JP3897872B2

JP3897872B2 - Waste storage structure, construction method thereof, and landfill method

Info

Publication number: JP3897872B2
Application number: JP25987397A
Authority: JP
Inventors: 太重加藤; 勝彦中井; 正郎石田; 紀夫山本
Original assignee: 株式会社間組
Priority date: 1997-09-25
Filing date: 1997-09-25
Publication date: 2007-03-28
Anticipated expiration: 2017-09-25
Also published as: JPH11100855A

Description

【０００１】
【発明の属する技術分野】
本発明は、廃棄物の貯留構造物、その構築方法および埋立て方法に関する。
【０００２】
【従来の技術】
近年、一般の廃棄物は、その容量を減少させるため焼却した後に埋立てを行っており、この焼却により生じた焼却残渣を埋立てる最終処分場としては、山間部か平野部を掘削すると共に、その周りに堤を構築し、内部に遮水シートを敷設して建設されている。しかしながら、遮水シートの破損で、周囲の土壌を汚染している事例があり、新たな建設が困難となっている。焼却残渣を埋め立てた場合、雨水等が浸透すると、有害物質が流出するため、継続的な水処理が必要である。
【０００３】
また上記最終処分場は焼却残渣で満たされると、その上部は覆土され、公園やグランド等の施設として利用される。つまり、閉鎖後の最終処分場の地上部には、遮水シートの破損を招くような杭基礎を設けることができないため、中低層建築物等の公共施設は構築できず、跡地の有効利用の点からは大きな制限があった。
【０００４】
一方、有害物質流出の危険性を防止するために、廃棄物処分場の上部を杭とコンクリート版等で閉鎖空間を構築し、この閉鎖空間に廃棄物や焼却残渣（以下、廃棄物等という）を埋め立てる、クローズドシステムの処分場が提案されているが、閉鎖空間では粉塵や臭気に対して作業員の安全を確保するという点で課題があった。
【０００５】
さらに、都市内の地盤を深く掘削して廃棄物の貯留構造物を構築する場合、都市内の下層地盤は砂礫層（透水層）が多いため、揚圧力対策が必要になる。その対策として揚水を、例えば１年以上の埋立て期間にわたって実施した場合には、仮にリチャージ工法を採用しても水位低下による地盤沈下を招く危険性がある。一方、揚圧力対策として貯留構造物内に水を満たし、この水中で廃棄物等を埋め立てた場合には、水が有害物質で汚染されるので水処理コストが嵩むという欠点がある。
【０００６】
【発明が解決しようとする課題】
本発明は上記従来技術の欠点に着目し、これを解決せんとしたものであり、その課題は、地盤沈下を招く地下水の揚水を埋立て期間中、行うこと無く揚圧力に対抗可能な廃棄物の貯留構造物、およびその構築方法を提供することにある。
【０００７】
本発明の別の課題は、廃棄物等により汚染される水量を低減すると共に、汚染水処理のコストを低減可能な廃棄物の貯留構造物、およびその埋立て方法を提供することにある。
【０００８】
また本発明の別の課題は、廃棄物等により粉塵や臭気が発生するのを防止可能な廃棄物の貯留構造物、およびその埋立て方法を提供することにある。
【０００９】
さらに本発明の別の課題は、施設の閉鎖後の跡地を有効に利用することができる廃棄物の貯留構造物、およびその構築方法を提供することにある。
【００１０】
【課題を解決するための手段】
上記課題を解決するために、本発明では、連続地中壁により形成して内部を掘削した筒状体と、該筒状体の底に設けた底版と、前記筒状体内を上下に仕切るため内周面との間に所定のクリアランスで配置した仕切り版と、該仕切り版に形成された開口と、前記仕切り版の下方から地上まで連通するように該開口に接続した開口筒状体と、前記仕切り版を前記筒状体内で上下動可能に懸吊する懸吊手段と、前記クリアランスを開閉するために前記仕切り版の外周で拡大縮小可能に設けた封止部材とを備え、前記開口筒状体の内部と、前記筒状体内の仕切り版の上下とに水が充たされたことを特徴とする廃棄物の貯留構造物を提供する。
ここで、前記筒状体や底版をコンクリート等の水密性のある材料により形成すれば、廃棄物等や、これにより汚染された水が内部から外部の地中に漏出するのを防止することができる。前記開口筒状体は廃棄物等や汚染水の外部への漏出を防止する遮蔽可能な材料で形成し、更に好ましくは、可撓性を有し且つ軽量な材料、例えば、内面又は外面が遮蔽材でコーティングされた布により形成する。また、前記開口筒状体は、その上端部が仕切り版上方に充たされた水面から突出するように支持手段で支持する。
【００１１】
前記封止部材は、拡大縮小可能な部材であって、仕切り版の外周と筒状体の内周面とのクリアランスを封止することができれば良く、例えば、空気等の気体を注入することにより膨張し、抜き取ることにより収縮する袋体と、この袋体に気体を出し入れするポンプと、このポンプと袋体とを接続する連通管とで形成することができる。また袋体は、袋体内部の気密性を維持できれば、それ自体が伸縮しない膜状材からも形成することができるが、好ましくは、ゴム等のように伸縮可能な弾性素材から形成する。
【００１２】
本発明の廃棄物の貯留構造物では、セメント等の固化材を混練してスラリー状に処理した廃棄物等（以下、スラリー状処理物という）を地上でバケットに入れ、このバケットを開口筒状体内を通して仕切り版の下方の筒状体内まで吊り降ろし、ここにスラリー状処理物を埋め立てる。この時、封止部材は拡大（膨張）させて、仕切り版外周と筒状体内面とのクリアランスを封止状態にする。これにより、仕切り版の下方の筒状体内や開口筒状体内には、廃棄物等や汚染水が存在するものの、これら以外の仕切り版上方の水は汚染されることなく維持される。また、スラリー状処理物の埋立て作業は、仕切り版下方の汚染された水が開口筒状体を介してその上端から溢れ出ないように、適宜、汚染水を汲み出しながら行う。そして、汲み出された汚染水を用いて廃棄物等の混練を行えば、従来のような汚染水を浄化するための装置や工程を省略することができる。
