JPH0538123Y2 - - Google Patents
Info
- Publication number
- JPH0538123Y2 JPH0538123Y2 JP10559787U JP10559787U JPH0538123Y2 JP H0538123 Y2 JPH0538123 Y2 JP H0538123Y2 JP 10559787 U JP10559787 U JP 10559787U JP 10559787 U JP10559787 U JP 10559787U JP H0538123 Y2 JPH0538123 Y2 JP H0538123Y2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- fixing frame
- electrodes
- selection switch
- handle
- 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 - Lifetime
Links
- 239000002689 soil Substances 0.000 claims description 16
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 238000011835 investigation Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 description 22
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- 230000001066 destructive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は、堤防のような土構造物の表層部の土
質状況を簡便・迅速に調査可能な電気探査方式の
電極装置に関し、更に詳しくは、電極固定フレー
ムに間隔をおいて３個以上の電極を突設すると共
に取つ手部を設け、選択スイツチ部の切り換え動
作により任意の電極を選択可能とした表層土質調
査用の電極装置に関するものである。[Detailed description of the invention] [Field of industrial application] The present invention relates to an electrode device for electrical exploration that can easily and quickly investigate the soil condition of the surface layer of earth structures such as embankments. , relating to an electrode device for surface soil investigation, in which three or more electrodes are protruded from an electrode fixing frame at intervals, and a handle is provided, and any electrode can be selected by switching the selection switch part. It is.
［従来の技術］
河川堤防や海岸堤防等のような土構造物におい
ては、表層部の土質状況が全体の安定に大きな影
響を与えることが多い。そのため表層の土質状況
を簡便・迅速に調査することは、特に堤防のよう
な長大な土構造物の調査では是非とも必要なこと
である。[Prior Art] In earth structures such as river embankments and coastal embankments, the soil condition of the surface layer often has a great influence on the overall stability. Therefore, it is absolutely necessary to investigate the soil condition of the surface layer easily and quickly, especially when investigating long earth structures such as embankments.
従来技術ではこのような調査の場合、多くの地
点においてボーリングや壺掘りを行つてサンプル
を採取し、土質の確認を行つている。 In conventional technology, such surveys involve collecting samples by boring or digging pots at many locations and confirming the soil quality.
［考案が解決しようとする問題点］
しかしこのようなボーリングや壺掘りは、多大
な労力と費用を要するうえ、測定点のみのデータ
しか得られない問題がある。また特に調査対象が
堤防のような場合には、それに穴を開ける調査法
は将来の洪水時等で障害となる可能性も大きく、
後処理に非常に注意深い作業が必要となる。[Problems that the invention aims to solve] However, such boring and pot digging requires a great deal of labor and expense, and there is a problem in that data can only be obtained from measurement points. In addition, especially when the survey target is an embankment, the method of drilling a hole in it has a high possibility of becoming an obstacle in the event of a future flood.
Very careful post-processing is required.
ところで地下の状態を調べる方法の一つに、地
層の電気的性質の違いを利用する電気探査法があ
る。電気探査法には、電極配置の型によつて種々
あるが、何れにしても数十メートルないし数百メ
ートル離れた点に点電極を打ち込み、電流を流し
その時の電位差を測定し、一回の測定が終了する
と次の測定位置に電極を移し変え測定を繰り返す
ものであり、電極間隔を変化させてその時々の見
掛け比抵抗を求め地層を解析する方法である。こ
のため従来技術では、まず電極を打ち込み、測定
後それを引抜き別の個所に移動して打ち込む作業
を測定回数だけ繰り返さなければならない。電極
間の距離が探査深度に相当するから、きめ細かく
探査深度を変えて測定しようとする場合は測定回
数が多くなり、電極の引抜き、打ち込み位置の決
定、電極の打ち込みの回数が極めて多くなり、時
間と労力がかかりすぎ実質的には測定が困難とな
る。 By the way, one method of investigating underground conditions is electrical exploration, which utilizes differences in the electrical properties of strata. There are various electrical exploration methods depending on the type of electrode arrangement, but in any case, a point electrode is implanted at a point several tens to hundreds of meters away, a current is applied, and the potential difference at that time is measured. When the measurement is completed, the electrode is moved to the next measurement position and the measurement is repeated.This method analyzes the stratum by changing the electrode spacing and determining the apparent resistivity at each time. For this reason, in the prior art, it is necessary to first implant an electrode, then pull it out after measurement, move it to another location, and repeat the process for the number of measurements. Since the distance between the electrodes corresponds to the exploration depth, if you try to make measurements by changing the exploration depth finely, the number of measurements will increase, and the number of times you will have to pull out the electrode, determine the implantation position, and implant the electrode will become extremely large, which will save time. This requires too much effort and is practically difficult to measure.
