JPH07217362A - Method and equipment for investigating water sampling of multi-stratum underground aquifer - Google Patents
Method and equipment for investigating water sampling of multi-stratum underground aquiferInfo
- Publication number
- JPH07217362A JPH07217362A JP2915994A JP2915994A JPH07217362A JP H07217362 A JPH07217362 A JP H07217362A JP 2915994 A JP2915994 A JP 2915994A JP 2915994 A JP2915994 A JP 2915994A JP H07217362 A JPH07217362 A JP H07217362A
- Authority
- JP
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- Prior art keywords
- water
- aquifer
- pipe
- strainer
- groundwater
- 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.)
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- Sampling And Sample Adjustment (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複数の止水パツカー付
きストレーナー部を有する集水管と異なる止水リング付
き透水部を有する止水底付き採水管の併用により、単井
において複数の帯水層中の地下水を個別に採水して調査
する多層地下帯水層の採水調査法及び採水調査装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a plurality of aquifers in a single well by using a water collecting pipe having a plurality of strainer sections with a water stopping packer and a water collecting pipe with a water stopping bottom having a different water permeable section with a water stopping ring. The present invention relates to a sampling test method and a sampling test device for a multi-layered underground aquifer, which collects and collects individual groundwater.
【０００２】[0002]
【従来の技術】近年、地下水の汚染対策、取水（飲用
水、工業用水等）の水質改善や水量確保等のため、既設
井戸の附近や団地等でボーリング孔を掘削して、帯水層
ごとに地下水を所定の期間にわたり繰り返し採水し、帯
水層ごとに汚染状況や水質、水量等を調査する採水・調
査が行われており、従来の地下水の採水調査は、図３に
示（Ａ）〜（Ｄ）に示すようにボーリング孔を掘削し地
中の比抵抗を測定して帶水層ａ１〜ａ３（ｂは不透水性
地盤）を検出した後、その附近に適宜の間隔を置き各帶
水層に連通した複数の調査孔ｃ１〜ｃ３を掘削して、各
調査孔ｃ１〜ｃ３に集水管ｄ１〜ｄ３を配置し、各集水
管の下部のストレーナ部ｄ０を帶水層ａ１〜ａ３ごとに
配置し、各ストレーナ部ｄ０上に配設したパツカーｅ
（エア圧、水圧又は油圧式等）で止水して、各帶水層の
地下水を個別に所定の期間にわたり繰り返し採水した
り、又は、図４（Ａ）〜（Ｄ）に示すように調査孔ｆ１
を帯水層ａ１近くまでケーシング掘りして、ケーシング
ｇ１の下側を清水掘ｈして帯水層ａ１に連通せしめ、帯
水層ａ１の地下水を集水して所定の期間にわたり繰り返
し採水した後、調査孔ｆ１を延長して調査孔ｆ２とし、
ケーシングｇ２の下側を清水掘ｈして帯水層ａ２に連通
せしめ、帯水層ａ２の地下水を同様に採水し、さらに同
様に調査孔ｆ３、ケーシングｇ３及び清水掘ｈして帯水
層ａ３の地下水を採水して、各採水の状況及びその検査
により各帯水層ごとに地下水の汚染や水質、水量等を調
査する水理調査法になつている。2. Description of the Related Art In recent years, in order to prevent pollution of groundwater, improve water quality of drinking water (drinking water, industrial water, etc.) and secure water volume, drilling boreholes near existing wells and in housing complexes, etc. The groundwater is repeatedly sampled over a predetermined period of time, and the water quality and quantity of water in each aquifer are investigated. The conventional groundwater sampling survey is shown in Figure 3. As shown in (A) to (D), after drilling the boring hole and measuring the resistivity in the ground to detect the water layers a1 to a3 (b is the impermeable ground), appropriate intervals are provided in the vicinity thereof. A plurality of survey holes c1 to c3 communicating with each water layer are drilled, water collecting pipes d1 to d3 are arranged in each of the water survey holes c1 to c3, and a strainer section d0 below each water collecting pipe is formed in the water layer. Packers e arranged for each of a1 to a3 and arranged on each strainer part d0.
Water is stopped by (air pressure, water pressure, hydraulic type, etc.), and groundwater in each water layer is individually and repeatedly sampled over a predetermined period, or as shown in FIGS. 4 (A) to 4 (D). Survey hole f1
Casing was dug up to near aquifer a1, and the lower side of casing g1 was pierced with fresh water to communicate with aquifer a1. Groundwater in aquifer a1 was collected and repeatedly sampled over a predetermined period. After that, the inspection hole f1 is extended to an inspection hole f2,
The bottom side of the casing g2 is pierced with fresh water to communicate with the aquifer a2, groundwater of the aquifer a2 is sampled in the same manner, and the inspection hole f3, the casing g3, and the freshwater dig h are also used to aquifer. It is a hydraulic survey method that collects groundwater in a3 and examines the status of each sampled water and its inspection for groundwater contamination, water quality, and water quantity for each aquifer.