仕切り版下方に埋め立てたスラリー状処理物が所定容量以上になったら、懸吊装置によって仕切り版を所定高さだけ上昇させると共に、封止部材は適宜縮小させる。これにより、封止部材と筒状体の内面との間には隙間が生じるものの、仕切り版上昇時に生じる上方から下方への水流により、その下方の汚染水が上昇するのは阻止され、この時も仕切り版上方の水は汚染されることなく維持される。したがって、仕切り版の上昇にともない容量過剰となる仕切り版上方の水は、浄化処理する必要が無いため、従来のような汚染水浄化のための装置や工程を省略することができる。
【００１３】
本発明の廃棄物の貯留構造物において、前記筒状体をほぼ円筒状に形成し、前記仕切り版をほぼ円形に形成し、前記仕切り版を前記筒状体の内周面に沿って回転する回転手段を設けても良い。ここで、回転手段により仕切り版を回転させた時、仕切り版に接続している開口筒状体と懸吊手段が捩じれないように、それぞれを支持する手段を同様に回転移動させる必要がある。そのため、例えば、前記筒状体の円環状の上端面に沿って走行可能な車輪を備えた円盤状の蓋を、筒状体の上に配置し、車輪にはこれを可動させるモーターを設け、また蓋に貫通孔を形成してこの貫通孔に前記開口筒状体を通して固定し、さらに前記懸吊手段を蓋に固定すれば、円盤状の蓋を前記回転手段とすることができる。すなわち、モーターを稼働させて車輪を筒状体の上端面に沿って走行させ、円盤状の蓋を所定角度回転させると、懸吊手段により懸吊されている仕切り版も同じ角度だけ回転し、開口筒状体も同様に回転移動する。
かように形成された廃棄物の貯留構造物においては、開口筒状体を通して仕切り版の開口からスラリー状処理物を吊り込み、このスラリー状処理物が所定量以上になったら、仕切り版を適宜回転して開口の位置をずらし、再度、筒状体内へスラリー状処理物を吊り込み、この仕切り版の回転とスラリー状処理物の吊り込みとを繰り返し行う。これにより、筒状体内に水が充たされ、且つ、スラリー状処理物の吊り込み用開口数が制限されていても、埋立て場所（筒状体内）に隙間を生じること無く、スラリー状処理物を密実に埋立てることが可能となった。
【００１４】
本発明の廃棄物の貯留構造物において、前記仕切り版及び前記底版を貫通すると共に前記筒状体のほぼ中央に立設された中空の柱状体と、該底版及び前記筒状体の内部から外部に水や廃棄物が漏出するのを防止するために該底版及び前記筒状体の内面、並びに前記柱状体の外面に、遮蔽層として従来使用している遮水シート等を設ける。かような廃棄物の貯留構造物の建設段階では、中央部の柱状体を通して地下水を揚水し、揚圧力を低減して底版を施工する。また、埋立が終了して閉鎖した後、柱状体内は、支持層まで達する基礎杭を構築するために用いることができる。
【００１５】
また本発明は、上述した貯留構造物の構築方法を提供するものであって、その構築方法は、連続地中壁によって地盤内の支持層に達する円形の筒状体を形成し、該筒状体の略中央に中空の柱状体を立設して、その内部を所定深さまで掘削し、該柱状体内を通して地下水を揚水しながら前記筒状体内を所定深さまで掘削してその底部に底版を形成し、該底版及び前記筒状体の内部から外部に水や廃棄物が漏出するのを防止するための遮蔽層を該底版及び前記筒状体の内面、並びに前記柱状体の外面に形成し、前記筒状体内に所定容量の水を注水した後に、前記柱状体内を通しての地下水の揚水を停止し、前記筒状体内を上下に仕切るための仕切り版にその下方と地上とを連通する連通手段を設けた後に、該仕切り版を前記筒状体内に沈設して所定高さで支持し、以上の工程によって、該仕切り版の下方に前記遮蔽層を介して前記筒状体と前記底版とで囲まれた廃棄物の埋立てスペースを設けることを特徴とする。
【００１６】
さらに本発明は、上述した貯留構造物に廃棄物を埋め立てる方法を提供するものであって、その方法は、前記封止部材で前記クリアランスを閉鎖した後、廃棄物の焼却残渣に固化材を混練して予め処理したスラリー状処理物が入れられた容器を、前記開口筒状体を通して前記仕切り版の下方に吊り降ろし、ここに前記スラリー状処理物を埋立てて、該スラリー状処理物が所定量以上になったら、前記仕切り版を前記回転手段で所定角度回転し、順次、前記容器の吊り降ろし工程と、前記スラリー状処理物の埋立て工程と、前記仕切り版の回転工程とを繰り返し、前記仕切り版の下方に所定量以上のスラリー状処理物を充填した後に、前記封止部材による前記クリアランスの閉鎖を開放し、前記仕切り版を所定高さ上昇させて、再び前記封止部材で前記クリアランスを閉鎖し、前記前記容器の吊り降ろし工程と、前記スラリー状処理物の埋立て工程と、前記仕切り版の回転工程とを繰り返すことを特徴とする。
【００１７】
【実施例】
以下、添付図面に基づいて実施例を説明するが、本発明はこれに限定されるものではない。図１は図３(a)の一点鎖線I−Iに沿った廃棄物の貯留構造物の縦断面図であり、図２は図３(a)の一点鎖線II−IIに沿った廃棄物の貯留構造物の縦断面図であり、図３(a)は上蓋の平面図であり、図３(b)は図３(a)の一点鎖線IIIb−IIIbに沿った上蓋付近の拡大断面図であり、図４(a)は間仕切り版の平面図であり、図４(b)は図４(a)の一点鎖線IVb−IVbに沿った間仕切り版付近の拡大断面図である。
【００１８】
本発明の廃棄物の貯留構造物１は、内部が掘削された円筒状の連続地中壁１０と、連続地中壁１０の底にコンクリートによって形成された底版１７と、連続地中壁１０内を上下に仕切るため、その内周面との間に所定のクリアランスで配置された円形の仕切り版１５と、前記クリアランスを開閉するために仕切り版の外周に配置され、拡大縮小可能に形成された空気袋１６ａと、連続地中壁１０内で仕切り版１５を上下動可能に懸吊する懸吊手段としての吊棒２１及びジャッキ２２と、仕切り版１５に形成された埋立用開口１５ａと、仕切り版１５の下方から地上まで連通するように埋立用開口１５ａに接続された可撓性筒状体１２と、可撓性筒状体１２の内部と連続地中壁１０内の仕切り版１５の上下とに充たされた水とを備える。
【００１９】