本考案の目的は、上記のような従来技術の欠点
を解消し、殆ど非破壊的にしかも点ではなく線
（断面）での調査が可能であり、簡便且つ迅速に
表層の土質状況を調査できるように工夫した電気
探査方式による表層土質調査用の電極装置を提供
することにある。 The purpose of the present invention is to eliminate the above-mentioned drawbacks of the conventional technology, and to enable investigation almost non-destructively and by a line (cross section) rather than a point, making it possible to investigate the soil condition of the surface layer easily and quickly. An object of the present invention is to provide an electrode device for surface soil investigation using an electric exploration method devised as described above.
［問題点を解決するための手段］
上記のような目的を達成することのできる本考
案は、３個以上の電極を、電極固定フレームに間
隔において且つ互いに絶縁した状態で突設すると
共に、該電極固定フレームに取つ手部を設け、前
記電極と導通するリード線を選択スイツチ部に導
き、該選択スイツチ部の切り換え動作により電極
選択を可能とした電気探査方式による表層土質調
査用の電極装置である。[Means for Solving the Problems] The present invention, which can achieve the above objects, includes protruding three or more electrodes from an electrode fixing frame at intervals and insulated from each other. An electrode device for surface soil investigation using an electric exploration method, in which a handle is provided on an electrode fixing frame, a lead wire that conducts with the electrode is led to a selection switch, and the electrode can be selected by switching the selection switch. It is.
特に限定されるものではないが、好ましい実施
態様としては、２メートル程度の棒状の電極固定
フレームに６本程度の電極を均等間隔で貫通固定
し、その電極固定フレームに作業者が取り扱い易
く且つ電極を地表に挿入し易くするため腰の高さ
程度の取つ手部を取り付け、その取つ手部に選択
スイツチ部等を固定する構造がある。 Although not particularly limited, in a preferred embodiment, about 6 electrodes are penetrated and fixed at equal intervals to a rod-shaped electrode fixing frame of about 2 meters in length, and the electrodes are easily handled by the worker and fixed to the electrode fixing frame. In order to make it easier to insert into the ground, there is a structure in which a handle part about waist height is attached, and a selection switch part etc. is fixed to the handle part.
［作用］
電極固定フレームには３個以上の電極が突設固
定され、且つ取つ手部が取り付けられているの
で、該取つ手部を利用して運搬し所定の位置で電
極の先端を地面表層に押し込むことにより各電極
が地中に貫入し接触する。そして選択スイツチ部
の切り換え動作で電極選択を行う。[Function] Three or more electrodes are protrudingly fixed to the electrode fixing frame, and a handle is attached to the frame, so the handle can be used to carry the electrode and hold the tip of the electrode at a predetermined position. By pushing into the ground surface, each electrode penetrates into the ground and comes into contact with it. Then, electrode selection is performed by switching the selection switch section.
