JP2003082976A - Excavating tool for investigating surface layer pollution and geological pollution investigating method - Google Patents
Excavating tool for investigating surface layer pollution and geological pollution investigating methodInfo
- Publication number
- JP2003082976A JP2003082976A JP2001268002A JP2001268002A JP2003082976A JP 2003082976 A JP2003082976 A JP 2003082976A JP 2001268002 A JP2001268002 A JP 2001268002A JP 2001268002 A JP2001268002 A JP 2001268002A JP 2003082976 A JP2003082976 A JP 2003082976A
- Authority
- JP
- Japan
- Prior art keywords
- underground
- ventilation hole
- excavation
- hole
- drill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、地盤の比較的表層
の地質汚染調査用の掘削工具及び調査方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling tool and a surveying method for surveying geological contamination of a relatively surface layer of the ground.
【０００２】[0002]
【従来の技術】地盤の比較的表層の地質汚染調査方法に
は、これまで掘削した後で掘削孔に地下空気採取管を挿
入して地下空気を採取する表層汚染調査方法が普及して
いる。しかし、掘削途中のドリル内部空間を利用した本
発明のような特徴を有する表層汚染調査方法はない。ま
た、ドリルビットの切刃に掘削用送水孔が設けられてい
るが、地下空気採取管の先端と通気孔を気密に維持した
状態で連通するような構成の本発明の如き特徴を有する
掘削ビットは見当たらない。2. Description of the Related Art As a method for investigating the geological pollution of a relatively surface layer of the ground, a surface pollution investigating method has been popular, in which an underground air sampling pipe is inserted into an excavation hole and then underground air is sampled. However, there is no surface contamination investigation method having the features of the present invention that utilizes the internal space of the drill during excavation. Further, although the cutting edge of the drill bit is provided with a water hole for excavation, the excavation bit having the feature of the present invention is configured so that the tip of the underground air sampling pipe and the vent hole are communicated with each other in an airtight state. Is not found.
【０００３】[0003]
【発明が解決しようとする課題】このような従来の技術
には次のような欠点があった。
（１）掘削した後で掘削孔に地下空気採取管を挿入して
地下空気を採取する表層汚染調査方法は、崩壊性の高い
地層では、掘削孔が埋め戻され、空気採取そのものが不
可能になるケースが多かった。また、崩壊のない場合で
も、掘削途中の掘削孔において多ポイントの深度で地下
空気を採取する場合、各深度での採取の度にドリルロッ
ドを抜管する必要があり、低効率かつ不経済であった。
（２）従来のドリルビットなどを使用して、地上から地
下空気採取管を挿入して地下空気を採取する場合、通気
孔と空気採取管が気密を維持していないため、対象とす
る地下位置の空気ではなく、ロッド内の地上空気を混入
採取してしまい、調査の目的を果すことができない。However, such a conventional technique has the following drawbacks. (1) In the surface pollution investigation method, in which the underground air sampling pipe is inserted into the drill hole after the excavation to collect the underground air, the drill hole is backfilled in the highly collapsible stratum, and the air sampling itself becomes impossible. There were many cases where Even if there is no collapse, if underground air is collected at multiple points in the drilling hole during excavation, the drill rod must be extubated at each depth, which is low efficiency and uneconomical. It was (2) When using a conventional drill bit etc. to insert underground air sampling pipes from the ground to collect underground air, the ventilation holes and air sampling pipes do not maintain airtightness, so the target underground position The ground air in the rod is mixed and collected instead of the above air, and the purpose of the investigation cannot be achieved.
【０００４】（３）従来のいずれの方式も汚染の状況を
確認しながら掘削作業を行うことができないため、通常
は予定深度まで掘削作業を行い、汚染状況によっては深
度不足と判断されて再掘削を行う。すなわち、汚染状況
に応じて予定深度を増減することができないため、深度
に過不足が生じ非常に不経済である。(3) Since none of the conventional methods can carry out the excavation work while confirming the state of pollution, normally the excavation work is carried out to the planned depth, and depending on the pollution situation, it is judged that the depth is insufficient and re-excavation is carried out. I do. In other words, the planned depth cannot be increased or decreased according to the pollution situation, and therefore the depth becomes excessive and deficient, which is very uneconomical.
【０００５】本発明の目的は、上記従来の問題点を解決
すべく、任意の深度で、孔壁崩壊がなく、簡便かつ短時
間に正確な調査ができる高効率な地質表層汚染調査用掘
削工具及び調査方法を提供することにある。An object of the present invention is to solve the above-mentioned conventional problems, and a highly efficient drilling tool for geological surface contamination investigation which can perform accurate investigation easily and in a short time at any depth without collapse of hole walls. And to provide a survey method.
【０００６】[0006]
【課題を解決するための手段】本発明は、前記問題を解
決するために、先端に設けられた硬質材料からなる切刃
と、後端に設けられ、掘削機のドリルヘッドのスピンド
ルあるいはドリルロッドなどに係脱自在に接続されるカ
ップリングと、切刃及びカップリングの間に配置され、
下方部に外部と連通する地下通気孔及び地下通気孔内へ
の土砂の進入を防止するための開閉自在な弁を有する胴
体部とによって表層汚染調査用掘削ビットが構成されて
おり、前記胴体部は、後端開口部から内部に挿入される
地下空気採取管の先端部が前記地下通気孔と気密に維持
されて連通できるように構成した。In order to solve the above problems, the present invention provides a cutting blade made of a hard material at the tip and a spindle or a drill rod of a drill head of an excavator provided at the rear end. Is placed between the cutting blade and the coupling, and the coupling that is detachably connected to the
The underground bite communicating with the outside in the lower part and the body part having a valve that can be opened and closed to prevent the entry of sediment into the underground air hole constitute a drill bit for surface pollution investigation, and the body part Is configured so that the tip end portion of the underground air sampling pipe inserted into the inside from the rear end opening portion is maintained airtight with the underground ventilation hole and can communicate with the underground ventilation hole.
