JP3263381B2 - Bedrock moisture content measuring device - Google Patents
Bedrock moisture content measuring deviceInfo
- Publication number
- JP3263381B2 JP3263381B2 JP19171199A JP19171199A JP3263381B2 JP 3263381 B2 JP3263381 B2 JP 3263381B2 JP 19171199 A JP19171199 A JP 19171199A JP 19171199 A JP19171199 A JP 19171199A JP 3263381 B2 JP3263381 B2 JP 3263381B2
- Authority
- JP
- Japan
- Prior art keywords
- water content
- rock
- pipe
- measuring
- measuring device
- 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
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、トンネルや地下発
電所、石油・圧縮空気等の岩盤貯蔵施設、放射性廃棄物
処理場などにおいて、大気に接している岩盤表面から岩
盤内部までの含水状態を把握する際に適用するに好適な
岩盤の含水量測定装置に関するものである。BACKGROUND OF THE INVENTION The present invention relates to a method for measuring the water content from the surface of a rock in contact with the atmosphere to the inside of the rock in tunnels, underground power plants, rock storage facilities for oil and compressed air, radioactive waste disposal sites, and the like. The present invention relates to an apparatus for measuring the water content of rock mass, which is suitable for use in grasping.
【０００２】[0002]
【従来の技術】従来、岩盤の含水量を調べる方法として
は、対象となる岩盤をボーリング（穿孔）して岩石コア
を採取し、直接その岩石コアの含水量を測定する方法が
一般的であった。2. Description of the Related Art Conventionally, as a method of examining the water content of a rock mass, a method of boring (boring) a target rock mass to collect a rock core and directly measuring the water content of the rock core has been generally used. Was.
【０００３】[0003]
【発明が解決しようとする課題】しかし、こうした直接
計測方法では、測定の度に岩石コアを採取しなければな
らないため、手間がかかって面倒であるばかりか、同一
箇所において含水量の経時変化を見ることができないと
いう不都合があった。However, in such a direct measurement method, since a rock core must be collected every time the measurement is performed, it is not only troublesome and troublesome, but also a time-dependent change in water content at the same location is required. There was an inconvenience of not being able to see it.
【０００４】なお、この方法以外に、土質地盤の含水量
調査方法に倣ってテンシオメーターや土壌水分計等の機
器を利用する方法が考えられるが、センサーの岩盤への
設置方法が確立されていないことに加えて、岩盤の表面
部以外にセンサーを設置することが困難であることか
ら、実用化されるまでには至っていない。[0004] In addition to this method, a method of using a device such as a tensiometer or a soil moisture meter in accordance with a method of examining the water content of the soil soil is conceivable, but a method of installing the sensor on the rock has been established. In addition to that, it is difficult to install sensors outside the surface of the bedrock, so they have not yet been put to practical use.
【０００５】本発明は、このような事情に鑑み、岩石コ
アの採取を不要とすることにより、含水量の測定を簡便
化するとともに、同一箇所での含水量の経時変化を見る
ことができるようにした岩盤の含水量測定装置を提供す
ることを目的とする。In view of such circumstances, the present invention simplifies the measurement of the water content by eliminating the need to collect rock cores, and allows the change in the water content at the same location with time to be observed. It is an object of the present invention to provide an apparatus for measuring the water content of rock mass.
【０００６】[0006]
【課題を解決するための手段】すなわち本発明に係る岩
盤の含水量測定装置（１）は、先端が閉塞されたパイプ
（２）を有し、このパイプの先端近傍に孔（２ａ）を形
成し、前記パイプの外周に前記孔を覆う形で伸縮性スリ
ーブ（５）を当該パイプの径方向に膨張収縮自在に設
け、この伸縮性スリーブの外周に緩衝材（６）を設け、
この緩衝材の表面にプローブ（７）を貼設し、このプロ
ーブに電磁波を流して岩盤（１３）の比誘電率を計測す
る計測手段（１０）を設け、この計測手段によって計測
された比誘電率に基づいて前記岩盤の含水量を算出する
ようにして構成される。こうした構成を採用することに
より、岩盤の含水量を調べるには、パイプの先端をボー
リング孔（１５）に挿通してプローブを圧着した後、比
誘電率を測定して含水量を算出するだけで済むため、測
定の度に岩石コアを採取する煩雑な作業が不要となる。That is, a rock water content measuring device (1) according to the present invention has a pipe (2) having a closed end, and a hole (2a) is formed near the end of the pipe. An elastic sleeve (5) is provided on the outer periphery of the pipe so as to be capable of expanding and contracting in the radial direction of the pipe so as to cover the hole, and a cushioning material (6) is provided on the outer periphery of the elastic sleeve.
