JP7009287B2 - Anti-scattering device and anti-scattering method - Google Patents

Description

The present invention relates to a scattering prevention device and a scattering prevention method for preventing the scattering of dust inside a tunnel.

In Patent Document 1, an outer peripheral surface air tube that swells along the inner peripheral surface of a tunnel, a vertical reinforcing air tube that supports the outer peripheral surface air tube on the inner circumference of the outer peripheral surface air tube, and an outer peripheral surface air tube are attached. A tunnel ventilator with a semi-circular partition film having approximately the same area as the cross section of the tunnel is described. Air supply / exhaust ports are provided on each of the outer peripheral surface air tube and the vertical reinforcing air tube. By supplying compressed air to the outer peripheral air tube from the air supply / exhaust port of the outer peripheral air tube and supplying compressed air to the vertical reinforcing air tube from the air supply / exhaust port of the vertical reinforcing air tube, the ventilation partition for the tunnel becomes the cross section of the tunnel. Spreads along the shape of.

Patent Document 2 describes an in-tunnel moving partition device that partitions a tunnel wall portion in order to cure the concrete placed in the process of constructing the tunnel. The moving partition device in the tunnel is provided with an annular tube that adheres to the inside of the wall portion of the tunnel constructed in the ground through a sheet. In this in-tunnel moving partition device, a sheet partitions the inside of the tunnel by inflating the annular tube by injecting a fluid such as air into the annular tube. Further, a holding rod having an arc-shaped tube holding portion at both ends is attached to the inner circumference of the annular tube, and the annular tube is prevented from hanging by pressing the inner circumference of the annular tube at each of both ends of the holding rod. ..

Japanese Unexamined Patent Publication No. 5-231100 Utility Model Registration No. 3075320

By the way, when performing various operations inside the tunnel, dust may be scattered inside the tunnel. The inside of the tunnel is blown for ventilation and the like, and the dust inside the tunnel is scattered by the air flow. Dust can be scattered far away by air currents, which can cause irrecoverable problems. Therefore, it is required to prevent the scattering of dust inside the tunnel.

In addition, since vehicles such as railroad cars or automobiles pass through the tunnel, it may be necessary to complete the construction of the tunnel in a short time. For example, at midnight when the vehicle does not run, the work equipment used for tunnel construction must be brought in, the work equipment must be installed, the work must be performed, and the work equipment must be withdrawn after the work is completed. It may be necessary to complete the loading, installation, work and withdrawal of work equipment in a few hours. However, in the above-mentioned ventilation partition for tunnel and the moving partition device in the tunnel, it takes time to carry in and withdraw each device, so that there is room for improvement in the workability of the work inside the tunnel. In this way, improvement of workability inside the tunnel is required.

The present invention prevents dust from scattering inside the tunnel, and quickly and reliably installs and removes a device for limiting the work space to a certain section length inside the tunnel. It is an object of the present invention to provide an anti-scattering device and an anti-scattering method capable of improving the above.

The shatterproof device according to the present invention supports the first balloon portion and the first balloon portion that come into contact with the inner peripheral surface of the tunnel and extend along the circumferential direction of the tunnel, and communicate with the internal space of the first balloon portion. A second balloon portion having an internal space and a sheet connected to the first balloon portion and partitioning the cross section of the tunnel are provided, and are provided in pairs along the axial direction of the tunnel and move in the axial direction of the tunnel. A trolley on which a first balloon portion, a second balloon portion and a seat are mounted is provided, and the second balloon portion extends from the trolley to the first balloon portion.

The shatterproof device according to the present invention includes a first balloon portion that comes into contact with the inner peripheral surface of the tunnel and extends along the circumferential direction of the tunnel, and a second balloon portion that supports the first balloon portion. The internal space of the portion and the internal space of the second balloon portion are in communication with each other. Therefore, by supplying air to the internal space of the first balloon portion to bring the first balloon portion into close contact with the inner peripheral surface of the tunnel and partitioning the cross section of the tunnel with a sheet, dust scattering inside the tunnel is prevented. be able to. Further, by supplying air to the second balloon portion, both the first balloon portion and the second balloon portion can be inflated at one time. Therefore, since the first balloon portion and the second balloon portion can be inflated or withdrawn in a short time, workability can be improved. Further, the anti-scattering devices according to the present invention are provided in pairs along the axial direction of the tunnel. Therefore, by using the space between the anti-scattering devices provided as a pair as the work space, it is possible to prevent the dust from scattering to the outside of the work space even if the dust is scattered inside the work space. Therefore, by providing a pair of scattering prevention devices for suppressing the scattering of dust, it is possible to quickly and surely install a work space for performing the work of scattering the dust, which contributes to the improvement of workability.

Further, the shatterproof device includes a second balloon portion that extends from a carriage that moves in the axial direction of the tunnel to the first balloon portion and supports the first balloon portion, and a sheet that is connected to the first balloon portion. The bogie, the second balloon portion, the first balloon portion and the seat are connected to each other. Therefore, the bogie can be moved in the axial direction of the tunnel with the second balloon portion, the first balloon portion, and the seat mounted on the bogie. Therefore, before inflating the first balloon portion and the second balloon portion, and after deflating the first balloon portion and the second balloon portion, the entire shatterproof device can be mounted on the trolley and moved in the axial direction of the tunnel. can. As a result, each component of the shatterproof device can be carried in and out in a short time, so that the workability of the work performed inside the tunnel can be improved.

Further, the above-mentioned anti-scattering device may be provided with a stretch rope that extends from either the first balloon portion or the second balloon portion and suppresses the movement of the first balloon portion in the axial direction of the tunnel. In this case, the extension rope can suppress the movement of the first balloon portion in close contact with the inner peripheral surface of the tunnel in the axial direction. Further, since the position of the first balloon portion can be easily finely adjusted by pulling the extension rope, the workability of the work of installing the first balloon can be improved.