【０００７】また、前記地下通気孔の弁は、前記胴体部
内の地下通気孔の上部に設けられ、地下通気孔に形成さ
れた弁座と、この弁座内に挿通されて、弁座と密着する
ように形成され、前記弁座と気密にかつ上下方向に摺動
自在に嵌合された弁体と、前記地下通気孔を密閉するよ
うに弁体を上方に付勢する付勢部材とから構成され、前
記胴体部の後端内部から挿入された地下空気採取管によ
り付勢部材が収縮して弁体が下方に押し出され、弁座及
び地下通気孔が開放される構造であることを特徴とす
る。The valve of the underground ventilation hole is provided in the upper portion of the underground ventilation hole in the body portion, and the valve seat formed in the underground ventilation hole is inserted into the valve seat to be in close contact with the valve seat. And a biasing member that biases the valve body upward so as to seal the underground ventilation hole. It is configured such that the urging member is contracted by the underground air collecting pipe inserted from the inside of the rear end of the body portion, the valve body is pushed downward, and the valve seat and the underground ventilation hole are opened. And
【０００８】また、前記地下通気孔の弁は、地下通気孔
を開閉自在にスライドするシャッタであって、前記シャ
ッタは、外接円径が掘削孔径に近似して形成され、前記
表層汚染調査用掘削ビットの胴体部の下方に配設され
て、掘削機により表層汚染調査用掘削ビットが下方に給
進されるとき、掘削孔の内壁との摩擦力により上方にス
ライドして前記地下通気孔を閉塞し、表層汚染調査用掘
削ビットが上方に引上げられるとき、掘削孔の内壁との
摩擦力により下方にスライドして前記地下通気孔を開放
するように構成されていることを特徴とする。Further, the valve of the underground ventilation hole is a shutter which slides the underground ventilation hole openably and closably, and the shutter is formed such that the circumscribed circle diameter is close to the diameter of the excavation hole, and the excavation for surface layer contamination investigation is performed. When the excavator drives the excavation bit for surface pollution downward, it is installed below the body of the bit and slides upward due to the frictional force with the inner wall of the excavation hole to close the underground ventilation hole. However, when the excavation bit for surface contamination investigation is pulled upward, it slides downward due to frictional force with the inner wall of the excavation hole to open the underground ventilation hole.
【０００９】また、以上に記載の表層汚染調査用掘削工
具を使用して、掘削の原位置で任意の深度の地下空気を
採取することを特徴とする。Further, the above-mentioned excavation tool for surface contamination investigation is used to collect underground air at an arbitrary depth at an original position of excavation.
【００１０】また、前記ドリルロッド及び前記胴体部の
内部に昇降自在に挿入され、先端部にガス検知管とその
上方に錘とを脱着可能に取付けた軟質材料の延長採取管
とを備えた地下空気採取管を用いて、掘削の原位置で任
意の深度の地下空気を採取することを特徴とする。[0010] Further, the underground which is inserted into the inside of the drill rod and the body part so as to be able to move up and down, and has a gas detection pipe at a tip end thereof and an extension sampling pipe of a soft material to which a weight is detachably attached above the gas detection pipe. The feature is that the air sampling pipe is used to sample underground air at an arbitrary depth at the original position of excavation.
【００１１】[0011]
【発明の実施の形態】以下、本発明の好ましい一実施の
形態について、添付図面を参照し詳細に説明する。本発
明の一実施の形態による表層汚染調査用掘削工具は、図
１に図示したように、先端に設けられた硬質材料からな
る切刃２ｂと、後端に設けられ、ピンなどの固定部材７
により、後述する図７乃至図１３に示す簡易型掘削機
（ポータブルドリル）３０のドリルヘッド３４のスピン
ドル３４ａに係脱自在に接続される第１カップリング８
と、切刃２ｂ及び第１カップリング８の間に配置され、
下方部に外部と連通する地下通気孔２ｅ及び地下通気孔
２ｅ内への土砂の進入を防止するための開閉自在な弁９
を有する胴体部とによって地盤の表層汚染調査用掘削ビ
ット１が構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. As shown in FIG. 1, a drilling tool for surface contamination investigation according to an embodiment of the present invention has a cutting edge 2b made of a hard material provided at a tip and a fixing member 7 such as a pin provided at a rear end.
Thus, the first coupling 8 detachably connected to the spindle 34a of the drill head 34 of the simple excavator (portable drill) 30 shown in FIGS.
And is arranged between the cutting edge 2b and the first coupling 8,
An underground ventilation hole 2e communicating with the outside in the lower part and an openable / closable valve 9 for preventing the entry of sediment into the underground ventilation hole 2e.
The excavation bit 1 for surveying the surface contamination of the ground is constituted by the body portion having the.
【００１２】前記胴体部は、先端の切刃２ｂを有するビ
ット２のビット後部２ｃと、ビット後部２ｃの後端のネ
ジ部２ｄと螺着したビットアダプタ４と、ビットアダプ
タ４の後端のネジ部４ａと螺着したロッド５と、ロッド
５の後端のネジ部５ａと螺着した第２カップリング６と
から構成され、いずれも図４に示すように、後述する地
下空気採取管１０が挿入されるような中空構造である。The body portion includes a bit rear portion 2c of a bit 2 having a cutting edge 2b at the front end, a bit adapter 4 screwed to a screw portion 2d at the rear end of the bit rear portion 2c, and a screw at the rear end of the bit adapter 4. The rod 4 is screwed to the portion 4a, and the second coupling 6 is screwed to the screw portion 5a at the rear end of the rod 5. As shown in FIG. It is a hollow structure that can be inserted.
【００１３】また、第１カップリング８が、その先端に
設けられた連結孔８ａと第２カップリング６の後端の連
結孔６ｂとに挿通されたピンなどの固定部材７により第
２カップリング６と連結されている。そして、第２カッ
プリング６とロッド５との間に所定長さの中空構造のド
リルロッド（後述する図１３の５ｘ）を継足し連結（螺
着）することができる。The first coupling 8 is fixed to the second coupling 6 by means of a fixing member 7 such as a pin inserted through a connecting hole 8a provided at the tip of the first coupling 8 and a connecting hole 6b at the rear end of the second coupling 6. 6 is connected. Then, between the second coupling 6 and the rod 5, a hollow-structured drill rod (5x in FIG. 13 described later) having a predetermined length can be added and connected (screwed).
【００１４】固定部材７は、図１及び図３に示すよう
に、先端部に抜け止めピン７ｄ用孔７ｃが設けられてい
る。また、固定部材７は、第１カップリング８とともに
頻繁に係脱されるので紛失防止のため、後端に、例え
ば、端末にスナップピン７ｂが取付けられたゴムチュー
ブ７ａが連結されている。As shown in FIGS. 1 and 3, the fixing member 7 is provided with a retaining pin 7d hole 7c at its tip. Further, since the fixing member 7 is frequently engaged and disengaged with the first coupling 8, a rubber tube 7a having a snap pin 7b attached to a terminal is connected to the rear end thereof in order to prevent loss.
【００１５】ビット２のビット先端部２ａは、図１及び
図２に示すように、対向する２つの略１／４円形断面部
が切り落とされたカット面２ｆを有し、掘削し易い構造
を有している。As shown in FIGS. 1 and 2, the bit tip end portion 2a of the bit 2 has a cut surface 2f in which two opposing approximately 1/4 circular cross-sections are cut off, and has a structure that facilitates excavation. is doing.
