JP2675129B2 - Measuring device for crushing range in jet injection method - Google Patents
Measuring device for crushing range in jet injection methodInfo
- Publication number
- JP2675129B2 JP2675129B2 JP1073769A JP7376989A JP2675129B2 JP 2675129 B2 JP2675129 B2 JP 2675129B2 JP 1073769 A JP1073769 A JP 1073769A JP 7376989 A JP7376989 A JP 7376989A JP 2675129 B2 JP2675129 B2 JP 2675129B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- receiver
- injection
- jet
- ground
- 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
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【発明の詳細な説明】 [産業上の利用分野] 本発明は、噴射注入工法における破砕範囲の測定装置
に関する。Description: [Industrial application] The present invention relates to a crushing range measuring device in a jet injection method.
[従来の技術] 噴射注入工法の施工における地盤や岩盤の破砕範囲の
計測は、出来上り柱状固結体の品質管理や工法能率の向
上を図るための基礎技術のひとつである。[Prior art] Measurement of the crushing range of the ground and rock in the construction of the injection pouring method is one of the basic techniques for quality control of finished columnar solidified bodies and improvement of construction method efficiency.
そのために、地中連続壁や場所打ち杭の掘削時には、
通常、ベントナイト液中で超音波の反射により破砕範囲
を計測し、施工管理に反映させている。Therefore, when excavating underground continuous walls and cast-in-place piles,
Usually, the crushing range is measured by the reflection of ultrasonic waves in bentonite liquid and reflected in the construction management.
[発明が解決しようとする課題] しかし、噴射注入工法の場合のように、セメント粒子
や土粒子の懸濁液中で、しかも、その濃度が著しく高い
場合は、超音波を送信しても減衰が大きく正確な結果を
得ることはできない。そのために、超音波の出力を大き
くしたり、反射液を効率よくキャッチするためのパラボ
ラアンテナの利用やスタッキング手法の利用、あるいは
得られたデータの処理方法などについての技術開発が進
められている。しかしながら、その実用化には更に研究
を要し、しかも、その装置が複雑になるという欠点があ
る。[Problems to be Solved by the Invention] However, as in the case of the jet injection method, in a suspension of cement particles or soil particles, and when the concentration is extremely high, attenuation occurs even if ultrasonic waves are transmitted. Can't get big and accurate results. For this reason, technological developments are being made on increasing the output of ultrasonic waves, using parabolic antennas for efficiently catching the reflected liquid, using stacking methods, and processing the obtained data. However, its practical application requires further research, and has the drawback that the device becomes complicated.
本発明は、測定精度が良く、構造簡単な噴射注入工法
における破砕範囲の測定装置を提供することを目的とし
ている。It is an object of the present invention to provide a crushing range measuring device in a blast injection method having a high measurement accuracy and a simple structure.
[知見] ベントナイト液又は水の複層噴流中に超音波を乗せて
送り、更に壁面からの反射波の同じ噴流中を伝播したも
のを受信すると、超音波の減衰が極めて少なく、明確な
データを得ることができ、測定装置も比較的簡単なもの
となる。本発明は、かかる知見に基づいてなされたもの
である。[Knowledge] When ultrasonic waves are sent in a multi-layer jet of bentonite liquid or water, and when the waves reflected by the wall of the jet propagating in the same jet are received, the attenuation of the ultrasonic waves is extremely small and clear data is obtained. It can be obtained and the measuring device becomes relatively simple. The present invention has been made based on such findings.
[課題を解決するための手段] 本発明の噴射注入工法における破砕範囲の測定装置に
よれば、高圧の水又はベントナイト液を噴射するノズル
と、該ノズルの中央奥部に防護筒に囲まれて設けられた
超音波送受波器と、該送受波器を地上に接続する送受信
用ケーブルと、前記ノズルに水又はベントナイト液を圧
送するポンプと、データ送受信器と、超音波発振器と、
データレコーダとを設けてある。[Means for Solving the Problem] According to the crushing range measuring device in the injection and injection method of the present invention, the nozzle for injecting high-pressure water or bentonite liquid and the protective cylinder in the central inner part of the nozzle are surrounded. An ultrasonic wave transmitter / receiver provided, a transmission / reception cable for connecting the wave transmitter / receiver to the ground, a pump for pumping water or bentonite liquid to the nozzle, a data transmitter / receiver, and an ultrasonic oscillator,
A data recorder is provided.
