JP2017100054A - Closing method of storage part in final disposal site of waste and final disposal site of waste - Google Patents
Closing method of storage part in final disposal site of waste and final disposal site of waste Download PDFInfo
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- JP2017100054A JP2017100054A JP2015233089A JP2015233089A JP2017100054A JP 2017100054 A JP2017100054 A JP 2017100054A JP 2015233089 A JP2015233089 A JP 2015233089A JP 2015233089 A JP2015233089 A JP 2015233089A JP 2017100054 A JP2017100054 A JP 2017100054A
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- 239000002699 waste material Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000007906 compression Methods 0.000 claims abstract description 66
- 230000006835 compression Effects 0.000 claims abstract description 61
- 239000002689 soil Substances 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 230000035699 permeability Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000007654 immersion Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 3
- 239000008239 natural water Substances 0.000 description 3
- 239000010791 domestic waste Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
Abstract
Description
本発明は、廃棄物の最終処分場における収容部の閉塞方法、及び、廃棄物の最終処分場に関する。 The present invention relates to a method for closing a container in a final disposal site for waste and a final disposal site for waste.
事業活動によって排出される産業廃棄物や、一般家庭から排出される生活廃棄物の最終処分として、埋立処分が行われている。このような廃棄物の埋め立て処分を行う最終処分場としては、廃棄物を収容する収容空間を形成する凹状の収容部を備えるものが知られている（特許文献１参照）。該収容部は、収容空間と連通する開口部を備えており、該開口部から収容空間に廃棄物を搬入可能に構成されている。 Landfill disposal is performed as the final disposal of industrial waste discharged from business activities and domestic waste discharged from ordinary households. As a final disposal site that performs such landfill disposal of waste, one having a concave storage portion that forms a storage space for storing waste is known (see Patent Document 1). The housing portion includes an opening communicating with the housing space, and is configured to be able to carry waste into the housing space from the opening.
そして、斯かる最終処分場では、所定量の廃棄物が収容部に収容されると、収容部の開口部を覆うように所定厚みの覆土を設けることで、開口部が閉塞される。これにより、斯かる最終処分場での廃棄物の処理が終了する（最終処分場が閉鎖される）ことになる。 In such a final disposal site, when a predetermined amount of waste is stored in the storage unit, the opening is closed by providing a cover with a predetermined thickness so as to cover the opening of the storage unit. As a result, the processing of the waste at the final disposal site is completed (the final disposal site is closed).
ところで、最終処分場が閉鎖された状態であっても、収容部の内側から外側へ水の浸出が生じる場合がある。斯かる場合には、浸出した水（以下では、浸出水とも記す）は、最終処分場に隣接設置された水処理設備で処理された後、公共水域などに放流されることになる。このため、浸出水の水量が多くなるほど、水処理設備にかかる負荷が増加し、水処理費用が嵩むことになるため、浸出水の水量を少なくすることが要求されている。 By the way, even if the final disposal site is closed, water may be leached from the inside to the outside of the housing portion. In such a case, the leached water (hereinafter also referred to as leached water) is treated by a water treatment facility installed adjacent to the final disposal site, and then discharged into a public water area or the like. For this reason, as the amount of leachate increases, the load on the water treatment facility increases and the cost of water treatment increases, so that the amount of leachate is required to be reduced.
上記のような浸出水は、収容部内の廃棄物が保有していた水分だけでなく、覆土を透過して収容部内に侵入した雨水に起因して水量が増加する。このため、収容部内への雨水の浸入を防止するべく、遮水シートで覆土を覆う方法が提案されている（特許文献２参照）。 The amount of water in the leachate as described above is increased not only due to the water retained by the waste in the accommodating part, but also due to rainwater that has penetrated the cover soil and entered the accommodating part. For this reason, in order to prevent the intrusion of rainwater into the housing portion, a method of covering the cover soil with a water shielding sheet has been proposed (see Patent Document 2).
しかしながら、上記のような方法では、遮水シート自体の価格が比較的高額であるため、より安価な材料を用いた方法が要求されている。また、上記のような遮水シートは、敷設される際に加わる外力や経時的な劣化によって破損する虞があるため、収容部を閉塞した後においても遮水シートの破損箇所から収容部へ雨水が浸入する虞がある。 However, in the above method, since the price of the water shielding sheet itself is relatively high, a method using a cheaper material is required. In addition, since the above-described water-impervious sheet may be damaged due to external force applied when it is laid or deterioration over time, rainwater from the damaged part of the water-impervious sheet to the accommodating part even after the accommodating part is closed. May invade.