Further, the above-mentioned shatterproof device may include a first length adjusting unit for adjusting the length of the first balloon portion and a second length adjusting unit for adjusting the length of the second balloon portion. .. In this case, since the length of the first balloon portion or the second balloon portion can be adjusted according to the site, the versatility of the shatterproof device can be enhanced.

Further, the sheet may be formed in a mesh shape. By the way, inside the tunnel, ventilation is performed for ventilation, and the first balloon portion, the second balloon portion and the seat receive the air flow flowing in the axial direction by this ventilation. As described above, when the sheet is formed in a mesh shape, the air flow flowing in the axial direction can be released, so that the force in the axial direction due to the air flow can be passed. Therefore, it is possible to more reliably suppress the tilting of the first balloon portion, the second balloon portion and the seat due to the air flow.

Further, the above-mentioned shatterproof device may include a weight for sandwiching and fixing the sheet. In this case, by sandwiching and fixing the sheet with a weight, it is possible to prevent the sheet from fluttering due to an air flow or the like flowing in the axial direction. Therefore, it is possible to more reliably prevent the scattering of dust.

Further, one end of the above-mentioned extension rope may be fixed to the first balloon portion, and the other end of the extension rope may be fixed in a state where the first balloon portion is pulled in the axial direction. In this case, the position of the extension rope can be stabilized by fixing one end of the extension rope to the first balloon portion. Further, by fixing the other end of the extension rope in a state where the first balloon portion is pulled in the axial direction, the inclination of the first balloon portion in the axial direction can be suppressed more reliably.

The scattering prevention method according to the present invention is a scattering prevention method for preventing the scattering of dust by using a scattering prevention device provided with a first balloon portion, a second balloon portion and a sheet, and is a first balloon portion and a second balloon. The step of moving the part and the sheet in the axial direction of the tunnel, the step of inflating the second balloon part and the first balloon part by injecting air into the second balloon part, and the step of inflating the second balloon part and the first balloon part. A step of contacting the inner peripheral surface of the tunnel with the first balloon portion standing upright along the circumferential direction of the tunnel and a step of partitioning the cross section of the tunnel with a sheet are provided, and the anti-scattering device is provided along the axial direction of the tunnel. It is provided in a pair and includes a trolley that moves in the axial direction of the tunnel and mounts a first balloon portion, a second balloon portion, and a seat, and the second balloon portion extends from the trolley to the first balloon portion.

In the shatterproof method according to the present invention, air is introduced into the second balloon portion to inflate the second balloon portion and the first balloon portion. Therefore, by bringing the inflated first balloon portion into close contact with the inner peripheral surface of the tunnel and partitioning the cross section of the tunnel with a sheet, it is possible to prevent dust from scattering inside the tunnel. In addition, both the second balloon portion and the first balloon portion can be inflated at the same time by injecting air into the second balloon portion. Therefore, both the first balloon portion and the second balloon portion can be inflated or withdrawn in a short time, so that workability can be improved. Further, in the shatterproof method according to the present invention, a pair of shatterproof devices are provided along the axial direction of the tunnel. Therefore, by using the space between the pair of anti-scattering devices as the work space, it is possible to prevent the dust from scattering to the outside of the work space even if the dust is scattered inside the work space. Therefore, as with the above-mentioned anti-scattering device, the work space can be quickly and surely installed by providing a pair of anti-scattering devices, which contributes to the improvement of workability.

Further, in the moving step, the carriage may be moved in the axial direction of the tunnel. In this case, the carriage moves in the axial direction of the tunnel with the first balloon portion, the second balloon portion, and the seat mounted on the carriage. Therefore, before inflating the first balloon portion and the second balloon portion, and after deflating the first balloon portion and the second balloon portion, the entire shatterproof device can be mounted on the trolley and moved in the axial direction of the tunnel. can. As a result, each component of the shatterproof device can be carried in and out in a short time, so that the workability of the work performed inside the tunnel can be improved.

Further, in the moving step, each of the two shatterproof devices is arranged so as to be separated from each other along the axial direction, and the step of inflating the two shatterproof devices, the step of contacting the inner peripheral surface, and the step of partitioning the cross section of the tunnel 2 A step of forming a work space between the two shatterproof devices may be provided by partitioning the cross section of the tunnel by each of the sheets of the shatterproof device. In this case, by forming a work space between the two shatterproof devices, it is possible to prevent dust from leaking from the work space. Therefore, it is possible to perform work in which dust is generated inside the work space. Further, since each of the two shatterproof devices can be carried in and out in a short time, the work space can be formed and removed in a short time.

According to the present invention, it is possible to prevent the scattering of dust inside the tunnel and improve the workability of the work performed inside the tunnel.

It is sectional drawing which shows an example of the work site using the anti-scattering device which concerns on embodiment. It is sectional drawing which looked at the work site of FIG. 1 from the top. (A) is a figure which shows a part of the synthetic segment in the work site of FIG. (B) is a plan view showing a part of the segment of FIG. 3 (a). (C) is a diagram schematically showing a cross section taken along line AA of FIG. 3 (b). It is sectional drawing which shows the part of the ductile segment in the work site of FIG. 1 schematically. It is a front view which shows the shatter prevention device of FIG. It is a side sectional view which shows the shattering prevention device of FIG. 1 in the cross section of the tunnel along the plane including the axial direction of the tunnel. It is a figure which shows one form of the shatter prevention device of FIG.

Hereinafter, embodiments of the anti-scattering device and the anti-scattering method according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same or corresponding elements are designated by the same reference numerals, and duplicate description will be omitted as appropriate. In addition, the drawings may be partially simplified or exaggerated for the sake of easy understanding, and the dimensional ratios and the like are not limited to those described in the drawings.

