JPH01177998A - Chipping method by water jet ejected in bubble - Google Patents
Chipping method by water jet ejected in bubbleInfo
- Publication number
- JPH01177998A JPH01177998A JP67188A JP67188A JPH01177998A JP H01177998 A JPH01177998 A JP H01177998A JP 67188 A JP67188 A JP 67188A JP 67188 A JP67188 A JP 67188A JP H01177998 A JPH01177998 A JP H01177998A
- Authority
- JP
- Japan
- Prior art keywords
- cover
- nozzle
- water
- jet water
- bubble
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims description 8
- 238000007664 blowing Methods 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- 239000004088 foaming agent Substances 0.000 description 22
- 238000002347 injection Methods 0.000 description 15
- 239000007924 injection Substances 0.000 description 15
- 238000005187 foaming Methods 0.000 description 10
- 238000004090 dissolution Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 229920001875 Ebonite Polymers 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000007790 scraping Methods 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、コンクリート構造物等の被はつり物をウォ
ータージェットによりはつる（削り取る）方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for scraping (scraping off) an object to be lifted, such as a concrete structure, using a water jet.
従来、コンクリート構造物等の被はつり物をはつる方法
として、その被はつり物にジェット水を噴射する方法が
知られている。2. Description of the Related Art Conventionally, as a method for lifting a covered object such as a concrete structure, a method of spraying jet water onto the covered object is known.
しかしながら、ジェット水の噴射によりコンクリート構
造物等の被はつり物をはつる場合は、水やはつり屑が飛
散しかつ１００ホーン以上の著しく大きい騒音が発生す
るので作業環境が悪く、飛散したはつり屑が作業員に突
き当たって怪我をする恐れがある。特に地下に埋設され
たコンクリートの洞道内でジェット水の噴射によりはつ
り作業を行なう場合は、作業空間が狭いので騒音被害が
著しく大きくなり、また洞道内には送電用ケーブル、通
信用ケーブル等が設置されており、飛散したはつり屑が
それらのケーブルに損傷を与える恐れがある。However, when lifting objects such as concrete structures by jetting water, the work environment is poor because water and chisel debris are scattered and extremely loud noise of over 100 horns is generated. There is a risk of injury due to collision with workers. Particularly when carrying out lifting work using a jet of water in a concrete tunnel buried underground, the work space is narrow and the noise damage is significant, and power transmission cables, communication cables, etc. are installed inside the tunnel. The cables may be damaged by flying debris.
この発明は前述の問題を有利に解決できる気泡中を噴射
されるウォータージェットによるはつり方法を提供する
ことを目的とするものであって、この発明の要旨とする
ところは前端が開放されているノズル前方被覆用カバー
１内に気泡２を注入し、そのカバー１内に配置されたノ
ズル３から噴射したジェット水４を、前記気泡２を通っ
て被はつり物５に噴射して、その被はつり物５をはつる
ことを特徴とする気泡中を噴射されるウォータージェッ
トによるはつり方法にある。It is an object of the present invention to provide a chisling method using a water jet injected into air bubbles, which can advantageously solve the above-mentioned problems. Air bubbles 2 are injected into the front covering cover 1, and jet water 4 is injected from a nozzle 3 disposed in the cover 1 through the air bubbles 2 and onto the object to be lifted 5, and the object to be lifted is sprayed. 5 is a method of chiseling using a water jet sprayed into bubbles.
次にこの発明を図示の例によって詳細に説明する。 Next, the present invention will be explained in detail using illustrated examples.