そこで、本発明は、廃棄物の最終処分場において、より安価に収容部の閉塞を行うことができると共に、閉塞後の収容部への雨水の浸入を効果的に防止することができる収容部の閉塞方法を提供すること、及び、その方法を用いて収容部が閉塞された最終処分場を提供することを課題とする。 Accordingly, the present invention provides a storage unit capable of closing the storage unit at a lower cost at the final disposal site for waste and effectively preventing rainwater from entering the storage unit after the closure. It is an object of the present invention to provide a closing method and to provide a final disposal site in which a container is closed using the method.
本発明に係る廃棄物の最終処分場における収容部の閉塞方法は、廃棄物を収容する収容空間を形成するように凹状に形成されると共に該収容空間と連通する開口部を有する収容部を備えた廃棄物の最終処分場における収容部の閉塞方法であって、ローム層から採取したローム土が圧縮されてなる圧縮層で前記開口部の少なくとも一部を覆うことを特徴とする。 A method for closing a storage unit in a final disposal site for waste according to the present invention includes a storage unit that is formed in a concave shape so as to form a storage space for storing waste and has an opening that communicates with the storage space. A method for closing a container in a final disposal site for waste, wherein at least a part of the opening is covered with a compressed layer formed by compressing loam soil collected from a loam layer.
前記開口部の少なくとも一部を覆うように前記ローム土を敷き詰める敷き詰め工程と、該敷き詰め工程で敷き詰められたローム土を圧縮して圧縮層を形成する圧縮工程とを備えることが好ましい。 It is preferable to include a laying process in which the loam soil is spread so as to cover at least a part of the opening, and a compression process in which the loam soil laid in the laying process is compressed to form a compression layer.
斯かる構成によれば、ローム層から採取したローム土が圧縮されてなる圧縮層で前記開口部の少なくとも一部を覆うことで、収容部の閉塞を比較的安価で行うことができると共に、閉塞された収容部への雨水の浸入を効果的に防止することができる。
具体的には、ローム層は、日本国内の地盤に広く存在するものであるため、該ローム層から採取されるローム土は、比較的安価に入手することが可能である。このようなローム土を用いて収容部を閉塞することで、比較的安価に収容部の閉塞を行うことが可能となる。
According to such a configuration, the at least part of the opening is covered with a compressed layer formed by compressing loam soil collected from the loam layer, so that the housing portion can be closed at a relatively low cost. It is possible to effectively prevent rainwater from entering the storage section.
Specifically, since the loam layer is widely present in the ground in Japan, the loam soil collected from the loam layer can be obtained at a relatively low cost. By closing the storage unit using such loam soil, the storage unit can be closed relatively inexpensively.
また、ローム土は、圧縮することによって透水係数が小さくなるため、ローム土が圧縮されてなる圧縮層は、従来から一般的な覆土として用いられている土よりも透水性が低いものになる。これにより、ローム土が圧縮されてなる圧縮層を用いて収容部を閉塞することで、圧縮層に接触した雨水が圧縮層を透過するのを効果的に防止することができるため、閉塞された収容部への雨水の浸入を効果的に防止することができる。 In addition, since the loam soil has a low water permeability coefficient by being compressed, the compressed layer formed by compressing the loam soil has a lower water permeability than the soil conventionally used as a general cover soil. Thus, the container is closed using a compressed layer formed by compressing loam soil, so that rainwater in contact with the compressed layer can be effectively prevented from passing through the compressed layer. It is possible to effectively prevent rainwater from entering the housing portion.