As shown in FIGS. 1 and 2, the scattering prevention device 1 according to the present embodiment is a device for preventing the scattering of dust inside the tunnel T. The tunnel T is, for example, an arc-shaped shield tunnel provided with a track T1 and a third rail T2, and both the track T1 and the third rail T2 extend along the axial direction D1 of the tunnel T. As an example, the tunnel T is a subway tunnel, and the track T1 is a railroad track through which a subway train passes. The third rail T2 is a third rail for supplying power to a subway train, and the train collects electricity by rubbing the third rail T2 with the collecting shoes of the train. Further, inside the tunnel T, wiring different from the third rail T2 (wiring T4 and the like in FIG. 5) is provided along the axial direction D1.

The work using the shatterproof device 1 inside the tunnel T is performed, for example, at midnight from the end of the subway operation to the start of the operation. The work of the tunnel T using the shatterproof device 1 is, for example, the work of cleaning the inner peripheral surface T3 of the tunnel T and the work of repairing the shield tunnel. As an example, the work of the tunnel T using the shatterproof device 1 is performed to prevent salt damage and extend the life of the tunnel T, and shot blast is applied to the inner peripheral surface T3 of the tunnel T to remove rust on the iron surface. After that, apply rust preventive to the iron surface to prevent rust.

As shown in FIGS. 3 (a) to 3 (c) and FIG. 4, the tunnel T includes a synthetic segment G1 and a ductile segment G2 (made of cast iron) as segments for holding earth and sand. The tunnel T is constructed by a shield method in which segments are assembled by a shield machine, and the tunnel T is constructed by pushing out a shield machine based on the segments while assembling the segments and proceeding with excavation.

The synthetic segment G1 includes a steel skin plate G11 and a concrete G13. The steel skin plate G11 is located on the inner surface of the synthetic segment G1 and the reinforcing bars are covered with concrete G13. The skin plate G11 has an integral structure by the gibber bar G12 embedded in the concrete G13. The ductile segment G2 is a segment made of cast iron (ductile). The ductile segment G2 includes a skeleton G21 arranged along the circumferential direction and the axial direction D1 of the tunnel T.

As shown in FIGS. 1 and 2, the work of the tunnel T is performed in the work space S between the two shatterproof devices 1 arranged along the axial direction D1. A worker M (see FIG. 7) enters the work space S, and the worker M performs work such as shot blasting. In the work of applying shot blasting to the inner peripheral surface T3 of the tunnel T, dust is generated when the granules as the projection material collide with the inner peripheral surface T3. In the present specification, "dust" includes a blast material (projection material) made of iron, aluminum, stainless steel, etc., and "preventing the scattering of dust" means preventing the scattering of the blast material, etc. Is included. The blast material may be a reusable projection material.

A pair of anti-scattering devices 1 provided along the axial direction D1 are provided to prevent dust generated in the work space S from scattering to the outside of the work space S. The distance between the pair of shatterproof devices 1 (distance in the axial direction D1) may be, for example, 5.5 m or more and 9 m or less, and the distance in the axial direction D1 of the work space S may be about 3 m. The distance between the pair of shatterproof devices 1 is 5.5 m or more to dilute the dust, and the distance between the pair of shatterproof devices 1 is 9 m or less to clean the dust after construction. It can be done easily.

In the work space S, for example, a scaffolding A1 used for shot blasting is provided, and the scaffolding A1 is a scaffolding carriage that can move along the track T1. Further, a dust collector A8 for sucking dust is arranged outside the work space S. Further, around the scaffold A1, the curing sheet A2 is used for curing to protect the track structures such as the track T1 and the third rail T2, and the scaffold A1 is further provided on the curing sheet A2. In addition, in FIG. 1, the illustration of the curing sheet A2 is omitted.

The curing sheet A2 is arranged, for example, between a pair of shatterproof devices 1 and below each shatterproof device 1. The curing sheet A2 may be a flameproof sheet. The curing sheet A2 is arranged in every corner of the track structure so that dust such as abrasives does not enter. One curing sheet A2 is arranged in the work space S, another curing sheet A2 is further arranged on each side of the axial direction D1 of the curing sheet A2, and for example, a total of three curing sheets A2 are arranged. .. The curing sheet A2 is a sheet provided to facilitate the recovery of dust due to shot blasting, and the dust on the curing sheet A2 is sucked or swept by the blasting machine A4 during or after the work. Dust can be easily collected.

On one side of the three curing sheets A2 in the axial direction D1, a toro trolley A5, a motor car A6, and a toro trolley A7 equipped with two work trolleys A3 and two blast machines A4 are provided. The work trolley A3, the blast machine A4, the toro trolleys A5 and A7, and the motor car A6 are work equipment used in the work of the tunnel T. The work trolley A3 is provided, for example, for performing painting work. For example, the work trolleys A3, the toro trolleys A5 and A7, and the motor car A6 are movable along the track T1, and are moved on the track T1 by the motor car A6. However, the work equipment used in the work of the tunnel T is not limited to the work trolley A3, the blast machine A4, the toro trolleys A5 and A7, and the motor car A6, and can be appropriately changed.

As described above, the anti-scattering devices 1 provided in pairs along the axial direction D1 are shielding walls (air tents) that shield dust scattered in the work space S. The scattering prevention device 1 is a balloon-type shielding wall that inflates due to the inflow of air, and prevents dust from scattering to the outside of the work space S by being in close contact with the inner peripheral surface T3. In addition, in FIG. 1 and FIG. 2, the illustration of the shatterproof device 1 is simplified. Hereinafter, the internal configuration of the tunnel T will be further described, and the configuration of the shatterproof device 1 will be described.

