JP3097833B2 - Simple well drilling method - Google Patents
Simple well drilling methodInfo
- Publication number
- JP3097833B2 JP3097833B2 JP08310126A JP31012696A JP3097833B2 JP 3097833 B2 JP3097833 B2 JP 3097833B2 JP 08310126 A JP08310126 A JP 08310126A JP 31012696 A JP31012696 A JP 31012696A JP 3097833 B2 JP3097833 B2 JP 3097833B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- excavation
- drilling
- groundwater
- ground
- 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.)
- Expired - Fee Related
Links
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- Earth Drilling (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【発明の属する技術分野】本発明は、浅層地下水を揚水
利用するための井戸の掘削造成に係る技術分野に属す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of drilling and constructing a well for pumping and utilizing shallow groundwater.
【０００２】[0002]
【従来の技術】従来の井戸掘工法としては、例えば、掘
削パイプを利用した打込式と称せられるものが知られて
いる。2. Description of the Related Art As a conventional well excavation method, for example, a so-called driving method using a drilling pipe is known.
【０００３】この従来の井戸掘工法は、先端に刃先を備
えた掘削パイプを地表に突立てて重錘等で打圧し、掘削
パイプを地盤に打込んで掘削パイプの先端を地下水位の
下方にまで到達させた後、掘削パイプを引抜いて掘削パ
イプによって掘削された打込坑に揚水パイプを挿入降下
させるものである。In this conventional well excavation method, a drilling pipe having a cutting edge at its tip is protruded from the surface of the ground and pressed with a weight or the like, and the drilling pipe is driven into the ground so that the tip of the drilling pipe is positioned below the groundwater level. Then, the drilling pipe is pulled out, and the pumping pipe is inserted and lowered into the driving pit drilled by the drilling pipe.
【０００４】この従来の井戸掘工法によると、作業員が
潜込んで掘削した立坑の側壁を枠材で造成する掘抜工法
に比して、掘削土砂が少なく比較的簡単な施工で井戸を
掘削造成することができる利点がある。According to the conventional well excavation method, a well is excavated by a relatively simple construction with less excavation soil compared with an excavation method in which a side wall of a shaft excavated by an operator is buried by a frame material. There are advantages that can be created.
【０００５】[0005]
【発明が解決しようとする課題】しかし前述の従来の井
戸掘工法では、重錘等の打圧の偏向や地盤の土圧の変化
で掘削パイプの打込方向が変化しやすいため、熟練した
作業員でないと正確な施工が困難であるという問題点が
ある。さらに、掘削パイプの打込方向に注意を払いなが
ら、重錘等の打圧で掘削パイプに掛かる地盤の土圧に抗
するため、熟練した作業員でも施工に時間が掛かるとい
う問題点がある。However, in the above-mentioned conventional well excavation method, since the driving direction of the excavation pipe tends to change due to the deflection of the pressure of the weight or the like and the change in the earth pressure of the ground, skilled work is required. There is a problem that accurate construction is difficult unless a person is a member. Furthermore, while paying attention to the direction in which the excavation pipe is driven, the pressure of the weight or the like resists the earth pressure on the excavation pipe, so that even a skilled worker takes time to perform the construction.
【０００６】本発明は、このような問題点を考慮してな
されたもので、非熟練の作業員が短時間で掘削すること
のできる井戸掘工法を提供することを課題とする。[0006] The present invention has been made in view of such problems, and it is an object of the present invention to provide a well excavation method in which an unskilled worker can excavate in a short time.
【０００７】[0007]
【課題を解決するための手段】前述の課題を解決するた
め、本発明に係る簡易井戸掘工法は、次のような手段を
採用する。Means for Solving the Problems In order to solve the above-mentioned problems, a simple well digging method according to the present invention employs the following means.
【０００８】即ち、請求項１では、人力掘削工具による
地上からの作業で地表から地下水位まで掘削パイプを挿
通可能な***形の立坑を掘削した後、掘削パイプを立坑
の底に打込みながら、掘削パイプに圧力水を供給して掘
削パイプの先端付近から圧力水を噴射する。That is, in the first aspect of the present invention, a small hole-shaped shaft through which a drilling pipe can be inserted from the surface of the ground to a groundwater level is drilled by a work from the ground with a human-powered drilling tool, and then the drilling pipe is driven into the bottom of the shaft. Pressurized water is supplied to the pipe to inject the pressurized water from near the tip of the drilling pipe.
