JPH09203646A - Apparatus for measuring deformation of crack part of bedrock - Google Patents
Apparatus for measuring deformation of crack part of bedrockInfo
- Publication number
- JPH09203646A JPH09203646A JP1253196A JP1253196A JPH09203646A JP H09203646 A JPH09203646 A JP H09203646A JP 1253196 A JP1253196 A JP 1253196A JP 1253196 A JP1253196 A JP 1253196A JP H09203646 A JPH09203646 A JP H09203646A
- Authority
- JP
- Japan
- Prior art keywords
- deformation
- crack
- rock
- flexible rod
- rod
- 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.)
- Pending
Links
Landscapes
- Measurement Of Force In General (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は岩盤亀裂部の変形測
定装置、更に詳細には簡易な機構により、岩盤亀裂部の
変形を３次元的に測定し得る安価な岩盤亀裂部の変形測
定装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rock crack deformation measuring device, and more particularly to an inexpensive rock crack deformation measuring device capable of three-dimensionally measuring deformation of a rock crack portion with a simple mechanism. .
【０００２】[0002]
【従来の技術】従来から、岩盤空洞建設時等において
は、岩盤亀裂の存在が岩盤挙動に大きく影響しており、
その挙動を把握するために種々の測定装置が提供されて
いる。また、近年においては、トンネルや、地下空洞等
の掘削に先立って、岩盤亀裂部の変形を３次元的に測定
するための測定装置が提案されている。2. Description of the Related Art Conventionally, the existence of a rock crack has a great influence on rock behavior during the construction of a rock cavity.
Various measuring devices are provided to grasp the behavior. Further, in recent years, a measuring device for three-dimensionally measuring the deformation of a rock crack portion has been proposed before excavating a tunnel, an underground cavity, or the like.
【０００３】その装置の一つとして、ボーリング孔内に
おいて、亀裂を挟む一方側の岩盤にその円柱状本体を固
定する固定手段を設け、円筒状本体の先端の円柱状エン
ドピースから少なくとも互いに直角な３方向に突出する
芯杆の先端に、他方側の岩盤の計測壁面に圧接するため
の先端接触子を設け、それぞれの芯杆の基端側に上記亀
裂を挟む岩盤間の３方向の相対的変形を芯杆の変位とし
て計測する差動変位計を設けた装置が提案されている
（特公平７−６７６２号公報参照）。As one of the devices, a fixing means for fixing the columnar main body to the rock on one side sandwiching the crack in the boring hole is provided, and at least a right angle is provided from the cylindrical end piece at the tip of the cylindrical main body. At the tip of the core rod protruding in three directions, a tip contactor for press contacting the measurement wall surface of the rock mass on the other side is provided, and the relative direction in three directions between the rock masses sandwiching the crack on the base end side of each core rod. An apparatus provided with a differential displacement gauge that measures deformation as displacement of a core rod has been proposed (see Japanese Patent Publication No. 7-6762).
【０００４】また、他の装置として、被測定物に開口部
から深部に向かって収束する所定形状の曲平面からなる
凹面を設けると共に、凹面の開口部に凹面の中心軸に対
して一定の傾斜角度をもって回転駆動することにより、
凹面上を回転走査してその回転軌跡に沿った凹面との相
対距離を測定する変位計を対向配置し、被測定物の変位
に伴って生じる凹面上の回転軌跡の変位を測定すること
により被測定物の３次元的な変位を計測する装置が提案
されている（特開平７−２５３３０７号公報参照）。As another device, a concave surface having a curved surface of a predetermined shape that converges from the opening toward the deep portion is provided on the object to be measured, and the opening of the concave surface has a constant inclination with respect to the central axis of the concave surface. By rotating at an angle,
Displacement gauges that rotate on the concave surface and measure the relative distance to the concave surface along the rotation locus are placed opposite to each other, and the displacement of the rotation locus on the concave surface caused by the displacement of the measured object is measured. A device for measuring the three-dimensional displacement of a measurement object has been proposed (see Japanese Patent Laid-Open No. 7-253307).
