JP7287724B1 - containment booth - Google Patents

Abstract

A containment booth is provided that prevents dust generated around a tunnel construction machine from diffusing into a tunnel pit when the machine is in operation. A containment booth (1) is installed in a tunnel pit (100) during tunnel construction, accommodates a tunnel construction machine (20) used in the tunnel construction, and confines dust generated by the operation of the tunnel construction machine (20). , The containment booth 1 is formed by enclosing a part of the space on the face side FS of the tunnel pit 100 with a partition sheet 7 . [Selection drawing] Fig. 1

Description

The present invention relates to a containment booth that houses tunneling machinery and is located in a tunnel shaft during tunneling.

When a tunnel construction machine is operated, dust is generated around the machine.

For example, in mountain tunnel construction, the mud was conventionally transported using dump trucks, but in recent years, conveyors with crushers (including long conveyors with crushers and non-long conveyors with crushers. Below) , abbreviated as "conveyor with crusher"). By not using a dump truck, (1) there is no loss, fuel, and maintenance costs for a dump truck, (2) there is no need for a dump driver, so labor costs are reduced, and (3) the dump truck runs inside the mine. (4) No dust is stirred up on the ground when the dump truck is running; (5) No harmful gas is generated when the dump truck is running, and carbon dioxide emissions are also reduced. There are various advantages such as being able to

However, the use of the crusher-equipped conveyor is not only advantageous. For example, in the scraping process using a conveyor with a crusher, a large block of rock after blasting is crushed by a crusher, and then the crushed material (shredder that has become smaller due to crushing) is transported to the pit mouth side by a conveyor. When the rock mass is crushed by a crusher, a large amount of dust is generated, which pollutes the environment inside the tunnel and poses a risk to the health of field workers.

Moreover, this is not the only place where dust is generated on a conveyor with a crusher. In other words, dust is generated not only in the upper part of the crusher (upper part of the crushing part), but also in (1) the part where coarse rocks are introduced (shear receiving port, hopper, grizzly feeder, etc.), and (2) the discharge of crushed debris. Part (e.g. discharge port), (3) primary conveyor discharge port, (4) extension transfer portion, (5) long conveyor transfer portion, etc. generate dust. In this way, dust is generated at various locations on the conveyor with the crusher, and the area where the dust is generated is, for example, about 4m in the width direction of the tunnel and about 30m in the longitudinal direction of the tunnel (extending direction of the tunnel). There is also

In addition to the generation of dust, the following problems also occur.

For example, the position of the tunnel face changes with each blasting, so the distance between the face and the conveyor with the crusher gradually increases. A shovel loader is used to transport debris (large rock masses, etc.) near the face to a conveyor with a crusher. , the productivity decreases. In order to prevent such inconvenience, the conveyor with the crusher is moved to the face side at least twice a month at the site.

When moving the conveyor with the crusher to the face side, it is preferable to shorten the distance between the face and the conveyor with the crusher, preferably within about 50 m. When the distance between the face and the conveyor with the crusher is shortened, the traveling distance of the shovel loader that reciprocates between the face and the conveyor with the crusher is shortened, and the muck transportation efficiency is improved. There is also the advantage that consumption of gasoline fuel by the shovel loader, tire wear, and the like are reduced, and the amount of exhaust gas emitted from the shovel loader is also reduced. As described above, it is preferable to place the conveyor with crusher within 50 m from the face, but in order to prevent the crusher from breaking down due to the stepping stones generated during blasting, the conveyor with crusher is actually installed. There is a problem that it must be installed at a position away from the face to the pit mouth side by 50 m or more.

In addition, if the conveyor with the crusher is provided near the face, there is also a problem that dust generated from the crusher may contaminate the air near the face when it flows toward the face.

In addition, the push-pull method is often used for ventilation near the face during tunnel construction. In this method, an air supply duct is installed near the ceiling near the face, and a suction duct is installed on the road surface at a distance of about 100m from the face to the tunnel mouth side. This is a ventilation system that purifies the air near the face by sucking air from the tunnel through a suction duct to move contaminated air generated near the face to the portal side. In this push-pull system, the air at the position where the suction duct is installed (a position about 100m away from the face) is actually easy to clean, but since the distance from the face to the suction duct is long, The problem is that air is relatively difficult to clean. Since workers often work near the face, there is a high need to clean the air near the face, and it is desirable to install the suction duct and the dust collector connected to the suction duct as close to the face as possible. However, if the suction duct and dust collector are installed near the face, there is a high possibility that the suction duct and dust collector will break down due to collision with flying stones generated during blasting, and as a result, the suction duct and dust collector will have to be kept away from the face. There is no problem.

