JPH01190879A - Chipping method for reinforced concrete structure through ultrahigh pressure injection anion series high molecular agent water solution - Google Patents
Chipping method for reinforced concrete structure through ultrahigh pressure injection anion series high molecular agent water solutionInfo
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- JPH01190879A JPH01190879A JP1458788A JP1458788A JPH01190879A JP H01190879 A JPH01190879 A JP H01190879A JP 1458788 A JP1458788 A JP 1458788A JP 1458788 A JP1458788 A JP 1458788A JP H01190879 A JPH01190879 A JP H01190879A
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- Prior art keywords
- ultra
- high pressure
- high molecular
- molecular agent
- water solution
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Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、アニオン系高分子剤水溶液を回転するノズ
ルから超高圧で噴射して鉄筋コンクリート構造物におけ
るコンクリートをはつる（削り取る）方法に関するもの
である。[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a method for scraping (scraping) concrete in reinforced concrete structures by spraying an aqueous anionic polymer agent solution at ultra-high pressure from a rotating nozzle. be.
従来、鉄筋コンクリート構造物におけるコンクリートを
はつる方法の一つとして、５００〜２０００ｋｇｆ／ａ
ａの超高圧水を鉄筋コンクリート構造物に噴射する方法
が知られている。しかし、粘性を殆んど持たない水を超
高圧で噴射しても、あまり大きなはつり能力を期待する
ことはできない。Conventionally, as one of the methods for pouring concrete in reinforced concrete structures,
A method of injecting ultra-high pressure water into reinforced concrete structures is known. However, even if water with almost no viscosity is injected at ultra-high pressure, one cannot expect a very large lifting ability.
この対策として、高分子剤水溶液からなる粘性液体を鉄
筋コンクリート構造物に超高圧で噴射して、はつり能力
を増大させることが考えられる。As a countermeasure to this problem, it is possible to increase the chipping ability by injecting a viscous liquid consisting of an aqueous solution of a polymeric agent onto the reinforced concrete structure at an extremely high pressure.
しかし、この場合は下記の問題がある。However, in this case, there are the following problems.
（１） 高濃度の高分子剤水溶液を超高圧ポンプを有
する超高圧水発生装置に供給した場合は、超高圧ポンプ
を駆動する電動機に過負荷が作用すると共に、超高圧ポ
ンプが早期摩耗して寿命が低下し、またポンプや配管内
で脈動が発生する。(1) When a highly concentrated polymer agent aqueous solution is supplied to an ultra-high pressure water generator equipped with an ultra-high pressure pump, an overload will be applied to the electric motor that drives the ultra-high pressure pump, and the ultra-high pressure pump will wear out prematurely. The service life will be shortened and pulsation will occur in the pump and piping.
（２） 低粘度の高分子剤水溶液を使用した場合は、
超高圧水発生装置内で機械的退化を受け、ノズルから吐
出された高分子剤水溶液の粘度が水と同程度の粘度にな
るので、粘性剤混入の効果を発揮することができない。(2) When using a low viscosity polymer agent aqueous solution,
The viscosity of the polymer agent aqueous solution discharged from the nozzle becomes as viscous as water due to mechanical degradation within the ultra-high pressure water generator, and therefore the effect of viscous agent mixing cannot be exhibited.
（３）４級アミン塩を含有するアクリル酸エステル誘導
体と３級アミン塩を含有するカチオン系の高分子剤との
２種類のカチオン系の高分子剤の水溶液を、超高圧水発
生装置に注入すると共に、その超高圧水発生装置に接続
されたノズルから噴射して錆びた鉄筋の錆び落としを行
なうと、約３０分経過後に、はぼ黄色から茶褐色を帯び
た錆びが鉄筋のリブや節に著しく多く発生する。(3) Inject an aqueous solution of two types of cationic polymer agents, an acrylic ester derivative containing a quaternary amine salt and a cationic polymer agent containing a tertiary amine salt, into an ultra-high pressure water generator. At the same time, when water is sprayed from a nozzle connected to the ultra-high pressure water generator to remove the rust from the reinforcing bars, after about 30 minutes, pale yellow to brownish rust appears on the ribs and joints of the reinforcing bars. Occurs significantly frequently.