ここで、前記連続地中壁１０は、従来工法により支持層３６に達するようにコンクリート等で円筒状に構築し、その略中央に鋼管柱１８を建て込み、この鋼管柱１８の下端を、支持層３６よりも所定高さ上方で止める。そして、鋼管柱１８の内部を掘削し、その底に排水ポンプ（図示せず）を入れて地下水を揚水しながら連続地中壁１０内を掘削する。鋼管柱１８の下端よりも上方の所定深さ、すなわち、連続地中壁１０が充分な根入れ長さを確保できる程度の深さまで、連続地中壁１０内を掘削したら、その底にコンクリート等を打設して底版１７を形成する。この底版１７と連続地中壁１０とは密実なコンクリートで形成し、さらに、遮水シート１１を、底版１７の上面と、連続地中壁１０の内周面と、鋼管柱１８の外周面とに隙間無く敷設して遮蔽層を形成する。この遮水シート１１によりスラリー状処理物やこれに含まれる物質の地盤内への漏出は防止できて、さらに、底版１７と連続地中壁１０とを密実なコンクリートで形成することで遮蔽性能はいっそう向上する。遮水シート１１の敷設後、連続地中壁１０の内部に水を注入し、この水による圧力が、地下水による揚圧力よりも大きくなったら、鋼管柱１８内の排水ポンプによる揚水を停止する。
【００２０】
また、前記空気袋１６ａは、ゴム等の弾性材料と、この弾性材料を補強する炭素繊維等の補強繊維材料とを含む、それ自体が伸縮可能な膜状材料から形成するのが好ましい。また鋼管柱１８の外周面と仕切り版１５の貫通孔の内周面との間のクリアランスには、ここを開閉するための空気袋１６ｂを仕切り版１５の貫通孔の内周面に取り付ける。なお、空気袋１６ｂは空気袋１６ａと同様な膜状材料から形成する。
【００２１】
さらに、前記連続地中壁１０の上には、その上端開口を覆うことができる大きさに形成した上蓋１３を設ける。すなわち、図３(a)(b)に示したように、連続地中壁１０の上端開口よりも若干大きな直径で上蓋１３を形成し、この上蓋１３における、連続地中壁１０の上端面に対向する位置に回転装置１４を固定する。詳細に図示はしないが、前記回転装置１４は、円形状の連続地中壁１０の上端面を走行することができるように形成された車輪と、必要に応じてこの車輪を動かすモーターとを備え、さらに好ましくは、前記車輪が走行することができるレールを連続地中壁１０の上端面に円環状に敷設する。また前記上蓋１３には、鋼管柱１８、可撓性筒状体１２及び吊棒２１のための貫通孔を形成する。すなわち、鋼管柱１８のための貫通孔は上蓋１３のほぼ中央に形成し、上蓋１３が鋼管柱１８を中心に回転可能にする。また可撓性筒状体１２は貫通孔（埋立用開口１３ａ）を通してそこに上端を固定し、さらに、吊棒２１のための貫通孔の上面にはジャッキ２２を固定し、このジャッキ２２と貫通孔とに吊棒２１の上端を挿通し、ここで吊棒２１を支持する。さらに、ジャッキ２２により上端が支持された吊棒２１は、連続地中壁１０内を下方に延びて、その下端が仕切り版１５に固定され、これによって仕切り版１５を所定の高さに懸吊する。この吊棒２１を油圧ジャッキ２２によって上下動させることで、仕切り版１５を連続地中壁１０の内面に沿って上昇あるいは下降させることができる。
また上蓋１３では、モーターを稼働して車輪を連続地中壁１０の上端面で走行させれば、上蓋１３は、吊棒２１を介して懸吊した仕切り版１５とともに所定角度回転し、このとき、埋立用開口１５ａから上蓋１３まで延長する可撓性筒状体１２も捩じれること無く回転移動させることができる。
【００２２】
前記仕切り版１５には、図４(a)(b)に示したように、スラリー状処理物を下方へ通すための貫通孔、すなわち埋立用開口１５ａと、鋼管柱１８を通すための貫通孔と、仕切り版１５の上下動の際に水を通過させて抵抗を低減するための開口、すなわち抵抗低減用開口２３とを形成する。ここで、埋立用開口１５ａは、図示したように、円形の仕切り版１５の直径線上に複数が並ぶ配置で形成するのが好ましく、これにより、仕切り版１５を所定角度ずつ回転させて埋立用開口１５ａからスラリー状処理物を吊り降ろせば、仕切り版１５の下方の連続地中壁１０内には隙間無くスラリー状処理物を埋め立てることができる。なお、埋立用開口１５ａには可撓性筒状体１２の下端を接続する。
また前記抵抗低減用開口２３には、開閉自在な開閉蓋２４を設ける。これによって、連続地中壁１０内に仕切り版１５を沈設する際には、予め開閉蓋２４を開けてここから上方へ水が流れるようにして抵抗を低減し、一方、スラリー状処理物を埋め立てる前には開閉蓋２４を閉鎖し、仕切り版１５上方の水が汚染されるのを防止し、さらに、所定量のスラリー状処理物を埋め立てた後には、必要に応じて、仕切り版１５を上昇させながら開閉蓋２４を開放すれば、ここから下方へ水が流れて、仕切り版１５の受ける抵抗は低減する。
【００２３】
次に、本発明の貯留構造物１にスラリー状処理物を埋め立てる方法について説明する。図１及び図２に示したように、貯留構造物１では、連続地中壁１０内と可撓性筒状体１２内に水が充填され、仕切り版１５は連続地中壁１０内の下方の所定高さに懸吊され、空気袋１６ａ，１６ｂによって仕切り版１５と連続地中壁１０とのクリアランス、及び仕切り版１５と鋼管柱１８とのクリアランスは封止されている。かような貯留構造物１において、廃棄物は焼却した後に、その焼却残渣にセメント等の固化材を混練して地上でスラリー状に処理し、このスラリー状処理物を地上でバケット３０に入れ、バケット３０をワイヤーロープ３１を介して揚重機（図示せず）で吊り上げて、上蓋１３の埋立用開口１３ａから可撓性筒状体１２内を通して、さらに、仕切り版１５の埋立用開口１５ａから下方スペース２０ｂ（図２参照）に吊り降ろし、ここにスラリー状処理物４０を埋め立てる。この時、空気袋１６ａ，１６ｂは膨張しており、仕切り版１５と、連続地中壁１０及び鋼管柱１８とクリアランスを封止している。これにより、仕切り版１５の下方の下方スペース２０ｂや可撓性筒状体１２内には、スラリー状処理物や汚染水が存在するが、これら以外の仕切り版１５上方の上方スペース２０ａの水は汚染されることなく維持される。また、スラリー状処理物４０の埋立て作業は、仕切り版１５下方の汚染された水が可撓性筒状体１２を介してその上端から溢れ出ないように、適宜、汚染水を汲み出しながら行うが、この汲出し容量は従来の汚染水量と比較すると格段に少量となり、この少量の汚染水はスラリー処理の際に消費され、従来のように汚染水浄化のための装置や工程を必要としない。
【００２４】
