JP2004351237A

JP2004351237A - Cleaning treatment system and method for contaminated soil

Info

Publication number: JP2004351237A
Application number: JP2003148281A
Authority: JP
Inventors: Yoshihiro Hoshino; 吉弘星野; Satoshi Sekino; 聡関野; Hisanori Hashimoto; 久儀橋本
Original assignee: Hitachi Construction Machinery Co Ltd
Current assignee: Hitachi Construction Machinery Co Ltd
Priority date: 2003-05-26
Filing date: 2003-05-26
Publication date: 2004-12-16

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently perform sufficient cleaning treatment without disturbing the operation of a factory. <P>SOLUTION: The cleaning treatment system is provided with: a pit excavating machine 200; a cave excavating machine 300 arranged at a pit H excavated by the pit excavating machine 200 having augers 14A and 14B with a length smaller than the diameter of the pit H provided with hollow holes 14r for sucking contaminants from contaminated soil as the object for cleaning treatment and excavating a cave L while successively adding a plurality of augers 14A and 14B; a self-travelling type vehicle 100 loaded with the pit excavating machine 200 and the cave excavating machine 300 and carrying them; and a suction/cleaning apparatus 600 arranged on the ground side at the outside of the pit H, connected to the hollow holes 14r of the augers 14A and 14B, and sucking and collecting contaminants in the contaminated soil via the hollow holes 14r. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、汚染土壌の浄化処理システム及び方法に関し、さらに詳しくは、工場の稼働を妨げることなく、効率的に十分な浄化処理を行える汚染土壌の浄化処理システム及び方法に関するものである。
【０００２】
【従来の技術】
近年、例えば、クリーニング用の洗浄液、半導体製造工程における洗浄液、その他工場等における油の洗浄液等から発生する揮発性有機化合物（例えばトリクロロエチレン、テトラクロロエチレン等のいわゆるＶＯＣ）による環境汚染の問題が提起されつつある。例えば、こうした揮発性有機化合物が、何らかの事情により漏出して土壌中へ混入された場合、その土壌が揮発性有機化合物により汚染され、更にこの汚染土壌がそのまま放置されてしまうと、自然浸透や雨水等により土壌深くに更に浸透し、いずれ地下水を汚染してしまう場合がある。
【０００３】
こうした汚染土壌を浄化処理する技術として、例えば、建造物近くに縦穴を掘削するとともにこの縦穴より横穴を掘削した後、軸方向多数箇所に開孔を備えた地下空気吸引用の開孔管をその横穴に挿入配置し、この開孔管の上記開孔より対象土壌から汚染物質を開孔管内に取り込むものがある（例えば、特許文献１参照）。開孔より開孔管内に取り込まれた汚染物質は、開孔管を介し地上側へと送られ、地上側に設けた汚染物質処理装置により浄化処理される。
【０００４】
【特許文献１】
特開平１１−１０１３０号公報（図５〜図７等）
【０００５】
【発明が解決しようとする課題】
上記従来技術には、以下の課題が存在する。
【０００６】
すなわち、上記従来技術では、縦穴を掘削した後にその縦穴から横穴の掘削を行うために、縦穴の直径を２ｍ以上の大径に確保するとしている。しかしながら、このような大径の縦穴を例えば工場敷地内において確保するのは容易ではなく、強いて設けようとすればその分のスペースを空けなければならない。このため、資材や機械の移動等が必要となって工場の稼働に影響を与え、甚だしい場合は一部稼働停止等となる可能性がある。
【０００７】
これを回避するためには、工場の敷地外に縦穴を設け、この縦穴から浄化処理対象の土壌まで長い横穴を掘削する方法も考えられる。しかしながら、この場合、工場下部に複雑に埋設された各種配管、ケーブル、地下ピット等の埋設物が障害となるため、場所によっては横穴を掘削するのが困難となる。また例えば、小規模な浄化対象領域が多数存在するような場合、各領域ごとに長い横穴を掘削しなければならないため非効率的であり、限られた施工期間内にそれら全部について細やかに十分な浄化処理を行うことは困難である。
【０００８】
本発明は、上記の事柄に基づいてなされたものであり、その目的は、工場の稼働を妨げることなく、効率的に十分な浄化処理を行える汚染土壌の浄化処理システム及び方法を提供することにある。
【０００９】
【課題を解決するための手段】
（１）上記目的を達成するために、本発明は、汚染土壌の浄化処理を行う汚染土壌の浄化処理システムにおいて、縦穴掘削機械と、この縦穴掘削機械で掘削した縦穴に配置され、浄化処理対象の汚染土壌より汚染物質を吸引するための中空孔を備え前記縦穴の径より小さい長さの掘削具を有し、複数本の前記掘削具を順次継ぎ足しながら横穴を掘進する横穴掘削機械とを備える。
【００１０】
本発明においては、縦穴掘削機械で縦穴を掘削した後、この縦穴に、縦穴の径より小さい長さの掘削具を有する横穴掘削機械を配置して、この横穴掘削機械においてその掘削具を複数本順次継ぎ足しながら横穴を掘進していく。そして、掘削具に設けた中空孔を介して汚染物質を吸引し、例えば地上側に設けた処理手段で浄化処理を行う。
【００１１】
このように、短尺の掘削具を継ぎ足して横穴を掘削しかつその掘削具を介し汚染物質の吸引を行う構成とすることにより、例えば、掘削具を地上側で取り付けた横穴掘削機械を縦穴の中に降下させた後は、地上よりの遠隔操作で掘削具を回転させて所定距離の横穴を掘削させ、さらに掘削後も同様に地上よりの遠隔操作で掘削具を横穴掘削機械から離脱して横穴内に残置し、横穴掘削機械を縦穴上に引き上げるといったことが可能となる。これにより、作業員が縦穴内に入坑することなく横穴掘削及び汚染物質の吸引を行うことができるので、従来技術に比べて縦穴の径を大幅に縮小し、例えば数十センチ程度にすることが可能となる。この結果、工場の稼働に影響を与えることなく、比較的容易に工場敷地内において縦穴施工スペースを確保することができる。また例えば、小規模な浄化対象領域が多数存在するような場合であっても、各領域の至近に縦穴を掘削してこの縦穴より短い横穴で容易に到達することができるので、短い施工期間内にそれら全部について効率よく細やかに十分な浄化処理を行うことができる。
【００１２】
（２）上記目的を達成するために、本発明は、汚染土壌の浄化処理を行う汚染土壌の浄化処理システムにおいて、縦穴掘削機械と、この縦穴掘削機械で掘削した縦穴に配置され、浄化処理対象の汚染土壌より汚染物質を吸引するための中空孔を備え前記縦穴の径より小さい長さの掘削具を有し、複数本の前記掘削具を順次継ぎ足しながら横穴を掘進する横穴掘削機械と、前記縦穴掘削機械及び前記横穴掘削機械を積載し運搬する自走式車輌とを備える。
【００１３】
（３）上記（１）又は（２）のいずれかにおいて、好ましくは、前記縦穴外の地上側に配置されて前記掘削具の中空孔に接続され、前記中空孔を介し前記汚染土壌内の汚染物質を吸引し収集する吸引機械をさらに備える。
【００１４】
（４）上記（３）において、さらに好ましくは、前記吸引機械で吸引収集された汚染物質を浄化処理する処理手段をさらに備える。
【００１５】
（５）また上記目的を達成するために、本発明は、汚染土壌の浄化処理を行う汚染土壌の浄化処理システムにおいて、縦穴掘削機械と、この縦穴掘削機械で掘削した縦穴に配置され、前記縦穴の径より小さい長さの掘削具を有し、複数本の前記掘削具を順次継ぎ足しながら横穴を掘進する横穴掘削機械と、前記縦穴又は前記横穴又は前記横穴に挿入配置した配管に気密に接続され、浄化処理対象の汚染土壌より前記横穴又は前記配管を介し取り込んだ汚染物質を吸引する吸引手段とを備える。
【００１６】
本発明においては、縦穴掘削機械で縦穴を掘削した後、この縦穴に、縦穴の径より小さい長さの掘削具を有する横穴掘削機械を配置して、この横穴掘削機械においてその掘削具を複数本順次継ぎ足しながら横穴を掘進していく。そして、例えば掘削具を横穴より抜き去りかつ横穴掘削機械を縦穴より取り出した後、縦穴、又は横穴、もしくは横穴に挿入配置した配管に吸引手段を気密に接続し、横穴又は配管に汚染物質を取り込んで吸引し、例えば地上側に設けた処理手段で浄化処理を行う。
【００１７】
このように、短尺の掘削具を継ぎ足して横穴を掘削した後に吸引手段で汚染物質の吸引を行う構成とすることにより、例えば、掘削具を地上側で取り付けた横穴掘削機械を縦穴の中に降下させた後は、地上よりの遠隔操作で掘削具を回転させて所定距離の横穴を掘削させ、さらに掘削後も同様に地上よりの遠隔操作で掘削具を横穴掘削機械から離脱して横穴内に残置し、横穴掘削機械を縦穴上に引き上げるといったことが可能となる。これにより、作業員が縦穴内に入坑することなく横穴掘削及び汚染物質の吸引を行うことができるので、従来技術に比べて縦穴の径を大幅に縮小し、例えば数十センチ程度にすることが可能となる。この結果、工場の稼働に影響を与えることなく、比較的容易に工場敷地内において縦穴施工スペースを確保することができる。また例えば、小規模な浄化対象領域が多数存在するような場合であっても、各領域の至近に縦穴を掘削してこの縦穴より短い横穴で容易に到達することができるので、短い施工期間内にそれら全部について効率よく細やかに十分な浄化処理を行うことができる。
【００１８】
（６）また上記目的を達成するために、本発明は、汚染土壌の浄化処理を行う汚染土壌の浄化処理システムにおいて、縦穴掘削機械と、この縦穴掘削機械で掘削した縦穴に配置され、前記縦穴の径より小さい長さの掘削具を有し、複数本の前記掘削具を順次継ぎ足しながら横穴を掘進する横穴掘削機械と、前記縦穴又は前記横穴又は前記横穴に挿入配置した配管に気密に接続され、浄化処理対象の汚染土壌より前記横穴又は前記配管を介し取り込んだ汚染物質を吸引する吸引手段と、前記縦穴掘削機械、前記横穴掘削機械、及び前記吸引手段を積載し運搬する自走式車輌とを備える。
【００１９】
（７）上記（２）又は（６）において、好ましくは、前記自走式車輌に配置される旋回支持台と、この旋回支持台に旋回可能に支持される水平伸縮アームと、この水平伸縮アームに設けた垂直伸縮アームとを備え、前記縦穴掘削機械は、前記垂直伸縮アームに着脱可能に設けられる。
【００２０】
（８）上記（１）、（２）、（５）、（６）のうちいずれかにおいて、また好ましくは、前記縦穴掘削機械で掘削した縦穴内を昇降し、前記横穴掘削機械を搭載する昇降フレームを備え、前記横穴掘削機械は、前記昇降フレームに設けられ、前記掘削具を回転させる回転駆動装置と、前記回転駆動装置を前後に往復動させる横行装置とを有する。
【００２１】
（９）上記（８）において、さらに好ましくは、先行の前記掘削具の後端側掴み部を把持する複数個の把持用爪を有する固定チャック装置と、後行の前記掘削具の後端側掴み部を把持する複数個の把持用爪を有し、前記回転駆動装置により回転される回転チャック装置とを有する。
【００２２】
（１０）上記（５）又は（６）において、また好ましくは、前記吸引手段で吸引収集された汚染物質を浄化処理する処理手段をさらに備える。
【００２３】
（１１）上記目的を達成するために、本発明の汚染土壌の浄化処理方法は、縦穴掘削機械で縦穴を掘削し、前記縦穴の径より小さい長さの着脱式の掘削具を備えた横穴掘削機械を縦穴の中に配置し、前記横穴掘削機械で複数本の前記掘削具を順次継ぎ足しながら回転させ横穴を掘削した後、前記掘削具の非回転状態で前記掘削具に設けた中空孔を介し汚染土壌中の汚染物質を吸引し前記縦穴外の地上側にて収集する。
【００２４】
（１２）また上記目的を達成するために、本発明の汚染土壌の浄化処理方法は、縦穴掘削機械で縦穴を掘削し、前記縦穴の径より小さい長さの着脱式の掘削具を取り付けた横穴掘削機械を縦穴の中に降下させ、前記横穴掘削機械を地上より操作して前記掘削具を回転させてその掘削具の長さに対応した所定距離の横穴を掘削し、前記横穴掘削機械を地上より操作して前記掘削具の回転を停止させ、前記横穴掘削機械を地上より操作して前記掘削具を前記横穴掘削機械から離脱して前記横穴内に残置し、前記横穴掘削機械を前記縦穴上に引き上げ、前記横穴内に残置した掘削具に接続する新たな掘削具を前記引き上げた横穴掘削機械に装着し、この横穴掘削機械を再び前記縦穴内に降下させて、前記横穴掘削機械を地上より操作して前記新たな掘削具を前記横穴内に残置した掘削具に接続し、前記横穴掘削機械を地上より操作して前記新たな掘削具及び前記残置した掘削具を回転させて前記新たな掘削具の長さに対応した所定距離の横穴を掘削し、前記横穴掘削機械を地上より操作して前記回転を停止させ、その停止した状態で、前記横穴掘削機械を地上より操作して前記新たな掘削具を前記横穴掘削機械から離脱して前記横穴内に残置し、以降、上記同様にして、さらに新たな掘削具を継ぎ足していき、所定の範囲の汚染土壌中に複数の掘削具を貫通延設させ、それら複数の掘削具の非回転状態で、前記複数の掘削具のうち少なくとも１つの表面に設けた採取孔及び前記採取孔に連通するように前記掘削具に設けた中空孔を介し、前記採取孔周囲の汚染土壌中の汚染物質を吸引し前記縦穴外の地上側にて収集する。
【００２５】
（１３）また上記目的を達成するために、本発明は、建造物の下方に位置する所定範囲内の汚染土壌の汚染物質を浄化処理する汚染土壌の浄化処理方法において、前記建造物内に縦穴掘削機械を搬入して前記建造物内にて縦穴を掘削し、前記縦穴の径より小さい長さの着脱式の掘削具を取り付けた横穴掘削機械を縦穴の中に降下させ、前記横穴掘削機械を前記建造物内の地上側より操作して前記掘削具を回転させてその掘削具の長さに対応した所定距離の横穴を掘削し、前記横穴掘削機械を前記建造物内の地上側より操作して前記掘削具の回転を停止させ、前記横穴掘削機械を前記建造物内の地上側より操作して前記掘削具を前記横穴掘削機械から離脱して前記横穴内に残置し、前記横穴掘削機械を前記縦穴上に引き上げ、前記横穴内に残置した掘削具に接続する新たな掘削具を前記引き上げた横穴掘削機械に装着し、この横穴掘削機械を再び前記縦穴内に降下させて、前記横穴掘削機械を前記建造物内の地上側より操作して前記新たな掘削具を前記横穴内に残置した掘削具に接続し、前記横穴掘削機械を前記建造物内の地上側より操作して前記新たな掘削具及び前記残置した掘削具を回転させて前記新たな掘削具の長さに対応した所定距離の横穴を掘削し、前記横穴掘削機械を前記建造物内の地上側より操作して前記回転を停止させ、その停止した状態で、前記横穴掘削機械を前記建造物内の地上側より操作して前記新たな掘削具を前記横穴掘削機械から離脱して前記横穴内に残置し、以降、上記同様にして、さらに新たな掘削具を継ぎ足していき、所定の範囲の汚染土壌中に複数の掘削具を貫通延設させ、それら複数の掘削具の非回転状態で、前記複数の掘削具のうち少なくとも１つの表面に設けた採取孔及び前記採取孔に連通するように前記掘削具に設けた中空孔を介し、前記採取孔周囲の汚染土壌中の汚染物質を吸引し前記縦穴外の地上側にて収集する。
【００２６】
（１４）また上記目的を達成するために、本発明の汚染土壌の浄化処理方法は、縦穴掘削機械で縦穴を掘削し、前記縦穴の径より小さい長さの着脱式の掘削具を備えた横穴掘削機械を縦穴の中に配置し、前記横穴掘削機械で複数本の前記掘削具を順次継ぎ足しながら回転させ横穴を掘削した後、前記掘削具を前記掘削した横穴より抜き去るとともに前記横穴掘削機械を前記縦穴より取り出し、前記縦穴又は前記横穴に吸引手段を気密に接続し、浄化処理対象の汚染土壌より前記横穴を介し取り込んだ汚染物質を地上側に吸引し収集する。
【００２７】
（１５）また上記目的を達成するために、本発明の汚染土壌の浄化処理方法は、縦穴掘削機械で縦穴を掘削し、前記縦穴の径より小さい長さの着脱式の掘削具を取り付けた横穴掘削機械を縦穴の中に降下させ、前記横穴掘削機械を地上より操作して前記掘削具を回転させてその掘削具の長さに対応した所定距離の横穴を掘削し、前記横穴掘削機械を地上より操作して前記掘削具の回転を停止させ、前記横穴掘削機械を地上より操作して前記掘削具を前記横穴掘削機械から離脱して前記横穴内に残置し、前記横穴掘削機械を前記縦穴上に引き上げ、前記横穴内に残置した掘削具に接続する新たな掘削具を前記引き上げた横穴掘削機械に装着し、この横穴掘削機械を再び前記縦穴内に降下させて、前記横穴掘削機械を地上より操作して前記新たな掘削具を前記横穴内に残置した掘削具に接続し、前記横穴掘削機械を地上より操作して前記新たな掘削具及び前記残置した掘削具を回転させて前記新たな掘削具の長さに対応した所定距離の横穴を掘削し、前記横穴掘削機械を地上より操作して前記回転を停止させ、その停止した状態で、前記横穴掘削機械を地上より操作して前記新たな掘削具を前記横穴掘削機械から離脱して前記横穴内に残置し、以降、上記同様にして、さらに新たな掘削具を継ぎ足していき、所定の範囲の汚染土壌中に複数の掘削具を貫通延設させた後、前記複数の掘削具を掘削した横穴より抜き去るとともに前記横穴掘削機械を前記縦穴より取り出し、前記縦穴又は前記横穴に吸引手段を気密に接続し、浄化処理対象の汚染土壌より前記横穴を介し取り込んだ汚染物質を地上側に吸引し収集する。
【００２８】
（１６）また上記目的を達成するために、本発明の汚染土壌の浄化処理方法は、縦穴掘削機械で縦穴を掘削し、前記縦穴の径より小さい長さの着脱式の掘削具を取り付けた横穴掘削機械を縦穴の中に降下させ、前記横穴掘削機械を前記建造物内の地上側より操作して前記掘削具を回転させてその掘削具の長さに対応した所定距離の横穴を掘削し、前記横穴掘削機械を前記建造物内の地上側より操作して前記掘削具の回転を停止させ、前記横穴掘削機械を前記建造物内の地上側より操作して前記掘削具を前記横穴掘削機械から離脱して前記横穴内に残置し、前記横穴掘削機械を前記縦穴上に引き上げ、前記横穴内に残置した掘削具に接続する新たな掘削具を前記引き上げた横穴掘削機械に装着し、この横穴掘削機械を再び前記縦穴内に降下させて、前記横穴掘削機械を前記建造物内の地上側より操作して前記新たな掘削具を前記横穴内に残置した掘削具に接続し、前記横穴掘削機械を前記建造物内の地上側より操作して前記新たな掘削具及び前記残置した掘削具を回転させて前記新たな掘削具の長さに対応した所定距離の横穴を掘削し、前記横穴掘削機械を前記建造物内の地上側より操作して前記回転を停止させ、その停止した状態で、前記横穴掘削機械を前記建造物内の地上側より操作して前記新たな掘削具を前記横穴掘削機械から離脱して前記横穴内に残置し、以降、上記同様にして、さらに新たな掘削具を継ぎ足していき、所定の範囲の汚染土壌中に複数の掘削具を貫通延設させた後、前記複数の掘削具を掘削した横穴より抜き去るとともに前記横穴掘削機械を前記縦穴より取り出し、前記縦穴又は前記横穴に吸引手段を気密に接続し、浄化処理対象の汚染土壌より前記横穴を介し取り込んだ汚染物質を地上側に吸引し収集する。
【００２９】
（１７）また上記目的を達成するために、本発明の汚染土壌の浄化処理方法は、縦穴掘削機械で縦穴を掘削し、前記縦穴の径より小さい長さの着脱式の掘削具を備えた横穴掘削機械を縦穴の中に配置し、前記横穴掘削機械で複数本の前記掘削具を順次継ぎ足しながら回転させ横穴を掘削した後、前記掘削具を前記掘削した横穴より抜き去るとともに前記横穴掘削機械を前記縦穴より取り出し、前記横穴に、浄化処理対象の汚染土壌領域に開孔を備えた配管を挿入配置し、前記縦穴又は前記配管に吸引手段を気密に接続し、前記汚染土壌領域より前記開孔を介し取り込んだ汚染物質を地上側に吸引し収集する。
【００３０】
（１８）また上記目的を達成するために、本発明の汚染土壌の浄化処理方法は、縦穴掘削機械で縦穴を掘削し、前記縦穴の径より小さい長さの着脱式の掘削具を取り付けた横穴掘削機械を縦穴の中に降下させ、前記横穴掘削機械を地上より操作して前記掘削具を回転させてその掘削具の長さに対応した所定距離の横穴を掘削し、前記横穴掘削機械を地上より操作して前記掘削具の回転を停止させ、前記横穴掘削機械を地上より操作して前記掘削具を前記横穴掘削機械から離脱して前記横穴内に残置し、前記横穴掘削機械を前記縦穴上に引き上げ、前記横穴内に残置した掘削具に接続する新たな掘削具を前記引き上げた横穴掘削機械に装着し、この横穴掘削機械を再び前記縦穴内に降下させて、前記横穴掘削機械を地上より操作して前記新たな掘削具を前記横穴内に残置した掘削具に接続し、前記横穴掘削機械を地上より操作して前記新たな掘削具及び前記残置した掘削具を回転させて前記新たな掘削具の長さに対応した所定距離の横穴を掘削し、前記横穴掘削機械を地上より操作して前記回転を停止させ、その停止した状態で、前記横穴掘削機械を地上より操作して前記新たな掘削具を前記横穴掘削機械から離脱して前記横穴内に残置し、以降、上記同様にして、さらに新たな掘削具を継ぎ足していき、所定の範囲の汚染土壌中に複数の掘削具を貫通延設させた後、前記複数の掘削具を掘削した横穴より抜き去るとともに前記横穴掘削機械を前記縦穴より取り出し、前記横穴に、浄化処理対象の汚染土壌領域に開孔を備えた配管を挿入配置し、前記縦穴又は前記配管に吸引手段を気密に接続し、浄化処理対象の汚染土壌より前記横穴を介し取り込んだ汚染物質を地上側に吸引し収集する。
【００３１】
（１９）また上記目的を達成するために、本発明の汚染土壌の浄化処理方法は、縦穴掘削機械で縦穴を掘削し、前記縦穴の径より小さい長さの着脱式の掘削具を取り付けた横穴掘削機械を縦穴の中に降下させ、前記横穴掘削機械を前記建造物内の地上側より操作して前記掘削具を回転させてその掘削具の長さに対応した所定距離の横穴を掘削し、前記横穴掘削機械を前記建造物内の地上側より操作して前記掘削具の回転を停止させ、前記横穴掘削機械を前記建造物内の地上側より操作して前記掘削具を前記横穴掘削機械から離脱して前記横穴内に残置し、前記横穴掘削機械を前記縦穴上に引き上げ、前記横穴内に残置した掘削具に接続する新たな掘削具を前記引き上げた横穴掘削機械に装着し、この横穴掘削機械を再び前記縦穴内に降下させて、前記横穴掘削機械を前記建造物内の地上側より操作して前記新たな掘削具を前記横穴内に残置した掘削具に接続し、前記横穴掘削機械を前記建造物内の地上側より操作して前記新たな掘削具及び前記残置した掘削具を回転させて前記新たな掘削具の長さに対応した所定距離の横穴を掘削し、前記横穴掘削機械を前記建造物内の地上側より操作して前記回転を停止させ、その停止した状態で、前記横穴掘削機械を前記建造物内の地上側より操作して前記新たな掘削具を前記横穴掘削機械から離脱して前記横穴内に残置し、以降、上記同様にして、さらに新たな掘削具を継ぎ足していき、所定の範囲の汚染土壌中に複数の掘削具を貫通延設させた後、前記複数の掘削具を掘削した横穴より抜き去るとともに前記横穴掘削機械を前記縦穴より取り出し、前記横穴に、浄化処理対象の汚染土壌領域に開孔を備えた配管を挿入配置し、前記縦穴又は前記配管に吸引手段を気密に接続し、浄化処理対象の汚染土壌より前記横穴を介し取り込んだ汚染物質を地上側に吸引し収集する
【００３２】
（２０）上記（１１）乃至（１９）のいずれかにおいて、また好ましくは、前記収集した汚染物質を、前記縦穴外の地上側に設けた処理手段により浄化処理する。
【００３３】
【発明の実施の形態】
以下、本発明の汚染土壌の浄化処理方法及びこれを実施する汚染土壌の浄化処理システムの実施の形態を図面を参照しつつ説明する。
【００３４】
まず、本発明の第１の実施の形態を図１〜図１６により説明する。
【００３５】
本実施の形態による汚染土壌の浄化処理方法は、例えば、工場等の産業建造物内に配置され実際に稼働している汚染源（例えば工作機械等の産業機械）より生じたクリーニング用の洗浄液、半導体製造工程における洗浄液、その他油の洗浄液等から発生する揮発性有機化合物（例えばトリクロロエチレン、テトラクロロエチレン等のいわゆるＶＯＣ）や、六価クロムやカドミウム等といった重金属系の物質（以下適宜、汚染物質と総称する）により汚染された土壌に対し本発明を適用し、建造物内において当該汚染源のすぐ近傍にて縦穴を掘削して浄化処理を行う場合の実施の形態である。本実施の形態における浄化処理手順は、大別して、掘削機械を浄化処理現場まで運搬する工程と、縦穴を掘削する工程と、横穴を掘削する工程と、汚染物質を吸引収集する工程とを含んでいる。以下、そのシステム構成及び詳細手順を説明する。
【００３６】
（１）掘削機械等の運搬
本実施の形態においては、浄化処理を行うのに必要な機械・設備の全部又は大部分を、自走式車輌に積載しその浄化処理現場まで運搬する。
【００３７】
図１は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において上記自走式車輌による機械・設備の運搬時の様子を表す図である。図１において、１００は運搬を行う自走式車輌（この例ではトラック）、２００は縦穴掘削機械、３００は横穴掘削機械、４００は縦穴掘削時において縦穴掘削機械２００を先端部に取り付け自走式車輌１００に対して支持する支持機構である。
【００３８】
図１に示すように、この運搬時においては、支持機構４００は、後述する伸長状態と異なり最も収縮され、かつ縦穴掘削機械２００の取り付け側（後述の垂直伸縮アーム４２３側）を車輌前方側に向けた状態で搭載されている。なお、自走式車輌１００は、後述するように縦穴掘削予定地である作業機械近くまでの乗り入れを可能とするために、この例では比較的小型のトラックとなっている。
【００３９】
（２）縦穴の掘削
（２−１）表層の切削
縦穴を掘削する前に、通常、掘削予定地の表面を覆っている表層（例えばコンクリート、アスファルト層等）の切削を行う。
【００４０】
図２は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において上記切削時の様子を表す側断面図である。この例では、図示を省略しているが、工場の建屋内あるいはその近傍に自走式車輌１００を乗り入れ、建屋内の作業機械の近傍（直下）に存在するとみられる汚染土壌領域を浄化処理する場合の例を示している（後述の図１４参照）。
【００４１】
図２において、上記自走式車輌１００を、縦穴掘削予定位置に合わせてセットしたら、アウトリガー１０２（図示せず。後述の図４等を参照）を伸ばしてその下端部を接地させ、これによって自走式車輌１００を対地固定する。
【００４２】
ここで、上記支持機構４００の詳細を説明する。
【００４３】
図２において、４２１は自走式車輌１００の荷台１０１上に設置した旋回支持台である。この旋回支持台４２１は、荷台１０１に固定された筒状支持台４２１ａと、この筒状支持台４２１ａ上に設置され、旋回モータ４２１ｃ（図示せず、後述の図４参照）により被旋回側を旋回させる旋回輪４２１ｂとを備える。
【００４４】
４２２は水平伸縮アームであり、この水平伸縮アーム４２２は、上記旋回輪４２１ｂの被旋回側に固定された筒状の外アーム４２２ａと、この外アーム４２２ａ内に摺動可能に挿着された長尺の内アーム４２２ｂとを備える。そして、外アーム４２２ａに取り付けた油圧式伸縮モータ４２２ｄ（図示せず、後述の図４参照）により回転されるピニオン４２２ｅ（同）と、内アーム４２２ｂに取り付けたラック４２２ｃ（同）とを噛合させ、伸縮モータ４２２ｄを作動させることにより、内アーム４２２ｂが外アーム４２２ａ内を移動するように構成されている。また、この水平伸縮アーム４２２は、前述した旋回輪４２１ｂにより、後ろ向きないしは後述の図３にθで示す若干の角度範囲だけ回動できるように構成されている。
【００４５】
４２３は垂直伸縮アームであり、この垂直伸縮アーム２４３は、上記内アーム４２２ｂの先端に上下向きに固設された筒状の外アーム４２３ａと、この外アーム４２３ａ内に摺動可能に挿着された筒状の中アーム４２３ｂと、この中アーム４２３ｂ内に摺動可能に装着された筒状の内アーム４２３ｃとを備えている。このとき、外アーム４２３ａと中アーム４２３ｂの各下端部にはそれぞれピニオン４２３ｄ，４２３ｅ（図示せず、後述の図４参照）を有する油圧式伸縮モータ４２３ｆ，４２３ｇ（同）を取付け、中アーム４２３ｂと内アーム４２３ｃにはそれぞれ上記ピニオン４２３ｄ，４２３ｅに噛合するラック４２３ｈ，４２３ｉ（同）を取付け、上記伸縮モータ４２３ｆ，４２３ｇを作動させることによって中アーム４２３ｂ及び内アーム４２３ｃが上下に移動するように構成されている。
【００４６】
以上のような構成の支持機構４００に対し、この表層切削時においては、上記内アーム４２３ｃの下端に、縦穴掘削機械２００が例えばボルト付け等により着脱可能に取り付けられる。このときの縦穴掘削機械２００としては、表層を切削（掘削）するための回転式掘削機（ホールソー）２００Ａ等が好適である。ホールソー２００Ａを内アーム４２３ｃに取り付ける際には、後述の図４中Ａの状態で示すように、水平伸縮アーム４２２を収縮させ、かつ垂直伸縮アーム４２３を収縮させると共に、垂直伸縮アーム４２３が目的とする用具（この場合はホールソー２００Ａ）の上に位置するように旋回モータ４２１ｃを作動させて水平伸縮アーム４２２を回動させ、垂直伸縮アーム４２３にホールソー２００Ａを取り付けるか又はフック等を利用して吊下げ、所定の場所まで移動させる。図３は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において上記水平伸縮アームの回動時の様子を表す平面図である。この場合、旋回輪４２１による左右の旋回最大角は、θに示すように比較的小さいものとなる。
【００４７】
ホールソー２００Ａは、詳細な図示を省略するが、円弧状に形成した切削用の鋸歯を備え、外径が略円形の刃物体と、これを駆動する油圧モータとを備えており、図２に示す内アーム４２３ｃへの取付け状態にて下端となる上記刃物体を対象領域の表層に接しつつ上記油圧モータを回転駆動することにより、表層を削り取り、縦穴に対応する径（例えば５０ｃｍ程度の比較的小径）の孔をあけていく。
（２−２）縦穴本体の掘削
上記のようにして表層の切削が終了したら、縦穴本体の掘削を行う。
【００４８】
図４は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において上記縦穴の掘削時の様子を表す側断面図である。
【００４９】
図４において、表層切削終了した後には、内アーム４２３ｃの先端に取り付けたホールソー２００Ａを引き上げて取り外し、縦穴掘削用の縦穴掘削機械２００として、回転式掘削機の一種であるアースドリル（図示せず）を取り付ける。このときの取付け方法は例えば前述したホールソー２００Ａと同様、水平伸縮アーム４２２及び垂直伸縮アーム４２３を作動させて行えば足りる。
【００５０】
アースドリルは、図示を省略するが、先端部に地山掘削用のビットを備えた外径略円形の回転円筒体と、これを駆動する油圧モータとを備えており、ホールソー２００Ａ同様、上記ビットを対象領域の地盤（地山）に押し付けつつ上記油圧モータを回転駆動することにより、地山に前述した径（例えば５０ｃｍ程度の比較的小径）の縦穴Ｈ１を掘削していく。なお、アースドリルに代えて、縦穴掘削機械２００として、開閉動作により地山をすくい込んで掘削する公知の掘削バケット（長柄バケット）２００Ｂを用い、これによって縦穴Ｈ１を掘削してもよい（あるいは両者を併用してもよい）。図４は、掘削バケット２００Ｂを用いて縦穴Ｈ１を掘削している状態を一例として示している。
【００５１】
このようにして縦穴Ｈ１を掘削していくとき、周辺環境を損なうのを防止するために、所定深さを掘削するごとに、ケーシングＳの建て込みを行う。このケーシングＳは、例えば前述の自走式車輌１００の荷台１０１に積載して運搬し、先のホールソー２００Ａ、アースドリル、掘削バケット２００Ｂと同様に、水平伸縮アーム４２２及び垂直伸縮アーム４２３を作動させて縦穴Ｈ１への搬入を行えば足りる。
【００５２】
以上のようにして、縦穴の掘削を行うが、通常は、深さ方向に所定間隔にて汚染物質の吸引浄化処理を行うため、当該所定深さを掘削したら、一旦縦穴掘削を中断し、その深さから横穴掘削を行う。
（３）横穴の掘削及び地中物質の吸引浄化処理
上記のようにして縦穴の掘削を中断したら、水平伸縮アーム４２２及び垂直伸縮アーム４２３を適宜作動させて、ホールソー２００Ａ、アースドリル、掘削バケット２００Ｂを縦穴Ｈ１より地上側へと搬出する。代わりに、横穴掘削機械３００を縦穴Ｈ１の底部（中断時点での底部）に搬入して縦穴Ｈ１より横穴の掘削を行う。
（３−１）横穴掘削機械の詳細構成
横穴掘削機械３００の詳細構成についてまず説明する。
【００５３】
図５は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において用いる上記横穴掘削機械３００の構成を表す正面図であり、図６は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において用いる上記横穴掘削機械３００の構成を表す側断面図である。但し、図５及び図６においては、装置全体の構成の明確化のために、横穴掘削機械３００の周辺構造や縦穴についても併せて図示している。特に、後述のように本実施形態では縦穴は所定深さごとに掘削を中断してその都度横穴を掘削していくものであるが、これら図５及び図６では、理解の容易のために、最終的に最深部まで縦穴を掘削完了した場合を例にとって図示している。
【００５４】
また、図７は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において用いる上記横穴掘削機械３００の詳細構成を表す水平断面図である。
【００５５】
これら図５、図６、及び図７において、横穴掘削機械３００は縦穴Ｈ１にはめ込んだ上記ケーシングＳに昇降自在に装着されている。すなわち、ケーシングＳ及びケーシングＳ上に設置した操作装置５（詳細は後述）のフレーム８には、対向するように２本のガイドレール７が設けてある。横穴掘削機械３００を構成する門形フレーム９の左・右の柱部の上・下には、上記ガイドレール７に沿って転動させるガイドローラ１０が取り付けてある。また、門形フレーム９の下部にはガイド枠１１が取り付けられている。
【００５６】
このガイド枠１１には、ケーシングＳに設けた開口部１２（図７参照）に向かうように、平行をなすガイドレール１３が固設され、掘削具としてのオーガ１４（詳細構造は後述）を回転駆動させる回転駆動装置１５は、その左右に２個ずつ取り付けられたガイドローラ１６が上記ガイドレール１３に沿って転動自在に係合されることにより、ガイド枠１１上に移動自在に設置される。回転駆動装置１５は、前部にオーガ１４（詳細は後述）の尾端１４ａを把持する回転チャック装置１７を有し、かつオーガ１４を回転させる回転用油圧モータ１８を有する。
【００５７】
図８は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において横穴掘削機械３００を構成する上記回転駆動装置１５の内部構成を表す側断面図である。この図８において、オーガ回転用油圧モータ１８の出力軸に取り付けた駆動歯車３０は、ケース３１に回転自在に取り付けた受歯車３２と噛合させ、この受歯車３２は、ケース３１内に回転自在に取り付けたチャック爪開閉用油圧シリンダ３３のチューブ３４の先端に結合されている。
【００５８】
受歯車３２には、ボルト３７によりチャック爪保持ブロック３８が結合され、このブロック３８には、３個のチャック爪３９が放射状に開閉自在に装着されている。チャック爪保持ブロック３８内には、上記油圧シリンダ３３の軸心方向に摺動自在に摺動ブロック４０が収容されており、この摺動ブロック４０の周囲に設けた傾斜溝４０ａを上記各チャック爪３９の逆Ｔ字形傾斜摺動脚３９ａに摺動自在に係合させている。
【００５９】
この摺動ブロック４０は、油圧シリンダ３３のピストン３５に結合されたピストンロッド３６に結合されており、油圧モータ１８の回転によって油圧シリンダ３３及びチャック爪３９等からなる回転チャック装置１７が回転し、また、油圧シリンダ３３の伸縮によって摺動ブロックが動き、チャック爪３９が開閉するように構成されている。
【００６０】
図５、図６、及び図７に戻り、回転駆動装置１５の側部には、回転駆動装置１５を往復動させる横行用油圧モータ１９が設けられ、この横行用油圧モータ１９の出力軸に取り付けたピニオン２０を上記ガイドレール１３に平行に設けたラックに噛合させ、油圧モータ１９の回転により回転駆動装置１５が往復動するように構成されている。
【００６１】
また、２２はガイド枠１１の前部に取り付けられた固定チャック装置である。この固定チャック装置２２は、オーガ１４を抜き取る際、さらに必要であればオーガ継ぎ足しの際に一部が埋没している先行オーガ１４の尾端（後端）１４ａを把持しておくものである。固定チャック装置２２は、オーガ１４の尾端を把持、解放可能となるように開閉自在に取り付けられた一対の爪２３，２４と、左右の開閉用油圧シリンダ２５，２６と、これら開閉用油圧シリンダ２５，２６の各ピストンロッドの動きを上記爪２３，２４にそれぞれ伝達するリンク機構２７，２８とを備えている。
【００６２】
図９は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において横穴掘削機械３００の掘削具を構成するオーガ１４の詳細構造を表す側面図であり、図１０は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において横穴掘削機械３００の掘削具を構成するオーガ１４の詳細構造を表す分解縦断面図である。
【００６３】
これら図９及び図１０において、オーガ１４は、雄雌ねじ式に順次継ぎ足しながら横穴を掘進する構造となっており、詳細には、先端部に掘削ビット１４Ｚを取り付けるオーガ１４Ａと、その後部に順次結合されていくオーガ１４Ａ，１４Ａ（又は図９中下段に示すオーガ１４Ｂ、以降同様），１４Ａ，…とから構成されている。
【００６４】