また、ローム土は、圧縮された状態であっても、変形可能な柔軟性を有する。このため、圧縮層の下の廃棄物の層が経時的な変化によって部分的に陥没するなどして変形した際にも、斯かる変形に追従して圧縮層が変形することになるため、圧縮層に亀裂や破断等の破損が生じるのを抑制することができる。これにより、閉塞された収容部へ圧縮層の破損箇所を通じて雨水が浸入するのを効果的に防止することができる。 In addition, loam soil has a deformable flexibility even in a compressed state. For this reason, even when the waste layer under the compression layer is deformed due to partial depression due to changes over time, the compression layer is deformed following the deformation. It is possible to suppress breakage such as cracks and breaks in the layer. Thereby, it can prevent effectively that rainwater penetrate | invades into the obstruct | occluded accommodating part through the broken location of a compression layer.
透水係数が１×１０−５ｃｍ／秒以下となるようにローム土を圧縮して圧縮層を形成することが好ましい。 The loam soil is preferably compressed to form a compressed layer so that the water permeability is 1 × 10 −5 cm / second or less.
斯かる構成によれば、透水係数が上記の範囲となるようにローム土を圧縮して圧縮層を形成することで、雨水が圧縮層を透過するのを効果的に防止することができるため、圧縮層で閉塞された収容部への雨水の侵入をより効果的に防止することができる。 According to such a configuration, it is possible to effectively prevent rainwater from passing through the compressed layer by compressing the loam soil so that the water permeability coefficient is in the above range and forming the compressed layer. It is possible to more effectively prevent rainwater from entering the housing portion closed by the compression layer.
前記圧縮層は、前記開口部と重なる領域の内側から外側に向かって高さが低くなるように傾斜した傾斜部を備えるように形成されることが好ましい。 The compression layer is preferably formed to include an inclined portion that is inclined so that the height decreases from the inside to the outside of the region overlapping the opening.
斯かる構成によれば、傾斜部を備えるように圧縮層を形成することで、圧縮層上の雨水は、傾斜部上を流れて開口部の外側へ流出することになる。これにより、圧縮層で閉塞された収容部へ開口部側から雨水が浸入するのをより効果的に防止することができる。 According to such a configuration, by forming the compression layer so as to include the inclined portion, rainwater on the compressed layer flows on the inclined portion and flows out of the opening. Thereby, it can prevent more effectively that rainwater penetrate | invades into the accommodating part obstruct | occluded with the compression layer from the opening part side.
前記圧縮層における前記開口部と重なる領域の外側へ圧縮層上の水を排水する排水設備を圧縮層上に設けることが好ましい。 It is preferable to provide a drainage facility on the compression layer for draining water on the compression layer to the outside of the region of the compression layer overlapping the opening.
斯かる構成によれば、前記圧縮層における前記開口部と重なる領域の外側へ圧縮層上の水を排水する排水設備を圧縮層上に設けることで、圧縮層上の雨水は、排水設備によって開口部の外側へ排水されることになる。これにより、圧縮層で閉塞された収容部へ開口部側から雨水が浸入するのをより効果的に防止することができる。 According to such a configuration, the rainwater on the compression layer is opened by the drainage facility by providing the drainage facility on the compression layer for draining the water on the compression layer to the outside of the region overlapping the opening in the compression layer. It will be drained to the outside of the section. Thereby, it can prevent more effectively that rainwater penetrate | invades into the accommodating part obstruct | occluded with the compression layer from the opening part side.
前記圧縮層を覆うように盛り土を行って盛土層を形成することが好ましい。 It is preferable to form an embankment layer by embedding so as to cover the compressed layer.
斯かる構成によれば、前記圧縮層を覆うように盛土層を形成することで、収容部への雨水の浸入を圧縮層と盛土層とによってより効果的に防止することができる。 According to such a configuration, by forming the embankment layer so as to cover the compression layer, it is possible to more effectively prevent the intrusion of rainwater into the accommodating portion by the compression layer and the embankment layer.
本発明に係る廃棄物の最終処分場は、廃棄物を収容する収容空間を形成するように凹状に形成されると共に該収容空間と連通する開口部を有する収容部を備えた廃棄物の最終処分場であって、ローム層から採取したローム土が圧縮されて形成されると共に前記開口部の少なくとも一部を覆うように形成された圧縮層を備えることを特徴とする。 The final disposal site for waste according to the present invention is formed in a concave shape so as to form a storage space for storing waste, and the final disposal of waste having a storage portion having an opening communicating with the storage space It is a field, It is characterized by including the compression layer formed so that the loam soil extract | collected from the loam layer may be compressed and may cover at least one part of the said opening part.
