JP2880077B2 - Landslide meter - Google Patents
Landslide meterInfo
- Publication number
- JP2880077B2 JP2880077B2 JP6156108A JP15610894A JP2880077B2 JP 2880077 B2 JP2880077 B2 JP 2880077B2 JP 6156108 A JP6156108 A JP 6156108A JP 15610894 A JP15610894 A JP 15610894A JP 2880077 B2 JP2880077 B2 JP 2880077B2
- Authority
- JP
- Japan
- Prior art keywords
- landslide
- constant
- spring
- meter
- case
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、山岳地帯での地すべり
をその前兆から事前に察知するなど、土木工事又は防災
のために地盤の変位を測定する地すべり計に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a landslide meter for measuring a displacement of the ground for civil engineering work or disaster prevention, for example, detecting a landslide in a mountainous area from its precursor in advance.
【０００２】[0002]
【従来の技術】地すべり計には、坂田式地盤伸縮計や電
気式のものがある。これらは、地盤の変位量を正確に計
測し、自動的に記録できるものであるが、高価なために
汎用性が少ない。そこで、一般には、地すべり等の災害
を事前に察知できる程度の簡易な地すべり計が好んで使
用される。この簡易な地すべり計の従来のものは、地盤
の変位が予想される２定点へ垂直に立てた固定杭（傾斜
面などで、上方にある地すべりにより動かない杭）、移
動杭（固定杭に対し、地すべりにより動く杭）間にワイ
ヤー等を張架した構造を有する。このワイヤー等は、弛
むことなく、常に一定の張力を持って２定点間を結べる
ように、一端は移動杭に固定し、もう一端は錘等を取付
けて固定杭から垂らすようにしている。2. Description of the Related Art As a landslide meter, there are a Sakata type ground extensometer and an electric type. These can accurately measure the displacement of the ground and automatically record the displacement, but are less versatile due to their high cost. Therefore, generally, a simple landslide meter capable of detecting a disaster such as a landslide in advance is preferably used. Conventional simple landslide meters consist of fixed piles (pile that does not move due to a landslide above it on an inclined surface, etc.) and movable piles (for fixed piles) , Slidable by landslides). One end of the wire or the like is fixed to a movable pile, and the other end is attached to a weight or the like so that the wire or the like is attached to the fixed pile so that the wire can always be connected with a constant tension without loosening.
【０００３】前記ワイヤー等を張架する手段としては、
錘によるほか、バネやぜんまいを用いるものがある（た
とえば、特開昭６３−２７７９２８号）。こうした簡易
な地すべり計による地盤の変位は、張架したワイヤー等
の初期の長さと地盤変位後の長さとを、比較して、測定
する。地すべり等が予想される地盤の変位は通常１〜２
ｍｍ／月程度、地すべり等の前兆の場合には５ｍｍ／月
となる。このため、簡易な地すべり計においては、設置
後のワイヤー等の長さをメジャーで計測した初期値と地
すべり後のワイヤー等の長さをメジャーで計測した測定
値とを、比較して、変位量を測定する。[0003] As means for stretching the wire or the like,
Other than using a weight, there is a type using a spring or a mainspring (for example, Japanese Patent Application Laid-Open No. 63-277928). The displacement of the ground by such a simple landslide meter is measured by comparing the initial length of a stretched wire or the like with the length after the ground displacement. The displacement of the ground that landslides and the like are expected usually 1-2
mm / month, and 5 mm / month in the case of a precursor such as a landslide. Thus, in a simple landslide meter, the measured values measured by the measure of the length of wire, such as the initial value and after landslide the length of such wire was measured in major after installation, as compared, displaced Measure the amount.
