JP4754381B2 - Shield for tunnel mine - Google Patents

Description

The present invention relates to蔽体shielding for the tunnel pits.

  There are various tunnel forming methods that form a tunnel by excavating the natural ground forward, but there is a scene where dust is generated in any of the methods, and removal of this dust is a problem.

In one example, if the drilling of tunnel formed by such blasting and excavating machines perform concrete spraying work, a large amount of dust containing having a large grain size dust is generated for blowing cement by mass of the air, the Dust diffuses.

  For this reason, a dust collector using a wet filter or dry filter, etc., is placed near the concrete spraying work site, a dust suppressant is mixed into the cement, or a ventilation method is devised. Various measures have been taken, such as doing so, but none of them was decisive for removing dust.

Therefore, the applicant has proposed a tunnel forming method capable of efficiently removing dust before it diffuses throughout the tunnel tunnel , as described in JP-A-11-324597 (Patent Document 1).

Japanese Patent Laid-Open No. 11-324597

The present invention was completed as a result of various researches aimed at further improving safety and workability based on the above-mentioned Patent Document 1, and it is efficiently removed before dust is diffused throughout the tunnel mine. Needless to say, the present invention provides a tunnel tunnel covering body that is excellent in practicality and capable of confirming a work location through a dustproof sheet.

  The gist of the present invention will be described with reference to the accompanying drawings.

The A shield X of tunnel pits for partitioning the dust generating space 3 containing dust generation portion 2 in the tunnel pits 1 formed by drilling progresses forwardly natural ground, the shield X is dustproof sheet 4 between is composed of a frame 5 for supporting the dustproof sheet 4, the dust-proof sheet 4 consists of a transparency material, also, the shield X is said dusting portion 2 and the driver's seat of the tunnel construction apparatus Further, the shield X is divided into an upper right side, an upper left side, a right side, and a left side of the tunnel construction device. The upper right side shield Xa and the upper left side shield Xb are , Arranged to be orthogonal to the tunnel length direction and configured to switch from a function exhibiting state of partitioning the dust generation space 3 to a non-functioning state of polymerizing each other and not partitioning the dust generation space 3, and , Right shield X The left shield Xc is arranged so as to be orthogonal to the tunnel length direction and functions to partition the dust generation space 3, and is attached to the side surface of the tunnel construction device to partition the dust generation space 3. The present invention relates to a shield for a tunnel mine , characterized in that it can be switched to a non-functioning state .

Further, in the shield for a tunnel mine according to claim 1, communication that communicates with a dust removing device 6 that sucks dust-containing air containing dust generated at the dust generation location 2 and exhausts it out of the dust generation space 3. The present invention relates to a shield for a tunnel mine , characterized in that a portion 8 is provided.

Further, in the shield for a tunnel pit according to any one of claims 1, wherein the dustproof sheet 4, according to the shield of the tunnel pits, characterized in that all is made of a transparent material Is.

Moreover, the shield for tunnel tunnels of any one of Claims 1-3 WHEREIN : The said tunnel construction apparatus is a concrete spraying apparatus 9, It concerns on the shield for tunnel tunnels characterized by the above-mentioned. .

The shield for a tunnel mine according to any one of claims 1 to 4 , wherein the frame body 5 includes a support column 11, a frame member 12 supported by the support column 11, and a reinforcement of the frame member 12. The present invention relates to a shield for a tunnel mine characterized by comprising a crosspiece 13 to be formed .

Further, in the shield for a tunnel pit according to claim 5 Symbol mounting, the frame 5 of the upper right-hand shield Xa and upper left shield Xb is lower ends of the strut 11 is of the tunnel construction device fitted The present invention relates to a shield for a tunnel mine characterized by being set to fitting convex portions 16 and 17 that are respectively fitted to the concave portions 20 .

