JP2006305414A - Waste disposal site structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To dispose of industrial waste by using the inner space of an abolished tunnel as a land-filling site. <P>SOLUTION: A first covering layer 8 is provided with: a first buffering layer 15 consisting of nonwoven fabric which has attaching pieces 19 fixed to the tunnel inner face 3a and is covered on the tunnel inner face; a first water sealing layer 14 consisting of a water sealing sheet material formed in layers on the first buffering layer 15, and hook and loop fasteners 21 having male side engagement pieces. A second covering layer 9 is provided with: a second buffering layer 23 which consists of a nonwoven fabric capable of fitting to the hook and loop fasteners 21 and covers the first covering layer 8; a second water sealing layer 22 consisting of a water sealing sheet material formed in layers on the second buffering layer 23, and hook and loop fasteners 27 having male side engagement pieces fitted to non-woven fabric constituting an inner buffering layer 10. A double water sealing structure is formed by the first and second water sealing layers 14, 22 across the second buffering layer 23. Waste is filled in the space in the tunnel having the inner buffering layer 10 consisting of nonwoven fabric formed on the inner face. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a structure of a waste disposal site where a so-called industrial waste such as a waste is disposed and disposed in the tunnel using a tunnel.

  Wastes are landfilled properly at a specific disposal site, that is, in a facility where no harmful substances or the like are discharged into the soil. Generally, this disposal site has a structure recessed in the ground, and a predetermined impermeable construction is applied to the bottom surface to obtain a storage state. As a water-impervious construction, it is usually configured using a water-impervious sheet formed of a soft synthetic resin or rubber, and is also provided with a protective layer so that the water-impervious sheet is not damaged. .

  In addition, waste soil such as earth and sand generated by civil engineering construction is disposed of in a normal landfill site instead of industrial waste if the excavated soil does not contain harmful substances. However, in the case where a hazardous substance is contained or there is a possibility that a harmful substance is contained, it is discarded as a contaminated soil at a disposal site such as a recess provided with the above-described water shielding work.

  However, in a general waste disposal site, when a large amount of waste is processed at a time, a facility that can easily accommodate the large amount of waste may not be prepared.

  Therefore, in order to solve the above problems, the present invention has an object to provide a structure of a waste disposal site that uses a tunnel and uses the interior space as a landfill disposal site, so that waste can be discarded. .

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The structure of the waste disposal site according to claim 1 of the present invention is a structure of a waste disposal site using a tunnel,
A first covering layer 8 spread and fixed on the tunnel inner surface 3a;
A second coating layer 9 covering and spreading the surface of the first coating layer 8 on the downhole 3 side;
An inner buffer layer 10 made of a nonwoven fabric covering the second coating layer 9 and constituting the inner surface of the well;
Comprising
The first covering layer 8 includes a first buffer layer 15 made of a non-woven fabric that is disposed in contact with the tunnel inner surface 3a and is attached to the inner surface of the tunnel, and a shielding layer formed on the first buffer layer 15. A surface fastener 21 having a male side engaging piece and a first water shielding layer 14 made of a water sheet material is provided,
The second covering layer 9 is made of a nonwoven fabric that can be engaged with the surface fastener 21, and is laminated on the second buffer layer 23 and the second buffer layer 23 covering the first covering layer 8. A hook-and-loop fastener 27 having a male side engaging piece for engaging with a non-woven fabric constituting the inner buffer layer 10 is provided.
The first buffer layer 14 and the second waterproof layer 22 form a double waterproof structure with the second buffer layer 23 in between, and the inner buffer layer 10 forms an inner surface. It is characterized in that waste is buried in the tunnel space.

In the structure of this waste disposal site, the double impermeable layers 14 and 22 are arranged on the inner surface of the tunnel 2, and even if the waste 5 to be discarded contains harmful substances, it is leached. In addition, since the buffer layers 15, 23, and 10 are provided, it is possible to prevent the water shielding layers 14 and 22 from being damaged by the waste 5.
And, for example, by using the abolished tunnel 2 as a large space that is no longer used effectively by simply blocking the entrance and exit, there is no need for new work such as recesses, and a sufficient amount A place where waste can be accommodated can be prepared, and disposal work can be performed in a short construction period.