各オーガ１４Ａ，１４Ｂは、その尾端１４ａが雌ねじに形成され、先端１４ｂはその雌ねじに螺合する雄ねじに形成されており、これによって上記のような順次ねじ込まれる結合構造を可能としている。なお、最前方側のオーガ１４Ａの先端（雄ねじ部）１４ｂは、掘削ビット１４Ｚに設けた雌ねじ部１４ｚ内にねじ込まれて固定される。
【００６５】
また、各オーガ１４Ａ，１４Ｂは、略円筒状の本体部１４ｐと、この本体部１４ｂの外周側に螺旋状に設けられた排土用のスクリュー部１４ｑとを備えている。このとき、本体部１４ｐの径方向中心側には、軸方向に中空孔１４ｒが形成されており、各オーガ１４Ａ，１４Ｂの締結結合時には、互いの中空孔１４ｒが互いに連通し、後述する汚染物質の吸引通路を形成するようになっている。また、オーガ１４Ａの中空孔１４ｒの軸方向多数箇所からは、径方向外周側へと放射状に多数の連通孔（採取孔）１４ｓが設けられ、径方向外周側終端部において本体部１４ｐの（言い換えればオーガ１４Ａ）の外周側へと露出して、後述するようにこの連通孔１４ｓより近傍の汚染物質を吸引取り込み可能な構造となっている。
【００６６】
また、図示を省略するが、オーガ１４の継ぎ足し部にゴム等からなるシール手段（例えばＯリング）が介設される。これにより、オーガ１４を継ぎ足した状態では、先行オーガ１４の尾端１４ａと後行オーガ１４の先端１４ｂとの間でそのシール手段が挟持されてシール作用が発揮され、上記中空孔１４ｒどうしの連通状態を確保するとともに、漏れを防止するようになっている。
【００６７】
なお、これらオーガ１４Ａ，１４Ｂの一本の軸方向の長さは、縦穴Ｈ１の直径よりも小さい長さとなっている。
【００６８】
図１１は、図８に示した、本発明の汚染土壌の浄化処理方法の第１の実施の形態において横穴掘削機械３００を構成する上記回転駆動装置１５を前方側（図８中左側から）みた正面図である。
【００６９】
図１１及び図８において、前述したチャック爪保持ブロック３８には、ボルト３７により受け盤５４が固定されている。この受け盤５４は、チャック爪保持ブロック３８と同様にチャック爪３９を移動させる溝を有しており、その中央には、オーガ１４の尾端の雌ねじ孔を嵌合する円筒状の取り付け筒５５を一体に有している。この取り付け筒５５の根元部周囲には、ゴム等からなるシールリング５６が嵌合してあり、回転チャック装置１７に把持されているオーガ１４の尾端と取り付け筒５５との間でシールリング５６が挟持されてシール作用が発揮されるようになっている。
【００７０】
再び、図５、図６、及び図７に戻り、一方、操作装置５は、オーガ回転用油圧モータ１８、チャック爪開閉用油圧シリンダ３３、及び固定チャック装置２２の油圧シリンダ２５，２６を操作するスイッチ類からなる操作盤４２と、横行用油圧モータ１９を操作する操作レバー４３と、横穴掘削装置３００を昇降させるウインチ４４と、横穴掘削装置３００の各アクチュエータにつながる油圧ホース４５や照明灯やリミットスイッチ等につながるケーブル類をそれぞれ巻き取るリール４６，４７と、作業車等（例えば前述の自走式車輌１００）に搭載した電源や油圧源と横穴掘削装置３００のアクチュエータとの間に接続配置された切換弁等を収納した制御装置４８とを有する。
（３−２）横穴掘削装置の搬入
前述のように縦穴Ｈ１の掘削中断後、前述した操作装置５のフレーム８をケーシングＳ上に固定する。その後操作装置５の操作盤４２を地上側より適宜操作してウインチ４４を駆動させることにより、ガイドレール７に沿って門形フレーム９及びガイド枠１１を吊り降ろし、これによって横穴掘削機械３００（予め掘削ビット１４Ｚを備えた最先方側のオーガ１４Ａは回転駆動装置１５の固定チャック装置２２に取り付けておく）を縦穴Ｈ１の底部（この時点での底部）に据え付ける。前述の図５は、このときの搬入の様子を表している図である。
（３−３）横穴掘削開始
その後、再度操作装置５の操作盤４２を地上側より適宜操作して、横行用油圧モータ１９を回転させて回転駆動装置１５を掘進方向前方側へ押しつけつつ回転駆動装置１５の回転用油圧モータ１８を駆動させてオーガ１４Ａを回転させ、オーガ１４Ａ及び掘削ビット１４Ｚにより例えば略水平方向に横穴（第１段目、最上段の横穴）Ｌ１１の掘削を開始し、前方側へ掘進していく。図１２は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において、横穴掘削機械３００を縦穴Ｈ１内に搬入し上記のようにして横穴掘削を開始したときの様子を表す側断面図である。図１２に示す例では、汚染土壌領域Ｒは、その汚染物質の濃度に応じて、低濃度汚染領域Ｒ１、中濃度汚染領域Ｒ２、高濃度領域Ｒ３が存在している（このことは、例えばこの浄化処理に先立って行われた土壌汚染調査によって予め判明している）。
（３−４）横穴掘削機械の引き上げ及び次オーガの取り付け
オーガ１４Ａの一本分の長さに対応した所定距離（例えばほぼ一本分の距離）だけ横穴Ｌ１１を掘削したら、操作装置５の操作盤４２を地上側より再び適宜操作して、回転用油圧モータ１８を停止させてオーガ１４Ａ及び掘削ビット１４Ｚの回転を停止させる。その後、操作装置５の操作盤４２を地上側より再び適宜操作して、回転チャック装置１７によるオーガ１４Ａの尾端１４ａの把持を解除する。そして、その位置にオーガ１４Ａ及び掘削ビット１４Ｚを残したまま、横行用油圧モータ１９を回転させ回転駆動装置１５を縦穴Ｈ１側に後退させる。これによってオーガ１４Ａ及び掘削ビット１４Ｚは横穴掘削機械３００から離脱して横穴Ｌ１１内に残置されることとなる。
【００７１】
その後、操作装置５の操作盤４２を地上側より適宜操作しウインチ４４を駆動させることにより、上記のように縦穴Ｈ１側に後退した横穴掘削機械３００を、ガイドレール７に沿って縦穴Ｈ１外へ引き上げる。引き上げた後は、横穴掘削機械３００の回転駆動装置１５を後退させた状態において、オーガ１４Ａに接続する次のオーガ（接続用掘削具）１４Ｂ（又はオーガ１４Ａ、いずれのオーガとするかは当該オーガが最終的に汚染土壌領域に配置されるかどうかで決定する）の尾端１４ａのねじ孔を取り付け筒５５に嵌合し、回転チャック装置１７を閉じることによりオーガ１４Ｂを把持する。
（３−５）横穴掘削機械の再搬入及びオーガの継ぎ足し接続
その後、操作装置５の操作盤４２を地上側より適宜操作しウインチ４４を駆動させることにより、横穴掘削装置３００をケーシングＳ内のストッパ（図示せず）により係止させるまで降下させる。その後操作盤４２を適宜操作し、地中に一部埋設されている先行オーガ１４Ａに対し、横行用油圧モータ１９を作動させて回転駆動装置１５を前進させるとともに、オーガ回転用油圧モータ１８を作動させてオーガ１４Ｂを正転させることにより、後行オーガ１４Ｂの先端１４ｂの雄ねじを先行オーガ１４Ａの尾端１４ａの雌ねじに螺合する。
（３−６）横穴掘削再開
その後、上記（３−３）と同様、操作装置５の操作盤４２を地上側より適宜操作して、回転駆動装置１５を掘進方向前方側へ押しつけつつオーガ１４Ｂ，１４Ａを回転させ、掘削ビット１４Ｚにより横穴Ｌ１１の掘削を再開し、さらに前方側へ掘進していく。先行オーガ１４Ａに新たに接続したオーガ１４Ｂの一本分の長さに対応した所定距離だけ横穴Ｌ１１を掘削したら、上記（３−４）と同様、オーガ１４Ｂ，１４Ａの回転を停止させる。これ以降、上記（３−４）→（３−５）と繰り返し、これによってさらにオーガ１４Ｂ（又はオーガ１４Ａ）を順次継ぎ足しながらその一本分の横穴Ｌ１１の掘削（延伸）を行っていく。図１３は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において、横穴掘削機械３００において、上記のように１本のオーガ１４Ｂを継ぎ足し、掘削ビット１４Ｚのほか合計２本（オーガ１４Ａ、オーガ１４Ｂ）のオーガで掘削を行っている状態を表している（前述の図６はさらにもう１本合計３本で掘削を行っている状態である）。
（３−７）縦穴の延伸、第２段目以降の横穴掘削
以上のようにして予め予定した距離の第１段目の横穴Ｌ１１の掘削が完了したら、上記（３−４）で述べたようにして、全オーガ１４Ａ，１４Ｂを横穴Ｌ１１に残したまま（すなわち埋め殺しにした状態で）、横穴掘削機械３００を引き上げる。横穴掘削機械３００を引き上げたら、上記（２−２）と同様、再び水平伸縮アーム４２２及び垂直伸縮アーム４２３を作動させてアースドリル等を縦穴Ｈ１内に導入し、地山の掘削を再開して縦穴Ｈ１を深さ方向に延伸していく。ケーシングＳの建て込みも併せて行う。そして、前述した深さ方向所定間隔分の深さを掘削したら、縦穴掘削を中断し、その深さから再び上記（３）にて説明したようにして、新たにオーガ１４Ａを取り付けた後さらにオーガ１４を継ぎ足しながら第２段目の横穴Ｌ１２の掘削を行っていく。これ以降は、第３段目の横穴Ｌ１３、第４段目の横穴Ｌ１４、…についても同様である。図１４は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において、横穴掘削機械３００を用いて第３段目の横穴Ｌ１３を掘削している様子を表す側断面図である。図１４において、Ｍは前述した汚染源としての作業機械であり、この例ではフライス盤を表している。Ｎはこの作業機械Ｍが内部に配置された建屋であり、例えば工場等である。
【００７２】
以上のような手順を繰り返し、第１段目横穴Ｌ１１、第２段目横穴Ｌ１２、第３段目横穴Ｌ１３、第４段目横穴Ｌ１４、…と掘削を行う。図１５は、上述した本発明の汚染土壌の浄化処理方法の第１の実施の形態の一連の手順により前述の汚染土壌領域Ｒを含む上記作業機械下方領域に対し掘削された複数（この例では４つの）横穴Ｌ１１，Ｌ１２，Ｌ１３，Ｌ１４が掘削された状況（各横穴Ｌ１１〜Ｌ１４にそれらを掘削した複数のオーガ１４がそれぞれ埋め殺しされている）を表す断面図である。
（３−８）地中汚染物質の吸引・浄化処理
上記のようにしてすべての（この例では全４段の）横穴Ｌ１１，Ｌ１２，Ｌ１３，Ｌ１４の掘削が終了したら、それぞれの中に埋め殺された各オーガ１４Ａ，１４Ｂを介して、汚染土壌領域Ｒに含まれる汚染物質の吸引を行う。図１６は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において、横穴掘削機械を用いて掘削したすべての横穴Ｌ１１〜Ｌ１４に埋め殺された各オーガ１４を介し地中の土壌汚染物質の吸引を行っている様子を表す側断面図である。
【００７３】
図１６において、各横穴Ｌ１１，Ｌ１２，Ｌ１３，Ｌ１４の縦穴Ｈ１側端部に適宜の端栓Ｃ１１，Ｃ１２，Ｃ１３，Ｃ１４を設け、各オーガ１４が埋め殺された状態で各横穴Ｌ１１〜Ｌ１４内を密封する。そして、この密封状態で、地上側から縦穴Ｈ１内へと横穴個数に対応した数（この例では４本）の接続配管Ｐ１１，Ｐ１２，Ｐ１３，Ｐ１４を延設し、それぞれの一端側を、端栓Ｃ１１，Ｃ１２，Ｃ１３，Ｃ１４を貫通しつつ対応するオーガ１４の連通孔１４ｒに連通させる。また接続配管Ｐ１１，Ｐ１２，Ｐ１３，Ｐ１４の他端側は、地上側に設けた吸引・浄化装置６００へと接続する。このとき、端栓Ｃ１１〜Ｃ１４の設置作業及び接続配管Ｐ１１〜Ｐ１４の接続作業は、縦穴Ｈ内における比較的単純な作業であることから、公知の手段（遠隔作業機等）によって地上側の操作により行うことが可能である。
【００７４】
なお、上記のように各横穴Ｌごとに端栓Ｃを設けて接続配管Ｐで接続する代わりに、後述の図１８に示すように、縦穴Ｈの上端部に１つの端栓を設けて縦穴Ｈと全横穴Ｌ１１〜Ｌ１４とで１つの大きな密閉空間を形成させ、その１つの端栓に比較的大きな１つの共通の接続配管を接続して、全横穴Ｌ１１〜Ｌ１４より一度に縦穴Ｈを介して汚染物質を吸引・浄化装置６００へ吸引するようにしてもよい。この場合も地上側から設置可能であることは言うまでもない。
【００７５】
その後、吸引・浄化装置６００に設けた吸引機械（例えばポンプ）によって吸引を開始する。これにより、前述したオーガ１４Ａに設けた連通孔１４ｓより周囲の物質（揮発性物質等の地中気体、あるいは地下水を含む地中液体等の場合もありうる）を取り込み、さらに連通孔１４ｓよりオーガ１４Ａ又は１４Ｂの中空孔１４ｒを介し、上記接続配管Ｐ１１，Ｐ１２，Ｐ１３，Ｐ１４を介し、吸引・浄化装置６００へと導入し収集する。収集された汚染物質は、吸引・浄化装置６００内に設けた公知の浄化処理手段によって所定の浄化処理がなされる。なお、このときは収集のみにとどめて、浄化処理は後に別途まとめて行ってもよい。あるいは吸引・浄化装置６００に代えて浄化処理機能のない吸引収集装置を設け、各地点で収集した物質を別途設けた浄化装置に持ち込んで浄化するようにしてもよい。これにより、対象領域（この例では作業機械Ｍの下方領域）における汚染物質を浄化処理することができる。
【００７６】
以上のようにして、１つの縦穴Ｈ１に対応する位置における土壌汚染物質の垂直方向分布を得たら、順次水平方向に隣接して新たに別の縦穴Ｈ２，Ｈ３，…（図示せず）を掘削し、さらにそれぞれの縦穴から掘削した横穴を用いて同様の浄化処理を行う。このようにして、対象領域（この例では作業機械Ｍの下方領域）における、水平方向及び垂直方向に拡がる３次元的な地中空間について、立体的な（３次元的な）土壌汚染物質の浄化処理を行うことができる。
【００７７】
以上説明した本実施の形態によれば、以下のような効果を得る。
【００７８】
すなわち、本実施の形態においては、縦穴掘削機械２００Ａ，２００Ｂ等で縦穴Ｈを掘削した後、この縦穴Ｈに、縦穴Ｈの径より小さい長さのオーガ１４Ａ又はオーガ１４Ｂを取り付けた横穴掘削機械３００を配置して、この横穴掘削機械３００においてオーガ１４を複数本順次継ぎ足しながら横穴Ｌを掘進していく。そして、オーガ１４Ａ，１４Ｂに設けた中空孔１４ｒを介して汚染物質を吸引し、地上側に設けた吸引・浄化装置６００の浄化処理手段で浄化処理を行う。
【００７９】
このように、短尺のオーガ１４Ａ，１４Ｂを継ぎ足して横穴Ｌを掘削しかつそのオーガ１４Ａ，１４Ｂを介し汚染物質の吸引を行う構成とすることにより、本実施の形態では、前述したように、オーガ１４を地上側で取り付けた横穴掘削機械３００を縦穴Ｈの中に降下させた後は、地上よりの遠隔操作でオーガ１４Ａ，１４Ｂを回転させて所定距離の横穴Ｌを掘削させ、さらに掘削後も同様に地上よりの遠隔操作でオーガ１４Ａ，１４Ｂを横穴掘削機械３００から離脱して横穴Ｌ内に残置し、横穴掘削機械３００を縦穴Ｈ上に引き上げるようにしている。これにより、作業員が縦穴Ｈ内に入坑することなく横穴掘削及び汚染物質の吸引を行うことができるので、従来技術に比べて縦穴Ｈの径を大幅に縮小し、前述のように例えば数十センチ程度にすることが可能となる。この結果、工場の稼働に影響を与えることなく、比較的容易に工場敷地内において縦穴施工スペースを確保することができ、また前述のように建屋Ｎの中での浄化処理も可能となる。さらに例えば、小規模な浄化対象領域が多数存在するような場合であっても、各領域の至近に縦穴Ｈを掘削してこの縦穴Ｈより短い横穴Ｌで容易に到達することができるので、短い施工期間内にそれら全部について効率よく細やかに十分な浄化処理を行うことができる。
【００８０】
なお、上記本発明の第１の実施の形態においては、オーガ１４により横穴Ｌの掘削を行い、そのオーガ１４の中空孔１４ｒを介して汚染物質の吸入を行ったが、これに限られず、公知の推進工法等で用いられる推進管押込機械によって推進管（ヒューム管等）を押し込みつつ（圧入）、この推進管（パイプ形状であるため内部は中空孔を備える）を介して汚染物質の吸入を行ってもよい。
【００８１】
図１７は、図１５は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において上記のように推進管を押し込むことにより横穴に推進管を配設する変形例を表す側断面図である。図１７において、上記本発明の第１の実施の形態における横穴掘削機械３００に代えて推進装置３００′を設け、この推進装置３００′により上記オーガ１４と同様に掘削具としての推進管１４′を公知の手法で順次継ぎ足し圧入し、横穴Ｌ１１，Ｌ１２，Ｌ１３，Ｌ１４を形成していく。
【００８２】
図１８は、本発明の汚染土壌の浄化処理方法の第１の実施の形態において上記横穴に推進管を配設する変形例にて、推進管の配設が終了した状態を表す側断面図である。図１８に示すように、汚染土壌領域Ｒを含む上記作業機械下方領域に対し掘削（形成）された複数の横穴Ｌ１１，Ｌ１２，Ｌ１３，Ｌ１４に、それらを掘削（形成）した複数の推進管１４′がそれぞれそのまま埋め殺しされる（根元側は、縦穴Ｈ１側に露出した状態である）。その後、推進装置３００′は地上側へと引き上げられ（図示せず）、縦穴Ｈ１の上端部に適宜の端栓Ｃ′１を設け、縦穴Ｈと全横穴Ｌ１１〜Ｌ１４とで１つの大きな密閉空間を形成させ、その１つの端栓Ｃ′１に比較的大きな１つの共通の接続配管Ｐ′１を接続して、全横穴Ｌ１１〜Ｌ１４より一度に縦穴Ｈを介して汚染物質を吸引・浄化装置６００へ吸引する。なお、この場合、上記本発明の第１の実施の形態にて図１６を用いて説明したように、各横穴Ｌ１１，Ｌ１２，Ｌ１３，Ｌ１４の縦穴Ｈ１側端部に適宜の端栓を設け、各推進管１４′が埋め殺された状態で各横穴Ｌ１１，Ｌ１２，Ｌ１３，Ｌ１４内を密封し、この状態で、地上側から縦穴Ｈ１内へ４本の接続配管を延設し、それぞれの一端側を上記端栓のそれぞれを貫通しつつ対応する推進管１４′内の中空孔に連通させ、各接続配管の他端側を吸引・浄化装置６００へと接続するようにしてもよい。
【００８３】
本変形例によっても、上記本発明の第１の実施の形態と同様の効果を得る。
【００８４】
本発明の第２の実施の形態を図１９〜図２１により説明する。
【００８５】
本実施の形態による汚染土壌の浄化処理方法は、上記第１の実施の形態と同様、揮発性有機化合物や重金属系の物質を処理するものであり、建造物内において当該汚染源のすぐ近傍にて縦穴を掘削して浄化処理を行う場合の実施の形態である。上記第１の実施の形態と異なる点は、掘削具としてのオーガ１４を埋め殺しにして中空孔１４ｒを汚染物質通路として利用するのではなく、横穴掘削後はオーガ１４をすべて取り去ることである。
【００８６】
すなわち、（１）掘削機械等の運搬、（２）縦穴の掘削は、上記第１の実施の形態と同様に行うので、説明を省略する。（３）横穴の掘削及び地中物質の吸引浄化処理については、（３−１）横穴掘削機械の詳細構成、（３−２）横穴掘削装置の搬入、（３−３）横穴掘削開始、（３−４）横穴掘削機械の引き上げ及び次オーガの取り付け、（３−５）横穴掘削機械の再搬入及びオーガの継ぎ足し接続、（３−６）横穴掘削再開の手順までは、上記第１の実施の形態と同様である。
【００８７】
上記（３−６）の手順により、予め予定した距離の第１段目の横穴Ｌ１１の掘削が完了したら、上記第１の実施の形態と異なり、オーガ１４を継ぎ足したときと逆の手順で全オーガ１４Ａ，１４Ｂを横穴Ｌ１１より引き出す。
【００８８】
すなわち所定距離だけ横穴Ｌ１１を掘削しオーガ１４Ｂ，１４Ａの回転を停止させたら、操作装置５の操作盤４２を地上側より適宜操作し、まず、オーガ回転用油圧モータ１８を作動させて最も後方にあるオーガ１４Ｂ（又は１４Ａ、以下同様）を逆転させるとともに横行用油圧モータ１９を作動させて回転駆動装置１５を後退させ、全オーガ１４Ａ，１４Ｂを（それらがすべて連結した状態で）最後方の上記オーガ１４Ｂの一本分だけ横穴Ｌ１１内にて縦穴Ｈ１側に後退させる。その後、操作盤４２を地上側より適宜操作し、最後方のオーガ１４Ｂより一本前にある（言い換えれば最後方より２番目の）オーガ１４Ｂの尾端１４ａを固定チャック装置２２で把持しつつ、オーガ回転用油圧モータ１８を作動させて最後方のオーガ１４Ｂを逆転させることにより、そのオーガ１４Ｂの先端１４ｂの雄ねじを上記最後方より２番目のオーガ１４Ｂの尾端１４ａの雌ねじから切り離す（螺合を解除する）。これにより、横穴掘削装置３００の回転駆動装置１５は上記最後方のオーガ１４Ｂのみを把持している状態となる。その後、操作盤４２を地上側より適宜操作しウインチ４４を駆動させることにより、横穴掘削装置３００をケーシングＳ内にて上昇させ、縦穴Ｈ１１外へ搬出する。そして、回転チャック装置１７を開くことによりオーガ１４Ｂの把持を解除し、オーガ１４Ｂの尾端１４ａのねじ孔を取り付け筒５５から取り外す。
【００８９】
このようにして一本のオーガ１４Ｂの横穴Ｌ１１からの引き抜き及び地上側への搬出が完了したら、再び横穴掘削装置３００を縦穴Ｈ１１内へ降下させ、操作盤４２を適宜操作し、横行用油圧モータ１９を作動させて回転駆動装置１５を前進させるとともに回転チャック装置１７によって残存しているもののうちこの時点で最後方に位置しているオーガ１４Ｂ（前述では最後方から２番目だったもの）を把持し、オーガ回転用油圧モータ１８を作動させ逆転させるとともに横行用油圧モータ１９を作動させて回転駆動装置１５を後退させ、残存全オーガ１４を横穴Ｌ１１内にて縦穴Ｈ１側にオーガ１本分だけ後退させる。以降、同様の手順を繰り返し、後方側から順に１本ずつオーガ１４を横穴Ｌ１１から縦穴Ｈ１１側へ抜き取ると共に、その都度横穴掘削装置３００を地上側へ引き上げ、オーガ１４を地上側で回収する。
【００９０】
以上のようにして予め予定した距離の第１段目の横穴Ｌ１１の掘削が完了しかつ全オーガ１４Ａ，１４Ｂを横穴Ｌ１１から抜き取ったら（この時点で横穴掘削機械３００も地上側へ引き上げられていることになる）、上記（２−２）と同様、再び水平伸縮アーム４２２及び垂直伸縮アーム４２３を作動させてアースドリル等を縦穴Ｈ１内に導入し、地山の掘削を再開して縦穴Ｈ１を深さ方向に延伸していく。ケーシングＳの建て込みも併せて行う。そして、前述した深さ方向所定間隔分の深さを掘削したら、縦穴掘削を中断し、その深さから再び上記（３）にて説明したようにして、新たにオーガ１４Ａを取り付けた後さらにオーガ１４を継ぎ足しながら第２段目の横穴Ｌ１２の掘削を行っていく。横穴Ｌ１２の掘削が完了したら上記同様に全オーガ１４を横穴Ｌ１２より抜き去る。これ以降は、第３段目の横穴Ｌ１３、第４段目の横穴Ｌ１４、…についても同様である。図１９は、本発明の汚染土壌の浄化処理方法の第２の実施の形態において、横穴掘削機械３００を用いて第３段目の横穴Ｌ１３を掘削している様子を表す側断面図である。以上のような手順を繰り返し、第１段目横穴Ｌ１１、第２段目横穴Ｌ１２、第３段目横穴Ｌ１３、第４段目横穴Ｌ１４、…と掘削を行う。
【００９１】
図２０は、上述した本発明の汚染土壌の浄化処理方法の第２の実施の形態の一連の手順により前述の汚染土壌領域Ｒを含む上記作業機械下方領域に対し掘削された複数（この例では４つの）横穴Ｌ１１，Ｌ１２，Ｌ１３，Ｌ１４が掘削された状況を表す側断面図である。図２０において、図１４と同様、Ｍは作業機械、Ｎは建屋である。図２０において、４つの横穴Ｌ１１〜Ｌ１４を掘削した後は、縦穴Ｈ１の上端部に適宜の端栓Ｃ１を設け、縦穴Ｈと全横穴Ｌ１１〜Ｌ１４とで１つの大きな密閉空間を形成させ、その１つの端栓Ｃ１に比較的大きな１つの共通の接続配管Ｐ１を接続して、全横穴Ｌ１１〜Ｌ１４より一度に縦穴Ｈを介して汚染物質を吸引・浄化装置６００へ吸引する。
【００９２】
なお、この場合、図２１に示したように、上記本発明の第１の実施の形態にて図１６を用いて説明したのと同様、各横穴Ｌ１１，Ｌ１２，Ｌ１３，Ｌ１４の縦穴Ｈ１側端部に適宜の端栓Ｃ１１，Ｃ１２，Ｃ１３，Ｃ１４を設けて各横穴Ｌ１１，Ｌ１２，Ｌ１３，Ｌ１４ごとに内部を密封し、この状態で、地上側から縦穴Ｈ１内へ４本の接続配管Ｐ１１，Ｐ１２，Ｐ１３，Ｐ１４を延設しそれぞれの一端側を上記端栓Ｃ１１，Ｃ１２，Ｃ１３，Ｃ１４のそれぞれに連通させ、各接続配管Ｐ１１，Ｐ１２，Ｐ１３，Ｐ１４の他端側を吸引・浄化装置６００へと接続するようにしてもよい。
【００９３】
本実施の形態によっても、上記本発明の第１の実施の形態と同様の効果を得る。
【００９４】
すなわち、本実施の形態においては、縦穴掘削機械２００Ａ，２００Ｂ等で縦穴Ｈを掘削した後、この縦穴Ｈに、縦穴Ｈの径より小さい長さのオーガ１４Ａ又はオーガ１４Ｂを取り付けた横穴掘削機械３００を配置して、この横穴掘削機械３００においてオーガ１４を複数本順次継ぎ足しながら横穴Ｌを掘進していく。そして、オーガ１４を横穴Ｌより抜き去りかつ横穴掘削機械３００を縦穴Ｈより取り出した後、縦穴Ｈに接続配管Ｐ１を気密に接続し、吸引・浄化装置６００によって汚染物質を横穴Ｌ１１〜Ｌ１４及び縦穴Ｈを介して吸引し、吸引・浄化装置６００の浄化処理手段で浄化処理を行う。
【００９５】
このように、短尺のオーガ１４Ａ，１４Ｂを継ぎ足して横穴Ｌを掘削しかつそのオーガ１４Ａ，１４Ｂを継ぎ足して横穴Ｌを掘削した後に汚染物質の吸引を行う構成とすることにより、本実施の形態でも、上記本発明の第１の実施の形態と同様、オーガ１４を地上側で取り付けた横穴掘削機械３００を縦穴Ｈの中に降下させた後は、地上よりの遠隔操作でオーガ１４Ａ，１４Ｂを回転させて所定距離の横穴Ｌを掘削させ、さらに掘削後も同様に地上よりの遠隔操作でオーガ１４Ａ，１４Ｂを順次縦穴Ｈ上に引き上げるようにしている。これにより、上記第１の実施の形態と同様、従来技術に比べて縦穴Ｈの径を大幅に縮小できる結果、工場の稼働に影響を与えることなく比較的容易に工場敷地内において縦穴施工スペースを確保することができる。また、小規模な浄化対象領域が多数存在するような場合であっても、短い施工期間内にそれら全部について効率よく細やかに十分な浄化処理を行うことができる。
【００９６】
なお、上記本発明の第２の実施の形態においては、横穴Ｌを掘削後は単にオーガ１４を抜き去るのみであったが、これに限られず、オーガ１４を抜き去った後に、多数の連通孔（開口部）を備えた配管（チューブ）を別途挿入配置するようにしてもよい。
【００９７】
図２２〜図２４はそのような変形例を示しており、図２２に示すように、縦穴Ｈ１と汚染領域Ｒを挟んでほぼ対向するような位置に別の縦穴Ｈ′１を（縦穴Ｈ１と同様の手法で）先に掘削しておき、チューブ巻出し装置Ｕに予め巻かれているチューブＴの先端側をこの縦穴Ｈ′１内へ導入しておく。その後、縦穴Ｈ１より縦穴Ｈ１′へ貫通するように既に述べた手法で横穴Ｌ１１〜Ｌ１４を順次掘削し、前述のようにして掘削終了時にオーガ１４を順次横穴掘削機械３００側へ引き抜いていくときに、オーガ１４の最先端に上記チューブＴの先端部を固定することによってチューブＴを併せて横穴Ｌ１１〜Ｌ１４側へ引き込んで挿入配置する。図２３は、各横穴Ｌ１１〜Ｌ１４にそれぞれチューブＴ１１，Ｔ１２，Ｔ１３，Ｔ１４を配置し終わった状態を示している。
【００９８】
その後、図２４に示すように、それらチューブＴ１１〜Ｔ１４の両端部に端栓ＣＬ１１，ＣＲ１１〜ＣＬ１４，ＣＲ１４を取り付け、さらに縦穴Ｈ１側の端栓ＣＬ１１〜ＣＬ１４に地上側から４本の接続配管Ｐ１１，Ｐ１２，Ｐ１３，Ｐ１４の一端側を接続して連通させ、各接続配管Ｐ１１，Ｐ１２，Ｐ１３，Ｐ１４の他端側を吸引・浄化装置６００へと接続し吸引する。各チューブＴ１１〜Ｔ１４には、適宜の箇所（少なくとも汚染領域Ｒに対応する箇所）に多数の連通孔（開口部）が設けられており、これらより取り込まれた汚染物質が、チューブＴ１１〜Ｔ１４→接続配管Ｐ１１〜Ｐ１４を介し吸引・浄化装置６００へ導入され浄化処理される。なお、図２０に示したように、縦穴Ｈ上端部に１つの大きな端栓を設けこれを吸引・浄化装置６００に接続するようにしてもよい。
【００９９】
本変形例によっても、上記第２の実施の形態と同様の効果を得る。
【０１００】
なお、以上においては、１つの縦穴Ｈ１に対応する位置における土壌汚染物質の垂直方向分布を得たら、順次水平方向に隣接して新たに別の縦穴Ｈ２，Ｈ３，…を掘削し、さらにそれぞれの縦穴から掘削した横穴を用いて同様の浄化処理を行い、この結果として、水平断面でみて直交メッシュ状の浄化処理地点設定を実現した。しかしながら、メッシュ形状はこれに限られるものではなく、他のメッシュ形状でもよい。
【０１０１】
すなわち例えば、１つの縦穴Ｈ１のみを掘削し、この縦穴Ｈ１の深さ方向所定間隔ごとの各位置において、それぞれ放射状に等角度間隔に第１段目の横穴Ｌ１１を複数個、第２段目の横穴Ｌ１２を複数個、第３段目の横穴Ｌ１３を複数個、第４段目の横穴Ｌ１４を複数個というように掘削して浄化処理を行ってもよい。この場合においても、上記と同様の効果を得る。
【０１０２】
【発明の効果】
本発明によれば、作業員が縦穴内に入坑することなく横穴掘削及び汚染物質の吸引を行うことができるので、従来技術に比べて縦穴の径を大幅に縮小し、例えば数十センチ程度にすることが可能となる。この結果、工場の稼働に影響を与えることなく、比較的容易に工場敷地内において縦穴施工スペースを確保することができる。また例えば、小規模な浄化対象領域が多数存在するような場合であっても、各領域の至近に縦穴を掘削してこの縦穴より短い横穴で容易に到達することができるので、短い施工期間内にそれら全部について効率よく細やかに十分な浄化処理を行うことができる。
【図面の簡単な説明】
【図１】本発明の汚染土壌の浄化処理方法の第１の実施の形態において自走式車輌による機械・設備の運搬時の様子を表す図である。
【図２】本発明の汚染土壌の浄化処理方法の第１の実施の形態において切削時の様子を表す側断面図である。
【図３】本発明の汚染土壌の浄化処理方法の第１の実施の形態において水平伸縮アームの回動時の様子を表す平面図である。
【図４】本発明の汚染土壌の浄化処理方法の第１の実施の形態において縦穴の掘削時の様子を表す側断面図である。
【図５】本発明の汚染土壌の浄化処理方法の第１の実施の形態において用いる横穴掘削機械の構成を表す正面図である。
【図６】本発明の汚染土壌の浄化処理方法の第１の実施の形態において用いる横穴掘削機械の構成を表す側断面図である。
【図７】本発明の汚染土壌の浄化処理方法の第１の実施の形態において用いる横穴掘削機械の詳細構成を表す水平断面図である。
【図８】本発明の汚染土壌の浄化処理方法の第１の実施の形態において横穴掘削機械を構成する回転駆動装置の内部構成を表す側断面図である。
【図９】本発明の汚染土壌の浄化処理方法の第１の実施の形態において横穴掘削機械の掘削具を構成するオーガの詳細構造を表す側面図である。
【図１０】本発明の汚染土壌の浄化処理方法の第１の実施の形態において横穴掘削機械の掘削具を構成するオーガの詳細構造を表す分解縦断面図である。
【図１１】本発明の汚染土壌の浄化処理方法の第１の実施の形態において横穴掘削機械を構成する回転駆動装置を前方側みた正面図である。
【図１２】本発明の汚染土壌の浄化処理方法の第１の実施の形態において、横穴掘削機械を縦穴内に搬入し横穴掘削を開始したときの様子を表す側断面図である。
【図１３】本発明の汚染土壌の浄化処理方法の第１の実施の形態において、横穴掘削機械による掘削を行っているときの様子を表す側断面図である。
【図１４】本発明の汚染土壌の浄化処理方法の第１の実施の形態において、横穴掘削機械による複数段の横穴の掘削を順次行っているときの様子を表す側断面図である。
【図１５】本発明の汚染土壌の浄化処理方法の一実施の形態の一連の手順により汚染土壌領域を含む作業機械下方領域に対し複数の横穴が掘削された状況を表す側断面図である。
【図１６】本発明の汚染土壌の浄化処理方法の第１の実施の形態において、横穴掘削機械を用いて掘削したすべての横穴に埋め殺された各オーガを介し地中の土壌汚染物質の吸引を行っている様子を表す側断面図である。
【図１７】本発明の汚染土壌の浄化処理方法の第１の実施の形態において推進管を押し込むことにより横穴に推進管を配設する変形例を表す側断面図である。
【図１８】本発明の汚染土壌の浄化処理方法の第１の実施の形態において横穴に推進管を配設する変形例にて、推進管の配設が終了した状態を表す側断面図である。
【図１９】本発明の汚染土壌の浄化処理方法の第２の実施の形態において、横穴掘削機械を用いて横穴を掘削している様子を表す側断面図である。
【図２０】本発明の汚染土壌の浄化処理方法の第２の実施の形態の一連の手順により前述の汚染土壌領域を含む上記作業機械下方領域に対し掘削された複数の横穴が掘削された状況を表す側断面図である。
【図２１】各横穴の縦穴側端部に端栓を設ける第２の実施の形態の変形例を表す縦断面図である。
【図２２】各横穴に連通孔を備えた配管を挿入配置する第２の実施の形態の変形例を表す縦断面図である。
【図２３】各横穴に連通孔を備えた配管を挿入配置する第２の実施の形態の変形例を表す縦断面図である。
【図２４】各横穴に連通孔を備えた配管を挿入配置する第２の実施の形態の変形例を表す縦断面図である。
【符号の説明】
９門形フレーム
１１ガイド枠
１４Ａオーガ（掘削具）
１４ａ尾端（後端側掴み部）
１４Ｂオーガ（掘削具）
１４ｒ中空孔
１５回転駆動装置
１９横行用油圧モータ
２２固定チャック装置
２３，２４爪
１００自走式車輌
２００縦穴掘削機械
３００横穴掘削機械
４２１旋回支持台
４２２水平伸縮アーム
４２３垂直伸縮アーム
６００吸引・浄化装置
Ｃ端栓
Ｈ縦穴
Ｌ横穴
Ｎ建屋
Ｔチューブ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a contaminated soil purification system and method, and more particularly, to a contaminated soil purification system and method capable of performing efficient and sufficient purification treatment without hindering operation of a factory.
[0002]
[Prior art]
In recent years, for example, a problem of environmental pollution due to volatile organic compounds (for example, so-called VOCs such as trichloroethylene and tetrachloroethylene) generated from a cleaning solution for cleaning, a cleaning solution in a semiconductor manufacturing process, and an oil cleaning solution in a factory or the like has been raised. . For example, when such volatile organic compounds leak into the soil for some reason, the soil is contaminated by the volatile organic compounds, and if the contaminated soil is left as it is, natural infiltration or rainwater In some cases, the water may further penetrate deep into the soil and eventually contaminate the groundwater.
[0003]
As a technique for purifying such contaminated soil, for example, after drilling a vertical hole near a building and excavating a horizontal hole from this vertical hole, an open pipe for suctioning underground air having openings at many locations in the axial direction is used. There is one that is inserted and arranged in a side hole, and takes in contaminants from the target soil into the opening pipe through the opening of the opening pipe (for example, see Patent Document 1). The contaminants taken into the opening pipe from the opening are sent to the ground side through the opening pipe, and are purified by a contaminant treatment device provided on the ground side.
[0004]
[Patent Document 1]
JP-A-11-10130 (FIGS. 5 to 7 etc.)
[0005]
[Problems to be solved by the invention]
The following problems exist in the above conventional technology.
[0006]
That is, in the above-described conventional technology, the diameter of the vertical hole is set to be as large as 2 m or more in order to excavate the horizontal hole from the vertical hole after excavating the vertical hole. However, it is not easy to secure such a large-diameter vertical hole in, for example, a factory premises, and if it is to be forcibly provided, a space corresponding thereto must be provided. For this reason, movement of materials and machines is required, which affects the operation of the factory. In severe cases, the operation may be partially stopped.
[0007]
In order to avoid this, a method may be considered in which a vertical hole is provided outside the factory site and a long horizontal hole is excavated from the vertical hole to the soil to be subjected to the purification treatment. However, in this case, since various pipes, cables, underground pits, and other buried objects buried in the lower part of the factory become obstacles, it becomes difficult to excavate a side hole in some places. Also, for example, when there are many small-scale purification target areas, it is inefficient because long side holes must be excavated in each area, and all of them are finely and sufficiently sufficient within a limited construction period. It is difficult to perform a purification process.