前記圧縮層は、透水係数が１×１０−５ｃｍ／秒以下であることが好ましい。 The compressed layer preferably has a water permeability of 1 × 10 −5 cm / second or less.
前記圧縮層は、前記開口部と重なる領域の内側から外側に向かって高さが低くなるように傾斜した傾斜部を備えることが好ましい。 It is preferable that the compression layer includes an inclined portion that is inclined so that the height decreases from the inside to the outside of the region overlapping the opening.
前記圧縮層における前記開口部と重なる領域の外側へ圧縮層上の水を排水する排水設備を圧縮層上に更に備えることが好ましい。 It is preferable that the compressed layer further includes a drainage facility for draining water on the compressed layer to the outside of the region of the compressed layer that overlaps the opening.
以上のように、本発明によれば、廃棄物の最終処分場において、より安価に収容部の閉塞を行うことができると共に、閉塞後の収容部への雨水の浸入を効果的に防止することができる。 As described above, according to the present invention, the storage unit can be closed at a lower cost in the final disposal site of waste, and rainwater can be effectively prevented from entering the storage unit after the closure. Can do.
以下、本発明の実施形態について図１を参照しながら説明する。なお、以下の図面において同一または相当する部分には同一の参照符号を付しその説明は繰り返さない。 Hereinafter, an embodiment of the present invention will be described with reference to FIG. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.
本実施形態に係る廃棄物の最終処分場における収容部の閉塞方法は、図１に示すように、事業活動によって排出される産業廃棄物や、一般家庭から排出される生活廃棄物の最終処分を行う最終処分場１において用いられるものである。具体的には、最終処分場１は、廃棄物を収容する収容空間Ｒを形成するように凹状に形成された収容部２を備える。該収容部２は、収容空間Ｒと連通する開口部２ａを備える。収容部２は、地盤を所定の深度まで掘削して形成して形成される。また、収容部２の内面には、例えば、遮水シートやアスファルトなどの遮水材（図示せず）が敷設されて遮水性が確保されている。 As shown in FIG. 1, the container closure method in the final disposal site for waste according to the present embodiment is the final disposal of industrial waste discharged from business activities and domestic waste discharged from ordinary households. It is used in the final disposal site 1 to be performed. Specifically, the final disposal site 1 includes a storage portion 2 formed in a concave shape so as to form a storage space R for storing waste. The accommodating portion 2 includes an opening 2 a that communicates with the accommodating space R. The accommodating part 2 is formed by excavating the ground to a predetermined depth. Further, a water shielding material (not shown) such as a water shielding sheet or asphalt is laid on the inner surface of the housing portion 2 to ensure water shielding.
そして、収容部２内の所定の高さ位置まで収容部２内に廃棄物Ｘが収容された後、本実施形態に係る方法で収容部２が閉塞される。具体的には、ローム層から採取したローム土が圧縮されてなる圧縮層Ｙを収容部２の開口部２ａを覆うように形成することで、収容部２を閉塞する。ローム土は、地盤中のローム層（例えば、関東ローム層など）から採取されたものであることが好ましい。圧縮層Ｙを形成する方法としては、開口部２ａを覆うように前記ローム土を敷き詰める敷き詰め工程と、該敷き詰め工程で敷き詰められたローム土を圧縮して圧縮層を形成する圧縮工程とを行う方法を用いることができる。具体的には、敷き詰め工程と圧縮工程とを複数回繰り返すことで、所定厚みの圧縮層Ｙが形成される。ローム土の圧縮には、地盤の締め固めを行う重機等を用いることができる。 And after the waste X is accommodated in the accommodating part 2 to the predetermined | prescribed height position in the accommodating part 2, the accommodating part 2 is obstruct | occluded by the method which concerns on this embodiment. Specifically, the accommodating portion 2 is closed by forming a compressed layer Y formed by compressing loam soil collected from the loam layer so as to cover the opening 2 a of the accommodating portion 2. The loam soil is preferably collected from a loam layer in the ground (for example, Kanto loam layer). As a method of forming the compression layer Y, a method of performing a laying process of laying the loam soil so as to cover the opening 2a, and a compression process of compressing the loam soil laid in the laying process to form a compression layer Can be used. Specifically, the compression layer Y having a predetermined thickness is formed by repeating the spreading process and the compression process a plurality of times. A heavy machine or the like that compacts the ground can be used to compress the loam soil.