In addition, laser survey instruments and automatic drilling systems such as drifters are often placed at a distance of about 100m from the face to the pithead side. When arranging a conveyor with a crusher between them, there is a problem that mutual interference must be avoided.

Incidentally, there are inventions disclosed in the following Patent Documents 1 and 2 as prior art related to the present invention.

The tunnel ventilation method and tunnel ventilation system described in Patent Document 1 define a first position, a second position, and a third position in order from the face side of the tunnel toward the entrance side to form a plurality of air curtains. It is an invention to And according to this invention, it is shown that the shielding property of the air mixed with dust is excellent, and the ventilation property in the tunnel is excellent.

In the face containment method described in Patent Document 2, a partition is formed in a predetermined range from the ceiling wall surface and the inner wall side surface of the tunnel, one end of an exhaust pipe is provided on the face side of the partition wall, and the exhaust pipe connects the partition wall and the face. It is disclosed that dust collection of contaminated air in the intervening space allows the air to flow from the wellhead side to the face side, thereby preventing diffusion of the contaminated air. According to this invention, it is shown that the polluted air generated near the face during tunnel construction can be prevented from diffusing throughout the tunnel, and the polluted air can be discharged.

JP 2016-33325 A JP 2012-202093 A

However, the air curtain disclosed in Japanese Patent Laid-Open No. 2002-200303 has a problem that it does not sufficiently shield air containing dust. In addition, it is important to balance the amount of blown air and the amount of collected dust for the formation of the air curtain. In particular, there is a problem that it is difficult to form an air curtain as designed at an actual construction site because the amount of air blown changes depending on the season and temperature.

In addition, the face containment method disclosed in Patent Document 2 can block contaminated air by balloons placed on the top and both sides of the cross section of the tunnel, respectively, but a large opening is provided in the center of the cross section. Therefore, the blockage of contaminated air is not sufficient. Moreover, since the balloon is provided only at one place in the front-rear direction of the tunnel, it is difficult to deal with dust generated everywhere in a device that extends long in the front-rear direction like a conveyor with a crusher.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a containment booth that prevents the dust generated around a machine for tunnel construction from diffusing into the tunnel pit when the machine is in operation. That's what it is.

The present invention, which has solved the above problems, is as follows.

(First aspect)
A containment booth that is installed in a tunnel pit during tunnel construction, accommodates tunnel construction machines used for tunnel construction inside, and confines dust generated by the operation of the tunnel construction machines inside,
The containment booth includes:
A containment booth characterized in that it is formed by enclosing a part of the space on the face side of a tunnel shaft with a partition sheet.

(Effect)
By installing a containment booth in a part of the space on the face side of the tunnel pit and housing tunnel construction machines in the containment booth, when dust is generated by the operation of the tunnel construction machines, the dust is contained in the booth. can be contained within. As a result, it is possible to prevent the inside of the tunnel outside the containment booth from being contaminated by the dust generated by the operation of the tunneling machinery.

(Second aspect)
In the partition sheet,
The first aspect, wherein a dust collector is connected to suck the contaminated air inside the containment booth, discharge the purified air from which dust has been removed to the outside of the containment booth, and create a negative pressure inside the containment booth. containment booth.

(Effect)
As in the second aspect, a vacuum can be created inside the containment booth by the dust collector to create a flow of air from the outside to the inside of the containment booth. As a result, even if there is a slight gap in the containment booth, it is possible to prevent contaminated air inside the containment booth from leaking out of the containment booth through the gap.

(Third aspect)
The containment booth of the first aspect, wherein the ends of the divider sheet are provided with balloons extending along the ends thereof.

(Effect)
Gaps can occur at the edges of the divider sheet through which contaminated air inside the containment booth can escape to the outside of the containment booth. By providing a balloon extending along the edge of the partition sheet and filling the gap generated at the edge of the partition sheet with the balloon, the contaminated air inside the containment booth leaks to the outside of the containment booth. can reduce the likelihood of

(Fourth aspect)
A tunnel wall surface is used on a part of the surface forming the containment booth,
The containment booth of the first aspect, wherein the ends of the partition sheet are connected with the tunnel wall.