[0008]
The present invention has been made based on the above-mentioned matters, and an object of the present invention is to provide a purification system and method for contaminated soil that can efficiently and sufficiently perform purification treatment without hindering operation of a factory. is there.
[0009]
[Means for Solving the Problems]
(1) In order to achieve the above object, the present invention relates to a contaminated soil purification treatment system for purifying contaminated soil, comprising: a shaft excavation machine; a shaft excavated by the shaft excavation machine; A hollow hole for sucking contaminants from contaminated soil, comprising a drilling tool having a length smaller than the diameter of the vertical hole, and a horizontal hole drilling machine for excavating a horizontal hole while sequentially adding a plurality of the drilling tools. .
[0010]
In the present invention, after excavating a vertical hole with a vertical hole drilling machine, a horizontal hole drilling machine having a drilling tool having a length smaller than the diameter of the vertical hole is arranged in the vertical hole, and a plurality of the drilling tools are used in the horizontal hole drilling machine. Dig through the side hole while successively adding. Then, the contaminants are sucked through the hollow holes provided in the excavation tool, and a purification process is performed by, for example, a processing unit provided on the ground side.
[0011]
In this way, by adding a short excavation tool to excavate a horizontal hole and sucking contaminants through the excavation tool, for example, a horizontal hole excavation machine having an excavation tool attached on the ground side can be installed in a vertical hole. After the descent, the drilling tool is rotated by remote control from the ground to excavate a horizontal hole of a predetermined distance, and after drilling, the drilling tool is similarly separated from the horizontal hole drilling machine by remote control from the ground and the horizontal hole is drilled. It is possible to lift the horizontal hole drilling machine above the vertical hole. As a result, it is possible to excavate the side hole and suck the contaminants without entering the shaft into the shaft, so that the diameter of the shaft is significantly reduced, for example, to about several tens of centimeters as compared with the related art. Becomes possible. As a result, it is possible to relatively easily secure the vertical hole construction space in the factory site without affecting the operation of the factory. Also, for example, even when a large number of small-scale purification target areas are present, a vertical hole is excavated in the vicinity of each area and can be easily reached with a horizontal hole shorter than the vertical hole. All of them can be efficiently and finely and sufficiently purified.
[0012]
(2) In order to achieve the above object, the present invention relates to a contaminated soil purification treatment system for purifying contaminated soil, comprising: a shaft excavation machine; a shaft excavated by the shaft excavation machine; A hollow hole for sucking contaminants from the contaminated soil, having a drilling tool having a length smaller than the diameter of the vertical hole, a horizontal hole drilling machine that excavates a horizontal hole while sequentially adding a plurality of the drilling tools, A self-propelled vehicle that loads and transports the vertical hole excavator and the horizontal hole excavator.
[0013]
(3) In any of the above (1) or (2), preferably, the contaminated soil is disposed on the ground side outside the vertical hole and connected to the hollow hole of the excavator, and is contaminated in the contaminated soil through the hollow hole. It further comprises a suction machine for sucking and collecting the substance.
[0014]
(4) In the above (3), further preferably, there is further provided processing means for purifying the contaminants collected by suction by the suction machine.
[0015]
(5) In order to achieve the above object, the present invention relates to a contaminated soil purification treatment system for purifying contaminated soil, comprising: a vertical hole drilling machine; and a vertical hole drilled by the vertical hole drilling machine; A drilling tool having a length smaller than the diameter of the drilling tool, a horizontal hole drilling machine that excavates a horizontal hole while sequentially adding a plurality of the drilling tools, and is hermetically connected to the vertical hole or the horizontal hole or a pipe inserted and arranged in the horizontal hole. Suction means for sucking contaminants taken in from the contaminated soil to be purified through the lateral hole or the pipe.
[0016]
In the present invention, after excavating a vertical hole with a vertical hole drilling machine, a horizontal hole drilling machine having a drilling tool having a length smaller than the diameter of the vertical hole is arranged in the vertical hole, and a plurality of the drilling tools are used in the horizontal hole drilling machine. Dig through the side hole while successively adding. Then, for example, after extracting the drilling tool from the side hole and taking out the side hole excavating machine from the vertical hole, the suction means is airtightly connected to the vertical hole, or the horizontal hole, or the pipe inserted and arranged in the horizontal hole, and the contaminant is taken into the horizontal hole or the pipe. , And a purifying process is performed by, for example, a processing unit provided on the ground side.
[0017]
As described above, by adopting a configuration in which a short excavation tool is added to excavate a horizontal hole and a contaminant is suctioned by the suction means, for example, a horizontal hole excavation machine having the excavation tool attached on the ground side is lowered into a vertical hole. After that, the drilling tool is rotated by remote control from the ground to excavate a side hole of a predetermined distance, and after the excavation, the drilling tool is similarly separated from the horizontal hole drilling machine by remote control from the ground and into the horizontal hole. It is possible to leave the horizontal hole drilling machine above the vertical hole. As a result, it is possible to excavate the side hole and suck the contaminants without entering the shaft into the shaft, so that the diameter of the shaft is significantly reduced, for example, to about several tens of centimeters as compared with the related art. Becomes possible. As a result, it is possible to relatively easily secure the vertical hole construction space in the factory site without affecting the operation of the factory. Also, for example, even when a large number of small-scale purification target areas are present, a vertical hole is excavated in the vicinity of each area and can be easily reached with a horizontal hole shorter than the vertical hole. All of them can be efficiently and finely and sufficiently purified.
[0018]
(6) In order to achieve the above object, the present invention relates to a polluted soil purification treatment system for purifying contaminated soil, comprising: a vertical hole drilling machine; and a vertical hole drilled by the vertical hole drilling machine. A drilling tool having a length smaller than the diameter of the drilling tool, a horizontal hole drilling machine that excavates a horizontal hole while sequentially adding a plurality of the drilling tools, and is hermetically connected to the vertical hole or the horizontal hole or a pipe inserted and arranged in the horizontal hole. A suction means for sucking contaminants taken from the contaminated soil to be purified through the side hole or the pipe, and a vertical hole excavating machine, the horizontal hole excavating machine, and a self-propelled vehicle that loads and transports the suction means. Is provided.
[0019]
(7) In the above (2) or (6), preferably, a turning support stand arranged on the self-propelled vehicle, a horizontal telescopic arm rotatably supported by the turning support base, and the horizontal telescopic arm And the vertical excavation machine is provided detachably on the vertical telescopic arm.
[0020]
(8) In any one of the above (1), (2), (5), and (6), preferably, the vertical hole drilled by the vertical hole drilling machine is moved up and down to mount the horizontal hole drilling machine. There is provided a frame, and the horizontal hole excavating machine includes a rotary drive device provided on the lifting frame for rotating the drilling tool, and a traversing device for reciprocating the rotary drive device back and forth.
[0021]
(9) In the above (8), more preferably, a fixed chuck device having a plurality of gripping claws for gripping a rear end side grip portion of the preceding excavation tool, and a rear end side of the following excavation tool A rotating chuck device having a plurality of gripping claws for gripping the gripping portion and being rotated by the rotary driving device;
[0022]
(10) In the above (5) or (6), preferably, the apparatus further comprises a processing unit for purifying the contaminant collected by suction by the suction unit.
[0023]
(11) In order to achieve the above object, a method for purifying contaminated soil according to the present invention is characterized in that a vertical hole is drilled by a vertical hole drilling machine, and a horizontal hole excavation provided with a detachable drilling tool having a length smaller than the diameter of the vertical hole. After arranging a machine in a vertical hole and rotating the plurality of the drilling tools by the side-hole drilling machine sequentially while rotating to drill a horizontal hole, the drilling tool is rotated through a hollow hole provided in the drilling tool in a non-rotating state. The contaminants in the contaminated soil are aspirated and collected on the ground side outside the vertical hole.
[0024]
(12) In order to achieve the above object, a method for purifying contaminated soil according to the present invention is directed to a horizontal hole in which a vertical hole is drilled by a vertical hole drilling machine and a detachable drilling tool having a length smaller than the diameter of the vertical hole is attached. Lower the excavating machine into the vertical hole, operate the side hole excavating machine from the ground to rotate the excavating tool, excavate a side hole of a predetermined distance corresponding to the length of the excavating tool, and move the side hole excavating machine to the ground. Operation to stop the rotation of the drilling tool, operate the side hole drilling machine from the ground to separate the drilling tool from the side hole drilling machine and leave it in the side hole, and place the side hole drilling machine on the vertical hole. , And a new drilling tool connected to the drilling tool remaining in the side hole is mounted on the raised side hole drilling machine, and the side hole drilling machine is lowered again into the vertical hole, and the side hole drilling machine is lifted from the ground. Operate the new Connect the drilling tool to the drilling tool left in the side hole, operate the side drilling machine from the ground and rotate the new drilling tool and the remaining drilling tool to correspond to the length of the new drilling tool. Excavating a side hole of a predetermined distance, operating the side hole excavating machine from the ground to stop the rotation, and in the stopped state, operating the side hole excavating machine from the ground to excavate the new excavation tool into the side hole excavation. After detaching from the machine and leaving it in the side hole, thereafter, in the same manner as described above, further new digging tools are added, a plurality of digging tools are penetrated and extended in a predetermined range of contaminated soil, and the plurality of digging tools are extended. In a non-rotation state of the drilling tool, contamination around the sampling hole is provided through a sampling hole provided in at least one surface of the plurality of drilling tools and a hollow hole provided in the drilling tool so as to communicate with the sampling hole. Before suctioning contaminants in the soil To collect in the vertical hole out of the ground side.
[0025]
(13) In order to achieve the above object, the present invention provides a method for purifying contaminated soil within a predetermined range located below a building, the method comprising the steps of: Loading a drilling machine and excavating a vertical hole in the building, lowering a horizontal hole drilling machine equipped with a detachable drilling tool having a length smaller than the diameter of the vertical hole into the vertical hole, By operating the excavator from the ground side in the building to excavate a side hole of a predetermined distance corresponding to the length of the excavator, operating the side hole excavating machine from the ground side in the building Stopping the rotation of the drilling tool, operating the side hole drilling machine from the ground side in the building, leaving the drilling tool from the side hole drilling machine and leaving it in the side hole, Pull up on the vertical hole and leave it in the horizontal hole A new drilling tool connected to the drilling tool was mounted on the raised horizontal hole drilling machine, the horizontal hole drilling machine was lowered again into the vertical hole, and the horizontal hole drilling machine was operated from the ground side in the building. The new drilling tool is connected to the drilling tool left in the side hole, and the side hole drilling machine is operated from the ground side in the building to rotate the new drilling tool and the remaining drilling tool. Excavating a side hole of a predetermined distance corresponding to the length of the new excavator, operating the side hole excavating machine from the ground side in the building to stop the rotation, and in the stopped state, excavating the side hole By operating the machine from the ground side in the building, the new excavation tool is detached from the side hole excavation machine and left in the side hole, and thereafter, additional new excavation tools are added in the same manner as described above. In a given range of contaminated soil. The drilling tools are provided so as to penetrate and extend in a non-rotating state of the plurality of drilling tools, and provided in the drilling tool so as to communicate with the sampling hole provided in at least one surface of the plurality of drilling tools and the sampling hole. The contaminants in the contaminated soil around the sampling hole are sucked through the hollow hole and collected on the ground side outside the vertical hole.
[0026]
(14) In order to achieve the above object, a method for purifying contaminated soil according to the present invention is characterized in that a vertical hole is drilled by a vertical hole drilling machine, and a horizontal hole provided with a detachable drilling tool having a length smaller than the diameter of the vertical hole. After digging the drilling machine in the vertical hole, rotating the plurality of drilling tools by the side-hole drilling machine sequentially and excavating the horizontal hole, withdrawing the drilling tool from the drilled horizontal hole and removing the horizontal hole drilling machine A suction means is hermetically connected to the vertical hole or the horizontal hole, taken out of the vertical hole, and contaminants taken in from the contaminated soil to be purified through the horizontal hole are collected by suctioning to the ground side.
[0027]