The structure of the waste disposal site according to claim 2 is a structure of a waste disposal site using a tunnel,
A first covering layer 8 spread and fixed on the tunnel inner surface 3a;
A second coating layer 9 covering and spreading the surface of the first coating layer 8 on the downhole 3 side;
An inner buffer layer 10 made of a nonwoven fabric covering the second coating layer 9 and constituting the inner surface of the well;
Comprising
The first covering layer 8 includes a first buffer layer 15 having a mounting piece 19 fixed to the tunnel inner surface 3a and made of a nonwoven fabric disposed in contact with the tunnel inner surface and deposited on the tunnel inner surface; A surface fastener 21 having a male side engaging piece and a first water shielding layer 14 made of a water shielding sheet material laminated on the first buffer layer 15;
The second cover layer 9 is made of a non-woven fabric that can be engaged with the surface fastener 21, and is laminated on the second buffer layer 23 and a second buffer layer 23 that covers the first cover layer 8. A hook-and-loop fastener 27 having a male side engaging piece for engaging with a non-woven fabric constituting the inner buffer layer 10 is provided.
The first buffer layer 14 and the second shield layer 22 form a double waterproof structure with the second buffer layer 23 interposed therebetween, and an inner surface is formed by the inner buffer layer 10. It is characterized in that waste is buried in the tunnel space.

  In the structure of the waste disposal site, the first covering layer 8 is provided with the mounting piece 19, so that it can be easily attached to the inner surface of the tunnel, and workability is improved.

  In the structure of the waste disposal site according to claim 3, at least the first covering layer 8 and the second covering layer 9 are supported in contact with the inner buffer layer 10 located at the ceiling portion in the pit. A supporting frame 34 is provided in the mine.

  In the structure of this waste disposal site, the support frame 34 supports the coating layers 8 and 9 from below, and the first and second coating layers 8 and 9 do not sag and hang down. For this reason, the coating layer does not interfere during the work of filling the waste in the pit 3.

  5. The structure of a waste disposal site according to claim 4, wherein the first covering layer 8 and / or the second covering layer 9 are formed in a strip shape having a predetermined length and a predetermined width, and a nonwoven fabric. Each of the layers is formed by joining the edge portions of the water-impervious sheet in each layer to the edge portions of the adjacent water-impervious sheet to cover the inner surface of the tunnel.

  In the structure of this waste disposal site, each coating layer is formed in a strip shape in advance, making it easy to manufacture each coating layer in a factory, etc., making it easy to carry into a tunnel mine, and ease of installation at the construction site. improves. In particular, the workability of extending to the underground plane is improved by winding and forming in a roll shape.

  In the structure of the waste disposal site according to claim 5, at least the second buffer layer 23 of the second covering layer 9 among the buffer layers made of the nonwoven fabric constituting the respective layers has the surface fastener 21 that is opposed to the surface fastener 21. A female surface fastener 37 to be engaged is provided.

  In the structure of this waste disposal site, for example, when the first coating layer 8 is covered with the second coating layer 9, the hook-and-loop fastener 37 of the second coating layer 9 and the first coating layer 8 are formed. The hook and loop fasteners 37 can be engaged with each other, and the layers 8 and 9 can be easily and reliably joined.

  The waste disposal site according to claim 6 is characterized in that concrete and / or sand are laid on the bottom surface 3d of the mine 3 covered with the inner buffer layer to constitute a road surface 31.

  In this waste disposal site structure, vehicles for carrying waste into the mine 3, disposal processing, landfill work, and the like can easily pass.

  In the structure of the waste disposal site according to claim 1 according to the present invention, a double impermeable layer is disposed on the inner surface of the tunnel, and even if the waste to be discarded contains harmful substances, Since it does not leach and is provided with a buffer layer, it is possible to prevent damage to the water shielding layer due to waste. And, for example, by using an abandoned tunnel, which is a large space that is no longer used effectively simply by blocking the entrance and exit, there is no need for new work such as recesses, and a sufficient amount of waste is discarded. It is possible to prepare a place where objects can be accommodated, and it is possible to perform disposal work in a short construction period.

  In the structure of the waste disposal site according to claim 2, since the mounting piece is provided on the first covering layer, it can be easily attached to the inner surface of the tunnel. Workability will be improved.

  In the structure of the waste disposal site according to the third aspect, the support frame supports each coating layer from below, and the first and second coating layers do not hang down. For this reason, the coating layer is not hindered during the work of reclaiming waste in the mine.

