JPH0112919B2 - - Google Patents
Info
- Publication number
- JPH0112919B2 JPH0112919B2 JP55118703A JP11870380A JPH0112919B2 JP H0112919 B2 JPH0112919 B2 JP H0112919B2 JP 55118703 A JP55118703 A JP 55118703A JP 11870380 A JP11870380 A JP 11870380A JP H0112919 B2 JPH0112919 B2 JP H0112919B2
- Authority
- JP
- Japan
- Prior art keywords
- casing
- cone
- water
- valve body
- ring
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- 238000005070 sampling Methods 0.000 claims description 21
- 239000003673 groundwater Substances 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 11
- 239000003566 sealing material Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012372 quality testing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は主として地下滞水層の水質を検査する
際に使用される採水装置に関し、採水時の異物質
の混入を防止し正確な水質検査を可能とすること
および採水作業の簡便化をはかることを目的とす
る。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a water sampling device used mainly for testing the water quality of underground aquifers, and is concerned with preventing the contamination of foreign substances during water sampling and ensuring accurate The purpose is to enable water quality testing and simplify water sampling work.
（従来の技術）
種々の事情により地中の間隙水、特に透水層に
存する滞水の水質如何を検査する場合において、
従来は地下に所定深さまでボーリングした掘削穴
の底部に集積した地下水を公知の簡便な容器等を
利用してくみ上げ採取する方法が最も一般的にお
こなわれている。またさらに進歩したものとして
は実開昭48−55885号に開示されているような構
造の採水器を用い、これを前記掘削穴内に順次引
き下ろし、その基底部に溜まつた地下水をくみ上
げ採取することも考えられている。(Prior art) When inspecting the water quality of underground pore water, especially stagnant water existing in permeable layers due to various circumstances,
Conventionally, the most common method has been to pump up and collect groundwater that has accumulated at the bottom of an excavation hole drilled underground to a predetermined depth using a known simple container or the like. In a more advanced method, a water sampler with a structure as disclosed in Utility Model Application Publication No. 48-55885 is used, which is successively lowered into the excavated hole to pump up and collect the groundwater accumulated at the base of the hole. It is also being considered.
（発明の解決すべき課題）
しかし上記いずれの場合においても掘削穴穿設
の際における中間土砂の混入、或いは予定する深
さの滞水層よりも上方の間隙水が混入するなどし
て結局目的とする滞水層の局部的地下水の正確な
水質検査を不可能であつたため、結局或る程度の
許容範囲内においておよその検討により水質の検
査を完了していたのが現状である。(Problems to be Solved by the Invention) However, in any of the above cases, the purpose may not be achieved due to the mixing of intermediate soil or the mixing of interstitial water above the aquifer layer at the planned depth. As it has been impossible to accurately test the water quality of local groundwater in the aquifer layer, the current situation is that water quality tests have been completed by rough examination within a certain allowable range.
しかし周知のように工場排水の影響等による地
下水質の良否をより正確に識別する必要性とその
重要性の存することは論ずるまでもなく、必然的
に地下水の含有成分が問題になるとき、より正確
な水質検査を実施するためには目的個所以外の地
中成分等の混入を十分に阻止しなければならな
い。 However, as is well known, it goes without saying that there is a need and importance of more accurately identifying the quality of groundwater due to the influence of industrial wastewater, etc. In order to conduct accurate water quality testing, it is necessary to sufficiently prevent the contamination of underground components other than the target area.
また地下水の採水に際しては望ましくはあらか
じめ公知のボーリング装置を用いて掘削したボー
リング孔底よりさらに下方の地中内においておこ
なう方がより完全であることは理論上確立されて
はいても前記した公知の採水器ではその構造上か
らみて上記の用途に供することはできない。 Furthermore, although it has been theoretically established that it is more complete to sample groundwater from underground, which is further below the bottom of a borehole excavated in advance using a known boring device, it is well known that Due to its structure, this water sampler cannot be used for the above purpose.
