JP2961144B2 - Multi-axis underground displacement meter - Google Patents
Multi-axis underground displacement meterInfo
- Publication number
- JP2961144B2 JP2961144B2 JP30827893A JP30827893A JP2961144B2 JP 2961144 B2 JP2961144 B2 JP 2961144B2 JP 30827893 A JP30827893 A JP 30827893A JP 30827893 A JP30827893 A JP 30827893A JP 2961144 B2 JP2961144 B2 JP 2961144B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- measuring
- displacement meter
- multiaxial
- rear end
- 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
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Description
【0001】[0001]
【産業上の利用分野】この発明は、多軸地中変位計に関
し、特に、地盤に穿孔した孔井内に複数設置した測点部
と、孔口に設けた計測部との間の相対位置の変化を計測
部により検出することによって、地盤の変位を計測する
多軸地中変位計に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiaxial underground displacement meter and, more particularly, to a relative position measurement between a plurality of measuring points provided in a well bore formed in a ground and a measuring section provided in a hole. The present invention relates to a multiaxial underground displacement meter that measures displacement of the ground by detecting a change by a measurement unit.
【0002】[0002]
【従来の技術】従来より、土木工学・鉱山学の分野にお
いて、あるいは地球物理学の分野において、岩盤の挙動
や地殻の挙動を適正に評価すべく、または、土質工学の
分野において土質挙動監視モニターの資料を得るため、
地盤の変位計測が行われている。そして、かかる地盤の
変位計測の方法として、一般に、エクステンソメータに
よるものが採用されている。すなわち、この方法は、岩
盤やその他の地盤に穿孔した孔井内に固定測点を設け、
この固定測点と孔口に設けた測点との間の孔軸方向に沿
った相対位置の変動を固定測点から延長するワイヤーや
ロッドを介して孔口まで伝達し、これを孔口に固定した
差動トランスなどの変位計によって検出・計測するもの
である。2. Description of the Related Art Conventionally, in the field of civil engineering and mining, or in the field of geophysics, in order to properly evaluate the behavior of rock or the crust, or in the field of soil engineering, a soil behavior monitoring monitor. In order to obtain the material of
Ground displacement measurement is being performed. As a method of measuring the displacement of the ground, a method using an extensometer is generally employed. In other words, this method establishes a fixed measuring point in a borehole drilled in rock or other ground,
The change of the relative position along the hole axis direction between the fixed measuring point and the measuring point provided at the hole is transmitted to the hole via a wire or rod extending from the fixed measuring point, and this is transmitted to the hole. It is to be detected and measured by a displacement meter such as a fixed differential transformer.
【0003】そして、この方法では、孔井内の固定測点
をモルタルや接着剤などによって孔井内に固着する一方
で、かかる固定測点を一つの孔井内に複数設置すること
により、組織的な多点計測が可能になって精度良く地盤
の変位計測を行なうことができる。[0003] In this method, the fixed measuring points in the well are fixed to the well using a mortar, an adhesive, or the like. Point measurement becomes possible, and the displacement of the ground can be measured with high accuracy.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、上記エ
クステンソメータによって、一つの孔井内に複数設けた
固定測点の各変位を測定するには以下のような問題があ
った。However, measuring the displacements of a plurality of fixed measuring points provided in one borehole by the above-mentioned extensometer has the following problems.
【0005】すなわち、従来の方法によれば、複数設け
た固定測点の各変位の測定は、各固定測点に接続した各
々のワイヤーやロッドにそれぞれ変位計を接続して行わ
れるとともに、各固定測点は孔井内に固着されて移動す
ることができないため、例えばトンネルの支保設計や施
工評価を目的とした地盤変形計測において、地盤全体の
組織的な多点計測を簡便、経済的かつ効率的に高精度計
測する必要がある場合になどには、かかる要望に十分に
対応することができないという問題があった。That is, according to the conventional method, each displacement of a plurality of fixed measuring points is measured by connecting a displacement meter to each wire or rod connected to each fixed measuring point. Since fixed stations cannot be moved because they are fixed inside the borehole, systematic multi-point measurement of the entire ground is simple, economical and efficient, for example, in ground deformation measurement for tunnel support design and construction evaluation. For example, when it is necessary to perform high-precision measurement, there is a problem that such a demand cannot be sufficiently satisfied.
【0006】そこで、この発明は、このような従来の問
題点を鑑みてなされたものであり、地盤全体の組織的な
多点計測を簡便、経済的かつ効率的に行なうことができ
るとともに、一孔井内の複数の固定測点の変位を高精度
に計測することのできる多軸地中変位計を提供すること
を目的とするものである。Accordingly, the present invention has been made in view of such a conventional problem, and it is possible to easily, economically and efficiently perform systematic multi-point measurement of the entire ground. It is an object of the present invention to provide a multiaxial underground displacement meter capable of measuring displacements of a plurality of fixed measuring points in a well well with high accuracy.