その理由は、前記高分子剤がクロル（塩素イオン）、硫
酸イオンを含有しているので、錆びの発生を助長してい
るからである。さらに前記カチオン系の高分子剤水溶液
は付着性が良いので長時間にわたって鉄筋表面に付着し
、そのため水と比較して錆びの発生量が多い。The reason for this is that the polymer agent contains chlorine (chlorine ion) and sulfate ion, which promotes the occurrence of rust. Furthermore, the cationic polymer agent aqueous solution has good adhesion and adheres to the reinforcing steel surface for a long time, resulting in a greater amount of rust compared to water.
（４） エチレンオキサイドの重合体あるいはアクリ
ルアミドの重合体からなるノニオン系の高分子剤の水溶
液を使用した場合は、カチオン系の高分子剤水溶液に比
べて錆びの発生量が少ないが、しかし、鉄筋に噴射して
から約３０分経過すると、鉄筋のリブや節の部分に錆び
が発生する。(4) When an aqueous solution of a nonionic polymer agent made of an ethylene oxide polymer or an acrylamide polymer is used, the amount of rust generated is less than that of a cationic polymer agent aqueous solution, but Approximately 30 minutes after spraying, rust appears on the ribs and knots of the reinforcing bars.
この発明は前述の問題を有利に解決できるアニオン系高
分子剤水溶液超高圧噴射による鉄筋コンクリート構造物
の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、超高圧液供給用中空
回転軸１に連結されたノズルヘッド２に、その中空回転
軸１の中心の周囲方向に間隔をおいて配置された複数の
ノズル３を設け、前記ノズルヘッド２を回転しながら、
アニオン系高分子剤を水に対し０．０５〜０．２重量％
添加してなる高分子剤水溶液を、前記各ノズル３から超
高圧で噴射して、その超高圧噴射高分子剤水溶液により
鉄筋コンクリート構造物のコンクリートをはつることを
特徴とするアニオン系高分子剤水溶液超高圧噴射による
鉄筋コンクリート構造物のはつり方法にある。The object of the present invention is to provide a method for chiseling reinforced concrete structures by ultra-high-pressure injection of anionic polymer aqueous solution, which can advantageously solve the above-mentioned problems. A nozzle head 2 connected to a hollow rotating shaft 1 for supplying high-pressure liquid is provided with a plurality of nozzles 3 arranged at intervals around the center of the hollow rotating shaft 1. ,
0.05-0.2% by weight of anionic polymer agent in water
An anionic polymer agent aqueous solution, characterized in that the polymer agent aqueous solution containing the added polymer agent is injected at ultra-high pressure from each of the nozzles 3, and the concrete of a reinforced concrete structure is plastered with the ultra-high pressure sprayed polymer agent aqueous solution. A method for chiseling reinforced concrete structures using ultra-high pressure injection.
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
るはつり装置の一例を示すものであって、回転式撹拌器
４を備えている混合槽５の上部に、給水口６を有する粉
末状高分子剤溶解器７が連結され、かつ前記混合槽５の
下部出口は、電動機により回転される高圧ポンプを備え
ている超高圧液発生装置８の入口に定量ポンプ９を介し
て接続され、さらにキャスタを有する移動フレーム１０
の上部に、支持台１１が昇降および水平回動自在に設け
られている。FIGS. 1 and 2 show an example of a chipping device used in carrying out the present invention, in which a mixing tank 5 equipped with a rotary stirrer 4 has a water supply port 6 at the top thereof. The lower outlet of the mixing tank 5 is connected via a metering pump 9 to the inlet of an ultra-high pressure liquid generator 8 equipped with a high pressure pump rotated by an electric motor. The moving frame 10 further has casters.