（課題を解決するための手段）
そこで本発明者は長年にわたり種々の実験と研
究を重ねた結果、目的個所の地下滞水のみを確実
に採水できると共に、とくにボーリング孔底より
さらに下方の地中内においての採水を可能とし、
しかも使用後において分解洗浄の容易な採水装置
を完成するに至つたものであり、具体的には管状
体を継ぎ足して滞水層内に順次送り込まれるとこ
ろの比較的下方部内周側にリング状のストツパー
を突設させたケーシングと、該ケーシング内に遊
嵌される弁体とからなり、弁体は上端部に前記リ
ング状ストツパーの上方に位置するフランジを、
また下端部にリング状ストツパーの下方に位置
し、しかも先端部を鋭突にし、これをケーシング
の先端部より下方に突出させるようにしたコーン
を、それぞれ前記ケーシングの内周面に沿つて上
下方向摺動自在に設けるとともに、弁体内には一
方を前記フランジの上面側に、また他方を前記コ
ーン寄りの側面にそれぞれ開口させた通水孔を設
け、さらに該通水孔内には砂袋を充填してなるこ
とを特徴とした地下水の採水装置に関する。(Means for Solving the Problem) As a result of various experiments and research carried out over many years, the inventor of the present invention has found that it is possible to reliably sample only the underground water at the target location, and in particular, to collect underground water from further below the bottom of the borehole. Enables water sampling in Nakauchi,
In addition, we have completed a water sampling device that can be easily disassembled and cleaned after use. Specifically, a ring-shaped body is added to the inner peripheral side of the relatively lower part where the water is sequentially fed into the water retention layer by adding a tubular body. It consists of a casing with a protruding stopper, and a valve body that is loosely fitted into the casing, and the valve body has a flange located above the ring-shaped stopper at its upper end.
In addition, a cone, which is located below the ring-shaped stopper at the lower end and has a sharp tip and protrudes downward from the tip of the casing, is attached in the vertical direction along the inner circumferential surface of the casing. In addition to being slidably provided, a water passage hole is provided in the valve body with one opening on the upper surface side of the flange and the other opening on the side surface closer to the cone, and furthermore, a sand bag is provided in the water passage hole. This invention relates to a groundwater sampling device characterized by being filled with groundwater.
（作用）
本願の発明は上記した構成において、あらかじ
め公知のボーリング機器により一定の深さまでボ
ーリングされた掘削穴内に採水装置を、筒体を順
次継ぎ足しながら目的深さの位置にまで降下さ
せ、あるいは先端のコーンをボーリング穴の孔底
に当接させた状態において上方に継ぎ足した筒体
の上端部を叩打し、または筒体の内側より弁体上
方のフランジ部を叩打しつつケーシングとともに
コーンを孔底よりさらに地中へと進入させつつ地
中の目的とする深さにまで沈下させる。(Function) In the above-described configuration, the invention of the present application lowers the water sampling device into an excavated hole that has been previously bored to a certain depth with a known boring machine until it reaches the desired depth while sequentially adding cylindrical bodies, or With the cone at the tip in contact with the bottom of the borehole, tap the upper end of the cylindrical body that has been added above, or tap the flange above the valve body from the inside of the cylindrical body and drill the cone together with the casing. It is allowed to penetrate further underground from the bottom and sink to the desired depth underground.
採水装置が予定深さに達したところでケーシン
グを固定し、さらにケーシングの内側から前記フ
ランジの上面を叩打する等の手段によりコーンを
ケーシングから下方へ離脱させる。 When the water sampling device reaches a predetermined depth, the casing is fixed, and the cone is removed downward from the casing by, for example, hitting the upper surface of the flange from inside the casing.
コーンの離脱に伴つて弁体がケーシングの開口
方向へ移動するが、フランジがケーシングのリン
グ状ストツパーに当接するのでそれ以上は移動す
ることがない。 As the cone is removed, the valve body moves toward the opening of the casing, but since the flange contacts the ring-shaped stopper of the casing, it does not move any further.