従つて１回の電極固定フレームの移動と設置に
よつて多数点の測定を順次行うことができ、しか
もそれら多数個の電極は所定の間隔で配列されて
いるため相互の距離を測定する必要がなく、極め
て迅速且つ容易に電気探査方式での測定が可能と
なる。 Therefore, it is possible to sequentially measure multiple points by moving and installing the electrode fixing frame once, and since the multiple electrodes are arranged at predetermined intervals, there is no need to measure mutual distances. This makes it possible to perform measurements using the electric survey method extremely quickly and easily.
取つ手部を作業者の腰の位置程度の高さとし、
それに選択スイツチ部や計測器等を取り付けてお
けば、移動も容易であるばかりでなく各電極の地
中への圧入作業も簡単に行えるし、選択スイツチ
部の切り換え動作もスムーズに行うことができ、
しかも測定データを見ながら次の測定作業を実施
できる。 The handle should be at the height of the worker's waist,
If you attach a selection switch and a measuring device to it, it will not only be easy to move, but it will also be easy to press-fit each electrode into the ground, and the selection switch can be switched smoothly. ,
What's more, you can perform the next measurement task while looking at the measurement data.
電極固定フレームに取り付けられている各電極
について測定データを採取した後、次の測定地点
に移動し、再び同じような操作を繰り返すことに
よつて、堤防のような長大な土構造物であつても
少人数の作業者で迅速に調査が完了する。 After collecting measurement data for each electrode attached to the electrode fixing frame, move to the next measurement point and repeat the same operation again. Investigations can also be completed quickly with a small number of workers.
このようにして得られた比抵抗測定値から、表
層土質を断面のチヤートにして把握でき、非破壊
的な調査を実施できる。 From the resistivity measurements obtained in this way, the surface soil quality can be understood as a cross-sectional chart, and non-destructive investigations can be conducted.
［実施例］
第１図〜第４図は本考案に係る電極装置の好ま
しい一実施例を示すものである。[Embodiment] FIGS. 1 to 4 show a preferred embodiment of the electrode device according to the present invention.
まず第１図に示すように本考案に係る表層土質
調査用の電極装置は、電極固定フレーム１０と、
それに貫設固定される３本以上（この実施例では
６本）の電極１２と、前記電極固定フレーム１０
上に取り付けられる取つ手部１４と、前記電極１
２と導通するリード線１６と、それらリード線１
６に接続される選択スイツチ部１８を有する構造
である。 First, as shown in FIG. 1, the electrode device for surface soil investigation according to the present invention includes an electrode fixing frame 10,
Three or more (six in this embodiment) electrodes 12 are fixed through the electrode fixing frame 10.
a handle portion 14 attached on top of the electrode 1;
2, and those lead wires 1
This structure has a selection switch section 18 connected to 6.
ここで電極固定フレーム１０は、例えば合成樹
脂や木材等の電気絶縁体からなる断面角形の棒状
体であり、その上面にリード線挿通用の溝２０が
長手方向に形成されている。この電極固定フレー
ム１０は、持ち運び容易なように長さ2m程度若
しくはそれ以下の寸法とするのが望ましい。そし
てこの電極固定フレーム１０には、例えば10cm程
度の間隔で上下方向に多数の貫通孔が形成されて
おり、その各貫通孔には金属製で内面に雌ネジ部
を形成したスリーブ２２が嵌着され、それら各ス
リーブ２２に前記リード線１６の一端がそれぞれ
接続される。 Here, the electrode fixing frame 10 is a rod-shaped body with a square cross section made of an electrical insulator such as synthetic resin or wood, and has a groove 20 for inserting a lead wire formed in its upper surface in the longitudinal direction. This electrode fixing frame 10 is desirably about 2 meters long or less so that it can be easily carried. The electrode fixing frame 10 has a large number of through holes formed in the vertical direction at intervals of, for example, about 10 cm, and each of the through holes is fitted with a sleeve 22 made of metal and having a female threaded portion formed on the inner surface. One end of the lead wire 16 is connected to each sleeve 22.