【０００３】[0003]
【発明が解決しようとする課題】従来の地下水の採水調
査において、図３に示す採水調査法は、そのパツカー付
き集水管の組み換えがボーリング孔の崩れやパツカーの
損傷等により実際上不可能となり、前記のように多層の
帯水層ごとに削孔し、その孔ごとにパツカー付き集水管
を配置する工程となつて、多くの手数、手間を要し工期
が長くなりコスト高になるとともに、地層の変化により
集水管のストレーナ部の配置精度が低下して採水の信頼
性などに課題がある。また、図４に示す採水調査法は、
帯水層ごとに調査孔の掘削、清水掘及びその延長掘削、
清水掘を繰り返す必要があり、多くの手数、手間を要し
工期が長くなつてコスト高になるとともに、この清水掘
は裸孔であり崩壊し易く採水調査の信頼性が低下するな
どの課題がある。In the conventional groundwater sampling survey, in the sampling survey method shown in FIG. 3, it is practically impossible to relocate the water collecting pipe with the packer due to collapse of the boring hole or damage to the packer. As described above, the process of drilling holes in each of the multiple aquifers and arranging the water collecting pipe with a packer for each hole requires a lot of labor and time, and the construction period becomes long and the cost becomes high. However, due to changes in the stratum, the strainer placement accuracy of the water collection pipe decreases, which poses a problem in water sampling reliability. In addition, the water sampling survey method shown in FIG.
Excavation of survey holes for each aquifer, clear water excavation and its extension,
It is necessary to repeat fresh water digging, which requires a lot of labor and time, and the construction period is long, resulting in high cost, and this fresh water digging is a bare hole and easily collapses, which reduces the reliability of water sampling surveys. There is.
【０００４】本発明は、上記のような実状に鑑み開発さ
れたものであつて、その目的とする処は、１本の検査孔
（単井）にセツトした複数のストレーナー部を有する集
水管に、異なる透水部を有する複数の採水管を組み換え
セツトして、多層地下帯水層の地下水を個別に容易に能
率良く高精度で採水、調査し、施工性とともに採水調査
性能、信頼性を向上しコスト節減を可能にした多層地下
帯水層の採水調査法及びその採水調査装置を提供するに
ある。The present invention was developed in view of the above situation, and its object is to provide a water collecting pipe having a plurality of strainer sections set in one inspection hole (single well). , By recombining multiple water sampling pipes with different water permeation parts, it is possible to easily and efficiently sample and investigate groundwater in multi-layered aquifers individually, efficiently and accurately. (EN) It is intended to provide a water sampling investigation method and a water sampling investigation apparatus for a multi-layered underground aquifer, which is improved and enables cost reduction.
【０００５】[0005]
【課題を解決するための手段】本発明は、調査孔を掘削
して地中の複数の帯水層を検出し、この調査孔内に複数
の止水パツカー付きストレーナー部を有する集水管を配
置して、各ストレーナー部を前記の帯水層に個別に連通
せしめ、この集水管内に異なる止水リング付き透水部を
有する止水底付き採水管を組み換え配置して、特定の帯
水層及び他の帯水層の各地下水を個別に採水して調査す
ることにより、多層地下帯水層の地下水を個別に容易に
能率良く高精度で採水、調査可能にして、施工性ととも
に採水調査性能、信頼性を高めコスト節減している。According to the present invention, a survey hole is excavated to detect a plurality of aquifers in the ground, and a water collecting pipe having a plurality of strainer sections with water blocking packers is arranged in the survey hole. Then, each strainer section is individually communicated with the aquifer, and a water sampling pipe with a water blocking bottom having a different water permeable part with a water blocking ring is rearranged in this water collecting pipe to arrange a specific aquifer and other By collecting and investigating each groundwater of each aquifer individually, it becomes possible to collect and investigate the groundwater of the multi-layered aquifer individually, easily and efficiently and with high accuracy. Performance and reliability are improved and cost is reduced.
【０００６】[0006]
【作用】調査孔を掘削して地中の複数の帯水層を検出
し、この調査孔内に複数の止水パツカー付きストレーナ
ー部を有する集水管を配置して、各ストレーナー部を前
記の帯水層に個別に連通せしめ、この集水管内に異なる
止水リング付き透水部を有する止水底付き採水管を組み
換え配置して、特定の帯水層及び他の帯水層の各地下水
を個別に採水、調査し、１本の調査孔による帯水層の検
出、集水管の配置セツト及びその集水管内への異なる採
水管の組み換え配置セツトによつて、採水工程を簡素化
して集水管の配置精度を高め、採水管の組み換え配置セ
ツトを容易とし配置精度を高めて、多層地下帯水層の地
下水を個別に容易に採水可能とし、採水の能率及び精
度、信頼性を高めるとともに、前記のような１本の調査
孔、集水管及び採水管により工費、採水コストを効果的
に節減している。[Function] The survey hole is excavated to detect a plurality of aquifers in the ground, and a water collecting pipe having a plurality of strainer sections with water shut-off packers is arranged in the survey hole, and each strainer section is connected to the above-mentioned zone. Individually connect each groundwater of a specific aquifer and other aquifer by connecting to the water layer individually and relocating the water collecting pipe with a water blocking bottom with different water permeable part with a water blocking ring in this water collecting pipe. Water sampling and simplification of the water sampling process by detecting the aquifer with one hole, arranging the collection pipe and relocating different collection pipes into the collection pipe. The placement accuracy of the water sampling pipes is improved, the placement accuracy of the sampling pipes is improved, and the placement accuracy is improved so that the groundwater in the multi-layered aquifer can be easily sampled individually, and the efficiency, accuracy, and reliability of water sampling are improved. , One survey hole, water collection pipe and water collection pipe as described above More construction cost, which effectively reduced the water sampling cost.