(Effect)
By using tunnel walls as part of the containment booth, the number of parts in the containment booth can be reduced. As a result, it is easier to set up a containment booth. In addition, by making part of the walls of the containment booth tunnel walls, it is possible to increase the strength of the containment booth compared to the case where all the walls of the containment booth are made of partition sheets. As a result, even if strong winds occur in a tunnel, for example, such strong winds are less likely to deform the shape of the containment booth.

(Fifth aspect)
The partition sheet is
a front partition sheet provided on the face side of the tunnel pit and extending from a wall portion on one side in the width direction of the tunnel toward the other side in the width direction of the tunnel;
a rear partition sheet provided at the entrance side of the tunnel pit and extending from a wall portion on one side in the width direction of the tunnel toward the other side in the width direction of the tunnel;
a side partition sheet extending in the front-rear direction of the tunnel and connecting between the other width direction side portion of the front partition sheet and the other width direction side portion of the rear partition sheet;
The containment booth of the first aspect, comprising:

(Effect)
It is possible to obtain the same effects as those of the fourth aspect.

(Sixth aspect)
An opening for carrying waste into the containment booth is provided in a part of the side partition sheet,
The containment booth of the fifth aspect, wherein the opening is provided with a shatterproof sheet having a notch at the bottom.

(Effect)
By providing an opening in a part of the side partition sheet, it becomes easier to carry the waste into the containment booth. In addition, by providing a scattering prevention sheet in the opening, it is possible to prevent dust generated inside the containment booth from leaking out of the containment booth through the opening. By providing a notch in the lower part of the anti-scattering sheet, the anti-scattering sheet can be easily opened to the left and right like a noren, so there is an advantage that it is easy to carry in the dust.

(Seventh aspect)
A rail extending in the front-rear direction of the tunnel is provided on the upper wall of the tunnel,
The upper part of the side partition sheet is connected to the rail,
The containment booth according to the fifth aspect, wherein the side partition sheet can be opened and closed in the longitudinal direction of the tunnel along the rail.

(Effect)
The side partition sheet can be opened and closed in the front and back direction of the tunnel, making it easier for tunnel construction machines to enter and exit the containment booth.

(Eighth aspect)
Multiple shorings are installed at predetermined intervals in the front and back direction of the tunnel,
The containment booth of the seventh aspect, wherein said rails are connected to said shoring via magnets.

(Effect)
By using the shoring provided in the tunnel and attaching and detaching the rail to the shoring via a magnet, the installation and movement of the rail are facilitated.

(Ninth aspect)
A weight is provided at the lower end of the side partition sheet,
8. The containment booth of claim 7, wherein the weight causes the bottom edge of the side partition sheet to be in intimate contact with the tunnel road surface.

(Effect)
By providing a weight at the lower end of the side partition sheet, the lower end of the side partition sheet can be brought into close contact with the road surface of the tunnel, making it difficult for dust to leak from the inside of the containment booth to the outside.

Advantageous Effects of Invention According to the present invention, it is possible to provide a containment booth that prevents dust generated around a machine for tunnel construction from diffusing into the tunnel pit when the machine is in operation.

1 is a schematic side view of an embodiment of a containment booth in accordance with the present invention; FIG. Figure 2 is a schematic side view of the containment booth of Figure 1 from the opposite side; Figure 3 is a plan view of the containment booth shown in Figures 1 and 2; FIG. 2 is a view taken along the line AA in FIG. 1; FIG. 2 is a view taken along line BB of FIG. 1; It is a schematic side view showing an example of a scattering prevention sheet.

A preferred embodiment of the containment booth 1 according to the present invention will now be described with reference to the drawings. The following description and drawings merely show an example of the embodiment of the present invention, and the content of the present invention should not be construed as being limited to this embodiment.

Note that the longitudinal direction FBD of the tunnel refers to the traveling direction of the tunnel, the face side FS is also referred to as the front side, and the wellhead side BS is also referred to as the rear side. Further, the width direction WD of the tunnel is also referred to as the tunnel lateral direction, and the left and right in the width direction of the tunnel refer to the left and right when the face side is viewed from the entrance side.