上記ノズルは、中央の高圧ノズルと、その高圧ノズル
回りに設けた環状の低圧ノズルとで構成し、これら両ノ
ズルと超音波送受波器とで噴射装置を構成するのが好ま
しい。It is preferable that the nozzle is composed of a central high-pressure nozzle and an annular low-pressure nozzle provided around the high-pressure nozzle, and these nozzles and an ultrasonic wave transmitter / receiver constitute an injection device.
また、噴射装置は、測定を噴射注入工法の施工時に行
う場合は、公知技術による水中モニタの下端部に取付け
てガイド孔の所定深度に設置し、該工法の施工後に行う
場合は、ロッドの下端部に取付けて破砕孔の孔底に設置
するのが好ましい。Further, the injection device is attached to the lower end of the underwater monitor according to the known technique and installed at a predetermined depth of the guide hole when the measurement is performed at the time of performing the injection injection method, and when the measurement is performed after the method is performed, the lower end of the rod. It is preferable that the crushing hole is attached to the bottom of the crushing hole.
[作用] 上記のように構成された噴射注入工法における破砕範
囲の測定方法及びその装置において、噴射装置を回転す
ると共に、ポンプを作動して両ノズルから水又はベント
ナイト液を噴射し、超音波送受波器から超音波を発振し
てその破砕孔壁からの反射波を受信し、これら発振波と
受信波とに基づき地上に設置した機器により破砕孔の内
径を測定する。[Operation] In the method for measuring the crushing range in the injection injection method and the apparatus therefor configured as described above, the injection device is rotated and the pump is operated to inject water or bentonite liquid from both nozzles to transmit and receive ultrasonic waves. The ultrasonic wave is oscillated from the wave device, the reflected wave from the wall of the crush hole is received, and the inside diameter of the crush hole is measured by a device installed on the ground based on the oscillated wave and the received wave.
この際、超音波は防護筒によるノズル噴流の影響から
保護され、かつ、ノズル噴流中を伝播し反射するので、
減衰が極めて少なく、正確な測定値が得られる。At this time, the ultrasonic waves are protected from the influence of the nozzle jet by the protective cylinder, and propagate and reflect in the nozzle jet,
Very low attenuation and accurate measurement values are obtained.
したがって、また、高周波の超音波を送受信して明確
な記録が得られるので、読み取り誤差が小さい。Therefore, since high-frequency ultrasonic waves are transmitted and received to obtain clear recording, the reading error is small.
また、スラリーと地山のように音響インピーダンスの
差が極めて小さい地盤においても、正確なデータが得ら
れる。In addition, accurate data can be obtained even on the ground where the difference in acoustic impedance is extremely small, such as slurry and ground.
[実施例] 以下図面を参照して本発明の実施例を説明する。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
第1図には、本発明を実施する装置が示されている。 FIG. 1 shows an apparatus embodying the present invention.
図において、ガイド孔1の所定深度に挿入された水中
モニタ2の上方には三重管3および三重管スイベル4が
順次連結されている。この三重管3は支持装置5に回転
自在に支持され、三重管スイベル4はクレーン6により
吊り下げられており、クレーン6によって三重管スイベ
ル4を上下動することにより、水中モニタ2が上下動さ
れるようになっている。そして、三重管スイベル4は、
図示しないグラウドポンプ、コンプレッサ及び高圧水ポ
ンプに接続されている。In the figure, a triple pipe 3 and a triple pipe swivel 4 are sequentially connected above the underwater monitor 2 inserted into the guide hole 1 at a predetermined depth. The triple pipe 3 is rotatably supported by a support device 5, and the triple pipe swivel 4 is suspended by a crane 6. By moving the triple pipe swivel 4 up and down by the crane 6, the underwater monitor 2 is moved up and down. It has become so. And the triple tube swivel 4
It is connected to a grout pump, a compressor, and a high-pressure water pump (not shown).