電極１２は、地中２８に容易に貫入するように
先細状で、外周部に雄ネジを形成した構造であ
り、前記金属製スリーブ２２の雌ネジ部と螺合
し、上部からナツト２４で締め付けることで下方
に突出するように固定できる構造である（第４図
参照）。 The electrode 12 has a tapered shape so as to easily penetrate underground 28, and has a male threaded structure on its outer periphery.The electrode 12 is screwed into the female threaded part of the metal sleeve 22 and tightened from above with a nut 24. It has a structure that allows it to be fixed so that it protrudes downward (see Figure 4).
従つて各電極１２を所定間隔で、例えば20cm毎
あるいは50cm毎などの間隔で、あるいはそれ以外
の間隔でも自由に配置できる。勿論、予め全部の
スリーブ２２に電極を取り付けておいてもよい
が、そうすると重量が増加するので、このように
必要な個所だけに取り付けられるような構成は非
常に好ましい。 Therefore, the electrodes 12 can be freely arranged at predetermined intervals, such as every 20 cm or 50 cm, or at other intervals. Of course, electrodes may be attached to all the sleeves 22 in advance, but this would increase the weight, so a configuration in which electrodes can be attached only to the necessary locations is highly preferable.
この実施例では取つ手１４は逆Ｕ字型をなし、
その高さはほぼ作業者の腰の高さぐらいである。
勿論Ｔ字型や逆Ｌ字型など他の形状であつてもよ
い。各リード線１６は束ねられてその取つ手部１
４の支柱部に沿つて導かれ、取つ手部１４の上部
に固定した選択スイツチ部１８に接続される。こ
の選択スイツチ部１８は測定器に接続されること
になる。測定器が非常に小型である場合には、選
択スイツチ部１８と同様にその取つ手部１４の上
部に取り付けると、測定結果を見ながら作業を行
なえるため、電極の接触不良などによる測定デー
タの不備なども随時チエツクでき能率も向上し特
に好ましい。 In this embodiment, the handle 14 has an inverted U shape,
Its height is approximately the height of the worker's waist.
Of course, other shapes such as a T-shape or an inverted L-shape may also be used. Each lead wire 16 is bundled and the handle 1
4, and is connected to a selection switch section 18 fixed to the upper part of the handle section 14. This selection switch section 18 will be connected to a measuring instrument. If the measuring device is very small, attaching it to the top of the handle section 14 in the same way as the selection switch section 18 allows you to work while viewing the measurement results, so that measurement data due to poor electrode contact etc. This is especially preferable because it allows you to check for deficiencies at any time and improves efficiency.
このように構成した電極装置を用いた表層土質
調査は、例えば２極法で測定する場合、次のよう
にして行う。第５図に示すように、この電極装置
とは別に二つの遠電極Ｐ，Ｃを予め遠く離れた所
定の位置に埋設する。そしてそれらと測定器３４
とを接続する。遠電極Ｐ，Ｃは測定の期間中、一
定の位置に固定したままである。それに対して本
電極装置３６は、全電極についての測定が完了す
る毎に移動させ各電極を地表面に突き刺す。地面
との接触が不十分な場合には、その個所に水を撒
くことも有効である。電極C1，P1，……P5が電
極固定フレーム１０に一体化されている。そして
遠電極Ｃと電極C1間に電流を流し、その時のＰ
−P1，Ｐ−P2，……Ｐ−P5間の電位差をそれぞ
れ選択スイツチ部１８を切り換えて測定器３４に
より測定する。それら測定値によつて比抵抗を求
め、表層土質のチヤートを作成する。 A surface soil investigation using the electrode device configured as described above is carried out as follows when measuring, for example, by the two-electrode method. As shown in FIG. 5, two far electrodes P and C are buried in advance at predetermined positions far apart from this electrode device. And those and the measuring device 34
Connect with. The far electrodes P, C remain fixed in a fixed position during the measurement. On the other hand, the present electrode device 36 is moved and pierces each electrode into the ground surface every time the measurement of all electrodes is completed. If there is insufficient contact with the ground, it is also effective to sprinkle water on the area. Electrodes C 1 , P 1 , . . . P 5 are integrated into the electrode fixing frame 10 . Then, a current is passed between the far electrode C and the electrode C1 , and then P
-P1 , P- P2 , . . . P- P5 are measured by the measuring device 34 by switching the selection switch section 18, respectively. Based on these measured values, determine the specific resistance and create a chart of the surface soil quality.