また、可撓性筒状体１２を通して仕切り版１５の埋立用開口１５ａからスラリー状処理物４０を投入し、このスラリー状処理物４０が所定容量以上になったら、仕切り版１５を適宜回転して埋立用開口１５ａの位置をずらす。すなわち、回転装置１４のモーターを稼働させて車輪を連続地中壁１０の上端面に沿って走行させ、上蓋１３を所定角度回転させると、吊棒２１により懸吊されている仕切り版１５も同じ角度だけ回転し、埋立用開口１５ａの位置をずらすことができる。埋立用開口１５ａの回転移動後、再度、可撓性筒状体１２内を通してスラリー状処理物４０を吊り降ろし、スラリー状処理物４０の埋立てと仕切り版１５の回転とを繰り返し行う。かような繰返しにより、連続地中壁１０内に水が充たされた状態で、且つ、スラリー状処理物４０の投入用開口の位置が限定されている場合であっても、連続地中壁１０内に無駄な隙間を生じること無く、スラリー状処理物４０を隅々にまで密実に埋立てることが可能となった。
【００２５】
次いで、下方スペース２０ｂがスラリー状処理物４０で所定容量以上になったら、仕切り版１５を適宜上昇させる。すなわち、ジャッキ２２により吊棒２１を所定高さだけ上方にスライドさせると共に、空気袋１６ａ，１６ｂは適宜縮小させる。これにより、空気袋１６ａ，１６ｂと連続地中壁１０及び鋼管柱１８との間には隙間が生じるものの、仕切り版１５の上昇時に生じる上方から下方への水流により、その下方の汚染水が上昇するのは阻止され、この時も仕切り版１５上方の水は汚染されることなく維持される。したがって、仕切り版の上昇にともない容量過剰となる仕切り版１５の上方スペース２０ａの水は、浄化処理せずにそのまま放流することができるため、従来のような汚染水浄化のための装置や工程を省略することができる。
【００２６】
上述したように、仕切り版１５の回転と上昇を繰り返し、連続地中壁１０内の全容量にスラリー状処理物４０を埋立てたら、鋼管柱１８内に新たに基礎杭１８ａを支持層３６まで打ち込んで支持杭を設ければ、連続地中壁１０とこの支持杭を地上部の構造物の基礎とすることができて、基礎スパンを短くできるため、より経済的となる。
【図面の簡単な説明】
【図１】図３(a)の一点鎖線I−Iに沿った廃棄物の貯留構造物の縦断面図である。
【図２】図３(a)の一点鎖線II−IIに沿った廃棄物の貯留構造物の縦断面図である。
【図３】 (a)は上蓋の平面図であり、(b)は(a)の一点鎖線IIIb−IIIbに沿った上蓋付近の拡大断面図である。
【図４】 (a)は間仕切り版の平面図であり、(b)は(a)の一点鎖線IVb−IVbに沿った間仕切り版付近の拡大断面図である。
【符号の説明】
１廃棄物の貯留構造物
１０連続地中壁（筒状体）
１１遮蔽層（遮水シート）
１２可撓性筒状体（開口筒状体）
１４回転装置
１５仕切り版
１５ａ埋立用開口（開口）
１６ａ，１６ｂ空気袋（封止部材）
１７底版
２１吊棒（懸吊手段）
２２ジャッキ（懸吊手段）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waste storage structure, a construction method thereof, and a landfill method.
[0002]
[Prior art]
In recent years, general waste has been landfilled after incineration in order to reduce its capacity, and as a final disposal site to reclaim incineration residue generated by this incineration, drilling in the mountains or plains, It is constructed by building a bank around it and laying a waterproof sheet inside. However, there are cases in which the surrounding soil is contaminated by the breakage of the water shielding sheet, making new construction difficult. When incineration residue is landfilled, if rainwater penetrates, harmful substances will flow out, so continuous water treatment is necessary.
[0003]
When the final disposal site is filled with incineration residue, the upper part is covered with soil and used as facilities such as parks and grounds. In other words, since it is not possible to provide pile foundations on the ground of the final disposal site after closing, which will cause damage to the water-impervious sheet, public facilities such as medium- and low-rise buildings cannot be constructed. There was a big limitation in terms.
[0004]
On the other hand, in order to prevent the risk of toxic substance spills, a closed space is constructed with piles and concrete slabs at the top of the waste disposal site, and waste and incineration residues (hereinafter referred to as waste, etc.) in this closed space A closed system disposal site has been proposed, but there was a problem in the closed space to ensure the safety of workers against dust and odor.