Further, in the shield for a tunnel tunnel according to any one of claims 5 and 6, the frame body 5 of the left shield Xc and the right shield Xd is connected to the tunnel 11 at a center portion of the column 11. According to a shield for a tunnel mine , characterized in that a fitting body 26 having fitting recesses 18 and 19 to be fitted respectively to the fitting projections 21 for the left side and the right side of the construction apparatus is provided. Is.

Since the present invention is configured as described above, the dust is confined in the dust generation space and can be efficiently removed before the dust diffuses throughout the tunnel tunnel. It has excellent practicality for checking mountain conditions, lighting, surveying, etc., and is a cover for tunnel tunnels .

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

Dust generated from the dust generation location 2 is prevented from diffusing out of the dust generation space 3 partitioned by the shield X. Therefore, by removing the dust-containing dust air with a high dust concentration in the dust generation space 3 by, for example, the dust removal device 6 that sucks and cleans the dust-containing air and exhausts it outside the dust generation space 3. It becomes possible to remove dust very efficiently before the dust diffuses throughout the tunnel mine 3.

  Further, since at least a part of the dustproof sheet 4 is transparent, it is possible to check the state of concrete spraying work and the state of natural ground without entering the dust generation space 3 through this transparent part. The amount of dust suction by the person can be reduced as much as possible.

  Furthermore, it is possible to perform illumination and surveying from the outside through a transparent part without installing lighting equipment and surveying machines in the dust generation space 3, and these lightings and surveying machines are not contaminated with dust. Maintenance of facilities and surveying machines becomes easier.

Accordingly, the present invention is, of course may be efficiently removed before dust is diffused throughout the tunnel pits are Re Xiu practicality of the safety and workability compared to conventional can be improved dramatically of tunnel It becomes a cover for .

  A specific embodiment of the present invention will be described with reference to FIGS.

The present embodiment is a shield X installed so as to partition a dust generation space 3 including a dust generation location 2 in a tunnel well 1 formed by excavating a natural ground forward. X is composed of a dustproof sheet 4 and a frame 5 on which the dustproof sheet 4 is stretched, and at least a part of the dustproof sheet 4 is composed of a transparent material.

  Each part will be specifically described.

  The dustproof sheet 4 is entirely made of a transparent material. In this embodiment, a resin transparent film having a reinforcing cloth mesh inside is employed. The dustproof sheet 4 is fixed to the steel frame 5 by a wire 41.

  The frame 5 is composed of a column 11 configured by juxtaposing two column steel pipes 11a and 11b so as to be parallel to the surface direction of the dustproof sheet 4 by a connecting steel tube 15, and a frame supported by the column 11 It is composed of a material 12 and a crosspiece 13 that reinforces the frame material 12. In the figure, reference numeral 14 denotes a reinforcing member.

Shield X of this embodiment, the shield Xa, Xb are oppositely arranged on the upper right and left side of the tunnel pit 1 in FIG. 2 (upper right and upper left of the tunnel construction equipment), (Tunnel construction equipment) shield Xc arranged to the left, blocking the dustproof sheet 4 forming a part cutaway windows disposed on the right side (the tunnel construction system) was secured only upper edge to the notch windows provided In this configuration, a total of four bodies Xd are combined. Of the four shield, the left and right of the shield Xc, Xd is configured to be bent through the axial rod 33. That is, the left and right frame bodies 5 are connected so that the proximal end side and the distal end side are pivotally connected via a hinge (not shown) with the shaft rod 33 as a boundary, and the distal end side and the proximal end side are folded and overlapped. It is configured to be able to.

  The dustproof sheet 4 is not limited to a film or film, but may be a plate such as a tempered glass plate or a transparent acrylic plate, or a combination thereof. In this case, it becomes easier to see inside the dust generation space 3 as much as there is no mesh. Further, a transparent material such as a resin material may be employed as the frame body 5. In this case, the worker's field of view can be secured more.