【0007】[0007]
【課題を解決するための手段】この発明は上記目的を達
成するためになされたもので、その要旨は、地盤に穿孔
した孔井内に複数設置した測点部と、孔口に設けた計測
部との間の相対位置の変化を、各測点部と各々接続する
とともに孔口まで延長する線形部材を介して計測部によ
り検出することによって、地盤の変位を計測する多軸地
中変位計であって、各測点部が、油圧シリンダ、スプリ
ング等の伸縮手段によって孔井の径方向に進退すること
により、各測点部を孔井内に着脱自在に固定する固定手
段と、孔井の軸方向に開口する挿通孔であって当該測点
部より前方に位置する測点部から延長する各線形部材を
各々干渉させることなく挿通保持する保持孔とを有する
ことを特徴とする多軸地中変位計にある。SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and the gist of the present invention is to provide a measuring point provided at a plurality of measuring points provided in a well bore formed in a ground. A multi-axial underground displacement meter that measures the displacement of the ground by detecting the change in the relative position between the measuring point via a linear member that is connected to each measuring point and extends to the hole mouth. Fixing means for detachably fixing each measuring point portion in the borehole by moving each measuring point portion in the radial direction of the well by means of a telescopic means such as a hydraulic cylinder or a spring; and a shaft of the well hole. And a holding hole for inserting and holding each linear member extending from the measuring point located forward of the measuring point without interfering with each other. In the displacement meter.
【0008】ここで、この発明の多軸地中変位計は、前
記孔口に設けた計測部が、前記孔口まで延長した複数の
線形部材の後端面との距離を、レーザ光、電磁波等を介
して計測する非接触距離測定手段を有することが好まし
い。In the multiaxial underground displacement meter according to the present invention, the measuring section provided at the hole may measure a distance between a rear end face of a plurality of linear members extending to the hole and a laser beam, an electromagnetic wave or the like. It is preferable to have a non-contact distance measuring means for measuring via a.
【0009】また、この発明の多軸地中変位計は、前記
孔口まで延長した複数の線形部材の後端面を孔口部にお
いて一の円周上に配置するとともに、該円周上に配置さ
れた後端面と対向して前記非接触距離測定手段を配置
し、前記レーザ光、電磁波等を前記円周に沿って回転走
査させることにより、複数の後端面の変位を前記非接触
距離測定手段によって連続計測することが好ましい。Further, in the multiaxial underground displacement meter of the present invention, the rear end faces of the plurality of linear members extending to the hole are arranged on one circumference at the hole, and are arranged on the circumference. The non-contact distance measuring means is arranged in opposition to the rear end face, and the laser light, the electromagnetic wave, and the like are rotated and scanned along the circumference to thereby displace the plurality of rear end faces to the non-contact distance measuring means. Is preferably measured continuously.
【0010】さらに、この発明の多軸地中変位計は、前
記孔口まで延長した複数の線形部材の各後端面には、該
線形部材の軸方向に伸縮調整可能な面部材を取り付ける
こともできる。Further, in the multiaxial underground displacement meter according to the present invention, a surface member capable of adjusting the expansion and contraction in the axial direction of the linear member may be attached to each rear end surface of the plurality of linear members extending to the hole. it can.
【0011】そして、この発明の多軸地中変位計は、さ
らに、前記非接触距離測定手段の回転・計測とデータ記
録を制御するCPU、レーザ光、電磁波等のパワーコン
トロール付き変位信号増幅器、AD変換器及びデータ記
録メモリーを一体にしたデータロガーを備えることもで
きる。The multiaxial underground displacement meter according to the present invention further comprises a CPU for controlling rotation / measurement and data recording of the non-contact distance measuring means, a displacement signal amplifier with power control for laser light, electromagnetic waves, etc. It is also possible to provide a data logger integrating the converter and the data recording memory.
【0012】[0012]
【作用】この発明の多軸地中変位計によれば、孔井内に
複数設置した測点部は、各々着脱自在な固定手段を有す
るとともに、各測点部に接続して孔口まで延長する線形
部材は、後続する測点部の各保持孔に保持されて互いに
干渉することなく整然と孔口まで延長する。したがっ
て、固定手段を開放するとともに線形部材を介して進退
移動させることにより、各測点部を適宜個所に容易に再
設置することができるとともに、各測点部を固定した後
の、地盤の変位に伴なう複数の測点部の各変位量を精度
良く孔口に伝達することができる。According to the multiaxial underground displacement meter of the present invention, the plurality of measuring points installed in the borehole have detachable fixing means and are connected to the measuring points and extend to the hole. The linear member is held in each holding hole of the subsequent measuring point portion and extends to the hole without any interference with each other. Therefore, by releasing the fixing means and moving forward and backward through the linear member, each measuring point can be easily re-installed at an appropriate place, and the displacement of the ground after fixing each measuring point. , The displacements of the plurality of measuring points can be accurately transmitted to the hole.