第１図および第２図はこの発明を実施する場合に使用す
る装置の一例を示すものであって、溶解槽６内にモータ
７により回転される攪拌器８が設けられ、かつ前記溶解
槽６の上部に、起泡剤添加装置９が接続されると共に、
給水槽１０が開閉弁１１を介して接続され、前記溶解槽
６の下部の排出口に注入用ポンプ１２の吸込管１３が接
続され、さらにその注入用ポンプ１２の吐出管１４とコ
ンプレッサからなる圧縮空気供給装置１５の圧縮空気供
給管１６とは発泡装置１７の入口に接続され、前記吐出
管１４に設けられた流量調整弁１８と前記圧縮空気供給
管１６に設けられた流量調整弁１９とは、制御盤２０か
らの信号により調節される。FIGS. 1 and 2 show an example of an apparatus used in carrying out the present invention, in which a stirrer 8 rotated by a motor 7 is provided in a dissolving tank 6, and the dissolving tank 6 A foaming agent addition device 9 is connected to the upper part of the
A water supply tank 10 is connected via an on-off valve 11, a suction pipe 13 of an injection pump 12 is connected to the discharge port at the bottom of the dissolution tank 6, and a compression pipe 13 consisting of a discharge pipe 14 of the injection pump 12 and a compressor is connected. The compressed air supply pipe 16 of the air supply device 15 is connected to the inlet of the foaming device 17, and the flow rate adjustment valve 18 provided on the discharge pipe 14 and the flow rate adjustment valve 19 provided on the compressed air supply pipe 16 are , are adjusted by signals from the control panel 20.
ノズル保持部材２１の前部に、前端が開放されている金
属製のノズル前方被覆用カバー１の後端部が連結され、
前記発泡装置１７の気泡出口に、中間にホースを備えて
いる気泡注入管２２の一端部が接続され、かつその気泡
注入管２２の他端部は前記カバー１の周壁に貫通固定さ
れ、さらにノズル保持部材２１により保持されているノ
ズル３に高圧ポンプ装置２３の高圧送水管２４が接続さ
れている。A rear end portion of a metal nozzle front covering cover 1 whose front end is open is connected to the front portion of the nozzle holding member 21,
One end of a bubble injection pipe 22 having a hose in the middle is connected to the bubble outlet of the foaming device 17, and the other end of the bubble injection pipe 22 is fixed to the peripheral wall of the cover 1 through the nozzle. A high-pressure water pipe 24 of a high-pressure pump device 23 is connected to the nozzle 3 held by the holding member 21 .
前記起泡剤添加装置９は、アニオン系の界面活性剤等の
起泡剤２５を収容したホッパ２６と、そのホッパ２６の
排出口に連結された垂直筒体２７と、その垂直筒体２７
に摺動自在に設けられた上段ゲート２８および下段ゲー
ト２９とにより構成され、前記上段ゲート２８および下
段ゲート２９は制′４Ｔａ盤３０の信号によりゲート駆
動装置３１゜３２を介して交互に自動的に開閉され、下
段ゲート２９が閉じられた状態で上段ゲート２８が開放
されると、ホッパ２６から垂直筒体２７内の下段ゲート
２９の上方に起泡剤２５が落下して充満し、また上段ゲ
ート２８が閉じられた状態で、下段ゲート２９が開放さ
れると、垂直筒体２７内から起泡剤２５が落下し、起泡
剤添加装置９から溶解槽６内に起泡剤２５が定置的に添
加される。The foaming agent addition device 9 includes a hopper 26 containing a foaming agent 25 such as an anionic surfactant, a vertical cylinder 27 connected to an outlet of the hopper 26, and a vertical cylinder 27.
It consists of an upper gate 28 and a lower gate 29 which are slidably provided in the upper gate 28 and the lower gate 29. When the upper gate 28 is opened with the lower gate 29 closed, the foaming agent 25 falls from the hopper 26 to the upper part of the lower gate 29 inside the vertical cylinder 27 and is filled with the foaming agent 25. When the lower gate 29 is opened with the gate 28 closed, the foaming agent 25 falls from within the vertical cylinder 27 and is placed in the dissolution tank 6 from the foaming agent addition device 9. It is added as follows.
次に第１図および第２図に示す装置を使用したこの発明
の実施例について説明する。Next, an embodiment of the present invention using the apparatus shown in FIGS. 1 and 2 will be described.