(15) In order to achieve the above object, a method of purifying contaminated soil according to the present invention is directed to a method of excavating a vertical hole with a vertical hole excavating machine, and attaching a detachable drilling tool having a length smaller than the diameter of the vertical hole. Lower the excavating machine into the vertical hole, operate the side hole excavating machine from the ground to rotate the excavating tool, excavate a side hole of a predetermined distance corresponding to the length of the excavating tool, and move the side hole excavating machine to the ground. Operation to stop the rotation of the drilling tool, operate the side hole drilling machine from the ground to separate the drilling tool from the side hole drilling machine and leave it in the side hole, and place the side hole drilling machine on the vertical hole. , And a new drilling tool connected to the drilling tool remaining in the side hole is mounted on the raised side hole drilling machine, and the side hole drilling machine is lowered again into the vertical hole, and the side hole drilling machine is lifted from the ground. Operate the new Connect the drilling tool to the drilling tool left in the side hole, operate the side drilling machine from the ground and rotate the new drilling tool and the remaining drilling tool to correspond to the length of the new drilling tool. Excavating a side hole of a predetermined distance, operating the side hole excavating machine from the ground to stop the rotation, and in the stopped state, operating the side hole excavating machine from the ground to excavate the new excavation tool into the side hole excavation. After detaching from the machine and leaving it in the side hole, thereafter, in the same manner as above, further excavating tools are added, and after a plurality of excavating tools are penetrated and extended in a predetermined range of contaminated soil, A plurality of drilling tools are withdrawn from the excavated lateral hole, the lateral hole excavating machine is taken out of the vertical hole, suction means is airtightly connected to the vertical hole or the lateral hole, and contamination taken in from the contaminated soil to be purified through the lateral hole. material Aspirated on the ground to collect.
[0028]
(16) In order to achieve the above object, a method of purifying contaminated soil according to the present invention provides a method of excavating a vertical hole with a vertical hole drilling machine, and attaching a detachable drilling tool having a length smaller than the diameter of the vertical hole. Lowering the excavating machine into the vertical hole, operating the side hole excavating machine from the ground side in the building to rotate the excavator and excavate a side hole of a predetermined distance corresponding to the length of the excavator, The side hole excavation machine is operated from the ground side in the building to stop the rotation of the excavation tool, and the side hole excavation machine is operated from the ground side in the building to move the excavation tool from the side hole excavation machine. Detached and left in the side hole, lift the side hole drilling machine onto the vertical hole, attach a new drilling tool connected to the drilling tool left in the side hole to the raised side hole drilling machine, Lower the machine again into the well Operating the side hole excavating machine from the ground side in the building to connect the new excavating tool to the excavating tool left in the side hole, and operating the side hole excavating machine from the ground side in the building Rotating the new digging tool and the remaining digging tool to dig a side hole of a predetermined distance corresponding to the length of the new digging tool, and operating the side hole drilling machine from the ground side in the building. Stopping the rotation, in the stopped state, operating the side hole excavation machine from the ground side in the building, detaching the new excavation tool from the side hole excavation machine and leaving it in the side hole, Thereafter, in the same manner as described above, further new drilling tools are added, and after a plurality of drilling tools are penetrated and extended in the predetermined range of contaminated soil, the plurality of drilling tools are removed from the excavated lateral hole. Take the horizontal hole drilling machine out of the vertical hole Out, the suction means to the vertical hole or the lateral hole and hermetically connected to, collecting and sucking the captured contaminants through the lateral hole from contaminated soil purification processed on the ground.
[0029]
(17) In order to achieve the above object, a method of purifying contaminated soil according to the present invention provides a method of excavating a vertical hole with a vertical hole excavating machine, and including a detachable excavator having a length smaller than the diameter of the vertical hole. After digging the drilling machine in the vertical hole, rotating the plurality of drilling tools by the side-hole drilling machine sequentially and excavating the horizontal hole, withdrawing the drilling tool from the drilled horizontal hole and removing the horizontal hole drilling machine Take out from the vertical hole, insert a pipe with an opening in the contaminated soil area to be subjected to purification treatment into the horizontal hole, airtightly connect a suction means to the vertical hole or the pipe, and open the hole from the contaminated soil area. The contaminants taken in through the are suctioned to the ground side and collected.
[0030]
(18) Further, in order to achieve the above object, a method for purifying contaminated soil according to the present invention is directed to a method for excavating a vertical hole with a vertical hole excavating machine, and attaching a detachable drilling tool having a length smaller than the diameter of the vertical hole. Lower the excavating machine into the vertical hole, operate the side hole excavating machine from the ground to rotate the excavating tool, excavate a side hole of a predetermined distance corresponding to the length of the excavating tool, and move the side hole excavating machine to the ground. Operation to stop the rotation of the drilling tool, operate the side hole drilling machine from the ground to separate the drilling tool from the side hole drilling machine and leave it in the side hole, and place the side hole drilling machine on the vertical hole. , And a new drilling tool connected to the drilling tool remaining in the side hole is mounted on the raised side hole drilling machine, and the side hole drilling machine is lowered again into the vertical hole, and the side hole drilling machine is lifted from the ground. Operate the new Connect the drilling tool to the drilling tool left in the side hole, operate the side drilling machine from the ground and rotate the new drilling tool and the remaining drilling tool to correspond to the length of the new drilling tool. Excavating a side hole of a predetermined distance, operating the side hole excavating machine from the ground to stop the rotation, and in the stopped state, operating the side hole excavating machine from the ground to excavate the new excavation tool into the side hole excavation. After detaching from the machine and leaving it in the side hole, thereafter, in the same manner as above, further excavating tools are added, and after a plurality of excavating tools are penetrated and extended in a predetermined range of contaminated soil, A plurality of drilling tools are withdrawn from the excavated lateral hole, the lateral hole excavating machine is taken out of the vertical hole, and a pipe provided with an opening in a contaminated soil area to be purified is inserted and arranged in the horizontal hole, and the vertical hole or the pipe is disposed. Care about the suction means Connected to, collecting and sucking the captured contaminants through the lateral hole from contaminated soil purification processed on the ground.
[0031]
(19) In order to achieve the above object, a method of purifying contaminated soil according to the present invention is directed to a method of excavating a vertical hole with a vertical hole excavating machine, and attaching a detachable drilling tool having a length smaller than the diameter of the vertical hole. Lowering the excavating machine into the vertical hole, operating the side hole excavating machine from the ground side in the building to rotate the excavator and excavate a side hole of a predetermined distance corresponding to the length of the excavator, The side hole excavation machine is operated from the ground side in the building to stop the rotation of the excavation tool, and the side hole excavation machine is operated from the ground side in the building to move the excavation tool from the side hole excavation machine. Detached and left in the side hole, lift the side hole drilling machine onto the vertical hole, attach a new drilling tool connected to the drilling tool left in the side hole to the raised side hole drilling machine, Lower the machine again into the well Operating the side hole excavating machine from the ground side in the building to connect the new excavating tool to the excavating tool left in the side hole, and operating the side hole excavating machine from the ground side in the building Rotating the new digging tool and the remaining digging tool to dig a side hole of a predetermined distance corresponding to the length of the new digging tool, and operating the side hole drilling machine from the ground side in the building. Stopping the rotation, in the stopped state, operating the side hole excavation machine from the ground side in the building, detaching the new excavation tool from the side hole excavation machine and leaving it in the side hole, Thereafter, in the same manner as described above, further new drilling tools are added, and after a plurality of drilling tools are penetrated and extended in the predetermined range of contaminated soil, the plurality of drilling tools are removed from the excavated lateral hole. Take the horizontal hole drilling machine out of the vertical hole And a pipe provided with an opening in the contaminated soil region to be purified is inserted into the lateral hole, and a suction means is airtightly connected to the vertical hole or the pipe. Suction the collected contaminants on the ground and collect them
[0032]
(20) In any one of the above (11) to (19), preferably, the collected contaminants are purified by a processing means provided on the ground side outside the vertical hole.
[0033]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a method for purifying contaminated soil and a system for purifying contaminated soil that implements the method of the present invention will be described with reference to the drawings.
[0034]
First, a first embodiment of the present invention will be described with reference to FIGS.
[0035]
The method for purifying contaminated soil according to the present embodiment includes, for example, a cleaning liquid for cleaning generated from a pollution source (for example, an industrial machine such as a machine tool) disposed in an industrial building such as a factory, and a semiconductor. Volatile organic compounds (for example, so-called VOCs such as trichloroethylene and tetrachloroethylene) generated from cleaning liquids and other oil cleaning liquids in the manufacturing process, and heavy metal-based substances such as hexavalent chromium and cadmium (hereinafter collectively referred to as contaminants as appropriate) Is an embodiment in which the present invention is applied to soil contaminated by, and a vertical hole is excavated in a building in the immediate vicinity of the pollution source to perform purification treatment. The purification processing procedure in the present embodiment is roughly divided into a step of transporting an excavating machine to a purification processing site, a step of excavating a vertical hole, a step of excavating a horizontal hole, and a step of suction-collecting contaminants. I have. Hereinafter, the system configuration and the detailed procedure will be described.
[0036]
(1) Transportation of excavating machines
In the present embodiment, all or most of the machines and equipment required for performing the purification process are loaded on a self-propelled vehicle and transported to the site of the purification process.
[0037]
FIG. 1 is a diagram illustrating a state in which machines and equipment are transported by the self-propelled vehicle in the first embodiment of the method for purifying contaminated soil according to the present invention. In FIG. 1, reference numeral 100 denotes a self-propelled vehicle for carrying (a truck in this example), reference numeral 200 denotes a vertical hole excavation machine, reference numeral 300 denotes a horizontal hole excavation machine, and reference numeral 400 denotes a self-propelled type in which the vertical hole excavation machine 200 is attached to a tip portion when excavating a vertical hole. This is a support mechanism that supports the vehicle 100.
[0038]
As shown in FIG. 1, at the time of this transportation, the support mechanism 400 is most contracted unlike the extended state described later, and the mounting side of the vertical hole excavating machine 200 (the vertical telescopic arm 423 side described later) is positioned forward of the vehicle. It is mounted in a state where it is aimed. In addition, the self-propelled vehicle 100 is a relatively small truck in this example in order to enable the vehicle 100 to enter the vicinity of the work machine where the vertical hole is to be excavated, as described later.
[0039]
(2) Excavation of vertical hole
(2-1) Cutting of surface layer
Before excavating a vertical hole, cutting of a surface layer (for example, concrete, asphalt layer, etc.) covering the surface of the site to be excavated is usually performed.
[0040]
FIG. 2 is a side sectional view showing a state at the time of the cutting in the first embodiment of the method for purifying contaminated soil according to the present invention. In this example, although not shown, the self-propelled vehicle 100 enters the factory building or in the vicinity thereof, and purifies the contaminated soil area that is considered to be near (directly below) the work machine in the building. An example of the case is shown (see FIG. 14 described later).
[0041]
In FIG. 2, when the self-propelled vehicle 100 is set in accordance with the expected position for excavating a vertical hole, the outrigger 102 (not shown; see FIG. 4 and the like described later) is extended and the lower end thereof is grounded. The traveling vehicle 100 is fixed to the ground.
[0042]
Here, details of the support mechanism 400 will be described.
[0043]
In FIG. 2, reference numeral 421 denotes a turning support installed on the carrier 101 of the self-propelled vehicle 100. The turning support table 421 is mounted on the cylindrical supporting table 421a fixed to the loading platform 101, and is set on the cylindrical supporting table 421a. The turning motor 421c (not shown, see FIG. 4 described later) turns the swiveling side. And a turning wheel 421b for turning.
[0044]
Reference numeral 422 denotes a horizontal telescopic arm. The horizontal telescopic arm 422 has a cylindrical outer arm 422a fixed to the swiveling side of the swivel wheel 421b, and a length slidably inserted into the outer arm 422a. And a scale inner arm 422b. Then, a pinion 422e (same) rotated by a hydraulic telescopic motor 422d (not shown, see FIG. 4 described later) attached to the outer arm 422a meshes with a rack 422c (same) attached to the inner arm 422b. By operating the telescopic motor 422d, the inner arm 422b moves inside the outer arm 422a. Further, the horizontal telescopic arm 422 is configured to be able to rotate backward or by a slight angle range indicated by θ in FIG.
[0045]
Numeral 423 denotes a vertical telescopic arm. This vertical telescopic arm 243 is slidably inserted into a cylindrical outer arm 423a fixed vertically at the end of the inner arm 422b. A cylindrical inner arm 423b and a cylindrical inner arm 423c slidably mounted in the middle arm 423b are provided. At this time, hydraulic telescopic motors 423f and 423g (same as above) having pinions 423d and 423e (not shown, see FIG. 4 described later) are attached to the lower ends of the outer arm 423a and the middle arm 423b, respectively. The racks 423h and 423i (same as above) are engaged with the pinions 423d and 423e, respectively, and the telescopic motors 423f and 423g are operated to move the middle arm 423b and the inner arm 423c up and down. It is configured.
[0046]
At the time of this surface layer cutting, the vertical hole excavating machine 200 is detachably attached to the lower end of the inner arm 423c by, for example, bolting or the like to the support mechanism 400 having the above configuration. As the vertical hole excavating machine 200 at this time, a rotary excavator (hole saw) 200A or the like for cutting (excavating) the surface layer is suitable. When attaching the hole saw 200A to the inner arm 423c, as shown in the state of A in FIG. 4 described below, the horizontal telescopic arm 422 is contracted, and the vertical telescopic arm 423 is contracted. A horizontal motor 421c is operated to rotate the horizontal telescopic arm 422 so that the horizontal telescopic arm 422 is positioned above the tool (in this case, the hole saw 200A), and the vertical telescopic arm 423 is attached with the hole saw 200A or suspended using a hook or the like. Lower and move it to the designated place. FIG. 3 is a plan view showing a state in which the horizontal telescopic arm is rotated in the first embodiment of the method for purifying contaminated soil according to the present invention. In this case, the maximum left and right turning angles of the turning wheel 421 are relatively small as indicated by θ.