A support stand 11 is provided on the upper part of the support stand 11 so as to be movable up and down and horizontally rotatable.
前記支持台１１に水平な中心線を有する前端開放箱状の
ケース１２が固定され、かつそのケース ′１２の中心
線上に配置された超高圧液供給用中空回転軸１は、ケー
ス１２により軸受１３を介して回転自在にかつ軸方向に
移動しないように支承され、さらに前記中空回転軸１の
後部においてケース１２の中心線上に配置された超高圧
液供給管１４の前端部は、ケース１２の端板に固定され
ると共に、前記中空回転軸１に対しスイヘルジョイント
１５を介して接続され、前記超高圧液供給管１４の後端
部にホース１６の一端部が継手１７を介して接続され、
またそのホース１６の他端部は前記超高圧液発生装置８
における超高圧液出口に接続されている。A box-shaped case 12 with an open front end and a horizontal center line is fixed to the support base 11, and the hollow rotary shaft 1 for supplying ultra-high pressure liquid, which is arranged on the center line of the case '12, is connected to a bearing 13 by the case 12. The front end of the ultra-high pressure liquid supply pipe 14 is supported so as to be rotatable and immovable in the axial direction through It is fixed to the plate and connected to the hollow rotating shaft 1 via a swivel joint 15, and one end of a hose 16 is connected to the rear end of the ultra-high pressure liquid supply pipe 14 via a joint 17.
The other end of the hose 16 is connected to the ultra-high pressure liquid generator 8.
connected to the ultra-high pressure liquid outlet at the
中心軸１８の前端部に、その中心軸１８から直径方向の
両側に突出する分岐アーム１９が連設され、かつ各分岐
アーム１９の先端部には、前方に向かって相互に接近す
る方向に傾斜する突起２０が連設され、さらに前記中心
軸１８１分岐アーム１９および突起２０に、それらの中
心部にわたって延長する超高圧液供給孔２１が設けられ
て、ノズルヘッド２が構成され、前記各突起２０にノズ
ル３が螺合固定され、また前記超高圧液供給用中空回転
軸１の前端部に中心軸１８の後端部が螺合連結され、さ
らに前記各ノズル３は中心軸１８の中心線から等距離に
配置されている。Branch arms 19 are connected to the front end of the central shaft 18 and project from both sides in the diametrical direction from the central shaft 18, and the distal ends of each branch arm 19 are inclined in a direction that approaches each other toward the front. Further, the central axis 181, the branch arm 19, and the protrusion 20 are provided with an ultra-high pressure liquid supply hole 21 extending over the center thereof, thereby forming the nozzle head 2, and each of the protrusions 20 A nozzle 3 is screwed and fixed to the center, and a rear end of a central shaft 18 is screwed and connected to the front end of the hollow rotary shaft 1 for supplying ultra-high pressure liquid. placed at equal distances.