A probe (7) is attached to the surface of the cushioning material, and a measuring means (10) is provided for measuring the relative permittivity of the rock (13) by flowing an electromagnetic wave to the probe, and the relative permittivity measured by the measuring means is provided. It is configured to calculate the water content of the rock based on the rate. In order to check the water content of the bedrock by adopting such a configuration, it is only necessary to insert the tip of the pipe into the boring hole (15), crimp the probe, measure the relative permittivity, and calculate the water content. This eliminates the need for complicated work of collecting rock cores each time measurement is performed.
【０００７】ここで、緩衝材としては、弾力性があって
比誘電率が既知のものであれば、いかなるものでも用い
ることができる。また、プローブの貼設方向について
は、円周方向であると孔軸方向であるとを問わない。Here, as the cushioning material, any material having elasticity and a known relative dielectric constant can be used. Regarding the direction in which the probe is attached, it does not matter whether the direction is the circumferential direction or the hole axis direction.
【０００８】なお、括弧内の符号は図面において対応す
る要素を表す便宜的なものであり、従って、本発明は図
面上の記載に限定拘束されるものではない。このことは
「特許請求の範囲」の欄についても同様である。[0008] Incidentally, reference numerals in parentheses are for convenience showing corresponding elements in the drawings, and therefore, the present invention is not limited to the description on the drawings. The same applies to the column of “Claims”.
【０００９】[0009]
【発明の実施の形態】以下、本発明のいくつかの実施形
態を図面に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of the present invention will be described below with reference to the drawings.
【００１０】まず、図１〜図３に基づいて第１の実施形
態を説明する。First, a first embodiment will be described with reference to FIGS.
【００１１】図１は本発明に係る岩盤の含水量測定装置
の第１の実施形態を示す断面図、図２は図１に示す岩盤
の含水量測定装置の要部を示す詳細図、図３は図２に示
す岩盤の含水量測定装置のＡ−Ａ線による拡大断面図で
ある。FIG. 1 is a cross-sectional view showing a first embodiment of a rock water content measuring apparatus according to the present invention, FIG. 2 is a detailed view showing a main part of the rock water content measuring apparatus shown in FIG. 1, and FIG. FIG. 3 is an enlarged cross-sectional view taken along line AA of the apparatus for measuring water content of rock shown in FIG. 2.
【００１２】この岩盤の含水量測定装置１は、図１に示
すように、先端が閉塞されたパイプ２を有しており、パ
イプ２の先端近傍の側面には複数個の孔２ａがパイプ２
の内外を連通する形で穿設されている。パイプ２の先端
にはパッカー部３が装着されており、パッカー部３は、
図２に示すように、伸縮性スリーブ５、緩衝材６および
プローブ７から構成されている。As shown in FIG. 1, the rock moisture content measuring device 1 has a pipe 2 having a closed end, and a plurality of holes 2a are formed in a side surface near the end of the pipe 2.
It is pierced so that it can communicate inside and outside. A packer part 3 is attached to the tip of the pipe 2, and the packer part 3 is
As shown in FIG. 2, it is composed of an elastic sleeve 5, a cushioning material 6 and a probe 7.