【0013】また、孔口まで延長した前記線形部材の各
後端面との距離を、レーザ光、電磁波等による非接触距
離測定手段を用いて計測すればより迅速に変位の計測を
行なうことができる。Further, the displacement can be measured more quickly by measuring the distance between the linear member extending to the hole and each rear end face by using a non-contact distance measuring means using laser light, electromagnetic waves or the like. .
【0014】さらに、孔口まで延長した複数の線形部材
の各後端面を孔口部において一の円周上に配置するとと
もに、該円周上に配置された各後端面と対向して前記非
接触距離測定手段を配置し、前記レーザ光、電磁波等を
前記円周に沿って回転走査させれば、一の測定手段によ
って複数の後端面の変位を容易に連続計測することがで
きる。Further, each of the rear end faces of the plurality of linear members extending to the hole is disposed on one circumference at the hole, and the rear end face is opposed to each of the rear end faces disposed on the circumference. If a contact distance measuring means is arranged and the laser beam, electromagnetic wave or the like is rotated and scanned along the circumference, displacement of a plurality of rear end faces can be easily and continuously measured by one measuring means.
【0015】さらにまた、孔口まで延長した線形部材の
後端面に、該線形部材の軸方向に伸縮調整可能な面部材
を取り付ければ、地盤の変位に伴なう測点部の変位量が
多大になって接触距離測定手段による計測範囲を越える
場合でも、測定面の位置を調整することにより引続き変
位の測定を行なうことができる。Further, if a surface member that can be adjusted in the axial direction of the linear member is attached to the rear end surface of the linear member extending to the hole, the displacement of the measuring point accompanying the displacement of the ground is large. Therefore, even when the measurement range is exceeded by the contact distance measuring means, the displacement can be continuously measured by adjusting the position of the measurement surface.
【0016】そして、この発明の多軸地中変位計は、さ
らに、前記非接触距離測定手段の回転・計測とデータ記
録を制御するCPU、レーザ光、電磁波等のパワーコン
トロール付き変位信号増幅器、AD変換器及びデータ記
録メモリーを一体にしたデータロガーと接続することに
より、地盤変位の長期間の自動計測が可能になる。The multiaxial underground displacement meter of the present invention further includes a CPU for controlling rotation / measurement and data recording of the non-contact distance measuring means, a displacement signal amplifier with power control for laser light, electromagnetic waves, etc. By connecting the converter and the data recording memory to an integrated data logger, long-term automatic measurement of ground displacement becomes possible.
【0017】[0017]
【実施例】以下、この発明の一実施例を図面を参照しつ
つ詳細に説明する。図1は、この実施例にかかる多軸地
中変位計を用いて地盤の変位を計測する状況を示す概略
断面図である。すなわち、この実施例にかかる多軸地中
変位計10は、主として、岩盤11に穿孔形成した孔井
12内において、複数箇所に設置される測点部13と、
各測点部13に各々接続するとともに孔井12に沿って
孔口14まで延長する線形部材としての高剛性ロッド1
5と、孔口14から突出した高剛性ロッド15の端面と
対向して孔口部に配置された計測部16とによって構成
される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a situation where the ground displacement is measured using the multiaxial underground displacement meter according to this embodiment. That is, the multiaxial underground displacement meter 10 according to this embodiment mainly includes a measurement point unit 13 installed at a plurality of locations in a well 12 formed by drilling a rock 11.
High rigid rod 1 as a linear member connected to each measuring point 13 and extending along hole 12 to hole 14
5 and a measuring unit 16 disposed at the hole facing the end face of the high-rigidity rod 15 protruding from the hole 14.
【0018】各測点部13は、図2に拡大して示すよう
に、孔井12内に挿入可能な断面を有する筒状の測点部
本体17と、この測点部本体17を横断して設けられる
とともに孔井12の径方向に進退する固定シリンダ18
とからなるものである。そして、固定シリンダ18は、
第一の隔室19に設けたスプリング20によって、先端
の固定ピン30が径方向外方に突出するよう付勢される
とともに、圧力供給ライン21を介して第二の隔室22
に送り込まれる油圧力により、スプリング20の付勢力
に抗して固定ピン30を径方向内方に後退する。すなわ
ち、この固定シリンダ18の先端に設けた固定ピン30
は、圧力供給ライン21からの油圧力を制御することに
よって孔井12の径方向に適宜摺動進退し、これによっ
て各測点部13の孔井12への固定及びその解除を任意
に行なうことができる。As shown in the enlarged view of FIG. 2, each measuring point 13 has a cylindrical measuring point main body 17 having a cross section that can be inserted into the borehole 12 and a crossing of the measuring point main body 17. Fixed cylinder 18 which is provided at
It consists of: And the fixed cylinder 18
A spring 20 provided in the first compartment 19 urges the fixing pin 30 at the distal end so as to protrude radially outward, and a second compartment 22 through a pressure supply line 21.