従つて本実施例では取つ手部１４を持つて電極
装置全体を測定個所に運び全電極を一度に地面に
突き刺すことができ、選択スイツチ部１８の切り
換え動作のみで５深度分の測定が完了する。 Therefore, in this embodiment, it is possible to carry the entire electrode device to the measurement location by holding the handle 14 and pierce all the electrodes into the ground at once, and the measurement for 5 depths can be completed by simply switching the selection switch 18. do.
以上本考案の好ましい一実施例について詳述し
たが、本考案はこのような構成のみに限定される
ものではない。普通の自動車で運搬する時の便宜
を考えると、取つ手部を電極固定フレームに対し
て取り外し自在の構造とし、また電極固定フレー
ムも中央付近で二つ折りもしくは二分割可能な構
造にするのが望ましい。これらはネジ込み式ある
いは嵌め合わせ式等の構造で簡単に実現できる。 Although a preferred embodiment of the present invention has been described above in detail, the present invention is not limited to only such a configuration. Considering convenience when transporting in a normal car, it is recommended to have a structure in which the handle part can be detached from the electrode fixing frame, and the electrode fixing frame can also be folded or split into two near the center. desirable. These can be easily realized with a structure such as a screw-in type or a fitting type.
電極固定フレームは前記のように木材もしくは
プラスチツク等の軽量絶縁体で製作するのが望ま
しいが、勿論アルミニウム等の金属で構成しても
よい。但しその場合には各電極相互を電気的に絶
縁する必要がある。またその断面形状も特に角形
に限られる訳ではなく、任意の断面形状であつて
よい。本実施例では上面に溝を形成し、それにリ
ード線を埋設している。このような構造にする
と、作業中に誤つてリード線を何かに引つ掛け切
断するといつた事故を防止でき好ましい。勿論、
電極固定フレームを中空構造とし、その中にリー
ド線を挿通するような構成としてもよい。 As mentioned above, the electrode fixing frame is preferably made of a lightweight insulator such as wood or plastic, but it may of course be made of metal such as aluminum. However, in that case, it is necessary to electrically insulate each electrode from each other. Further, the cross-sectional shape is not particularly limited to a rectangular shape, and may be any cross-sectional shape. In this embodiment, a groove is formed on the upper surface, and a lead wire is buried in the groove. This structure is preferable because it can prevent accidents such as accidental hooking of the lead wire on something and cutting it during work. Of course,
The electrode fixing frame may have a hollow structure, and the lead wire may be inserted through the hollow structure.
各電極は地表面の多少の凹凸にも対応できるよ
うに、本実施例で示す如く突出量を調整できる構
造とするのが望ましい。これにはネジ込み式の
他、バネによつて常に下向きに押し出しておい
て、ある程度以上の力が掛かれば引つ込むような
方式や、伸縮可能な方式等であつもよい。特に本
実施例のようにネジ込み着脱式にした場合には、
金属製のスリーブを用い、それにリード線を接続
してネジ部での接触によつて電極とリード線とを
導通させるようにすれば、電極の着脱操作が容易
となる。 It is desirable that each electrode has a structure in which the amount of protrusion can be adjusted, as shown in this embodiment, so that it can cope with some irregularities on the ground surface. In addition to a screw-in type, this may be of a type in which it is always pushed downward by a spring and retracted when a certain amount of force is applied, or a type in which it can be expanded and contracted. Especially when using a screw-on/removable type as in this example,
If a metal sleeve is used, a lead wire is connected to the sleeve, and the electrode and the lead wire are electrically connected through contact at the threaded portion, the electrode can be easily attached and detached.