【００１３】すなわち、パイプ２の先端近傍にはゴム製
の伸縮性スリーブ５がすべての孔２ａを覆う形で周設さ
れており、この伸縮性スリーブ５はパイプ２の径方向に
膨張収縮することができる。また、伸縮性スリーブ５の
外周には発泡ポリスチレン（発泡スチロール）製の緩衝
材６が取り付けられており、緩衝材６の表面には、図２
および図３に示すように、所定枚数（例えば、２枚）の
テープ状のプローブ７が円周方向に貼設されている。That is, a rubber elastic sleeve 5 is provided in the vicinity of the end of the pipe 2 so as to cover all the holes 2a, and the elastic sleeve 5 expands and contracts in the radial direction of the pipe 2. Can be. A cushioning material 6 made of expanded polystyrene (styrene foam) is attached to the outer periphery of the elastic sleeve 5.
As shown in FIG. 3, a predetermined number (for example, two) of tape-shaped probes 7 are attached in the circumferential direction.
【００１４】さらに、パッカー部３の各プローブ７に
は、図１に示すように、TDR（Time Domain Reflectomet
ry）法による計測手段１０が同軸ケーブル９を介して接
続されている。Further, as shown in FIG. 1, a TDR (Time Domain Reflectomet
The measuring means 10 by the ry) method is connected via the coaxial cable 9.
【００１５】岩盤の含水量測定装置１は以上のような構
成を有しているので、これを用いて岩盤の含水量を調べ
る際には、図１に示すように、まず、対象となる岩盤１
３をボーリングしてボーリング孔１５を穿つ。勿論、す
でにボーリング孔１５が形成されている場合はボーリン
グする必要はない。Since the rock moisture content measuring device 1 has the above-described configuration, when examining the moisture content of the rock using this device, first, as shown in FIG. 1
3 is bored and a boring hole 15 is drilled. Of course, when the boring hole 15 is already formed, it is not necessary to perform boring.
【００１６】次に、このボーリング孔１５に岩盤の含水
量測定装置１のパッカー部３を所定の深度まで挿通した
後、ボーリング孔１５の孔壁にプローブ７を圧着する。
それには、パイプ２の後端にコンプレッサー（またはポ
ンプ）等を接続し、パイプ２内に圧縮空気（または水）
を送り込む。すると、その圧縮空気（または水）はパイ
プ２の孔２ａを通って伸縮性スリーブ５内に供給される
ため、その空気圧（または水圧）によって伸縮性スリー
ブ５がパイプ２の径方向に膨張し、ボーリング孔１５の
孔壁に当接する。そして、すべてのプローブ７がボーリ
ング孔１５の孔壁に圧着される適度な空気圧（または水
圧）に達したところで、圧縮空気（または水）の供給を
停止する。Next, after the packer portion 3 of the apparatus 1 for measuring the water content of the bedrock is inserted into the borehole 15 to a predetermined depth, the probe 7 is pressed against the hole wall of the borehole 15.
To do so, connect a compressor (or pump) to the rear end of the pipe 2 and put compressed air (or water) inside the pipe 2.
Send. Then, since the compressed air (or water) is supplied into the elastic sleeve 5 through the hole 2a of the pipe 2, the elastic sleeve 5 expands in the radial direction of the pipe 2 by the air pressure (or water pressure), It contacts the hole wall of the boring hole 15. Then, when all the probes 7 reach an appropriate air pressure (or water pressure) to be pressed against the hole wall of the boring hole 15, the supply of the compressed air (or water) is stopped.
【００１７】この状態で、計測手段１０を駆動して、各
プローブ７に電磁波を流し、パッカー部３近傍の岩盤１
３の比誘電率を測定する。In this state, the measuring means 10 is driven to cause an electromagnetic wave to flow through each probe 7, and the rock 1 near the packer section 3 is moved.
The relative dielectric constant of No. 3 is measured.
【００１８】次いで、こうして測定された比誘電率に基
づき、対象となる岩盤１３の含水量を算出する。それに
は、対象となる岩盤１３から得られた試料を用いて、含
水量を様々に変化させたときの比誘電率を測定して両者
の対応関係を予め求めておき、この対応関係に基づき、
計測手段１０によって計測された比誘電率から含水量を
求める。Next, the water content of the target bedrock 13 is calculated based on the relative dielectric constant thus measured. To do so, using a sample obtained from the target rock 13 and measuring the relative permittivity when the water content is variously changed, the correspondence between the two is determined in advance, and based on this correspondence,
The water content is determined from the relative permittivity measured by the measuring means 10.
