a downward opening (25), and when the working chamber (21) is pushed into the excavating chamber, the working chamber (21) communicates with the excavating chamber via the opening (25). The moat shield according to any one of claims 1 to 13, wherein: 15. The moat shield according to claim 14, wherein the opening (25) has a size suitable for introducing the cutter head (11). 16. The support plate according to claim 14, wherein said support opening is provided in said support plate.
Or the moat shield described in 15. 17. The moat shield according to claim 16, wherein the support opening (20) is provided eccentrically with respect to a central axis (M) of the moat shield (100). 18. A support surface (28) of the support opening (20) facing the opening (25) of the work chamber (21) is provided in the excavation chamber (3) of the work chamber (21). 18), wherein the opening (25) is completely covered and the working chamber (21) is hermetically closed with respect to the surroundings at a position substantially outside of the above). Hori Susumu shield according to item 1. 19. The moat shield according to claim 14, wherein the moving axis (V) extends in the direction of the central axis (M) of the moat shield. 20. A method according to claim 14, wherein the end wall of the working chamber facing the tunnel face (5) forms a partition wall (40). Hori Susumu shield. 21. A hydraulic cylinder (30) for moving said working chamber.
The moat shield described in any one of the above. 22. The work chamber (21) is provided with a cutter head (11) or a gripping means (31) for picking up a larger waste, which can be lowered through an opening (25) therethrough. The moat shield according to any one of claims 14 to 21, wherein the moat shield is provided. 23. The moat shield according to claim 1, wherein an excavation means is provided on an end face of the partition wall facing the tunnel face. . 24. The method according to claim 1, wherein the partition wall is provided with a closable solidification opening disposed over the diameter of the partition wall. To 23
The moat shield described in any one of the above. 25. The nozzle according to claim 1, wherein a nozzle for injecting a fluid medium is provided on a side of the partition wall facing the tunnel face. Hori Susumu shield according to any one of the above.