(Containment booth 1)
As shown in FIGS. 1 to 3, a containment booth 1 is provided in a tunnel shaft, and a crusher installation 20 is confined inside the containment booth 1 . The crusher equipment 20 includes the crusher 2 provided with the muck introduction section 4 and the tailpiece carriage 3 connected to the rear of the crusher 2 .

The object to be confined in the containment booth 1 is not limited to the crusher equipment 20, and other machines used in tunnel construction such as a jumbo, a backhoe, and a breaker may be confined.

As shown in FIGS. 3 to 5, the containment booth 1 is preferably provided close to one side (the left side LS in the illustrated embodiment) in the width direction WD inside the tunnel. It is preferable that the containment booth 1 is not provided on the other side of the tunnel in the width direction WD, and that the space without the containment booth 1 is used as a passage through which other tunnel construction machines can pass. Thus, by using the other side of the containment booth 1 as a passageway, it is possible to improve the workability of the tunnel construction. In particular, by allowing the shovel loader to enter this passageway, the waste carried by the shovel loader from the face can be carried into the containment booth 1 through an opening OS provided in the side partition sheet 7S, which will be described later. easier to do.

As described above, by providing the containment booth 1 , the dust generated from the crusher equipment 20 and the like in the containment booth 1 can be confined within the containment booth 1 . As a result, the dust concentration outside the containment booth 1 in the tunnel can be reduced. According to the Ministry of Health, Labor and Welfare's "Guidelines for Dust Countermeasures in Construction Work such as Tunnels" revised in 2020, the target level of dust concentration was changed from 3 mg/ ^m3 or less to 2 mg/m3 ^or less. By confining the crusher equipment 20 and the like, which generate a large amount of dust, in the containment booth 1, it is possible to promote achievement of the dust concentration target level of the guideline.

(Partition sheet 7)
The containment booth 1 is formed by partition sheets 7 that partition a portion of the tunnel interior 100 into predetermined compartments. In the embodiment of FIGS. 1 to 3, the partition sheet 7 is provided on the face side FS of the tunnel pit 100, and extends from the tunnel wall portion on the left side LS in the width direction WD of the tunnel to the right side RS in the width direction WD of the tunnel. and a front partition sheet 7F extending toward the front partition sheet 7F, which is provided on the portal side BS of the tunnel pit 100 and extends from the tunnel wall portion on the left side LS in the width direction WD of the tunnel toward the right side RS in the width direction WD of the tunnel. Between the rear partition sheet 7B, the widthwise right side portion of the front partition sheet 7F (widthwise center side portion in this embodiment) and the widthwise right side portion of the rear partition sheet 7B (widthwise center side portion in this embodiment). and a side partition sheet 7S extending in the longitudinal direction FBD of the tunnel. The right end portions of the front partition sheet 7F and the side partition sheet 7S are fixed to the wall surface 30 of the tunnel by a fixture 13 such as a spatula.

If the containment booth is brought close to the face, it is expected that flying stones from the face will collide with the front partition sheet 7F during blasting, so it is preferable to use a high-strength material for the front partition sheet 7F. For example, the front partition sheet 7F preferably has fibers selected from the group of polyarylate high tenacity fibers, aramid fibers, polyesters and tarpaulins. Alternatively, a reinforcing sheet containing fibers selected from the group consisting of polyarylate high-strength fibers, aramid fibers, polyesters and tarpaulins may be attached to the face side FS surface of the front partition sheet 7F. Such a high-strength front partition sheet 7F preferably has a tensile strength of 3030 N/3 cm or more.

Note that the distance FBL in the front-rear direction FBD between the front partition sheet 7F and the rear partition sheet 7B (hereinafter referred to as the "partition-to-partition distance") can be appropriately changed depending on the type of work machine to be confined. 15 to 30 m when the crusher equipment 20 is confined as shown in FIG. In other words, it is necessary to make the distance FBL between the partitions longer than the distance in the longitudinal direction FBD of the work machine confined in the containment booth 1, but it is also not preferable to make the distance FBL between the partitions too long. This is because, although it is preferable to create a negative pressure inside the containment booth 1 as will be described later, the containment booth 1 becomes larger as the inter-partition distance FBL increases. Therefore, when trying to create a negative pressure inside the containment booth 1, a large dust collector 5 is required to create a negative pressure, and the electric power required to operate the dust collector 5 increases, resulting in initial costs and running costs. There is a problem that the cost becomes high.

