JPH01271512A - Method and device for water permeation test for crack monitor - Google Patents
Method and device for water permeation test for crack monitorInfo
- Publication number
- JPH01271512A JPH01271512A JP9976688A JP9976688A JPH01271512A JP H01271512 A JPH01271512 A JP H01271512A JP 9976688 A JP9976688 A JP 9976688A JP 9976688 A JP9976688 A JP 9976688A JP H01271512 A JPH01271512 A JP H01271512A
- Authority
- JP
- Japan
- Prior art keywords
- water
- packer
- camera
- cracks
- pressure
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims description 12
- 238000012360 testing method Methods 0.000 title abstract description 9
- 239000011435 rock Substances 0.000 claims description 10
- 238000011041 water permeability test Methods 0.000 claims description 9
- 238000011065 in-situ storage Methods 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 4
- 230000035699 permeability Effects 0.000 abstract description 10
- 230000003028 elevating effect Effects 0.000 abstract description 3
- 238000011156 evaluation Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野ン
本発明は、岩盤内の孔井を用いて行うき裂モニター透水
試験方法及びその装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a crack monitor water permeability test method and an apparatus therefor, which are carried out using a borehole in a bedrock.
〈従来の技術〉
岩盤の透水試験や岩盤内の既存き裂の評価は、地下のト
ンネル等構造物の設計や安定性評価の基礎データとなる
ものであるが、従来は透水試験と亀裂評価とは別々の装
置で個々独立して行われていた。すなわち実際の岩盤内
の孔井の一部をパッカーにより閉鎖し、この部分に水圧
をかけ、漏水量を測定する原位置透水試験を行ったのち
、今度は孔井内にボアポールテレビを挿入して無負荷の
ときの孔壁面に存在する微小亀裂をモニターするとか、
インプレッションパ・ツカ−による孔井壁面の型取りと
いった亀裂評価法が採られてきた。<Conventional technology> The permeability test of the bedrock and the evaluation of existing cracks in the bedrock provide basic data for the design and stability evaluation of structures such as underground tunnels. were performed independently using separate devices. In other words, a part of the borehole in the actual bedrock was closed with a packer, water pressure was applied to this part, and an in-situ water permeability test was conducted to measure the amount of water leakage, and then a Borepole TV was inserted into the borehole. Monitoring the microcracks that exist on the hole wall surface when no load is applied,
Crack evaluation methods have been adopted, such as making a mold of the well wall using an impression paper.
尚、パッカーのかけ方にはダブルパッカー法とシングル
パッカー法とがあり、前者は危初にポーリング孔を予定
した長さだけ掘り、試験を行いたい区間の上下端をパッ
カーにより閉鎖して加圧し、後者は試験区間の下端まで
ボーリングを行った後、上端にパッカーをかけて加圧し
、更にその下の試験を行うときはポーリングを行ったの
ち上端にパッカーをかけて加圧するといった具合に、ポ
ーリング作業と試験とを交互に繰り返した。There are two packer methods: double packer method and single packer method. In the former method, a poling hole is first dug to the planned length, and the upper and lower ends of the section to be tested are closed with packers and pressurized. In the latter case, after boring to the lower end of the test section, a packer is applied to the upper end to apply pressure, and when testing further below that, polling is performed, and then a packer is applied to the upper end to apply pressure. Work and testing were repeated alternately.
〈発明が解決しようとする課題〉
上記した透水試験による岩盤の透水性は加圧水を負荷し
た区間の平均値として評価されるものであって、岩盤の
透水を支配する個々の微小亀裂等の透水性を評価しなく
ても、それは甚だ困難であった。また孔井壁面上の既存
亀裂の分布は無負荷のときのインプレッシジンパッ力−
による孔井壁面の型取り又はボアホールテレビによる壁
面撮影によって行われるだけであり、加圧水が流入する
際のき裂挙動を知りたい場合には孔井内の微流速計測デ
ータから推測するに止どまっていた。<Problems to be Solved by the Invention> The permeability of the rock mass in the above-described permeability test is evaluated as the average value of the section where pressurized water is loaded, and the permeability of individual micro-cracks that control the permeability of the rock mass is evaluated. It would have been extremely difficult to do so without evaluating it. In addition, the distribution of existing cracks on the wellbore wall is determined by the impression force under no load.
However, if you want to know the crack behavior when pressurized water flows in, you can only estimate it from the microflow velocity measurement data inside the well. Ta.