[0047]
Although not shown in detail, the hole saw 200A includes a saw blade for cutting formed in an arc shape, and includes a blade object having an approximately circular outer diameter and a hydraulic motor for driving the blade object, as shown in FIG. By rotating the hydraulic motor while the blade object, which is the lower end in the state of being attached to the inner arm 423c, in contact with the surface layer of the target area, the surface layer is scraped off and the diameter corresponding to the vertical hole (for example, a relatively small diameter of about 50 cm) is obtained. ).
(2-2) Excavation of the vertical hole body
After the surface layer has been cut as described above, the vertical hole body is excavated.
[0048]
FIG. 4 is a side sectional view showing a state of excavating the vertical hole in the first embodiment of the method for purifying contaminated soil according to the present invention.
[0049]
In FIG. 4, after finishing the surface layer cutting, the hole saw 200A attached to the tip of the inner arm 423c is pulled up and removed, and as a vertical hole drilling machine 200 for vertical hole drilling, an earth drill (not shown), which is a kind of rotary drilling machine. ). At this time, it is sufficient to operate the horizontal telescopic arm 422 and the vertical telescopic arm 423, for example, as in the case of the hole saw 200A described above.
[0050]
Although not shown, the earth drill includes a rotary cylinder having a substantially circular outer diameter and a hydraulic motor for driving the rotary cylinder having a bit for ground excavation at the tip end. By rotating the hydraulic motor while pressing against the ground (ground) in the target area, the vertical hole H1 having the above-described diameter (for example, a relatively small diameter of about 50 cm) is excavated in the ground. Instead of the earth drill, as the vertical hole drilling machine 200, a well-known drilling bucket (long handle bucket) 200B for scooping and excavating the ground by opening and closing operation may be used to drill the vertical hole H1 (or both). May be used together). FIG. 4 shows, as an example, a state where the vertical hole H1 is excavated using the excavation bucket 200B.
[0051]
When excavating the vertical hole H1 in this way, in order to prevent the surrounding environment from being damaged, the casing S is erected every time the excavation is performed at a predetermined depth. This casing S is, for example, loaded and transported on the carrier 101 of the self-propelled vehicle 100, and operates the horizontal telescopic arm 422 and the vertical telescopic arm 423 as in the case of the hole saw 200A, the earth drill, and the drilling bucket 200B. It suffices to carry it into the vertical hole H1.
[0052]
As described above, the excavation of a vertical hole is performed.Normally, in order to perform the suction purification treatment of contaminants at predetermined intervals in the depth direction, once the predetermined depth is excavated, the vertical hole excavation is temporarily suspended, and Drill a side hole from the depth.
(3) Excavation of side holes and suction purification of underground materials
When the excavation of the vertical hole is interrupted as described above, the horizontal telescopic arm 422 and the vertical telescopic arm 423 are appropriately operated, and the hole saw 200A, the earth drill, and the excavation bucket 200B are carried out from the vertical hole H1 to the ground side. Instead, the horizontal hole excavating machine 300 is carried into the bottom of the vertical hole H1 (the bottom at the time of interruption), and the horizontal hole is excavated from the vertical hole H1.
(3-1) Detailed configuration of the horizontal hole excavating machine
First, a detailed configuration of the side hole excavating machine 300 will be described.
[0053]
FIG. 5 is a front view showing the configuration of the horizontal hole excavating machine 300 used in the first embodiment of the method for purifying contaminated soil according to the present invention, and FIG. 6 is a diagram showing the method for purifying contaminated soil according to the present invention. It is a sectional side view showing the composition of the above-mentioned side hole excavation machine 300 used in a 1st embodiment. However, in FIGS. 5 and 6, the peripheral structure and the vertical hole of the horizontal hole excavating machine 300 are also shown for clarification of the configuration of the entire apparatus. In particular, as described later, in the present embodiment, the excavation of the vertical hole is interrupted at a predetermined depth, and the horizontal hole is excavated each time. However, in FIGS. 5 and 6, for easy understanding, The figure shows a case where the vertical hole is finally excavated to the deepest part as an example.
[0054]
FIG. 7 is a horizontal sectional view illustrating a detailed configuration of the side hole excavating machine 300 used in the first embodiment of the method for purifying contaminated soil according to the present invention.
[0055]
In FIGS. 5, 6, and 7, the horizontal hole excavating machine 300 is attached to the casing S fitted in the vertical hole H1 so as to be able to move up and down. That is, the casing S and the frame 8 of the operating device 5 (details will be described later) installed on the casing S are provided with two guide rails 7 so as to face each other. A guide roller 10 that rolls along the guide rail 7 is attached above and below the left and right pillars of the portal frame 9 that constitutes the horizontal hole excavating machine 300. A guide frame 11 is attached to a lower portion of the portal frame 9.
[0056]
A parallel guide rail 13 is fixed to the guide frame 11 so as to face an opening 12 (see FIG. 7) provided in the casing S, and rotates an auger 14 (a detailed structure will be described later) as a digging tool. The rotating drive device 15 to be driven is movably mounted on the guide frame 11 by the guide rollers 16 attached to the right and left of the two being rollably engaged along the guide rail 13. . The rotary drive device 15 has a rotary chuck device 17 for gripping the tail end 14a of the auger 14 (details will be described later) at the front, and a rotary hydraulic motor 18 for rotating the auger 14.
[0057]
FIG. 8 is a side sectional view illustrating an internal configuration of the rotary drive device 15 included in the horizontal hole excavating machine 300 in the first embodiment of the method for purifying contaminated soil according to the present invention. In FIG. 8, a drive gear 30 attached to the output shaft of the auger rotation hydraulic motor 18 meshes with a receiving gear 32 rotatably attached to a case 31, and the receiving gear 32 is rotatably inserted into the case 31. It is connected to the tip of the tube 34 of the attached chuck claw opening / closing hydraulic cylinder 33.
[0058]
A chuck pawl holding block 38 is connected to the receiving gear 32 by bolts 37, and three chuck pawls 39 are mounted on the block 38 so as to be openable and closable radially. A sliding block 40 is accommodated in the chuck pawl holding block 38 so as to be slidable in the axial direction of the hydraulic cylinder 33. An inclined groove 40a provided around the sliding block 40 is inserted into each of the chuck pawls. 39 is slidably engaged with the inverted T-shaped inclined sliding leg 39a.
[0059]
The sliding block 40 is connected to a piston rod 36 connected to a piston 35 of a hydraulic cylinder 33, and the rotation of the hydraulic motor 18 causes the rotary chuck device 17 including the hydraulic cylinder 33 and the chuck claws 39 to rotate. Further, the sliding block is moved by the expansion and contraction of the hydraulic cylinder 33, and the chuck claw 39 is opened and closed.
[0060]
Returning to FIGS. 5, 6, and 7, a traverse hydraulic motor 19 that reciprocates the rotary drive device 15 is provided on a side portion of the rotary drive device 15, and is attached to an output shaft of the traverse hydraulic motor 19. The pinion 20 is meshed with a rack provided in parallel with the guide rail 13, and the rotation of the hydraulic motor 19 causes the rotation drive device 15 to reciprocate.
[0061]
Reference numeral 22 denotes a fixed chuck device attached to the front of the guide frame 11. The fixed chuck device 22 holds the tail end (rear end) 14a of the preceding auger 14 which is partially buried when the auger 14 is extracted and, if necessary, when the auger is added. The fixed chuck device 22 includes a pair of claws 23 and 24 that are openably and closably mounted so as to be able to grip and release the tail end of the auger 14, left and right hydraulic cylinders 25 and 26 for opening and closing, and these hydraulic cylinders for opening and closing. Link mechanisms 27 and 28 for transmitting the movements of the piston rods 25 and 26 to the claws 23 and 24, respectively.
[0062]
FIG. 9 is a side view showing the detailed structure of the auger 14 constituting the excavator of the side hole excavating machine 300 in the first embodiment of the method for purifying contaminated soil according to the present invention, and FIG. FIG. 3 is an exploded vertical cross-sectional view illustrating a detailed structure of an auger 14 constituting a digging tool of the horizontal hole excavating machine 300 in the first embodiment of the method for purifying contaminated soil.
[0063]
9 and 10, the auger 14 has a structure in which a lateral hole is dug while successively adding a male and female screw type. Specifically, the auger 14A has an auger 14A for mounting a drill bit 14Z at a tip portion, and is sequentially connected to a rear portion thereof. The augers 14A, 14A (or the auger 14B shown in the lower part of FIG. 9, the same applies hereinafter), 14A,.
[0064]
Each of the augers 14A and 14B has a tail end 14a formed into a female screw and a tip 14b formed into a male screw that is screwed into the female screw, thereby enabling the above-described sequential screwing connection structure. The tip (male thread portion) 14b of the foremost auger 14A is screwed and fixed in a female thread portion 14z provided in the drill bit 14Z.
[0065]
Each of the augers 14A and 14B includes a substantially cylindrical main body 14p, and an earth discharging screw 14q spirally provided on the outer peripheral side of the main body 14b. At this time, a hollow hole 14r is formed in the axial direction at the radial center side of the main body portion 14p, and when the augers 14A and 14B are fastened and connected, the hollow holes 14r communicate with each other, and contaminants described later are formed. Is formed. In addition, a large number of communication holes (collecting holes) 14s are provided radially outward from a plurality of axial holes of the hollow hole 14r of the auger 14A. For example, it is configured to be exposed to the outer peripheral side of the auger 14A) and to suck and take in contaminants near the communication hole 14s as described later.
[0066]
Although not shown, a sealing means (for example, an O-ring) made of rubber or the like is interposed at the extension of the auger 14. Thus, in a state where the auger 14 is added, the sealing means is sandwiched between the tail end 14a of the preceding auger 14 and the tip 14b of the following auger 14 to exert a sealing effect, and the hollow holes 14r communicate with each other. The condition is ensured and leakage is prevented.
[0067]
The length of one of the augers 14A and 14B in the axial direction is smaller than the diameter of the vertical hole H1.
[0068]
FIG. 11 is a front view (from the left side in FIG. 8) of the rotary drive device 15 included in the horizontal hole excavating machine 300 in the first embodiment of the method for purifying contaminated soil according to the present invention shown in FIG. It is a front view.
[0069]
In FIGS. 11 and 8, the receiving plate 54 is fixed to the above-described chuck pawl holding block 38 by bolts 37. This receiving plate 54 has a groove for moving the chuck claw 39 similarly to the chuck claw holding block 38, and has a cylindrical mounting cylinder 55 for fitting a female screw hole at the tail end of the auger 14 at the center thereof. Are integrally provided. A seal ring 56 made of rubber or the like is fitted around the root of the mounting cylinder 55, and a seal ring 56 is provided between the tail end of the auger 14 held by the rotary chuck device 17 and the mounting cylinder 55. Are pinched to exhibit a sealing effect.
[0070]
Returning to FIGS. 5, 6, and 7, the operating device 5 operates the auger rotating hydraulic motor 18, the chuck pawl opening / closing hydraulic cylinder 33, and the hydraulic cylinders 25 and 26 of the fixed chuck device 22. An operation panel 42 composed of switches, an operation lever 43 for operating the traversing hydraulic motor 19, a winch 44 for raising and lowering the horizontal hole drilling device 300, a hydraulic hose 45 connected to each actuator of the horizontal hole drilling device 300, an illumination light and a limit Reels 46 and 47 for winding up cables connected to switches and the like, respectively, and are disposed and connected between a power supply or a hydraulic power source mounted on a work vehicle or the like (for example, the above-described self-propelled vehicle 100) and an actuator of the horizontal hole excavator 300. And a control device 48 containing a switching valve and the like.
(3-2) Loading of side hole drilling equipment
After the excavation of the vertical hole H1 is interrupted as described above, the frame 8 of the operating device 5 described above is fixed on the casing S. Thereafter, the winch 44 is driven by appropriately operating the operation panel 42 of the operation device 5 from the ground side, thereby suspending and lowering the portal frame 9 and the guide frame 11 along the guide rails 7. The foremost auger 14A provided with the excavation bit 14Z is attached to the fixed chuck device 22 of the rotary drive device 15) at the bottom of the vertical hole H1 (the bottom at this time). FIG. 5 described above is a diagram showing a state of carrying in at this time.
(3-3) Side hole excavation started
Thereafter, the operation panel 42 of the operation device 5 is again operated as appropriate from the ground side to rotate the traversing hydraulic motor 19 and press the rotation driving device 15 forward in the digging direction while rotating the rotation hydraulic motor 18 of the rotation driving device 15. To drive the auger 14A to start excavation of the horizontal hole (first stage, uppermost horizontal hole) L11 in, for example, a substantially horizontal direction by the auger 14A and the excavation bit 14Z, and to excavate forward. FIG. 12 is a cross-sectional side view showing a state where the horizontal hole excavation machine 300 is loaded into the vertical hole H1 and the horizontal hole excavation is started as described above in the first embodiment of the method for purifying contaminated soil according to the present invention. FIG. In the example shown in FIG. 12, in the contaminated soil region R, a low-concentration contaminated region R1, a medium-concentrated contaminated region R2, and a high-concentration region R3 are present in accordance with the concentration of the contaminant. It has been determined in advance by a soil contamination survey conducted prior to the purification treatment).
(3-4) Lifting of side hole excavator and installation of next auger
After excavating the lateral hole L11 by a predetermined distance (for example, approximately one distance) corresponding to the length of one auger 14A, the operation panel 42 of the operation device 5 is again appropriately operated from the ground side, and The motor 18 is stopped to stop the rotation of the auger 14A and the excavation bit 14Z. Thereafter, the operation panel 42 of the operation device 5 is again appropriately operated from the ground side to release the gripping of the tail end 14a of the auger 14A by the rotary chuck device 17. Then, while leaving the auger 14A and the excavation bit 14Z at that position, the traversing hydraulic motor 19 is rotated to retreat the rotary drive device 15 to the longitudinal hole H1 side. As a result, the auger 14A and the excavation bit 14Z are separated from the side hole excavating machine 300 and remain in the side hole L11.
[0071]
Thereafter, by appropriately operating the operation panel 42 of the operation device 5 from the ground side to drive the winch 44, the horizontal hole excavating machine 300 retreated to the vertical hole H1 side as described above is moved out of the vertical hole H1 along the guide rail 7. Pull up. After being raised, in a state where the rotary drive device 15 of the horizontal hole excavating machine 300 is retracted, the next auger (connecting excavator) 14B (or the auger 14A) to be connected to the auger 14A is determined by the auger. Is determined by determining whether the auger 14B is finally disposed in the contaminated soil region). The screw hole of the tail end 14a is fitted to the mounting cylinder 55, and the rotary chuck device 17 is closed to hold the auger 14B.