The fixing pin 30 is retracted radially inward against the urging force of the spring 20 by the hydraulic pressure fed to the spring 20. That is, the fixed pin 30 provided at the tip of the fixed cylinder 18
Controls the hydraulic pressure from the pressure supply line 21 to slide and retreat as appropriate in the radial direction of the well 12, whereby the measuring points 13 can be fixed to the well 12 and released arbitrarily. Can be.
【0019】また、各測点部13には、測点部本体17
の後端部と接続して高剛性ロッド15が取り付けられて
いる。高剛性ロッド15は、好ましくは温度差による伸
縮の少ない例えば炭素鋼,ニッケル鋼等の材料からな
り、各高剛性ロッド15は後方に位置する各測点部13
に設けられた、孔井12の軸方向に開口する保持孔に挿
通保持されつつ孔口14まで延長する。すなわち、各測
点部13の測点部本体17には、これの外縁部に沿って
円周状に、前方の測点部13への高剛性ロッド15の取
り付け位置と対応する位置に前記保持孔が開口形成され
ているので、後方に位置する測点部13の、前記取り付
け位置と対応する各保持孔に、順次高剛性ロッドを挿通
して行くことにより、各高剛性ロッド15は互いに干渉
することなく並行して整然と孔口14まで延長する。な
お、図1及び図2において、23はガイド部材で、測点
部13と同様に孔井12の軸方向に開口する保持孔を有
し、隣接する測点部13の設置間隔が大きい場合等に測
点部13の間に配置されて、これの保持孔により測点部
13とともに高剛性ロッド15を保持するものである
が、このガイド部材23の保持孔を測点部13の保持孔
として用いることもできる。Each measuring point 13 has a measuring point main body 17.
A high-rigidity rod 15 is attached so as to be connected to the rear end portion. The high-rigidity rods 15 are preferably made of a material such as carbon steel, nickel steel or the like which is less likely to expand and contract due to a temperature difference.
Is extended to the hole 14 while being inserted and held in the holding hole that opens in the axial direction of the well 12. That is, the measuring unit main body 17 of each measuring unit 13 is held at a position corresponding to the mounting position of the high-rigidity rod 15 on the front measuring unit 13 in a circumferential shape along the outer edge thereof. Since the holes are formed, the high-rigidity rods 15 interfere with each other by sequentially inserting the high-rigidity rods into the holding holes corresponding to the mounting positions of the measuring section 13 located rearward. It extends to the hole 14 in parallel and orderly without doing. In FIGS. 1 and 2, reference numeral 23 denotes a guide member which has a holding hole that opens in the axial direction of the well 12, similarly to the measuring section 13, and in which the installation interval between the adjacent measuring sections 13 is large. The high-rigidity rod 15 is held together with the measuring portion 13 by the holding holes of the guide member 23. The holding holes of the guide member 23 are used as the holding holes of the measuring portion 13. It can also be used.
【0020】そして、孔井12の孔口部に配設された計
測部には、基準点として、図3に拡大して示すように、
孔口14から突出する高剛性ロッド15の後端面と対向
して配置された非接触距離測定手段としてのレーザ変位
計24が設けられている。レーザ変位計24は公知のも
ので、孔口部の岩盤壁面に固定された支持フレーム25
によって、高剛性ロッド15の前記端面と対向支持され
るとともに、モータ26によって回転駆動することによ
り、照射レーザ29を、一の円周上に配設された複数の
高剛性ロッド15の後端面に沿って回転走査させる。す
なわち、各高剛性ロッド15は、測点部13あるいはガ
イド部材23の外縁部に沿って円周状に配設された前記
各保持孔に各々挿通保持されて孔口14まで延長するの
で、各高剛性ロッド15の端面は、図4に示すように一
の円周上に整然と配設されることになる。したがって、
この円周に沿ってレーザ変位計24からの照射レーザ2
9を所定の周期で回転走査させることにより、複数の測
点部13の変位すなわち各高剛性ロッド15の端面の変
位が連続して多点計測される。Then, as shown in the enlarged view of FIG. 3, the measuring section provided at the opening of the well 12 has
A laser displacement meter 24 is provided as non-contact distance measuring means, which is disposed to face a rear end surface of the high rigid rod 15 protruding from the hole 14. The laser displacement meter 24 is of a known type, and has a support frame 25 fixed to the rock wall surface at the hole opening.