開口されたケーシングの先端部より予定個所に
地下水がはいり込み、弁体の通水孔内に嵌装され
ている砂袋内を順次浸透通過しつつフランジ上面
よりケーシング内に流入する。ケーシング内に集
積した水はケーシング自体と共に地上に引き上げ
られる。 Groundwater enters the predetermined location from the opened tip of the casing, and flows into the casing from the upper surface of the flange while sequentially permeating through the sand bag fitted into the water hole of the valve body. The water that accumulates within the casing is pulled up to the ground along with the casing itself.
すなわち図示しない吊り上げ手段により弁体を
上方に吊り上げると、これに伴つてコーンも上方
に持ち上げられ、適当なシール材を介してケーシ
ングの先端部内周側にコーンの外側周面によりほ
とんどシールされ、さらにそのまま前記弁体を吊
り上げることによりコーンの上端部がケーシング
のリング状ストツパーに当接し、次いでケーシン
グを持ち上げる。 That is, when the valve body is lifted upward by a lifting means (not shown), the cone is also lifted upward, and the inner circumferential side of the tip of the casing is almost sealed by the outer circumferential surface of the cone through an appropriate sealing material. By lifting the valve body as it is, the upper end of the cone comes into contact with the ring-shaped stopper of the casing, and then the casing is lifted.
したがつてコーンとリング状ストツパーとの当
接とシール材とによりケーシング内に集積した地
下水はほとんど漏れることなく採水装置Ａを上方
に吊り上げて地上にて集積地下水を容易に採水で
きる。 Therefore, due to the contact between the cone and the ring-shaped stopper and the sealing material, the groundwater accumulated in the casing hardly leaks, and the water sampling device A can be lifted upward to easily sample the accumulated groundwater on the ground.
また使用後は弁体よりコーンを取り外して浸入
残溜物を除去し、完全に清掃して次回の使用に備
える。 After use, the cone is removed from the valve body to remove any infiltrated residue and thoroughly cleaned in preparation for next use.
（実施例）
以下において本発明の具体的な内容を図示の一
実施例をもとに説明すると、図においてＡは本発
明にかかる採水装置の要部をあらわすもので、１
はケーシング、５は先端にコーン３を着脱自在に
装着した弁体を示す。(Example) The specific content of the present invention will be explained below based on an illustrated example. In the figure, A represents the main part of the water sampling device according to the present invention, and 1
Reference numeral 5 indicates a casing, and 5 indicates a valve body having a cone 3 removably attached to its tip.
ケーシング１は鋼製で上端部内周面に雌ネジ部
１ａを有し、該部分に鎖線で示す別の筒体１１の
雄ネジ部を螺入させて採水予定部の深さに応じ順
次必要長さ分に応じた本数の筒体１１を継ぎ足す
ことができる。 The casing 1 is made of steel and has a female threaded part 1a on the inner peripheral surface of its upper end, into which the male threaded part of another cylindrical body 11 shown by a chain line is screwed in order according to the depth of the planned water sampling area. The number of cylindrical bodies 11 can be added according to the length.
さらにケーシング１の先端（下端）寄りの内周
面側にはリング状のストツパー２が軸心方向に向
けて全周方向にわたり一体に突設されている。 Furthermore, a ring-shaped stopper 2 is integrally provided on the inner circumferential surface of the casing 1 near the tip (lower end) so as to protrude in the axial direction over the entire circumferential direction.