【０００４】[0004]
【発明が解決しようとする課題】上記地すべり計におい
て、錘を使用した場合には、錘を外部からの影響を受け
ないようにするため、大きな覆いを設けたりする必要が
あるため、地すべり計が大型化するという問題点があ
る。また、バネやぜんまいを用いたものでは、ワイヤー
等の長さによって張力が変化したり、また、従来のバネ
やぜんまいは、比較的、外部の気温の影響を受けて特性
が変化するため、地盤の変位前後のワイヤー等の張架条
件が異なる結果、測定値の信頼性が低下する問題があ
る。In the above landslide meter, when a weight is used, it is necessary to provide a large cover to prevent the weight from being affected by the outside. There is a problem that the size is increased. In the case of using springs and springs, the tension changes depending on the length of the wire and the like, and the characteristics of conventional springs and springs change relatively under the influence of external temperature. There is a problem that the reliability of the measured value is reduced as a result of different tension conditions of the wire and the like before and after the displacement.
【０００５】こうしたワイヤー等を張架する地すべり計
で重要なのは、ワイヤー等が常に一定の張力を持って２
定点間を結べることである。これは、地盤の変位前後の
ワイヤーの張り具合を同じにして、同一の計測条件下で
正確な測定が行えるようにするためである。この理由か
ら、前記後者のバネやぜんまいを用いた地すべり計は好
ましくない。What is important in such a landslide meter that stretches a wire or the like is that the wire or the like always has a constant tension.
It is possible to connect between fixed points. This is to make the tension of the wire before and after the displacement of the ground the same, so that accurate measurement can be performed under the same measurement conditions. For this reason, the latter landslide meter using a spring or a spring is not preferable.
【０００６】そこで、地盤の変位から地すべり等の災害
を、事前に察知する地すべり計として、設置、撤去が簡
単な地すべり計を使用できるようにすることを目標とし
て、その取扱いを簡単にするため、小型化、簡素化を
目指し、より正確な計測を行い、確実に地すべり等の
災害の前兆を察知できるように、地盤の変位前後におけ
るワイヤー等の張り具合を同じにすることについて検討
した。In order to simplify the handling of a landslide meter which is easy to install and remove as a landslide meter for detecting in advance a disaster such as a landslide from ground displacement, The aim was to reduce the size and simplify the system, to make more accurate measurements, and to make the tension of the wires before and after the displacement of the ground the same so that the signs of landslides and other disasters could be reliably detected.
【０００７】[0007]
【課題を解決するための手段】その結果開発したもの
が、長尺の鋼製薄板を密着渦巻状にきつく巻いた定荷重
ぜんまいばね１の渦巻端１１をケース２内に固着し、こ
のケース２から定荷重ぜんまいばねの引出端１２を出入
自在にして、この引出端１２にインバール鋼線３２を連
結してなる地すべり計である。この地すべり計は、地す
べりが予想される２定点に立てた固定杭、移動杭に対
し、定荷重ぜんまいばねの内蔵するケースを固定杭に固
定し、インバール鋼線３２の鋼線端を移動杭に固定して
使用する。As a result, a spiral end 11 of a constant-load spring 1 in which a long steel thin plate is tightly wound in a tight spiral shape is fixed in a case 2. This is a landslide meter in which a draw-out end 12 of a constant-spring spring is made freely accessible and an invar steel wire 32 is connected to the draw-out end 12. This landslide meter fixes the case with built-in constant-spring spring to the fixed pile for fixed piles and movable piles set at two fixed points where landslides are expected, and connects the steel wire end of Invar steel wire 32 to the movable piles. Use fixed.
【０００８】インバール鋼はニッケルと鉄の合金で、熱
線膨張率が小さいのが特徴であり、一般的に、０〜４０
℃の範囲で、熱線膨張率１〜２×１０−６程度と合金中
では最も小さな値を示す。定荷重ぜんまいばねとは、ぜ
んまいの一種であるが、従来のぜんまいが粗に巻いた構
造であるのに対して、鋼製薄板を密着渦巻状にきつく巻
いた構造である点が異なっている。[0008] Invar steel is an alloy of nickel and iron, and is characterized by a low coefficient of linear thermal expansion.
Within the range of ° C., the coefficient of linear thermal expansion is about 1 to 2 × 10 −6 , which is the smallest value in the alloy. A constant-spring spring is a kind of a spring, but differs from a conventional spring in that it is roughly wound and a thin steel plate is tightly wound in a tight spiral.
