JP3197742U - Waste disposal facility - Google Patents

Abstract

[PROBLEMS] To provide a waste disposal facility having a simple structure, a short construction period, low cost, and even when the water shielding sheet is not peeled or cracked, water shielding is maintained, and reliability is high. SOLUTION: At least a vertical wall portion of a PCa (precast concrete) block 1 is attached with a sheet fixture 6 provided with a heat welding material on the surface, and a plurality of PCa blocks 1 with the sheet fixture 6 inside the surrounding wall 18. The wall 18 is formed by being arranged side by side on the bottom surface of the recess, and the water shielding sheet 12 is welded and fixed to the heat welding material of the sheet fixture 6 and laid on the vertical and bottom surfaces in the wall 18. The upper end opening of the surrounding wall 18 is covered with a lid, and the upper part of the waste disposal facility is used as a part of the ground 15 on the site. [Selection] Figure 3

Description

  The present invention relates to a waste disposal facility.

  The 2011 off the Pacific coast of Tohoku Earthquake and the accompanying tsunami caused unprecedented damage, such as killing a large number of lives, destroying a large number of houses and damaging nuclear power generation facilities. . One of the problems that occurs immediately after such a catastrophe is the handling of rubble that has occurred in large quantities. For combustible debris, it is desirable to incinerate and discard the incineration ash and incineration residue to a waste disposal site. However, when a large amount of debris is generated, a large amount of incineration ash and incineration residue is generated, so it is necessary to quickly construct a large number of waste disposal sites with a large capacity. For this purpose, there is a need for a waste disposal site that has a simple structure, a short construction period, low cost, and yet maintains a water-blocking property so that sewage is not leaked and is highly reliable.

  Conventional waste disposal sites with a simple structure are often constructed by digging a recess in the land of the site and laying a water shielding sheet on the inner surface of the recess.

  In Patent Document 1, the water-impervious layer built on the bottom and side slopes of the disposal site has a multi-layer structure of bentonite mixed soil layer and water-impervious sheet, and the bentonite mixed soil layer at the bottom is made of bentonite mixed soil. Disclosed is a waste disposal site that is constructed by rolling and forming a bentonite mixed soil layer on the slope by spraying or laminating compressed blocks of bentonite mixed soil, and laying a water shielding sheet on the bentonite mixed soil layer. ing. According to this waste disposal site, the water shielding function can be enhanced by the bentonite mixed soil layer and the water shielding sheet. However, it takes a lot of equipment and labor to lay the bentonite mixed soil layer, and the water shielding sheet is peeled off from the bentonite mixed soil layer, and the bentonite mixed soil layer and the water shielding sheet that are not so strong are cracked by aftershocks. In other words, there is a problem that the water shielding property may be cut.

  In Patent Document 2, a mold frame in which a water-impervious sheet with projections is fixed on the entire surface of a concave surface for dumping waste having a slope and a bottom surface is arranged with a gap between the concave surface and the concave surface. A waste disposal site is disclosed in which concrete is placed between a water-impervious sheet and cured as it is for a certain period of time to harden the concrete, and after curing, the mold is removed to construct. According to this waste disposal site, it is possible to construct a disposal site with a concave surface covered with a water shielding sheet in a state where there is no gap, and the separation of the water shielding sheet with protrusions can be prevented, and the strength can be increased with concrete. It is possible to maintain the water shielding property. However, there is a problem that it takes much time and facilities for placing the formwork and placing concrete on the site, and it takes time to cure the concrete. Further, the water shielding sheet with protrusions is expensive.

JP-A-10-76238 JP 2002-59104 A

  The problem to be solved by the present invention is that the structure is simple, the construction period is short, the cost is low, and even if the sheet is not peeled or cracked, the water shielding is maintained and the waste is highly reliable. It is to provide a disposal facility so that it can meet the demand to quickly build a large number of large-capacity waste disposal facilities.

  In the waste disposal facility of the present invention, a sheet fixture having a heat-welding material is attached to at least a vertical wall portion of a precast concrete block including a base plate portion and a vertical wall portion standing upright from the base plate portion. A plurality of precast concrete blocks are installed side by side on the installation surface with the sheet fixture inside, and the water shielding sheet is welded and fixed to the heat welding material of the sheet fixture. It is characterized by being laid on the vertical and bottom surfaces.