[0005]
Furthermore, when constructing a waste storage structure by deeply excavating the ground in the city, it is necessary to take measures for lifting pressure because the lower ground in the city has many gravel layers (permeable layers). As a countermeasure, when pumping is carried out over a landfill period of, for example, one year or more, there is a risk of ground subsidence due to a drop in water level even if the recharge method is adopted. On the other hand, when the storage structure is filled with water as a countermeasure for lifting pressure and waste or the like is buried in the water, there is a disadvantage that the water treatment cost increases because the water is contaminated with harmful substances.
[0006]
[Problems to be solved by the invention]
The present invention focuses on the drawbacks of the prior art described above and is intended to solve this problem. The problem is that waste that can withstand lifting pressure without performing groundwater pumping that causes land subsidence during the landfill period. It is in providing the storage structure of this, and its construction method.
[0007]
Another object of the present invention is to provide a waste storage structure that can reduce the amount of water contaminated by wastes and the like and reduce the cost of treatment of contaminated water, and a landfill method thereof.
[0008]
Another object of the present invention is to provide a waste storage structure capable of preventing generation of dust and odor due to waste and the like, and a landfill method thereof.
[0009]
Still another object of the present invention is to provide a waste storage structure that can effectively use the site after the facility is closed, and a construction method thereof.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, in the present invention, a cylindrical body formed by a continuous underground wall and excavated inside, a bottom plate provided at the bottom of the cylindrical body, and the cylindrical body for partitioning vertically A partition plate disposed with a predetermined clearance between the inner peripheral surface, an opening formed in the partition plate, and an opening tubular body connected to the opening so as to communicate from below the partition plate to the ground; Suspension means for suspending the partition plate so as to be movable up and down in the cylindrical body, and a sealing member provided on the outer periphery of the partition plate so as to be able to expand and contract in order to open and close the clearance. Provided is a waste storage structure in which water is filled in the inside of a cylindrical body and above and below the partition plate in the cylindrical body.
Here, if the cylindrical body and the bottom slab are made of a watertight material such as concrete, it is possible to prevent wastes and water contaminated thereby from leaking from the inside to the outside ground. it can. The open cylindrical body is formed of a shieldable material that prevents leakage of waste or contaminated water to the outside, and more preferably a flexible and lightweight material such as an inner surface or an outer surface is shielded. Formed by cloth coated with material. Moreover, the said opening cylindrical body is supported by a support means so that the upper end part may protrude from the water surface with which the partition plate upper part was filled.
[0011]
The sealing member is a member that can be scaled up and down, as long as it can seal the clearance between the outer periphery of the partition plate and the inner peripheral surface of the cylindrical body. For example, by injecting a gas such as air It can be formed by a bag body that expands and contracts by being extracted, a pump that draws gas into and out of the bag body, and a communication pipe that connects the pump and the bag body. The bag body can be formed from a film-like material that does not expand and contract as long as the airtightness inside the bag body can be maintained, but is preferably formed from a stretchable elastic material such as rubber.
[0012]
In the waste storage structure of the present invention, waste or the like (hereinafter referred to as slurry-like processed material) that has been kneaded with a solidifying material such as cement and processed into a slurry is put in a bucket on the ground, and the bucket is formed in an open cylindrical shape. The slurry is suspended through the body to the cylindrical body below the partition plate, and the slurry-like processed material is buried here. At this time, the sealing member is expanded (expanded) so that the clearance between the outer periphery of the partition plate and the inner surface of the cylindrical body is in a sealed state. Thereby, although waste etc. and contaminated water exist in the cylindrical body below the partition plate and the open cylindrical body, the water above the partition plate other than these is maintained without being contaminated. In addition, the landfill operation of the slurry-like processed product is performed while appropriately pumping out the contaminated water so that the contaminated water below the partition plate does not overflow from the upper end through the open cylindrical body. And if the waste water etc. are kneaded using the contaminated water pumped out, the conventional apparatus and process for purifying the contaminated water can be omitted.
When the slurry-like processed material buried below the partition plate exceeds a predetermined volume, the partition plate is raised by a predetermined height by the suspension device, and the sealing member is appropriately reduced. As a result, although a gap is formed between the sealing member and the inner surface of the cylindrical body, the lower contaminated water is prevented from rising due to the water flow from the upper side to the lower side when the partition plate is raised. The water above the partition plate is maintained without being contaminated. Therefore, since the water above the partition plate that becomes excessive in capacity as the partition plate rises does not need to be purified, the conventional apparatus and process for cleaning contaminated water can be omitted.
[0013]
In the waste storage structure of the present invention, the cylindrical body is formed in a substantially cylindrical shape, the partition plate is formed in a substantially circular shape, and the partition plate is rotated along the inner peripheral surface of the cylindrical body. A rotating means may be provided. Here, when the partition plate is rotated by the rotating means, it is necessary to similarly rotate and move the means for supporting each of the opening cylindrical body connected to the partition plate and the suspension means so as not to twist. Therefore, for example, a disc-shaped lid provided with a wheel that can travel along the annular upper end surface of the cylindrical body is disposed on the cylindrical body, and a motor that moves the wheel is provided on the wheel. Further, if a through hole is formed in the lid, the opening cylindrical body is fixed to the through hole, and the suspension means is fixed to the lid, a disk-shaped lid can be used as the rotating means. That is, when the motor is operated to run the wheel along the upper end surface of the cylindrical body and the disk-shaped lid is rotated by a predetermined angle, the partition plate suspended by the suspension means is also rotated by the same angle, The open cylindrical body also rotates in the same manner.
In the waste storage structure thus formed, the slurry-like processed material is suspended from the opening of the partition plate through the opening cylindrical body, and when the slurry-like processed material exceeds a predetermined amount, the partition plate is appropriately attached. Rotate to shift the position of the opening, and again suspend the slurry-like processed material into the cylindrical body, and repeatedly rotate the partition plate and suspend the slurry-like processed material. As a result, even if the cylindrical body is filled with water and the numerical aperture for hanging the slurry-like processed product is limited, the slurry-like processing is performed without generating a gap in the landfill place (cylindrical body). It became possible to bury the object densely.