圧縮層Ｙの厚みとしては、特に限定されるものではないが、後述する盛土層との合計厚みが５０ｃｍ以上となるような厚みが好ましい。また、圧縮層Ｙを形成する際のローム土の圧縮度合いとしては、特に限定されるものではなく、圧縮層Ｙの透水係数が１×１０−５ｃｍ／秒以下（具体的には、６×１０−７〜１×１０−５ｃｍ／秒）となるように圧縮することが好ましい。該透水係数は、現場透水試験（地盤工学会 ＪＩＳ １３１６ 立坑法）等を用いて測定することができる。また、圧縮層Ｙを形成する際（圧縮する際）のローム土の含水量としては、特に限定されるものではないが、自然含水比程度であることが好ましい。自然含水比とは、自然状態における土の含水量であり、本実施形態では、地盤中のローム層からローム土を採取した直後の含有量である。例えば、ローム土の含水量（自然含水比）としては、１００％以上２００％以下であってもよく、圧縮層Ｙを形成するためには１５０％程度であることが好ましい。また、圧縮層Ｙは、開口部２ａと重なる領域の内側から外側に向かって高さが低くなるように傾斜した傾斜部Ｙ１を備えることが好ましい。 Although it does not specifically limit as thickness of the compression layer Y, The thickness from which the total thickness with the embankment layer mentioned later becomes 50 cm or more is preferable. Further, the degree of compression of the loam soil when forming the compressed layer Y is not particularly limited, and the hydraulic conductivity of the compressed layer Y is 1 × 10 −5 cm / second or less (specifically, 6 × 10 −7 to 1 × 10 −5 cm / sec) is preferable. The hydraulic conductivity can be measured using an on-site hydraulic test (Geotechnical Society JIS 1316 vertical shaft method) or the like. Further, the water content of the loam soil at the time of forming (compressing) the compressed layer Y is not particularly limited, but is preferably about the natural water content ratio. The natural water content is the water content of the soil in a natural state, and in this embodiment, the content immediately after the loam soil is collected from the loam layer in the ground. For example, the water content (natural water content ratio) of loam soil may be 100% or more and 200% or less, and in order to form the compressed layer Y, it is preferably about 150%. Moreover, it is preferable that the compression layer Y is provided with the inclination part Y1 inclined so that height may become low toward the outer side from the inner side of the area | region which overlaps with the opening part 2a.
また、本実施形態では、圧縮層Ｙとその周辺の地盤を覆うように盛り土を行って盛土層Ｚが形成される。該盛土層Ｚは、特に限定されるものではなく、圧縮層Ｙと盛土層Ｚとの合計厚みが５０ｃｍ以上となるように形成されることが好ましい。盛土層Ｚを形成する土としては、特に限定されるものではなく、例えば、植栽可能な土壌を用いることができ、具体的には、黒ボク土等を用いることができる。 Moreover, in this embodiment, the embankment layer Z is formed by performing embankment so that the compression layer Y and the surrounding ground may be covered. The embankment layer Z is not particularly limited, and is preferably formed so that the total thickness of the compressed layer Y and the embankment layer Z is 50 cm or more. The soil forming the embankment layer Z is not particularly limited. For example, soil that can be planted can be used, and specifically, black mycelium or the like can be used.
以上のように、本発明に係る廃棄物の最終処分場における収容部の閉塞方法、及び、最終処分場によれば、廃棄物の最終処分場において、より安価に収容部の閉塞を行うことができると共に、閉塞後の収容部への雨水の浸入を効果的に防止することができる。 As described above, according to the method for closing a storage unit at a final disposal site for waste according to the present invention and the final disposal site, the storage unit can be closed at a lower cost at the final disposal site for waste. In addition, it is possible to effectively prevent rainwater from entering the housing portion after the blockage.
即ち、ローム層から採取したローム土が圧縮されてなる圧縮層Ｙで開口部２ａの少なくとも一部を覆うことで、収容部２の閉塞を比較的安価で行うことができると共に、閉塞された収容部２への雨水の浸入を効果的に防止することができる。 That is, by covering at least a part of the opening 2a with the compressed layer Y obtained by compressing loam soil collected from the loam layer, the container 2 can be closed at a relatively low cost, and the blocked container is stored. It is possible to effectively prevent rainwater from entering the portion 2.