(3-5) Reloading of the excavation machine and connecting the auger
Thereafter, by operating the operation panel 42 of the operation device 5 appropriately from the ground side and driving the winch 44, the side hole excavator 300 is lowered until it is locked by the stopper (not shown) in the casing S. Thereafter, the operation panel 42 is appropriately operated to operate the traversing hydraulic motor 19 to advance the rotary drive device 15 with respect to the preceding auger 14A partially buried underground, and to operate the auger rotating hydraulic motor 18. By rotating the auger 14B forward, the male screw at the tip 14b of the following auger 14B is screwed with the female screw at the tail end 14a of the preceding auger 14A.
(3-6) Reopening of horizontal hole excavation
After that, similarly to the above (3-3), the operation panel 42 of the operation device 5 is appropriately operated from the ground side to rotate the augers 14B and 14A while pressing the rotary drive device 15 forward in the excavation direction, and thereby the excavation bit 14Z. As a result, the excavation of the lateral hole L11 is resumed, and the excavation proceeds further forward. When the lateral hole L11 is excavated for a predetermined distance corresponding to the length of one auger 14B newly connected to the preceding auger 14A, the rotation of the augers 14B and 14A is stopped in the same manner as in the above (3-4). Thereafter, the above (3-4) → (3-5) is repeated, whereby the auger 14B (or the auger 14A) is successively added while excavating (stretching) one lateral hole L11. FIG. 13 shows a first embodiment of a method for purifying contaminated soil according to the present invention, in which a single auger 14B is added as described above to a side hole excavating machine 300, and a total of two augers 14A and a drill bit 14Z are used. 14A, auger 14B) is being excavated (FIG. 6 described above is a state in which excavation is being performed with a total of three more augers).
(3-7) Extension of vertical hole, excavation of horizontal hole after the second stage
As described above, when the excavation of the first-stage lateral hole L11 at the predetermined distance is completed, as described in the above (3-4), all the augers 14A and 14B are left in the lateral hole L11 (ie, The side-hole excavator 300 is lifted up (with the burial killed). When the horizontal hole excavating machine 300 is pulled up, the horizontal telescopic arm 422 and the vertical telescopic arm 423 are operated again to introduce an earth drill or the like into the vertical hole H1 as in (2-2) above, and the excavation of the ground is resumed. The vertical hole H1 is extended in the depth direction. The casing S is also installed. Then, when the depth of the predetermined interval in the depth direction is excavated, the excavation of the vertical hole is interrupted, and after the auger 14A is newly attached from that depth again as described in the above (3), the auger is further excavated. Excavation of the second-stage side hole L12 is performed while adding 14. Thereafter, the same applies to the third-stage side hole L13, the fourth-stage side hole L14, and so on. FIG. 14 is a side sectional view showing a state where the third-stage side hole L13 is excavated using the side-hole excavation machine 300 in the first embodiment of the method for purifying contaminated soil according to the present invention. In FIG. 14, M is a work machine as the above-mentioned contamination source, and in this example, represents a milling machine. N is a building in which the working machine M is disposed, such as a factory.
[0072]
The procedure described above is repeated to excavate the first horizontal hole L11, the second horizontal hole L12, the third horizontal hole L13, the fourth horizontal hole L14,. FIG. 15 shows a plurality (in this example, excavated) of the work machine lower region including the contaminated soil region R by a series of procedures of the first embodiment of the contaminated soil purification method of the present invention described above. It is a sectional view showing the situation where four (4) side holes L11, L12, L13, and L14 were excavated (a plurality of augers 14 which excavated them in each side hole L11-L14 are respectively buried and killed).
(3-8) Suction and purification treatment of underground pollutants
When the excavation of all the lateral holes L11, L12, L13, and L14 (in this example, all four stages) is completed as described above, the contaminated soil area is passed through the augers 14A and 14B buried therein. The contaminants contained in R are sucked. FIG. 16 shows soil in the ground through each auger 14 buried in all the lateral holes L11 to L14 excavated using the lateral hole excavation machine in the first embodiment of the method for purifying contaminated soil according to the present invention. It is a side sectional view showing signs that a contaminant is being sucked.
[0073]
In FIG. 16, appropriate end plugs C11, C12, C13, and C14 are provided at the ends of the side holes L11, L12, L13, and L14 on the side of the vertical hole H1. Seal. Then, in this sealed state, a number (four in this example) of connection pipes P11, P12, P13, and P14 corresponding to the number of horizontal holes are extended from the ground side into the vertical holes H1, and one end of each is connected to the end. The plugs C11, C12, C13, and C14 penetrate and communicate with the corresponding communication holes 14r of the auger 14. The other ends of the connection pipes P11, P12, P13, and P14 are connected to a suction / purification device 600 provided on the ground side. At this time, since the installation work of the end plugs C11 to C14 and the connection work of the connection pipes P11 to P14 are relatively simple work in the vertical hole H, the operation on the ground side by a known means (a remote work machine or the like). Can be performed.
[0074]
In addition, instead of providing the end plug C for each lateral hole L and connecting with the connection pipe P as described above, as shown in FIG. And one large closed space is formed by all the lateral holes L11 to L14, one relatively large common connection pipe is connected to one end plug thereof, and all the lateral holes L11 to L14 are simultaneously inserted through the vertical hole H through the vertical hole H. The contaminants may be sucked into the suction / purification device 600. In this case, it is needless to say that it can be installed from the ground side.
[0075]
Thereafter, suction is started by a suction machine (for example, a pump) provided in the suction / purification device 600. Thus, surrounding substances (which may be a ground gas such as a volatile substance, or a ground liquid including groundwater, etc.) are taken in from the communication holes 14s provided in the auger 14A described above, and the auger is further introduced from the communication holes 14s. It is introduced into the suction / purification device 600 through the connection pipes P11, P12, P13, and P14 through the hollow hole 14r of 14A or 14B and collected. The collected contaminants are subjected to a predetermined purification treatment by a known purification treatment means provided in the suction / purification device 600. At this time, only the collection may be performed, and the purification process may be separately performed later. Alternatively, instead of the suction / purification device 600, a suction / collection device without a purification processing function may be provided, and the substances collected at each point may be brought into a separately provided purification device for purification. This makes it possible to purify the contaminants in the target area (the area below the work machine M in this example).
[0076]
As described above, when the vertical distribution of the soil contaminants at the position corresponding to one vertical hole H1 is obtained, another vertical hole H2, H3,... Then, the same purification treatment is performed using horizontal holes excavated from the respective vertical holes. Thus, in the target area (the area below the work machine M in this example), the three-dimensional underground space extending in the horizontal direction and the vertical direction is used to purify the three-dimensional (three-dimensional) soil contaminants. Processing can be performed.
[0077]
According to the embodiment described above, the following effects are obtained.
[0078]
That is, in the present embodiment, after the vertical hole H is excavated by the vertical hole excavating machines 200A, 200B, etc., the horizontal hole excavating machine 300 in which the auger 14A or the auger 14B having a length smaller than the diameter of the vertical hole H is attached to the vertical hole H. Are arranged, and a plurality of augers 14 are sequentially added to the side hole excavating machine 300 to excavate the side hole L. Then, the contaminants are suctioned through the hollow holes 14r provided in the augers 14A and 14B, and the cleaning process is performed by the purification processing means of the suction / purification device 600 provided on the ground side.
[0079]
As described above, the short augers 14A and 14B are added together to excavate the lateral hole L and the suction of the contaminants is performed through the augers 14A and 14B. After lowering the horizontal hole excavating machine 300 with the 14 mounted on the ground side into the vertical hole H, the augers 14A and 14B are rotated by remote control from the ground to excavate the horizontal hole L of a predetermined distance, and further after excavation. Similarly, the augers 14A and 14B are detached from the horizontal hole excavating machine 300 and left in the horizontal hole L by remote control from the ground, and the horizontal hole excavating machine 300 is lifted above the vertical hole H. As a result, since the horizontal hole excavation and the suction of the contaminants can be performed without the worker having to enter the vertical hole H, the diameter of the vertical hole H is significantly reduced as compared with the related art. It can be reduced to about 10 cm. As a result, it is possible to relatively easily secure the vertical hole construction space in the factory site without affecting the operation of the factory, and it is also possible to perform the purification treatment in the building N as described above. Further, for example, even when a large number of small-scale purification target regions are present, a vertical hole H is excavated in the vicinity of each region and can be easily reached with a horizontal hole L shorter than the vertical hole H. All of them can be efficiently and finely and sufficiently purified within the construction period.
[0080]
In the first embodiment of the present invention, the lateral hole L is excavated by the auger 14 and the contaminant is sucked through the hollow hole 14r of the auger 14. However, the present invention is not limited to this. While pushing (press-fitting) a propulsion pipe (fume pipe, etc.) by a propulsion pipe pushing machine used in the propulsion method, the inhalation of contaminants through this propulsion pipe (it has a hollow inside because of the pipe shape) May go.
[0081]
FIG. 17 is a side sectional view showing a modification in which the propulsion pipe is pushed into the side hole by pushing the propulsion pipe as described above in the first embodiment of the method for purifying contaminated soil according to the present invention. It is. In FIG. 17, a propulsion device 300 'is provided in place of the horizontal hole excavating machine 300 in the first embodiment of the present invention, and a propulsion tube 14' as a drilling tool is provided by the propulsion device 300 'similarly to the auger 14. Lateral holes L11, L12, L13, and L14 are formed sequentially by adding and press-fitting by a known method.
[0082]
FIG. 18 is a side sectional view showing a state in which the installation of the propulsion pipes is completed in a modification of the first embodiment of the method for purifying contaminated soil according to the present invention, in which the propulsion pipes are disposed in the side holes. is there. As shown in FIG. 18, a plurality of propulsion pipes 14 excavated (formed) in a plurality of lateral holes L11, L12, L13, L14 excavated (formed) in the lower region of the work machine including the contaminated soil region R. ′ Are respectively buried and killed (the root side is exposed to the vertical hole H1 side). Thereafter, the propulsion device 300 'is lifted to the ground side (not shown), an appropriate end plug C'1 is provided at the upper end of the vertical hole H1, and the vertical hole H and all the horizontal holes L11 to L14 form one large enclosed space. And a relatively large common connection pipe P′1 is connected to the one end plug C′1, and the contaminant is suctioned and purified through the vertical hole H at once from all the horizontal holes L11 to L14. Suction to 600. In this case, as described with reference to FIG. 16 in the first embodiment of the present invention, an appropriate end plug is provided at the end of each of the horizontal holes L11, L12, L13, and L14 on the side of the vertical hole H1. In a state where each propulsion pipe 14 'is buried and sealed, the inside of each horizontal hole L11, L12, L13, L14 is sealed, and in this state, four connection pipes are extended from the ground side into the vertical hole H1, and one end of each connection pipe is provided. Alternatively, the other end of each connection pipe may be connected to the suction / purification device 600 while the other side is connected to the corresponding hollow hole in the propulsion pipe 14 ′ while penetrating each of the end plugs.
[0083]
According to this modification, the same effects as those of the first embodiment of the present invention are obtained.
[0084]
A second embodiment of the present invention will be described with reference to FIGS.
[0085]
The method for purifying contaminated soil according to the present embodiment is for treating a volatile organic compound or a heavy metal-based substance as in the first embodiment, and is used in a building in the immediate vicinity of the pollution source. This is an embodiment in the case of performing a purification process by excavating a vertical hole. The difference from the first embodiment is that the auger 14 as a drilling tool is not buried and the hollow hole 14r is used as a contaminant passage, but the auger 14 is entirely removed after the lateral hole is drilled.
[0086]
That is, (1) transport of an excavating machine and the like, and (2) excavation of a vertical hole are performed in the same manner as in the first embodiment, and a description thereof will be omitted. (3) Regarding the excavation of the side hole and the suction purification processing of the underground material, (3-1) the detailed configuration of the side hole excavation machine, (3-2) the loading of the side hole excavator, (3-3) the start of the side hole excavation, ( 3-4) Lifting of the side-hole excavator and installation of the next auger, (3-5) Reloading of the side-hole excavator and connection of the auger, and (3-6) Reopening of the side-hole excavation, the first implementation described above. This is the same as the embodiment.
[0087]
When the excavation of the first-stage lateral hole L11 at a predetermined distance is completed according to the procedure of (3-6), unlike the first embodiment, the entire procedure is performed in the reverse procedure to that when the auger 14 is added. Augers 14A and 14B are pulled out from side hole L11.
[0088]
That is, after excavating the side hole L11 by a predetermined distance and stopping the rotation of the augers 14B and 14A, the operation panel 42 of the operation device 5 is appropriately operated from the ground side. A certain auger 14B (or 14A, hereinafter the same) is reversed and the traversing hydraulic motor 19 is operated to retreat the rotary drive device 15, and all the augers 14A and 14B (in a state where they are all connected) at the rearmost position One auger 14B is retracted to the vertical hole H1 side in the horizontal hole L11. Thereafter, the operation panel 42 is appropriately operated from the ground side, and while the tail end 14a of the auger 14B located immediately before the last auger 14B (in other words, second from the last) is gripped by the fixed chuck device 22, By operating the auger rotating hydraulic motor 18 to reverse the last auger 14B, the male screw at the tip 14b of the auger 14B is cut off from the female screw at the tail end 14a of the auger 14B second from the last (screw engagement). To cancel). As a result, the rotary drive device 15 of the lateral hole excavator 300 is in a state of gripping only the rearmost auger 14B. Thereafter, by operating the operation panel 42 appropriately from the ground side and driving the winch 44, the horizontal hole excavator 300 is raised in the casing S and carried out of the vertical hole H11. Then, the gripper of the auger 14B is released by opening the rotary chuck device 17, and the screw hole at the tail end 14a of the auger 14B is removed from the mounting cylinder 55.