FIG. 5 is a front view of the scattering prevention device 1 as viewed along the axial direction D1. FIG. 6 is a cross-sectional view showing a scattering prevention device 1 when the tunnel T is cut along the axial direction D1. FIG. 7 is a perspective view showing the shatterproof device 1 installed in the tunnel T. As shown in FIGS. 5 to 7, the tunnel T is appropriately provided with a track T1, a third rail T2, a wiring T4, and a scaffold T5. The third rail T2 is provided on the end side of the track T1 in the direction D2 which is the width direction of the track T1. The wiring T4 is provided further on the end side of the direction D2 of the third rail T2. The scaffold T5 is installed at both ends of the direction D2 of the inner peripheral surface T3. For example, the height of the scaffold T5 on the wiring T4 side is higher than the height of the scaffold T5 located on the opposite side of the wiring T4.

The shatterproof device 1 extends from the trolley 11 to the trolley 11 moving along the axial direction D1 in the direction D3 which is the height direction of the tunnel T, and is in close contact with the inner peripheral surface T3 in the circumferential direction of the inner peripheral surface T3. It includes an extending balloon 20 and a sheet 30 that hangs down from the balloon 20 and partitions the cross section of the tunnel T. The dolly 11 is, for example, a Toro dolly traveling on the track T1. As an example, the trolley 11 is a four-wheeled light rail toro that can be moved by human power, and may be an aluminum light rail toro.

The balloon 20 is made of resin and is made of, for example, a polyester sheet. This makes it possible to increase the flexibility, airtightness and durability of the balloon 20. The balloon 20 is fixed on the carriage 11. The balloon 20 includes a first balloon portion 21 that extends along the inner peripheral surface T3 of the tunnel T and is in close contact with the inner peripheral surface T3, and a second balloon portion 22 that extends from the carriage 11 to the first balloon portion 21. For example, the first balloon portion 21 is an arc-shaped balloon extending in an arc shape, and the sheet 30 is connected to the first balloon portion 21. The connecting portion 31 of the sheet 30 to the first balloon portion 21 is arranged so as to extend along the circumferential direction of the first balloon portion 21. The second balloon portion 22 is a vertical balloon extending vertically upward from the carriage 11.

The sheet 30 is a sheet-like member arranged so as to extend downward from the connecting portion 31 and covers the cross section of the tunnel T. The sheet 30 may be formed in a mesh shape, for example. Since the sheet 30 is formed in a mesh shape, the sheet 30 can pass the air flow inside the tunnel T and suppress the passage of dust. The sheet 30 may be a sheet having no mesh, or may be, for example, a polyethylene flameproof sheet. Further, the sheet 30 may be a soundproof sheet or a deodorant sheet. In this case, the sheet 30 can block the sound or odor.

The height (length in the vertical direction) of the sheet 30 is higher (longer) than the height of the cross section of the tunnel T. A part of the seat 30 extends from the first balloon part 21 along the second balloon part 22, and the lower side of the part of the seat 30 is bent along the carriage 11. A weight 12 may be provided on the portion of the seat 30 along the carriage 11, and the seat 30 may be sandwiched between the weight 12 and the carriage 11. Further, the lower side of the seat 30 extends to a portion other than the carriage 11, for example, the seat 30 may be sandwiched between the weight 12 and the ground.

The sheet 30 has a cut 32 extending along the direction D3, and a part of the sheet 30 has a bamboo blind shape. The cut 32 is for the worker M to enter and exit the work space S. Further, the cut 32 is also for passing the wiring T4 and the like through the sheet 30, and the wiring T4 is passed through the cut 32 in the axial direction D1. The wiring T4 passed through the cut 32 may be protected by a shock absorbing material 35 such as a sponge. Further, the cut 32 through which the wiring T4 is passed may be closed by a hook-and-loop fastener or tape in order to suppress the escape of air.

The dolly 11 includes a fixing portion 13 for fixing the balloon 20. The fixing portion 13 has, for example, a ring shape that surrounds and supports the second balloon portion 22. As an example, the fixing portion 13 is made of metal. The second balloon portion 22 has an internal space 22a into which air flows, and when air flows into the internal space 22a, the second balloon portion 22 extends in the direction D3, for example, in a cylindrical shape. At the lower part of the second balloon portion 22, one inflow portion 22b for flowing air into the internal space 22a of the second balloon portion 22 is provided, and the blower 14 (see FIGS. 1 and 2) is connected to the inflow portion 22b. It is possible to inflate the second balloon portion 22 by the method. The blower 14 is, for example, a 100V blower.

The first balloon portion 21 extends in pairs from the upper end of the second balloon portion 22 to the left and right. The first balloon portion 21 has an internal space 21a communicating with the internal space 22a of the second balloon portion 22. Therefore, when air flows into the second balloon portion 22 from the inflow portion 22b by the blower 14, the first balloon portion 21 expands together with the second balloon portion 22. The first balloon portion 21 has a plurality of seams 21d arranged side by side along the circumferential direction of the tunnel T, and air is discharged from the plurality of seams 21d. A discharge valve for discharging air may be provided in the first balloon portion 21 or the second balloon portion 22.

The first balloon portion 21 has a large diameter portion 21b continuous with the second balloon portion 22 and a small diameter portion 21c extending from the large diameter portion 21b to both ends of the direction D2. The small diameter portion 21c may be provided only on one side of the direction D2 of the large diameter portion 21b. Further, if the equipment or the like becomes an obstacle, it is possible to form a sheath structure from the large diameter portion 21b to the small diameter portion 21c, and in the present embodiment, the small diameter portion 21c is provided to avoid the electrical equipment. The small diameter portion 21c may be omitted depending on the condition of the equipment. However, as described above, since at least one of both ends of the direction D2 of the first balloon portion 21 is the small diameter portion 21c, the first balloon portion 21 can be inserted into the end portion side of the direction D2 of the wiring T4. can. In FIG. 5, for simplification, the large diameter portion 21b, the small diameter portion 21c, and the seam 21d are not shown.