【０００９】この手段では、地下水を含んだ崩壊しやす
い地盤が圧力水の噴射で簡単に掘削されるため、作業員
が掘削パイプを押下げるだけで地下水位より下方の掘削
が行われる。従って、掘削パイプの打込に熟練技術を要
しなくなり、掘削パイプの打込に掛かる時間も短縮され
ることになる。In this method, the easily collapsed ground containing groundwater is easily excavated by injection of the pressurized water, so that the excavation below the groundwater level is performed only by the worker pushing down the excavation pipe. Therefore, the skilled person is not required to drive the excavation pipe, and the time required for driving the excavation pipe is reduced.
【００１０】また、請求項２では、請求項１の工法にお
いて、打込まれた掘削パイプをそのまま埋設して揚水パ
イプとすることを特徴とする。According to a second aspect of the present invention, in the method of the first aspect, the driven excavation pipe is buried as it is to form a pumping pipe.
【００１１】この手段では、掘削パイプを引抜いて打込
坑に揚水パイプを挿入降下させる作業が省略される。In this means, the work of pulling out the excavation pipe and inserting and lowering the pumping pipe into the driving pit is omitted.
【００１２】また、請求項３では、請求項２の工法にお
いて、掘削パイプには、圧力水の噴射の逆方向への地下
水，土砂の通過を阻止するバルブ付きのノズルと、地下
水を土砂から濾過して掘削パイプの内部に通過させるス
トレーナとが設けられていることを特徴とする。According to a third aspect of the present invention, in the construction method of the second aspect, the drilling pipe has a nozzle with a valve for preventing passage of groundwater and earth and sand in a direction opposite to the injection of the pressurized water, and filters the groundwater from the earth and sand. And a strainer that passes through the inside of the drilling pipe.
【００１３】この手段では、圧力水がノズルとストレー
ナとの双方から噴射され、地下水がストレーナのみから
揚水される。In this means, pressure water is injected from both the nozzle and the strainer, and groundwater is pumped only from the strainer.
【００１４】[0014]
【発明の実施の形態】以下、本発明に係る簡易井戸掘工
法の実施の形態を図面に基いて説明する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a simple well digging method according to the present invention will be described below with reference to the drawings.
【００１５】この実施の形態では、図１に示すように、
地上から作業が行われる４工程の掘削が実施される。In this embodiment, as shown in FIG.
Four steps of excavation, which are performed from the ground, will be implemented.
【００１６】第１工程は、図１（Ａ）に示すように、地
表Ｅからスコップ，つるはし等からなる第１の人力掘削
工具１により立坑Ｔを掘削する。第１の人力掘削工具１
を用いた掘削作業については、特別な熟練技術を要しな
いし長時間掛かるものでもない。この第１の人力掘削工
具１による立坑Ｔの掘削深度ａは、約１．３ｍである。In the first step, as shown in FIG. 1A, a shaft T is excavated from the ground surface E by a first manual excavation tool 1 composed of a scoop, a pickaxe and the like. 1st human powered drilling tool 1
The excavation work using the slab does not require any special skill and does not take a long time. The excavation depth a of the shaft T by the first manual excavation tool 1 is about 1.3 m.
【００１７】第２工程は、図１（Ｂ）に示すように、い
わゆるいも掘りスコップ等からなる第２の人力掘削工具
２により立坑Ｔをさらに下方へ掘削する。第２の人力掘
削工具２であるいも掘りスコップは、把手２１の先端部
に刃先２２を開閉可能に連結してなるもので、開放した
刃先２２で土砂を掘削し閉鎖した刃先２２で掘削した土
砂を保持しして引上げることができるようになってい
る。第２の人力掘削工具２を用いた掘削作業について
は、特別な熟練技術を要しないし長時間掛かるものでも
ない。この第２の人力掘削工具２による立坑Ｔの掘削深
度ｂは、約１．２ｍである。In the second step, as shown in FIG. 1B, the shaft T is excavated further downward by a second human-powered excavating tool 2 composed of a so-called pottery scoop. A potato digging scoop, which is the second human-powered excavating tool 2, is formed by connecting a cutting edge 22 to the tip of a handle 21 so as to be openable and closable. Can be held and pulled up. The excavation work using the second manual excavation tool 2 does not require any special skill and does not take a long time. The excavation depth b of the shaft T by the second manual excavation tool 2 is about 1.2 m.