  In the structure of the waste disposal site according to claim 4, since each coating layer is formed in a strip shape in advance, it is easy to manufacture each coating layer in a factory or the like, and it is easy to carry into the tunnel mine. This improves the workability. In particular, the workability of extending to the underground plane is improved by winding and forming in a roll shape.

  In the structure of the waste disposal site according to claim 5, for example, when the first coating layer is covered with the second coating layer, the surface fastener of the second coating layer and the surface of the first coating layer The fasteners can be engaged with each other, and the layers can be easily and reliably joined.

  In the structure of the waste disposal site according to claim 6, concrete and / or sand is laid on the bottom surface in the mine covered with the inner buffer layer, and the road surface is configured, so that the waste can be carried into the mine. Vehicles or the like that perform disposal processing, landfill work, and the like can easily pass.

FIG. 1 is a sectional view showing an embodiment of a structure of a waste disposal site according to the present invention, FIG. 2 is a schematic front view of the structure of the waste disposal site, and FIG. 3 is a first water shielding layer. 4 is a schematic plan view of the water shielding sheet of FIG.
The structure of the waste disposal site of the present invention is such that, for example, the abandoned tunnel 2 which is a tunnel that is no longer used is used, and the waste 5 is carried into a pit 3 which is a space in the abandoned tunnel 2 and disposed. It is.
The structure 1 of this waste disposal site is mainly composed of a first coating layer 8, a second coating layer 9, and an inner buffer layer 10.

The first cover layer 8 is composed of a first cover sheet 16 that is generally composed of a first buffer layer 15 and a first water shielding layer 14.
The first buffer layer 15 is made of a first buffer sheet 18 that is a buffer material made of a long-fiber nonwoven fabric, is formed to a thickness of about 3 mm, and is formed in a substantially strip shape having a predetermined length and a predetermined width.

The first water shielding layer 14 is provided on one surface of the first buffer sheet 18 so as to be laminated on the first buffer sheet 18. The first water-impervious layer 14 is made of a water-impervious sheet 17 having a water-impervious property such as a soft synthetic resin or an elastomer. In the present embodiment, it is made of a low-density polyethylene sheet material having a thickness of about 1.5 mm, and is formed to have a length and a width that are substantially the same as those of the first buffer sheet 18.
And the 1st water shielding sheet 17 is laminated | stacked and fixed to the 1st buffer sheet | seat 18 by means, such as adhesion | attachment and welding, for example, using predetermined fixing means.

  In addition, the long-fiber nonwoven fabric and the water-impervious sheet material used as the first buffer sheet 18 and the first water-impervious sheet 17 are not bonded and fixed to each other, but in a plurality of locations such as dotted or linear. To fix each other. Moreover, as shown in FIG. 4, it has the overlap margin part 20 which is not mutually fixed by adhesion in the edge part used as a right-and-left end edge or a perimeter.

  Further, as shown in FIG. 1, an attachment piece 19 is provided on the first buffer sheet 18 that is the first buffer layer 15. A plurality of attachment pieces 19 are formed in a short strip shape, and are made of a low-density polyethylene sheet material that is the same material as the water shielding sheet 17 and has a thickness of about 1.5 mm. The attachment piece 19 is formed in a substantially fin shape in which only the base end side is fixed on the surface of the first buffer sheet 18, and is configured by a plurality, and is substantially equal to the other surface of the first buffer sheet 18. Arranged at intervals, for example, attached along the length direction of the first buffer sheet 18 and provided at predetermined intervals. Each attachment piece 19 is fixed to the first buffer sheet 18 by means such as ultrasonic welding or heat welding.

  Furthermore, the 1st water impervious sheet | seat 17 which is the 1st water impermeable layer 14 is provided with the hook_and_loop | surface fastener 21 as shown in FIG. The hook-and-loop fastener 21 is composed of a plurality of strips, is formed in a short strip shape, and can be attached to a nonwoven fabric (second buffer sheet 26) that is a second buffer layer 23 of the second covering layer 9 described later. The structure is provided with a number of hook-shaped locking pieces (not shown), that is, a male surface fastener and has a thickness of about 2 mm. These hook-and-loop fasteners 21 are arranged at substantially equal intervals on one surface of the first water-impervious sheet 17, for example, along the length direction of the first water-impervious sheet 17 as shown in FIG. 3. And are provided at predetermined intervals. Each hook-and-loop fastener 21 is fixed to the first water-impervious sheet 17 by an adhesive, or a fixing means such as ultrasonic welding or heat welding.