  As shown in FIGS. 1 and 2, the dustproof sheet 4 and the frame 5 are detachably provided on a concrete spraying device 9 as a tunnel construction device. Specifically, as shown in FIGS. 3 and 4, the concrete spraying device 9 is provided between the driver's seat 10 of the concrete spraying device 9 and the dust generation location 2.

  Therefore, the operator who operates the concrete spraying device 9 does not need to be in the dust generation space 3, and the amount of dust sucked by the operator is reduced as much as possible.

  In addition, the concrete spraying device is not operated from the driver's seat as described above, but, for example, a concrete spraying device that is operated with a remote control in the dust generation space by taking protective measures such as the outside of the dustproof sheet or a mask during the concrete spraying work. May be.

  Further, the shield X is configured to be able to switch between a function exhibiting state that partitions the dust generation space 3 and a function non-execution state that does not partition the dust generation space 3, and is provided in the concrete spraying device 9. . That is, it is configured so that it can be switched between an open state in which the function is exhibited and a closed state in which the function is not exhibited and the concrete spraying device 9 is accommodated in the attached state.

The four shielding body columns 11 are fitted with fitting portions 20 or fitting projections 21 for the upper left side, upper right side, left side and right side provided in the concrete spraying device 9. Is provided.

  Specifically, as shown in FIG. 5 (the portion A in FIGS. 1 and 2), the lower left portion of the support column 11 (steel pipes 11a and 11b for the support column) is used for the upper left frame and the upper right frame body 5. The protrusions 16 and 17 are set to be fitted into the fitting recesses 20 of the spraying device 9, respectively.

  As the fitting recesses 20 for the upper left side and the upper right side of the concrete spraying device 9, cylindrical steel pipes into which the steel pipes 11a and 11b for supporting columns can be inserted are employed. Three cylindrical steel pipes are provided on each side, and the three cylindrical steel pipes 23, 24, and 25 are arranged in a substantially L shape.

  The three cylindrical steel pipes 23, 24, and 25 are disposed at substantially the same intervals as the support steel pipes 11a and 11b. In the figure, reference numeral 38 denotes a fixing frame for fixing the cylindrical steel pipe, and 39 denotes a fixing plate on which the cylindrical steel pipe is fixed in an upright state.

  The three cylindrical steel pipes 23, 24, and 25 are arranged so that the dustproof sheet 4 extends in the length direction of the concrete spraying device 9 when the steel pipes 11 a and 11 b for supporting columns are fitted to the cylindrical steel pipes 23 and 24. The dustproof sheet 4 is disposed so as to be substantially parallel to the length direction of the concrete spraying device 9 when fitted to the cylindrical steel pipes 23 and 25.

  Accordingly, the shield X can be firmly attached to the concrete spraying device 9, and the upper left and upper right support columns 11 of the shield X fitted to the cylindrical steel pipes 23, 24 are connected to the cylindrical steel pipe 23. -By pulling out from 24 and fitting into cylindrical steel pipes 23 and 25, it is possible to easily switch from a function exhibiting state that partitions the dust generation space 3 to a non-functioning state that does not partition the dust generation space 3 Become.

  Further, as shown in FIG. 6 (B portion in FIG. 1 and FIG. 2), the left and right frame bodies 5 are arranged at the center portion (substantially central position in the length direction) of the column 11 of the concrete spraying device 9. A steel fitting body 26 is provided in which fitting recesses 18 and 19 that are fitted to the left and right fitting projections 21 are formed.

  As the fitting convex portion 21, a rod-shaped steel pipe that can be inserted into the fitting concave portions 18 and 19 of the fitting body 26 is employed. Three each of these rod-shaped steel pipes are provided on one side, and the three rod-shaped steel pipes 27, 28, and 29 are arranged in a substantially L shape.

  The three rod-like steel pipes 27, 28, and 29 are disposed at substantially the same intervals as the intervals between the fitting recesses 18 and 19 provided in the left and right fitting bodies 26, respectively. In the figure, reference numeral 40 denotes a fixed body to which the rod-shaped steel pipe is fixed in an upright state.