【０００９】定荷重ぜんまいばね１には、メジャー１４
を引出端１２に連結し、定荷重ぜんまいばね１に沿わせ
てケース２から出入自在にするとよい。メジャーは、ケ
ース外からケース内を貫通させて引出端に連結させても
よいし、定荷重ぜんまいばねの鋼製薄板と共にケース内
に収納若しくは定荷重ぜんまいばねと共に巻き込んでも
よい。しかし、前者のように比較的しっかりした厚めの
直状メジャーをケース外に定荷重ぜんまいばね１と別個
に設けた方が使用には便利で正確さも出る。 [0009] In the constant force spiral spring 1, major 14
May be connected to the extraction end 12 so that it can freely enter and exit the case 2 along the constant-load spring 1 . Major may be allowed to penetrate the inside of the case from the outside of the case is connected to the lead-out end may involve with storage or constant force spiral spring in a case with steel sheet of the constant force spiral spring. However, it is relatively solid like the former
The straight measure is separated from the case by a constant load spring 1
Is more convenient and accurate to use.
【００１０】[0010]
【作用】本発明の地すべり計は、定荷重ぜんまいばね１
から引き出された長尺の鋼製薄板と、引出端１２に連結
したインバール鋼線３２とを合わせた部分が、従来の簡
易な地すべり計のワイヤー等に相当し、２定点間の地盤
の変位により変化する引出長さ（定荷重ぜんまいばね１
から引き出された鋼製薄板の長さ）を、この鋼製薄板に
沿わせて引き出されるメジャー１４から目視すること
で、測定することができる。地盤の変位量は、地すべり
前後の引出長さの差分となる。The landslide meter according to the present invention has a constant load spring 1
The long steel thin plate drawn from the wire and the invar steel wire 32 connected to the drawing end 12 are combined with a wire of a conventional simple landslide meter or the like, and the ground displacement between two fixed points Changing drawing length (constant load spring 1
The length of the steel sheet) drawn from, by visual observation from the major 14 drawn along a steel sheet of this can be measured. The amount of displacement of the ground is the difference between the withdrawal length before and after the landslide.
【００１１】インバール鋼線３２は、地すべり計を設置
した環境、特に気温の変化により伸長しないので、地す
べり前後の引出長さの差分、すなわち地盤の変位量を正
確に測定できるようになる。Since the invar steel wire 32 does not expand due to the environment in which the landslide meter is installed, especially due to a change in temperature, the difference between the length of the landslide before and after the landslide, that is, the amount of displacement of the ground can be accurately measured.
【００１２】定荷重ぜんまいばね１は、密着渦巻状にき
つく巻くことにより、従来のぜんまいに比べ、引出長
さの長短にかかわりなく、荷重が一定である、初期ぜ
んまい径の３０〜５０倍程度の引出長さが得られる、
円滑に作動し、摩擦が少ない、等の特性を有する。に
より、２定点間の長さに関係なくインバール鋼線３２を
引っぱる力が一定になるので地盤の変位前後で同一計測
条件で測定でき、により、地すべり計を小さなものに
することができ、により、微妙な地盤の変位にも正確
に反応する地すべり計を構成できるようになる。The constant-spring spring 1 is tightly wound in a tight spiral shape, so that the load is constant, regardless of the length of the drawn-out spring, and is about 30 to 50 times the initial diameter of the mainspring, compared to the conventional spring. Withdrawal length is obtained,
It operates smoothly and has little friction. Thereby, regardless of the length between the two fixed points, the force pulling the Invar steel wire 32 becomes constant, so that the measurement can be performed under the same measurement conditions before and after the displacement of the ground, whereby the landslide meter can be made smaller, This makes it possible to construct a landslide meter that accurately responds to subtle ground displacements.
【００１３】[0013]
【実施例】以下、図を参照しながら、本発明の地すべり
計についての実施例を説明する。図１は５０×３０×５
５ｍｍのケース２内に外径３０ｍｍの定荷重ぜんまいば
ね１を内蔵した地すべり計４の一部破断斜視図であり、
図２は同実施例を傾斜した地盤の２定点間に立てた固定
杭５１、移動杭５２間に架設した状態を表した側面図で
ある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a landslide meter of the present invention will be described below with reference to the drawings. Figure 1 is 50x30x5
FIG. 3 is a partially broken perspective view of a landslide meter 4 in which a constant-load mainspring spring 1 having an outer diameter of 30 mm is incorporated in a 5 mm case 2;
FIG. 2 is a side view showing a state where the embodiment is erected between a fixed pile 51 and a movable pile 52 erected between two fixed points on the inclined ground.