具体的には、ローム層は、日本国内の地盤に広く存在するものであるため、該ローム層から採取されるローム土は、比較的安価に入手することが可能である。このようなローム土を用いて収容部２を閉塞することで、比較的安価に収容部２の閉塞を行うことが可能となる。 Specifically, since the loam layer is widely present in the ground in Japan, the loam soil collected from the loam layer can be obtained at a relatively low cost. By closing the housing part 2 using such loam soil, the housing part 2 can be closed relatively inexpensively.
また、ローム土は、圧縮することによって透水係数が小さくなるため、ローム土が圧縮されてなる圧縮層Ｙは、従来から一般的な覆土として用いられている土よりも透水性が低いものになる。これにより、ローム土が圧縮されてなる圧縮層Ｙを用いて収容部２を閉塞することで、圧縮層Ｙに接触した雨水が圧縮層Ｙを透過するのを効果的に防止することができるため、閉塞された収容部２への雨水の浸入を効果的に防止することができる。 In addition, since the loam soil has a low water permeability coefficient by being compressed, the compressed layer Y formed by compressing the loam soil has a lower water permeability than the soil conventionally used as a general covering soil. . Thereby, since the accommodating part 2 is obstruct | occluded using the compression layer Y in which loam soil is compressed, it can prevent effectively that the rain water which contacted the compression layer Y permeate | transmits the compression layer Y. Intrusion of rainwater into the closed housing part 2 can be effectively prevented.
また、ローム土は、圧縮された状態であっても、変形可能な柔軟性を有する。このため、圧縮層Ｙの下の廃棄物Ｘの層が経時的な変化によって部分的に陥没するなどして変形した際にも、斯かる変形に追従して圧縮層Ｙが変形することになるため、圧縮層Ｙに亀裂や破断等の破損が生じるのを抑制することができる。これにより、閉塞された収容部２へ圧縮層Ｙの破損箇所を通じて雨水が浸入するのを効果的に防止することができる。 In addition, loam soil has a deformable flexibility even in a compressed state. For this reason, even when the layer of the waste X under the compression layer Y is deformed by being partially depressed due to a change with time, the compression layer Y is deformed following the deformation. Therefore, it is possible to suppress the occurrence of breakage such as cracks and breaks in the compressed layer Y. Thereby, it is possible to effectively prevent rainwater from entering the closed accommodating portion 2 through the damaged portion of the compressed layer Y.
また、透水係数が上記の範囲となるようにローム土を圧縮して圧縮層Ｙを形成することで、雨水が圧縮層Ｙを透過するのを効果的に防止することができるため、圧縮層Ｙで閉塞された収容部２への雨水の侵入をより効果的に防止することができる。 Moreover, since the loam soil is compressed so that the water permeability coefficient falls within the above range to form the compressed layer Y, rainwater can be effectively prevented from passing through the compressed layer Y. It is possible to more effectively prevent rainwater from entering the housing portion 2 closed by the.
傾斜部Ｙ１を備えるように圧縮層Ｙを形成することで、圧縮層Ｙ上の雨水は、傾斜部Ｙ１上を流れて開口部２ａの外側へ流出することになる。これにより、圧縮層Ｙで閉塞された収容部２へ開口部側から雨水が浸入するのをより効果的に防止することができる。 By forming the compressed layer Y so as to include the inclined portion Y1, rainwater on the compressed layer Y flows on the inclined portion Y1 and flows out of the opening 2a. Thereby, it can prevent more effectively that rainwater penetrate | invades into the accommodating part 2 obstruct | occluded with the compression layer Y from the opening part side.
前記圧縮層Ｙを覆うように盛土層Ｚを形成することで、収容部２への雨水の浸入を圧縮層Ｙと盛土層Ｚとによってより効果的に防止することができる。 By forming the embankment layer Z so as to cover the compressed layer Y, the intrusion of rainwater into the accommodating portion 2 can be more effectively prevented by the compressed layer Y and the embankment layer Z.