(balloon 8)
It is preferable to provide balloons 8 extending along the edges of the partition sheet 7 . Where the balloon 8 is provided on the partition sheet 7 is not particularly limited. It is preferable to prevent the dust from escaping.

As shown in FIGS. 4 and 5, it is preferable to provide a balloon 8 around the front partition sheet 7F and the rear partition sheet 8B to seal the front partition sheet 7F and the rear partition sheet 8B. More specifically, it extends along the left edge of the front partition sheet 7F so as to fill the gap between the wall surface of the tunnel (surface of the peripheral wall 30) and the wall-side peripheral edge of the front partition sheet 7F facing the peripheral wall 30. It is preferred to provide a wall balloon 8w which is present (curved in FIG. 4). Further, it extends along the lower edge of the front partition sheet 7F so as to fill the gap between the tunnel road surface 15 and the lower edge of the front partition sheet 7F (in FIG. 4, it extends in the width direction WD). Preferably, a lower balloon 8u is provided. By providing the wall-side balloon 8w and the lower-side balloon 8u in this way, the dust inside the containment booth 1 is prevented from leaking out of the containment booth 1 through the gaps opened on the wall side and under the front partition sheet 7F. can be prevented.

In addition, it is preferable to provide a central balloon 8c on the right edge of the tunnel of the front partition sheet 7F (the central edge of the tunnel in FIG. 4). By providing the central balloon 8c, the gap between the front partition sheet 7F and the side partition sheet 7S can be filled, so that dust inside the containment booth 1 can be prevented from leaking out of the containment booth 1 through the gap. can be prevented.

Further, it is more preferable to provide a bridging balloon 8x extending in the width direction WD so as to bridging between the tunnel center balloon 8c and the wall balloon 8w. By providing the bridging balloon 8x, the shape of the entire balloon 8 can be easily balanced, and the entire balloon 8 is less likely to be distorted when, for example, a strong wind hits the front partition sheet 7F during blasting.

The wall-side balloon 8w, the central-side balloon 8c, the lower-side balloon 8u, and the bridging balloon 8x described above are preferably integrated by connecting adjacent portions thereof. By connecting and integrating the balloons 8w, 8c, 8u, and 8x in this way, it is not necessary to inject air separately for each of the balloons 8w, 8c, 8u, and 8x. It can increase the efficiency when inflating with air. That is, when the balloons 8w, 8c, 8u, and 8x are not connected, for example, after inflating the wall-side balloon 8w by connecting an air pump to the wall-side balloon 8w, the air pump is removed and air is supplied to the center-side balloon 8c. It is necessary to inflate the central balloon 8c by connecting the containers, and then inflate the lower balloon 8u and the bridging balloon 8x in sequence, which takes time and labor. Therefore, by connecting and integrating the balloons 8w, 8c, 8u, and 8x, for example, when an inflator is connected to the wall-side balloon 8w and air is started to be introduced into the wall-side balloon 8w, the wall-side balloon 8w enters. Since the air also flows to other adjacent balloons 8c, 8u, 8x, there is no need to repeatedly attach and detach the inflator, and the time and effort required for inflating can be reduced. In particular, by connecting the vertical intermediate portion of the wall-side balloon 8w and the vertical intermediate portion of the center-side balloon 8c with the bridging balloon 8x, when the entire balloon 8 is inflated with air, the air There is an advantage that it is easy to enter and easy to inflate.

A known material can be used for the balloon 8 as described above. For example, a polyester fiber cloth or a chemical fiber (for example, polyester fiber) cloth coated on one or both sides with a synthetic resin (for example, vinyl chloride resin) can be used. A sheet (commonly known as tarpaulin) can be used.

Although the balloons 8 provided around the front partition sheet 7F have been described above, the balloons 8w, 8u, and 8c can also be provided on the rear partition sheet 7B in the same manner as the front partition sheet 7F.

(Dust collector 5)
As shown in FIGS. 1 to 3, a dust collector 5 is provided behind the dust collection booth 1. A suction fan built into the dust collector 5 sucks the air inside the containment booth 1, It is preferable to purify the air in the containment booth 1 and maintain a negative pressure inside the containment booth 1 . By keeping the inside of the containment booth 1 at a negative pressure, it is possible to prevent the dust from leaking out of the containment booth 1 when dust is generated inside the containment booth 1 due to the operation of working machines or the like. For example, in FIG. 1, when a shovel loader (not shown) that carries waste near the face throws the waste into the waste feeding unit 4, or when the waste falls from the rear end of the crusher 2 to the tailpiece carriage 3, It is assumed that a large amount of dust will be generated in the containment booth 1, but even in that case, by keeping the inside of the containment booth 1 at a negative pressure, the generated dust will not leak out of the containment booth 1. can be prevented.

