JPS6263821A - Sand-surface meter - Google Patents

Sand-surface meter

Info

Publication number
JPS6263821A
JPS6263821A JP20184185A JP20184185A JPS6263821A JP S6263821 A JPS6263821 A JP S6263821A JP 20184185 A JP20184185 A JP 20184185A JP 20184185 A JP20184185 A JP 20184185A JP S6263821 A JPS6263821 A JP S6263821A
Authority
JP
Japan
Prior art keywords
sand
transmitter
hollow tube
controller
receiver
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
Application number
JP20184185A
Other languages
Japanese (ja)
Other versions
JPH0535810B2 (en
Inventor
Kaoru Kimura
薫 木村
Keitarou Hayabuchi
敬太郎 早渕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ohbayashi Gumi Ltd
Obayashi Corp
Original Assignee
Ohbayashi Gumi Ltd
Obayashi Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ohbayashi Gumi Ltd, Obayashi Corp filed Critical Ohbayashi Gumi Ltd
Priority to JP20184185A priority Critical patent/JPS6263821A/en
Publication of JPS6263821A publication Critical patent/JPS6263821A/en
Publication of JPH0535810B2 publication Critical patent/JPH0535810B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

PURPOSE:To execute a measurement with a high accuracy by providing a transmitter and a leg part on an instrument body, providing a receiver on a hollow tube, and detecting a sand-surface by turning on and off a ratio wave signal. CONSTITUTION:A hollow tube 10 is interpenetrated into a prescribed depth of a ground, and thereafter, when said is thrown into the tube from a hopper 20 a winch is wound down by a controller 38, and a device body 14 descends downward. When a ring frame 54 of a leg part 52 is seated on the sane-surface, a tare weight of the body 14 works against an energizing force of a coil spring 64, and an interval between a stopper 56 and a leg plate 58 is narrowed. A limit switch 46 becomes an on-state, a transmitter 42 works, a transmitter 42 is operated, and sends out a radio wave signal to a transmitting antenna 40. Its signal is received by a receiving antenna 16, and outputted to the controller 38 through a receiver 18. The controller 38 outputs a measured value of a rotary encoder 36 which is interlocked with the winch 34 to a pen recorder 66 and prints it. In this way, a measurement is executed with a high accuracy.

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は砂面計に関し、特に砂杭造成用の中空管内で
の砂面の検知に用いられるものに関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sand level meter, and particularly to one used for detecting the sand level in a hollow pipe for constructing sand piles.

(従来技術) 従来より、軟弱地盤の地盤を改良する目的で、地盤中に
砂を埋め込み、これに振動・衝撃を加え締固めて砂杭を
形成するいわゆるサンドコンパクション工法が提供され
ている。
(Prior Art) Conventionally, for the purpose of improving soft ground, a so-called sand compaction method has been provided in which sand is buried in the ground and compacted by applying vibrations and shocks to form sand piles.

サンドコンパクション工法は、通常中空の管状体を地盤
中に貫入し、この中空管内に所定量の砂を投入し、中空
管を若干持ち上げて、その先端から外部に砂を排出し、
中空管に振動・衝撃を加えて締固め、砂杭の一部を造成
し、このようなサイクルを順次繰り返すことで所定長の
砂杭を造成していた。
The sand compaction method usually involves penetrating a hollow tubular body into the ground, putting a predetermined amount of sand into the hollow tube, lifting the hollow tube slightly, and discharging the sand from its tip to the outside.
A part of the sand pile was created by applying vibration and shock to the hollow pipe to compact it, and by repeating this cycle sequentially, a sand pile of a predetermined length was created.

この場合、中空管内から排出される砂の量は、砂杭の締
固め強度などを算出するために必要な計測項目であって
、通常排出のft11における中空管内の砂面位置を測
定する砂面計によってこれを検知している。
In this case, the amount of sand discharged from the inside of the hollow pipe is a measurement item necessary to calculate the compaction strength of the sand pile, and the sand surface that measures the position of the sand surface inside the hollow pipe at ft11 during normal discharge. This is detected by the meter.

この種の砂面計測に用いられる砂面計としては、例えば
中空管内に金II製の極板を吊り下げて、この極板と中
空管との間に一定の電圧を加えておき、極板と中空管間
の抵抗変化を利用して砂面を検知する手段が提供されて
いる。
A sand level meter used for this type of sand surface measurement is, for example, a gold II electrode plate suspended inside a hollow tube, and a constant voltage is applied between the electrode plate and the hollow tube. A means is provided for detecting the sand surface using the resistance change between the plate and the hollow tube.