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上述し
た何れの装置においても、計測壁面に圧接するための接
触子が先端に設けられた芯杆をボーリング孔内において
互いに直交する３方向に突出させて、それぞれの芯杆の
基端側に差動変位計を設ける態様や、被測定物に設けた
凹面の中心軸に対して一定の傾斜角度をもって変位計を
回転駆動させる態様といった複雑な構造が採用されてい
るため装置全体が大規模となり、当該装置を設置するた
めのスペースを確保するにあたってもボーリング孔の規
模を従来に比べ拡大する必要があるうえ、装置全体の価
格を高騰させてしまうといった欠点がある。However, in any of the above-mentioned devices, the contact rod for contacting the measurement wall surface with pressure is provided with the core rod projecting in three directions orthogonal to each other in the boring hole. , A complicated structure such as a mode in which a differential displacement gauge is provided on the base end side of each rod, or a mode in which the displacement gauge is rotationally driven at a constant inclination angle with respect to the central axis of the concave surface provided on the object to be measured is adopted. As a result, the overall size of the device becomes large, and it is necessary to enlarge the size of the boring hole in comparison with the conventional method in order to secure the space for installing the device, and the cost of the entire device will rise sharply. There is.
【０００６】本発明は上記従来の技術の欠点に着目し、
これを解決せんとしたものであり、その目的は、簡易な
機構により、岩盤亀裂部の変形を３次元的に測定し得る
安価な岩盤亀裂部の変形測定装置を提供することにあ
る。The present invention focuses on the above-mentioned drawbacks of the prior art,
This problem is not solved, and an object thereof is to provide an inexpensive rock crack deformation measuring device capable of three-dimensionally measuring the deformation of a rock crack portion with a simple mechanism.
【０００７】[0007]
【課題を解決するための手段】本発明は上記の目的に鑑
みてなされたものであり、その要旨とするところは、岩
盤亀裂部に交差するボーリング孔内において、その亀裂
部の変形を測定する装置であって、上記岩盤亀裂部に交
差して配設される柔軟性棒状体と、ボーリング孔内に固
定され、上記柔軟性棒状体を緊張状態に保持する固定手
段と、上記柔軟性棒状体に埋設、又は貼設される少なく
とも６枚の歪ゲージと、各歪ゲージの歪に基づいて岩盤
亀裂部の変形状態を算出する処理手段と、を備えてなる
ことを特徴とする岩盤亀裂部の変形測定装置にある。こ
の態様によれば、簡易な機構により、岩盤亀裂部の変形
を３次元的に測定することができる安価な岩盤亀裂部の
変形測定装置を提供することができる。SUMMARY OF THE INVENTION The present invention has been made in view of the above object, and its gist is to measure the deformation of a crack in a boring hole intersecting the rock crack. A device, which is a flexible rod-shaped member that is disposed so as to intersect with the rock crack portion, a fixing unit that is fixed in a boring hole and holds the flexible rod-shaped member in a tensioned state, and the flexible rod-shaped member. Of at least 6 strain gauges embedded in or pasted in and the processing means for calculating the deformation state of the rock crack portion based on the strain of each strain gauge. It is in the deformation measuring device. According to this aspect, it is possible to provide an inexpensive rock-crack-deformation measuring apparatus capable of three-dimensionally measuring the deformation of the rock-crack portion with a simple mechanism.
【０００８】[0008]
【発明の実施の形態】本発明の岩盤亀裂部の変形測定装
置において、柔軟性棒状体としては、岩盤亀裂部の変形
に影響を与えない程度の柔軟性を有する棒状体に形成さ
れたものであればよく、例えば樹脂シートを棒状体に細
工したものや、中空或いは中実のプラスチック製棒状体
や、アクリル製の棒状体等の中から適当なものを採用す
ることができる。BEST MODE FOR CARRYING OUT THE INVENTION In the rock crack deformation measuring apparatus of the present invention, the flexible rod-shaped body is formed into a rod-shaped body having a flexibility that does not affect the deformation of the rock cracked portion. Any suitable material may be used, for example, a resin sheet made into a rod-shaped body, a hollow or solid plastic rod-shaped body, an acrylic rod-shaped body, or the like.