  As a method for constructing this waste disposal facility, a sheet fixture having a surface with a heat welding material on at least a vertical wall portion of a precast concrete block including a base plate portion and a vertical wall portion erected from the base plate portion is provided. Mounting and fixing a plurality of precast concrete blocks by arranging them on the installation surface side by side with the sheet fixture inside the wall, and fixing the water shielding sheet by electromagnetic induction heating performed through the water shielding sheet A method of welding and fixing to the heat welding material of the tool and laying it on the vertical and bottom surfaces in the surrounding wall will be given.

  Here, examples of the precast concrete block (hereinafter referred to as “PCa block”) include a block manufactured exclusively for this facility, an existing retaining wall block, and the like. The shape of the PCa block is an L shape including a base plate portion and a vertical wall portion erected from the front end portion of the base plate portion, and a vertical wall erected from a middle portion in the front-rear direction of the base plate portion and the base plate portion. An inverted T-type including a part can be exemplified. In the case of the L type, it is preferable that the base plate is installed on the installation surface so as to be inside the surrounding wall.

  In addition to the vertical wall portion of the PCa block, the sheet fixture provided with a heat welding material on the surface can be attached to the upper side of the base plate portion. The sheet fixing tool further prevents displacement and peeling of the water shielding sheet.

  The installation surface on which the PCa block is installed may be the ground on the site, but is preferably the bottom surface of a recess dug in the ground on the site so that the surrounding wall can be stored under the ground. In the latter case, it is preferable to cover the upper end opening of the surrounding wall with a lid. This is because the upper part of the waste disposal facility can be used as a part of the ground on the site. As the lid, a precast / prestressed concrete board (hereinafter referred to as “PCa / PC board”) is preferable in that a long-span thing can be made.

  According to the present invention, the structure is simple, the construction period is short, the cost is low, and even if it does not cause peeling or cracking of the water shielding sheet, the water shielding is maintained and a highly reliable waste disposal facility is provided. Therefore, it has an excellent effect of being able to respond to a request for quickly building a large number of waste disposal facilities with a large capacity.

(A) is a perspective view of the PCa block used for the linear part of the surrounding wall in the waste disposal facility of the embodiment, (b) is a perspective view of the PCa block used for the corner part, and (c) is a view of these PCa blocks. It is principal part sectional drawing. (A) is a perspective view which shows the recessed part formation in the construction method of the waste disposal facility, and the installation middle of PCa block, (b) is a perspective view which shows the state in which the installation was completed and the surrounding wall was formed. (A) is a perspective view which shows the state in which the bottom plate of the surrounding wall was formed, (b) is a perspective view which shows the middle of laying a water-proof sheet | seat on the vertical surface and bottom face in an enclosed wall. (A) is a perspective view which shows the method of welding fixation of the water-impervious sheet, and (b) is a cross-sectional view. (A) is a perspective view which shows the middle of dumping wastes, such as incineration ash, in an enclosed wall, (b) is a perspective view which shows the middle which covers the upper end opening of an enclosed wall with a cover body. It is a perspective view which shows the state which backfilled the soil above the waste disposal facility. It is a perspective view of another example of a PCa block.

  The waste disposal facility includes a sheet fixture having a surface with a thermal welding material 8 on at least the vertical wall portion 3 of the PCa block 1 including the base plate portion 2 and the vertical wall portion 3 erected from the base plate portion 2. 6 is attached, and a plurality of PCa blocks 1 are installed side by side on the installation surface with the sheet fixture 6 inside the enclosure 18, so that the enclosure 18 is formed, and the water shielding sheet 12 is used as a heat welding material for the sheet fixture 6. 8 is welded and fixed to the vertical and bottom surfaces of the surrounding wall 18. The installation surface is the bottom surface 17 of the recess 16 dug in the ground 15 at the site, and the surrounding wall 18 is stored under the ground 15. The upper end opening of the surrounding wall 18 is covered with a lid, and the upper part of the waste disposal facility is used as a part of the ground 15 on the site.