  The three rod-like steel pipes 27, 28 and 29 are arranged so that the dustproof sheet 4 is the length of the concrete spraying device 9 when the fitting recesses 18 and 19 of the fitting body 26 are fitted to the rod-like steel pipes 27 and 28. The dustproof sheet 4 is arranged so as to be substantially parallel to the length direction of the concrete spraying device 9 when fitted to the rod-like steel pipes 27 and 29.

  Therefore, the shield X can be firmly attached to the concrete spraying device 9, and the fitting body 26 of the left and right shields X fitted to the rod-shaped steel pipes 27 and 28 is connected to the rod-shaped steel tubes 27 and 28. By extracting and fitting to the rod-shaped steel pipes 27 and 29, it is possible to easily switch from a function exhibiting state that partitions the dust generating space 3 to a function non- exhibiting state that does not partition the dust generating space 3.

  Further, the lengths of the rod-shaped steel pipes 27, 28, and 29 are set longer than those of the two rod-shaped steel pipes 28 and 29. Accordingly, only one of the rod-like steel pipes 28 and 29 is removed from the fitting recess 19 of the fitting body 26, and the fitting body 26 is rotated in the horizontal direction around the rod-shaped steel pipe 27 fitted in the fitting recess 18. Simply by fitting the fitting recess 19 to the other rod-shaped steel pipes 28 and 29, the shield X is easily switched from the functioning state of partitioning the dust generation space 3 to the non-functioning state of partitioning the dust generation space 3. be able to.

  In addition, in the present Example, although the above-mentioned structure is employ | adopted as a structure which switches a function display state and a function non-performance state, for example, the dustproof sheet 4 is pivotally attached with respect to a support | pillar in the state which can be rotated. Other configurations such as a configuration in which a hinge coupling, a ball coupling, a shaft rotation coupling that supports the column in a rotatable state, and the like are provided so as to be rotatable in the horizontal direction and the vertical direction may be employed.

  Further, the shield X is provided with a communication portion 8 that communicates with a dust removing device 6 that sucks dust-containing air containing dust generated at the dust generation location 2 and exhausts the dust-containing air 3 to the outside of the dust generation space 3. .

  Specifically, a part of the right dustproof sheet 4 is provided with a notch window formed in the film, and a dustproof sheet 4 having only its upper edge secured to the notch window is provided, and the dustproof sheet 4 secured only to this upper edge. The communication part 8 is formed by turning up. Accordingly, the dust can be removed by sucking the dust-containing air through the communication portion 8 with the dust removing device 6, for example.

Further, when the shield X is disposed in the tunnel mine 1, the shield X is disposed so as to have a predetermined gap 30 between the shield X and the inner peripheral wall of the tunnel mine 1. Therefore, when the dust-containing air in the dust generation space 3 is sucked by the dust removing device 6, the inside of the dust generation space 3 becomes negative pressure, and clean air from the outside of the dust generation space 3 passes through the gap 30. The dust-containing air can be prevented from leaking out of the dust generating space 3 through the gap 30 as much as possible.

In the figure, reference numeral 32 is a tunnel reinforcement wall formed on the concrete already blown to the inner peripheral wall 31 of the tunnel mine , 42 is a concrete supply device for supplying concrete to the concrete spraying device, and 34 is attached to the concrete spraying device 9 A nozzle 36 for spraying concrete is a vehicle on which the dust removing device 6 is loaded.

Incidentally, concrete spraying device 9, the dust removal device 6 and concrete supply apparatus 33 is a vehicle type none, easily movable in of tunnel 1, and if further drilling progress of tunnel 1, such as by blasting, tunnel When the concrete block 37 is arranged on the reinforcing wall 32 and the tunnel mine 1 is completed, it can be easily retreated to a position where it does not get in the way.