An introduction pipe 5B attached to the tip side of the dust collector 5 is connected to a later-described rear partition sheet 7B. The rear partition sheet 7B is provided with an opening OBp (also referred to as an "introduction-tube rear opening OBp") having approximately the same diameter as the introduction tube 5B. It is inserted inside OBp. By making the diameters of the introduction pipe 5B and the opening OBp approximately the same, dust can be prevented from leaking out of the containment booth 1 through the opening OBp.

The type of the dust collector 5 is not particularly limited, and any commercially available one can be used. The dust collector 5 of FIG. 1 has a filter section 5A in which a plurality of cartridge filters are arranged in parallel, a suction fan 5C and an exhaust port 5D arranged behind the filter section 5A.

(Side partition sheet 7S)
As previously mentioned, the containment booth 1 according to the embodiment shown in FIGS. 1-5 has a tunnel peripheral wall 30 on one side (left LS in the illustrated embodiment) and an upper HIS, and on the other side (right LS in the illustrated embodiment). is provided with a side partition sheet 7S.

It is preferable to provide an opening OS (also referred to as a "side opening OS") in the side partition sheet 7S. In the embodiment shown in FIGS. 1 to 5, the shovel loader is configured to introduce the waste into the waste introduction section 4 from the lateral direction WD through the opening OS. In order to prevent the dust generated inside the containment booth 1 from leaking out of the containment booth 1 through the opening OS, the air inside the containment booth 1 is sucked by the dust collector 5 as described above, and the dust is removed from the tunnel pit. A wind WND is preferably generated that flows from 100 into the containment booth 1 . Although the speed of the wind WND depends on the suction force of the dust collector 5, it is preferable to set the speed of the wind WND passing through the opening OS to about 0.3 to 0.5 m/s, for example. If the speed of the wind WND is slower than 0.3 m/s, there is a risk that the dust generated inside the containment booth 1 will leak out of the containment booth 1 . Also, if the speed of the wind WND is faster than 0.5 m/s, the lower part of the side partition sheet 7S will flow toward the containment booth 1 and tilt, or flutter when the wind speed changes. There is a risk.

Also, in order to prevent dust generated in the containment booth 1 from leaking out of the containment booth 1, it is preferable to seal the opening OS as much as possible. Therefore, it is preferable to provide a scattering prevention sheet 11 (hereinafter referred to as "lateral scattering prevention sheet 11s") for preventing scattering of dust in the opening OS. As the side scattering prevention sheet 11s, for example, a sheet having a shape like a noren having a notch 10 at the bottom as shown in FIG. 6 can be used. Although the material of the side scattering prevention sheet 11s is not particularly limited, it is preferable to use a material having predetermined strength and durability because a shovel of a shovel loader or the like passes through the side scattering prevention sheet 11s. It is preferable to use a cloth made of fibers such as polyester. Moreover, it is preferable that the side scattering prevention sheet 11s is provided so as to cover the entire opening OS. Specifically, it is preferable to provide the side scattering prevention sheet 11s having approximately the same size as the opening OS, or to provide the side scattering prevention sheet 11s that is slightly larger or slightly smaller than the opening OS.

It is preferable that the side partition sheet 7S can be opened and closed like a curtain. Specifically, a rail 6 is installed along the front-rear direction FBD of the tunnel on or near the tunnel wall surface 30 (upper wall surface), and the side partition sheet 7S is placed along the rail 6 like a curtain in the tunnel front-rear direction FBD. It is preferable to be able to open and close at any time. The side partition sheet 7S may be opened on both sides or may be opened on one side.

By opening and closing the side partition sheet 7S, there is an advantage that the relocation, inspection and repair of the crusher equipment 20 installed in the containment booth 1 are facilitated.

As the tunnel construction progresses, it becomes necessary to move the rail 6 to the face side. In order to facilitate this relocation, it is preferable to attach a magnet to the upper portion of the rail 6 and connect the rail 6 and the tunnel support via this magnet. A magnet may be attached directly to the upper part of this rail 6, or may be attached indirectly via another member.