【０００９】また、固定手段として、例えば油圧シリン
ダージャッキ等、ボーリング孔内において伸縮し得る伸
縮制御機構により固定でき、或いは固定解除できる適当
なものを採用することができる。As the fixing means, for example, a hydraulic cylinder jack or the like which can be fixed or released by an expansion / contraction control mechanism capable of expanding / contracting in the boring hole can be adopted.
【００１０】柔軟性棒状体に埋設、又は貼設される少な
くとも６枚の歪ゲージとして、抵抗線歪ゲージ等、適当
なものを採用することができる。また、少なくとも６枚
の各歪ゲージを柔軟性棒状体に埋設、又は貼設するにあ
たっては、互いに直交するｘｙｚの各方向における岩盤
亀裂部の変形を測定し得るように各歪ゲージが異なる配
置となる態様、具体的には例えば３枚の歪ゲージの組合
せからなる３組の歪ゲージ群を柔軟性棒状体の内周面に
沿って周方向の等間隔に貼設するといった態様で各歪ゲ
ージを設ける。本発明にかかる岩盤亀裂部の変形測定装
置においては、予め求めておいた係数ａijと、測定され
た歪の値｛εi ｝とを後述する式に代入することによ
り、岩盤亀裂部の変形状態ｕx，ｕy，ｕz、ωx，ωy，
ωzを算出することができ、この６つの要素を算出する
ために、少なくとも６枚の歪ゲージを柔軟性棒状体に埋
設、又は貼設することを要する。As the at least 6 strain gauges embedded or attached to the flexible rod-shaped body, a suitable one such as a resistance wire strain gauge can be adopted. In addition, when embedding or pasting at least 6 strain gauges in the flexible rod-shaped body, the strain gauges should be arranged differently so that the deformation of the rock crack portion in each direction of xyz orthogonal to each other can be measured. Each strain gauge is formed in such a manner that, specifically, for example, three strain gauge groups each including a combination of three strain gauges are attached at equal intervals in the circumferential direction along the inner peripheral surface of the flexible rod-shaped body. To provide. In the rock crack deformation measuring device according to the present invention, the deformation of the rock crack portion can be obtained by substituting the coefficient a ij and the measured strain value {ε i } that have been obtained in advance into the equation described later. States u x , u y , u z , ω x , ω y ,
It is possible to calculate ω z, and it is necessary to embed or paste at least 6 strain gauges in the flexible rod-shaped body in order to calculate these 6 elements.
【００１１】尚、本発明にかかる岩盤亀裂部の変形測定
装置においては、岩盤亀裂部の変形が各歪ゲージにおい
てどの程度の歪として生じているか（岩盤亀裂部の変形
状態）については下式より算出することができ、下式中
の係数ａijは数値解析或いは室内試験等により把握して
おくことができる。In the rock-crack-deformation measuring apparatus according to the present invention, the degree of strain in the rock-crack-deformation at each strain gauge (deformation state of rock-crack part) is calculated from the following equation. It can be calculated, and the coefficient a ij in the following equation can be grasped in advance by numerical analysis or laboratory test.
【００１２】[0012]
【数１】 [Equation 1]
【００１３】[0013]
【実施例】以下、本発明の実施例を添付図面に基づいて
説明するが、本発明はこれに限定されるものではない。
ここで、図１（ａ）は本発明にかかる岩盤亀裂部の変形
測定装置を示す概略正面図、図１（ｂ）は図１（ａ）の
Ｂ−Ｂ線に沿う概略断面図、図１（ｃ）は図１（ｂ）の
Ｃ−Ｃ線に沿う概略断面図である。また、図２は図１の
岩盤亀裂部の変形測定装置を岩盤亀裂部と交差するボー
リング孔内に設置した態様を示す概略側面図である。図
３（ａ）〜（ｄ）は岩盤亀裂部及びその変形形態の例を
示す概略正面図である。Embodiments of the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Here, FIG. 1 (a) is a schematic front view showing a deformation measuring device for a rock crack portion according to the present invention, FIG. 1 (b) is a schematic cross-sectional view taken along line BB of FIG. 1 (a), and FIG. FIG. 1C is a schematic sectional view taken along the line C-C of FIG. FIG. 2 is a schematic side view showing a mode in which the deformation measuring device for a rock crack portion of FIG. 1 is installed in a boring hole intersecting with the rock crack portion. 3A to 3D are schematic front views showing an example of a rock crack portion and its modified form.