  Hereinafter, the work process will be further described in detail.

The dust generation location 2 is the concrete spraying work location 2, and the concrete spraying device 9 performs the operation of spraying a mixture (concrete spraying raw material) of cement small gravel, water or chemicals onto the inner peripheral wall 31 of the tunnel mine 1 with a large amount of air. A large amount of dust mixed with dust with a large particle size (small gravel) or mist-like dust is generated.

The concrete spraying device 9, the dust removing device 6 and the concrete supply device 33 are arranged at predetermined positions in the tunnel mine 1.

  Subsequently, each shielding body X attached to the concrete spraying device 9 is placed in a function exhibiting state so as to be orthogonal to the tunnel length direction to partition the dust generating space 3 including the concrete spraying work location 2.

In this embodiment for performing the concrete spray working position 2 in 35 closer working face of the tunnel pits 1, dust generation space 3 is defined by the inner circumferential wall 31 and the working face 35 of the tunnel pits 1 of tunnel 1 and shield X It becomes a Rukoto, so as to divide the dust generation space 3 between two of the inner peripheral wall 31 of the shield and of tunnel 1 of the present embodiment when performing the dusting tasks, etc. near the middle of the tunnel pits 1 Alternatively, the shield X may be partitioned by surrounding the dust generation space. Further, an excavator or the like for excavating the tunnel mine 1 is moved out of the concrete spraying work location 2.

Subsequently, the concrete spraying device 9 performs a concrete spraying operation on the inner peripheral wall 31 of the tunnel mine 1, and the dust removing device 6 sucks out the dust-containing air in the dust generating space 3 and performs the dust removing operation. At this time, the right shield X is provided with a communication portion 8 (duct portion) that communicates with the suction port 7 of the dust removing device 6 that discharges the dust-containing air in the dust generation space 3 to the outside of the dust generation space 3. Therefore, the dust-containing air in the dust generating space 3 passes through the duct portion and reaches the dust removing device 6, and the dust is removed by the dust removing device 6 to become clean air, which is outside the dust generating space 3. Is released.

The amount of dust-containing air sucked out by the dust removing device 6 is set to be larger than the total amount of the sprayed concrete amount and the air amount by the concrete spraying device 9. Accordingly, clean air is introduced into the dust generation space 3 from the gap 30 between the shield X of the present embodiment and the inner peripheral wall 31 of the tunnel mine 1. The dust-containing air is not leaked from the gap 30, and no pressure difference is generated between the dust generation space 3 and the outside of the dust generation space 3. Become.

Thereafter, the concrete spraying device 9, a dust removing device 6 and concrete supply device 33 moved from the vicinity of the working face 35 of the of tunnel 1, resume drilling moved drilling machine or the like in the vicinity of the working face 35 of the of tunnel 1 again.

  In addition, although the present Example demonstrated the case where the shielding body X of a present Example was attached to the concrete spraying apparatus 9 as mentioned above, it is needless to say that it may be provided in another apparatus or may be used alone. is there.

Since the present embodiment is configured as described above, the dust generated from the dust generation location 2 is prevented from diffusing out of the dust generation space 3 partitioned by the shield X. Therefore, by removing the dust-containing dust air with a high dust concentration in the dust generation space 3 by, for example, the dust removal device 6 that sucks and cleans the dust-containing air and exhausts it outside the dust generation space 3. It becomes possible to remove dust very efficiently before the dust diffuses throughout the tunnel mine 3.

  Further, the dust generation space 3 can be partitioned very simply by simply arranging the shield X so as to be orthogonal to the tunnel length direction.

  In addition, since the dustproof sheet 4 is transparent, it is possible to check the condition of concrete spraying work and ground conditions through the dustproof sheet 4 without the worker entering the dust generation space 3, so that the worker The amount of dust suction can be reduced as much as possible.