【０００７】[0007]
【実施例】図１に本発明の多層地下帯水層の採水調査法
とその採水調査装置の一実施例、図２にその採水管の他
の実施例を示す。図中ａ１，ａ２，ａ３は検出した地中
の帯水層、ｂは検出した地中の不透水性地盤、１は掘削
ビツト１ａ付きボーリングロツド、２は採水調査用の調
査孔、３は複数の止水パツカー４付きストレーナー部５
ａ〜５ｃを有する集水管、６は清掃管、７は清掃用のエ
ア管、８，１８は止水リング９付き透水部１０ａ〜１０
ｃを有する止水底１１付き採水管、１２は採水用の揚水
手段（水中ポンプ）、Ｋは地中の比抵抗の特性曲線であ
り、図１に示す実施例は、調査孔２を掘削して地中の複
数の帯水層ａ１〜ａ３を検出し、複数の止水パツカー４
付きストレーナー部５ａ〜５ｃを有する集水管３を調査
孔２内に配置して、各ストレーナー部５ａ〜５ｃを前記
の帯水層ａ１〜ａ３に個別に連通せしめ、止水リング９
付き透水部１０ａを有する止水底１１付き採水管８を集
水管３内に配置して、透水部１０ａを特定の帯水層ａ１
のみに当該ストレーナー部５ａを介して連通し特定層ａ
１の地下水を流入して採水した後、異なる止水リング９
付き透水部１０ｂ，１０ｃを有する止水底１１付き採水
管１８を他の帯水層ａ２，ａ３に他の当該ストレーナー
部５ｂ，５ｃを介して連通し他層ａ２，ａ３の地下水を
流入して採水し、各採水によつて各層の地下水を調査す
る多層地下帯水層の採水・調査法になつている。EXAMPLE FIG. 1 shows an embodiment of the water sampling survey method for a multi-layered underground aquifer of the present invention, and an embodiment of the water sampling survey apparatus, and FIG. 2 shows another embodiment of the water sampling pipe. In the figure, a1, a2 and a3 are the detected aquifers in the ground, b is the impermeable ground in the detected ground, 1 is a boring rod with an excavation bit 1a, 2 is a survey hole for water sampling survey, 3 Is a strainer part 5 with multiple water-stoppers 4
Water collecting pipe having a to 5c, 6 is a cleaning pipe, 7 is an air pipe for cleaning, and 8 and 18 are water-permeable parts 10a to 10 with a water stop ring 9.
c is a water sampling pipe with a still water bottom 11, 12 is a pumping means (submersible pump) for water sampling, K is a characteristic curve of underground resistivity, and the embodiment shown in FIG. To detect a plurality of aquifers a1 to a3 in the ground, and
The water collecting pipe 3 having the attached strainer portions 5a to 5c is arranged in the survey hole 2 so that the strainer portions 5a to 5c are individually communicated with the aquifers a1 to a3, and the water stop ring 9 is provided.
The water sampling pipe 8 with the water stop bottom 11 having the attached water permeable portion 10a is arranged in the water collection pipe 3, and the water permeable portion 10a is placed in the specific aquifer a1.
Only the specific layer a communicating with the strainer section 5a.
A different water stop ring 9 after inflowing and collecting 1 groundwater
The water sampling pipe 18 with the water stop bottom 11 having the attached water-permeable parts 10b and 10c is connected to the other aquifers a2 and a3 through the other strainer parts 5b and 5c, and the groundwater of the other layers a2 and a3 is introduced to collect the water. It is a method of sampling and investigating multi-layered aquifers, in which each layer of groundwater is sampled.
【０００８】また、地中の複数の帯水層ａ１〜ａ３に対
応した複数の止水パツカー４付きストレーナー部５ａ〜
５ｃを有し調査孔２内に配置して帯水層ａ１〜ａ３に個
別に連通する集水管３と、止水リング９付き透水部１０
ａを有し特定の帯水層ａ１のみに当該ストレーナー部５
ａを介して連通し特定層ａ１の地下水を流入して採水す
る止水底１１付きの採水管８と、異なる止水リング９付
き透水部１０ｂ，１０ｃを有し他の帯水層ａ２，ａ３に
当該ストレーナー部５ｂ，５ｃを介して連通し他層ａ
２，ａ３の地下水を流入して採水する止水底１１付きの
採水管１８と、採水管８，１８内の地下水の揚水手段１
２とを具備した多層地下帯水層の採水調査装置になつて
いる。Further, strainer parts 5a to 5a having a plurality of water blocking packers 4 corresponding to a plurality of aquifers a1 to a3 in the ground.
Water collection pipe 3 having 5c, which is arranged in survey hole 2 and communicates with aquifers a1 to a3 individually, and water permeable portion 10 with water stop ring 9.
the strainer section 5 having a specific aquifer a1 only.