【００１６】さらに、前記胴体部は、所定の位置まで掘
削された所で、第１カップリング８が取外された後、図
４及び図５に示すように、胴体部の後端である第２カッ
プリング６の後端の開口部６ａから内部に挿入され、地
上から地下空気を吸引採取するための地下空気採取管
（ダウンホールテスタともいう）１０の検知管１１の先
端部１１ａが地下通気孔２ｅと気密に維持されて連通で
きるように構成されている。Furthermore, after the first coupling 8 is removed from the body portion after excavation to a predetermined position, as shown in FIGS. 4 and 5, the body portion is the rear end of the body portion. The tip end 11a of the detection pipe 11 of the underground air sampling pipe (also referred to as a downhole tester) 10 that is inserted into the inside of the opening 6a at the rear end of the 2 coupling 6 and suctions and collects underground air from the ground. It is configured so that it can maintain airtightness and communicate with the pores 2e.
【００１７】すなわち、地下通気孔２ｅと気密を維持す
る機構は、図５に示すように、挿入された地下空気採取
管１０の検知管１１の先端１１ａ外周面と、ビット後部
２ｃ内に挿入して設けられた通気流路３ａを有する中空
状のゴムなどの軟質材料からなるシート３の先端部に設
けられ、地下通気孔２ｅに交叉して連通する連通孔３ｂ
とが気密に接触するバルブ機構である。なお、シート３
の通気流路３ａの後端部は、末広がりのテーパ面３ｃが
形成されており、検知管１１の挿入案内面の機能を有し
ている。That is, as shown in FIG. 5, the mechanism for maintaining the airtightness with the underground ventilation hole 2e is inserted into the outer peripheral surface of the tip 11a of the detecting pipe 11 of the inserted underground air collecting pipe 10 and the bit rear part 2c. A communication hole 3b that is provided at the tip of the sheet 3 made of a soft material such as hollow rubber having the ventilation channel 3a provided therein and that communicates by intersecting with the underground ventilation hole 2e.
Is a valve mechanism that makes airtight contact with. Sheet 3
The rear end portion of the ventilation channel 3a is formed with a taper surface 3c that widens toward the end and has a function of an insertion guide surface of the detection tube 11.
【００１８】また、ビット後部２ｃの外周には、地下通
気孔２ｅを開閉自在にスライドして掘屑の進入を防止す
るための筒状のシャッタ９が設けられている。このシャ
ッタ９が、前記の弁９である。On the outer periphery of the bit rear portion 2c, there is provided a cylindrical shutter 9 for slidingly opening and closing the underground ventilation hole 2e to prevent the entry of cuttings. The shutter 9 is the valve 9 described above.
【００１９】シャッタ９は、少なくとも外径の一部、例
えば図４及び図５に示すように、先端外面に設けられた
複数（少なくとも３個以上）の突起部９ａが掘削孔Ｇａ
の内壁に接触する円筒形状を有し、表層汚染調査用掘削
ビット１の胴体部下方であるビット後部２ｃの外周に挿
通されており、図７乃至図１３に示す簡易型掘削機（ポ
ータブルドリル）３０のドリルヘッド３４により表層汚
染調査用掘削ビット１が下方に給進される（又は掘削す
る）ときは、図１に示すように、掘削孔Ｇａ内壁の土圧
（摩擦力）によりシャッタ９が上方にスライドして、地
下通気孔２ｅを閉塞し掘屑の進入を防止する。The shutter 9 has at least a part of its outer diameter, for example, as shown in FIGS. 4 and 5, a plurality of (at least three or more) protrusions 9a provided on the outer surface of the tip end of the excavation hole Ga.
Has a cylindrical shape that comes into contact with the inner wall of the drill, and is inserted into the outer periphery of the bit rear portion 2c below the body of the drill bit 1 for surface contamination investigation, and is a simple excavator (portable drill) shown in FIGS. 7 to 13. When the excavation bit 1 for surface contamination investigation is fed downward (or excavated) by the drill head 34 of 30, as shown in FIG. 1, the shutter 9 is moved by the earth pressure (friction force) on the inner wall of the excavation hole Ga. By sliding upward, the underground ventilation hole 2e is closed to prevent intrusion of cuttings.
【００２０】一方、所定の深度の掘削孔Ｇａ内でドリル
ヘッド３４により表層汚染調査用掘削ビット１が上方に
引上げられるときには、図４及び図５に示すように、掘
削孔Ｇａの内壁との摩擦力によりシャッタ９が下方にス
ライドして、地下通気孔２ｅが開放され地下の空気を吸
入できる状態になる。On the other hand, when the drill bit 34 for surface contamination investigation is pulled upward by the drill head 34 in the drill hole Ga having a predetermined depth, as shown in FIGS. 4 and 5, friction with the inner wall of the drill hole Ga is generated. The shutter 9 slides downward by the force, the underground ventilation hole 2e is opened, and the underground air can be sucked.
【００２１】地下空気採取管（ダウンホールテスタ）１
０は、図４乃至図６に示すように、先端から空気（ガ
ス）を吸引するガス吸引孔（図示しない）を有する検知
管１１、検知管１１とステンレス製の導管１３とを連結
するゴムチュ−ブ１２、導管１３に挿通されている錘１
４、導管１３の後端に挿通されるとともに空気（ガス）
を吸引する真空式の定量ポンプを備えた気体採取セット
１６に連結するフレキシブルチューブなどからなる延長
採取管１５から構成されている。錘１４は、検知管１１
を自重により確実に、ドリルロッド５ｘ及び表層汚染調
査用掘削ビット１の胴体部の内部に挿入し、シート３の
連通孔３ｂに密着し易いようにする役割を有している。Underground air sampling pipe (downhole tester) 1
As shown in FIGS. 4 to 6, 0 is a detection tube 11 having a gas suction hole (not shown) for sucking air (gas) from the tip, and a rubber tube connecting the detection tube 11 and the stainless steel conduit 13. Weight 12 inserted in the tube 12 and the conduit 13
4. Air (gas) that is inserted into the rear end of the conduit 13
It is composed of an extension sampling tube 15 composed of a flexible tube or the like connected to a gas sampling set 16 equipped with a vacuum type metering pump for sucking. The weight 14 is the detector tube 11
Has a role of surely being inserted into the inside of the body of the drill rod 5x and the surface layer contamination investigation drill bit 1 by its own weight so as to be easily attached to the communication hole 3b of the seat 3.
【００２２】検知管１１及び気体採取セット１６など
は、既に公知のものであるため、詳細な説明は省略す
る。Since the detector tube 11, the gas sampling set 16 and the like are already known, their detailed description will be omitted.