Thus, the irradiation laser 29 is rotatably driven by a motor 26 while being opposed to the end face of the high-rigidity rod 15 so that the irradiation laser 29 is moved to the rear end faces of the plurality of high-rigidity rods 15 arranged on one circumference. Scan along the axis. That is, since each of the high-rigidity rods 15 is inserted and held in each of the holding holes circumferentially arranged along the outer edge of the measuring point portion 13 or the guide member 23 and extends to the hole 14, The end face of the high-rigidity rod 15 is arranged neatly on one circumference as shown in FIG. Therefore,
Irradiation laser 2 from laser displacement meter 24 along this circumference
By rotating and scanning 9 at a predetermined cycle, the displacement of the plurality of measuring points 13, that is, the displacement of the end face of each high-rigidity rod 15, is continuously measured at multiple points.
【0021】なお、各高剛性ロッド15の後端部には面
部材27が取り付けられている。この面部材27は測定
面としての高剛性ロッド15の後端面を形成するととも
に、例えば高剛性ロッド15の後端部に設けた雄ネジと
面部材27の内周面に設けた雌ネジとによって、高剛性
ロッド15の軸方向に伸縮調整可能な構成を有してい
る。A surface member 27 is attached to the rear end of each high-rigidity rod 15. The surface member 27 forms a rear end surface of the high-rigidity rod 15 as a measurement surface, and includes, for example, a male screw provided at a rear end portion of the high-rigidity rod 15 and a female screw provided on an inner peripheral surface of the surface member 27. In addition, the high rigid rod 15 has a configuration capable of adjusting the expansion and contraction in the axial direction.
【0022】また、レーザ変位計24は、当該レーザ変
位計24の回転・計測とデータ記録を制御するCPU、
レーザ光、電磁波等のパワーコントロール付き変位信号
増幅器、AD変換器及びデータ記録メモリーを一体にし
たデータロガー28と接続している。The laser displacement meter 24 includes a CPU for controlling rotation / measurement and data recording of the laser displacement meter 24,
It is connected to a data logger 28 in which a displacement signal amplifier with power control for laser light, electromagnetic waves, etc., an AD converter and a data recording memory are integrated.
【0023】そして、この実施例の多軸地中変位計10
によれば、各測点部13は、固定シリンダ18による孔
井12への固定を解除するとともに、高剛性ロッド15
を介して進退移動することにより、孔井12内の任意の
箇所に容易に再設置することができる。また、各測点部
13に接続する高剛性ロッド15は、後続する測点部1
3あるいはガイド部材23の各保持孔に挿通保持されて
互いに干渉することなく整然と孔口14まで延長すの
で、地盤の変位に伴なう測点部13の孔軸に沿った変位
量を的確に孔口14まで伝達する。The multiaxial underground displacement meter 10 of this embodiment
According to the above, each of the measuring points 13 releases the fixing to the well 12 by the fixing cylinder 18 and the high rigid rod 15
And can be easily re-installed at an arbitrary position in the well 12. The high-rigidity rod 15 connected to each of the measuring points 13 is connected to the following measuring points 1.
3 or the guide member 23 is inserted into and held by each holding hole, and extends to the hole 14 without any interference, so that the displacement amount along the hole axis of the measuring point portion 13 accompanying the displacement of the ground can be accurately determined. It is transmitted to the hole 14.
【0024】また、高剛性ロッド15の後端面の変位の
計測をレーザ光を用いて迅速に行なうことができるとと
もに、各後端面が配された一の円周に沿ってレーザ光を
回転走査させることにより複数の測点部13の変位を一
台のレーザ変位計24によって容易に連続計測すること
ができる。Further, the displacement of the rear end face of the high-rigidity rod 15 can be quickly measured using laser light, and the laser light is rotated and scanned along one circumference on which each rear end face is arranged. Thus, the displacement of the plurality of measuring points 13 can be easily and continuously measured by one laser displacement meter 24.
【0025】さらに、高剛性ロッド15の後端面は、高
剛性ロッド15の軸方向に伸縮調整可能な面部材27に
よって構成されているので、後端面の変位が大きくなっ
て照射レーザ29の回転走査によるレーザ変位計24の
計測範囲を越える場合でも、後端面の位置を伸縮調整す
ることにより、引き続き連続して変位の計測を行なうこ
とができる。Further, since the rear end surface of the high-rigidity rod 15 is constituted by the surface member 27 which can be adjusted to expand and contract in the axial direction of the high-rigidity rod 15, the displacement of the rear end surface increases and the rotation scanning of the irradiation laser 29 is performed. In this case, the displacement can be continuously measured by adjusting the position of the rear end surface even if the measurement range of the laser displacement meter 24 is exceeded.