弁体５は上端部に前記したリング状ストツパー
２の上方に位置するフランジ６を、また下端部に
リング状ストツパー２の下方に位置し、しかも先
端部を鋭突にし、これをケーシング１の先端部よ
り下方に突出させるところのケーシング１の開口
部内に出没自在としたコーン３を、それぞれ前記
ケーシング１の内周面に沿つて上下方向摺動自在
となるように設けるとともに、弁体５内には一方
を上記フランジ６の上面側に、また他方を前記コ
ーン３寄りの側面にそれぞれ開口させた通水孔５
ｂを設け、さらに該通水孔５ｂ内には細かい砂を
充填した砂袋８が填装されている。 The valve body 5 has a flange 6 located above the ring-shaped stopper 2 at its upper end, and a flange 6 located below the ring-shaped stopper 2 at its lower end, and has a sharp tip. A cone 3 is provided in the opening of the casing 1, which protrudes downward from the opening, and is provided so as to be slidable in the vertical direction along the inner circumferential surface of the casing 1. is a water passage hole 5 with one side opened on the upper surface side of the flange 6 and the other side opened on the side surface closer to the cone 3.
b, and a sand bag 8 filled with fine sand is loaded into the water passage hole 5b.
さらに弁体５の先端部（下端部）は雄ネジ部５
ａが形成され、シール材９を介してこの部分をリ
ング状ストツパー２より外方に突出させるととも
に、これにコーン３の取付部５ｃにおける雌ネジ
部３ｂが螺入固定される。 Furthermore, the tip (lower end) of the valve body 5 has a male threaded portion 5.
a is formed, and this part is made to protrude outward from the ring-shaped stopper 2 via the sealing material 9, and the female threaded part 3b of the attachment part 5c of the cone 3 is screwed into this part.
さらにコーン３は先端（下部）を鋭突に形成す
るとともに、ケーシング１の内径に略等しく、し
かもその周面にシール溝３ａを有し、該シール溝
３ａ内にはケーシング１の下端部内周面に圧接し
得る程度のシール材４が嵌装され、これによりケ
ーシング１の先端開口部より外方に向けて出没自
在に構成されている。 Further, the cone 3 has a sharp tip (lower part), is approximately equal to the inner diameter of the casing 1, and has a sealing groove 3a on its circumferential surface, and the inner circumferential surface of the lower end of the casing 1 is provided in the sealing groove 3a. A sealing material 4 is fitted to the extent that it can come into pressure contact with the casing 1, and is configured to be freely retractable outward from the opening at the tip of the casing 1.
尚前記リング状ストツパー２は、弁体５のフラ
ンジ部６とコーン３との間に位置し、しかもフラ
ンジ部６およびコーン３より小径となるように構
成される。 The ring-shaped stopper 2 is located between the flange portion 6 of the valve body 5 and the cone 3, and is configured to have a smaller diameter than the flange portion 6 and the cone 3.
然して使用時にはあらかじめ既知のボーリング
手段により一定の深さにまで穿設されたボーリン
グ孔内に上記採水装置Ａを下ろし、あるいは該装
置Ａの先端のコーン３を孔底に当接させた状態に
おいてケーシング１の上端又は弁体５のフランジ
部６の上面側を叩打しつつ採水装置Ａを孔底より
さらに一定の深度に至るまで地中内に沈下させ
る。 However, when in use, the water sampling device A is lowered into a borehole previously drilled to a certain depth by a known boring means, or with the cone 3 at the tip of the device A in contact with the bottom of the hole. While hitting the upper end of the casing 1 or the upper surface side of the flange portion 6 of the valve body 5, the water sampling device A is lowered into the ground from the bottom of the hole to a certain depth.
この際にコーン３とケーシング１の内周面との
間にはシール材４が介在されているために中間層
における中間土砂の混入、あるいは他の個所にお
ける間隙水の混入が阻止される。 At this time, since a sealing material 4 is interposed between the cone 3 and the inner circumferential surface of the casing 1, mixing of intermediate earth and sand in the intermediate layer or mixing of pore water in other parts is prevented.