  Then, the first covering sheet 16 is spread on the inner surface 3 a of the tunnel 3 of the tunnel 2 so as to become the first covering layer 8. The inner surface 3a of the tunnel 2 is made of, for example, a concrete wall surface, and is stretched and fixed to the inner wall surface 3a by fixing means. As the fixing means, a nail 13 or the like is used. A belt-like support plate member 12 is used, and the mounting piece 19 is pressed through the support plate member 12 and a nail or the like is driven and fixed together with the support plate member 12.

Next, the second coating layer 9 is configured in substantially the same manner as the first coating layer 8, and a second buffer layer 23 and a second water shielding layer 22 are generally configured. It consists of a covering sheet 24.
The second buffer layer 23 is composed of a second buffer sheet 26 which is a buffer material made of a long-fiber nonwoven fabric made of substantially the same material as the first buffer layer 15. The second buffer layer 23 is formed to a thickness of about 3 mm and has a predetermined length. Now, it is formed in a substantially strip shape having a predetermined width.

  The second water shielding layer 22 is provided on one surface of the second buffer sheet 26 so as to be laminated on the second buffer sheet 26. The second water-impervious layer 22 is made of a water-impervious sheet 25 having a water-impervious property such as a soft synthetic resin or an elastomer. In the present embodiment, it is made of a low-density polyethylene sheet material having a thickness of about 1.5 mm, and is formed to have a length and a width that are substantially the same as those of the second buffer sheet 26.

  Then, a predetermined fixing means is used for the second buffer sheet 26, and the second water shielding sheet 25 is laminated and fixed by means such as adhesion or welding.

  In addition, the long-fiber nonwoven fabric and the water shielding sheet material that become the second buffer sheet 26 and the second water shielding sheet 25 are not bonded and fixed to each other like the first covering sheet 16. Are fixed at a plurality of points such as a dot shape or a line shape. Further, as shown in FIG. 4, the left and right edge portions have overlapping margin portions 28 that are not bonded and fixed to each other.

  A hook-and-loop fastener 27 is provided on the second water-impervious sheet 25 that is the second water-impervious layer 22. The hook-and-loop fastener 27 is composed of a plurality of pieces, is formed in a short strip shape, and has a hook-like locking piece (see FIG. 5) that can be attached to a nonwoven fabric (sheet cushioning material 11) that is an inner covering layer 10 described later. (Not shown), that is, a structure having male surface fasteners and having a thickness of about 2 mm. These hook-and-loop fasteners 27 are arranged at substantially equal intervals on one surface of the second water-impervious sheet 25, for example, along the length direction of the second water-impervious sheet 25 as shown in FIG. 3. And are provided at predetermined intervals. Each hook-and-loop fastener 27 is fixed to the second water-impervious sheet 25 with an adhesive, or a fixing means such as ultrasonic welding or heat welding.

  Then, the second covering sheet 24 is arranged further on the inner side of the first covering sheet 16 spread on the inner surface of the tunnel 2, and is spread on the first covering sheet 16. This spreading is achieved by secondly pressing the nonwoven fabric that is the buffer sheet 26 against the surface fastener 21 provided on the first covering sheet 16 already spread on the inner surface 3a of the tunnel 2. Done.

  Next, the inner buffer layer 10 is composed of a nonwoven fabric, a long-fiber nonwoven fabric similar to the first and second buffer layers 15 and 23 described above in the present embodiment, and is configured to have a thickness of about 3 mm. It is made of material 11. The sheet-like buffer material 11 constituting the inner buffer layer 10 covers the second coating layer 9 and constitutes the inner surface as a waste disposal site.

  The sheet-like cushioning material 11 is arranged further inside the second cover sheet 24 and spreads on the second cover sheet 24. This spreading is performed on the surface fastener 27 provided on the second covering sheet 24 which is already stretched via the first covering sheet 16 which is already spread on the inner surface 3a of the tunnel 2. That is, the non-woven fabric is press-contacted, that is, the fibers constituting the non-woven fabric and the hooked tip of the hook-and-loop fastener 27 are attached to each other.

The first covering sheet 16, the second covering sheet 24, and the sheet-like cushioning material 11 configured as described above are attached to the abandoned tunnel 2 by using a sheet stretching device or the like. This sheet expansion device is the same as the device that expands a water-impervious sheet etc. on its inner wall when constructing a new tunnel, carrying the water-impervious sheet etc. in a wound state and expanding it while rewinding it. And it is the device which fixes to the wall surface sequentially.
That is, the first covering sheet 16, the second covering sheet 24, and the sheet-like cushioning material 11 can be sequentially attached to the inner wall surface 3 a of the abandoned tunnel 1 by using a sheet expanding device. Become.