[0089]
When the pulling of one auger 14B from the lateral hole L11 and the carrying out to the ground side are completed in this way, the lateral hole excavator 300 is lowered into the vertical hole H11 again, the operation panel 42 is appropriately operated, and the horizontal hydraulic motor The rotation drive device 15 is moved forward by operating the rotation auger 19 and the auger 14B (the second one from the rear in the above-described case) that is located at the rearmost position at this time among the remaining ones by the rotary chuck device 17 is gripped. Then, the hydraulic motor 18 for auger rotation is operated to reverse the rotation, and the hydraulic motor 19 for traverse operation is operated to retreat the rotary drive device 15 so that all the remaining augers 14 are moved by one auger to the vertical hole H1 side in the horizontal hole L11. Retreat. Thereafter, the same procedure is repeated, and the augers 14 are withdrawn one by one from the rear side from the horizontal hole L11 to the vertical hole H11 side, and each time the horizontal hole excavator 300 is pulled up to the ground side, and the auger 14 is collected on the ground side.
[0090]
As described above, when the excavation of the first-stage lateral hole L11 of the predetermined distance is completed and all the augers 14A and 14B are removed from the lateral hole L11 (at this point, the lateral hole excavating machine 300 is also lifted to the ground side. The horizontal telescopic arm 422 and the vertical telescopic arm 423 are actuated again to introduce an earth drill or the like into the vertical hole H1, and the excavation of the ground is resumed to relocate the vertical hole H1 as in the above (2-2). Stretch in the depth direction. The casing S is also installed. Then, when the depth of the predetermined interval in the depth direction is excavated, the excavation of the vertical hole is interrupted, and after the auger 14A is newly attached from that depth again as described in the above (3), the auger is further excavated. Excavation of the second-stage side hole L12 is performed while adding 14. When the excavation of the lateral hole L12 is completed, all the augers 14 are pulled out from the lateral hole L12 as described above. Thereafter, the same applies to the third-stage side hole L13, the fourth-stage side hole L14, and so on. FIG. 19 is a side cross-sectional view illustrating a state where a third-stage side hole L13 is excavated using the side-hole excavation machine 300 in the second embodiment of the method for purifying contaminated soil according to the present invention. The procedure described above is repeated to excavate the first horizontal hole L11, the second horizontal hole L12, the third horizontal hole L13, the fourth horizontal hole L14,.
[0091]
FIG. 20 shows a plurality (in this example, excavated) of the work machine lower region including the above-mentioned contaminated soil region R by a series of procedures of the above-described second embodiment of the method for purifying contaminated soil of the present invention. It is a sectional side view showing the situation where four) lateral holes L11, L12, L13, L14 were excavated. 20, M is a working machine and N is a building, as in FIG. In FIG. 20, after excavating four horizontal holes L11 to L14, an appropriate end plug C1 is provided at the upper end of the vertical hole H1, and one large closed space is formed by the vertical hole H and all the horizontal holes L11 to L14. One relatively large common connection pipe P1 is connected to one end plug C1, and the contaminants are sucked into the suction / purification device 600 through the vertical holes H at once from all the horizontal holes L11 to L14.
[0092]
In this case, as shown in FIG. 21, in the same manner as described with reference to FIG. 16 in the first embodiment of the present invention, the end of each of the horizontal holes L11, L12, L13, and L14 on the vertical hole H1 side. A suitable end plug C11, C12, C13, C14 is provided in the portion to seal the inside of each lateral hole L11, L12, L13, L14, and in this state, four connection pipes P11, P12, P13, and P14 are extended, and one end of each is connected to each of the end plugs C11, C12, C13, and C14, and the other end of each connection pipe P11, P12, P13, and P14 is a suction / purification device 600. May be connected.
[0093]
According to this embodiment, the same effects as those of the first embodiment of the present invention are obtained.
[0094]
That is, in the present embodiment, after the vertical hole H is excavated by the vertical hole excavating machines 200A, 200B, etc., the horizontal hole excavating machine 300 in which the auger 14A or the auger 14B having a length smaller than the diameter of the vertical hole H is attached to the vertical hole H. Are arranged, and a plurality of augers 14 are sequentially added to the side hole excavating machine 300 to excavate the side hole L. Then, after removing the auger 14 from the horizontal hole L and taking out the horizontal hole excavating machine 300 from the vertical hole H, the connection pipe P1 is airtightly connected to the vertical hole H, and the suction and purification device 600 is used to remove contaminants from the horizontal holes L11 to L14 and the vertical hole. Suction is performed via H, and the purification processing unit of the suction / purification device 600 performs the purification process.
[0095]
As described above, by adopting a configuration in which the short holes augers 14A and 14B are added to excavate the horizontal hole L and the augers 14A and 14B are added and the horizontal hole L is excavated to suck the contaminants, the present embodiment is also applicable. Similarly to the first embodiment of the present invention, after lowering the horizontal hole excavating machine 300 having the auger 14 mounted on the ground side into the vertical hole H, the augers 14A and 14B are rotated by remote control from the ground. Thus, the horizontal hole L is excavated at a predetermined distance, and after the excavation, the augers 14A and 14B are similarly sequentially lifted up to the vertical hole H by remote control from the ground. As a result, similarly to the first embodiment, the diameter of the vertical hole H can be significantly reduced as compared with the related art. As a result, the vertical hole construction space can be relatively easily formed in the factory site without affecting the operation of the factory. Can be secured. Further, even in the case where there are a large number of small purification target areas, all of them can be efficiently and finely and sufficiently purified within a short construction period.
[0096]
In the second embodiment of the present invention, the auger 14 is simply pulled out after the lateral hole L is excavated. However, the present invention is not limited to this. A pipe (tube) having an (opening) may be separately inserted and arranged.
[0097]
FIGS. 22 to 24 show such modified examples. As shown in FIG. 22, another vertical hole H′1 is placed at a position substantially opposite to the vertical hole H1 with the contaminated region R interposed therebetween (the vertical hole H1 and the vertical hole H1). The excavation is performed first (in a similar manner), and the distal end side of the tube T wound in advance on the tube unwinding device U is introduced into the vertical hole H′1. After that, the horizontal holes L11 to L14 are sequentially excavated by the method described above so as to penetrate from the vertical hole H1 to the vertical hole H1 ', and when the auger 14 is sequentially pulled out to the horizontal hole excavating machine 300 at the end of the excavation as described above. By fixing the distal end of the tube T to the forefront of the auger 14, the tube T is also drawn into the side holes L11 to L14 and inserted and arranged. FIG. 23 shows a state in which the tubes T11, T12, T13, and T14 have been arranged in the respective lateral holes L11 to L14.
[0098]
Thereafter, as shown in FIG. 24, end plugs CL11, CR11 to CL14, and CR14 are attached to both ends of the tubes T11 to T14, and four connection pipes P11 from the ground side are further attached to the end plugs CL11 to CL14 on the vertical hole H1 side. , P12, P13, and P14 are connected and communicated, and the other ends of the connection pipes P11, P12, P13, and P14 are connected to the suction / purification device 600 for suction. Each of the tubes T11 to T14 is provided with a large number of communication holes (openings) at appropriate locations (at least locations corresponding to the contaminated regions R), and contaminants taken in from these tubes T11 to T14 → The gas is introduced into the suction / purification device 600 via the connection pipes P11 to P14 and subjected to purification processing. As shown in FIG. 20, one large end plug may be provided at the upper end of the vertical hole H and connected to the suction / purification device 600.
[0099]
According to this modification, the same effect as in the second embodiment can be obtained.
[0100]
In the above, when the vertical distribution of soil contaminants at the position corresponding to one vertical hole H1 is obtained, another vertical hole H2, H3,... The same purification treatment was performed using a horizontal hole excavated from a vertical hole, and as a result, an orthogonal mesh-like purification treatment point was set in a horizontal section. However, the mesh shape is not limited to this, and another mesh shape may be used.
[0101]
That is, for example, only one vertical hole H1 is excavated, and a plurality of first-stage horizontal holes L11 are radially and equiangularly spaced at respective positions at predetermined intervals in the depth direction of the vertical hole H1. The purification process may be performed by excavating a plurality of side holes L12, a plurality of third-stage side holes L13, and a plurality of fourth-stage side holes L14. In this case, the same effect as described above is obtained.
[0102]
【The invention's effect】
According to the present invention, since a horizontal hole can be excavated and contaminants can be suctioned without a worker entering into the vertical hole, the diameter of the vertical hole is significantly reduced as compared with the related art, for example, about several tens of centimeters. It becomes possible to. As a result, it is possible to relatively easily secure the vertical hole construction space in the factory site without affecting the operation of the factory. Also, for example, even when a large number of small-scale purification target areas are present, a vertical hole is excavated in the vicinity of each area and can be easily reached with a horizontal hole shorter than the vertical hole. All of them can be efficiently and finely and sufficiently purified.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a state in which machines and equipment are transported by a self-propelled vehicle in a first embodiment of a method for purifying contaminated soil according to the present invention.
FIG. 2 is a side sectional view showing a state during cutting in the first embodiment of the method for purifying contaminated soil according to the present invention.
FIG. 3 is a plan view illustrating a state in which a horizontal telescopic arm is rotated in the first embodiment of the method for purifying contaminated soil according to the present invention.
FIG. 4 is a side sectional view showing a state of excavating a vertical hole in the first embodiment of the method for purifying contaminated soil according to the present invention.
FIG. 5 is a front view illustrating a configuration of a side-hole excavating machine used in the first embodiment of the method for purifying contaminated soil according to the present invention.
FIG. 6 is a side sectional view showing a configuration of a side-hole excavating machine used in the first embodiment of the method for purifying contaminated soil according to the present invention.
FIG. 7 is a horizontal sectional view illustrating a detailed configuration of a side-hole excavating machine used in the first embodiment of the method for purifying contaminated soil according to the present invention.
FIG. 8 is a side cross-sectional view illustrating an internal configuration of a rotary drive device constituting the side-hole excavating machine in the first embodiment of the method for purifying contaminated soil according to the present invention.
FIG. 9 is a side view showing a detailed structure of an auger constituting a digging tool of the side-hole digging machine in the first embodiment of the method for purifying contaminated soil according to the present invention.
FIG. 10 is an exploded vertical sectional view showing a detailed structure of an auger constituting a drilling tool of a horizontal hole drilling machine in the first embodiment of the method for purifying contaminated soil according to the present invention.
FIG. 11 is a front view of a rotary drive device constituting a side-hole excavating machine in the first embodiment of the method for purifying contaminated soil according to the present invention, as viewed from the front side.
FIG. 12 is a side cross-sectional view showing a state when a horizontal hole excavating machine is carried into a vertical hole and horizontal hole excavation is started in the first embodiment of the method for purifying contaminated soil according to the present invention.
FIG. 13 is a side sectional view showing a state when excavation is performed by a side-hole excavation machine in the first embodiment of the method for purifying contaminated soil according to the present invention.
FIG. 14 is a side cross-sectional view illustrating a state where a plurality of horizontal holes are sequentially excavated by a horizontal hole excavating machine in the first embodiment of the method for purifying contaminated soil according to the present invention.
FIG. 15 is a side sectional view showing a situation in which a plurality of lateral holes are excavated in a lower region of a work machine including a contaminated soil region by a series of procedures of one embodiment of the method for purifying contaminated soil according to the present invention.
[FIG. 16] In the first embodiment of the method for purifying contaminated soil according to the present invention, suction of soil contaminants in the ground through each auger buried in all the lateral holes drilled using the lateral hole drilling machine. FIG.
FIG. 17 is a side sectional view showing a modification in which the propulsion pipe is pushed into the side hole to dispose the propulsion pipe in the first embodiment of the method for purifying contaminated soil according to the present invention.
FIG. 18 is a side sectional view showing a state in which the installation of the propulsion pipes is completed in a modification of the first embodiment of the method for purifying contaminated soil according to the present invention in which the propulsion pipes are provided in the side holes. .
FIG. 19 is a side sectional view showing a state where a side hole is excavated using a side hole excavation machine in the second embodiment of the method for purifying contaminated soil according to the present invention.
FIG. 20 shows a state in which a plurality of lateral holes are excavated in the lower region of the work machine including the above-mentioned contaminated soil region by a series of procedures of the second embodiment of the method for purifying contaminated soil according to the present invention. FIG.
FIG. 21 is a longitudinal sectional view showing a modification of the second embodiment in which an end plug is provided at a vertical hole side end of each horizontal hole.
FIG. 22 is a longitudinal sectional view showing a modification of the second embodiment in which a pipe having a communication hole in each horizontal hole is inserted and arranged.
FIG. 23 is a vertical cross-sectional view illustrating a modification of the second embodiment in which a pipe having a communication hole in each horizontal hole is inserted and arranged.
FIG. 24 is a longitudinal sectional view showing a modification of the second embodiment in which a pipe having a communication hole in each horizontal hole is inserted and arranged.
[Explanation of symbols]
9 Double frame
11 Guide frame
14A Auger (Drilling Tool)
14a Tail end (gripping part on the rear end side)
14B Auger (Drilling Tool)
14r hollow hole
15 Rotary drive
19 Hydraulic motor for traversing
22 Fixed chuck device
23, 24 nails
100 self-propelled vehicle
200 vertical hole drilling machine
300 Side Hole Drilling Machine
421 swivel support
422 horizontal telescopic arm
423 Vertical Telescopic Arm
600 Suction / purification device
C end plug
H vertical hole
L side hole
N Building
T tube