採水装置Ａがボーリング孔内又は地中の採水す
べき予定深さの位置に達したところでケーシング
１の内方より弁体５のフランジ６の上面を叩打す
る等の手段によりコーン３をケーシング１から離
脱させると第２図に示したように地中の間隙水が
矢印で示す方向に弁体５の通水孔５ｂ内において
装填された砂袋８内を浸透通過し、ここである程
度の比較的粒度の大きい不純物類を濾過しつつケ
ーシング１内にはいり込み、そこに集積される。
尚図中Ｗはその集積された地下水を示す。 When the water sampling device A reaches the planned depth in the borehole or underground where water should be sampled, the cone 3 is cased by means such as hitting the upper surface of the flange 6 of the valve body 5 from inside the casing 1. 1, as shown in FIG. 2, the interstitial water in the ground permeates through the sand bag 8 loaded in the water passage hole 5b of the valve body 5 in the direction shown by the arrow. It enters the casing 1 while filtering impurities with a relatively large particle size, and is accumulated there.
In addition, W in the figure indicates the accumulated groundwater.
採水終了後図示しない吊り上げ手段により弁体
５を上方に吊り上げると、これに伴つてコーン３
も上方に持ち上げられ、シール材４を介してケー
シング１の先端部内周側にコーン３の外側周面に
よりほとんどシールされる。さらにそのまま前記
弁体５を上方に吊り上げることによりコーン３の
上端部がケーシング１のリング状ストツパー２に
当接し、ついでケーシング１を持ち上げる。 After water sampling is completed, when the valve body 5 is lifted upward by a lifting means (not shown), the cone 3 is lifted upward.
The cone 3 is also lifted upward, and is almost sealed to the inner circumferential side of the tip of the casing 1 by the outer circumferential surface of the cone 3 via the sealing material 4 . Further, by lifting the valve body 5 upward, the upper end of the cone 3 comes into contact with the ring-shaped stopper 2 of the casing 1, and then the casing 1 is lifted.
したがつてコーン３とリング状ストツパー２と
の当接と、シール材４とによりケーシング１内に
集積した地下水はほとんど漏れることなく採水装
置Ａを上方に吊り上げて地上にて集積地下水を容
易に採水することができる。 Therefore, due to the contact between the cone 3 and the ring-shaped stopper 2 and the sealing material 4, the groundwater accumulated in the casing 1 hardly leaks, and the water sampling device A is lifted upward to easily collect the accumulated groundwater on the ground. Water can be sampled.
さらに使用後は弁体５よりコーン３を分離させ
て浸入残溜物を除去し、完全に清掃して次回の使
用に備える。 Furthermore, after use, the cone 3 is separated from the valve body 5 to remove any infiltrated residue, and is completely cleaned in preparation for next use.
（発明の効果）
本発明は既述したように、内周側にリング状ス
トツパーを突設させたケーシング、および該ケー
シング内に遊嵌され、上端に上記リング状ストツ
パーの上方に位置するフランジを、また下端にリ
ング状ストツパーの下方に位置し、しかも先端部
を鋭突にし、これをケーシングの先端部より下方
に突出させるようにしたコーンを有する弁体とか
らなるものであるために、従来の如く単にボーリ
ング孔内の所定深さにおける採水をおこなう場合
のみならず、とくにボーリング孔底よりさらに深
い地中に採水装置を沈下せしめて目的個所の地下
水の採水をおこなうことができる。(Effects of the Invention) As described above, the present invention includes a casing having a ring-shaped stopper protruding from the inner circumferential side, and a flange that is loosely fitted into the casing and positioned above the ring-shaped stopper at the upper end. In addition, since the valve body has a cone located below the ring-shaped stopper at the lower end and has a sharp tip so as to protrude downward from the tip of the casing, conventional Not only can water be sampled at a predetermined depth within a borehole, but the water sampling device can also be lowered into the ground deeper than the bottom of the borehole to sample groundwater at a target location.