【００１４】本実施例は、図１に見られるように、幅１
０ｍｍ、長さ５０ｃｍの鋼製薄板を密着渦巻状にきつく
巻き、外径３０ｍｍの定荷重ぜんまいばね１（大阪熱処
理株式会社製 商品名：コプリング、引張荷重５ｋｇ）
としている。この定荷重ぜんまいばね１は、渦巻端１１
を左右に分割可能なケース２内の中心軸２１へ連結し、
ケース２上縁の短手側から引出端１２を引き出せるよう
にしている。インバール鋼線３２は、Ｎｉ３６％、Ｆｅ
６４％のインバール鋼を線状に約２ｍほどに引き延ばし
たもので、前記引出端１２に連結している。In the present embodiment, as shown in FIG.
A 0-mm, 50-cm-long steel sheet is tightly wound in tight spirals, and has a constant-load spring spring 1 with an outer diameter of 30 mm (trade name: Coupling, tensile load 5 kg, manufactured by Osaka Heat Treatment Co., Ltd.)
And This constant-load spring 1 has a spiral end 11.
To the center shaft 21 in the case 2 which can be divided into right and left,
The draw-out end 12 can be pulled out from the short side of the upper edge of the case 2. Invar steel wire 32 is composed of 36% Ni, Fe
A 64% invar steel is linearly elongated to about 2 m, and is connected to the extraction end 12.
【００１５】この定荷重ぜんまいばね１は、既成品であ
る前記商品名コプリングを使用しており、鋼製薄板上に
は目盛は形成されていない。そこで、本実施例では、引
出端１２を引き出したケース２上縁短手側の対抗位置か
らケース２にメジャー１４を貫通させ、メジャー１４の
貫通させた端部を引出端１２に連結して、メジャー１４
を定荷重ぜんまいばね１に沿わせてケース２から出入自
在にすることで、地すべり計４の引出長さを測定するこ
とができる。The constant-load spring 1 uses the above-mentioned copling, which is an off-the-shelf product, and has no scale formed on a steel thin plate. Therefore, in the present embodiment, the measure 14 is made to penetrate the case 2 from the position opposite to the short side of the upper edge of the case 2 from which the draw end 12 is drawn, and the penetrated end of the measure 14 is connected to the draw end 12. Major 14
Can be moved in and out of the case 2 along the constant-load spring 1 so that the length of the landslide meter 4 can be measured.
【００１６】このように、定荷重ぜんまいばね１とメジ
ャー１４とに、それぞれ既成品を利用することにより、
地すべり計４の製造コストを大幅に削減することができ
る。また、こうして定荷重ぜんまいばね１とメジャー１
４とは分離可能であることから、個別に交換できること
になるので、修理などのメンテナンスが容易で、そのメ
ンテナンス費用も低く抑えることができる。As described above, by using the off-the-shelf products for the constant-load spring 1 and the measure 14, respectively.
The manufacturing cost of the landslide meter 4 can be greatly reduced. Also, the constant load spring 1 and the measure 1
4 can be separated and replaced individually, so that maintenance such as repair is easy and the maintenance cost can be kept low.
【００１７】本実施例では、定荷重ぜんまいばね１の引
出端１２には、２枚の固定片３，３を挟着し、この固定
片３，３を貫通する孔３１に、インバール鋼線３２を結
びつけている。移動杭５２へは釘などを打ち立て、この
インバール鋼線３２のもう一方の端部、鋼線端３３を結
びつける。また、ケース２底面には、２個ずつの孔２
２，２２を貫通させた取付片２３，２３を両側それぞれ
に設けてあり、この孔２２，２２を通して釘、ねじ等を
固定杭に打ち、固定する。In the present embodiment, two fixed pieces 3 and 3 are sandwiched between the drawing end 12 of the constant-load spring 1 and a hole 31 passing through the fixed pieces 3 and 3 is provided with an invar steel wire 32. Is tied. A nail or the like is set up on the moving pile 52, and the other end of the invar steel wire 32 and the steel wire end 33 are connected. The bottom of the case 2 has two holes 2 each.