Other aquifers a2 and a3 having water collection pipes 8 with a water stop bottom 11 for collecting and collecting ground water of a specific layer a1 communicating with each other through a and water passage parts 10b and 10c with different water stop rings 9 To the other layer a through the strainer portions 5b and 5c.
Water sampling pipe 18 with water stop bottom 11 for inflowing and sampling ground water 2 and a3, and pumping means 1 for ground water in water sampling pipes 8 and 18
It has become a multi-layered underground aquifer water sampling and survey device.
【０００９】図１によりさらに詳述すると、図１（Ａ）
の削孔工程において、例えば、掘削ビツト１ａ付きボー
リングロツド１等により調査孔２を地中深く掘削して、
この調査孔２の掘削土砂等により、又は、調査孔２を利
用して地中の比抵抗（地盤自体の電気伝導度の逆数）を
適宜の手段で測定し、図１（Ｂ）に示すような比抵抗の
特性曲線Ｋを得てこれを解析して、地中の不透水性地盤
ｂ、複数の帯水層ａ１〜ａ３の深さや厚さなどが容易に
精度良く検出される。必要に応じショート電極とロング
電極で比抵抗を計測して検出精度をさらに高めることが
できる。Referring to FIG. 1 in more detail, FIG.
In the drilling step of, for example, the drilling rod 1 with the drill bit 1a is used to drill the survey hole 2 deep in the ground,
The specific resistance in the ground (the reciprocal of the electric conductivity of the ground itself) is measured by an appropriate means by excavating the survey hole 2 or using the survey hole 2, and as shown in FIG. 1 (B). A characteristic curve K of a specific resistance is obtained and analyzed to easily and accurately detect the impermeable ground b in the ground and the depths and thicknesses of the aquifers a1 to a3. If necessary, the specific resistance can be measured with the short electrode and the long electrode to further improve the detection accuracy.
【００１０】次に、図１（Ｃ）に示す集水管３の配置工
程において、集水管３（例えば７５mmφ程度）に複数の
ストレーナー部５ａ〜５ｃを形成するとともに、各スト
レーナー部５ａ〜５ｃの上、下部の外側に止水パツカー
４を付設する。各ストレーナー部５ａ〜５ｃは、各帯水
層ａ１〜ａ３の深さ及び厚さに対応させて多数の孔を穿
つて形成し、また、各止水パツカー４は、集水管３の外
周に配設され適宜の配管（図示省略）を介しエアー圧、
水圧又は油圧で膨脹して調査孔２との間を止水する構造
になつている。前記のように地盤の状態に対応させて形
成した複数の止水パツカー４付きストレーナー部５ａ〜
５ｃを有する集水管３を調査孔２内に配置し、各ストレ
ーナー部５ａ〜５ｃを帯水層ａ１〜ａ３に対応させた配
置とし、各止水パツカー４を膨脹させて調査孔２との間
を止水して、ストレーナー部５ａ〜５ｃを帯水層ａ１〜
ａ３に個別に連通せしめ、各帯水層ａ１〜ａ３の地下水
が各ストレーナー部５ａ〜５ｃから個別に流入する配置
にする。Next, in the step of arranging the water collecting pipe 3 shown in FIG. 1 (C), a plurality of strainer parts 5a to 5c are formed on the water collecting pipe 3 (for example, about 75 mmφ), and on each strainer part 5a to 5c. , A water-stop packer 4 is attached to the outside of the lower part. Each strainer part 5a to 5c is formed by punching a large number of holes corresponding to the depth and thickness of each aquifer a1 to a3, and each water blocking packer 4 is arranged on the outer circumference of the water collection pipe 3. Air pressure is provided via an appropriate pipe (not shown)
The structure is such that it expands by water pressure or hydraulic pressure to stop the water from the investigation hole 2. As described above, the strainer parts 5a with the plurality of water blocking packers 4 formed corresponding to the state of the ground
The water collecting pipe 3 having 5c is arranged in the survey hole 2 and the strainer portions 5a to 5c are arranged to correspond to the aquifers a1 to a3. To stop the strainer parts 5a-5c from aquifer a1
The groundwater of each of the aquifers a1 to a3 is individually communicated with the a3 so that the groundwater of each of the aquifers a1 to a3 individually flows from the strainer portions 5a to 5c.
【００１１】なお、必要に応じ図１（Ｄ）に示す清掃工
程のように、集水管３内に清掃管６を配置し、この清掃
管６内にエアー管７を配置して下部内に矢示のように圧
気を送り込みエアリフトにして、適宜の揚水手段（図示
省略）により清掃管６内の地下水を強制的に揚水して、
各層の地下水を矢示のように流入せしめ内部のスライム
等を排出して清掃し、各帯水層ａ１〜ａ３の地下水がス
トレーナー部５ａ〜５ｃから集水管３内に流入するのを
円滑にした後、清掃管６及びエアー管７を抜き取り撤去
する。If necessary, as in the cleaning step shown in FIG. 1D, a cleaning pipe 6 is arranged in the water collecting pipe 3, an air pipe 7 is arranged in the cleaning pipe 6, and an arrow is drawn in the lower portion. As shown in the figure, the compressed air is sent to form an air lift, and the ground water in the cleaning pipe 6 is forcibly pumped by an appropriate pumping means (not shown).