【００１９】こうして、対象となる岩盤１３の含水量が
算出されたところで、伸縮性スリーブ５内の空気圧（ま
たは水圧）を解放して収縮させた後、パイプ２を引き抜
く。すると、パッカー部３がボーリング孔１５から撤去
され、ここで含水量測定作業が終了する。When the water content of the target rock 13 is calculated in this way, the air pressure (or water pressure) in the elastic sleeve 5 is released and contracted, and then the pipe 2 is pulled out. Then, the packer unit 3 is removed from the boring hole 15, and the operation of measuring the water content ends here.
【００２０】このように、岩盤１３の含水量を調べるに
は、岩盤の含水量測定装置１のパッカー部３をボーリン
グ孔１５に挿通してプローブ７を圧着した後、比誘電率
を測定して含水量を算出するだけで済むので、測定の度
に岩石コアを採取する必要のある従来法と比べて含水量
測定が簡便になる。しかも、既存のボーリング孔１５が
ある場合には、そのボーリング孔１５を利用して測定を
行うことができるため、含水量測定が一層簡便なものと
なる。また、ボーリング孔１５に対するパッカー部３の
挿通深さを変えることにより、岩盤１３の任意の深度位
置における含水量を定量的に把握することが可能とな
る。さらに、パッカー部３をボーリング孔１５に設置し
たまま任意の時間間隔で測定を行うことにより、岩盤１
３の含水量の経時変化を把握することもできる。その
上、岩盤の含水量測定装置１はその設置と撤去が容易で
あり、１台で反復して複数箇所の測定を行えるので、経
済性にも優れる。なお、プローブ７は円周方向に貼設さ
れているので、岩盤１３表面からの深度方向に対する測
定分解能に優れる。As described above, to check the water content of the rock 13, the packer 3 of the rock water content measuring device 1 is inserted into the boring hole 15, the probe 7 is pressed, and the relative permittivity is measured. Since it is only necessary to calculate the water content, the measurement of the water content is simpler than in the conventional method in which a rock core needs to be collected each time the measurement is performed. In addition, when there is an existing boring hole 15, the measurement can be performed using the boring hole 15, so that the water content measurement is further simplified. Further, by changing the insertion depth of the packer portion 3 into the boring hole 15, it is possible to quantitatively grasp the water content at an arbitrary depth position of the rock 13. Further, by performing measurements at arbitrary time intervals while the packer unit 3 is installed in the boring hole 15, the rock 1
The change with time of the water content of No. 3 can also be grasped. In addition, the rock water content measuring device 1 can be easily installed and removed, and can be repeatedly measured by a single device at a plurality of locations, so that it is economically excellent. Since the probe 7 is attached in the circumferential direction, the probe 7 has excellent measurement resolution in the depth direction from the surface of the rock 13.
【００２１】次に、図４、図５に基づいて第２の実施形
態を説明する。Next, a second embodiment will be described with reference to FIGS.
【００２２】図４は本発明に係る岩盤の含水量測定装置
の第２の実施形態を示す詳細断面図、図５は図４に示す
岩盤の含水量測定装置のＢ−Ｂ線による拡大断面図であ
る。FIG. 4 is a detailed sectional view showing a second embodiment of the rock water content measuring apparatus according to the present invention, and FIG. 5 is an enlarged cross-sectional view of the rock water content measuring apparatus shown in FIG. It is.