前記起泡剤添加装置９から起泡剤２５が溶解槽６内に供
給されると共に、前記給水槽１０から水が溶解槽６内に
供給され、かつ溶解槽６内で起泡剤と水とが撹拌器８に
より撹拌混合され、溶解槽６内の混合液体が注入用ポン
プ１２により発泡装置１７に供給されると共に、圧縮空
気供給装置１５から圧縮空気が発泡装置１７に供給され
、その発泡装置１７内で気泡が発生され、次いでその発
泡装置１７内で発生した気泡は気泡注入管２２を通って
カバー１内に注入され、そのカバー１内に気泡２が充満
される。The foaming agent 25 is supplied from the foaming agent addition device 9 into the dissolution tank 6, and water is supplied into the dissolution tank 6 from the water supply tank 10, and the foaming agent and water are mixed together in the dissolution tank 6. are stirred and mixed by the stirrer 8, and the mixed liquid in the dissolution tank 6 is supplied to the foaming device 17 by the injection pump 12, and compressed air is supplied to the foaming device 17 from the compressed air supply device 15, and the foaming device Bubbles are generated in the foaming device 17, and then the bubbles generated in the foaming device 17 are injected into the cover 1 through the bubble injection pipe 22, and the cover 1 is filled with bubbles 2.
またカバー１の前端縁はコンクリート構造物等の被はつ
り物５の表面に近接または接触するように配置され、前
記高圧ポンプ装置２３から約５００〜２０００ ｋｇｆ
／ｄの高圧水が高圧送水管２４を通ってノズル３に供給
され、そのノズル３から噴射されるジェット水４は前記
気泡２を通って前記波はつり物５に噴射され、その被は
つり物５が前記ジェット水の噴射によりはつられて、は
つり凹部３３が形成される。Further, the front edge of the cover 1 is arranged so as to be close to or in contact with the surface of the suspended object 5 such as a concrete structure, and the front edge of the cover 1 is arranged so as to be close to or in contact with the surface of the suspended object 5 such as a concrete structure.
/d of high-pressure water is supplied to the nozzle 3 through the high-pressure water pipe 24, and the jet water 4 injected from the nozzle 3 passes through the air bubbles 2 and the waves are injected onto the suspended object 5. is removed by the jet water, and a recessed portion 33 is formed.
第３図は起泡剤添加装置９の他の例を示すものであって
、起泡剤２５を収容したホッパ２６の排出口に、ロータ
リパルプ３４の弁箱３５における入口が接続され、かつ
その弁箱３５内に駆動装置により回転される回転弁体３
６が収容され、その回転弁体３６の周囲には同一の大き
さの凹部が等角度間隔で設けられ、前記ホッパ２６内の
起泡剤２５は、回転弁体３６の凹部内に充満されると共
に、その回転弁体３６．の回転により弁箱３５の出口か
ら排出され、起泡剤添加装置９から起泡剤２５が定量的
に排出される。FIG. 3 shows another example of the foaming agent addition device 9, in which the inlet of the valve box 35 of the rotary pulp 34 is connected to the outlet of the hopper 26 containing the foaming agent 25. A rotary valve body 3 rotated by a drive device inside a valve box 35
6 is accommodated, and recesses of the same size are provided at equal angular intervals around the rotary valve body 36, and the foaming agent 25 in the hopper 26 is filled in the recesses of the rotary valve body 36. In addition, the rotary valve body 36. The foaming agent 25 is discharged from the outlet of the valve box 35 by the rotation of the foaming agent 25, and the foaming agent 25 is quantitatively discharged from the foaming agent addition device 9.
第４図ないし第８図はノズル前方被覆用カバー１の他の
例を示すものであって、第４図および第５図に示す第１
例の場合は、前部が開放されている金属製カバー本体３
７の下部に左右方向に延長するはつり屑排出用スリット
３８が設けられ、かつカバー本体３７の下部の前部およ
び後部に、落下ガイド用ゴム製ガイド板３９の上部が接
着剤等により固着され、前後のゴム製ガイド板３９の間
隔は上部から下部に向かって縮小し、さらに前後方向に
延長するノズル３の前部がカバー本体３７の後面板に貫
通固定されると共に、気泡注入管２２がカバー本体３７
の上面板に貫通固定され、カバー１を固定したノズル３
および気泡注入管２２は矢印六方向に移動される。また
はつり屑および気泡は、はつり屑排出用スリット３８お
よび前後のゴム製ガイド板３９の間を通って落下する。4 to 8 show other examples of the nozzle front cover 1.