Mounting pieces 23, 23 penetrating through the holes 2, 22 are provided on both sides, and nails, screws, etc. are punched into the fixed piles through the holes 22, 22, and fixed.
【００１８】こうした形状を有する地すべり計４は、地
すべりが予想される傾斜した地盤５３の２定点間に立て
た固定杭５１、移動杭５２間に架設する。例えば、図２
に見られるように、ケース２底面を固定杭５１に釘で固
定し、インバール鋼線３２の鋼先端３３を移動杭５２に
固定する。この時、ケース２から引出された定荷重ぜん
まいばね１の引出長さが、初期値となる。以後、地すべ
り後の引出長さの測定値とこの初期値との差分が地盤の
変位量となる。The landslide meter 4 having such a shape is installed between a fixed pile 51 and a movable pile 52 erected between two fixed points of the inclined ground 53 where a landslide is expected. For example, FIG.
As shown in FIG. 7, the bottom of the case 2 is fixed to the fixed pile 51 with a nail, and the steel tip 33 of the Invar steel wire 32 is fixed to the movable pile 52. At this time, the withdrawal length of the constant-load spring 1 pulled out of the case 2 becomes the initial value. Thereafter, the difference between the measured value of the withdrawal length after the landslide and this initial value is the displacement amount of the ground.
【００１９】図２からわかるように、本発明の地すべり
計４を設置した状態は簡素で、従来のように、引出長さ
を計測するための特別な装置やケース下端に見られた錘
やその錘のための覆いなどの附属物がないのが特徴であ
る。そのため、設置の際の労力が少ないだけでなく、設
置作業に要する時間、手間も少なくて済む。また、イン
バール鋼３２は外界の変化からの影響を受けにくく、ま
た定荷重ぜんまいばね１は引出長さの長短により引っ張
り強さが変化しないので、長期にわたる地盤の変位の測
定でも、常に同一条件で測定、より正確な変位量を算出
できる。As can be seen from FIG. 2, the state in which the landslide meter 4 of the present invention is installed is simple, and a special device for measuring the length of the drawer, a weight seen at the lower end of the case, and the like, as in the prior art. The feature is that there is no accessory such as a cover for the weight. Therefore, not only the labor at the time of installation is small, but also the time and labor required for the installation work are reduced. Further, since the invar steel 32 is hardly affected by changes in the external world, and the tensile strength of the constant-load spring 1 does not change depending on the length of the drawn-out length, the same conditions are always used even when measuring the displacement of the ground over a long period of time. Measurement and more accurate displacement can be calculated.
【００２０】図３は、図２の状態から地すべりが生じ、
地すべり計４の引出長さが初期値に比べ長くなった状態
を表した図２相当図である。図２及ぶ図３を比較してわ
かるように、２定点間に架設した地すべり計４は、定荷
重ぜんまいばね１の特性により、常に一定の張力を持っ
て張られている。地すべり等が予想される地盤５３は、
通常でも１〜２ｍｍ／月程度の変位があるが、地すべり
等の可能性が高くなると、変位は５ｍｍ／月となる。よ
って、定期的に計測した引出長さの初期値との差分が５
ｍｍ／月を超えたときには、地すべりの前兆と見てよ
い。FIG. 3 shows that a landslide occurs from the state of FIG.
FIG. 3 is a diagram corresponding to FIG. 2, showing a state in which a drawout length of a landslide meter 4 is longer than an initial value. As can be seen by comparing FIGS. 2 and 3, the landslide meter 4 installed between two fixed points is always stretched with a constant tension due to the characteristics of the constant load spring 1. The ground 53 where landslides are expected,
Normally, there is a displacement of about 1 to 2 mm / month, but when the possibility of landslide or the like increases, the displacement becomes 5 mm / month. Therefore, the difference between the regularly measured withdrawal length and the initial value is 5%.