  Accordingly, the dustproof sheet 4 is not likely to obstruct the operator's field of view, and it is not necessary to remove the dustproof sheet 4 during movement or the like, nor to fold it small. And it will be extremely workable.

  Furthermore, it is possible to perform illumination and surveying from outside the dust generation space 3 through the dustproof sheet 4 without installing a lighting facility or surveying machine in the dust generation space 3, and the lighting facility or surveying machine can be contaminated with dust. In addition, the maintenance of these lighting facilities and surveying machines becomes easier.

Therefore, this example is excellent in practicality that can dramatically improve safety and workability as compared with the prior art, as well as being able to efficiently remove dust before it diffuses throughout the tunnel mine . It becomes a shield.

It is a schematic explanatory perspective view of a present Example. It is the schematic explanatory front view seen from the dust generation location side of a present Example. It is a schematic explanatory side view of a present Example. It is a schematic explanatory side view of a present Example. FIG. 3 is an enlarged schematic explanatory perspective view of a portion A in FIGS. 1 and 2. FIG. 3 is an enlarged schematic explanatory perspective view of a portion B in FIGS. 1 and 2.

DESCRIPTION OF SYMBOLS 1 Tunnel well 2 Dust generation location 3 Dust generation space 4 Dust-proof sheet 5 Frame body 6 Dust removal apparatus 8 Communication part 9 Concrete spraying apparatus
11 struts
12 frame material
13 piers
16, 17 mating protrusion
18, 19, 20 mating recess
21 Mating protrusion
26 Fitting body X Shielding body

Claims (7)

The A shield for a tunnel pit for partitioning the dust generating space including a dust occurrence location in the tunnel pits formed by drilling progresses forwardly natural ground, the shield supporting the dustproof sheet and the dust-proof sheet is composed of a frame body, the dust-proof sheet is formed of a transparency material, also, the shield detachably provided between said dusting portion and the driver's seat of the tunnel construction equipment, Furthermore, this shielding The body is divided and arranged on the upper right side, upper left side, right side and left side of the tunnel construction apparatus, and the upper right side shielding body and the upper left side shielding body are arranged so as to be orthogonal to the tunnel length direction. It is configured to be switchable from a function exhibiting state that partitions the dust generation space to a non-functioning state that is superposed on each other and does not partition the dust generation space, and the right shield and the left shield are in the tunnel length direction. When From the functioning state disposed intersect each partitioning the dust generating space, said is configured to be switchable to a functional non exert state is additionally provided on the side surface without partitioning the dust generating space of the tunnel construction apparatus A shield for a tunnel tunnel . The shield for a tunnel mine according to claim 1, further comprising a communication portion that communicates with a dust removing device that sucks dust-containing air containing dust generated at the dust generation location and exhausts the dust-containing air to the outside of the dust generation space. A shield for a tunnel mine characterized by In shield for a tunnel pit according to any one of claims 1, wherein the dust-proof sheet, shield for a tunnel pit, characterized in that all is made of a transparent material. In shield for a tunnel pit according to any one of claims 1 to 3, wherein the tunnel construction device, shielding of the tunnel pits, which is a concrete spray device. The shield for a tunnel mine according to any one of claims 1 to 4 , wherein the frame body includes a support column, a frame member supported by the support column, and a crosspiece that reinforces the frame member. shield for a tunnel pit, characterized in that there. In shield for a tunnel pit according to claim 5 Symbol mounting, the frame of the upper right-hand shield and the upper left side of the shield, respectively fitting together tighten the lower end of the strut into the mating recess of the tunnel construction apparatus It is set to the fitting convex part to be formed, The shield for tunnel wells characterized by the above-mentioned. The shield for a tunnel mine according to any one of claims 5 and 6 , wherein the left shield and the frame of the right shield are provided for the left side of the tunnel construction device at the center of the support column. A shield for a tunnel mine , characterized in that a fitting body in which a fitting recess is formed to be fitted to each of the right fitting protrusions is provided .

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