The first balloon portion 21 includes a first length adjusting portion 21e that adjusts the length of the tunnel T in the circumferential direction. The first length adjusting portion 21e is provided, for example, at the circumferential end of the first balloon portion 21. The first length adjusting portion 21e has a bellows shape as an example, and can be expanded and contracted in the circumferential direction of the tunnel T. The second balloon portion 22 includes a second length adjusting portion 22c that adjusts the length in the direction D3, and the second length adjusting portion 22c is provided, for example, at the lower end of the second balloon portion 22. The second length adjusting portion 22c may have a bellows shape like the first length adjusting portion 21e, and can be expanded and contracted in the direction D3. In FIG. 7, for the sake of simplification, the illustration of the first length adjusting unit 21e and the second length adjusting unit 22c is omitted.

A stretch rope 33 that determines the position of the first balloon portion 21 in the axial direction D1 extends from the first balloon portion 21. The extension rope 33 may extend from the second balloon portion 22. A plurality of extension ropes 33 are provided, for example, and are fixed to the first balloon portion 21 in advance. The extension rope 33 is a positioning rope that determines the position of the balloon 20 in the axial direction D1, and the position of the balloon 20 can be finely adjusted by adjusting the pulling condition of the extension rope 33. One end 33a of the extension rope 33 is fixed to the first balloon portion 21, and the extension rope 33 extends diagonally downward from one end 33a in the axial direction D1.

The extension rope 33 may extend diagonally in the axial direction D1 and the direction D2. The extension rope 33 extends from the first balloon portion 21 in a pair on both sides in the axial direction D1, for example. Further, the other end 33b of each extension rope 33 is fixed to the scaffold T5 in a state of being pulled in the axial direction D1, for example. In this way, by pulling the first balloon portion 21 with the extension rope 33 from both sides in the axial direction D1 with an appropriate force in the axial direction D1, the balloon 20 is prevented from tipping over.

The first balloon portion 21 is provided with a holding member 34 that holds the first balloon portion 21 from the radial inside of the tunnel T. The holding members 34 are provided in pairs on each of the left and right sides of the second balloon portion 22, for example, and the pair of holding members 34 hold the first balloon portion 21 from both the left and right sides. The holding member 34 has, for example, a rod shape extending diagonally downward from the first balloon portion 21, and extends from the first balloon portion 21 to the carriage 11.

As an example, the holding member 34 holds the first balloon portion 21 by being pressed against the boundary portion between the large diameter portion 21b and the small diameter portion 21c of the first balloon portion 21. By pressing the holding member 34 against the boundary portion between the large diameter portion 21b and the small diameter portion 21c in this way, the holding member 34 can be easily pressed and the holding member 34 can hold the first balloon portion 21. It can be done more reliably.

The holding member 34 has a pressing portion 34a that is pressed against the first balloon portion 21, and a rod-shaped portion 34b that extends diagonally downward from the pressing portion 34a. The pressing portion 34a is made of a hard vinyl material such as vinyl chloride, that is, made of vinyl. The pressing portion 34a has a pair of frame portions 34c extending from the rod-shaped portion 34b on both the left and right sides, and the pair of frame portions 34c are pressed against the first balloon portion 21 from below. The rod-shaped portion 34b has, for example, a sheath tube structure, and the length of the holding member 34 can be adjusted. The lower end of the rod-shaped portion 34b may be fixed to, for example, a cylindrical fixing portion provided on the upper surface of the carriage 11.

Next, the scattering prevention method according to the present embodiment will be described. Since the shatterproof method according to the present embodiment is performed, for example, as a part of the repair work of the tunnel T of the subway, an example of the repair work of the tunnel T will be described below. The repair work of the tunnel T of the subway is a work to be carried out in the midnight time zone from the end of the subway operation to the start of the operation, and it is necessary to carry out the repair work in about 3 hours, for example.

First, as shown in FIGS. 1 and 2, the work equipment used in the repair work of the tunnel T is carried in (the step of carrying in). At this time, in the internal space of the tunnel T, three curing sheets A2 are laid, and the toro trolley A5, the motor car A6, and the toro trolley A7 equipped with the work trolley A3 and the blast machine A4 are moved on the track T1 for repair. Bring work equipment to the site to be constructed.

As described above, the work equipment is carried in, and the trolley 11 on which the first balloon part 21, the second balloon part 22, and the seat 30 are mounted is moved in the axial direction D1 of the tunnel T and carried into the site. At this time, the carriages 11 of the two shatterproof devices 1 are arranged so as to be separated from each other along the axial direction D1. After that, the scaffolding A1 is assembled on the curing sheet A2 between the two shatterproof devices 1, and the blast machine A4 is arranged between the two shatterproof devices 1 (not shown).

Next, as shown in FIGS. 5 to 7, air is introduced into the second balloon portion 22 on the carriage 11 to inflate the balloon 20 (step of inflating). At this time, the blower 14 is attached to the inflow portion 22b of the second balloon portion 22, and air is sent from the blower 14 to the internal space 22a of the second balloon portion 22 via the inflow portion 22b, whereby the first balloon portion 21 and the second balloon portion 21 and the second balloon portion 22 are sent. Inflate the balloon portion 22. The amount of air sent from the inflow portion 22b to the internal space 22a of the second balloon portion 22 is, for example, constant, and air is continuously sent from the inflow portion 22b to the internal space 22a even during work such as shot blasting.