【００１４】岩盤８の亀裂８’部に交差するボーリング
孔９内において、その亀裂８’部の変形を測定する本発
明にかかる岩盤亀裂部の変形測定装置１０は、図１
（ａ）〜（ｃ）に示すように、亀裂８’が生じた岩盤８
の各亀裂８’面付近に配置される２つの固定部１１，１
１’と、各固定部１１，１１’間に配設される連結部１
２（柔軟性棒状体）と、該連結部１２内周面において上
記亀裂８’部と交差するようにその周方向の３箇所に貼
設された３組の歪ゲージ群１３とによって構成されてい
る。また、各歪ゲージ群１３は３つの歪ゲージ１３ａ〜
１３ｃからなっている。A rock crack deformation measuring device 10 according to the present invention for measuring the deformation of the crack 8'in a borehole 9 intersecting the crack 8'of the rock 8 is shown in FIG.
As shown in (a) to (c), the bedrock 8 having a crack 8 '.
Two fixing parts 11, 1 arranged near each crack 8 ′ surface of
1'and the connection part 1 arrange | positioned between each fixed part 11 and 11 '.
2 (flexible rod-shaped body) and three sets of strain gauge groups 13 attached at three positions in the circumferential direction so as to intersect the crack 8 ′ on the inner peripheral surface of the connecting portion 12. There is. In addition, each strain gauge group 13 includes three strain gauges 13a to
It consists of 13c.
【００１５】各固定部１１，１１’は、油圧シリンダー
ジャッキであって、ボーリング孔内において伸張により
自己を固定し、収縮により自己の固定を解除するように
固定制御部１５にて制御される。また、各固定部１１，
１１’間においては、連結部１２を緊張状態に保持して
いる。Each of the fixing portions 11 and 11 'is a hydraulic cylinder jack, and is controlled by the fixing control portion 15 so as to fix itself by stretching in the bore hole and release itself by contracting. In addition, each fixed portion 11,
Between 11 ', the connecting portion 12 is held in a tensioned state.
【００１６】この緊張状態に保持された連結部１２の内
部には、３組の歪ゲージ群１３が上述したように貼設さ
れており、また各歪ゲージ群１３は岩盤８の亀裂８’部
に交差するように配置された３つの歪ゲージ１３ａ〜１
３ｃからなっている。Inside the connecting portion 12 held in this tension state, three sets of strain gauge groups 13 are attached as described above, and each strain gauge group 13 is a crack 8'portion of the bedrock 8. Strain gauges 13a to 1 arranged so as to intersect with
It consists of 3c.
【００１７】また、ボーリング孔９の外部には処理部１
４が設けられており、この処理部１４では、各歪ゲージ
群１３にて測定された結果（ε1，ε2，ε3，…，
εn）、及び係数ａijに基づいて上述した式より、岩盤
亀裂部の変形状態（ｕx，ｕy，ｕz、ωx，ωy，ωz）を
算出することができる。A processing unit 1 is provided outside the boring hole 9.
4 are provided, and in the processing unit 14, the results (ε 1 , ε 2 , ε 3 , ..., And) measured by each strain gauge group 13 are provided.
The deformation state (u x , u y , u z , ω x , ω y , ω z ) of the rock crack portion can be calculated from the above-described equation based on ε n ) and the coefficient a ij .