Claims

In a contaminated soil purification treatment system that performs contaminated soil purification treatment,
Vertical drilling machine,
The excavator is disposed in a vertical hole drilled by the vertical hole drilling machine, and has a hollow hole for sucking a contaminant from contaminated soil to be purified, and has a drilling tool having a length smaller than the diameter of the vertical hole, and a plurality of the excavators. And a side hole excavation machine for excavating a side hole while sequentially adding tools.

In a contaminated soil purification treatment system that performs contaminated soil purification treatment,
Vertical drilling machine,
The excavator is disposed in a vertical hole excavated by the vertical hole excavating machine, has a hollow hole for sucking contaminants from contaminated soil to be purified, and has a drilling tool having a length smaller than the diameter of the vertical hole, and a plurality of the excavators. A side hole excavation machine that excavates a side hole while sequentially adding tools,
A purification system for contaminated soil, comprising: a self-propelled vehicle that loads and transports the vertical hole excavator and the horizontal hole excavator.

In the purification treatment system for contaminated soil according to any one of claims 1 and 2,
The contaminated soil further comprising a suction machine disposed on the ground side outside the vertical hole and connected to the hollow hole of the excavator, and suctioning and collecting contaminants in the contaminated soil through the hollow hole. Purification system.

The purification treatment system for contaminated soil according to claim 3,
A system for purifying contaminated soil, further comprising a processing means for purifying contaminants collected by suction by the suction machine.

In a contaminated soil purification treatment system that performs contaminated soil purification treatment,
Vertical drilling machine,
A side hole excavating machine that is arranged in a vertical hole excavated by this vertical hole excavating machine, has a drilling tool having a length smaller than the diameter of the vertical hole, and excavates a horizontal hole while sequentially adding a plurality of the drilling tools,
And a suction means that is airtightly connected to the vertical hole or the horizontal hole or a pipe inserted and disposed in the horizontal hole, and suctions contaminants taken in from the contaminated soil to be purified through the horizontal hole or the pipe. Purification system for contaminated soil.

In a contaminated soil purification treatment system that performs contaminated soil purification treatment,
Vertical drilling machine,
A side hole excavating machine that is arranged in a vertical hole excavated by this vertical hole excavating machine, has a drilling tool having a length smaller than the diameter of the vertical hole, and excavates a horizontal hole while sequentially adding a plurality of the drilling tools,
A suction means airtightly connected to the vertical hole or the horizontal hole or a pipe inserted and disposed in the horizontal hole, and a suction means for sucking contaminants taken in from the contaminated soil to be purified through the horizontal hole or the pipe, the vertical hole drilling machine, and the horizontal hole; A system for purifying contaminated soil, comprising: an excavating machine; and a self-propelled vehicle that carries and carries the suction unit.

The purification system for contaminated soil according to claim 2 or 6,
A turning support stand arranged in the self-propelled vehicle,
A horizontal telescopic arm rotatably supported by the turning support table,
A vertical telescopic arm provided on this horizontal telescopic arm,
The vertical hole excavating machine is provided on the vertical telescopic arm so as to be detachable.

In the purification system for contaminated soil according to any one of claims 1, 2, 5, and 6,
Elevating the vertical hole drilled by the vertical hole drilling machine, comprising a lifting frame mounted with the horizontal hole drilling machine,
The side hole drilling machine is
A rotation drive device provided on the lifting frame to rotate the excavator,
And a traversing device that reciprocates the rotary drive device back and forth.

The purification treatment system for contaminated soil according to claim 8,
A fixed chuck device having a plurality of gripping claws for gripping a rear end side grip portion of the preceding excavation tool,
A contaminated soil purification treatment system comprising: a plurality of grasping claws for grasping a rear end side grasping portion of the excavating tool in a following row; and a rotary chuck device rotated by the rotary drive device. .

The purification system for contaminated soil according to claim 5 or 6,
A purification system for contaminated soil, further comprising a treatment unit for purifying the pollutant collected by the suction unit.

Drilling a vertical hole with a vertical hole drilling machine,
Placing a horizontal hole drilling machine with a detachable drilling tool of a length smaller than the diameter of the vertical hole in the vertical hole,
After digging a side hole by rotating the plurality of digging tools sequentially with the side hole drilling machine,
A method for purifying contaminated soil, wherein the contaminant in the contaminated soil is sucked through a hollow hole provided in the excavator while the excavator is not rotating, and collected on the ground side outside the vertical hole.

Drilling a vertical hole with a vertical hole drilling machine,
Lowering a horizontal hole drilling machine equipped with a detachable drilling tool of a length smaller than the diameter of the vertical hole into the vertical hole,
The side hole excavation machine is operated from the ground to rotate the excavator and excavate a side hole of a predetermined distance corresponding to the length of the excavator,
The side hole excavation machine is operated from the ground to stop the rotation of the excavation tool, and the side hole excavation machine is operated from the ground to separate the excavation tool from the side hole excavation machine and remain in the side hole,
Lifting the side hole drilling machine onto the vertical hole,
A new drilling tool connected to the drilling tool left in the side hole is mounted on the raised side hole drilling machine,
Lowering the horizontal hole drilling machine again into the vertical hole, operating the horizontal hole drilling machine from the ground and connecting the new drilling tool to the drilling tool remaining in the horizontal hole,
The new excavator and the remaining excavator are rotated by operating the lateral excavator from the ground to excavate a lateral hole of a predetermined distance corresponding to the length of the new excavator,
The side hole drilling machine is operated from the ground to stop the rotation, and in the stopped state, the side hole drilling machine is operated from the ground to release the new excavation tool from the side hole drilling machine and into the side hole. Leave behind
Thereafter, in the same manner as described above, further new drilling tools are added, and a plurality of drilling tools are penetrated and extended in a predetermined range of contaminated soil,
In a non-rotating state of the plurality of drilling tools, the sampling hole is provided through a sampling hole provided in at least one surface of the plurality of drilling tools and a hollow hole provided in the drilling tool so as to communicate with the sampling hole. A method for purifying contaminated soil, wherein a contaminant in surrounding contaminated soil is suctioned and collected on the ground side outside the vertical hole.

A method for purifying contaminated soil for purifying contaminants in contaminated soil within a predetermined range located below a building,
Drilling a vertical hole in the building by loading a vertical hole drilling machine into the building,
Lowering a horizontal hole drilling machine equipped with a detachable drilling tool of a length smaller than the diameter of the vertical hole into the vertical hole,
The side hole excavation machine is operated from the ground side in the building to rotate the excavation tool and excavate a side hole of a predetermined distance corresponding to the length of the excavation tool,
The side hole excavation machine is operated from the ground side in the building to stop the rotation of the excavation tool, and the side hole excavation machine is operated from the ground side in the building to move the excavation tool from the side hole excavation machine. Detach and leave in the side hole,
Lifting the side hole drilling machine onto the vertical hole,
A new drilling tool connected to the drilling tool left in the side hole is mounted on the raised side hole drilling machine,
Lowering the horizontal hole drilling machine again into the vertical hole, operating the horizontal hole drilling machine from the ground side in the building and connecting the new drilling tool to the drilling tool left in the horizontal hole,
Operating the side hole excavation machine from the ground side in the building to rotate the new excavator and the remaining excavator to excavate a side hole of a predetermined distance corresponding to the length of the new excavator;
The side hole excavation machine is operated from the ground side in the building to stop the rotation, and, in the stopped state, the side hole excavation machine is operated from the ground side in the building to remove the new excavation tool. Leaving from the side hole drilling machine and leaving in the side hole,
Thereafter, in the same manner as described above, further new drilling tools are added, and a plurality of drilling tools are penetrated and extended in a predetermined range of contaminated soil,
In a non-rotating state of the plurality of drilling tools, the sampling hole is provided through a sampling hole provided in at least one surface of the plurality of drilling tools and a hollow hole provided in the drilling tool so as to communicate with the sampling hole. A method for purifying contaminated soil, wherein a contaminant in surrounding contaminated soil is suctioned and collected on the ground side outside the vertical hole.

Drilling a vertical hole with a vertical hole drilling machine,
Placing a horizontal hole drilling machine with a detachable drilling tool of a length smaller than the diameter of the vertical hole in the vertical hole,
After digging a side hole by rotating the plurality of digging tools sequentially with the side hole drilling machine,
Withdrawing the drilling tool from the excavated lateral hole and taking out the lateral hole excavating machine from the vertical hole,
A method for purifying contaminated soil, wherein a suction means is airtightly connected to the vertical hole or the horizontal hole, and contaminants taken in from the contaminated soil to be purified through the horizontal hole are collected by suction to the ground side.

Drilling a vertical hole with a vertical hole drilling machine,
Lowering a horizontal hole drilling machine equipped with a detachable drilling tool of a length smaller than the diameter of the vertical hole into the vertical hole,
The side hole excavation machine is operated from the ground to rotate the excavator and excavate a side hole of a predetermined distance corresponding to the length of the excavator,
The side hole excavation machine is operated from the ground to stop the rotation of the excavation tool, and the side hole excavation machine is operated from the ground to separate the excavation tool from the side hole excavation machine and remain in the side hole,
Lifting the side hole drilling machine onto the vertical hole,
A new drilling tool connected to the drilling tool left in the side hole is mounted on the raised side hole drilling machine,
Lowering the horizontal hole drilling machine again into the vertical hole, operating the horizontal hole drilling machine from the ground and connecting the new drilling tool to the drilling tool remaining in the horizontal hole,
The new excavator and the remaining excavator are rotated by operating the lateral excavator from the ground to excavate a lateral hole of a predetermined distance corresponding to the length of the new excavator,
The side hole drilling machine is operated from the ground to stop the rotation, and in the stopped state, the side hole drilling machine is operated from the ground to release the new excavation tool from the side hole drilling machine and into the side hole. Leave behind
Thereafter, in the same manner as above, further new digging tools are added, and after a plurality of digging tools are penetrated and extended in a predetermined range of contaminated soil,
Withdrawing the plurality of drilling tools from the excavated lateral hole and taking out the lateral hole excavating machine from the vertical hole,
A method for purifying contaminated soil, wherein a suction means is airtightly connected to the vertical hole or the horizontal hole, and contaminants taken in from the contaminated soil to be purified through the horizontal hole are collected by suction to the ground side.

A method for purifying contaminated soil for purifying contaminants in contaminated soil within a predetermined range located below a building,
Drilling a vertical hole with a vertical hole drilling machine,
Lowering a horizontal hole drilling machine equipped with a detachable drilling tool of a length smaller than the diameter of the vertical hole into the vertical hole,
The side hole excavation machine is operated from the ground side in the building to rotate the excavation tool and excavate a side hole of a predetermined distance corresponding to the length of the excavation tool,
The side hole excavation machine is operated from the ground side in the building to stop the rotation of the excavation tool, and the side hole excavation machine is operated from the ground side in the building to move the excavation tool from the side hole excavation machine. Detach and leave in the side hole,
Lifting the side hole drilling machine onto the vertical hole,
A new drilling tool connected to the drilling tool left in the side hole is mounted on the raised side hole drilling machine,
Lowering the horizontal hole drilling machine again into the vertical hole, operating the horizontal hole drilling machine from the ground side in the building and connecting the new drilling tool to the drilling tool left in the horizontal hole,
Operating the side hole excavation machine from the ground side in the building to rotate the new excavator and the remaining excavator to excavate a side hole of a predetermined distance corresponding to the length of the new excavator;
The side hole excavation machine is operated from the ground side in the building to stop the rotation, and, in the stopped state, the side hole excavation machine is operated from the ground side in the building to remove the new excavation tool. Leaving from the side hole drilling machine and leaving in the side hole,
Thereafter, in the same manner as above, further new digging tools are added, and after a plurality of digging tools are penetrated and extended in a predetermined range of contaminated soil,
Withdrawing the plurality of drilling tools from the excavated lateral hole and taking out the lateral hole excavating machine from the vertical hole,
A method for purifying contaminated soil, wherein a suction means is airtightly connected to the vertical hole or the horizontal hole, and contaminants taken in from the contaminated soil to be purified through the horizontal hole are collected by suction to the ground side.

Drilling a vertical hole with a vertical hole drilling machine,
Placing a horizontal hole drilling machine with a detachable drilling tool of a length smaller than the diameter of the vertical hole in the vertical hole,
After digging a side hole by rotating the plurality of digging tools sequentially with the side hole drilling machine,
Withdrawing the drilling tool from the excavated lateral hole and taking out the lateral hole excavating machine from the vertical hole,
In the side hole, a pipe having an opening in a contaminated soil region to be subjected to purification treatment is inserted and arranged,
A method for purifying contaminated soil, wherein a suction means is connected to the vertical hole or the pipe in an airtight manner, and contaminants taken in from the contaminated soil region through the opening are suctioned to the ground side and collected.

Drilling a vertical hole with a vertical hole drilling machine,
Lowering a horizontal hole drilling machine equipped with a detachable drilling tool of a length smaller than the diameter of the vertical hole into the vertical hole,
The side hole excavation machine is operated from the ground to rotate the excavator and excavate a side hole of a predetermined distance corresponding to the length of the excavator,
The side hole excavation machine is operated from the ground to stop the rotation of the excavation tool, and the side hole excavation machine is operated from the ground to separate the excavation tool from the side hole excavation machine and remain in the side hole,
Lifting the side hole drilling machine onto the vertical hole,
A new drilling tool connected to the drilling tool left in the side hole is mounted on the raised side hole drilling machine,
Lowering the horizontal hole drilling machine again into the vertical hole, operating the horizontal hole drilling machine from the ground and connecting the new drilling tool to the drilling tool remaining in the horizontal hole,
The new excavator and the remaining excavator are rotated by operating the lateral excavator from the ground to excavate a lateral hole of a predetermined distance corresponding to the length of the new excavator,
The side hole drilling machine is operated from the ground to stop the rotation, and in the stopped state, the side hole drilling machine is operated from the ground to release the new excavation tool from the side hole drilling machine and into the side hole. Leave behind
Thereafter, in the same manner as above, further new digging tools are added, and after a plurality of digging tools are penetrated and extended in a predetermined range of contaminated soil,
Withdrawing the plurality of drilling tools from the excavated lateral hole and taking out the lateral hole excavating machine from the vertical hole,
In the side hole, a pipe having an opening in a contaminated soil region to be subjected to purification treatment is inserted and arranged,
A method for purifying contaminated soil, wherein a suction means is connected to the vertical hole or the pipe in an airtight manner, and contaminants taken in from the contaminated soil to be purified through the horizontal hole are collected on the ground side.

A method for purifying contaminated soil for purifying contaminants in contaminated soil within a predetermined range located below a building,
Drilling a vertical hole with a vertical hole drilling machine,
Lowering a horizontal hole drilling machine equipped with a detachable drilling tool of a length smaller than the diameter of the vertical hole into the vertical hole,
The side hole excavation machine is operated from the ground side in the building to rotate the excavation tool and excavate a side hole of a predetermined distance corresponding to the length of the excavation tool,
The side hole excavation machine is operated from the ground side in the building to stop the rotation of the excavation tool, and the side hole excavation machine is operated from the ground side in the building to move the excavation tool from the side hole excavation machine. Detach and leave in the side hole,
Lifting the side hole drilling machine onto the vertical hole,
A new drilling tool connected to the drilling tool left in the side hole is mounted on the raised side hole drilling machine,
Lowering the horizontal hole drilling machine again into the vertical hole, operating the horizontal hole drilling machine from the ground side in the building and connecting the new drilling tool to the drilling tool left in the horizontal hole,
Operating the side hole excavation machine from the ground side in the building to rotate the new excavator and the remaining excavator to excavate a side hole of a predetermined distance corresponding to the length of the new excavator;
The side hole excavation machine is operated from the ground side in the building to stop the rotation, and, in the stopped state, the side hole excavation machine is operated from the ground side in the building to remove the new excavation tool. Leaving from the side hole drilling machine and leaving in the side hole,
Thereafter, in the same manner as above, further new digging tools are added, and after a plurality of digging tools are penetrated and extended in a predetermined range of contaminated soil,
Withdrawing the plurality of drilling tools from the excavated lateral hole and taking out the lateral hole excavating machine from the vertical hole,
In the side hole, a pipe having an opening in a contaminated soil region to be subjected to purification treatment is inserted and arranged,
A method for purifying contaminated soil, wherein a suction means is connected to the vertical hole or the pipe in an airtight manner, and contaminants taken in from the contaminated soil to be purified through the horizontal hole are collected on the ground side.

The method for purifying contaminated soil according to any one of claims 11 to 19,
A method for purifying contaminated soil, wherein the collected contaminants are purified by processing means provided on the ground side outside the vertical hole.