The groundwater of each layer was made to flow in as indicated by an arrow, and the slime and the like inside were discharged to be cleaned, and the groundwater of each aquifer a1 to a3 was smoothly made to flow from the strainer parts 5a to 5c into the water collection pipe 3. After that, the cleaning pipe 6 and the air pipe 7 are pulled out and removed.
【００１２】さらに、図１（Ｅ）に示す特定層の採水管
の配置工程において、この図示例では上層の帯水層ａ１
を特定層として採水するものであり、この採水管８は、
集水管３よりも程良く小径（例えば５０mmφ程度）と
し、下部に多数の孔を帯水層ａ１の厚さ程度の範囲に配
設して集水部１０ａを形成し、この集水部１０ａの上、
下部に止水リング９（図２Ｃ，Ｄ，Ｆ参照）を固設する
とともに、下端部に止水底１１（図２Ｄ，Ｅ参照）を設
けた構造とし、この採水管８を図示のように集水管３内
に配置して、この集水部１０ａを帯水層ａ１に対応した
配置とし、集水部１０ａの上、下部は止水リング９で集
水管３との間を止水し、その下端は止水底１１で止水し
て、帯水層ａ１の地下水のみ集水管３のストレーナー部
５ａを介し採水管８内に取り入れる。Further, in the step of arranging the water sampling pipe of the specific layer shown in FIG. 1 (E), in the illustrated example, the upper aquifer a1
Is taken as a specific layer, and the water sampling pipe 8 is
The diameter of the water collecting pipe 3 is reasonably small (for example, about 50 mmφ), and a large number of holes are arranged in the lower portion within the range of the thickness of the aquifer a1 to form the water collecting portion 10a. Up,
A water stop ring 9 (see FIGS. 2C, D and F) is fixedly installed at the lower portion, and a water stop bottom 11 (see FIGS. 2D and E) is provided at the lower end. The water collecting pipe 8 is collected as shown in the figure. The water collecting part 10a is arranged in the water pipe 3 so as to correspond to the aquifer a1, and the upper and lower parts of the water collecting part 10a are stopped with the water collecting pipe 3 by the water stop ring 9. The lower end is stopped by the water stop bottom 11, and only the groundwater of the aquifer a1 is taken into the water sampling pipe 8 through the strainer portion 5a of the water collection pipe 3.
【００１３】また、図１（Ｆ）に示す特定層の採水工程
において、採水管８内に水中ポンプ（揚水手段）１２を
配置して揚水管１３を介し採水する。この運転制御つま
り採水速度や採水管８内の水位の変化等により、帯水層
ａ１内の地下水量が推定される。この採水は所定の期間
にわたり繰り返されて、この採水の汚染状態や硬水や軟
水等の水質検査が随時に行われる。Further, in the water collecting step of the specific layer shown in FIG. 1 (F), a submersible pump (pumping means) 12 is arranged in the water sampling pipe 8 and water is sampled through the water pumping pipe 13. The amount of groundwater in the aquifer a1 is estimated by this operation control, that is, the change in the water sampling rate, the water level in the water sampling pipe 8, and the like. This water sampling is repeated for a predetermined period of time, and the polluted state of the water sampling and water quality inspection of hard water, soft water, etc. are performed at any time.
【００１４】図１（Ｇ）に示す他層の採水工程におい
て、図示例では他の帯水層ａ２と帯水層ａ３を同時に採
水する場合であり、この場合は、図示のように帯水層ａ
２と帯水層ａ３に対応した集水部１０ｂと集水部１０ｃ
を有する採水管１８として、この採水管１８を集水管３
内に配置して、帯水層ａ２と帯水層ａ３内の地下水を集
水管３のストレーナー部５ｂ，５ｃを介し採水管１８の
集水部１０ｂと集水部１０ｃから同時に採水管８内に取
り入れて、図１（Ｆ）に示すような揚水手段１２を配置
して地下水量を推定しながら採水する。この採水も所定
の期間にわたり繰り返されて、この採水の汚染状態や硬
水や軟水等の水質検査が随時に行われる。In the water sampling process for the other layer shown in FIG. 1G, in the illustrated example, another aquifer a2 and aquifer a3 are sampled at the same time. In this case, as shown in FIG. Water layer a
2 and the water collecting portion 10b and the water collecting portion 10c corresponding to the aquifer a3
As the water sampling pipe 18 having the
The groundwater in the aquifer a2 and the aquifer a3 into the water collecting pipe 8 simultaneously from the water collecting part 10b and the water collecting part 10c of the water collecting pipe 18 via the strainer parts 5b and 5c of the water collecting pipe 3. Taking in, the pumping means 12 as shown in FIG. 1 (F) is arranged to collect water while estimating the groundwater volume. This water sampling is also repeated for a predetermined period of time, and the polluted state of the water sampling and water quality inspection of hard water, soft water, etc. are performed at any time.