［考案の効果］
本考案は上記のように３個以上の電極を電極固
定フレームに間隔をおいて突設固定すると共に取
つ手部を設け、選択スイツチ部の切り換え動作に
より電極選択を可能にした構造だから、表層土質
の電気探査のための電極の設定と移動、測定を効
率よく行なえる効果がある。[Effects of the invention] As described above, the present invention projects and fixes three or more electrodes at intervals on the electrode fixing frame, and also provides a handle to handle them, making it possible to select electrodes by switching the selection switch part. This structure makes it possible to efficiently set up, move, and measure electrodes for electrical exploration of surface soil.
従つて本考案は、特に堤防のような長大な土構
造物の表層土質調査を非破壊でしかも断面で調査
が可能となり、多数の測定点での測定を簡単なス
イツチ操作で行えるため僅かな人数の作業者で迅
速且つ容易に実施できる甚だ優れた効果を有する
ものである。 Therefore, this invention makes it possible to conduct non-destructive and cross-sectional surveys of the surface soil of long earthen structures such as embankments, and requires only a small number of people because measurements can be made at a large number of measurement points with a simple switch operation. This method can be performed quickly and easily by any number of workers, and has excellent effects.
第１図は本考案に係る表層土質調査用の電極装
置の一実施例を示す説明図、第２図はその電極固
定フレームの断面図、第３図はその部分平面図、
第４図は電極を取り付けた状態を示す部分断面
図、第５図は測定システムの全体を表す説明図で
ある。
１０……電極固定フレーム、１２……電極、１
４……取つ手部、１６……リード線、１８……選
択スイツチ部。
FIG. 1 is an explanatory diagram showing an embodiment of the electrode device for surface soil investigation according to the present invention, FIG. 2 is a sectional view of its electrode fixing frame, and FIG. 3 is a partial plan view thereof.
FIG. 4 is a partial sectional view showing the state in which the electrodes are attached, and FIG. 5 is an explanatory view showing the entire measuring system. 10... Electrode fixing frame, 12... Electrode, 1
4...handle part, 16...lead wire, 18...selection switch part.
Claims (1)
おいて且つ互いに絶縁した状態で突設すると共
に、該電極固定フレームに取つ手部を設け、前記
電極と導通するリード線を選択スイツチ部に導
き、該選択スイツチ部の切り換え動作により電極
選択を可能とした電気探査方式による表層土質調
査用の電極装置。 Three or more electrodes are provided protruding from an electrode fixing frame at intervals and insulated from each other, a handle is provided on the electrode fixing frame, and a lead wire electrically connected to the electrode is connected to a selection switch section. An electrode device for surface soil investigation using an electrical exploration method, which enables electrode selection by switching the selection switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10559787U JPH0538123Y2 (en) | 1987-07-09 | 1987-07-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10559787U JPH0538123Y2 (en) | 1987-07-09 | 1987-07-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6410538U JPS6410538U (en) | 1989-01-20 |
| JPH0538123Y2 true JPH0538123Y2 (en) | 1993-09-27 |
Family
ID=31338353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10559787U Expired - Lifetime JPH0538123Y2 (en) | 1987-07-09 | 1987-07-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0538123Y2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2554969B2 (en) * | 1991-12-09 | 1996-11-20 | 強化土エンジニヤリング株式会社 | Soil investigation method and device |
| JP4644810B2 (en) * | 2005-10-14 | 2011-03-09 | 国立大学法人九州大学 | Underground object exploration device and underground object exploration method |
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- 1987-07-09 JP JP10559787U patent/JPH0538123Y2/ja not_active Expired - Lifetime
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Also Published As
| Publication number | Publication date |
|---|---|
| JPS6410538U (en) | 1989-01-20 |
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