【００１８】本発明にかかる上記岩盤亀裂部の変形測定
装置１０では、図３（ａ）〜（ｄ）に示すように、亀裂
８’を生じた岩盤８（図３（ａ））において、互いに直
交するｘｙｚの各方向における変形ｕx，ｕy，ｕz 、及
び各軸における（回転）変形ωx，ωy，ωz 、例えば図
３（ｂ）に示すようなｘ方向における変形ｕx や、図３
（ｃ）に示すようなｙ方向における変形ｕy や、図３
（ｄ）に示すようなｚ軸における回転した変形ωz 等を
纏めて算出することができる。In the rock crack deformation measuring device 10 according to the present invention, as shown in FIGS. 3 (a) to 3 (d), the rock mass 8 (FIG. 3 (a)) in which a crack 8'has occurred Deformation u x , u y , u z in each direction of orthogonal xyz, and (rotation) deformation ω x , ω y , ω z in each axis, for example, a deformation u x in the x direction as shown in FIG. 3B. And Fig. 3
The deformation u y in the y direction as shown in FIG.
The rotated deformation ω z on the z axis as shown in (d) can be collectively calculated.
【００１９】[0019]
【発明の効果】本発明の岩盤亀裂部の変形測定装置は、
簡易な機構により、岩盤亀裂部の変形を３次元的に測定
し得る安価な岩盤亀裂部の変形測定装置を提供すること
ができるといった顕著な効果を奏する。The deformation measuring device for the rock crack portion of the present invention is
With a simple mechanism, it is possible to provide an inexpensive rock-crack-deformation-measuring device capable of three-dimensionally measuring the deformation of the rock-crack.
【図１】（ａ）は本発明にかかる岩盤亀裂部の変形測定
装置を示す概略正面図、（ｂ）は図１（ａ）のＢ−Ｂ線
に沿う概略断面図、（ｃ）は図１（ｂ）のＣ−Ｃ線に沿
う概略断面図である。1A is a schematic front view showing a deformation measuring device for a rock crack portion according to the present invention, FIG. 1B is a schematic sectional view taken along the line BB of FIG. 1A, and FIG. It is a schematic sectional drawing which follows the CC line | wire of 1 (b).
【図２】図１の岩盤亀裂部の変形測定装置を岩盤亀裂部
と交差するボーリング孔内に設置した態様を示す概略側
面図である。FIG. 2 is a schematic side view showing an aspect in which the rock crack deformation measuring device of FIG. 1 is installed in a boring hole intersecting the rock crack portion.
【図３】（ａ）〜（ｄ）は岩盤亀裂部及びその変形形態
の例を示す概略正面図である。3 (a) to 3 (d) are schematic front views showing an example of a rock crack portion and its modified form.
７ トンネル ８ 岩盤 ８’ 亀裂 ９ ボーリング孔 １０ 本発明にかかる岩盤亀裂部の変形測定装置 １１ 油圧シリンダージャッキ（固定手段） １２ 連結部（柔軟性棒状体） １３ 歪ゲージ群 １３ａ〜１３ｃ 歪ゲージ １４ 処理部 １５ 固定制御部 7 Tunnel 8 Rock 8'Crack 9 Boring hole 10 Deformation measuring device of rock crack part according to the present invention 11 Hydraulic cylinder jack (fixing means) 12 Connection part (flexible rod-like body) 13 Strain gauge group 13a to 13c Strain gauge 14 Processing Section 15 Fixed control section
Claims (1)
おいて、その亀裂部の変形を測定する装置であって、 上記岩盤亀裂部に交差して配設される柔軟性棒状体と、
ボーリング孔内に固定され、上記柔軟性棒状体を緊張状
態に保持する固定手段と、上記柔軟性棒状体に埋設、又
は貼設される少なくとも６枚の歪ゲージと、各歪ゲージ
の歪に基づいて岩盤亀裂部の変形状態を算出する処理手
段と、を備えてなることを特徴とする岩盤亀裂部の変形
測定装置。1. A device for measuring the deformation of a crack in a borehole that intersects with the rock crack, the flexible rod being disposed so as to cross the rock crack.