前記超高圧液供給用中空回転軸１に対し平行に配置され
た駆動軸２２はケース１２に固定された軸受により回転
自在に支承され、かつ駆動軸２２に固定された駆動歯車
２３は前記中空回転軸１に固定された従動歯車２４に噛
み合わされ、さらに前記駆動軸２２に羽根車２５が固定
され、回転用超高圧液供給管２６の一端部は前記超高圧
液供給管１４の側部に接続され、その超高圧液供給管２
６の他端部に固定されたノズルは前記羽根車２５に対向
し、前記超高圧液発生装置８を運転すると、超高圧液が
各ノズル３から前方に向かって斜めに噴射され、かつ回
転用超高圧液供給管２６から羽根車２５に向かって超高
圧液が噴射されてその羽根車２５が回転されるので、そ
の羽根車２５により駆動歯車２３．従動歯車２４および
超高圧液供給用中空回転軸１を介してノズルヘッド２が
回転される。A drive shaft 22 arranged parallel to the ultra-high pressure liquid supply hollow rotating shaft 1 is rotatably supported by a bearing fixed to the case 12, and a drive gear 23 fixed to the drive shaft 22 is arranged parallel to the hollow rotating shaft 1 for supplying ultra-high pressure liquid. It is meshed with a driven gear 24 fixed to the shaft 1, an impeller 25 is further fixed to the drive shaft 22, and one end of a rotating ultra-high pressure liquid supply pipe 26 is connected to the side of the ultra-high pressure liquid supply pipe 14. and its ultra-high pressure liquid supply pipe 2
The nozzles fixed to the other end of the nozzles 6 face the impeller 25, and when the ultra-high pressure liquid generator 8 is operated, ultra-high pressure liquid is injected diagonally forward from each nozzle 3. The ultra-high pressure liquid is injected from the ultra-high pressure liquid supply pipe 26 toward the impeller 25 and the impeller 25 is rotated, so that the impeller 25 causes the drive gear 23. The nozzle head 2 is rotated via the driven gear 24 and the hollow rotating shaft 1 for supplying ultra-high pressure liquid.
前述のように構成されたはつり装置を使用して、鉄筋コ
ンクリート構造物２７のコンクリートをはつる場合は、
前記混合槽５の上部の粉末状高分子剤溶解器７に水を供
給すると共に、その水に対し０．０５〜０．２重量％の
アニオン系高分子剤粉末を添加して熔解し、次いでこれ
を混合槽５内で撹拌混合して、適度の粘性を有するアニ
オン系高分子剤水溶液とする。When chipping concrete for the reinforced concrete structure 27 using the chisel constructed as described above,
Water is supplied to the powdered polymeric agent dissolver 7 in the upper part of the mixing tank 5, and 0.05 to 0.2% by weight of anionic polymeric agent powder is added to the water and melted, and then This is stirred and mixed in the mixing tank 5 to form an anionic polymer agent aqueous solution having appropriate viscosity.
次いで混合槽５内のアニオン系高分子剤水溶液を、定量
ポンプ９により超高圧液発生袋Ｗ８に供給し、その超高
圧液発生装置８から送られる２０００ｋｇｆ／ ｃＪの
超高圧のアニオン系高分子剤水溶液をを、ホース１６．
超高圧液供給管１４．中空回転軸１およびノズルヘッド
２を通って各ノズル３から鉄筋コンクリート構造物２７
に向かって斜めに噴射し、かつ回転用超高圧液供給管２
６から羽根車２５に超高圧のアニオン系高分子剤水溶液
を噴射して、各ノズル３を中心軸１８の中心線の周りに
旋回させ、第３図に示すように、鉄筋コンクリート構造
物２７におけるコンクリート２８を破線２９で示すよう
にＶ字状断面にはつり、かつはつられた部分に残された
鉄筋３０の錆びを前記超高圧のアニオン系高分子剤水溶
液の噴射により除去する。Next, the anionic polymer agent aqueous solution in the mixing tank 5 is supplied to the ultra-high pressure liquid generation bag W8 by the metering pump 9, and the anionic polymer agent at an ultra-high pressure of 2000 kgf/cJ is sent from the ultra-high pressure liquid generator 8. Pour the aqueous solution into the hose 16.
Ultra-high pressure liquid supply pipe 14. Reinforced concrete structure 27 from each nozzle 3 through hollow rotating shaft 1 and nozzle head 2
Ultra-high pressure liquid supply pipe 2 for rotating and injecting diagonally toward
6 to the impeller 25, each nozzle 3 is rotated around the center line of the central axis 18, and as shown in FIG. As shown by the broken line 29, the reinforcing bar 30 is suspended from the V-shaped cross section, and the rust left on the reinforcing bar 30 is removed by spraying the ultra-high pressure aqueous anionic polymer solution.
この場合アニオン系高分子剤水溶液は塩素イオンおよび
硫酸イオンを含んでいないので、鉄筋に錆びが殆んど発
生しない。In this case, since the anionic polymer agent aqueous solution does not contain chloride ions and sulfate ions, almost no rust occurs on the reinforcing bars.