【0026】そして、高剛性ロッド15の後端面の変位
は、レーザ変位計24に接続したデータロガー28内の
レーザパワーコントロール付き変位信号増幅器によって
電圧アナログ信号として出力させ、AD変換器を介して
電圧デジタル信号に変換してCPUに取り込む。また、
岩盤内測点の変位を孔口2の基準点からの相対的変化と
して検出するため、CPUによる初期値補正を行った
後、各測点の時系列データファイルにしてデータ記録メ
モリーに記録する。データロガー28内のCPUには併
せて計測インターバル制御、レーザ変位計の回転制御お
よびデータファイル入出力制御を組み込み、フィールド
における長期間の自動計測を実現する。したがって、岩
盤壁面や斜面などの破壊や崩落に至る現象の予知モニタ
ーを得ることもできる。The displacement of the rear end face of the high-rigidity rod 15 is output as a voltage analog signal by a displacement signal amplifier with laser power control in a data logger 28 connected to the laser displacement meter 24, and the voltage is converted via an AD converter. It is converted into a digital signal and taken into the CPU. Also,
In order to detect the displacement of the station in the rock as a relative change from the reference point of the hole 2, after initial value correction by the CPU, the time-series data file of each station is recorded in the data recording memory. The CPU in the data logger 28 also incorporates measurement interval control, rotation control of the laser displacement meter, and data file input / output control to realize long-term automatic measurement in the field. Therefore, it is possible to obtain a monitor for predicting a phenomenon leading to destruction or collapse of a rock wall surface or a slope.
【0027】[0027]
【発明の効果】以上詳細に説明したように、この発明の
多軸地中変位計によれば、地盤に穿孔した孔井内に複数
設置した各測点部を容易に移動して適宜個所に再設置す
ることができるとともに、各測点部に接続されて孔口ま
で延長する線形部材は、保持孔により挿通保持されて各
々干渉することなく整然と孔口まで延長することによ
り、各測点部の変位を的確に孔口に伝達することができ
るので、地盤全体の組織的な多点計測を簡便、経済的か
つ効率的に行なうことのできとともに、一孔井内の複数
の測点部の変位を高精度に計測することができる。As described above in detail, according to the multiaxial underground displacement meter of the present invention, a plurality of measuring points installed in a well bored in the ground are easily moved and relocated to appropriate places. The linear member that can be installed, and is connected to each measuring point and extends to the hole, is inserted and held by the holding hole, and extends to the hole without any interference, so that each linear member can be installed. Since the displacement can be accurately transmitted to the hole, the systematic multi-point measurement of the entire ground can be performed easily, economically and efficiently, and the displacement of multiple measurement points within one well can be measured. It can measure with high accuracy.
【0028】また、孔口まで延長した前記線形部材の各
後端面との距離を、レーザ光、電磁波等による非接触距
離測定手段を用いて計測すればより迅速に変位の計測を
行なうことができる。Further, the displacement can be measured more quickly by measuring the distance between the linear member extending to the hole and each rear end face using a non-contact distance measuring means using a laser beam, an electromagnetic wave or the like. .
【0029】さらに、複数の線形部材の各後端面を孔口
部において一の円周上に配置するとともに、前記レーザ
光、電磁波等を前記円周に沿って走査させれば、一の測
定手段によって複数の後端面の変位を容易に連続計測す
ることができる。Further, if the rear end faces of the plurality of linear members are arranged on one circumference at the hole portion, and the laser beam, the electromagnetic wave or the like is scanned along the circumference, one measuring means can be obtained. This makes it possible to easily and continuously measure displacements of a plurality of rear end faces.
【0030】さらにまた、線形部材の後端面に、該線形
部材の軸方向に伸縮調整可能な面部材を取り付ければ、
測点部の変位量が接触距離測定手段による計測範囲を越
える場合でも、測定面の位置を調整することにより引続
き変位の連続測定を行なうことができる。Furthermore, if a surface member that can be adjusted in the axial direction of the linear member is attached to the rear end surface of the linear member,
Even when the displacement amount of the measuring point portion exceeds the measurement range of the contact distance measuring means, the displacement can be continuously measured by adjusting the position of the measurement surface.
【0031】そして、この発明の多軸地中変位計は、さ
らに、前記非接触距離測定手段の回転・計測とデータ記
録を制御するCPU、レーザ光、電磁波等のパワーコン
トロール付き変位信号増幅器、AD変換器及びデータ記
録メモリーを一体にしたデータロガーと接続することに
より、地盤変位の長期間の自動計測が可能になる。The multiaxial underground displacement meter according to the present invention further includes a CPU for controlling rotation / measurement and data recording of the non-contact distance measuring means, a displacement signal amplifier with power control for laser light, electromagnetic waves, etc. By connecting the converter and the data recording memory to an integrated data logger, long-term automatic measurement of ground displacement becomes possible.