A small amount of the air sent into the internal space 22a and the internal space 21a of the first balloon portion 21 is discharged from the seam 21d of the first balloon portion 21, but the first balloon portion 21 and the second balloon portion 22 are gradually discharged. The bulge, the first balloon portion 21 and the second balloon portion 22 have an appropriate hardness to the extent that the inner peripheral surface T3 of the tunnel T can be pressed. Since the air sent into the internal space 21a is appropriately discharged from the seam 21d, the first balloon portion 21 and the second balloon portion 22 are maintained at an appropriate hardness even if the air is continuously introduced. The time from when air is introduced into the inflow portion 22b until the first balloon portion 21 and the second balloon portion 22 have an appropriate hardness is, for example, about 30 seconds.

Subsequently, the inflated second balloon portion 22 and the first balloon portion 21 are erected, and the first balloon portion 21 comes into contact with the inner peripheral surface T3 of the tunnel T so as to follow the circumferential direction of the tunnel T. (The process of contacting the inner peripheral surface). When the first balloon portion 21 and the second balloon portion 22 are sufficiently inflated and hardened to some extent, the first balloon portion 21 and the second balloon portion 22 can be lifted, and the lifted first balloon portion 21 is inside the tunnel T. By being pressed against the peripheral surface T3, the first balloon portion 21 comes into close contact with the inner peripheral surface T3.

At this time, the holding member 34 is installed and the first balloon portion 21 is pressed from below by the holding member 34 (step of installing the holding member). Specifically, the frame portion 34c of the pressing portion 34a is pressed against the boundary portion between the large diameter portion 21b and the small diameter portion 21c of the first balloon portion 21 from below, and the rod-shaped portion 34b is pressed against the fixing portion on the carriage 11. Fix it. Further, the extension rope 33 is pulled to position the first balloon portion 21 in the axial direction D1 (positioning step).

Specifically, as shown in FIG. 6, of the plurality of stretched ropes 33, for example, one stretched rope 33 is pulled out to one side in the axial direction D1, and the other stretched rope 33 is pulled out in the axial direction D1. Pull it out to the other side. Then, the tension of each extension rope 33 is adjusted to finely adjust the position of the first balloon portion 21, and after the fine adjustment of the position is completed, the other end 33b of each extension rope 33 is fixed to the scaffold T5. The other end 33b of the extension rope 33 may be fixed to a place other than the scaffold T5.

Then, as shown in FIGS. 5 to 7, the cross section of the tunnel T is partitioned by the sheet 30 extending downward from the first balloon portion 21 (step of partitioning the cross section of the tunnel). At this time, the wiring T4 is protected by the shock absorbing material 35 while passing the wiring T4 or the like through the cut 32 of the sheet 30, and the sheet 30 is hung from the first balloon portion 21 to close the tunnel T with the sheet 30. Specifically, the end portion of the sheet 30 is attached to the lower portion and the left and right ends of the tunnel T with tape or the like, or the end portion of the sheet 30 is fixed by placing a weight 12 on the lower portion of the tunnel T to close the tunnel T with the sheet 30. By closing the tunnel T with the sheet 30 in this way, the installation of the shatterproof device 1 is completed. It should be noted that the time required from the delivery of the work equipment to the installation of the shatterproof device 1 is, for example, several tens of minutes.

The above-mentioned step of inflating, the step of contacting the inner peripheral surface, and the step of partitioning the cross section of the tunnel are performed for each of the two shatterproof devices 1. As a result, as shown in FIGS. 1 and 2, in each of the two shatterproof devices 1, the cross section of the tunnel T is partitioned by the sheet 30 of each shatterproof device 1 through the above steps. A work space S is formed between the shatterproof devices 1 (step of forming the work space).

After the work space S is formed, shot blasting is performed on the inner peripheral surface T3 in the work space S by a blast machine to perform repair work on the tunnel T. After the repair work is completed, the dust from the shot blast or the like is swept or sucked in to clean up the dust and the curing sheet A2 or the like is withdrawn. Then, after stopping the inflow of air into the balloon 20 and removing the air from the first balloon portion 21 and the second balloon portion 22 to clean up the scattering prevention device 1, the scattering prevention device 1, the work cart A3, and the blast machine A4 are used. A series of work is completed by withdrawing the mounted Toro trolley A5, motor car A6 and Toro trolley A7. The loading, installation, work and withdrawal of work equipment in this work are completed in, for example, about 3 hours.

Next, the action and effect obtained from the shatterproof device 1 and the shatterproof method according to the present embodiment will be described in detail. As shown in FIGS. 5 to 7, the shatterproof device 1 and the shatterproof method according to the present embodiment come into contact with the inner peripheral surface T3 of the tunnel T and extend along the circumferential direction of the tunnel T. 21 and a second balloon portion 22 that supports the first balloon portion 21 are provided, and the internal space 21a of the first balloon portion 21 and the internal space 22a of the second balloon portion 22 communicate with each other. Therefore, by supplying air to the internal space 21a of the first balloon portion 21, the first balloon portion 21 is brought into close contact with the inner peripheral surface T3 of the tunnel T, and the cross section of the tunnel T is partitioned by the sheet 30 to form the tunnel T. It is possible to prevent the scattering of dust inside.

Further, the shatterproof devices 1 according to the present embodiment are provided in pairs along the axial direction D1 of the tunnel T. Therefore, by setting the space between the anti-scattering devices 1 provided in a pair as the work space S, even if the dust is scattered inside the work space S, it is possible to suppress the dust from being scattered outside the work space S. Can be done. Therefore, by providing a pair of scattering prevention devices 1 for suppressing the scattering of dust, it is possible to quickly and surely install the work space S for performing the work of scattering the dust, which contributes to the improvement of workability.