【００２３】この岩盤の含水量測定装置１では、プロー
ブ７の貼設方向を円周方向から孔軸方向に変えたこと以
外は、上述した第１の実施形態と同様である。したがっ
て、第１の実施形態と同じく、含水量測定が簡便で、岩
盤１３の任意の深度位置における含水量が定量的に把握
でき、岩盤１３の含水量の経時変化が把握できることに
加えて、プローブ７が孔軸方向に貼設されているので、
円周方向のプローブ７と比べて測定値の信頼性が高いと
いう利点がある。The apparatus 1 for measuring the water content of a rock mass is the same as the first embodiment described above, except that the direction in which the probe 7 is attached is changed from the circumferential direction to the hole axis direction. Therefore, similarly to the first embodiment, the water content measurement is simple, the water content at an arbitrary depth position of the rock 13 can be quantitatively grasped, and the change with time of the water content of the rock 13 can be grasped. Since 7 is stuck in the hole axis direction,
There is an advantage that the reliability of the measured value is higher than that of the probe 7 in the circumferential direction.
【００２４】なお、上述した第１および第２の実施形態
においては、パイプ２に１個のパッカー部３を装着した
岩盤の含水量測定装置１について説明したが、パッカー
部３の個数は１個に限られるわけではなく、複数個のパ
ッカー部３をパイプ２に装着することもできる。In the above-described first and second embodiments, the rock moisture content measuring apparatus 1 in which one packer unit 3 is mounted on the pipe 2 has been described, but the number of the packer units 3 is one. However, the present invention is not limited to this, and a plurality of packers 3 can be mounted on the pipe 2.
【００２５】また、上述した第１および第２の実施形態
においては、TDR（Time Domain Reflectometry）法によ
る計測手段１０を備えた岩盤の含水量測定装置１につい
て説明したが、計測手段１０の種類はこれに限定され
ず、例えばFDR（Frequency Domain Reflectometry）法
やADR（Amplitude Domain Reflectometry）法による計
測手段１０を採用しても構わない。Further, in the first and second embodiments described above, the rock moisture content measuring apparatus 1 provided with the measuring means 10 by the TDR (Time Domain Reflectometry) method has been described. However, the present invention is not limited to this. For example, the measuring means 10 using the FDR (Frequency Domain Reflectometry) method or the ADR (Amplitude Domain Reflectometry) method may be employed.
【００２６】さらに、上述した第１および第２の実施形
態においては、岩盤１３の比誘電率から含水量を求める
ときに、別途求められた含水量と比誘電率との対応関係
に基づいて算出したが、含水量と比誘電率との間の一般
的な関係式（例えば、数１に示す３相アルファミキシン
グモデルによる関係式、数２に示すToppの関係式など）
が適用できる範囲内であれば、その関係式を用いて比誘
電率から含水量を求めることも可能である。Further, in the first and second embodiments described above, when the water content is obtained from the relative permittivity of the bedrock 13, the water content is calculated based on the correspondence between the separately obtained water content and the relative permittivity. However, a general relational expression between the water content and the relative permittivity (for example, a relational expression based on a three-phase alpha mixing model shown in Expression 1, a Topp relational expression shown in Expression 2, etc.)
Is within the applicable range, the water content can be determined from the relative permittivity using the relational expression.
【数１】 ここで、Ka：比誘電率 θv：含水量 n：有効間隙率 Kair：空気の比誘電率(=1) Kwater：水の比誘電率(=81) Ksolid：岩石鉱物の比誘電率(=一般的に4〜7) α：形状係数(=経験的に0.5)(Equation 1) Where Ka: relative permittivity θv: water content n: effective porosity Kair: relative permittivity of air (= 1) Kwater: relative permittivity of water (= 81) Ksolid: relative permittivity of rock mineral (= general Α: Shape factor (= 0.5 empirically)
【数２】Ka=3.03+9.3θv+146θv2 -76.7θv3 ここで、Ka：比誘電率 θv：含水量Ka = 3.03 + 9.3θv + 146θv 2 -76.7θv 3 where Ka: relative permittivity θv: water content
【００２７】[0027]
【発明の効果】以上説明したように本発明によれば、先
端が閉塞されたパイプ２を有し、このパイプ２の先端近
傍に孔２ａを形成し、前記パイプ２の外周に前記孔２ａ
を覆う形で伸縮性スリーブ５を当該パイプ２の径方向に
膨張収縮自在に設け、この伸縮性スリーブ５の外周に緩
衝材６を設け、この緩衝材６の表面にプローブ７を貼設
し、このプローブ７に電磁波を流して岩盤１３の比誘電
率を計測する計測手段１０を設け、この計測手段１０に
よって計測された比誘電率に基づいて前記岩盤１３の含
水量を算出するようにして構成したので、岩盤１３の含
水量を調べるには、パイプ２の先端をボーリング孔１５
に挿通してプローブ７を圧着した後、比誘電率を測定し
て含水量を算出するだけで済むため、測定の度に岩石コ
アを採取する煩雑な作業が不要となることから、含水量
の測定を簡便化するとともに、同一箇所での含水量の経
時変化を見ることが可能な岩盤の含水量測定装置１を提
供することができる。その結果、岩盤１３において飽和
度の算出、飽和・不飽和の判定、飽和・不飽和領域境界
の把握などが実施可能となる。As described above, according to the present invention, the pipe 2 has a closed end, a hole 2a is formed near the end of the pipe 2, and the hole 2a is formed in the outer periphery of the pipe 2.