なお、本発明に係る廃棄物の最終処分場における収容部の閉塞方法、及び、最終処分場は、上記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変更が可能である。また、上記した複数の実施形態の構成や方法等を任意に採用して組み合わせてもよく（１つの実施形態に係る構成や方法等を他の実施形態に係る構成や方法等に適用してもよく）、さらに、下記の各種の変更例に係る構成や方法等を任意に選択して、上記した実施形態に係る構成や方法等に採用してもよいことは勿論である。 In addition, the closing method of the container in the final disposal site of the waste according to the present invention and the final disposal site are not limited to the above-described embodiment, and various changes can be made without departing from the gist of the present invention. Is possible. Further, the configurations and methods of the plurality of embodiments described above may be arbitrarily adopted and combined (even if the configurations and methods according to one embodiment are applied to the configurations and methods according to other embodiments). Of course, the configurations and methods according to the following various modifications may be arbitrarily selected and used for the configurations and methods according to the above-described embodiments.
例えば、図２に示すように、圧縮層Ｙと盛土層Ｚとの間に、圧縮層Ｙにおける収容部２の開口部２ａと重なる領域の外側へ圧縮層Ｙ上の水を排水する排水設備３を配置するように構成されてもよい。排水設備３は、複数の管状体３ａから構成される。該管状体３ａは、内側に形成された空間と連通する貫通孔（図示せず）を複数備え、該貫通孔から管状体３ａ内に水が侵入可能に構成されている。また、該管状体３ａは、圧縮層Ｙの傾斜部Ｙ１に沿って配置される。このような管状体３ａから構成される排水設備３を備えることで、管状体３ａにおける貫通孔から管状体３ａ内へ侵入した雨水が管状体３ａと通って圧縮層Ｙの外側へ排出される。 For example, as shown in FIG. 2, a drainage facility 3 that drains the water on the compression layer Y to the outside of the region of the compression layer Y that overlaps the opening 2 a of the accommodating portion 2 between the compression layer Y and the embankment layer Z. May be arranged. The drainage facility 3 is composed of a plurality of tubular bodies 3a. The tubular body 3a includes a plurality of through holes (not shown) communicating with a space formed on the inside, and is configured such that water can enter the tubular body 3a from the through holes. The tubular body 3a is disposed along the inclined portion Y1 of the compression layer Y. By providing the drainage facility 3 constituted by such a tubular body 3a, rainwater that has entered the tubular body 3a from the through hole in the tubular body 3a is discharged to the outside of the compressed layer Y through the tubular body 3a.
なお、排水設備３としては、上記のように複数の管状体３ａから構成されるもの以外として、例えば、面状に形成された排水シート（例えば、多孔性のシート材）等を圧縮層Ｙ上に敷設することで構成されてもよい。 In addition, as the drainage equipment 3, other than what is comprised from the some tubular body 3a as mentioned above, for example, the drainage sheet (for example, porous sheet material) etc. formed in planar shape etc. are on the compression layer Y. You may comprise by laying in.
このように、圧縮層Ｙにおける開口部２ａと重なる領域の外側へ圧縮層Ｙ上の水を排水する排水設備３を圧縮層Ｙ上に設けることで、圧縮層Ｙ上の雨水は、排水設備３によって開口部２ａの外側へ排水されることになる。これにより、圧縮層Ｙで閉塞された収容部２へ開口部２ａ側から雨水が浸入するのをより効果的に防止することができる。 Thus, by providing the drainage facility 3 on the compression layer Y for draining the water on the compression layer Y to the outside of the region overlapping the opening 2a in the compression layer Y, the rainwater on the compression layer Y is drained from the drainage facility 3. As a result, the water is drained to the outside of the opening 2a. Thereby, it can prevent more effectively that rainwater permeates into the accommodating part 2 obstruct | occluded with the compression layer Y from the opening part 2a side.