【００２３】また、本発明に係る他の実施の形態による
前記地下通気孔の弁について、図７乃至図１０を参照し
て説明する。図７は、本発明に係る他の実施の形態によ
る表層汚染調査用掘削工具の掘削ビット先端部の縦断面
図である。図８は図７のＤ−Ｄ矢視図、図９は図７の側
面図、図１０は、図７のＣ−Ｃ断面図である。ここで分
かり易くするため、前記図１乃至図５に示した部材と同
一機能を有する部材については、同一符号を付してい
る。A valve of the underground ventilation hole according to another embodiment of the present invention will be described with reference to FIGS. 7 to 10. FIG. 7 is a vertical cross-sectional view of a tip of a drilling bit of a drilling tool for surface contamination investigation according to another embodiment of the present invention. 8 is a view taken in the direction of arrows D-D in FIG. 7, FIG. 9 is a side view of FIG. 7, and FIG. 10 is a cross-sectional view taken along line C-C of FIG. 7. Here, for easy understanding, members having the same functions as the members shown in FIGS. 1 to 5 are designated by the same reference numerals.
【００２４】略丸棒形のビット２は、図７及び図８に示
すように、後端ネジ部２ｄが、ビットアダプタ４の先端
部にシール部材２ｉを介して気密に螺着されている。ビ
ット先端部２ａは、対向する両面部が切り落とされたカ
ット面２ｆを有する平板形状に形成され、掘削し易い構
造を有している。また、図７乃至図１０に示すように、
ビット後部２ｃに隣接してビット先端部２ａには、外部
と連通する地下通気孔２ｅが設けらている。As shown in FIGS. 7 and 8, the bit 2 having a substantially round bar shape has a rear end screw portion 2d which is hermetically screwed to the tip end portion of the bit adapter 4 via a seal member 2i. The bit tip portion 2a is formed in a flat plate shape having a cut surface 2f in which both opposing surfaces are cut off, and has a structure that facilitates excavation. In addition, as shown in FIGS.
Adjacent to the bit rear part 2c, an underground ventilation hole 2e communicating with the outside is provided in the bit tip part 2a.
【００２５】本発明に係る他の実施の形態による地下通
気孔２ｅの弁は、ビット後部２ｃ内にシール部材２ｈを
介して気密に挿設され、先端中心に設けられ地下通気孔
２ｅに連通する連通孔２ｋの先端が下方に拡開するテー
パ面を有する弁座２ｊを備えた中空状のスリーブ２ｇ
と、弁座２ｊ内に下方から挿通されて、軸９ｂの先端部
が拡径され弁座２ｊと密着するように形成されたテーパ
面９ｃを有するとともに、テーパ面９ｃの上部の軸部が
拡径された弁軸９ｅがシール部材９ｄを介して弁座２ｊ
の上部連通孔２ｋと気密にかつ上下軸方向に摺動自在に
嵌合された弁体９と、弁体９の軸９ｂの後端に止めネジ
などの固定部材９ｇを介して固設され、スリーブ２ｇ内
面に上下軸方向に摺動自在に嵌合されたスライド部材９
ｆと、軸９ｂに挿通されてスライド部材９ｆとスリーブ
２ｇの連通孔２ｋとの間に設けられ、弁座２ｊ及び連通
孔２ｋを密閉するようにスライド部材９ｆと共に弁体９
を上方に付勢するコイルスプリングなどの付勢部材９ｈ
とから構成されている。なお、弁体９の後部の軸９ｂ
は、弁軸９ｅより細く形成されている。The valve of the underground ventilation hole 2e according to another embodiment of the present invention is airtightly inserted in the bit rear portion 2c via the seal member 2h, and is provided at the center of the tip and communicates with the underground ventilation hole 2e. Hollow sleeve 2g provided with a valve seat 2j having a tapered surface where the tip of the communication hole 2k expands downward.
And has a tapered surface 9c which is inserted into the valve seat 2j from below so that the tip end of the shaft 9b is expanded in diameter so as to be in close contact with the valve seat 2j, and the shaft portion above the tapered surface 9c is expanded. The diameter of the valve shaft 9e is reduced by the valve seat 2j via the seal member 9d.
The valve body 9 fitted in the upper communication hole 2k in an airtight manner and slidably in the vertical axis direction, and fixed to the rear end of the shaft 9b of the valve body 9 via a fixing member 9g such as a set screw, A slide member 9 slidably fitted in the inner surface of the sleeve 2g in the vertical direction.
f, which is inserted between the slide member 9f and the communication hole 2k of the sleeve 2g, which is inserted into the shaft 9b, and together with the slide member 9f and the valve body 9f so as to seal the valve seat 2j and the communication hole 2k.
Biasing member 9h such as a coil spring for biasing the upper part
It consists of and. The shaft 9b at the rear of the valve body 9
Is thinner than the valve shaft 9e.
【００２６】通常時あるいは掘削時は、図７及び図９に
示すように、付勢部材９ｈが弁体９ｂ及びスライド部材
９ｆの自重を保持している伸張状態であり、弁体９ｂの
テーパ面９ｃが、地下通気孔２ｅと連通する弁座２ｊ及
び連通孔２ｋを密閉し、土砂等掘屑の進入を防止する。During normal operation or excavation, as shown in FIGS. 7 and 9, the biasing member 9h is in an extended state in which the weight of the valve body 9b and the slide member 9f is held, and the tapered surface of the valve body 9b. 9c seals the valve seat 2j and the communication hole 2k that communicate with the underground ventilation hole 2e, and prevents the entry of debris such as earth and sand.
【００２７】これに対し、図示しないが、所定の深度の
掘削孔Ｇａ内で前記胴体部の後端内部から地下空気採取
管１０を挿入し、検知管１１の先端部１１ａがビットア
ダプタ４内を経てスライド部材９ｆ又は弁体９の軸９ｂ
の後端面に接して前記地下空気採取管１０の検知管１１
及び錘１４を含む重量などが負荷される。この場合、付
勢部材９ｈの付勢力が地下空気採取管１０の前記重量よ
り充分小さく設定されているため、付勢部材９ｈが収縮
してスライド部材９ｆを介し弁体９が下方に押し出さ
れ、これによって、弁座２ｊ及び連通孔２ｋが開放され
地下の空気を吸入できる状態になる。On the other hand, although not shown, the underground air sampling pipe 10 is inserted from the inside of the rear end of the body portion inside the excavation hole Ga having a predetermined depth, and the tip portion 11a of the detection pipe 11 moves inside the bit adapter 4. Through the slide member 9f or the shaft 9b of the valve body 9
The detection pipe 11 of the underground air sampling pipe 10 in contact with the rear end face of the
The weight including the weight 14 and the weight 14 is loaded. In this case, since the urging force of the urging member 9h is set to be sufficiently smaller than the weight of the underground air sampling pipe 10, the urging member 9h contracts and the valve body 9 is pushed downward through the slide member 9f, As a result, the valve seat 2j and the communication hole 2k are opened to allow the intake of underground air.