【図1】この発明の一実施例にかかる多軸地中変位計を
用いて地盤の変位を計測する状況を示す概略断面図であ
る。FIG. 1 is a schematic cross-sectional view showing a situation where a ground displacement is measured using a multiaxial underground displacement meter according to one embodiment of the present invention.
【図2】孔井内に設置した測点部の構成を示す断面図で
ある。FIG. 2 is a cross-sectional view showing a configuration of a measuring point installed in a borehole.
【図3】孔口に設けた計測部の構成を示す断面図であ
る。FIG. 3 is a cross-sectional view illustrating a configuration of a measurement unit provided in a hole.
【図4】図3のA−Aに沿った側面図である。FIG. 4 is a side view along AA of FIG. 3;
10 多軸地中変位計 11 岩盤 12 孔井 13 測点部 14 孔口 15 高剛性ロッド(線形部材) 16 計測部 18 固定シリンダ(固定手段) 20 スプリング 23 ガイド部材 24 レーザ変位計(非接触距離測定手段) 27 面部材 28 データロガー DESCRIPTION OF SYMBOLS 10 Multiaxial underground displacement meter 11 Rock mass 12 Hole 13 Measurement point 14 Hole 15 High rigid rod (linear member) 16 Measurement part 18 Fixed cylinder (fixing means) 20 Spring 23 Guide member 24 Laser displacement meter (Non-contact distance) Measurement means) 27 face members 28 data logger
───────────────────────────────────────────────────── フロントページの続き 審査官 渡部 葉子 (56)参考文献 特開 昭49−96759(JP,A) (58)調査した分野(Int.Cl.6,DB名) G01C 7/06 E21B 47/00,47/01 G01C 9/00 ──────────────────────────────────────────────────続 き Continuing on the front page Examiner Yoko Watanabe (56) References JP-A-49-96759 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) G01C 7/06 E21B 47 / 00,47 / 01 G01C 9/00
Claims (5)
点部と、孔口に設けた計測部との間の相対位置の変化
を、各測点部と各々接続するとともに孔口まで延長する
線形部材を介して計測部により検出することによって、
地盤の変位を計測する多軸地中変位計であって、各測点
部が、油圧シリンダ、スプリング等の伸縮手段によって
孔井の径方向に進退することにより、各測点部を孔井内
に着脱自在に固定する固定手段と、孔井の軸方向に開口
する挿通孔であって当該測点部より前方に位置する測点
部から延長する各線形部材を各々干渉させることなく挿
通保持する保持孔とを有することを特徴とする多軸地中
変位計。1. A change in the relative position between a plurality of measuring points provided in a borehole drilled in the ground and a measuring part provided in a hole is connected to each measuring point and extended to the hole. By the measuring unit through the linear member
A multiaxial underground displacement meter that measures the displacement of the ground.Each measuring point is moved in the radial direction of the well by telescopic means such as a hydraulic cylinder, a spring, etc., so that each measuring point is located in the well. Fixing means for removably fixing, and a holding means for inserting and holding each linear member extending from a measuring point located in front of the measuring point with an insertion hole opened in the axial direction of the well without interfering with each other. A multiaxial underground displacement meter characterized by having a hole.
で延長した複数の線形部材の後端面との距離を、レーザ
光、電磁波等を介して計測する非接触距離測定手段を有
することを特徴とする請求項1に記載の多軸地中変位
計。2. A non-contact distance measuring means for measuring a distance between a rear end face of a plurality of linear members extending to the hole through a laser beam, an electromagnetic wave, or the like, wherein a measuring unit provided at the hole. The multiaxial underground displacement meter according to claim 1, wherein:
後端面を孔口部において一の円周上に配置するととも
に、該円周上に配置された後端面と対向して前記非接触
距離測定手段を配置し、前記レーザ光、電磁波等を前記
円周に沿って回転走査させることにより、複数の後端面
の変位を前記非接触距離測定手段によって連続計測する
ことを特徴とする請求項2に記載の多軸地中変位計。3. A rear end surface of the plurality of linear members extending to the hole is disposed on one circumference at the hole portion, and the non-contact is opposed to the rear end surface disposed on the circumference. A distance measuring means is arranged, and the displacement of a plurality of rear end faces is continuously measured by the non-contact distance measuring means by rotating and scanning the laser beam, the electromagnetic wave and the like along the circumference. 3. The multiaxial underground displacement meter according to 2.