本発明の目的は、岩盤内の微小き裂の透水性やその挙動
を評価する場合、従来は数種の実験が必要で、しかも透
水時におけるそれぞれのき裂の評価法には問題を残して
いた実情に鑑み、かかる欠点を解消することにある。The purpose of the present invention is that when evaluating the water permeability and behavior of microcracks in rock, conventionally several types of experiments are required, and furthermore, there remain problems in the evaluation method of each crack when water permeates. The objective is to eliminate such shortcomings in view of the actual situation.
く課題を解決するための手段〉
本発明になるき裂モニター透水試験方法は、原位置岩盤
の孔井の一部をパッカーによって仕切り、その仕切られ
た区間に水圧を負荷すると共に、水圧を負荷した前記仕
切区間内に配置したテレビカメラによって圧力水の流入
に伴い開口する孔壁面の亀裂を撮影するものであって、
これにより孔井内圧力下におけるき袋口挙動のモニター
が可能となって正しい評価が容易に得られることになる
。Means for Solving the Problems> The crack monitor water permeability test method of the present invention partitions a part of a well in an in-situ rock mass with a packer, applies water pressure to the partitioned section, and applies water pressure to the partitioned section. cracks in the hole wall surface that open with the inflow of pressurized water are photographed by a television camera placed in the partition section,
This makes it possible to monitor the behavior of the borehole mouth under pressure within the borehole, making it easier to obtain accurate evaluations.
また本発明になるき裂モニター透水試験装置は、原位置
岩盤の孔井内に水圧を負荷する区間を仕切るためのパッ
カーと、圧力水の流入に伴って開口する孔壁上の亀裂を
撮影するためのテレビカメラと、該テレビカメラによる
撮影の方位を検出する方位計と、該テレビカメラの回転
昇降装置とを装着したものである。In addition, the crack monitor water permeability test device of the present invention includes a packer for partitioning the section where water pressure is applied in the in-situ rock borehole, and a packer for photographing cracks on the borehole wall that open with the inflow of pressurized water. The device is equipped with a television camera, an azimuth meter for detecting the direction of photography by the television camera, and a rotating lifting device for the television camera.
〈実施例〉
説明の都合上、本発明になる亀裂モニター透水試験装置
について第１図に従って述べると、テレビカメラ５を内
装しなガラスＩ！Ｊ６の先端には方位計２と先端金具１
とが取り付き、ガラス＠６の後端にはテレビカメラ５の
回転制御部７が取り付いていて、回転制御部７に内装さ
れたモーターの回転によりガラス＠６内部の照明３、反
射鏡４、テレビカメラ５の共通の基台を回転可能として
いる。方位計２はテレビカメラ５による撮影の方位を検
出する０回転制御部７の後端には信号ケーブル１４を内
装しな芯杆８が接続され、芯杆８の中間部分にはパッカ
ー９および圧力センサー１１を内装した配管ボート１０
が取り付けられ、芯杆８の末端には信号ケーブルボート
１３が接続する。パッカー９と信号ケーブル・ボート１
３との間に配設した昇降装置１２は、孔井内に固定した
パッカー９に対してテレビカメラ５を上下方向に移動制
御できるようにするものである。テレビカメラ５が昇降
するときの信号ケーブル１５の緩みは信号ケーブルボー
ト１３上部に設けたスプリング式のケーブル伸縮装置に
よって調節するようになっている。配管ボート１１には
地上の加圧水装置と連絡されている加圧水配管１４がと
りついていて、パッカー９に加圧水を送って彫版させる
こと並びにパッカー９より前方個所から孔井内に加圧水
を送り込むことを可能としている。<Example> For convenience of explanation, the crack monitor water permeability test device according to the present invention will be described according to FIG. 1. Direction meter 2 and tip metal fitting 1 are installed at the tip of J6.
A rotation control unit 7 for a television camera 5 is attached to the rear end of the glass @6, and the rotation of the motor built into the rotation control unit 7 causes the lighting 3, reflector 4, and television inside the glass @6 to be rotated. The common base of the cameras 5 is rotatable. The direction meter 2 has a core rod 8 with a signal cable 14 connected to the rear end of the 0-rotation control section 7 that detects the direction of photography by the television camera 5, and a packer 9 and pressure Piping boat 10 equipped with sensor 11
is attached, and a signal cable boat 13 is connected to the end of the core rod 8. Packer 9 and signal cable boat 1
An elevating device 12 disposed between the TV camera 5 and the TV camera 3 allows the television camera 5 to be controlled to move vertically with respect to the packer 9 fixed in the borehole. The slackness of the signal cable 15 when the television camera 5 moves up and down is adjusted by a spring-type cable expansion/contraction device provided on the top of the signal cable boat 13. The piping boat 11 is equipped with a pressurized water pipe 14 connected to a pressurized water device on the ground, making it possible to send pressurized water to the packer 9 for engraving and to send pressurized water into the borehole from a location in front of the packer 9. There is.