【００１５】図１に示す実施例は、地下水の汚染等の恐
れがある最上層の帯水層ａ１の地下水を採水して調査し
た後、下層の帯水層ａ２と帯水層ａ２の地下水を同時に
採水して調査する工程になつているが、必要に応じ帯水
層ごとに、あるいは採水の順序を変えるなど多様な態様
で採水、調査が可能であり、前記の採水調査は、１本の
調査孔２によりその地盤を検出して、この調査孔２内に
集水管３を精度良くセツトした状態で、その集水管３内
に各帯水層ａ１〜ａ３に対応した異なる採水管８，１８
を容易に組み換えセツトして各採水、調査が行われ、そ
の採水管８，１８は、集水管３内に配置されるため膨縮
操作を要しないＯリング等の止水リング９の使用が可能
となつて格別の損傷もなく、容易に取り換えセツトされ
るなど経済性とともに優れた交換性能を有し、多数種の
採水、調査の工程が大幅に低減され、しかも容易に能率
良く、精度良く遂行される。In the embodiment shown in FIG. 1, after collecting and investigating the groundwater of the uppermost aquifer a1 which may cause contamination of groundwater, the groundwater of the lower aquifer a2 and aquifer a2 is collected. It is in the process of collecting water and conducting surveys at the same time, but it is possible to conduct water sampling and surveys in various ways, such as for each aquifer or by changing the sampling sequence as necessary. Is a state in which the ground is detected by one investigation hole 2 and the water collection pipe 3 is set in the investigation hole 2 with high precision, and the water collection pipe 3 has different aquifers corresponding to aquifers a1 to a3. Water sampling pipe 8,18
Each water sampling and investigation is carried out by easily reassembling the water. Since the water sampling pipes 8 and 18 are arranged in the water collecting pipe 3, it is possible to use the water stop ring 9 such as an O-ring which does not require expansion and contraction operation. It has excellent exchange performance as well as economic efficiency, such as easy replacement and no damage, which greatly reduces the number of water sampling and survey processes for many types, and is easy, efficient and accurate. Well done
【００１６】図２に採水管８，１８の他の実施例を示
す。同図中８ａは下端部にメネジ３１ａを設けた採水主
管、１０ａ（１０ｂ，１０ｃ）は多数の孔１０ｄを配設
し上、下部にオネジ３１ｂ、メネジ３１ａを設けた採水
部、８ｃは上側の止水リング９を有し上、下端部にオネ
ジ３１ｂ、メネジ３１ａを設けた継ぎ管、８ｄは下側の
止水リング９を有し上端部にオネジ３１ｂを設け下端部
に止水底１１を付設した底部管であり、前記の止水リン
グ９は、継ぎ管８ｃ及び底部管８ｄの外周に固設した取
付リング９ａに複数のゴム製Ｏリング９ｂを配設して構
成され、集水管３内で優れた止水性能を発揮する。ま
た、止水底１１は、底部管８ｄの下部内に配置した重錘
１１ａと、底部管８ｄの下端に螺合したキャツプ１１ｂ
及びＯリング１１ｃからなり、その重錘１１ａは適宜の
重量に交換可能であつて、前記の各部材を塩ビ等の軽量
な合成樹脂で製造しても採水部１０ａ（１０ｂ，１０
ｃ）を所定の位置に安定せしめ、優れた止水性能を発揮
する構造になつている。前記の採水管８，１８の各部材
は、必要に応じ鉄製パイプとすることも可能であり、前
記の各部材のオネジ３１ｂは逆のメネジに、またメネジ
３１ａは逆のオネジにそれぞれ設計変更することも可能
である。FIG. 2 shows another embodiment of the water sampling pipes 8 and 18. In the figure, 8a is a main water sampling pipe having a female screw 31a at its lower end, 10a (10b, 10c) is provided with a number of holes 10d, and a male screw 31b and a water sampling portion having a female screw 31a are provided at the lower part, and 8c is A joint pipe having an upper water stop ring 9 and an upper thread 31b and a female thread 31a at the lower end, and 8d having a lower water stop ring 9 having an upper thread 31b at the upper end and a water stop bottom 11 at the lower end. Is a bottom pipe with a plurality of rubber O-rings 9b provided on a mounting ring 9a fixed to the outer circumference of the joint pipe 8c and the bottom pipe 8d. Excellent water stopping performance within 3. Further, the water stop bottom 11 includes a weight 11a arranged in a lower portion of the bottom pipe 8d and a cap 11b screwed to a lower end of the bottom pipe 8d.
And the O-ring 11c, the weight 11a of which can be replaced with an appropriate weight, and even if the above-mentioned members are made of lightweight synthetic resin such as PVC, the water sampling portion 10a (10b, 10b
It has a structure that stabilizes c) in place and exhibits excellent water stopping performance. The respective members of the water sampling pipes 8 and 18 may be iron pipes if necessary, and the male screw 31b and the female screw 31a of the respective members are changed in design. It is also possible.