第４図は複数のノズル３を有するノズルヘッド２の他の
例を示すものであって、各分岐アーム１９の先端部に突
起２０が直角に連設されている。第４図に示すノズルヘ
ッド２を使用した場合は、第５図に破ｖＡ２９で示すよ
うにコンクリート２８を一様にはつることができる。FIG. 4 shows another example of the nozzle head 2 having a plurality of nozzles 3, in which a protrusion 20 is connected at right angles to the tip of each branch arm 19. When the nozzle head 2 shown in FIG. 4 is used, the concrete 28 can be uniformly poured as shown by the broken vA29 in FIG.
次にこの発明において用いられるアニオン系高分子剤の
構造例を示す。Next, an example of the structure of the anionic polymer agent used in the present invention will be shown.
例１
（ＣＨｚ ＣＨ）ｌＩ（ＣＨ２ＣＨ）、１ＣＯＯＮ、
ＣＯＮＨ２アクリル酸ナトリウム・アク
リルアミドの共重合物例２
（ＣＨＩ −ＣＨ）、 （ＣＨ２−ＣＨ）、
ｌＩ
Ｃ０ＮＨＣａＨｓ Ｓ ０３Ｎ−Ｃ０ＮＨｚ２−アクリ
ルアミド−２−メチルプロパンスルホン酸ナトリウムの
共重合物欲にアニオン系高分子剤水溶液を、その濃度を
変えて超高圧で噴射してコンクリートのはつりを行なっ
た実験例について説明する。Example 1 (CHz CH)lI(CH2CH), 1COON,
CONH2Sodium acrylate/acrylamide copolymer example 2 (CHI-CH), (CH2-CH),
lI C0NHCaHs S 03N-C0NHz 2-Acrylamido-2-Methylpropanesulfonic acid sodium copolymer An explanation of an experimental example in which concrete was chipped by spraying anionic polymer agent aqueous solution at ultra-high pressure with varying concentrations. do.
巾２０ｃｍ、高さ２０ｃｍ、長さ４０Ｇのコンクリート
ブロックを製作し、そのコンクリートブロックの表面と
ノズルとの間隔を３ｃｍに設定し、そのノズルからアニ
オン系高分子剤水溶液を２０００ｋｇｆ／−の圧力で噴
射しながら、ノズルをコンクリートブロックの長手方向
にｌＱｃｍ／ｍｉｎ の速度で移動させて、はつりを行
なった。A concrete block with a width of 20 cm, a height of 20 cm, and a length of 40 G was manufactured, the distance between the surface of the concrete block and the nozzle was set to 3 cm, and an anionic polymer agent aqueous solution was injected from the nozzle at a pressure of 2000 kgf/-. At the same time, the nozzle was moved in the longitudinal direction of the concrete block at a speed of 1Q cm/min to carry out chipping.
はつられたコンクリートブロックをその長手方向に１０
分割して、はつりの平均深さを測定した。10 pieces of concrete blocks in the longitudinal direction
It was divided and the average depth of the chisel was measured.
その結果得られたアニオン系高分子剤添加量（重量％）
とはつり深さ（ｃｍ）との関係を第６図に示す。The resulting amount of anionic polymer agent added (wt%)
Fig. 6 shows the relationship between the value and the suspension depth (cm).
この発明を実施する場合、水に対するアニオン系高分子
剤の添加量が０．０５重量％よりも少ないと、粘性液体
の効果を十分に発揮することができず、水のみを超高圧
で噴射した場合と比べて、はつり深さの差異が殆んどな
い。また水に対するアニオン系高分子剤の添加量が０．
２重量％を越えると、超高圧液発生装置および回転ノズ
ルに障害が発生する。したがって、水に対するアニオン
系高分子剤の添加量を０．０５〜０．２重量％の範囲に
設定する必要がある。When carrying out this invention, if the amount of anionic polymer agent added to water is less than 0.05% by weight, the effect of the viscous liquid cannot be fully exhibited, and only water is injected at ultra-high pressure. There is almost no difference in the chisel depth compared to the case. Also, the amount of anionic polymer agent added to water is 0.