(weight 12)
A weight 12 is provided at the lower end of the side partition sheet 7S, and the gravity of this weight 12 brings the lower end of the side partition sheet 7S into contact with the roadbed of the tunnel, so that the dust in the containment booth 1 is kept below the containment booth 1. It is preferable not to leak from the The type of the weight 12 is not particularly limited, and any weight such as a sandbag can be used as long as the side partition sheet 7S can be sunk downward. Since the side partition sheet 7S extends in the tunnel front-rear direction FBD, weights 12 used as, for example, fishing tackles are attached to the lower ends of the side partition sheets 7S at predetermined intervals in the tunnel front-rear direction FBD. It is preferable to use a chain or the like arranged so as to extend in the tunnel front-rear direction FBD at the lower end of the side partition sheet 7S rather than providing it.

(Side balloon 8S)
If there is a gap between the side partition sheet 7S and the upper wall of the tunnel, the dust generated inside the containment booth 1 cannot be contained, and the dust may leak out of the containment booth 1 from inside the containment booth 1. . In order to prevent such leakage, a side balloon 8S extending in the tunnel front-rear direction FBD is provided between the side partition sheet 7S and the tunnel 30 (upper wall surface). It is preferable to close the perimeter of the containment booth 1 by filling the gap between the partition sheet 7S and the upper wall of the tunnel. Since rails 6 are laid above the side partition sheet 7S, one side balloon 8S is placed on one side of the side partition sheet 7S (inside the containment booth 1) with the rail 6 interposed therebetween. In addition to providing one on the other side (outside the containment booth 1), it is preferable because the enclosure of the containment booth 1 becomes more reliable.

(conveyor 14)
A conveyor 14 (for example, a belt conveyor) is provided near the rear end of the tailpiece carriage 3 and extends along the longitudinal direction FBS of the tunnel pit 100 . Specifically, the leading end of the conveyor 14 is arranged below the rear end of the tailpiece carriage 3, and the rear end of the conveyor 14 is placed at an arbitrary location outside the tunnel (it may be at an arbitrary location on the entrance side of the tunnel). are placed in In addition, the conveyor 14 passes through an opening OBc (also referred to as a "conveyor rear opening OBc") provided in the rear partition sheet 7B on the rear side BS of the tailpiece carriage 3, and passes through the containment booth 1. It is arranged to extend from the inside to the outside of the containment booth 1. In order to prevent the dust inside the containment booth 1 from leaking out of the containment booth 1 through the opening OBc, it is preferable to provide a scattering prevention sheet 11 (hereinafter referred to as "rear scattering prevention sheet 11b"). The shape, material, and size of the rear scattering prevention sheet 11b are preferably the same as those of the side scattering prevention sheet 11s.

(effect)
According to the containment booth 1 of the above-described embodiment, the crusher equipment 20 is arranged in the containment booth 1, and the inside of the containment booth 1 is hermetically sealed. As a result, air contamination in the vicinity of the tunnel face is extremely reduced, and a favorable working environment can be created.

Further, by adopting a movable curtain system for the side partition sheet 7S, relocation, inspection and repair of the crusher equipment 20 are facilitated.

In addition, the containment booth 1 can be relocated manually and can be set up in a short time.

Furthermore, by providing the containment booth 1, the crusher equipment 20 can be protected from flying stones generated during blasting.

(others)
1 to 5, the partition sheet 7 is not provided on the left LS side surface and the top surface of the containment booth 1, and instead of the partition sheet 7, the wall surface 30 of the tunnel is used. It is not limited to such a form. For example, in the embodiments of FIGS. 1 to 5, the partition sheet 7 may be provided on either the left LS side surface or the top surface of the containment booth 1 . Further, for example, all surfaces of the containment booth 1 may be configured with partition sheets 7 . In such a case, in order to stabilize the partition sheet 7, it is preferable to provide support members such as poles inside like a tent.

Further, in the embodiment of FIGS. 1 to 5, the shape of the containment booth 1 is square in plan view, but it is not necessarily limited to such a shape. For example, the containment booth 1 may have a circular shape in plan view, or may have a polygonal shape such as a triangle or a hexagon.