この砂面計は、極板と中空管との間に空気が介在する場
合と砂あるいは水を含んだ砂が介在する場合の電気抵抗
の変化を検知して砂面を測定するものであるが、次のよ
うな問題があった。
This sand level meter measures the sand level by detecting changes in electrical resistance when air is present between the electrode plate and the hollow tube, and when sand or water-containing sand is present. However, there were the following problems.

(発明が解決しようとするWR題点) 上記した従来の砂面計では、極板は錘等を固着して電気
コードを接続して中空管内に垂直に吊り下げられるが、
砂の投入によってこの接続部分が切断される恐れがある
上に、極板が大きく揺れて中空管と接触し誤動作を生じ
ることもあった。
(WR problem to be solved by the invention) In the above-mentioned conventional sand level meter, the electrode plate is suspended vertically inside a hollow tube by fixing a weight or the like and connecting an electric cord.
Not only was there a risk that this connection would be severed by the addition of sand, but the electrode plates could also shake so much that they would come into contact with the hollow tube, causing malfunctions.

また、砂の投入によってこれが極板に耐着し測定感度が
低下するという欠点もあった。
Another disadvantage was that the addition of sand caused it to adhere to the electrode plates, resulting in a decrease in measurement sensitivity.

そこで、例えば超音波の砂面からの反射を利用して、非
接触方式で砂面の検出をすることも考えられるが、音波
を利用する場合には、中空管に衝撃・振動を加える起振
機や、周囲の騒音が雑音となり正確な測定が困難になる
Therefore, it is possible to detect the sand surface using a non-contact method, for example, by using the reflection of ultrasonic waves from the sand surface, but when using sound waves, shocks and vibrations are applied to the hollow tube. The vibration machine and surrounding noise create noise, making accurate measurements difficult.

この発明は、上述した如き従来の問題点に鑑みてなされ
たものであって、その目的とするところは、測定精度の
高い砂面計を提供することにある。
This invention has been made in view of the conventional problems as described above, and its purpose is to provide a sand level meter with high measurement accuracy.

(問題点を解決するための手段) 上記目的を達成するため、この発明は、吊下郁測定器を
介して砂抗造成用中空管に吊1ζされ、上端に突設され
た送信アンブナと下端に突設されtc脚部とを備えIζ
装置本体と、該装置本体内に内蔵された送信器と該脚部
の砂面上への着座によって作動されるスイッチ手段と、
該中空管の上端側に設けられ受信アンテナを備えた受信
器とを有し、該スイッチ手段の作動により該送信器から
の電波信号を送信アンテナを介して受信器で受け、この
受信信号によって該吊F匿測定器を制御し、該装置本体
の吊下量から該中空管内の砂面を検知してなることを特
徴とする。
(Means for Solving the Problems) In order to achieve the above object, the present invention has a transmitting amp that is suspended from a hollow pipe for sand tunnel construction through a hanging measuring device, and is provided with a transmitting amp that is protruded from the upper end. It is provided with a tc leg part protruding from the lower end.
a device main body, a transmitter built into the device main body, and a switch means activated by seating the leg on the sand surface;
a receiver provided at the upper end of the hollow tube and equipped with a receiving antenna; when the switch means is actuated, the receiver receives a radio wave signal from the transmitter via the transmitting antenna; The present invention is characterized in that the suspended F-accumulation measuring device is controlled to detect the sand surface within the hollow tube from the suspended amount of the device main body.

(実施例及び作用) 以下、この発明の好適な実施例について添附図面を参照
にして詳細に説明り゛る。
(Embodiments and Effects) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

第1図および第2図は、この発明に係る砂面轟1の一実
施例を示している。
FIG. 1 and FIG. 2 show an embodiment of a sand-faced blower 1 according to the present invention.

同図に示す砂面計は、第1図に−その全体構成を・示す
ように、地盤中に貫入される砂杭造成用の中空管10内
に、ワイヤー12によって吊下された装置本体14と、
中空管10内の上端に設けられた受信アンテナ16を備
えた受信器18とを有している。
The sand level gauge shown in the same figure is, as shown in FIG. 14 and
The receiver 18 includes a receiving antenna 16 provided at the upper end of the hollow tube 10.

上記中空管10の上端には、その内部に砂を投入するた
めのホッパー20を有する連結器22を介して、振動・
衝撃を中空管10に加える起振機24が装着されている
At the upper end of the hollow tube 10, vibration and
An exciter 24 is attached to apply an impact to the hollow tube 10.