If it exceeds 2% by weight, problems will occur in the ultra-high pressure liquid generator and the rotating nozzle. Therefore, it is necessary to set the amount of anionic polymer agent added to water in the range of 0.05 to 0.2% by weight.
さらにまた、前記ノズル３から噴射されるアニオン系高
分子剤水溶液の圧力は、５００〜２０００ｋｇｆ／ ｃ
ｒＡの範囲が好ましい。Furthermore, the pressure of the anionic polymer agent aqueous solution injected from the nozzle 3 is 500 to 2000 kgf/c.
A range of rA is preferred.
アニオン系高分子剤水溶液を超高圧で噴射するこの発明
のはつり方法と、水を超高圧で噴射する従来のはつり方
法とを比較すると、この発明の場合は、従来の場合の約
４倍の速度でノズルを移動しても同等以上のはつり深さ
を確保できる。Comparing the chipping method of the present invention in which an aqueous anionic polymer agent solution is injected at ultra-high pressure with the conventional chisel method in which water is injected at ultra-high pressure, the chipping method of this invention is approximately four times faster than the conventional method. Even if the nozzle is moved with
また前記従来のはつり方法の場合は、ノズルとはつり対
象物との間隔を１〜２印程度の小間隔に保持すれば所要
のはつり深さが得られるが、ノズルとはつり対象物との
間隔が前記範囲よりも増大すると、はつり深さが急激に
減少する。これに対し、この発明のはつり方法の場合は
、ノズルとはつり対象物との間隔を５ ｃｔｎ程度に大
きく設定しても、ノズルとはつり対象物との間隔を１〜
２ ｃｍ程度の小間隔に設定した従来のはつり方法と同
等以上のはつり深さを得ることができ、したがって、こ
の発明のはつり方法の場合は、ノズルとはつり対象物と
の間隔設定範囲を広くできるので、はつり作業性が向上
する。Furthermore, in the case of the conventional chiseling method, the required chiseling depth can be obtained by keeping the distance between the nozzle and the object to be chiseled at a small distance of about 1 to 2 marks, but the distance between the nozzle and the object to be chiseled is If it increases beyond the above range, the chiseling depth will decrease rapidly. On the other hand, in the case of the chisel method of the present invention, even if the distance between the nozzle and the chisel object is set as large as about 5 ctn, the distance between the nozzle and the chisel object is 1 to 1 ctn.
It is possible to obtain a chisel depth equal to or greater than that of the conventional chisel method in which the spacing is set at a small interval of about 2 cm. Therefore, in the chisel method of the present invention, the range of spacing between the nozzle and the chisel object can be widened. Therefore, the chisel work efficiency is improved.
さらにまた、ノズルとはつり対象物との間隔を５〜１０
ｃｍに設定して、この発明のはつり方法と前記従来のは
つり方法とを実施した場合、従来のはつり方法の場合は
、はつり深さが著しく浅いが、この発明の場合は比較的
深いはつり深さになる。Furthermore, the distance between the nozzle and the object to be spun is set at 5 to 10
cm, and when the chiseling method of the present invention and the conventional chiseling method are carried out, the chiseling depth is extremely shallow in the case of the conventional chiseling method, but the chiseling depth is relatively deep in the case of the present invention. become.
したがって、この発明の場合は、はつり対象物からノズ
ルを比較的大きく離しても、所要深さのはつりを行なう
ことができるので、狭い作業スペースにおいても、はつ
り作業を容易に行なうことができる。Therefore, in the case of the present invention, even if the nozzle is relatively far away from the object to be chiselled, it is possible to chisel to the required depth, and therefore chiseling work can be easily carried out even in a narrow work space.