測定装置は、水中モニタ2の下端部に設けられ後記の
超音波送受波器18を備えた噴射装置13と、超音波送受波
器18に接続された送受信用ケーブル7と、支持装置5の
下部に設けられた送受信用ケーブル7が接続されたデー
タ送受信器8と、地上に設置された噴射装置13に水又は
ベントナイト液を送るポンプ9、無線送受信器10、超音
波発振器11及びデータレコーダ12とからなっている。The measuring device is an injection device 13 provided at the lower end of the underwater monitor 2 and provided with an ultrasonic wave transmitter / receiver 18 described later, a transmission / reception cable 7 connected to the ultrasonic wave transmitter / receiver 18, and a lower portion of the support device 5. A data transmitter / receiver 8 to which a transmission / reception cable 7 is connected, a pump 9 for sending water or bentonite liquid to a jetting device 13 installed on the ground, a radio transmitter / receiver 10, an ultrasonic oscillator 11 and a data recorder 12. It consists of
第2図及び第3図において、噴射装置13には、高圧の
水又はベントナイト液を噴射する高圧ノズル14の回り
に、低圧の水又はベントナイト液を噴射する低圧ノズル
14が環状に設けられ、それぞれホース16、17により地上
のポンプ9に接続されている。2 and 3, the injection device 13 includes a low-pressure nozzle that injects low-pressure water or bentonite liquid around a high-pressure nozzle 14 that injects high-pressure water or bentonite liquid.
14 is provided in an annular shape and is connected to the above-ground pump 9 by hoses 16 and 17, respectively.
その高圧ノズル14の中央奥部には、超音波送受波器18
が設けられ、その回りは防護筒19で覆われ、水又はベン
トナイト液の高圧噴流の影響を防ぐようになっている。
そして、この超音波送受波器18は、送受信用ケーブル7
によりデータ送受信器8に接続されている。At the back of the center of the high-pressure nozzle 14, an ultrasonic transducer 18
Is provided, and the surrounding area is covered with a protective cylinder 19 so as to prevent the influence of a high-pressure jet of water or bentonite liquid.
The ultrasonic wave transmitter / receiver 18 is used for the transmission / reception cable 7
Is connected to the data transmitter / receiver 8.
測定は、コラムジェット工法などの噴射注入工法の施
工時のリアルタイムで行う方法と、前記工法の施工後に
行う方法との2種類あるが、本発明はいずれの場合にも
実施できる。There are two types of measurement, a method of performing in real time at the time of construction of a jet injection method such as a column jet construction method and a method of performing after the construction of the construction method, but the present invention can be implemented in any case.
第4図(a)ないし(b)にあ、リアルタイムで実施
する態様が示されている。FIGS. 4 (a) and 4 (b) show a mode of implementation in real time.
先ず、施工の対象となる施工深度まで、例えば直径15
cm程度のガイド孔1を穿孔する(第4図(a))。First, up to the construction depth that is the target of construction, for example, diameter 15
A guide hole 1 of about cm is formed (Fig. 4 (a)).
次いで、噴射装置13を下端部に設けた水中モニタ2を
所定深度に設置する(第4図(b))。Next, the underwater monitor 2 provided with the injection device 13 at the lower end is installed at a predetermined depth (FIG. 4 (b)).
次いで、水中モニタ2からコラムジェット20を噴射し
て地盤を破砕すると共に、噴射装置13のノズル14、15か
ら水又はベントナイト液を噴射しながら超音波送受波器
18からの超音波を発振し、発振波と、その破砕孔21の孔
壁からの反射波と地上の機器10〜12で処理し、破砕孔21
の内径を測定する(第3図(c))。この際、コラムジ
ェット工法の例えばセメントミルクのような注入材の懸
濁粒子が大きく、粘度が高いスラリー中でも、水又はベ
ントナイト液の噴流に乗せられた超音波は、減衰が非常
に少なく、極めて正確なデータが得られる。Then, the column jet 20 is jetted from the underwater monitor 2 to crush the ground, and the ultrasonic transducer is jetted while jetting water or bentonite liquid from the nozzles 14 and 15 of the jetting device 13.