In the case of the example, the metal cover body 3 whose front part is open
A slit 38 for discharging chisel debris extending in the left-right direction is provided at the lower part of the cover body 37, and the upper part of a rubber guide plate 39 for falling guide is fixed to the front and rear parts of the lower part of the cover body 37 with adhesive or the like. The distance between the front and rear rubber guide plates 39 decreases from the top to the bottom, and the front part of the nozzle 3 extending in the front and back direction is fixed to the rear plate of the cover main body 37, and the bubble injection tube 22 is fixed to the cover body 37. Main body 37
The nozzle 3 is fixed through the top plate of the cover 1 and fixed to the cover 1.
And the bubble injection tube 22 is moved in the six directions of the arrow. Alternatively, the chips and air bubbles fall through between the chip removal slit 38 and the front and rear rubber guide plates 39.
第６図に示す第２例の場合は、中空半球体を４等分味た
形状の金属製カバー本体３７に、ノズル３および気泡注
入管２２が貫通固定され、かつ前記金属製カバー本体３
７における２つの分割縁部にそれぞれゴム板４０が接着
剤等により固着されて、ノズル前方被覆用カバー１が構
成され、カバー１を固定したノズル３および気泡注入管
２２は矢印Ａ方向に移動される。第２例の場合は、はつ
り屑を落下し易くすることができる。In the case of the second example shown in FIG. 6, the nozzle 3 and the bubble injection tube 22 are fixed through a metal cover body 37 that is shaped like a hollow hemisphere divided into four equal parts, and the metal cover body 3
A rubber plate 40 is fixed to each of the two divided edges at 7 with an adhesive or the like to constitute the nozzle front covering cover 1, and the nozzle 3 and bubble injection tube 22 to which the cover 1 is fixed are moved in the direction of arrow A. Ru. In the case of the second example, the chisel chips can be made easier to fall.
第７図および第８図に示す第３例の場合は、中空半球体
の下部を約９０°の範囲にわたって切り欠いた形状の硬
質ゴム製カバー本体４１における各切欠縁部に、それぞ
れ中空半球体をほぼ８等分した形状の軟質ゴム製補助カ
バー４２の側縁部が接着剤等により固着され、かつ前記
硬質ゴム製カバー本体４１とこれに固着された一対の軟
質ゴム製補助カバー４２とによりノズル前方被覆用カバ
ー１が構成され、そのカバー１の中心部にノズル３が貫
通固定され、さらに硬質ゴム製カバー本体４１の中央上
部に気泡注入管２２が貫通固定されている。前記カバー
本体４１を構成する硬質ゴムとしては、例えば８０〜９
０度の硬度のものが用いられ、また前記補助カバー４２
を構成する軟質ゴムとしては、例えば５０〜６０度の硬
度のものが用いられる。In the case of the third example shown in FIGS. 7 and 8, a hollow hemisphere is attached to each notch edge of the hard rubber cover main body 41, which has a shape in which the lower part of the hollow hemisphere is notched over an approximately 90° range. The side edges of the soft rubber auxiliary cover 42, which has a shape roughly divided into eight parts, are fixed with an adhesive or the like, and the hard rubber cover main body 41 and the pair of soft rubber auxiliary covers 42 fixed thereto A cover 1 for covering the front of the nozzle is constructed, a nozzle 3 is fixed through the center of the cover 1, and an air bubble injection pipe 22 is fixed through the center upper part of the cover main body 41 made of hard rubber. The hard rubber constituting the cover body 41 is, for example, 80 to 9
A material with a hardness of 0 degrees is used, and the auxiliary cover 42
As the soft rubber constituting the rubber, one having a hardness of, for example, 50 to 60 degrees is used.