The elastic sleeve 5 is provided so as to expand and contract in the radial direction of the pipe 2 so as to cover the outer periphery of the pipe 2, the cushioning material 6 is provided on the outer periphery of the elastic sleeve 5, and the probe 7 is attached to the surface of the cushioning material 6 Measuring means 10 for measuring the relative permittivity of the rock 13 by flowing an electromagnetic wave to the probe 7 is provided, and the water content of the rock 13 is calculated based on the relative permittivity measured by the measuring means 10. Therefore, in order to check the water content of the rock 13, the tip of the pipe 2 was
After crimping the probe 7 by inserting it into the probe, it is only necessary to measure the relative permittivity and calculate the water content. Therefore, it is not necessary to perform a complicated operation of collecting a rock core every time the measurement is performed. It is possible to provide a rock mass water content measuring device 1 that simplifies the measurement and allows the change of the water content with time at the same location to be observed. As a result, calculation of saturation, determination of saturation / unsaturation, grasp of saturation / unsaturation region boundaries, etc. can be performed in the rock 13.
【図１】本発明に係る岩盤の含水量測定装置の第１の実
施形態を示す断面図である。FIG. 1 is a cross-sectional view showing a first embodiment of a rock water content measuring device according to the present invention.
【図２】図１に示す岩盤の含水量測定装置の要部を示す
詳細図である。FIG. 2 is a detailed view showing a main part of the rock mass moisture content measuring device shown in FIG.
【図３】図２に示す岩盤の含水量測定装置のＡ−Ａ線に
よる拡大断面図である。FIG. 3 is an enlarged sectional view taken along line AA of the apparatus for measuring water content of rock shown in FIG.
【図４】本発明に係る岩盤の含水量測定装置の第２の実
施形態を示す詳細断面図である。FIG. 4 is a detailed sectional view showing a second embodiment of the rock water content measuring device according to the present invention.
【図５】図４に示す岩盤の含水量測定装置のＢ−Ｂ線に
よる拡大断面図である。FIG. 5 is an enlarged sectional view taken along line BB of the apparatus for measuring the water content of the rock shown in FIG.