また、上記実施形態では、圧縮層Ｙは、開口部２ａを覆うように前記ローム土を敷き詰める敷き詰め工程と、該敷き詰め工程で敷き詰められたローム土を圧縮して圧縮層を形成する圧縮工程とを行うことで形成されているが、これに限定されるものではなく、例えば、最終処分場とは別な場所で、開口部２ａを覆うことが可能な面積でローム土を敷き詰めて圧縮することで、圧縮層Ｙを形成し、該圧縮層Ｙを開口部２ａ上に搬送して開口部２ａを閉塞するように構成されてもよい。 In the above-described embodiment, the compression layer Y includes a laying process of laying the loam soil so as to cover the opening 2a, and a compression process of forming the compression layer by compressing the loam soil laid in the laying process. Although it is formed by doing, it is not limited to this, for example, by spreading and compressing loam soil in an area that can cover the opening 2a in a place different from the final disposal site The compressed layer Y may be formed, and the compressed layer Y may be conveyed onto the opening 2a to close the opening 2a.
また、上記実施形態では、収容部２の開口部２ａの全体を圧縮層Ｙが覆うように構成されているが、これに限定されるものではなく、例えば、開口部２ａを部分的に覆うように圧縮層Ｙが形成されてもよい。 Moreover, in the said embodiment, although it comprises so that the compression layer Y may cover the whole opening part 2a of the accommodating part 2, it is not limited to this, For example, it may cover the opening part 2a partially The compression layer Y may be formed on the surface.
また、上記実施形態では、収容部２は、地盤が掘削されて形成されているが、これに限定されるものではなく、例えば、凹状の地形を利用して収容部２が形成されてもよい。 Moreover, in the said embodiment, although the accommodating part 2 is formed by excavating the ground, it is not limited to this, For example, the accommodating part 2 may be formed using a concave topography. .
また、上記実施形態では、圧縮層Ｙが傾斜部Ｙ１を備えるように構成されているが、これに限定されるものではなく、例えば、圧縮層Ｙの上面が略水平となるように形成されてもよい。 Moreover, in the said embodiment, although the compression layer Y is comprised so that it may be equipped with the inclination part Y1, it is not limited to this, For example, it forms so that the upper surface of the compression layer Y may become substantially horizontal. Also good.
また、上記実施形態では、圧縮層Ｙは、上面の中央部から外周部へ向かって傾斜するように形成された傾斜部Ｙ１を備えているが、これに限定されるものではなく、圧縮層Ｙの外周部における対向位置の一方側から他方側へ傾斜する傾斜部を備えるように構成されてもよい。 Moreover, in the said embodiment, although the compression layer Y is provided with the inclination part Y1 formed so that it may incline toward the outer peripheral part from the center part of an upper surface, it is not limited to this, The compression layer Y It may be configured to include an inclined portion that is inclined from one side to the other side of the opposing position in the outer peripheral portion.
１…最終処分場、２…収容部、２ａ…開口部、３…排水設備、３ａ…管状体、Ｒ…収容空間、Ｘ…廃棄物、Ｙ…圧縮層、Ｙ１…傾斜部、Ｚ…盛土層 DESCRIPTION OF SYMBOLS 1 ... Final disposal site, 2 ... Storage part, 2a ... Opening part, 3 ... Drainage equipment, 3a ... Tubular body, R ... Storage space, X ... Waste, Y ... Compression layer, Y1 ... Inclination part, Z ... Filling layer
Claims (10)
ローム層から採取したローム土が圧縮されてなる圧縮層で前記開口部の少なくとも一部を覆うことを特徴とする廃棄物の最終処分場における収容部の閉塞方法。 A method for closing a storage unit in a final disposal site for waste, which includes a storage unit that is formed in a concave shape so as to form a storage space for storing waste and has an opening communicating with the storage space,
A method for closing a container in a final disposal site for waste, wherein at least part of the opening is covered with a compressed layer formed by compressing loam soil collected from a loam layer.
ローム層から採取したローム土が圧縮されて形成されると共に前記開口部の少なくとも一部を覆うように形成された圧縮層を備えることを特徴とする廃棄物の最終処分場。 A final disposal site for waste comprising a storage portion formed in a concave shape so as to form a storage space for storing waste and having an opening communicating with the storage space,
A final disposal site for waste, comprising: a compressed layer formed by compressing loam soil collected from a loam layer and covering at least a part of the opening.
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| JPS5785414A (en) * | 1980-11-15 | 1982-05-28 | Takuma Sogo Kenkyusho:Kk | Reclamation construction work |
| JPS61133142A (en) * | 1984-12-03 | 1986-06-20 | Yoshio Taguchi | Mixed agent for forming adsorbent of metal |
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