第９図は発泡装置の一例を示すものであって、横方向に
延長するタンク４３の一端部に起泡剤水溶液の吐出管１
４と圧縮空気供給管１６とが接続され、かつタンク４３
の他端部に気泡注入管２２が接続され、前記タンク４３
の内部は、タンク長手方向に間隔をおいて取付けられた
複数の金１１ｉ１４４により区画され、さらにタンク４
３内の各区画室内にガラスピーズ等の多数の抵抗用粒子
４５が収容され、また前記タンク４３の他端の気泡出口
に粒子流出防止用金′ｌＩ４４６か取付けられ、前記起
泡剤水溶液と空気とが、前記多数の抵抗用粒子４５およ
び金網４４等の目の細かい物体を通過することにより、
気泡が発生する。なお第９図においてＰは圧力計である
。FIG. 9 shows an example of a foaming device, in which a discharge pipe 1 for a foaming agent aqueous solution is connected to one end of a tank 43 extending laterally.
4 and the compressed air supply pipe 16 are connected, and the tank 43
A bubble injection pipe 22 is connected to the other end of the tank 43.
The inside of the tank 4 is partitioned by a plurality of gold 11i 144 installed at intervals in the longitudinal direction of the tank.
A large number of resistance particles 45 such as glass beads are housed in each compartment of the tank 43, and a particle outflow prevention metal 446 is attached to the air bubble outlet at the other end of the tank 43, so that the aqueous foaming agent solution and air By passing through the large number of resistance particles 45 and fine objects such as the wire mesh 44,
Bubbles are generated. In addition, in FIG. 9, P is a pressure gauge.
この発明のはつり方法を、ケーブルを有するコンクリー
トの洞道内のはつりに実施した場合、はつり屑の飛散に
よるケーブルの損傷を防止することができ、水およびは
つり屑の飛散により洞道内が広い範囲にわたって汚れる
のを防止することができる。When the chisel method of the present invention is applied to chiseling in a concrete tunnel having a cable, it is possible to prevent damage to the cable due to scattering of chisel debris, and the inside of the tunnel is contaminated over a wide area due to scattering of water and chisel debris. can be prevented.
この発明によれば、ノズル３から噴射されたジェット水
４が、ノズル前方被覆用カバー１内に充満された気泡２
内を通過するので、ジェット水４付近の空気の振動によ
る高周波の伝播を軽減して騒音の発生を少なくすること
ができ、かつジェット水４の噴射部付近がカバー１によ
り被覆されているので、ジェット水４が被はつり物５に
衝突するときの衝突音を減少させることができると共に
、水やはつり屑の飛散を防止して作業員の安全性を確保
することができる等の効果が得られる。According to this invention, the jet water 4 injected from the nozzle 3 causes the air bubbles 2 filled in the nozzle front cover 1 to
Since the jet water 4 passes through the inside, it is possible to reduce the propagation of high frequency waves caused by air vibrations near the jet water 4 and reduce noise generation, and since the vicinity of the injection part of the jet water 4 is covered with the cover 1, It is possible to reduce the collision sound when the jet water 4 collides with the object to be lifted 5, and also to prevent the scattering of water and scraps, thereby ensuring the safety of workers. .