各後端面には、該線形部材の軸方向に伸縮調整可能な面
部材を取り付けたことを特徴とする請求項2又は請求項
3に記載の多軸地中変位計。4. The linear member extending to the hole has a rear surface attached to each of the rear end surfaces thereof, the surface member being adjustable in expansion and contraction in the axial direction of the linear member. 2. The multiaxial underground displacement meter according to 1.
データ記録を制御するCPU、レーザ光、電磁波等のパ
ワーコントロール付き変位信号増幅器、AD変換器及び
データ記録メモリーを一体にしたデータロガーをさらに
備えることを特徴とする請求項3又は請求項4に記載の
多軸地中変位計。5. A data logger integrating a CPU for controlling rotation / measurement and data recording of said non-contact distance measuring means, a displacement signal amplifier with power control for laser light, electromagnetic waves, etc., an AD converter and a data recording memory. The multiaxial underground displacement meter according to claim 3, further comprising:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30827893A JP2961144B2 (en) | 1993-12-08 | 1993-12-08 | Multi-axis underground displacement meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30827893A JP2961144B2 (en) | 1993-12-08 | 1993-12-08 | Multi-axis underground displacement meter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07159163A JPH07159163A (en) | 1995-06-23 |
JP2961144B2 true JP2961144B2 (en) | 1999-10-12 |
Family
ID=17979111
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP30827893A Expired - Lifetime JP2961144B2 (en) | 1993-12-08 | 1993-12-08 | Multi-axis underground displacement meter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2961144B2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6202265B2 (en) * | 2013-10-03 | 2017-09-27 | 株式会社大林組 | Displacement sensor bedrock installation structure |
CN108050986B (en) * | 2017-12-13 | 2019-09-20 | 河北工业大学 | The method for determining Rock And Soil internal rupture face position is monitored based on multipoint displacement meter |
CN114753418B (en) * | 2022-04-20 | 2023-03-03 | 中铁建工集团有限公司 | Deep foundation pit engineering settlement inclination measuring and monitoring device in civil engineering |
CN114812488B (en) * | 2022-05-24 | 2023-10-27 | 中国一冶集团有限公司 | Wall surface verticality flatness measuring device and wall surface verticality flatness measuring method |
CN116379948B (en) * | 2023-02-13 | 2024-01-30 | 长江水利委员会长江科学院 | Large-range serial multi-point displacement meter suitable for surrounding rock large deformation |
CN116537273B (en) * | 2023-05-23 | 2024-04-16 | 中冶武勘工程技术有限公司 | Automatic deformation monitoring equipment for subway foundation pit and application method of automatic deformation monitoring equipment |
-
1993
- 1993-12-08 JP JP30827893A patent/JP2961144B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH07159163A (en) | 1995-06-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA1307129C (en) | Apparatus for the measurement and non-destructive material testing oflaid pipelines | |
US4719803A (en) | Borehole extensometer for monitoring relative mass displacements | |
US4542655A (en) | Borehole stress-meter and method and apparatus for the installation thereof | |
JP2961144B2 (en) | Multi-axis underground displacement meter | |
US5511429A (en) | Method and system for measuring three-dimensional displacement | |
US4327590A (en) | Method and apparatus for determining shifts at terrain and in structures | |
US4571848A (en) | Apparatus for measuring the transverse profile of a drill hole in a geologic formation | |
CN101245999B (en) | Non-excavated underground pipe line attitude angle measuring sensing head | |
US4607435A (en) | Temperature compensated extensometer | |
JP2004316117A (en) | Measuring device for face forward bedrock displacement and measuring method | |
US3600938A (en) | Stress relaxation gage | |
JP2018159221A (en) | Ground investigation method and penetrometer | |
CN112647966A (en) | Full automatic checkout device of long distance pipe jacking construction quality control | |
JP2007070827A (en) | Shield machine, and method of measuring tail clearance and/or dimension of internal space of segment tunnel | |
JP2966278B2 (en) | Soil measurement device | |
JP2981585B2 (en) | Discontinuous surface displacement measurement method and discontinuous surface displacement meter | |
JPH07180136A (en) | Control method in super high pressure injection soil improvement method | |
JP2831249B2 (en) | In-pipe flow meter jig | |
JP2620033B2 (en) | Tail clearance measuring device and tail clearance measuring method | |
WO1986006830A1 (en) | Borehole stress-meter and method and apparatus for the installation thereof | |
JPH0352315Y2 (en) | ||
JPH0338396B2 (en) | ||
JPH0455241B2 (en) | ||
McGrath et al. | Instrumentation for monitoring buried pipe behavior during backfilling | |
JP2023028773A (en) | Measurement system and measurement method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070806 Year of fee payment: 8 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080806 Year of fee payment: 9 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140806 Year of fee payment: 15 |
|
EXPY | Cancellation because of completion of term |