[0014]
In the waste storage structure according to the present invention, a hollow columnar body penetrating through the partition plate and the bottom plate and standing substantially at the center of the cylindrical body, and from the inside of the bottom plate and the cylindrical body to the outside In order to prevent water and waste from leaking out, a water shielding sheet or the like conventionally used as a shielding layer is provided on the bottom plate, the inner surface of the cylindrical body, and the outer surface of the columnar body. At the construction stage of such a waste storage structure, groundwater is pumped through the central columnar body, and the bottom plate is constructed by reducing the pumping pressure. In addition, after the landfill is completed and closed, the columnar body can be used to construct a foundation pile that reaches the support layer.
[0015]
Moreover, this invention provides the construction method of the storage structure mentioned above, Comprising: The construction method forms the circular cylindrical body which reaches the support layer in the ground by the continuous underground wall, and this cylindrical shape A hollow columnar body is erected at the approximate center of the body, the inside is excavated to a predetermined depth, and the cylindrical body is excavated to a predetermined depth while pumping groundwater through the columnar body to form a bottom plate at the bottom And forming a shielding layer on the bottom plate and the inner surface of the cylindrical body and the outer surface of the columnar body to prevent leakage of water and waste from the inside of the bottom plate and the cylindrical body to the outside, After injecting a predetermined volume of water into the cylindrical body, stopping the pumping of groundwater through the columnar body, and communicating means for communicating the lower part and the ground with a partition plate for partitioning the cylindrical body up and down After providing, the partition plate is placed in the cylindrical body. Supported by height, by the above steps, and providing a space reclamation of the enclosed waste the tubular body through the shielding layer below the the partition plate and the bottom plate.
[0016]
Furthermore, the present invention provides a method for reclaiming waste in the above-mentioned storage structure, and the method closes the clearance with the sealing member, and then kneads the solidified material into the waste incineration residue Then, the container in which the slurry-like processed material that has been pre-treated is placed is suspended below the partition plate through the opening cylindrical body, and the slurry-like processed material is buried in the container, and the slurry-like processed material is placed in place. When the amount is equal to or more than a fixed amount, the partition plate is rotated by a predetermined angle by the rotating means, and the container hanging process, the slurry-like processed landfill process, and the partition plate rotation process are sequentially repeated. After filling a predetermined amount or more of the slurry-like processed material under the partition plate, the sealing member is opened to close the clearance, the partition plate is raised by a predetermined height, and the sealing portion is again formed. In closing the clearance, the steps down hanging said container, and a step reclamation of the slurry treated, and repeating the rotation step of the partition plate.
[0017]
【Example】
Hereinafter, although an example is described based on an accompanying drawing, the present invention is not limited to this. FIG. 1 is a longitudinal sectional view of a waste storage structure taken along the dashed-dotted line II in FIG. 3A, and FIG. 2 is a waste sectional view taken along the dashed-dotted line II-II in FIG. FIG. 3 (a) is a plan view of the upper lid, and FIG. 3 (b) is an enlarged cross-sectional view of the vicinity of the upper lid along the one-dot chain line IIIb-IIIb in FIG. 3 (a). 4 (a) is a plan view of the partition plate, and FIG. 4 (b) is an enlarged cross-sectional view of the partition plate and its vicinity along the alternate long and short dash line IVb-IVb in FIG. 4 (a).
[0018]
A waste storage structure 1 according to the present invention includes a cylindrical continuous underground wall 10 whose inside is excavated, a bottom slab 17 formed of concrete on the bottom of the continuous underground wall 10, and an interior of the continuous underground wall 10. And a circular partition plate 15 arranged with a predetermined clearance between the inner peripheral surface of the partition plate and an outer periphery of the partition plate for opening and closing the clearance, and can be enlarged and reduced. An air bag 16a, a suspension bar 21 and a jack 22 as suspension means for suspending the partition plate 15 so as to move up and down within the continuous underground wall 10, a landfill opening 15a formed in the partition plate 15, and a partition The flexible cylindrical body 12 connected to the landfill opening 15a so as to communicate from the lower side of the plate 15 to the ground, and the upper and lower sides of the partition plate 15 in the flexible cylindrical body 12 and the continuous underground wall 10 And water filled.
[0019]
Here, the continuous underground wall 10 is constructed in a cylindrical shape with concrete or the like so as to reach the support layer 36 by a conventional construction method, and a steel pipe column 18 is built at substantially the center thereof, and the lower end of the steel pipe column 18 is supported. Stop at a predetermined height above the layer 36. And the inside of the steel pipe pillar 18 is excavated, a drainage pump (not shown) is put in the bottom, and the inside of the continuous underground wall 10 is excavated while pumping up groundwater. After excavating the inside of the continuous underground wall 10 to a predetermined depth above the lower end of the steel pipe column 18, that is, a depth that allows the continuous underground wall 10 to secure a sufficient penetration depth, concrete or the like is formed at the bottom thereof. To form the bottom plate 17. The bottom plate 17 and the continuous underground wall 10 are made of solid concrete. Further, the water shielding sheet 11 includes the upper surface of the bottom plate 17, the inner peripheral surface of the continuous underground wall 10, and the outer peripheral surface of the steel pipe column 18. A shielding layer is formed by laying without any gap. This water shielding sheet 11 can prevent the slurry-like processed material and the substances contained therein from leaking into the ground, and further, the bottom plate 17 and the continuous underground wall 10 are formed of dense concrete to provide shielding performance. Will improve further. After laying the water-impervious sheet 11, water is injected into the continuous underground wall 10, and when the pressure by the water becomes higher than the pumping pressure by the groundwater, the pumping by the drainage pump in the steel pipe column 18 is stopped.
[0020]
The air bag 16a is preferably formed from a film-like material that itself can expand and contract, including an elastic material such as rubber and a reinforcing fiber material such as carbon fiber that reinforces the elastic material. In addition, an air bag 16 b for opening and closing here is attached to the inner peripheral surface of the through hole of the partition plate 15 in the clearance between the outer peripheral surface of the steel pipe column 18 and the inner peripheral surface of the through hole of the partition plate 15. The air bag 16b is formed of a film-like material similar to the air bag 16a.