  First, the first covering sheet 16 is spread on the inner wall surface 3 a of the abandoned tunnel 2. The first cover sheet 16 is formed by laminating the first water shielding sheet 17 and the first buffer sheet 18 in advance in a factory or the like in a factory. A mounting piece 19 is attached to 18 and a hook-and-loop fastener 21 is attached to the first water shielding sheet 17 in advance. And this 1st coating sheet 16 is wound beforehand so that the attachment piece 19 may become an outer periphery, and a stretching operation | work is performed, unwinding from the state. That is, while the first covering sheet 16 is rewound so as to cover the inner surface 3 a on the tunnel 3 side of the tunnel 2, the mounting piece 19 is pressed by the support plate member 12, and the nail 13 or the like is driven together with the support plate member 12. , Fix it. As a result, the first cover sheet 16 is attached with the first buffer sheet 18 in contact with the tunnel inner surface 3a. For example, the first covering sheet 16 is extended in the circumferential direction of the tunnel, and a plurality of the first covering sheets 16 are arranged side by side in the mine for each width. The first covering sheets 16 are arranged and fixed so that the overlapping margins 20 that are side edges overlap each other. The edges that overlap each other are joined together without gaps between the first water shielding sheets 17 by heat welding or the like. Note that the edges of the first buffer sheet 18 are not joined to each other but are stacked. And the 1st coating layer 8 will be formed in the inner surface of the abolition tunnel 2 as the 1st buffer layer 15 and the 1st water shielding layer 14, and the hook_and_loop | surface fastener 21 will be in a mine inner side. It will be in the state of facing.

  Next, the second covering sheet 24 is stretched. As with the first covering sheet 16, the second covering sheet 24 is formed by laminating the above-described second water-impervious sheet 25 and the second buffer sheet 26 in advance in the factory or the like. A hook-and-loop fastener 27 is attached in advance to the second water-impervious sheet 25. And this 2nd covering sheet 24 is wound beforehand so that the 2nd shock absorbing sheet 26 may become an outer periphery, and a hook_and_loop | surface fastener 27 may become an inner periphery, and a stretching operation | work is performed, unwinding from the state. That is, the second covering sheet 24 is attached by pressing and pressing at the position of the facing surface fastener 21 while rewinding so as to cover the surface of the first covering layer 8 on the downhole 3 side. The hook-and-loop tip of the hooking piece of the hook-and-loop fastener 21 is entangled with the non-woven fiber that is the second buffer sheet 26, and is hooked. As a result, the second cover sheet 24 is attached with the second buffer sheet 26 facing the first water shielding layer 14. Similar to the first cover sheet 16, the second cover sheet 24 is provided, for example, in the circumferential direction of the tunnel, and a plurality of the second cover sheets 24 are provided in parallel in the pit 3 for each width. Each of the second covering sheets 24 is arranged and fixed so that the side edges that are the overlap allowance 28 overlap each other. The edges that overlap each other are joined without gaps between the second water-impervious sheets 25 by heat welding or the like. Note that the edges of the second buffer sheet 26 are not joined to each other but are overlapped. And the 2nd coating sheet 24 becomes the 2nd buffer layer 23 and the 2nd water shielding layer 22 inside the above-mentioned 1st coating layer 8 in the pit 3 in the 2nd coating sheet 24. In addition, the hook-and-loop fastener 27 is in the state of facing the inside of the pit.

  Next, the sheet-like cushioning material 11 is stretched. The sheet-like cushioning material 11 is a substantially strip-like member having a predetermined length and a predetermined width, and is wound in advance in the same manner as the first and second covering sheets 16 and 24, and is rewound from that state. Extension work is performed. The sheet-like cushioning material 11 is attached by pressing and pressing at the position of the facing surface fastener 27 while being rewound so as to cover the surface of the second coating layer 9 on the side of the downhole 3. As for the hook-and-loop fastener 27, the hook-shaped tip of the locking piece is entangled with the non-woven fiber that is the sheet-like cushioning material 11, and is engaged. Thereby, the sheet-like buffer material 11 faces the second water-impervious layer 22 and is attached. Like the first and second covering sheets 16 and 24, the sheet-like cushioning material 11 is, for example, extended in the circumferential direction of the tunnel, and a plurality of them are arranged in parallel in the pit 3 for each width. Is done. Moreover, it adjoins and the sheet-like cushioning material 11 is extended so that edges may overlap. Note that overlapping edges may be joined to each other. Then, the pit 3 of the abandoned tunnel 2 is covered with a sheet-like buffer material 11 and becomes an inner buffer layer 10.