テレビカメラ５による撮影が孔井壁面の円周方向に可能
ならば、それだけでよい場合には、第２図のように第１
図の昇降装置１２を省略することができ、この場合、配
管・信号ボート１６を介した配管ラインによって装置が
接続される。If it is possible to take pictures with the television camera 5 in the circumferential direction of the borehole wall, if that is all that is needed, the first
The lifting device 12 shown in the figure can be omitted, in which case the device is connected by a piping line via a piping and signal boat 16.
図示の例はシングルパッカー法によるものであってダブ
ルパッカー法によるものは図示するを省略しているが、
ダブルパヅ力−法によるものであってもよく、この場合
のテレビカメラ５は二つのパッカー間に配置される。The illustrated example is based on the single packer method, and the double packer method is omitted from illustration.
A double packer method may also be used, in which case the television camera 5 is placed between two packers.
上記した装置を孔井内の適宜位置まで降下させたのち、
加圧水配管１４からの送水によってパッカー９を膨張さ
せ礼拝壁面に圧着させることで装置の固定と透水試験の
ための水圧負荷区間の仕切りを行ない、同時にパッカー
９より先端の部分から孔井内に送水する。このような水
圧負荷下における礼拝壁面の状況は、テレビカメラ５の
回転制御部７を作動させることで孔井全周に互ってテレ
ビカメラ５で撮影が可能である。またテレビカメラ５の
昇降装置１２を設けているときは昇降可能な区間の範囲
で撮影が可能である。After lowering the above-mentioned device to an appropriate position within the borehole,
The packer 9 is expanded by water supplied from the pressurized water pipe 14 and pressed against the prayer wall to fix the device and partition the water pressure load section for the water permeability test, and at the same time, water is supplied from the tip of the packer 9 into the borehole. The condition of the prayer wall under such water pressure load can be photographed by the television camera 5 all around the well by operating the rotation control section 7 of the television camera 5. Moreover, when the elevating device 12 for the television camera 5 is provided, it is possible to take pictures within the range where the television camera 5 can be raised and lowered.
〈発明の効果〉
本発明の方法によれば、パッカーでシールされた圧力水
の負荷区間内で透水試験を行うときには同時にテレビカ
メラによって礼拝壁面のき裂がどのようになるかを逐一
撮影し、しかも撮影は孔井全周に亙って可能で、その方
位は方位計によって知ることができるから、微少亀裂等
の透水性と開口変化の正しい評価が容易となり、また原
位置岩盤における既存亀裂分布と岩盤の透水性との関係
を明らかにできて、き裂生長の程度に関する情報がたや
すく得られる。<Effects of the Invention> According to the method of the present invention, when conducting a water permeability test in a pressure water load section sealed by a packer, at the same time a television camera is used to photograph the appearance of cracks on the prayer wall, Moreover, since photography is possible all around the wellbore, and its orientation can be determined using a compass, it is easy to accurately evaluate the permeability and opening changes of micro-cracks, as well as the distribution of existing cracks in the in-situ rock. It is possible to clarify the relationship between the permeability of the rock and the permeability of the rock, and information on the degree of crack growth can be easily obtained.
本発明になる装置は小型化に適しているから、使用する
孔井径は小口径でよいため掘削コストひいては計測コス
トの低廉化に寄与でき、また従来できなかった小口径孔
井におけるき裂透水計測を可能にするといった適用範囲
の拡大が期待できる。そしてテレビカメラの回転・昇降
機能を具備させたことによって、孔井全周に亙るＶｊ１
２および一度の孔井内セットによる撮影範囲の拡大がで
き、その方位は方位計によって知ることができるから、
計測の簡略化に資するところ大なるものがある。Since the device of the present invention is suitable for miniaturization, the diameter of the well used can be small, contributing to lower drilling costs and measurement costs. It is expected that the scope of application will be expanded to enable measurement. By equipping the TV camera with rotating and lifting functions, Vj1 can be seen all around the hole.
2. You can expand the shooting range by setting the inside of the hole once, and the direction can be known with a compass.
There are many things that contribute to the simplification of measurement.