上記装置本体14は、第2図にも示すように、下端が開
口した吊鐘状のケース26と、この開口を開基する蓋体
28とを有し、ケース26の上端に突設された吊り金具
30と複数のシーブ32を介して、連結器22上に設け
られたウィンチ34に捲回されたワイヤー12によって
吊り下げられている。
As shown in FIG. 2, the device main body 14 has a bell-shaped case 26 with an open bottom end, a lid body 28 that opens the opening, and a hanging bell-shaped case 26 that is protruding from the top end of the case 26. It is suspended by a wire 12 wound around a winch 34 provided on the coupler 22 via a metal fitting 30 and a plurality of sheaves 32.

そして、装置本体14の吊下量は、ウィンチ34と同期
回転するロータリーエンコーダ36によって計測され、
その出力は受信器18に接続された制御器38に入力さ
れる。
The hanging amount of the device main body 14 is measured by a rotary encoder 36 that rotates in synchronization with the winch 34.
Its output is input to a controller 38 connected to the receiver 18.

また、つ1インチ34による装置本体14の上下動もυ
1t[l器38によってコントロールされる。
In addition, the vertical movement of the device body 14 by the 1 inch 34 is also υ
It is controlled by the 1t[l unit 38.

上記装置本体14のケース26の下端には、棒状の送信
アンブナ40が突設されるとともに、その内部にはケー
ス26の一側に固設された送信器42と、ケース26の
他側に固設された電池電源44と、蓋板28の中心部に
立設されたリミツ1〜スイッチ46とが収納されていて
、これらはリード線48でそれぞれ接続されるとともに
、送信器42の一端から延長された1本のリード線48
はケース26の上端に穿設された透孔50を挿通して、
前記送信アンブナ40に接続されている。
A rod-shaped transmitting antenna 40 is protruded from the lower end of the case 26 of the device main body 14, and inside thereof is a transmitter 42 fixed to one side of the case 26 and a transmitter 42 fixed to the other side of the case 26. A battery power source 44 provided therein and a limit 1 to a switch 46 provided upright in the center of the cover plate 28 are housed, and these are connected by lead wires 48 and extended from one end of the transmitter 42. One lead wire 48
is inserted through the through hole 50 bored at the upper end of the case 26,
It is connected to the transmitting antenna 40.

一方、蓋板28の下方には脚部52が突設されている。On the other hand, a leg portion 52 is provided projecting below the lid plate 28.

脚部52は、最下端に位置し、中空管10内の砂面上に
着座するリングフレーム54と、蓋板28の下面に突設
されたストッパー56のF端に対向する脚板58とを、
下方に向(プて拡開するように傾斜した複数の連結フレ
ーム60とで結合したものである。リングフレーム54
は、砂面と環状に接触するため受圧部が大きく、着座し
た際に脚部52が砂面下にもぐり込むことを防止する。
The leg portion 52 includes a ring frame 54 located at the lowest end and seated on the sand surface inside the hollow tube 10, and a leg plate 58 facing the F end of a stopper 56 protruding from the lower surface of the lid plate 28. ,
The ring frame 54 is connected to a plurality of connecting frames 60 that are inclined to expand downward.
The pressure-receiving portion is large because it contacts the sand surface in an annular shape, and prevents the leg portions 52 from sinking under the sand surface when seated.

そして、脚部52は、蓋板28と脚板58とをそれぞれ
貫通する複数のボルト62によって結合され、且つ、各
ボルト62の外周に装着されたコイルバネ64の付勢力
によって、ストッパー56の下端と脚板58の上端間は
、所定の間隔を保持している。
The leg portion 52 is connected by a plurality of bolts 62 passing through the lid plate 28 and the leg plate 58, and is connected to the lower end of the stopper 56 by the biasing force of a coil spring 64 attached to the outer periphery of each bolt 62. A predetermined distance is maintained between the upper ends of 58.

上記リミットスイッチ46の作動部46aは、蓋板28
を貫通するようにして下方に突出し、その下端は脚板5
8の上面に当接しており、この状態ではスイッチ46は
オフ状態になっている。
The operating portion 46a of the limit switch 46 is connected to the cover plate 28.
protrudes downward so as to pass through the leg plate 5, and its lower end is connected to the leg plate 5.
In this state, the switch 46 is in an off state.

また、上記コイルバネ64は装置本体14が、中空管1
0内に吊下げられて砂面に着地していない状態の時、起
振機24による起振力によって、リングフレーム54が
押上げられて、リミットスイッチ46の作動部46aが
上昇してオン状態にならない様に、バネ定数が設定され
ている。
Further, the coil spring 64 is connected to the device body 14 when the hollow tube 1
When the ring frame 54 is suspended in the sand and has not landed on the sand surface, the ring frame 54 is pushed up by the vibration force generated by the vibration exciter 24, and the actuating portion 46a of the limit switch 46 is raised to the ON state. The spring constant is set so that this does not occur.