【００１７】この採水管８，１８は、長さの異なる複数
本の採水主管８ａ及び採水部１０ａ（１０ｂ，１０ｃ）
と、複数の継ぎ管８ｃ及び底部管８ｄのセツトとして使
用され、適宜の長さの採水主管８ａに継ぎ管８ｃを螺合
し、継ぎ管８ｃに適宜の長さの採水部１０ａ（１０ｂ，
１０ｃ）を螺合し、必要に応じさらに継ぎ管８ｃ、採水
部１０ａ（１０ｂ，１０ｃ）等を螺合して、最下部に底
部管８ｄを螺合して連結することにより、多様な帯水層
に対応した採水管８，１８として使用され、前記のよう
な交換性と相まつて汎用制を有し、大幅なコスト節減が
可能となる。なお、必要に応じ集水管３についても同様
な継ぎ管機構に構成される。The water sampling pipes 8 and 18 are composed of a plurality of water sampling main pipes 8a having different lengths and a water sampling portion 10a (10b, 10c).
Used as a set of a plurality of connecting pipes 8c and a bottom pipe 8d, the connecting pipe 8c is screwed into the water collecting main pipe 8a of an appropriate length, and the water collecting portion 10a (10b of an appropriate length is attached to the connecting pipe 8c. ，
10c) is screwed, and if necessary, a connecting pipe 8c, a water sampling part 10a (10b, 10c), etc. are screwed together, and a bottom pipe 8d is screwed and connected to the lowermost portion, thereby forming various strips. It is used as the water sampling pipes 8 and 18 corresponding to the water layer, has a general-purpose system in combination with the exchangeability as described above, and enables significant cost savings. If necessary, the water collecting pipe 3 is also configured with a similar joint pipe mechanism.
【００１８】例えば、図１に示すような採水調査り結
果、帯水層ａ１の地下水が汚染し又は水質が悪く、帯水
層ａ２及び帯水層ａ３の地下水が良質で所要の水量が確
保されると判断された場合は、図１（Ｈ）に示すような
井戸孔２ａを掘削して、ケーシングパイプ１４の帯水層
ａ２及び帯水層ａ３に対応する部分に、スクリーンパイ
プ部１４ａ及び１４ｂを形成して、このケーシングパイ
プ１４を井戸孔２ａ内に図示のように配設してセツトす
るとともに、ケーシングパイプ１４に水中ポンプ１５を
配設し、揚水管１６、吐出管１６ａを介して流量せき１
７等に連結して井戸として容易に構築され、良質の地下
水を多量に円滑に汲み上げられる。For example, as a result of the water sampling investigation as shown in FIG. 1, the groundwater in the aquifer a1 is contaminated or the water quality is poor, and the groundwater in the aquifers a2 and a3 is of good quality and the required amount of water is secured. When it is determined that the screen pipe portion 14a and the aquifer a2 and the aquifer a3 of the casing pipe 14 are drilled, the well hole 2a as shown in FIG. 14b is formed, and the casing pipe 14 is disposed in the well hole 2a as shown in the drawing to set the casing pipe 14. At the same time, the submersible pump 15 is disposed in the casing pipe 14 through the pumping pipe 16 and the discharge pipe 16a. Flow cough 1
It is easily constructed as a well by connecting to 7 etc., and a large amount of good quality groundwater can be pumped up smoothly.
【００１９】[0019]
【発明の効果】本発明は、前述のように構成され、調査
孔を掘削して地中の複数の帯水層を検出し、この調査孔
内に複数の止水パツカー付きストレーナー部を有する集
水管を配置して、各ストレーナー部を前記の帯水層に個
別に連通せしめ、この集水管内に異なる止水リング付き
透水部を有する止水底付き採水管を組み換え配置して、
特定の帯水層及び他の帯水層の各地下水を個別に採水、
調査し、１本の調査孔による帯水層の検出、集水管の配
置セツト及びその集水管内への異なる採水管の組み換え
配置セツトにより、採水工程を簡素化して多層地下帯水
層の地下水を容易に個別に採水可能とし、採水の能率及
び精度、信頼性を高めるなど施工性とともに採水調査性
能、信頼性を著しく向上している。Industrial Applicability The present invention is constructed as described above and detects a plurality of aquifers in the ground by excavating a survey hole, and has a strainer section with a plurality of water stop packers in the survey hole. By arranging the water pipes, each strainer part is made to communicate individually with the aquifer, and by arranging the water collecting pipes with the still water bottom having the water permeable parts with different water stopping rings in this water collecting pipe,
Individual collection of groundwater from a specific aquifer and other aquifers,
By investigating and detecting the aquifer with one survey hole, the set up of the water collection pipe and the relocation set of different water collection pipes inside the water collection pipe, the water collection process is simplified and the groundwater of the multi-layered aquifer It is possible to easily collect water individually, and to improve the efficiency, accuracy, and reliability of water collection, as well as the workability, and to significantly improve the water sampling survey performance and reliability.
【００２０】また、採水工程の簡素化、部材点数の低減
等により施工、採水コストが効果的に節減されるなどの
利点を有する。Further, there is an advantage that the construction and water sampling costs are effectively reduced by simplifying the water sampling process and reducing the number of members.
【図１】本発明の一実施例を示す各工程及び装置の各縦
断面図（Ａ）〜（Ｈ）FIG. 1 is a vertical sectional view of each process and apparatus showing an embodiment of the present invention (A) to (H).