DESCRIPTION OF SYMBOLS 1... containment booth, 2... crusher, 3... tailpiece carriage, 4... shear input part, 5... dust collector, 5A... filter part, 5B... introduction pipe, 5C... suction fan, 5D... exhaust port, 6... rail, 7 Partition sheet 7F Front partition sheet 7B Rear partition sheet 7S Side partition sheet 8 Balloon 8F Front balloon 8B Rear balloon 9 Blocking section 9F Front blocking section 9B Rear blocking part 10... Notch 11... Anti-scattering sheet 12... Weight 13... Fixing tool 14... Conveyor 15... Tunnel road surface 16... Air supply port 20... Crusher equipment 30... Tunnel peripheral wall 100 ...inside the tunnel, FBD...front and back direction, FS...front side, BS...rear side, WD...width direction, LS...left side, RS...right side, HD...height direction, HIS...upper side, LOS...lower side, LW...left wall surface , RW... right wall surface, WND... wind, OS... side opening, OB... rear opening, OBc... rear opening for conveyor, OBp... rear opening for introduction pipe, CA... purified air

Claims (6)

A containment booth that is installed in a tunnel pit during tunnel construction, accommodates tunnel construction machines used for tunnel construction inside, and confines dust generated by the operation of the tunnel construction machines inside,
The containment booth includes:
It is formed by enclosing a part of the space on the face side inside the tunnel with a partition sheet,
The partition sheet is
a front partition sheet provided on the face side of the tunnel pit and extending from a wall portion on one side in the width direction of the tunnel toward the other side in the width direction of the tunnel;
a rear partition sheet provided at the entrance side of the tunnel pit and extending from a wall portion on one side in the width direction of the tunnel toward the other side in the width direction of the tunnel;
a side partition sheet extending in the front-rear direction of the tunnel connecting the other width direction side portion of the front partition sheet and the other width direction side portion of the rear partition sheet;
A rail extending in the front-rear direction of the tunnel is provided on the upper wall of the tunnel,
The upper part of the side partition sheet is connected to the rail,
Multiple shorings are installed at predetermined intervals in the front and back direction of the tunnel,
A containment booth, wherein said rails are connected to said shoring via magnets . The front partition sheet, the rear partition sheet, and the side partition sheet extend from the upper part to the lower part of the tunnel,
In the rear partition sheet,
A dust collector is connected to suction the contaminated air inside the containment booth, discharge the purified air from which dust has been removed to the outside of the containment booth, and create a negative pressure inside the containment booth,
2. The containment booth of claim 1 , wherein said dust collector is located longitudinally rearward of said rear partition sheet . The containment booth includes:
a wall-side balloon extending along the wall-side peripheral edge of the front partition sheet and filling a gap between the peripheral wall of the tunnel and the wall-side peripheral edge of the front partition sheet facing the peripheral wall;
At least one of a lower balloon extending along the lower edge of the front partition sheet and filling a gap between the tunnel road surface and the lower edge of the front partition sheet. ,
The front partition sheet has a fiber selected from the group consisting of polyarylate-based high-strength fiber, aramid fiber, polyester and tarpaulin, or the front partition sheet contains polyarylate-based high-strength fiber, aramid fiber, polyester and tarpaulin. It is affixed with a reinforcing sheet containing fibers selected from the group of
The front partition sheet has a tensile strength of 3030 N/3 cm or more.
The containment booth of claim 1. The containment booth includes:
a front center-side balloon extending along the tunnel center-side edge of the front partition sheet and filling a gap between the front partition sheet and the side partition sheet;
at least one of a rear central balloon extending along a tunnel central side edge of the rear partition sheet and filling a gap between the rear partition sheet and the side partition sheet;
A containment booth according to claim 1 or 3. The containment booth includes:
a wall-side balloon extending along the wall-side peripheral edge of the front partition sheet and filling a gap between the peripheral wall of the tunnel and the wall-side peripheral edge of the front partition sheet facing the peripheral wall;
a front center-side balloon extending along the tunnel center-side edge of the front partition sheet and filling a gap between the front partition sheet and the side partition sheet;
a bridging balloon extending along the width direction of the front partition sheet and bridging between the wall-side balloon and the front center-side balloon;
The containment booth of claim 1. The side partition sheet can be opened and closed in the longitudinal direction of the tunnel along the rail ,
With the side partition sheet opened, the tunnel construction machine used for tunnel construction can enter and exit from the inside and outside of the containment booth from the side.
The containment booth of claim 1 .

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