Based on the strain of each strain gauge, a fixing means fixed in the boring hole and holding the flexible rod in a tensioned state, at least six strain gauges embedded in or attached to the flexible rod. And a processing means for calculating the deformation state of the rock crack portion, and a deformation measuring device for the rock crack portion, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1253196A JPH09203646A (en) | 1996-01-29 | 1996-01-29 | Apparatus for measuring deformation of crack part of bedrock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1253196A JPH09203646A (en) | 1996-01-29 | 1996-01-29 | Apparatus for measuring deformation of crack part of bedrock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09203646A true JPH09203646A (en) | 1997-08-05 |
Family
ID=11807922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1253196A Pending JPH09203646A (en) | 1996-01-29 | 1996-01-29 | Apparatus for measuring deformation of crack part of bedrock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09203646A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002206907A (en) * | 2001-01-10 | 2002-07-26 | Central Res Inst Of Electric Power Ind | Rockbed crack measuring method and device thereof |
| KR100618443B1 (en) * | 2005-07-06 | 2006-09-01 | 한국지질자원연구원 | Borehole wall sensor attachment device |
| KR101432069B1 (en) * | 2014-07-15 | 2014-08-21 | 주식회사 혜안지반 | Apparatus and methode for measuring in-situ stress of rock using overcoring |
-
1996
- 1996-01-29 JP JP1253196A patent/JPH09203646A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002206907A (en) * | 2001-01-10 | 2002-07-26 | Central Res Inst Of Electric Power Ind | Rockbed crack measuring method and device thereof |
| JP4562158B2 (en) * | 2001-01-10 | 2010-10-13 | 財団法人電力中央研究所 | Rock crack measuring method and apparatus |
| KR100618443B1 (en) * | 2005-07-06 | 2006-09-01 | 한국지질자원연구원 | Borehole wall sensor attachment device |
| KR101432069B1 (en) * | 2014-07-15 | 2014-08-21 | 주식회사 혜안지반 | Apparatus and methode for measuring in-situ stress of rock using overcoring |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5576485A (en) | Single fracture method and apparatus for simultaneous measurement of in-situ earthen stress state and material properties | |
| US4649741A (en) | Insitu soil shear measurement apparatus | |
| CA2015184C (en) | Method of instrumenting an already erected concrete structure and the so instrumented structure | |
| WO2019052553A1 (en) | Rock soil geologic body drilling deformation testing device and testing method thereof | |
| CN108414129B (en) | Device and method for testing relief of direct patch ground stress of semi-enclosure | |
| CN105043610A (en) | High-sensitivity drill hole deformeter for measuring crustal stress, and detection method thereof | |
| JP3852043B2 (en) | Method for evaluating the durability of concrete | |
| US4542655A (en) | Borehole stress-meter and method and apparatus for the installation thereof | |
| CN104483206A (en) | Device and method for measuring shearing property of transverse isotropic material | |
| JP2017500543A (en) | Deformation sensor package and method | |
| US6575025B1 (en) | Method and apparatus for measuring forces in the presence of external pressure | |
| JPH09203646A (en) | Apparatus for measuring deformation of crack part of bedrock | |
| JP2004170210A (en) | Measuring method and instrument for ground stress | |
| ITTO20100871A1 (en) | MEASUREMENT DEVICE | |
| JP4043568B2 (en) | In-situ hole bottom triaxial compression test method | |
| CN112695814B (en) | Miniature steel pipe pile stress field rapid monitoring method | |
| CN113108683B (en) | Automatic imaging measurement method and device for three-dimensional characterization of large-caliber well structure | |
| JPH1114356A (en) | Three-dimensional position detecting method | |
| CN112878296A (en) | Three-dimensional vector measuring ball with fixed base | |
| Mills | In situ stress measurement using the ANZI stress cell | |
| JPS62220823A (en) | Base rock pressure detector | |
| JP2651378B2 (en) | Load measuring device | |
| RU2333314C1 (en) | System for integrated earth probing | |
| JP4055188B2 (en) | Shaft insertion device and shaft insertion method | |
| JP2023086579A (en) | Displacement measurement device and ground displacement measurement method |