[0021]
Further, an upper lid 13 is provided on the continuous underground wall 10 so as to have a size capable of covering the upper end opening. That is, as shown in FIGS. 3 (a) and 3 (b), the upper lid 13 is formed with a diameter slightly larger than the upper end opening of the continuous underground wall 10, and the upper lid 13 is formed on the upper end surface of the continuous underground wall 10. The rotating device 14 is fixed at the facing position. Although not shown in detail, the rotating device 14 includes a wheel formed so as to be able to travel on the upper end surface of the circular continuous underground wall 10 and a motor that moves the wheel as necessary. More preferably, a rail on which the wheel can travel is laid in an annular shape on the upper end surface of the continuous underground wall 10. The upper lid 13 is formed with through holes for the steel pipe column 18, the flexible tubular body 12, and the suspension rod 21. That is, the through hole for the steel pipe column 18 is formed in the approximate center of the upper lid 13 so that the upper lid 13 can rotate around the steel pipe column 18. The flexible cylindrical body 12 has an upper end fixed thereto through a through-hole (landfill opening 13a), and a jack 22 is fixed to the upper surface of the through-hole for the hanging rod 21. The upper end of the suspension rod 21 is inserted into the hole, and the suspension rod 21 is supported here. Furthermore, the suspension bar 21 whose upper end is supported by the jack 22 extends downward in the continuous underground wall 10 and its lower end is fixed to the partition plate 15, thereby suspending the partition plate 15 to a predetermined height. To do. The partition plate 15 can be raised or lowered along the inner surface of the continuous underground wall 10 by moving the suspension bar 21 up and down by the hydraulic jack 22.
Further, in the upper lid 13, if the motor is operated and the wheels are caused to travel on the upper end surface of the continuous underground wall 10, the upper lid 13 rotates with a partition plate 15 suspended through the suspension rod 21 at a predetermined angle. The flexible cylindrical body 12 extending from the landfill opening 15a to the upper lid 13 can also be rotated without being twisted.
[0022]
As shown in FIGS. 4 (a) and 4 (b), the partition plate 15 has a through hole for passing the slurry-like processed material downward, that is, a landfill opening 15a and a through hole for passing the steel pipe column 18. Then, when the partition plate 15 is moved up and down, an opening for reducing the resistance by allowing water to pass therethrough, that is, the resistance reducing opening 23 is formed. Here, as shown in the drawing, the landfill opening 15a is preferably formed in a plurality of arrangements on the diameter line of the circular partition plate 15, so that the partition plate 15 is rotated by a predetermined angle to fill the landfill opening. If the slurry-like processed product is suspended from 15a, the slurry-like processed product can be buried in the continuous underground wall 10 below the partition plate 15 without a gap. The lower end of the flexible cylindrical body 12 is connected to the landfill opening 15a.
The resistance reducing opening 23 is provided with an openable / closable lid 24. As a result, when the partition plate 15 is set in the continuous underground wall 10, the opening / closing lid 24 is opened in advance to reduce the resistance by allowing water to flow upward from there, while the slurry-like processed material is buried. Before, the opening / closing lid 24 is closed to prevent the water above the partition plate 15 from being contaminated, and after the predetermined amount of slurry-like processed material is reclaimed, the partition plate 15 is raised as necessary. If the opening / closing lid 24 is opened while the water is flowing, water flows downward from here and the resistance received by the partition plate 15 is reduced.
[0023]
Next, a method for filling a slurry-like processed material in the storage structure 1 of the present invention will be described. As shown in FIGS. 1 and 2, in the storage structure 1, the continuous underground wall 10 and the flexible tubular body 12 are filled with water, and the partition plate 15 is located below the continuous underground wall 10. The clearance between the partition plate 15 and the continuous underground wall 10 and the clearance between the partition plate 15 and the steel pipe column 18 are sealed by the air bags 16a and 16b. In such a storage structure 1, after the waste is incinerated, the incineration residue is kneaded with a solidifying material such as cement and processed into a slurry form on the ground. The bucket 30 is lifted by a lifting machine (not shown) via a wire rope 31, passes through the flexible tubular body 12 from the landfill opening 13 a of the upper lid 13, and further downward from the landfill opening 15 a of the partition plate 15. It hangs down in the space 20b (refer FIG. 2), and the slurry-like processed material 40 is filled up here. At this time, the air bags 16a and 16b are inflated to seal the partition plate 15, the continuous underground wall 10 and the steel pipe column 18 with the clearance. As a result, slurry-like processed products and contaminated water exist in the lower space 20b below the partition plate 15 and the flexible cylindrical body 12, but the water in the upper space 20a above the partition plate 15 other than these remains. Maintained without contamination. In addition, the landfill operation of the slurry-like processed product 40 is performed while appropriately pumping out the contaminated water so that the contaminated water below the partition plate 15 does not overflow from the upper end through the flexible cylindrical body 12. However, this pumping capacity is much smaller than the amount of conventional contaminated water, and this small amount of contaminated water is consumed during slurry processing, and does not require conventional equipment or processes for purification of contaminated water. .
[0024]
Further, the slurry-like processed product 40 is introduced from the landfill opening 15a of the partition plate 15 through the flexible cylindrical body 12. When the slurry-like processed product 40 exceeds a predetermined capacity, the partition plate 15 is appropriately rotated. The position of the landfill opening 15a is shifted. That is, when the motor of the rotating device 14 is operated so that the wheel travels along the upper end surface of the continuous underground wall 10 and the upper lid 13 is rotated by a predetermined angle, the partition plate 15 suspended by the suspension rod 21 is the same. It can be rotated by an angle to shift the position of the landfill opening 15a. After the rotational movement of the landfill opening 15a, the slurry-like processed product 40 is suspended again through the flexible cylindrical body 12, and the slurry-like processed product 40 is repeatedly landed and the partition plate 15 is rotated. Even if the continuous underground wall 10 is filled with water by such repetition and the position of the opening for the slurry-like processed product 40 is limited, the continuous underground wall Thus, the slurry-like processed product 40 can be buried in every corner without any useless gaps.