さらに弁体の通水孔内には砂袋を填装したため
に、採水にあたり浸入物のほとんどが砂中に捕取
され、他の物質等の混入を招くことが全くなく目
的とする区域の地下水を確実に採水できて正確な
水質検査を実施でき、しかも使用後は前記砂袋を
任意に交換できるほか、コーンを弁体より分離し
て清掃できるために次期使用に際してのメンテナ
ンスも容易で作業性に優れる等の有益な作用効果
を奏する。 Furthermore, since a sand bag is packed into the water passage hole of the valve body, most of the infiltrated material is captured in the sand during water sampling, and there is no contamination of other substances, and the target area is completely covered. Groundwater can be reliably sampled and accurate water quality tests can be carried out. Furthermore, the sand bag can be replaced at will after use, and the cone can be separated from the valve body for cleaning, making maintenance easy for the next use. It has beneficial effects such as excellent workability.
第１図は本発明の一実施例である採水装置の要
部縦断面図、第２図はその使用状態をあらわした
採水装置の要部縦断面図である。
１……ケーシング、２……リング状ストツパ
ー、３……コーン、４……シール材、５……弁
体、５ｂ……通水孔、６……フランジ、８……砂
袋。
FIG. 1 is a vertical cross-sectional view of a main part of a water sampling device according to an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of a main part of the water sampling device showing its usage state. DESCRIPTION OF SYMBOLS 1... Casing, 2... Ring-shaped stopper, 3... Cone, 4... Seal material, 5... Valve body, 5b... Water hole, 6... Flange, 8... Sand bag.
Claims (1)
れるところの比較的下方部内周側にリング状のス
トツパーを突設させたケーシングと、該ケーシン
グ内に遊嵌される弁体とからなり、弁体は上端部
に前記リング状ストツパーの上方に位置するフラ
ンジを、また下端部にリング状ストツパーの下方
に位置し、しかも先端部を鋭突にし、これをケー
シングの先端部より下方に突出させるようにした
コーンを、それぞれ前記ケーシングの内周面に沿
つて上下方向摺動自在となるよう設けるととも
に、弁体内には一方を前記フランジの上面側に、
また他方を前記コーン寄りの側面にそれぞれ開口
させた通水孔を設け、さらに該通水孔内には砂袋
を填装してなることを特徴とした地下水の採水装
置。1 Consists of a casing with a ring-shaped stopper protruding from the inner circumferential side of the relatively lower part where tubular bodies are added and sequentially fed into the water reservoir layer, and a valve body loosely fitted into the casing. The body has a flange located above the ring-shaped stopper at the upper end, and a flange located below the ring-shaped stopper at the lower end, and has a sharp tip so as to protrude downward from the tip of the casing. cones are provided so as to be slidable in the vertical direction along the inner circumferential surface of the casing, and one cone is provided in the valve body on the upper surface side of the flange.
A groundwater sampling device characterized in that a water passage hole is provided with the other side opening on the side surface closer to the cone, and a sand bag is further filled in the water passage hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11870380A JPS5744098A (en) | 1980-08-27 | 1980-08-27 | Water extraction apparatus for underground water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11870380A JPS5744098A (en) | 1980-08-27 | 1980-08-27 | Water extraction apparatus for underground water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5744098A JPS5744098A (en) | 1982-03-12 |
| JPH0112919B2 true JPH0112919B2 (en) | 1989-03-02 |
Family
ID=14743040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11870380A Granted JPS5744098A (en) | 1980-08-27 | 1980-08-27 | Water extraction apparatus for underground water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5744098A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5275831B2 (en) * | 2009-01-28 | 2013-08-28 | 東急建設株式会社 | Apparatus and method for installing temperature sensor in the ground |
| JP6316225B2 (en) * | 2015-02-24 | 2018-04-25 | 復建調査設計株式会社 | On-site permeability test device and installation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5028781Y2 (en) * | 1971-10-30 | 1975-08-25 |
-
1980
- 1980-08-27 JP JP11870380A patent/JPS5744098A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5744098A (en) | 1982-03-12 |
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