The ultrasonic wave from 18 is oscillated, and the oscillated wave, the reflected wave from the hole wall of the crushing hole 21 and the ground equipment 10 to 12 are processed, and the crushing hole 21
The inner diameter of is measured (Fig. 3 (c)). At this time, even if the suspension particles of the injection material such as cement milk of the column jet method are large and the viscosity is high, the ultrasonic waves put on the jet of water or bentonite liquid has very little attenuation and is extremely accurate. Data can be obtained.
第5図(a)ないし(c)には、施工と計測をタイム
ラグを設けて実施する態様が示されている。5 (a) to 5 (c) show a mode in which construction and measurement are performed with a time lag.
先ず、コラムジェット工法などの噴射注入工法終了
後、施工機械22等を撤去する(第5図(a))。First, after the injection and injection method such as the column jet method is completed, the construction machine 22 and the like are removed (Fig. 5 (a)).
次いで、ロッド23の下端部に噴射装置13を取付け、セ
メントミルク等スラリー24が充填されている破砕孔21の
孔底に設置する(第5図(b))。Next, the injection device 13 is attached to the lower end of the rod 23, and is installed at the bottom of the crushing hole 21 filled with the slurry 24 such as cement milk (Fig. 5 (b)).
次いで、ロッド23を回転し、地上のポンプ9を作動す
ると共に、超音波送受波器18から超音波を発振して前述
と同様に掘削孔21の内径を測定する(第5図(c))。Next, the rod 23 is rotated, the pump 9 on the ground is operated, and ultrasonic waves are oscillated from the ultrasonic wave transmitter / receiver 18 to measure the inner diameter of the drilled hole 21 in the same manner as described above (FIG. 5 (c)). .
[発明の効果] 本発明は、以上説明したように構成されているので、
以下に記載されるような効果を奏する。[Effects of the Invention] Since the present invention is configured as described above,
The following effects are obtained.
コラムジェット工法などのような噴射注入工法の施工
時、注入材としてセメントミルクのような懸濁粒子が大
きく、粘度の高いスラリー中でも超音波の減衰が非常に
少なく、極めて正確なデータを得ることができる。During the injection injection method such as the column jet method, the suspension particles such as cement milk are large as the injection material, and the attenuation of ultrasonic waves is very small even in a highly viscous slurry, and extremely accurate data can be obtained. it can.
また、超音波の発振波、反射波の伝播路である水又は
ベントナイト液の噴流は、地盤の種類に応じて例えば非
崩壊性の粘性土又は崩壊性の砂地盤に対し、水噴流又は
ベントナイト液噴流と使い分けることができる。Further, the jet of water or bentonite liquid, which is the propagation path of ultrasonic waves and reflected waves, is a water jet or bentonite liquid, for example, for non-collapseable cohesive soil or collapsible sand ground, depending on the type of ground. Can be used properly with a jet.
また、スラリーと地山のように音響インピーダンスの
差異が極めて小さい地盤の施工でも、正確なデータを得
ることができる。In addition, accurate data can be obtained even when constructing the ground such as the slurry and the ground where the difference in acoustic impedance is extremely small.
また、施工中でも、施工後でも同様に正確なデータを
得ることができる。In addition, it is possible to obtain accurate data during and after construction.
また、地盤の破砕範囲をみながら施工できるので、セ
メントミルクなどの注入材を経済的に使用し、計画した
範囲だけ正確に地盤改良を行い、施工能率を向上するこ
とができる。Further, since the construction can be performed while observing the crushing range of the ground, it is possible to economically use the injection material such as cement milk, accurately improve the ground only within the planned range, and improve the construction efficiency.
また、ノズルを中央の高速ノズルと環状の低速ノズル
との二重ノズル(必要に応じて三重以上の複重ノズルと
する)に構成し、中央の噴流の有効飛走距離を長くし、
1000センチポアズを越える高粘度のスラリー中でも2m程
度の範囲までの計測を行うことができる。In addition, the nozzle is configured as a double nozzle consisting of a high-speed nozzle in the center and a low-speed nozzle in an annular shape (if necessary, it is a double or triple nozzle with a triple or more) to increase the effective flight distance of the central jet.
It is possible to measure up to a range of about 2 m even in a highly viscous slurry exceeding 1000 centipoise.
また、噴射注入工法だけでなく、懸濁粒子が大きく、
見掛け比重の大きい例えば場所打ち杭の孔底部などに対
しても実施することができる。In addition to the injection and injection method, the suspended particles are large,
It can also be applied to a hole bottom of a cast-in-place pile having a large apparent specific gravity.