以上のように構成された砂面計では、次のようにして中
空管10内の砂面を検知する。
The sand level meter configured as described above detects the sand level within the hollow tube 10 in the following manner.

まず、中空管10を地盤の所定深度まで貫入した後、ホ
ッパー20から管内に砂が投入されると、制yA538
によりウィンチ34が巻下げられ、装置本体14が下方
に降下する。
First, after penetrating the hollow pipe 10 to a predetermined depth in the ground, sand is introduced into the pipe from the hopper 20, and the control yA538
As a result, the winch 34 is lowered and the device main body 14 is lowered.

そして、脚部52のリングフレーム54が、砂面上に着
座すると、コイルバネ64の付勢力に抗して装置本体1
4の自重が作用し、て、ストッパー56と脚板58との
間隔をせばめる。
When the ring frame 54 of the leg portion 52 is seated on the sand surface, the device body 1 resists the biasing force of the coil spring 64.
4 acts, thereby narrowing the distance between the stopper 56 and the leg plate 58.

これによりリミットスイッチ46がオン状態となり、送
信器42が作動して、送信アンテナ40に電波信号を送
出する。
This turns on the limit switch 46, activates the transmitter 42, and sends out a radio signal to the transmitting antenna 40.

送信アンテナ40から放出された信号は、その上方にあ
る受信アンテナ16で受lJ1受信器18を介して制御
器38に出力され、制till器38ではこの出力信号
を受けて、ウィンチ34に連動したロータリーエンコー
ダ36の計測値を、例えばペンレコーダー66に出力し
て打点する。
The signal emitted from the transmitting antenna 40 is output to the controller 38 via the receiver 18 at the receiving antenna 16 located above it, and the till controller 38 receives this output signal and operates in conjunction with the winch 34. The measured value of the rotary encoder 36 is outputted to, for example, a pen recorder 66 for dotting.

この一連の作動により、ロータリーエンコーダ36が常
時装置本体14の吊下量を計測しているため、ペンレコ
ーダー66に出力された値は、リングフレーム54が着
座した時の砂面の値を示すことになる。
Through this series of operations, the rotary encoder 36 constantly measures the hanging amount of the device main body 14, so the value output to the pen recorder 66 indicates the value of the sand surface when the ring frame 54 is seated. become.

つまり、ロータリーエンコーダ36は、ウィンチ34と
連動していて、装置本体14の吊下されている位置を常
に示しているが、リングフレーム60が砂面上に着座し
た時のみの値を出力するように制御される。
In other words, the rotary encoder 36 is linked to the winch 34 and always indicates the suspended position of the device body 14, but it outputs a value only when the ring frame 60 is seated on the sand surface. controlled by.

一方、制御器38が受信器18からの受信信号を受ける
と同時に、制御器38からウィンチ34に信号が送られ
、装置本体14はこれにより巻き上げられ、リングフレ
ーム54は砂面から離間するとともに、所定の時間、例
えば数秒経過すると、再びυJi2!!器38からウィ
ンチ34の巻き下げ信号が出され、装置本体14が降下
してリングフレーム54が砂面上に着座して、上述した
一連の作動が行なわれて、この時点の砂面がペンレコー
ダー66に打点される。
On the other hand, at the same time as the controller 38 receives the reception signal from the receiver 18, a signal is sent from the controller 38 to the winch 34, the main body 14 of the device is thereby hoisted, the ring frame 54 is separated from the sand surface, and After a predetermined period of time, for example several seconds, υJi2! ! A lowering signal for the winch 34 is issued from the device 38, the device body 14 is lowered, the ring frame 54 is seated on the sand surface, the above-mentioned series of operations are performed, and the sand surface at this point is recorded as a pen recorder. He was batted at 66.

以後は上述した作動の繰り返しによって、間欠的に砂面
の計測を行ない、ペンレコーダー66の打点を結ぶと、
砂面の経時的な変化を計測ないしは記録することができ
る。
After that, by repeating the above-mentioned operation, the sand surface is measured intermittently and the dots of the pen recorder 66 are connected.
Changes in the sand surface over time can be measured or recorded.