この発明によれば、アニオン系高分子剤を水に対し０．
０５〜０．２重量％添加してなる適度の粘性を有する高
分子剤水溶液を、ノズル３がら超高圧で噴射して、その
超高圧噴射高分子剤水溶液により鉄筋コンクリート構造
物のコンクリートをはつるので、超高圧水を噴射しては
つる場合に比べて、はつり能力を大きくすることができ
、かつアニオン系高分子剤水溶液により鉄筋の錆び落と
しを行なうので、鉄筋の表面が活性化していても、錆び
落とし後の鉄筋に錆びが著しく発生することはなく、し
かも水に対するアニオン系高分子剤の添加量は０．２重
量％以下であるので、超高圧液発生装置および回転する
ノズルヘッド２に障害が発生することはなく、さらに前
記高分子剤水溶液を噴射する複数のノズル３が中空回転
軸１の周りに回転されるので、高分子剤水溶液の噴射中
を広くして単位時間当りのはつり作業面積を広くするこ
とができ、そのためはつり作業能率を向上させることが
できる等の効果が得られる。According to this invention, the anionic polymer agent is added at 0.0% to water.
A polymer agent aqueous solution having an appropriate viscosity and containing 0.05 to 0.2% by weight is injected from the nozzle 3 at an ultra-high pressure, and the concrete of the reinforced concrete structure is peeled by the ultra-high pressure sprayed polymer agent aqueous solution. , it is possible to increase the chipping ability compared to the method of chiseling by jetting ultra-high pressure water, and since the anionic polymer agent aqueous solution removes rust from the reinforcing bars, even if the surface of the reinforcing bars is activated, There is no significant rust on the reinforcing steel after rust removal, and since the amount of anionic polymer added to the water is less than 0.2% by weight, there is no problem with the ultra-high pressure liquid generator and the rotating nozzle head 2. Furthermore, since the plurality of nozzles 3 that inject the aqueous polymer agent solution are rotated around the hollow rotating shaft 1, the time during which the aqueous polymer agent solution is injected is widened and the chipping work per unit time is reduced. The area can be increased, and therefore, effects such as improved lifting efficiency can be obtained.
第１図はこの発明を実施する場合に使用するはつり装置
の概略側面図、第２図はそのはつり装置におけるノズル
ヘッド付近およびノズル回転装置を示す縦断側面図、第
３図は回転するノズルによるコンクリートはつり状態を
示す断面図、第４図は複数のノズルを有するノズルヘッ
ドの他の例を示す縦断側面図、第５図は第４図に示すノ
ズルを有するノズルヘッドによるコンクリートはつり状
態を示す断面図である。第６図は水に対するアニオン系
高分子剤の添加量とはつり深さとの関係を示す図である
。
図において、１は超高圧液供給用中空回転軸、２はノズ
ルヘッド、３はノズル、４は回転式撹拌器、５は混合槽
、６は給水口、７は粉末状高分子剤溶解器、８は超高圧
液発生装置、９は定量ポンプ、１０は移動フレーム、１
２はケース、１４は超高圧液供給管、１５はスイベルジ
ヨイント、１６はホース、１８は中心軸、２１は超高圧
液供給孔、２２は駆動軸、２３は駆動歯車、２４は従動
歯車、２５は羽根車、２６は回転用超高圧液供給管、２
７は鉄筋コンクリート構造物、３０は鉄何
）６図Fig. 1 is a schematic side view of a chisel device used in carrying out the present invention, Fig. 2 is a vertical cross-sectional side view showing the vicinity of the nozzle head and nozzle rotating device in the chisel device, and Fig. 3 is a concrete removal device using a rotating nozzle. 4 is a longitudinal sectional side view showing another example of a nozzle head having a plurality of nozzles; FIG. 5 is a sectional view showing concrete being lifted by the nozzle head having the nozzles shown in FIG. 4. It is. FIG. 6 is a diagram showing the relationship between the amount of anionic polymer agent added to water and the depth of suspension. In the figure, 1 is a hollow rotating shaft for supplying ultra-high pressure liquid, 2 is a nozzle head, 3 is a nozzle, 4 is a rotary stirrer, 5 is a mixing tank, 6 is a water supply port, 7 is a powdered polymer dissolver, 8 is an ultra-high pressure liquid generator, 9 is a metering pump, 10 is a moving frame, 1