また、超音波発振器をノズル内部に設ける構造なの
で、構造が比較的簡単である。Further, since the ultrasonic oscillator is provided inside the nozzle, the structure is relatively simple.
第1図は本発明を実施する装置の一例を示す全体構成
図、第2図は噴射装置を示す側断面図、第3図は第2図
のA矢視図、第4図(a)ないし(c)はリアルタイム
に実施する態様を示す工順図、第5図(a)〜(c)は
施工と計測をタイムラグを設けて実施する態様を示す工
順図である。 7……送受信用ケーブル、8……超音波送受信器、9…
…ポンプ、10……無線送受信器、11……超音波発振器、
12……データレコーダ、13……噴射装置、14……高圧ノ
ズル、15……低圧ノズル、18……超音波送受波器、19…
…防護筒、21……破砕孔FIG. 1 is an overall configuration diagram showing an example of an apparatus for carrying out the present invention, FIG. 2 is a side sectional view showing an injection apparatus, FIG. 3 is a view taken in the direction of arrow A in FIG. 2, and FIGS. (C) is a work order diagram showing a mode of carrying out in real time, and FIGS. 5 (a) to (c) are work order diagrams showing a mode of carrying out construction and measurement with a time lag. 7 ... Transmission / reception cable, 8 ... Ultrasonic transceiver, 9 ...
… Pump, 10… Wireless transceiver, 11… Ultrasonic oscillator,
12 ... Data recorder, 13 ... Injection device, 14 ... High pressure nozzle, 15 ... Low pressure nozzle, 18 ... Ultrasonic wave transceiver, 19 ...
… Protective cylinder, 21 …… Crush hole
Claims (1)
ズルと、該ノズルの中央奥部に防護筒に囲まれて設けら
れた超音波送受波器と、該送受波器を地上に接続する送
受信用ケーブルと、前記ノズルに水又はベントナイト液
を圧送するポンプと、データ送受信器と、超音波発振器
と、データレコーダとを設けたことを特徴とする噴射注
入工法における破砕範囲の測定装置。1. A nozzle for injecting high-pressure water or bentonite liquid, an ultrasonic wave transmitter / receiver provided in a central inner part of the nozzle surrounded by a protective cylinder, and a transmitter / receiver for connecting the wave transmitter / receiver to the ground. An apparatus for measuring a crushing range in a jet injection method, comprising: a cable for use with a pump, a pump for sending water or bentonite liquid to the nozzle under pressure, a data transmitter / receiver, an ultrasonic oscillator, and a data recorder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1073769A JP2675129B2 (en) | 1989-03-28 | 1989-03-28 | Measuring device for crushing range in jet injection method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1073769A JP2675129B2 (en) | 1989-03-28 | 1989-03-28 | Measuring device for crushing range in jet injection method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02252813A JPH02252813A (en) | 1990-10-11 |
JP2675129B2 true JP2675129B2 (en) | 1997-11-12 |
Family
ID=13527752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1073769A Expired - Lifetime JP2675129B2 (en) | 1989-03-28 | 1989-03-28 | Measuring device for crushing range in jet injection method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2675129B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2575992B2 (en) * | 1992-04-20 | 1997-01-29 | 常盤建設株式会社 | Hardening material injection area confirmation method |
JP6985948B2 (en) * | 2018-02-02 | 2021-12-22 | 五洋建設株式会社 | Measurement device for CP method, casing pipe for CP method and construction management method for CP method |
JP6960371B2 (en) * | 2018-05-07 | 2021-11-05 | 小野田ケミコ株式会社 | Ground improvement method |
JP7271813B2 (en) * | 2019-04-15 | 2023-05-12 | 株式会社大林組 | Workmanship control method and device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6058329B2 (en) * | 1982-07-30 | 1985-12-19 | 日立造船株式会社 | How to install a bottom-mounted offshore structure using a used tanker |
JPS62146906U (en) * | 1987-02-26 | 1987-09-17 |
-
1989
- 1989-03-28 JP JP1073769A patent/JP2675129B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH02252813A (en) | 1990-10-11 |
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