第１図は本発明の一実施例を示す説明図、第２図は本発
明の他の実施例を示す説明図である。
１・・・先端金具、２・・・方位計、３・・・照明、４
・・・反射鏡、５・・・テレビカメラ、６・・・ガラス
簡、７・・・回転制御部、８・・・芯杆、９・・・パッ
カー、１０・・・配管ボート、１１・・・圧力センサー
、１２・・・昇降装置、１３・・・信号ケーブルボート
、１４・・・加圧水配管、１５・・・信号ケーブル
同 荒木 友之助
１ 図FIG. 1 is an explanatory diagram showing one embodiment of the invention, and FIG. 2 is an explanatory diagram showing another embodiment of the invention. 1...Tip fitting, 2...Direction meter, 3...Lighting, 4
... Reflector, 5... Television camera, 6... Glass simple, 7... Rotation control unit, 8... Core rod, 9... Packer, 10... Piping boat, 11... ...Pressure sensor, 12... Lifting device, 13... Signal cable boat, 14... Pressurized water piping, 15... Signal cable Tomonosuke Araki 1 Figure
Claims (1)
、その仕切られた区間に水圧を負荷すると共に、孔井内
の耐圧容器中で回転および昇降するテレビによって圧力
水の流入に伴い開口する孔壁面の亀裂を撮影することを
特徴とするき裂モニター透水試験方法。 ２、原位置岩盤の孔井内に水圧を負荷する区間を仕切る
ためのパッカーと、圧力水の流入に伴って開口する孔壁
上の亀裂を撮影するためのテレビカメラと、該テレビカ
メラによる撮影の方位を検出する方位計と、該テレビカ
メラの回転昇降装置とを装着したことを特徴とするき裂
モニター透水試験装置。[Claims] 1. A part of the borehole in the in-situ rock mass is partitioned by a packer, water pressure is applied to the partitioned section, and pressure water is supplied by a TV that rotates and moves up and down in a pressure vessel inside the borehole. A crack monitor water permeability test method characterized by photographing cracks in the hole wall surface that open with inflow. 2. A packer to partition the section where water pressure is applied in the in-situ rock borehole, a television camera to photograph the cracks on the borehole wall that open with the inflow of pressurized water, and a camera for photographing by the television camera. A crack monitor water permeability test device, characterized in that it is equipped with an azimuth meter that detects the direction, and a rotating lifting device for the television camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63099766A JP2571259B2 (en) | 1988-04-22 | 1988-04-22 | Crack monitor permeability test method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63099766A JP2571259B2 (en) | 1988-04-22 | 1988-04-22 | Crack monitor permeability test method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01271512A true JPH01271512A (en) | 1989-10-30 |
| JP2571259B2 JP2571259B2 (en) | 1997-01-16 |
Family
ID=14256095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63099766A Expired - Lifetime JP2571259B2 (en) | 1988-04-22 | 1988-04-22 | Crack monitor permeability test method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2571259B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010047938A (en) * | 2008-08-20 | 2010-03-04 | Kansai Electric Power Co Inc:The | Method and system for evaluating ground |
| CN103410134A (en) * | 2013-07-09 | 2013-11-27 | 东南大学 | Conical probe for ocean under-consolidated soil pore water pressure testing |
| CN105908691A (en) * | 2016-06-14 | 2016-08-31 | 上海宏信设备工程有限公司 | Method and system for monitoring horizontal deformation of foundation pit in real time |
| CN109030225A (en) * | 2018-06-29 | 2018-12-18 | 中国电建集团中南勘测设计研究院有限公司 | A kind of equipment for observing Rockmass fractures in the test of hydraulic fracturing crustal stress in real time |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4106156B2 (en) | 1999-07-07 | 2008-06-25 | 理想科学工業株式会社 | Stencil printing machine |
-
1988
- 1988-04-22 JP JP63099766A patent/JP2571259B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010047938A (en) * | 2008-08-20 | 2010-03-04 | Kansai Electric Power Co Inc:The | Method and system for evaluating ground |
| CN103410134A (en) * | 2013-07-09 | 2013-11-27 | 东南大学 | Conical probe for ocean under-consolidated soil pore water pressure testing |
| CN105908691A (en) * | 2016-06-14 | 2016-08-31 | 上海宏信设备工程有限公司 | Method and system for monitoring horizontal deformation of foundation pit in real time |
| CN105908691B (en) * | 2016-06-14 | 2018-10-02 | 上海宏信设备工程有限公司 | A kind of method and system of real-time monitoring foundation pit horizontal distortion |
| CN109030225A (en) * | 2018-06-29 | 2018-12-18 | 中国电建集团中南勘测设计研究院有限公司 | A kind of equipment for observing Rockmass fractures in the test of hydraulic fracturing crustal stress in real time |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2571259B2 (en) | 1997-01-16 |
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