Further, by supplying air to the second balloon portion 22 extending from the carriage 11 to the first balloon portion 21, both the first balloon portion 21 and the second balloon portion 22 can be inflated at one time. Therefore, since the first balloon portion 21 and the second balloon portion 22 can be inflated or withdrawn in a short time, workability can be improved. Further, the shatterproof device 1 extends from the carriage 11 moving in the axial direction D1 of the tunnel T to the first balloon portion 21, and is connected to the second balloon portion 22 that supports the first balloon portion 21 and the first balloon portion 21. It is provided with a sheet 30 to be formed. The carriage 11, the second balloon portion 22, the first balloon portion 21, and the seat 30 are connected to each other. Therefore, the trolley 11 can be moved in the axial direction D1 of the tunnel T with the second balloon portion 22, the first balloon portion 21, and the seat 30 mounted on the trolley 11, so that the scattering prevention device 1 can be carried in and removed. Can be easily performed.

Therefore, before inflating the first balloon portion 21 and the second balloon portion 22, and after inflating the first balloon portion 21 and the second balloon portion 22, the entire shatterproof device 1 is placed on the carriage 11 and the tunnel T is formed. It can be moved in the axial direction D1. As a result, each component of the shatterproof device 1 can be carried in and out in a short time, so that the workability of the work performed inside the tunnel T can be improved.

Further, the shatterproof device 1 includes a stretch rope 33 that extends from either the first balloon portion 21 or the second balloon portion 22 and suppresses the movement of the first balloon portion 21 in the axial direction D1. Therefore, the extension rope 33 can suppress the movement of the first balloon portion 21 in close contact with the inner peripheral surface T3 of the tunnel T in the axial direction D1. Further, since the position of the first balloon portion 21 can be easily finely adjusted by pulling the extension rope 33, the workability of the work of installing the first balloon portion 21 can be improved.

Further, the shatterproof device 1 includes a first length adjusting unit 21e that adjusts the length of the first balloon unit 21, and a second length adjusting unit 22c that adjusts the length of the second balloon unit 22. .. Therefore, since the length of the first balloon portion 21 or the second balloon portion 22 can be adjusted according to the site, the shatterproof device 1 can be used in different tunnels, and the versatility of the shatterproof device 1 is enhanced. be able to.

Further, the sheet 30 may be formed in a mesh shape. By the way, inside the tunnel T, air is blown for ventilation, and the first balloon portion 21, the second balloon portion 22, and the sheet 30 receive the air flow flowing in the axial direction D1 by this blowing. When the sheet 30 is formed in a mesh shape as described above, the air flow flowing in the axial direction D1 can be released, so that the force due to the air flow in the axial direction D1 can be passed. Therefore, it is possible to more reliably suppress the tilting of the first balloon portion 21, the second balloon portion 22, and the sheet 30 due to the air flow. Even if the sheet 30 is not formed in a mesh shape, the same effect as described above can be obtained if the sheet 30 has a cut 32.

Further, the shatterproof device 1 includes a weight 12 that sandwiches and fixes the sheet 30. Therefore, by sandwiching and fixing the sheet 30 with the weight 12, it is possible to prevent the sheet 30 from fluttering due to an air flow or the like flowing in the axial direction D1. Therefore, it is possible to more reliably prevent the scattering of dust.

Further, one end 33a of the extension rope 33 is fixed to the first balloon portion 21, and the other end 33b of the extension rope 33 is fixed in a state where the first balloon portion 21 is pulled in the axial direction D1. Therefore, by fixing one end 33a of the extension rope 33 to the first balloon portion 21, the position of the extension rope 33 can be stabilized. Further, by fixing the other end 33b of the extension rope 33 in a state where the first balloon portion 21 is pulled in the axial direction D1, the inclination of the first balloon portion 21 in the axial direction D1 can be more reliably suppressed. ..

Further, in the scattering prevention method according to the present embodiment, in the moving step described above, as shown in FIGS. 1 and 2, the carriages 11 of the two scattering prevention devices 1 are separated from each other along the axial direction D1. By partitioning the cross section of the tunnel T by each of the sheets 30 of the two shatterproof devices 1, through the steps of arranging and inflating the tunnel, contacting the inner peripheral surface, and partitioning the cross section of the tunnel. A step of forming a work space S between the shatterproof devices 1 is provided.

Therefore, by forming the work space S between the two shatterproof devices 1, it is possible to suppress the leakage of dust from the work space S. Therefore, it is possible to perform work in which dust is generated inside the work space S. Further, since each of the two shatterproof devices 1 can be carried in and out in a short time, the work space S can be formed and removed in a short time.

Although the embodiment of the anti-scattering device and the anti-scattering method according to the present invention has been described above, the present invention is not limited to the above-described embodiment and is modified to the extent that the gist described in each claim is not changed. Or it may be applied to something else. That is, the configuration of each part of the shatterproof device and the content and order of each step of the shatterproof method are not limited to the contents of the above-described embodiment and can be appropriately changed.

For example, in the above-described embodiment, the example in which the sheet 30 is stopped by the weight 12 has been described, but instead of the weight 12, the sheet 30 may be stopped by, for example, a tape. That is, the fixing means of the sheet 30 can be changed as appropriate.

Further, in the above-described embodiment, the shatterproof device 1 including the first balloon portion 21 which is an arc-shaped balloon and the second balloon portion 22 which is a vertical balloon has been described. However, the shape, size and number of the first balloon portion and the second balloon portion can be appropriately changed. For example, instead of the second balloon portion 22 which is one vertical balloon, a plurality of Y-shaped second balloon portions may be provided, or a W-shaped second balloon portion may be provided. good.