2 is a case, 14 is an ultra-high pressure liquid supply pipe, 15 is a swivel joint, 16 is a hose, 18 is a center shaft, 21 is an ultra-high pressure liquid supply hole, 22 is a drive shaft, 23 is a drive gear, 24 is a driven gear, 25 is an impeller, 26 is an ultra-high pressure liquid supply pipe for rotation, 2
7 is a reinforced concrete structure, 30 is a steel structure) Figure 6
Claims (1)
２に、その中空回転軸１の中心の周囲方向に間隔をおい
て配置された複数のノズル３を設け、前記ノズルヘッド
２を回転しながら、アニオン系高分子剤を水に対し０．
０５〜０．２重量％添加してなる高分子剤水溶液を、前
記各ノズル３から超高圧で噴射して、その超高圧噴射高
分子剤水溶液により鉄筋コンクリート構造物のコンクリ
ートをはつることを特徴とするアニオン系高分子剤水溶
液超高圧噴射による鉄筋コンクリート構造物のはつり方
法。A nozzle head 2 connected to a hollow rotating shaft 1 for supplying ultra-high pressure liquid is provided with a plurality of nozzles 3 arranged at intervals around the center of the hollow rotating shaft 1, and the nozzle head 2 is rotated. However, the anionic polymer agent is added to water at a concentration of 0.
A polymer agent aqueous solution containing 0.05 to 0.2% by weight is injected from each nozzle 3 at an ultra-high pressure, and concrete of a reinforced concrete structure is concreted by the ultra-high pressure injected polymer agent aqueous solution. A method for chiseling reinforced concrete structures using ultra-high pressure injection of an aqueous solution of anionic polymer agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63014587A JP2534088B2 (en) | 1988-01-27 | 1988-01-27 | Reinforcement method of concrete structure with reinforcing bar by ultra-high pressure injection of anionic polymer aqueous solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63014587A JP2534088B2 (en) | 1988-01-27 | 1988-01-27 | Reinforcement method of concrete structure with reinforcing bar by ultra-high pressure injection of anionic polymer aqueous solution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01190879A true JPH01190879A (en) | 1989-07-31 |
| JP2534088B2 JP2534088B2 (en) | 1996-09-11 |
Family
ID=11865298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63014587A Expired - Fee Related JP2534088B2 (en) | 1988-01-27 | 1988-01-27 | Reinforcement method of concrete structure with reinforcing bar by ultra-high pressure injection of anionic polymer aqueous solution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2534088B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010064240A (en) * | 2008-09-15 | 2010-03-25 | Yukihiro Higuchi | Cutting and crushing method by water jet and nozzle device for water jet |
| CN111396009A (en) * | 2020-04-21 | 2020-07-10 | 信达科创（唐山）石油设备有限公司 | Integrated composite overweight injection system and working method thereof |
-
1988
- 1988-01-27 JP JP63014587A patent/JP2534088B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010064240A (en) * | 2008-09-15 | 2010-03-25 | Yukihiro Higuchi | Cutting and crushing method by water jet and nozzle device for water jet |
| CN111396009A (en) * | 2020-04-21 | 2020-07-10 | 信达科创（唐山）石油设备有限公司 | Integrated composite overweight injection system and working method thereof |
| CN111396009B (en) * | 2020-04-21 | 2023-12-12 | 信达科创（唐山）石油设备有限公司 | Integrated composite overweight injection system and working method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2534088B2 (en) | 1996-09-11 |
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