【００２８】したがって、地下空気採取管１０を上方に
引上げると、再び付勢部材９ｇが伸張状態に復帰してス
ライド部材９ｆ及び弁体９ｂが上方に引上げられ、これ
によって、弁座２ｊ及び連通孔２ｋが密閉され、地下空
気採取管１０の先端部１１ａを含む前記胴体部内は地下
通気孔２ｅに対して気密に維持される。このように、弁
９は、前記胴体部内への地下空気採取管１０の挿入・引
上げによって、開閉操作ができる構造である。Therefore, when the underground air sampling pipe 10 is pulled upward, the biasing member 9g returns to the extended state again and the slide member 9f and the valve body 9b are pulled upward, whereby the valve seat 2j and the communication are established. The hole 2k is sealed, and the inside of the body including the tip portion 11a of the underground air sampling pipe 10 is kept airtight with respect to the underground ventilation hole 2e. Thus, the valve 9 has a structure that can be opened and closed by inserting and pulling up the underground air collecting pipe 10 into the body.
【００２９】次に、以上説明した本発明の表層汚染調査
用掘削工具を使用して、掘削の原位置で任意の深度の地
下空気を採取する表層汚染調査方法について、図１１乃
至図１７を参照して詳細に説明する。Next, referring to FIG. 11 to FIG. 17, as to the surface pollution investigation method of using the above-explained surface pollution investigation drilling tool of the present invention to collect underground air at an arbitrary depth at an original position of excavation. And will be described in detail.
【００３０】図１１乃至図１７では、一例として、地質
調査対象の所定の地盤Ｇ上にアンカー２１により固設さ
れたベース２０上に、人力で移動可能な走行台車３１に
搭載されたガイド機構３２に進退自在に装着されたドリ
ルヘッド３４を有する簡易型掘削機（ポータブルドリ
ル）３０を倒立可能に設置して使用した例を示す。11 to 17, as an example, a guide mechanism 32 mounted on a traveling carriage 31 which can be moved manually by a human is mounted on a base 20 fixed by an anchor 21 on a predetermined ground G to be geologically surveyed. An example in which a simple excavator (portable drill) 30 having a drill head 34 that is mounted so as to move back and forth is installed and used so that it can be inverted is shown.
【００３１】ドリルヘッド３４は、簡易型掘削機（ポー
タブルドリル）３０を倒立させた状態で、スピンドル３
４ａに連結された表層汚染調査用掘削ビット１に回転力
と打撃力を作用させて地盤Ｇを掘削するもので、ガイド
機構３２上を人力などで駆動する駆動機構３３により掘
削孔軸方向に給進又は後退走行する。The drill head 34 is mounted on the spindle 3 while the simple excavator (portable drill) 30 is inverted.
The excavation of the ground G is performed by exerting a rotating force and a striking force on the surface contamination investigation excavation bit 1 connected to the 4a, and is supplied in the axial direction of the excavation hole by the drive mechanism 33 that drives the guide mechanism 32 by human power or the like. Drive forward or backward.
【００３２】まず、図１１に示す第１の掘削開始工程
（工程１）では、簡易型掘削機３０を倒立させた状態
で、表層汚染調査用掘削ビット１をスピンドル３４ａに
連結し、ドリルヘッド３４を給進させながら、表層汚染
調査用掘削ビット１に回転力と打撃力を作用させて地盤
Ｇの掘削を開始する。First, in the first excavation start step (step 1) shown in FIG. 11, the excavation bit 1 for surface contamination inspection is connected to the spindle 34a while the simple excavator 30 is inverted, and the drill head 34 is used. While excavating, the rotating force and the striking force are applied to the excavation bit 1 for surface contamination investigation to start excavation of the ground G.
【００３３】次に、図１２に示す第１の掘削終了工程
（工程２）では、所定の第１の掘削孔深さまで掘削し、
第１の掘削を終了する。Next, in the first excavation end step (step 2) shown in FIG. 12, excavation is performed to a predetermined first excavation hole depth,
The first excavation is completed.
【００３４】そこで、図１３に示す弁開放工程（工程
３）では、一実施の形態（図１乃至図５）においては、
ドリルヘッド３４を僅かに後退させて表層汚染調査用掘
削ビット１を引上げる動作を行う。この時、前記図４及
び図５を参照して説明したように、掘削孔Ｇａの内壁と
の摩擦力によりシャッタ９が下方にスライドして、地下
通気孔２ｅが開放され、地下の空気を吸入できる状態に
なる。Therefore, in the valve opening step (step 3) shown in FIG. 13, in one embodiment (FIGS. 1 to 5),
The drill head 34 is slightly retracted to pull up the surface-layer contamination investigation drill bit 1. At this time, as described with reference to FIGS. 4 and 5, the shutter 9 slides downward due to the frictional force with the inner wall of the excavation hole Ga, the underground ventilation hole 2e is opened, and the underground air is taken in. Ready to go.
【００３５】その後、図１４に示す地下空気採取管（ダ
ウンホールテスタ）挿入工程（工程４）では、表層汚染
調査用掘削ビット１をスピンドル３４ａから取外した後
に簡易型掘削機３０を倒立させた状態で、表層汚染調査
用掘削ビット１の固定部材７を引抜いて第１カップリン
グ８を取外し、地下空気採取管１０の検知管１１を第２
カップリング６の後端の開口部６ａから胴体内部に挿入
する。この時、図５に示すように、検知管１１の先端部
１１ａを錘１４等の自重により確実にシート３の連通孔
３ｂに密着させ気密を維持する。Thereafter, in the underground air sampling pipe (downhole tester) insertion step (step 4) shown in FIG. 14, the simple excavator 30 is inverted after the surface contamination investigation drill bit 1 is removed from the spindle 34a. Then, the fixing member 7 of the excavation bit 1 for surface contamination investigation is pulled out, the first coupling 8 is removed, and the detection pipe 11 of the underground air sampling pipe 10 is moved to the second position.
The coupling 6 is inserted into the body through the opening 6a at the rear end. At this time, as shown in FIG. 5, the tip end portion 11a of the detection tube 11 is reliably brought into close contact with the communication hole 3b of the sheet 3 by the weight of the weight 14 or the like to maintain airtightness.
【００３６】次に、図１５に示す気体測定工程（工程
５）では、気体採取セット１６の真空式定量ポンプを作
動させて地下通気孔２ｅ、連通孔３ｂおよび検知管１１
を経由して所定の地下の空気を採取し、汚染ガス等を分
析・測定する。Next, in the gas measuring step (step 5) shown in FIG. 15, the vacuum metering pump of the gas sampling set 16 is operated to operate the underground ventilation hole 2e, the communication hole 3b and the detecting pipe 11.
Collect the specified underground air via the and analyze and measure pollutant gas.
【００３７】さらに、図１６に示す地下空気採取管（ダ
ウンホールテスタ）回収工程（工程６）では、まず、表
層汚染調査用掘削ビット１の第２カップリング６をロッ
ド５から取外した後、地下空気採取管１０の検知管１１
をロッド５内から引上げて地上に回収する。Further, in the underground air sampling pipe (downhole tester) recovery step (step 6) shown in FIG. 16, first, the second coupling 6 of the surface contamination investigation drill bit 1 is removed from the rod 5, and then underground. Detector tube 11 of the air sampling tube 10
Is pulled up from inside the rod 5 and collected on the ground.