  An embodiment of a waste disposal facility embodying the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the PCa block 1 used in this embodiment is a block manufactured exclusively for this facility including a base plate portion 2 and a vertical wall portion 3 erected from the front end portion of the base plate portion 2. is there. FIG. 1A shows a two-sided L-type PCa block 1 used for a straight portion of the surrounding wall 18 in the waste disposal facility 14, and FIG. 1B shows a three-sided L-type PCa block 1 also used for a corner portion. A reinforcing bar is embedded in the PCa block 1, and a protruding reinforcing bar 4 is provided by a part of the reinforcing bar in the base plate part 2 protruding from the rear end surface of the base plate part 2. On the upper end surface of the vertical wall portion 3, a concave step portion 5 for fitting a lid, which will be described later, is formed.

  Further, an anchor 9 made of, for example, an internal thread is embedded in a key point including at least the upper part of the vertical wall part 3 (in the illustrated example, each of the upper part, the intermediate part, and the lower part). A sheet fixture 6 including the attached heat welding material 8 is fixed by, for example, a bolt 10. As the sheet fixture 6, for example, trade name “IH disk” manufactured by Akiyamade can be used.

  The base plate part 2 and the vertical wall part 3 are fixed with connecting metal fittings for connecting and fixing to the base plate part 2 and the vertical wall part 3 of the PCa block 1 installed next to each other. The connecting metal fitting is, for example, a plate with a hole. In that case, the connecting metal fitting is connected and fixed to a hole of the adjacent connecting metal fitting 11 through a bolt (not shown).

  The waste disposal facility of this embodiment uses the installation surface of the PCa block 1 as the bottom surface 17 of the recess 16 dug in the ground 15 on the site, and stores the surrounding wall 18 under the ground 15. A plurality of PCa blocks 1 are installed side by side on the installation surface with the sheet fixture 6 inside the enclosure 18, so that the enclosure wall 18 is formed, and the water shielding sheet 12 is welded and fixed to the heat welding material 8 of the sheet fixture 6. Thus, it is laid on the vertical surface and bottom surface, which are the entire surface of the surrounding wall 18. The upper end opening of the surrounding wall 18 (after dumping the waste 22) is covered with a plurality of PCa / PC plates 23 as a lid, and soil 24 is backfilled above the surrounding wall 18 and the lid, and further, such as grass A greening layer 25 is laid, and the upper part of the waste disposal facility 14 can be used as a part of the ground on the site.

The waste disposal facility 14 of this embodiment is constructed by a method comprising the following steps.
(1) As shown in FIG. 2A, a recess 16 is formed by digging the ground 15 at the site.
(2) As shown in FIGS. 2 (a) and 2 (b), a plurality of PCa blocks 1 are installed side by side on the installation surface with the seat fixture 6 inside the surrounding wall 18 on the bottom surface 17 of the recess 16 as the installation surface. Thus, the surrounding wall 18 is formed. In addition, the crushed stone may be spread on the installation surface, foundation concrete may be placed thereon, and the PCa block 1 may be installed thereon. The PCa blocks 1 are connected and fixed together using the connecting metal fitting 11. In this embodiment, the water shielding sheet 12 takes charge of water shielding, but the end surfaces of the PCa blocks 1 may be further sealed with mortar, a sealing material or the like.

(3) As shown in FIG. 3 (a), the bottom slab concrete 20 is placed so that the protruding reinforcing bars 4 are embedded on the bottom surface 17 of the recess 16 surrounded by the base plate portion 2 of the PCa block 1. . Instead of placing the bottom slab concrete 20, soil may be buried on the bottom surface 17, or a PCa bottom slab may be laid.
(4) As shown in FIGS. 3B and 4A and 4B, electromagnetic induction performed by pressing the water shielding sheet 12 with the high frequency electromagnetic induction heater 21 through the water shielding sheet 12 for a predetermined time. It is welded and fixed to the heat welding material 8 of the sheet fixture 6 that has been melted by heating, and is laid on the vertical and bottom surfaces, which are the entire surface of the surrounding wall 18. The water shielding sheets 12 are laid in a watertight manner by welding overlapping portions.