【符号の説明】 １……岩盤の含水量測定装置 ２……パイプ ２ａ……孔 ５……伸縮性スリーブ ６……緩衝材 ７……プローブ １０……計測手段 １３……岩盤 １５……ボーリング孔[Description of Signs] 1... Rock mass moisture content measuring device 2... Pipe 2a... Hole 5... Elastic sleeve 6... Hole
フロントページの続き (72)発明者 櫟原 昇 岐阜県土岐市泉町定林寺959−31 核燃 料サイクル開発機構 東濃地科学センタ ー内 (72)発明者 杉原 弘造 岐阜県土岐市泉町定林寺959−31 核燃 料サイクル開発機構 東濃地科学センタ ー内 (72)発明者 西田 薫 東京都豊島区池袋三丁目１番２号 株式 会社ダイヤコンサルタント内 (72)発明者 林 為人 東京都豊島区池袋三丁目１番２号 株式 会社ダイヤコンサルタント内 (72)発明者 安達 哲也 東京都新宿区西新宿一丁目25番１号 大 成建設株式会社内 (56)参考文献 特開 平10−90201（ＪＰ，Ａ) 特開 平10−142169（ＪＰ，Ａ) 特開 昭61−182569（ＪＰ，Ａ) 特開 昭63−148157（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 22/00 - 22/04 G01N 27/00 - 27/24 G01V 3/00 - 3/40 G01N 27/72 - 27/90 Continued on the front page (72) Inventor Noboru Ichihara 959-31 Izumicho Jorinji Temple, Toki City, Gifu Prefecture Nuclear Fuel Cycle Development Organization Tono Geoscience Center (72) Inventor Hirozo Sugihara 959-31 Izumicho Jorinji Temple, Toki City, Gifu Prefecture Within the Tono Geoscience Center, Japan Nuclear Cycle Development Institute (72) Inventor Kaoru Nishida 1-2-1, Ikebukuro, Toshima-ku, Tokyo Inside the diamond consultant (72) Inventor Tameto Hayashi 3-chome Ikebukuro, Toshima-ku, Tokyo No. 1-2 Inside Dia Consultant Co., Ltd. (72) Inventor Tetsuya Adachi Inside Taisei Corporation, 25-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo (56) References JP-A-10-90201 (JP, A) JP-A-10-142169 (JP, A) JP-A-61-182569 (JP, A) JP-A-63-148157 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) G01N 22/00-22/04 G01N 27/00-27/24 G01V 3/00-3/40 G01N 27/72-27/90
Claims (1)
（５）を当該パイプの径方向に膨張収縮自在に設け、 この伸縮性スリーブの外周に緩衝材（６）を設け、 この緩衝材の表面にプローブ（７）を貼設し、 このプローブに電磁波を流して岩盤（１３）の比誘電率
を計測する計測手段（１０）を設け、 この計測手段によって計測された比誘電率に基づいて前
記岩盤の含水量を算出することを特徴とする岩盤の含水
量測定装置。1. A pipe (2) having a closed end, a hole (2a) is formed near the end of the pipe, and an elastic sleeve (5) is formed on the outer periphery of the pipe so as to cover the hole. The pipe is provided so as to be able to expand and contract in the radial direction, a cushioning material (6) is provided on the outer periphery of the elastic sleeve, a probe (7) is attached to the surface of the cushioning material, and an electromagnetic wave is caused to flow through the probe to the bedrock. (13) A measuring device (10) for measuring a relative dielectric constant, wherein the water content of the rock is calculated based on the relative dielectric constant measured by the measuring device. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19171199A JP3263381B2 (en) | 1999-07-06 | 1999-07-06 | Bedrock moisture content measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19171199A JP3263381B2 (en) | 1999-07-06 | 1999-07-06 | Bedrock moisture content measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001021504A JP2001021504A (en) | 2001-01-26 |
| JP3263381B2 true JP3263381B2 (en) | 2002-03-04 |
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ID=16279217
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19171199A Expired - Fee Related JP3263381B2 (en) | 1999-07-06 | 1999-07-06 | Bedrock moisture content measuring device |
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| Country | Link |
|---|---|
| JP (1) | JP3263381B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005227199A (en) * | 2004-02-16 | 2005-08-25 | Central Res Inst Of Electric Power Ind | Method for measuring concentration of boron and measuring instrument therefor |
| JP4864580B2 (en) * | 2006-07-21 | 2012-02-01 | 財団法人電力中央研究所 | Ground monitoring method and apparatus |
| US10884128B2 (en) | 2015-03-24 | 2021-01-05 | Utilis Israel Ltd. | System and method of underground water detection |
| US9945942B2 (en) * | 2015-03-24 | 2018-04-17 | Utilis Israel Ltd. | System and method of underground water detection |
| KR101858146B1 (en) * | 2017-09-28 | 2018-05-15 | 한국원자력환경공단 | A experimental apparatus and experimental method for radionuclide migration prediction under unsaturated condition |
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1999
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| Publication number | Publication date |
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| JP2001021504A (en) | 2001-01-26 |
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