  And in the abolition tunnel 2, the 1st coating layer 8, the 2nd coating layer 9, and the inner side buffer layer 10 are comprised from the inner surface, and each coating layer 8 and 9 is the water shielding layers 14, 22, Waste disposal in which the buffer layers 15 and 23 constitute the inner surface 3a as the abandoned tunnel mine 3 has a double water-impervious structure by the respective water-impervious layers 14 and 22, and the inner surface is formed by the inner buffer layer 10. It becomes place 1.

  In the first covering layer 8, the second covering layer 9, and the inner buffer layer 10 configured on the bottom surface 3 d of the mine 3, the wastes are smaller than the side surface 3 b and the ceiling surface 3 c in the mine 3. Therefore, each of the thickness of the first buffer layer 15, the thickness of the second buffer layer 23, and the thickness of the nonwoven fabric constituting the inner buffer layer 10 is configured with a thickness. It is preferable to make it. For example, in the present embodiment, the thickness of the long-fiber nonwoven fabric constituting the inner buffer layer 10 located at the uppermost part (being the innermost circumference) is approximately 10 mm, and the second buffer layer 23 serving as the intermediate position is configured. The thickness of the long-fiber nonwoven fabric is 10 mm, and the thickness of the long-fiber nonwoven fabric constituting the first buffer layer 15 located at the lowermost portion (being the outermost periphery) is 20 mm.

  Moreover, it is preferable that concrete or sand is spread on the bottom surface 3d of the pit 3 to form a road surface 31 as shown in FIG. The road surface 31 has a thickness of, for example, about 100 mm, and can easily pass a vehicle or the like that carries the waste 5 into the mine 3 and performs disposal processing and landfill work. Further, as shown in FIG. 5, a fixed frame 32 made of concrete is disposed at the corners of the bottom surface 3d formed in a substantially flat shape and the left and right side surfaces 3b to form the layers 8, 9, and 10. This prevents bending or misalignment of the sheet material to be performed.

  In the structure of the waste disposal site configured as described above, the waste is carried in from one or both of the entrances and exits of the tunnel, and the disposal work is performed by reclaiming the pit 3 as shown in FIG. In addition, at the time of this reclamation, simultaneously with the dumping of this waste, each covering layer, etc. constituting each layer 8, 9, 10 on the side surface 3b of the mine 3 is not dumped by the dumped waste, A sandbag (not shown) or the like may be placed in the corner between the bottom surface 3d and the side wall surface 3b, and the sandbags may be sequentially stacked between the side wall surface 3b together with the bulk rising due to dumping. . Also, in this landfill operation, the ceiling in the tunnel mine is not filled with waste, but as shown in FIG. 2, a space of a predetermined height from the top of the ceiling, for example, a space of about 1000 mm is left. Is preferred.

  In the structure 1 of the waste disposal site, even when tension is applied to the sheets constituting the layers 8, 9, and 10 as the amount of waste increases, the mine 3 is closed continuously from the bottom to the top. Since it has a horizontal reed-like tubular configuration, even if the tension is concentrated, there are few problems such as cracks and breaks. Therefore, there is no risk that sewage leaks to the outside.

  In addition, since the space with the ceiling 3c is used for disposal of waste, even when gas is generated, it leaks out to the surroundings compared to the conventional disposal site where waste is dumped in the recess. There is little fear and it is possible by dealing with both ends of the tunnel.

  In this way, it has become possible to effectively use the abandoned tunnel 2, which has been aging for reuse, such as backfilling or blocking the entrance and exit. It is possible to make use of it. In particular, when a tunnel is aged and a new tunnel is constructed nearby, if the excavated soil may be contaminated with harmful substances, etc. It can be used more effectively than a new recess as a disposal place.