(5) As shown in FIG. 5A, waste 22 such as incineration ash and incineration residue from which debris is incinerated is dumped in the surrounding wall 18.
(6) As shown in FIG. 5 (b), the upper end opening of the surrounding wall 18 is covered with a plurality of PCa / PC plates 23 as lids, and the plate end portions are fitted into the recessed step portions 5.
(7) As shown in FIG. 6, the soil 24 is backfilled above the surrounding wall 18 and the lid, and a greening layer 25 such as turf is further laid, and the upper part of the waste disposal facility 14 is made a part of the ground on the site. Make it available.

According to the present embodiment described above, the following operational effects can be obtained.
(A) Since the PCa block 1 is used, on-site facilities and labor are not required, early construction is possible, and costs are low. The construction period can be further shortened when soil is buried on the bottom surface 17 or a PCa bottom slab is laid instead of placing the bottom concrete 20.
(B) Since the surrounding wall 18 is constructed with the PCa block 1, the strength of the waste disposal facility 14 is high, and even if there is an aftershock or the like, the water-impervious sheet 12 is hardly cracked, and the water-imperviousness is maintained.
(C) Since the water shielding sheet 12 is welded and fixed to the heat welding material 8 of the sheet fixture 6, the water shielding sheet 12 is not displaced or peeled off even if there is an aftershock or the like. Maintained and reliable. Therefore, leakage of sewage can be prevented.
(D) By using the PCa / PC plate 23 that can handle a long span as the lid, a sufficient internal capacity of the surrounding wall 18 can be secured.

In addition, this invention is not limited to the structure of the said embodiment, For example, as follows, it can also be changed and embodied suitably in the range which does not deviate from the meaning of invention.
(1) Use an off-the-shelf L-type retaining wall block as the PCa block 1 as shown in FIG.
(2) Laying the waterproof sheet 12 in double. Improves the reliability of water shielding.
(3) Disposing of the incineration ash and waste other than the incineration residue, for example, radioactively contaminated water, into the surrounding wall 18.

DESCRIPTION OF SYMBOLS 1 PCa block 2 Base part 3 Vertical wall part 4 Reinforcing bar 5 Reinforced step part 6 Sheet fixture 7 Metal disk 8 Heat welding material 9 Anchor 10 Bolt 11 Connecting metal fittings 12 Water shielding sheet 14 Waste disposal facility 15 Ground 16 Concave Place 17 Bottom 18 Enclosure 20 Bottom slab concrete 21 High frequency electromagnetic induction heater 22 Waste 23 PCa / PC board as lid 24 Earth 25 Greening layer

Claims (8)

  At least a vertical wall portion of a precast concrete block including a base plate portion and a vertical wall portion erected from the base plate portion is attached with a sheet fixture having a heat welding material on the surface, and a plurality of precast concrete blocks are seated. The wall is formed by installing the fixtures on the installation surface side by side, and the water shielding sheet is welded and fixed to the heat welding material of the sheet fixture, and is laid on the vertical and bottom surfaces of the wall. Waste disposal facility characterized by   The waste disposal facility according to claim 1, wherein the installation surface on which the PCa block is installed is a bottom surface of a recess dug in the ground of the site so that the surrounding wall can be stored under the ground.   The waste disposal facility according to claim 2, wherein the upper end opening of the surrounding wall is covered with a lid.   The waste disposal facility according to claim 3, wherein the lid is a plurality of precast / prestressed concrete plates.   The precast concrete block is an L-shaped block including a base plate portion and a vertical wall portion erected from the front end of the base plate portion, and a two-sided L-type block is used for the straight portion of the surrounding wall. The waste disposal facility according to any one of claims 1 to 4, wherein a three-sided L-shaped block is used for a corner portion.   The waste disposal facility according to any one of claims 1 to 5, wherein bottom slab concrete is placed on the bottom surface of the recess surrounded by the base plate portion.   The waste disposal facility according to any one of claims 1 to 5, wherein soil is buried on the bottom surface of the recess surrounded by the base plate portion.   The waste disposal facility according to any one of claims 1 to 5, wherein a precast concrete bottom plate is laid on the bottom surface of the recess surrounded by the base plate portion.

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