When it exceeds mm / month, it can be regarded as a precursor of a landslide.
【００２１】こうした地盤の変位の測定によって、より
正確に地すべりの兆候等を調べるには、固定杭、移動杭
をそれぞれ１対多若しくは多対１又は多対多の関係で配
し、それぞれの固定杭又は移動杭間に本発明の地すべり
計を架設すればよい。図４には、本実施例の地すべり計
４を、１本の固定杭５１から水平方向の異なる３本の移
動杭５２，５２，５２へ架設した状態を示す。このよう
に複数の地すべり計を配することにより、定期的に計測
した各地すべり計の引出長さから地盤の変位の分布図を
得て、より正確に地すべりの兆候を察知することができ
るようになる。このほか、前記とは逆に下り側の杭から
複数の地すべり計を架設したり、設置の容易な点を活か
し、複数の地すべり計を個別に配置したりすることもで
きる。In order to more accurately examine the signs of a landslide or the like by measuring the displacement of the ground, a fixed pile and a movable pile are arranged in a one-to-many or a many-to-one or a many-to-many relationship, and each of the fixed piles and the moving piles is fixed. The landslide meter of the present invention may be installed between the pile or the moving pile. FIG. 4 shows a state in which the landslide meter 4 of this embodiment is erected from one fixed pile 51 to three moving piles 52, 52, 52 having different horizontal directions. By arranging a plurality of landslide meters in this way, it is possible to obtain a distribution map of ground displacement from the drawing length of each landslide meter periodically measured, so that signs of landslide can be more accurately detected. Become. In addition, contrary to the above, a plurality of landslide meters can be erected from the pile on the downside, or a plurality of landslide meters can be individually arranged by taking advantage of easy installation.
【００２２】[0022]
【発明の効果】本発明の地すべり計は、従来のものに比
べて構造が極めて簡単であるため、設置、撤去が非常に
簡単になり、その労力や手間が大幅に削減される。取扱
いについても、小型化、簡素化されているため取扱いや
すい。単体のコストも削減できるだけでなく、定荷重ぜ
んまいばねとメジャーとを分離することで部品交換等の
メンテナンスコストも下げることができ、経済的であ
る。 According to the present invention, the landslide meter is compared with the conventional one.
All are extremely simple to install and remove.
It will be simpler and its labor and effort will be greatly reduced. handling
Are smaller and more simplified,
I'm sorry. Not only can the cost of a single unit be reduced, but also the constant load
Separating the spring and the measure allows parts replacement etc.
The maintenance cost can be reduced and it is economical .
【００２３】また、使用上においても、目的である地盤
の変位を計測又は観測することが、従来のワイヤーを使
用した地すべり計よりも正確に、しかも簡単に行うこと
ができる。更に、同一の杭から複数の杭へ定荷重ぜんま
いばねをかけ渡すように、複数の同時設置が容易に行え
るので、、地盤の変位をより正確に把握することがで き
るようになり、地すべりの前兆もそれだけ正しく判断す
ることができるようになる。 Also, in use, the ground
Measuring or observing the displacement of
More accurate and easier than the landslide meter used
Can be. In addition, constant load balance from the same pile to multiple piles
Multiple simultaneous installations can be performed easily, as if passing over a spring.
Ki de it possible to more accurately grasp the displacement of Runode ,, ground
Landslide warning signs
Will be able to
【００２４】このほか、定荷重ぜんまいばねに沿わせた
メジャーの目盛を観測員が黙視をするだけでなく、メジ
ャーが従来のワイヤー等に比べて幅広で視認性に優れて
いる点から、各種の自動測定装置を本発明の地すべり計
に加えることができる。例えば、目盛を自動的、定期的
に撮影したり、目盛の代わりに設けた小孔、切欠を光セ
ンサで計測し、磁気記録しておく、等である。こうして
自動測定を可能にすると、更に観測員派遣の費用等を削
減することができる。In addition to the above, a constant load spring is used.
Not only does the observer silently look at the scale of the major,
The wire is wider and has better visibility than conventional wires, etc.