【００１８】第３工程は、図１（Ｃ）に示すように、い
わゆるアスファルトコアカッタ等からなる第３の人力掘
削工具３により立坑Ｔをさらに下方へ掘削する。第３の
人力掘削工具３であるアスファルトコアカッタは、先端
に刃先を有する筒体３１の内部にオーガ３２を備えてな
るもので、ハンドル３３で筒体３１，オーガ３２を回動
させて土砂を掘削し、ハンドル３３で筒体３１，オーガ
３２を引き上げることにより掘削した土砂を引上げるこ
とができるようになっている。第３の人力掘削工具３を
用いた掘削作業については、特別な熟練技術を要しない
し長時間掛かるものでもない。この第３の人力掘削工具
３による立坑Ｔの掘削深度ｃは、地下水位Ｗに到達する
までである。なお、アスファルトコアカッタからなる第
３の人力掘削工具３では、地上からの作業で地表Ｅから
約７．０ｍの掘削が可能である。また、地下水位Ｗに到
達したか否かは、地上から立坑Ｔを覗込むことによって
簡単に確認が可能である。In the third step, as shown in FIG. 1 (C), the shaft T is excavated further downward by a third manual excavation tool 3 comprising a so-called asphalt core cutter. The asphalt core cutter, which is the third human-powered excavating tool 3, is provided with an auger 32 inside a cylindrical body 31 having a cutting edge at its tip. The handle 33 rotates the cylindrical body 31 and the auger 32 to remove earth and sand. By excavating and raising the cylindrical body 31 and the auger 32 with the handle 33, the excavated earth and sand can be pulled up. The excavation work using the third human-powered excavation tool 3 does not require any special skill and does not take a long time. The excavation depth c of the shaft T by the third human-powered excavation tool 3 is until the groundwater level W is reached. In addition, with the third human-powered excavating tool 3 composed of an asphalt core cutter, excavation of about 7.0 m from the ground surface E is possible by work from the ground. Whether or not the groundwater level W has been reached can be easily confirmed by looking into the shaft T from the ground.
【００１９】第４工程は、図１（Ｄ）に示すように、掘
削パイプ４を立坑Ｔの底Ｔ’に打込んでさらに下方へ掘
削する。掘削パイプ４には、ホース５によりポンプ６を
介して貯水槽７が接続されて圧力水Ｊが供給されるよう
になっている。掘削パイプ４は、図２に詳細に示される
ように、供給された圧力水Ｊが流通するパイプ本体４１
と、パイプ本体４１の先端に設けられ圧力水Ｊが噴射さ
れるノズル４２とを備えてなるもので、地下水Ｗ’を含
んだ崩壊しやすい地盤が圧力水Ｊの噴射で簡単に掘削さ
れ、作業員が地上から掘削パイプ４のパイプ本体４１を
押下げるだけで地下水位Ｗより下方の掘削が行われる。
掘削パイプ４を用いた掘削作業については、従来の打込
式に要求されるような熟練技術を要しないし、従来の打
込式よりも打込時間が短縮される。また、掘削パイプ４
を用いた掘削作業では、圧力水Ｊの噴射で掘削された土
砂が一部立坑Ｔに噴上がるものの地表Ｅ付近まで到達す
ることがないため、立坑Ｔの地表Ｅ付近が地盤崩壊する
ことがなく、掘削パイプ４の押下げ降下がスムースに行
われるため、押下げられる掘削パイプ４に曲げ変形等が
生ずることもない。この掘削パイプ４による掘削深度ｄ
は、地下水位Ｗの下方に揚水のための充分な圧力層を確
保するまでである。In the fourth step, as shown in FIG. 1D, the excavation pipe 4 is driven into the bottom T 'of the shaft T to excavate further downward. A water storage tank 7 is connected to the drilling pipe 4 via a pump 6 by a hose 5 so that the pressurized water J is supplied. As shown in detail in FIG. 2, the drill pipe 4 is provided with a pipe body 41 through which the supplied pressure water J flows.
And a nozzle 42 provided at the tip of the pipe main body 41 and jetting the pressure water J. The easily collapsed ground including the groundwater W ′ is easily excavated by the injection of the pressure water J, Excavation below the groundwater level W is performed only by a member pushing down the pipe body 41 of the excavation pipe 4 from the ground.