【００３８】そして、図１７に示すドリルロッド継ぎ足
し工程（工程７）では、ロッド５の後端のネジ部５ａに
新たに第二の掘削孔深さに対応した所定長さのドリルロ
ッド５ｘを継足し連結（螺着）し、ドリルロッド５ｘの
後端に前記取外した第２カップリング６を螺着するとと
もに、再び第２カップリング６の後端に固定部材７によ
り第１カップリング８を連結する。その後で、再び簡易
型掘削機３０を倒立させ、ドリルヘッド３４を前進させ
て表層汚染調査用掘削ビット１の第１カップリング８を
スピンドル３４ａに連結する。Then, in the drill rod joining step (step 7) shown in FIG. 17, a drill rod 5x having a predetermined length corresponding to the second drilling hole depth is newly joined to the threaded portion 5a at the rear end of the rod 5. The second coupling 6 is screwed to the rear end of the drill rod 5x, and the first coupling 8 is connected to the rear end of the second coupling 6 again by the fixing member 7. To do. After that, the simple excavator 30 is inverted again, and the drill head 34 is moved forward to connect the first coupling 8 of the drill bit 1 for surface contamination investigation to the spindle 34a.
【００３９】以下、図１１と同様に、ドリルヘッド３４
を給進させて第２の掘削孔深さにおける地下空気採取の
ための掘削を開始する。このようにして、前記の工程を
繰り返すことにより、任意の深度の地下空気を確実に効
率よく採取することができる。Thereafter, similarly to FIG. 11, the drill head 34
To start excavation for underground air extraction at the second borehole depth. In this way, by repeating the above steps, it is possible to reliably and efficiently collect underground air at an arbitrary depth.
【００４０】なお、他の実施の形態（図７乃至図１０）
においては、前記地下空気採取管挿入工程が工程３とな
り、その次の工程４に弁開放工程が入れ替えられる。す
なわち、先に所定の深度まで掘削した後、ドリルヘッド
３４を僅かに後退させて表層汚染調査用掘削ビット１を
引上げて、ビット先端部２ａの地下通気孔２ｅ近辺の土
圧を開放する（下げる）ことが望ましい。その後、地下
空気採取管１０の検知管１１を第２カップリング６の後
端の開口部６ａから胴体内部に挿入して（工程３）、図
７乃至図１０を参照して説明したように、前記地下空気
採取管１０の重量を負荷して弁体９ｂを下方に押し出
し、弁座２ｊ及び連通孔２ｋを開放して地下の空気を吸
入できる状態にする（工程４）。Another embodiment (FIGS. 7 to 10)
In step 3, the step of inserting the underground air sampling pipe becomes step 3, and the valve opening step is replaced with the step 4 that follows. That is, after excavating to a predetermined depth first, the drill head 34 is slightly retracted to pull up the surface layer contamination investigation drill bit 1 to release (reduce) the earth pressure near the underground ventilation hole 2e of the bit tip portion 2a. ) Is desirable. Then, the detection pipe 11 of the underground air collection pipe 10 is inserted into the body through the opening 6a at the rear end of the second coupling 6 (step 3), and as described with reference to FIGS. 7 to 10, The weight of the underground air sampling pipe 10 is loaded to push the valve body 9b downward, and the valve seat 2j and the communication hole 2k are opened so that the underground air can be taken in (step 4).
【００４１】なお、地下空気採取管１０を上方に引上げ
ると、再び付勢部材９ｇが伸張状態に復帰してスライド
部材９ｆ及び弁体９ｂが上方に引上げられ、これによっ
て、弁座２ｊ及び連通孔２ｋが密閉され、地下空気採取
管１０の先端部１１ａを含む前記胴体部内は地下通気孔
２ｅに対して気密に維持される。工程３及び４以外の工
程は、前記と同様である。When the underground air sampling pipe 10 is pulled up, the biasing member 9g returns to the extended state again and the slide member 9f and the valve body 9b are pulled up, whereby the valve seat 2j and the communication are established. The hole 2k is sealed, and the inside of the body including the tip portion 11a of the underground air sampling pipe 10 is kept airtight with respect to the underground ventilation hole 2e. The steps other than steps 3 and 4 are the same as described above.
【００４２】[0042]
【発明の効果】以上、詳細に説明した本発明によれば、
下記のような従来にない優れた効果を奏する。
（１）地下空気採取管の検知管先端部又は表層汚染調査
用掘削ビットの胴体部内と地下通気孔とを気密に維持し
て連通させ、かつ、ドリルロッド及び表層汚染調査用掘
削ビットの胴体部内に検知管を挿入して、地上から吸引
して地下空気を採取することができる。このため、表層
汚染調査用掘削ビットを抜管せずに、地下空気採取管を
挿入でき、崩壊性の高い地層でも、任意の深度で確実に
汚染調査を行うことができる。According to the present invention described in detail above,
The following excellent effects that have not been obtained conventionally are achieved. (1) The tip of the detection pipe of the underground air sampling pipe or the body part of the drill bit for surface pollution investigation is kept air-tight and communicates with the underground ventilation hole, and the inside of the body part of the drill rod and the drill bit for surface pollution research It is possible to insert a detector tube into and to suck underground air to collect underground air. Therefore, the underground air sampling pipe can be inserted without removing the excavation bit for surface contamination investigation, and the contamination investigation can be reliably performed at an arbitrary depth even in a highly collapsible stratum.
【００４３】（２）地下空気採取管の検知管先端部又は
表層汚染調査用掘削ビットの胴体部内と地下通気孔とを
気密に維持して連通させているため、確実に所定の深度
における地下空気を採取することができる。
（３）汚染の状況を確認しながら掘削作業を行うことが
できるため、掘削深度に過不足が生じることがなく、効
率がよく経済的である。(2) Since the tip of the detection pipe of the underground air sampling pipe or the body of the drill bit for surface contamination investigation and the underground ventilation hole are kept air-tight and communicate with each other, the underground air at a predetermined depth is surely maintained. Can be collected. (3) Since the excavation work can be performed while confirming the state of pollution, the excavation depth does not have excess or deficiency, which is efficient and economical.
【図１】本発明の一実施の形態による表層汚染調査用掘
削工具の掘削ビットの縦断面図である。FIG. 1 is a vertical cross-sectional view of a drill bit of a drill tool for surface contamination investigation according to an embodiment of the present invention.
【図２】図１のＡ−Ａ矢視図である。FIG. 2 is a view on arrow AA of FIG.
【図３】本発明の一実施の形態による表層汚染調査用掘
削ビットの固定部材の外観図である。FIG. 3 is an external view of a fixing member of a drill bit for surface contamination investigation according to an embodiment of the present invention.