From the point that various automatic measuring devices are used in the landslide meter of the present invention.
Can be added to For example, you can set the scale automatically,
The small holes and notches provided in place of the scales
Measurement with a sensor and magnetic recording. In this way
If automatic measurement is enabled, the cost of dispatching observers can be further reduced.
Can be reduced .
【図面の簡単な説明】[Brief description of the drawings]
【図１】定荷重ぜんまいばねに目盛を有さない地すべり
計の一部破断斜視図である。FIG. 1 is a partially broken perspective view of a landslide meter having no scale on a constant-load spring.
【図２】同実施例を２定点間に立てた杭に架設した状態
を表した側面図である。FIG. 2 is a side view showing a state where the embodiment is erected on a pile set between two fixed points.
【図３】地すべりが生じた状態を表した図２相当図であ
る。FIG. 3 is a diagram corresponding to FIG. 2, showing a state in which a landslide has occurred.
【図４】１本の固定杭から３本の移動杭へ地すべり計を
架設した斜視図である。FIG. 4 is a perspective view in which a landslide meter is installed from one fixed pile to three movable piles.
１ 定荷重ぜんまいばね ２ ケース １１ 渦巻端 １２ 引出端 １４ メジャー DESCRIPTION OF SYMBOLS 1 Constant load spring 2 Case 11 Spiral end 12 Pull-out end 14 Measure
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G01D 21/00 E02D 17/20 Continuation of front page (58) Field surveyed (Int.Cl. 6 , DB name) G01D 21/00 E02D 17/20
Claims (1)
いた定荷重ぜんまいばね１の渦巻端１１をケース２内に
固着し、該ケース２から該定荷重ぜんまいばねの引出端
１２を出入自在にして、該引出端１２に対し定荷重ぜん
まいばね１に添わせて無荷重状態でケース２から出入自
在にメジャー１４を連結すると共に、該引出端１２にイ
ンバール鋼線３２を連結してなる地すべり計。1. A spiral end 11 of a constant-load spiral spring 1 in which a long steel thin plate is tightly wound in a tight spiral shape is fixed in a case 2, and a withdrawal end 12 of the constant-load spiral spring from the case 2. The measure 14 is connected to the draw-out end 12 so as to be able to move in and out of the case 2 in a no-load state with the constant load spring 1 attached to the draw-out end 12, and an Invar steel wire 32 is connected to the draw-out end 12. A landslide meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6156108A JP2880077B2 (en) | 1994-07-07 | 1994-07-07 | Landslide meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6156108A JP2880077B2 (en) | 1994-07-07 | 1994-07-07 | Landslide meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0821750A JPH0821750A (en) | 1996-01-23 |
| JP2880077B2 true JP2880077B2 (en) | 1999-04-05 |
Family
ID=15620491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6156108A Expired - Fee Related JP2880077B2 (en) | 1994-07-07 | 1994-07-07 | Landslide meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2880077B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100689268B1 (en) * | 2006-09-15 | 2007-03-09 | 주식회사 한국종합기술 | Sliding measuring apparatus of causeway |
| JP5363048B2 (en) * | 2008-08-20 | 2013-12-11 | Ｊｆｅスチール株式会社 | Measurement method of accumulated strain in roadbed |
| JP5389197B2 (en) * | 2012-01-27 | 2014-01-15 | 中国電力株式会社 | Ground displacement simple measurement device |
| CN107561246B (en) * | 2017-09-29 | 2020-07-14 | 中冶交通建设集团有限公司 | Landslide model test device |
| CN109056853B (en) * | 2018-08-02 | 2019-09-17 | 中国地质大学（武汉） | A kind of mechanism of telescopic measurement landslide big displacement |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53113573A (en) * | 1977-03-15 | 1978-10-04 | Sharp Corp | Electronic scale |
| JPS54113905A (en) * | 1978-02-27 | 1979-09-05 | Nippon Douro Koudan | Landslippbreaking monitor device in huge slope face |
-
1994
- 1994-07-07 JP JP6156108A patent/JP2880077B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0821750A (en) | 1996-01-23 |
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