[0025]
Next, when the lower space 20b becomes a predetermined volume or more in the slurry-like processed product 40, the partition plate 15 is appropriately raised. That is, the suspension rod 21 is slid upward by a predetermined height by the jack 22, and the air bags 16a and 16b are appropriately reduced. As a result, a gap is generated between the air bags 16a and 16b and the continuous underground wall 10 and the steel pipe column 18, but the lower contaminated water rises due to the water flow from the upper side to the lower side when the partition plate 15 is raised. In this case, the water above the partition plate 15 is maintained without being contaminated. Accordingly, the water in the upper space 20a of the partition plate 15 that becomes excessive in capacity as the partition plate rises can be discharged as it is without purification treatment. Can be omitted.
[0026]
As described above, when the slurry plate 40 is buried in the entire capacity of the continuous underground wall 10 by repeatedly rotating and raising the partition plate 15, the foundation pile 18 a is newly placed in the steel pipe column 18 to the support layer 36. If a support pile is provided by driving in, the continuous underground wall 10 and the support pile can be used as the foundation of the structure on the ground, and the foundation span can be shortened.
[Brief description of the drawings]
FIG. 1 is a vertical cross-sectional view of a waste storage structure along an alternate long and short dash line II in FIG.
FIG. 2 is a vertical cross-sectional view of a waste storage structure along an alternate long and short dash line II-II in FIG.
3A is a plan view of the upper lid, and FIG. 3B is an enlarged cross-sectional view of the vicinity of the upper lid along the one-dot chain line IIIb-IIIb in FIG.
FIG. 4A is a plan view of a partition plate, and FIG. 4B is an enlarged cross-sectional view of the vicinity of the partition plate along the dashed line IVb-IVb in FIG.
[Explanation of symbols]
1 Waste storage structure 10 Continuous underground wall (tubular body)
11 Shielding layer (water shielding sheet)
12 Flexible tubular body (open tubular body)
14 Rotating device 15 Partition plate 15a Landfill opening (opening)
16a, 16b Air bag (sealing member)
17 Bottom plate 21 Hanging rod (suspending means)
22 Jack (suspension means)

Claims

A cylindrical body formed by a continuous underground wall and excavated inside, a bottom plate provided on the bottom of the cylindrical body, and an inner peripheral surface for partitioning the cylindrical body up and down with a predetermined clearance A partition plate, an opening formed in the partition plate, an open cylindrical body connected to the opening so as to communicate from below to the ground, and the partition plate can be moved up and down in the cylindrical body Suspending means for suspending and a sealing member provided on the outer periphery of the partition plate so as to be able to be enlarged and reduced in order to open and close the clearance. A waste storage structure characterized in that the upper and lower sides of the plate are filled with water.

The cylindrical body is formed in a substantially cylindrical shape, the partition plate is formed in a substantially circular shape, and rotating means for rotating the partition plate along the inner peripheral surface of the cylindrical body is provided. Item 1. A waste storage structure according to Item 1.

A hollow columnar body penetrating through the partition plate and the bottom plate and standing substantially at the center of the cylindrical body, and preventing leakage of water and waste from the inside of the bottom plate and the cylindrical body to the outside The waste storage structure according to claim 1, further comprising: a bottom layer, an inner surface of the cylindrical body, and a shielding layer provided on an outer surface of the columnar body.

A circular cylindrical body that reaches the support layer in the ground is formed by a continuous underground wall, a hollow columnar body is erected substantially at the center of the cylindrical body, and the inside is excavated to a predetermined depth. In order to prevent leakage of water and waste from the inside of the bottom plate and the cylindrical body to the outside by excavating the cylindrical body to a predetermined depth while pumping groundwater through the body Forming a shielding layer of the bottom plate and the inner surface of the cylindrical body, and the outer surface of the columnar body, after pouring a predetermined volume of water into the cylindrical body, stop the pumping of groundwater through the columnar body, After providing a communicating means for communicating the lower side and the ground to the partition plate for partitioning the cylindrical body up and down, the partition plate is set in the cylindrical body and supported at a predetermined height,
A method for constructing a storage structure, characterized in that a waste reclamation space surrounded by the cylindrical body and the bottom plate is provided below the partition plate via the shielding layer by the above steps.

A predetermined clearance between a circular cylindrical body formed by a continuous underground wall and excavated inside, a bottom plate provided at the bottom of the cylindrical body, and an inner peripheral surface for partitioning the cylindrical body vertically A circular partition plate arranged in the above, an opening formed in the partition plate, an open cylindrical body connected to the opening so as to communicate from below to the ground, and the partition plate in the cylindrical body Suspension means for suspending up and down in a movable manner, a sealing member provided on the outer periphery of the partition plate so as to be able to expand and contract in order to open and close the clearance, and the partition plate on the inner peripheral surface of the cylindrical body A rotating means that rotates along, a hollow columnar body that passes through the partition plate and the bottom plate and is erected substantially at the center of the cylindrical body, and water and water from the inside of the bottom plate and the cylindrical body to the outside. In order to prevent the waste from leaking, the bottom plate and the cylindrical body In addition, waste is disposed in a storage structure including a shielding layer provided on the outer surface of the columnar body, the inside of the opening tubular body, and water filled in the upper and lower sides of the partition plate in the tubular body. A landfill method,
After the clearance is closed with the sealing member, a container containing a slurry-like processed material kneaded with a solidified material in a waste incineration residue and placed in advance is placed under the partition plate through the opening cylindrical body. When the slurry-like processed material is buried here, and the slurry-like processed material is buried more than a predetermined amount, the partition plate is rotated by a predetermined angle by the rotating means, the container is suspended, and The landfill process of the slurry-like processed product and the rotation process of the partition plate are repeated as appropriate,
When a predetermined amount or more of the slurry-like processed material is filled in the whole area below the partition plate, the closure of the clearance by the sealing member is opened, the partition plate is raised by a predetermined height, and again with the sealing member A waste reclamation method, wherein the clearance is closed, and the step of hanging the container, the step of reclamating the slurry-like processed material, and the step of rotating the partition plate are repeated as appropriate.