【図２】採水管の他の実施例を示す各部分の分解側視図
（Ａ）〜（Ｄ）及び要部拡大断面図（Ｅ）（Ｆ）FIG. 2 is an exploded side view (A) to (D) of each portion showing another embodiment of the water sampling pipe and enlarged sectional views (E) and (F) of a main portion.
【図３】従来例を示す地層図（Ａ）及び各検査孔の断面
図（Ｂ）〜（ｄ）FIG. 3 is a conventional stratum map (A) and cross-sectional views (B) to (d) of each inspection hole.
【図４】他の従来例を示す地層図（Ａ）及び各検査孔の
断面図（Ｂ）〜（ｄ）である。FIG. 4 is a stratum view (A) showing another conventional example and cross-sectional views (B) to (d) of each inspection hole.
ａ１〜ａ３ 帯水層 ２ 調査孔 ３ 集水管 ４ 止水パツカー ５ａ〜５ｃ ストレーナー部 ８，１８ 採水管 ９ 止水リング １０ａ〜１０ｃ 透水部 １１ 止水底 １２ 揚水手段 a1 to a3 aquifer 2 survey hole 3 water collection pipe 4 water stop packer 5a to 5c strainer part 8,18 water sampling pipe 9 water stop ring 10a to 10c water permeation part 11 water stop bottom 12 pumping means
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成６年７月２５日[Submission date] July 25, 1994
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】全図[Correction target item name] All drawings
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図１】 [Figure 1]
【図２】 [Fig. 2]
【図３】 [Figure 3]
【図４】 [Figure 4]
Claims (2)
検出し、複数の止水パツカー付きストレーナー部を有す
る集水管を調査孔内に配置して、各ストレーナー部を前
記の帯水層に個別に連通せしめ、止水リング付き透水部
を有する止水底付き採水管を集水管内に配置して、透水
部を特定の帯水層のみに当該ストレーナー部を介して連
通し特定層の地下水を流入して採水した後、異なる止水
リング付き透水部を有する止水底付き採水管を他の帯水
層に他の当該ストレーナー部を介して連通し他層の地下
水を流入して採水し、各採水によつて各層の地下水を調
査することを特徴とする多層地下帯水層の採水調査法。1. A survey hole is excavated to detect a plurality of aquifers in the ground, and a water collecting pipe having a plurality of strainer sections with water stop packers is arranged in the survey hole, and each strainer section is set to Individually communicate with the aquifer, and place a water sampling pipe with a water stop bottom with a water permeable part with a water stop ring inside the water collection pipe, and connect the water permeable part only to a specific aquifer via the strainer part. After inflowing the groundwater of one layer and collecting water, connect the water sampling pipe with a water-stopping bottom with a different water-permeable part with a water-stop ring to another aquifer through the other strainer part and inflow the groundwater of another layer. A method for collecting water in a multi-layered aquifer, which is characterized in that each layer of water is sampled and groundwater of each layer is investigated.
水パツカー付きストレーナー部を有し調査孔内に配置し
て前記の帯水層に個別に連通する集水管と、止水リング
付き透水部を有し特定の帯水層のみに当該ストレーナー
部を介して連通し特定層の地下水を流入して採水する止
水底付き採水管と、異なる止水リング付き透水部を有し
他の帯水層に他の当該ストレーナー部を介して連通し他
層の地下水を流入して採水する止水底付き採水管と、採
水管内の地下水の揚水手段とを具備したことを特徴とす
る多層地下帯水層の採水調査法装置。2. A water collecting pipe which has a plurality of strainer sections with water blocking packers corresponding to a plurality of aquifers in the ground and is arranged in an inspection hole and communicates individually with the aquifer, and a water stoppage. It has a water-permeable part with a ring and has a water-collecting pipe with a water-stopping bottom that connects to a specific aquifer only via the strainer part to inject and collect groundwater of a specific layer. It is characterized in that it is provided with a water sampling pipe with a water stop bottom for communicating with another aquifer through the other strainer part to inject and collect ground water of another layer, and means for pumping ground water in the water sampling pipe. Multi-layer underground aquifer water sampling survey method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2915994A JP2916521B2 (en) | 1994-02-02 | 1994-02-02 | Investigation method of water sampling of multi-layered aquifer and its water sampling investigation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2915994A JP2916521B2 (en) | 1994-02-02 | 1994-02-02 | Investigation method of water sampling of multi-layered aquifer and its water sampling investigation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07217362A true JPH07217362A (en) | 1995-08-15 |
| JP2916521B2 JP2916521B2 (en) | 1999-07-05 |
Family
ID=12268489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2915994A Expired - Fee Related JP2916521B2 (en) | 1994-02-02 | 1994-02-02 | Investigation method of water sampling of multi-layered aquifer and its water sampling investigation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2916521B2 (en) |
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| JP2007255167A (en) * | 2006-03-27 | 2007-10-04 | Wide Harbor:Kk | Water gathering method of multilayer water intake layer in existing well and its strainer packer device |
| CN102518141A (en) * | 2011-12-19 | 2012-06-27 | 同济大学 | Deep foundation pit dewatering and decompressing combination well controlled in subsection manner |
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