In addition, in the structure of the waste disposal site described above, after the sheet-like cushioning material 11 is deployed, a support frame 34 that is a frame-like structure that supports each layer 8, 9, 10, etc. By providing at least in the ceiling 3c portion, it becomes possible to maintain the stretched state without bending the sheet or the like constituting each layer.
For example, as shown in FIG. 5, after each sheet material is spread and each layer 8, 9, 10 is configured, the above-described fixed frame 32 provided on the boundary between the bottom surface 3d and the side surface 3b in the mine is The end is fixed, and the support frame 34 is assembled in an arch shape in the circumferential direction in the pit, and supports each layer. The support frame 34 is formed of, for example, a pipe-shaped member, and is arranged and configured at substantially equal intervals, for example, every 1000 mm in the tunnel length direction. Although not shown, a hook-like member that supports the support frame 34 substantially vertically from the bottom surface 3d may be erected and arranged near the approximate center of the pit.

  Further, in the above-described embodiment, as shown in FIG. 2, the first covering layer 8, the second covering layer 9, and the inner buffer layer 10 are provided on the entire inner circumferential surface of the tunnel well 3, and the entire inner surface is provided. Although described as an example of constructing a double water-impervious structure, as shown in FIG. 6, a structure in which the inner buffer layer 10 is not provided in the vicinity of the ceiling 3 c in the pit 3 may be used. That is, by working without filling the waste 5 until reaching the ceiling 3c, the waste 5 does not come into contact with the ceiling 3c portion, and damage or the like is unlikely to occur. Can be omitted, thereby making it possible to reduce material costs.

  Moreover, in embodiment mentioned above, although the buffer sheet which comprises each layer of the 1st buffer layer 15, the 2nd buffer layer 23, and the inner side buffer layer 10 was described as an example comprised with the long-fiber nonwoven fabric, these each layer was described. The non-woven fabric constituting may be composed of a short-fiber non-woven fabric.

  Furthermore, in embodiment mentioned above, the surface fastener 21 of the 1st coating layer 8 is provided in the 1st water-impervious sheet 17 along a longitudinal direction, and the surface fastener 27 of the 2nd coating layer 9 is longitudinally arranged. As a structure provided in the 2nd water-impervious sheet 25 along a direction, it was set as the structure fixedly attached to the buffer sheet 26 and the buffer material 11 which consist of an opposing nonwoven fabric, but the buffer sheet 26 which opposes each hook-and-loop fastener 21,27. As shown in FIG. 7 (b), the other surface fastener 37 may be disposed on the sheet cushioning material 11 so as to be engaged with the surface fasteners 21 and 27. That is, the other hook-and-loop fastener 37 is constituted by, for example, a so-called female hook-and-loop fastener having a loop-shaped portion which is engaged with the hook-and-loop fasteners 21 and 27 having hook-shaped tips, and is formed in a strip-like shape. It forms, and it is set as the structure arrange | positioned and provided so that it may orthogonally cross with the longitudinal direction (refer Fig.7 (a)) of one surface fastener 21,27. In the other hook-and-loop fastener 37, the parts to be attached are the cushioning sheet 26 and the cushioning material 11 made of non-woven fabric, and the attaching means is fixed by sewing or the like. In addition, as shown to Fig.7 (a), one hook_and_loop | surface fastener 21 (27) does not need to be provided over the longitudinal direction of the water shielding sheet 17 (25), and should just be arrange | positioned in the approximate center part. By setting it as such a structure, each strip | belt-shaped surface fastener 21 and 37 (27, 37) will mutually cross | intersect, and each will be engaged, and joining in several places is attained. According to this configuration, when the buffer sheet is formed of the above-described short fiber nonwoven fabric, it is possible to eliminate the difficulty in engaging the hook-and-loop surface fasteners 21 and 27.

  Further, in the above-described embodiment, the example in which the attachment piece 19 is provided on the first covering sheet 16 to be the first covering layer 8 and is fixed to the inner wall of the tunnel is shown. As the means for attaching the sheet 16, other means may be used. For example, the edge of the first cushioning sheet 18 is fixed to the inner wall of the tunnel with a nail or the like at the position of the overlap allowance 20 (see FIG. 4). It is good as a method.

  Furthermore, in each of the above-described embodiments, the tunnel for disposing of the waste has been described as an example of using the abandoned tunnel that is no longer used. However, a newly excavated tunnel is configured as a disposal site. Of course, you may. For example, the double water-impervious structure described above is also used when a new tunnel or the like formed by excavating a shaft in the ground and excavating a horizontal shaft in a substantially horizontal direction to the shaft is used as a waste disposal site. With the configuration, it is possible to obtain the same effect as described above, and it is possible to provide a disposal facility in the ground.