The drilling operation using the drilling pipe 4 does not require the skill required for the conventional driving method, and the driving time is shorter than that of the conventional driving method. Drilling pipe 4
In the excavation work using, the earth and sand excavated by the injection of the pressure water J partly erupt into the shaft T but do not reach the vicinity of the ground surface E, so that the vicinity of the surface E of the shaft T does not collapse. Since the pushing down of the excavation pipe 4 is smoothly performed, bending deformation of the pushed down excavation pipe 4 does not occur. Excavation depth d by this excavation pipe 4
Is until a sufficient pressure layer for pumping water is secured below the groundwater level W.
【００２０】第４工程の後には、図３に示すように、立
坑Ｔに土砂を埋めて掘削パイプ４を埋設し、掘削パイプ
４のパイプ本体４１に揚水ポンプ８を接続して、曲げ変
形等が生じていない掘削パイプ４をそのまま揚水パイプ
として使用する。掘削パイプ４には、図４に詳細に示さ
れるように、揚水への土砂の混入を阻止する構造とし
て、ノズル４２の内部に地下水Ｗ’，土砂の逆流を阻止
するボール形のバルブ４３が設けられ、パイプ本体４１
のノズル４２の上部側に地下水Ｗを土砂から濾過してパ
イプ本体４１の内部に通過させるストレーナ４４が設け
られている。ストレーナ４４は、ノズル４２側に小孔４
４１が設けられた内パイプ４４２と、内パイプ４４２の
外側に嵌装されたメッシュ筒４４３とからなる。なお、
ストレーナ４４の小孔４４１からは、前述の掘削の際に
圧力水Ｊの一部が噴射される。掘削パイプ４を揚水パイ
プとして使用すると、従来の打込式のような掘削パイプ
４を引抜いて打込坑に揚水パイプを挿入降下させる作業
が省略されるため、施工をより短時間で行うことができ
る。After the fourth step, as shown in FIG. 3, the excavation pipe 4 is buried by burying the earth and sand in the shaft T, and the pumping pump 8 is connected to the pipe body 41 of the excavation pipe 4 to perform bending deformation and the like. The drilling pipe 4 in which no cracks are generated is used as it is as a pumping pipe. As shown in detail in FIG. 4, the excavation pipe 4 is provided with a ball-shaped valve 43 for preventing backflow of groundwater W ′ and sediment inside the nozzle 42 as a structure for preventing sediment from entering the pumped water. And the pipe body 41
A strainer 44 for filtering groundwater W from earth and sand and passing the same through the inside of the pipe body 41 is provided above the nozzle 42. The strainer 44 has a small hole 4 on the nozzle 42 side.
It comprises an inner pipe 442 provided with 41 and a mesh cylinder 443 fitted on the outside of the inner pipe 442. In addition,
From the small hole 441 of the strainer 44, a part of the pressure water J is jetted during the excavation described above. When the drilling pipe 4 is used as a pumping pipe, the work of pulling out the drilling pipe 4 and inserting and lowering the pumping pipe into the driving pit as in the conventional driving type is omitted, so that the construction can be performed in a shorter time. it can.
【００２１】[0021]
【発明の効果】以上のように、本発明に係る簡易井戸掘
工法は、各請求項共通として、掘削パイプを打圧せずに
圧力水の噴射による掘削を利用して押下げることから、
従来の打込式のように打込方向に注意を払ったり打圧で
土圧に抗する必要がないため、非熟練の作業員が短時間
で掘削することができる効果がある。As described above, the simple well digging method according to the present invention is common to each claim, in that the digging pipe is pushed down by using the digging by injection of the pressurized water without pressing the digging pipe.
Unlike the conventional driving method, there is no need to pay attention to the driving direction or to resist the earth pressure by the pressing pressure, so that an unskilled worker can excavate in a short time.
【００２２】さらに、各請求項共通として、掘削パイプ
に打圧の応力が作用せず、掘削パイプが圧力水の噴射に
よる掘削で土圧を低減した後に追従して押下げられるた
め、掘削パイプに曲げ変形等が生じない効果がある。Further, since the stress of the pressing pressure does not act on the excavation pipe and the excavation pipe is pushed down following the reduction of the earth pressure by the excavation by injection of the pressurized water, it is common to each claim. There is an effect that bending deformation or the like does not occur.
【００２３】さらに、各請求項共通として、掘削パイプ
の打込みを地表から離れた立坑の底から行うため、圧力
水の噴射で地表付近の地盤が崩壊するのを防止すること
ができる効果がある。Furthermore, since the driving of the excavation pipe is performed from the bottom of the shaft away from the ground surface, it is possible to prevent the ground near the ground surface from collapsing due to the injection of the pressurized water.