Further, in the above-described embodiment, an example in which the first balloon portion 21, the second balloon portion 22, and the seat 30 are mounted on the carriage 11 moving in the axial direction D1 of the tunnel T has been described. However, the means for carrying in and out the first balloon portion 21, the second balloon portion 22, and the seat 30 is not limited to the carriage 11, and can be appropriately changed. For example, the first balloon portion 21, the second balloon portion 22 and the seat 30 are loaded on the Toro trolley A5 and moved, and the first balloon portion 21, the second balloon portion 22 and the seat 30 are lowered from the Toro trolley A5 and placed on the floor surface. The shatterproof device 1 may be installed by placing it.

Further, in the above-described embodiment, the first balloon unit 21 including the first length adjusting unit 21e and the second balloon unit 22 including the second length adjusting unit 22c have been described. However, only one of the first balloon portion and the second balloon portion may include the length adjusting portion. Further, the length adjusting portion may be omitted, and the first balloon portion and the second balloon portion having a margin in length may be provided in advance.

Further, in the above-described embodiment, the tunnel T including the synthetic segment G1 and the ductile segment G2 has been described, but the configurations of the synthetic segment and the ductile segment can be changed as appropriate. The present invention is also applicable to tunnels having no synthetic segment and ductile segment.

Further, in the above-described embodiment, the tunnel T, which is an arc-shaped shield tunnel provided with the track T1 and the third rail T2, has been described, but the configuration of the tunnel can be changed as appropriate. For example, the shape of the tunnel does not have to be an arc shape, and may be another shape such as a parabolic shape or a rectangular shape. Further, the tunnel does not have to be a subway tunnel, and may be a mountain tunnel or the like. Further, the tunnel may be a tunnel having no track T1, for example, a tunnel through which an automobile passes. As described above, the present invention is applicable to various tunnels.

1 ... shatterproof device, 11 ... trolley, 12 ... weight, 13 ... fixed part, 14 ... blower, 20 ... balloon, 21 ... first balloon part, 21a ... internal space, 21b ... large diameter part, 21c ... small diameter part, 21d ... seam, 21e ... first length adjusting part, 22 ... second balloon part, 22a ... internal space, 22b ... inflow part, 22c ... second length adjusting part, 30 ... sheet, 31 ... connecting part, 32 ... Cut, 33 ... extension rope, 33a ... one end, 33b ... other end, 34 ... holding member, 34a ... pressing part, 34b ... rod-shaped part, 34c ... frame part, 35 ... shock absorber, A1 ... scaffold, A2 ... curing Seat, A3 ... work trolley, A4 ... blast machine, A5, A7 ... toro trolley, A6 ... motor car, A8 ... dust collector, D1 ... axis direction, D2, D3 ... direction, G1 ... synthetic segment, G2 ... ductile segment, G11 ... skin plate, G12 ... gibber muscle, G13 ... concrete, G21 ... skeleton, M ... worker, S ... work space, T ... tunnel, T1 ... track, T2 ... third rail, T3 ... inner peripheral surface, T4 ... wiring , T5 ... Scaffolding.

Claims (9)

A first balloon portion that comes into contact with the inner peripheral surface of the tunnel and extends along the circumferential direction of the tunnel,
A second balloon portion that supports the first balloon portion and has an internal space that communicates with the internal space of the first balloon portion.
A sheet connected to the first balloon portion and partitioning the cross section of the tunnel,
Equipped with
A pair of tunnels are provided along the axial direction of the tunnel.
It is provided with a trolley that moves in the axial direction of the tunnel and mounts the first balloon portion, the second balloon portion, and the seat.
The second balloon portion extends from the carriage to the first balloon portion.
Anti-scattering device. A stretch rope that extends from either the first balloon portion or the second balloon portion and suppresses the movement of the first balloon portion in the axial direction of the tunnel is provided.
The shatterproof device according to claim 1 . The first length adjusting portion for adjusting the length of the first balloon portion and the first length adjusting portion
A second length adjusting unit that adjusts the length of the second balloon unit,
The anti-scattering device according to claim 1 or 2 . The sheet is formed in a mesh shape.
The shatterproof device according to any one of claims 1 to 3 . A weight for sandwiching and fixing the sheet is provided.
The shatterproof device according to any one of claims 1 to 4 . One end of the stretch rope is fixed to the first balloon portion and is fixed to the first balloon portion.
The other end of the stretch rope is fixed in a state where the first balloon portion is pulled in the axial direction.
The shatterproof device according to claim 2 . It is a scattering prevention method for preventing the scattering of dust by using a scattering prevention device provided with a first balloon portion, a second balloon portion, and a sheet.
A step of moving the first balloon portion, the second balloon portion, and the sheet in the axial direction of the tunnel.
A step of inflating the second balloon portion and the first balloon portion by injecting air into the second balloon portion, and a step of inflating the second balloon portion and the first balloon portion.
A step of erecting the inflated second balloon portion and the first balloon portion and contacting the first balloon portion with the inner peripheral surface of the tunnel so as to follow the circumferential direction of the tunnel.
The process of partitioning the cross section of the tunnel with the sheet and
Equipped with
The shatterproof devices are provided in pairs along the axial direction of the tunnel.
It is provided with a trolley that moves in the axial direction of the tunnel and mounts the first balloon portion, the second balloon portion, and the seat.
The second balloon portion extends from the carriage to the first balloon portion.
How to prevent scattering. In the moving step, the dolly is moved in the axial direction of the tunnel.
The shatterproof method according to claim 7 . In the moving step, each of the two shatterproof devices is arranged so as to be separated from each other along the axial direction.
By partitioning the cross section of the tunnel with each of the sheets of the two shatterproof devices through the step of inflating, the step of contacting the inner peripheral surface, and the step of partitioning the cross section of the tunnel, the two shatterproofs are prevented. With the process of forming a work space between the devices,
The shatterproof method according to claim 7 or 8 .

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