It is sectional drawing which shows one Embodiment of the structure of the waste disposal site by this invention. It is a schematic front view of the structure of the waste disposal site. It is a schematic plan view of the 1st water shielding sheet used as a 1st water shielding layer. It is an exploded sectional view of the structure of the waste disposal site. It is a schematic perspective view which shows the example which provided the support frame in the mine. It is a schematic front view which shows other embodiment. It is the figure which showed the schematic top view of the water-impervious sheet | seat which shows other embodiment in (a), and the schematic bottom view in (b).

Explanation of symbols

2 ... Tunnel (Abandoned Tunnel)
DESCRIPTION OF SYMBOLS 3 ... Tunnel 8 ... 1st coating layer 9 ... 2nd coating layer 10 ... Inner buffer layer 14 ... 1st water shielding layer 15 ... 1st buffer layer 21, 27 ... Hook fastener 22 ... 2nd water shielding Layer 23 ... Second buffer layer 31 ... Road surface 34 ... Support frame 37 ... Female surface fastener

Claims (6)

It is a structure of a waste disposal site using a tunnel,
A first covering layer spread and fixed on the inner surface of the tunnel;
A second coating layer that covers and spreads the inner surface of the first coating layer;
An inner buffer layer made of a nonwoven fabric covering the second coating layer and constituting the inner surface of the well;
Comprising
The first covering layer includes a first buffer layer made of a non-woven fabric placed in contact with the inner surface of the tunnel and attached to the inner surface of the tunnel, and a water shielding sheet material formed on the first buffer layer. And a hook-and-loop fastener having a male engagement piece is provided.
The second covering layer is made of a non-woven fabric that can be engaged with the surface fastener, and includes a second buffer layer that covers the first covering layer, and a water shielding sheet material that is laminated on the second buffer layer. A hook-and-loop fastener having a male engagement piece to be engaged with the non-woven fabric constituting the inner buffer layer is provided.
A double water-impervious structure is constituted by the first water-impervious layer and the second water-impervious layer sandwiching the second buffer layer, and the inner space of the tunnel is formed by the inner buffer layer. Structure of a waste disposal site, characterized in that waste is landfilled. It is a structure of a waste disposal site using a tunnel,
A first covering layer spread and fixed on the inner surface of the tunnel;
A second coating layer that covers and spreads the inner surface of the first coating layer;
An inner buffer layer made of a nonwoven fabric covering the second coating layer and constituting the inner surface of the well;
Comprising
The first covering layer includes a first buffer layer made of a nonwoven fabric that has an attachment piece fixed to the inner surface of the tunnel and is disposed in contact with the inner surface of the tunnel and is attached to the inner surface of the tunnel; A surface fastener having a male side engaging piece is provided with a first water shielding layer made of a water shielding sheet material laminated on the buffer layer,
The second covering layer is made of a non-woven fabric that can be engaged with the surface fastener, and includes a second buffer layer that covers the first covering layer, and a water shielding sheet material that is laminated on the second buffer layer. A hook-and-loop fastener having a male engagement piece to be engaged with the non-woven fabric constituting the inner buffer layer is provided.
A double water-impervious structure is constituted by the first water-impervious layer and the second water-impervious layer sandwiching the second buffer layer, and the inner space is formed in the inner space of the tunnel. Structure of a waste disposal site, characterized in that waste is landfilled.   A support frame that supports each layer together with the first coating layer and the second coating layer in contact with at least the inner buffer layer located at the ceiling portion in the mine is provided in the mine. Item 1. Waste disposal site structure according to item 1 or 2.   The first coating layer and / or the second coating layer is composed of a water-impervious sheet and a non-woven fabric formed in a strip shape having a predetermined length and a predetermined width, and the edge of the water-impervious sheet in each layer The structure of a waste disposal site according to claim 1, 2 or 3, wherein each layer is formed by joining a portion with an edge portion of an adjacent water-impervious sheet to cover each inner surface of the tunnel.   Among the buffer layers made of nonwoven fabric constituting each of the layers, at least the second buffer layer of the second covering layer is provided with female surface fasteners that are engaged with the facing surface fasteners. The structure of the waste disposal site according to any one of claims 1, 2, 3, and 4.   The bottom surface of the pit covered with the inner buffer layer is covered with concrete and / or sand to form a road surface, according to any one of claims 1, 2, 3, 4, and 5. Structure of the waste disposal site described.

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