【図４】本発明の一実施の形態による表層汚染調査用掘
削工具の縦断面図である。FIG. 4 is a vertical sectional view of a drilling tool for surface contamination investigation according to an embodiment of the present invention.
【図５】図４のＢ部の詳細図である。5 is a detailed view of a portion B of FIG.
【図６】本発明の一実施の形態による表層汚染調査用掘
削工具の地下空気採取管（ダウンホールテスタ）の外観
図である。FIG. 6 is an external view of an underground air sampling pipe (downhole tester) of a drilling tool for surface contamination investigation according to an embodiment of the present invention.
【図７】本発明に係る他の実施の形態による表層汚染調
査用掘削工具の掘削ビット先端部の縦断面図である。FIG. 7 is a vertical cross-sectional view of a tip portion of a drill bit of a drill tool for surface contamination investigation according to another embodiment of the present invention.
【図８】図７のＤ−Ｄ矢視図である。8 is a view taken along the line DD of FIG.
【図９】図７の側面図である。9 is a side view of FIG. 7. FIG.
【図１０】図７のＣ−Ｃ断面図である。10 is a cross-sectional view taken along line CC of FIG.
【図１１】本発明の表層汚染調査用掘削工具による表層
汚染調査の第１の掘削開始工程（工程１）を示す一部縦
断面図である。FIG. 11 is a partial vertical cross-sectional view showing a first excavation start step (step 1) of the surface layer contamination investigation using the surface layer contamination investigation drilling tool of the present invention.
【図１２】本発明の表層汚染調査用掘削工具による表層
汚染調査の掘削完了工程（工程２）を示す一部縦断面図
である。FIG. 12 is a partial vertical cross-sectional view showing the excavation completion step (step 2) of the surface layer contamination investigation using the surface layer contamination investigation drilling tool of the present invention.
【図１３】本発明の表層汚染調査用掘削工具による表層
汚染調査のシャッタ開放工程（工程３）を示す一部縦断
面図である。FIG. 13 is a partial vertical cross-sectional view showing a shutter opening step (step 3) of the surface contamination investigation using the surface contamination investigation drilling tool of the present invention.
【図１４】本発明の表層汚染調査用掘削工具による表層
汚染調査の地下空気採取管（ダウンホールテスタ）挿入
工程（工程４）を示す一部縦断面図である。FIG. 14 is a partial vertical cross-sectional view showing the underground air sampling pipe (downhole tester) insertion step (step 4) of the surface contamination investigation using the surface contamination investigation drilling tool of the present invention.
【図１５】本発明の表層汚染調査用掘削工具による表層
汚染調査の気体測定工程（工程５）を示す一部縦断面図
である。FIG. 15 is a partial vertical cross-sectional view showing a gas measuring step (step 5) in the surface layer contamination investigation using the surface layer contamination investigation drilling tool of the present invention.
【図１６】本発明の表層汚染調査用掘削工具による表層
汚染調査の地下空気採取管（ダウンホールテスタ）回収
工程（工程６）を示す一部縦断面図である。FIG. 16 is a partial vertical cross-sectional view showing the underground air sampling pipe (downhole tester) recovery step (step 6) of the surface contamination investigation using the surface contamination investigation drilling tool of the present invention.
【図１７】本発明の表層汚染調査用掘削工具による表層
汚染調査のロッド追加工程（工程７）を示す一部縦断面
図である。FIG. 17 is a partial vertical cross-sectional view showing a rod addition step (step 7) in the surface contamination investigation using the surface contamination investigation drilling tool of the present invention.
１ 表層汚染調査用掘削ビット ２ ビット ２ａ ビット先端部 ２ｂ 切刃 ２ｃ ビット後部 ２ｄ、４ａ、５ａ ネジ部 ２ｅ 地下通気孔 ２ｆ 縦溝 ２ｇ スリーブ ２ｈ、２ｉ、９ｄ シール部材 ２ｊ 弁座 ２ｋ、３ｂ 連通孔 ３ シート ３ａ 通気流路 ３ｃ、９ｃ テーパ面 ４ ビットアダプタ ５ ロッド ６ 第２カップリング ６ａ 開口部 ６ｂ、８ａ 連結孔 ７ 軸部材 ７ａ ゴムチューブ ７ｂ スナップピン ７ｃ 抜け止めピン ８ 第１カップリング ９ シャッタ又は弁（弁体） ９ａ 突起部 ９ｂ 軸 ９ｅ 弁軸 ９ｆ スライド部材 ９ｇ 固定部材 ９ｈ 付勢部材 １０ 地下空気採取管（ダウンホールテスタ） １１ 検知管 １２ ゴムチューブ １３ 導管 １４ 錘 １５ 延長採取管 １６ 気体採取セット ２０ ベース ２１ アンカー ３０ 簡易型掘削機（ポータブルドリル） ３１ 走行台車 ３２ ガイド機構 ３３ 駆動機構 ３４ ドリルヘッド ３４ａ スピンドル Ｇ 地盤 Ｇａ 掘削孔 1 Drill bit for surface pollution investigation 2 bits 2a Bit tip 2b cutting edge 2c bit rear 2d, 4a, 5a screw part 2e Underground vent 2f vertical groove 2g sleeve 2h, 2i, 9d Seal member 2j seat 2k, 3b communication hole 3 sheets 3a ventilation channel 3c, 9c Tapered surface 4-bit adapter 5 rod 6 Second coupling 6a opening 6b, 8a Connection hole 7 shaft members 7a rubber tube 7b snap pin 7c retaining pin 8 First coupling 9 Shutter or valve (valve body) 9a protrusion 9b axis 9e Valve shaft 9f slide member 9g fixing member 9h biasing member 10 Underground air sampling pipe (downhole tester) 11 Detector tube 12 rubber tubes 13 conduits 14 weights 15 Extended sampling tube 16 gas sampling set 20 base 21 anchor 30 Simple excavator (portable drill) 31 traveling trolley 32 Guide mechanism 33 Drive mechanism 34 drill head 34a spindle G ground Ga drilling hole
───────────────────────────────────────────────────── フロントページの続き (72)発明者 遠 藤 哲 哉 東京都中野区中央１丁目29番15号 鉱研工 業株式会社内 (72)発明者 小 川 正 行 東京都中野区中央１丁目29番15号 鉱研工 業株式会社内 (72)発明者 万 里 武 司 東京都中野区中央１丁目29番15号 鉱研工 業株式会社内 Ｆターム(参考） 2G052 AA19 AC03 AD13 AD42 BA02 BA11 DA21 GA11 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Tetsuya Endo Mining Researcher, 1-29-15 Chuo, Nakano-ku, Tokyo Business (72) Inventor Masayuki Ogawa Mining Researcher, 1-29-15 Chuo, Nakano-ku, Tokyo Business (72) Inventor Takeshi Banri Mining Researcher, 1-29-15 Chuo, Nakano-ku, Tokyo Business F term (reference) 2G052 AA19 AC03 AD13 AD42 BA02 BA11 DA21 GA11
Claims (5)
と、後端に設けられ、掘削機のドリルヘッドのスピンド
ルあるいはドリルロッドなどに係脱自在に接続されるカ
ップリングと、切刃及びカップリングの間に配置され、
下方部に外部と連通する地下通気孔及び地下通気孔内へ
の土砂の進入を防止するための開閉自在な弁を有する胴
体部とによって表層汚染調査用掘削ビットが構成されて
おり、 前記胴体部は、後端開口部から内部に挿入される地下空
気採取管の先端部が前記地下通気孔と気密に維持されて
連通できるように構成したことを特徴とする地盤の表層
汚染調査用掘削工具。1. A cutting blade made of a hard material provided at a front end, a coupling provided at a rear end and detachably connected to a spindle or a drill rod of a drill head of an excavator, a cutting blade, and Placed between the couplings,
An underground ventilation hole communicating with the outside in the lower part and a body portion having a valve that can be opened and closed to prevent the entry of sediment into the underground ventilation hole constitute a drill bit for surface pollution investigation. Is a drilling tool for investigation of surface soil contamination of the ground, characterized in that the tip of the underground air sampling pipe inserted into the interior from the rear end opening is kept airtight and communicates with the underground ventilation hole.