【００２４】さらに、請求項２のみとして、従来の打込
式のような掘削パイプを引抜いて打込坑に揚水パイプを
挿入降下させる作業が省略されるため、施工をより短時
間で行うことができる効果がある。Furthermore, the construction of the present invention can be performed in a shorter time because the operation of pulling out the excavating pipe and inserting and lowering the pumping pipe into the driving pit as in the conventional driving type is omitted. There is an effect that can be done.
【００２５】さらに、請求項３のみとして、掘削パイプ
に設けられたバルブ，ストレーナにより揚水への土砂の
混入を確実に阻止することができるため、掘削パイプを
そのまま揚水パイプと使用しても有効な揚水が可能にな
る効果がある。Further, since only the third aspect of the present invention can reliably prevent the earth and sand from being mixed into the pumped water by the valve and the strainer provided in the drilled pipe, it is effective to use the drilled pipe as it is as the pumped pipe. There is an effect that water can be pumped.
【図１】本発明に係る簡易井戸掘工法の実施の形態を示
す工程図で、（Ａ）〜（Ｄ）に工程順を示してある。FIG. 1 is a process chart showing an embodiment of a simple well excavation method according to the present invention, and (A) to (D) show a process order.
【図２】図１（Ｄ）の要部の拡大断面図である。FIG. 2 is an enlarged sectional view of a main part of FIG. 1 (D).
【図３】図１（Ｄ）に続く工程図である。FIG. 3 is a process drawing following FIG. 1 (D).
【図４】図３の要部の拡大断面図である。FIG. 4 is an enlarged sectional view of a main part of FIG.
１，２，３ 人力掘削工具 ４ 掘削パイプ ４２ ノズル ４３ バルブ ４４ ストレーナ Ｅ 地表 Ｊ 圧力水 Ｔ 立坑 Ｔ’ 底 Ｗ 地下水位 Ｗ’ 地下水 1,2,3 Manual drilling tool 4 Drilling pipe 42 Nozzle 43 Valve 44 Strainer E Ground surface J Pressure water T Shaft T 'Bottom W Groundwater level W' Groundwater
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) E03B 3/08 E21B 1/00 - 49/10 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 7 , DB name) E03B 3/08 E21B 1/00-49/10
Claims (3)
表から地下水位まで掘削パイプを挿通可能な***形の立
坑を掘削し、掘削パイプを立坑の底に打込みながら、掘
削パイプに圧力水を供給して掘削パイプの先端付近から
圧力水を噴射する簡易井戸掘工法。1. An excavation of a small hole-shaped shaft through which a drilling pipe can be inserted from the surface of the ground to a groundwater level by an operation from the ground with a human-powered drilling tool, and supply of pressurized water to the drilling pipe while driving the drilling pipe into the bottom of the shaft. A simple well drilling method in which pressure water is injected from near the tip of a drill pipe.
込まれた掘削パイプをそのまま埋設して揚水パイプとす
ることを特徴とする簡易井戸掘工法。2. A simple well excavation method according to claim 1, wherein said drilled pipe is buried as it is to form a pumping pipe.
削パイプには、圧力水の噴射の逆方向への地下水，土砂
の通過を阻止するバルブ付きのノズルと、地下水を土砂
から濾過して掘削パイプの内部に通過させるストレーナ
とが設けられていることを特徴とする簡易井戸掘工法。3. The simple well digging method according to claim 2, wherein the drilling pipe has a nozzle with a valve for preventing the passage of groundwater and earth and sand in a direction opposite to the injection of the pressurized water, and the groundwater is filtered from the earth and sand. A simple well digging method, characterized in that a strainer that passes through the inside of a digging pipe is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08310126A JP3097833B2 (en) | 1996-11-06 | 1996-11-06 | Simple well drilling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08310126A JP3097833B2 (en) | 1996-11-06 | 1996-11-06 | Simple well drilling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10140620A JPH10140620A (en) | 1998-05-26 |
| JP3097833B2 true JP3097833B2 (en) | 2000-10-10 |
Family
ID=18001494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08310126A Expired - Fee Related JP3097833B2 (en) | 1996-11-06 | 1996-11-06 | Simple well drilling method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3097833B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100371520B1 (en) * | 2000-04-21 | 2003-02-06 | 안근묵 | prevent pollution installa-tion And Produce Method of nunderground water a tube well |
-
1996
- 1996-11-06 JP JP08310126A patent/JP3097833B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10140620A (en) | 1998-05-26 |
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| LAPS | Cancellation because of no payment of annual fees |