第１図はこの発明を実施する場合に使用する装置の一例
を示す一部縦断側面図、第２図はその装置における起泡
剤添加装置を示す縦断側面図、第３図は起泡剤添加装置
の他の例を示す縦断側面図である。第４図ないし第８図
は異なるカバーを使用した例を示すものであって、第４
図は第１例を示す斜視図、第５図はそｃ５縦断側面図、
第６図は第２例を示す斜視図、第７図は第３例を示す正
面図、第８図はその側面図である。第９図は発泡装置の
一例を示す一部縦断側面図である。
図において、１はノズル前方被覆用カバー、２は気泡、
３はノズル、４はジェット水、５は被はつり物、６は溶
解槽、８は撹拌器、９は起泡剤添加装置、ｌＯは給水槽
、１２は注入用ポンプ、１３は吸込管、１４は吐出管、
１５は圧縮空気供給装置、１６は圧縮空気供給管、１７
は発泡装置、１８および１９は流量調整弁、２１はノズ
ル保持部材、２２は気泡注入管、２３は高圧ポンプ装置
、２４は高圧送水管、２５は起泡剤、２６はホッパ、２
７は垂直筒体、２８は上段ゲート、２９は下段ゲート、
３７は金属製カバー本体、３９は落下ガイド用ゴム製ガ
イド板、４０はゴム板、４１は硬質ゴム製カバー本体、
４２は軟質ゴム製補助カバーである。
第２図Fig. 1 is a partially longitudinal side view showing an example of an apparatus used in carrying out this invention, Fig. 2 is a longitudinal side view showing a foaming agent addition device in the apparatus, and Fig. 3 is a blowing agent addition device. FIG. 7 is a vertical side view showing another example of the device. Figures 4 to 8 show examples using different covers.
The figure is a perspective view showing the first example, and Figure 5 is a vertical sectional side view of C5.
FIG. 6 is a perspective view showing the second example, FIG. 7 is a front view showing the third example, and FIG. 8 is a side view thereof. FIG. 9 is a partially longitudinal side view showing an example of a foaming device. In the figure, 1 is a cover for covering the front of the nozzle, 2 is a bubble,
3 is a nozzle, 4 is a jet water, 5 is a suspended object, 6 is a dissolution tank, 8 is a stirrer, 9 is a foaming agent addition device, IO is a water tank, 12 is an injection pump, 13 is a suction pipe, 14 is the discharge pipe,
15 is a compressed air supply device, 16 is a compressed air supply pipe, 17
18 and 19 are a foaming device, 18 and 19 are flow control valves, 21 is a nozzle holding member, 22 is a bubble injection pipe, 23 is a high pressure pump device, 24 is a high pressure water pipe, 25 is a foaming agent, 26 is a hopper, 2
7 is a vertical cylinder, 28 is an upper gate, 29 is a lower gate,
37 is a metal cover body, 39 is a rubber guide plate for fall guide, 40 is a rubber plate, 41 is a hard rubber cover body,
42 is a soft rubber auxiliary cover. Figure 2
Claims (1)
泡２を注入し、そのカバー１内に配置されたノズル３か
ら噴射したジェット水４を、前記気泡２を通って被はつ
り物５に噴射して、その被はつり物５をはつることを特
徴とする気泡中を噴射されるウォータージェットによる
はつり方法。Air bubbles 2 are injected into a nozzle front covering cover 1 whose front end is open, and jet water 4 is injected from a nozzle 3 disposed inside the cover 1 through the air bubbles 2 and onto the object 5 to be lifted. This method uses a water jet sprayed into air bubbles, which is characterized in that the object 5 is then lifted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63000671A JPH0671719B2 (en) | 1988-01-07 | 1988-01-07 | A method of chipping with a water jet sprayed in bubbles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63000671A JPH0671719B2 (en) | 1988-01-07 | 1988-01-07 | A method of chipping with a water jet sprayed in bubbles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01177998A true JPH01177998A (en) | 1989-07-14 |
| JPH0671719B2 JPH0671719B2 (en) | 1994-09-14 |
Family
ID=11480208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63000671A Expired - Lifetime JPH0671719B2 (en) | 1988-01-07 | 1988-01-07 | A method of chipping with a water jet sprayed in bubbles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0671719B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018108626A (en) * | 2017-01-04 | 2018-07-12 | 鹿島建設株式会社 | Water jet system and drilling method for concrete structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS621764U (en) * | 1985-06-15 | 1987-01-08 |
-
1988
- 1988-01-07 JP JP63000671A patent/JPH0671719B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS621764U (en) * | 1985-06-15 | 1987-01-08 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018108626A (en) * | 2017-01-04 | 2018-07-12 | 鹿島建設株式会社 | Water jet system and drilling method for concrete structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0671719B2 (en) | 1994-09-14 |
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