孔に形成された弁座と、 この弁座内に挿通されて、弁座と密着するように形成さ
れ、前記弁座と気密にかつ上下方向に摺動自在に嵌合さ
れた弁体と、 前記地下通気孔を密閉するように弁体を上方に付勢する
付勢部材とから構成され、 前記胴体部の後端内部から挿入された地下空気採取管に
より付勢部材が収縮して弁体が下方に押し出され、弁座
及び地下通気孔が開放される構造であることを特徴とす
る請求項１に記載の表層汚染調査用掘削工具。2. The valve of the underground ventilation hole is provided in an upper portion of the underground ventilation hole in the body portion, and has a valve seat formed in the underground ventilation hole, and is inserted into the valve seat to be in close contact with the valve seat. And a biasing member that biases the valve body upward so as to seal the underground ventilation hole. It is configured such that the biasing member is contracted by the underground air sampling pipe inserted from the inside of the rear end of the body portion to push the valve body downward, and the valve seat and the underground ventilation hole are opened. The drilling tool for surface contamination investigation according to claim 1.
閉自在にスライドするシャッタであって、 前記シャッタは、外接円径が掘削孔径に近似して形成さ
れ、前記表層汚染調査用掘削ビットの胴体部の下方に配
設されて、 掘削機により表層汚染調査用掘削ビットが下方に給進さ
れるとき、掘削孔の内壁との摩擦力により上方にスライ
ドして前記地下通気孔を閉塞し、表層汚染調査用掘削ビ
ットが上方に引上げられるとき、掘削孔の内壁との摩擦
力により下方にスライドして前記地下通気孔を開放する
ように構成されていることを特徴とする請求項１に記載
の表層汚染調査用掘削工具。3. The valve of the underground ventilation hole is a shutter that slides openably and closably in the underground ventilation hole, and the shutter is formed such that the circumscribed circle diameter is close to the diameter of the excavation hole, and the surface layer pollution research excavation is performed. When the excavator is installed below the body of the bit and the excavator drives the surface contamination investigation drill bit downward, it slides upward due to the frictional force with the inner wall of the drill hole to close the underground vent hole. Then, when the surface-layer contamination investigation drill bit is pulled upward, it is configured to slide downward by the frictional force with the inner wall of the drill hole to open the underground ventilation hole. Drilling tool for surface contamination investigation described in.
調査用掘削工具を使用して、掘削の原位置で任意の深度
の地下空気を採取することを特徴とする地質汚染調査方
法。4. A method for investigating geological pollution, comprising using the excavation tool for surface contamination investigation according to any one of claims 1 to 3 to collect underground air at an arbitrary depth at an original position of excavation.
に昇降自在に挿入され、先端部にガス検知管とその上方
に錘とを脱着可能に取付けた軟質材料の延長採取管とを
備えた地下空気採取管を用いて、掘削の原位置で任意の
深度の地下空気を採取することを特徴とする請求項４に
記載の地質汚染調査方法。5. An underground, which is vertically inserted into the inside of the drill rod and the body, and has a gas detection pipe at a tip end thereof and an extension sampling pipe of a soft material above which a weight is detachably attached. The method for investigating geological pollution according to claim 4, wherein underground air of an arbitrary depth is sampled at an original position of excavation by using an air sampling pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001268002A JP4892755B2 (en) | 2001-09-04 | 2001-09-04 | Excavation tool for surface contamination investigation and geological contamination investigation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001268002A JP4892755B2 (en) | 2001-09-04 | 2001-09-04 | Excavation tool for surface contamination investigation and geological contamination investigation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003082976A true JP2003082976A (en) | 2003-03-19 |
| JP4892755B2 JP4892755B2 (en) | 2012-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001268002A Expired - Lifetime JP4892755B2 (en) | 2001-09-04 | 2001-09-04 | Excavation tool for surface contamination investigation and geological contamination investigation method |
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| Country | Link |
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| JP (1) | JP4892755B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593933A (en) * | 2021-10-25 | 2022-06-07 | 江苏筑港建设集团有限公司 | Steel slag concrete sampling equipment and method for water transport engineering inspection |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62114991A (en) * | 1985-11-15 | 1987-05-26 | Tonen Sekiyukagaku Kk | Production of alkoxysilane |
| JPH0650858A (en) * | 1992-07-29 | 1994-02-25 | Kanagawa Pref Gov | Soil-gas gathering apparatus |
| JP2001207771A (en) * | 2000-01-28 | 2001-08-03 | Koken Boring Mach Co Ltd | Burying construction method for underground buried object and noncore boring device |
-
2001
- 2001-09-04 JP JP2001268002A patent/JP4892755B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62114991A (en) * | 1985-11-15 | 1987-05-26 | Tonen Sekiyukagaku Kk | Production of alkoxysilane |
| JPH0650858A (en) * | 1992-07-29 | 1994-02-25 | Kanagawa Pref Gov | Soil-gas gathering apparatus |
| JP2001207771A (en) * | 2000-01-28 | 2001-08-03 | Koken Boring Mach Co Ltd | Burying construction method for underground buried object and noncore boring device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593933A (en) * | 2021-10-25 | 2022-06-07 | 江苏筑港建设集团有限公司 | Steel slag concrete sampling equipment and method for water transport engineering inspection |
| CN114593933B (en) * | 2021-10-25 | 2023-09-08 | 江苏筑港建设集团有限公司 | Steel slag concrete sampling equipment and method for water transport engineering inspection |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4892755B2 (en) | 2012-03-07 |
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