(発明の効果) 以上、実施例で詳細に説明したように、本発明に係る砂
面計にあっては、電波信号のオン−オフによりで砂面を
検知するため、従来の極板を用いる場合のように、電気
コードの切断や砂の付着によって精度が低下することが
なく、また超音波のように周囲の騒音 によって影響を受けず高精度の測定ができる。
(Effects of the Invention) As described above in detail in the embodiments, the sand level meter according to the present invention uses a conventional electrode plate to detect the sand level by turning on and off radio signals. Unlike the conventional method, accuracy does not deteriorate due to cutting of electrical cords or adhesion of sand, and unlike ultrasonic waves, high-precision measurements can be made without being affected by surrounding noise.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明に係る砂面計の全体構成図、第2図は第
1図の要部拡大所面図である。 10・・・中空管    12・・・ワイヤー14・・
・装置本体   16・・・受信アンテナ18・・・受
信器    20・・・ホッパー22・・・連結器  
  24・・・起振器26・・・ケース    28・
・・蓋 板30・・・吊り金具   32・・・シーブ
34・・・ウィンチ   36・・・ロータリーエンコ
ーダ38・・・ili制御器40・・・送信アンテナ4
2・・・受Fs 器44・・・電池電源46・・・リミ
ットスイッチ 48・・・リード線50・・・透 孔 
   52・・・脚 部54・・・リングフレーム 5
6・・・ストッパー58・・・脚 板    6o・・
・連結フレーム62・・・ボルト    64・・・コ
イルバネ特許出願人     株式会社 大 林 組成
 理 人     弁理士 −色 健 補第1図
FIG. 1 is an overall configuration diagram of a sand level gauge according to the present invention, and FIG. 2 is an enlarged view of the main parts of FIG. 1. 10...Hollow tube 12...Wire 14...
・Device body 16...Receiving antenna 18...Receiver 20...Hopper 22...Coupler
24... Exciter 26... Case 28.
... Lid plate 30 ... Hanging fittings 32 ... Sheave 34 ... Winch 36 ... Rotary encoder 38 ... ILI controller 40 ... Transmission antenna 4
2...Fs receiver 44...Battery power source 46...Limit switch 48...Lead wire 50...Through hole
52... Leg portion 54... Ring frame 5
6... Stopper 58... Leg plate 6o...
・Connection frame 62...Bolt 64...Coil spring patent applicant Obayashi Co., Ltd., patent attorney - Iro Ken Supplementary Figure 1

Claims (1)

【特許請求の範囲】[Claims] 吊下量測定器を介して砂抗造成用中空管に吊下され、上
端に突設された送信アンテナと下端に突設された脚部と
を備えた装置本体と、該装置本体内に内蔵された送信器
と該脚部の砂面上への着座によって作動されるスイッチ
手段と、該中空管の上端側に設けられ受信アンテナを備
えた受信器とを有し、該スイッチ手段の作動により該送
信器からの電波信号を送信アンテナを介して受信器で受
け、この受信信号によって該吊下量測定器を制御し、該
装置本体の吊下量から該中空管内の砂面を検知してなる
ことを特徴とする砂面計。
A device body is suspended from a hollow pipe for sand dungeon construction via a hanging amount measuring device, and includes a transmitting antenna protruding from the upper end and legs protruding from the lower end; It has a built-in transmitter, a switch actuated by seating the leg on the sand surface, and a receiver provided at the upper end of the hollow tube and equipped with a receiving antenna, When activated, a radio signal from the transmitter is received by the receiver via the transmitting antenna, the received signal controls the hanging amount measuring device, and the sand surface inside the hollow tube is detected from the hanging amount of the device body. A sand level gauge that is characterized by:
JP20184185A 1985-09-13 1985-09-13 Sand-surface meter Granted JPS6263821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20184185A JPS6263821A (en) 1985-09-13 1985-09-13 Sand-surface meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20184185A JPS6263821A (en) 1985-09-13 1985-09-13 Sand-surface meter

Publications (2)

Publication Number Publication Date
JPS6263821A true JPS6263821A (en) 1987-03-20
JPH0535810B2 JPH0535810B2 (en) 1993-05-27

Family

ID=16447779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20184185A Granted JPS6263821A (en) 1985-09-13 1985-09-13 Sand-surface meter

Country Status (1)

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JP (1) JPS6263821A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013142688A (en) * 2012-01-06 2013-07-22 Kitazawa Gijutsu Jimusho Kk Laser type liquid level meter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5527288A (en) * 1978-08-18 1980-02-27 Sanyo Electric Co Ltd Fabrication method of heat insulating plate
JPS5574992U (en) * 1978-11-16 1980-05-23

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5527288A (en) * 1978-08-18 1980-02-27 Sanyo Electric Co Ltd Fabrication method of heat insulating plate
JPS5574992U (en) * 1978-11-16 1980-05-23

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013142688A (en) * 2012-01-06 2013-07-22 Kitazawa Gijutsu Jimusho Kk Laser type liquid level meter

Also Published As

Publication number Publication date
JPH0535810B2 (en) 1993-05-27

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