JP2004019132A - High pressure water injector and pressure hose recovering method in high pressure water injector - Google Patents

High pressure water injector and pressure hose recovering method in high pressure water injector Download PDF

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Publication number
JP2004019132A
JP2004019132A JP2002171926A JP2002171926A JP2004019132A JP 2004019132 A JP2004019132 A JP 2004019132A JP 2002171926 A JP2002171926 A JP 2002171926A JP 2002171926 A JP2002171926 A JP 2002171926A JP 2004019132 A JP2004019132 A JP 2004019132A
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Prior art keywords
pressure water
pipe
water injection
hose
pile
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JP3836754B2 (en
Inventor
Akira Nishimura
西村　顕
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TOSA KIKAI KOGYO KK
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TOSA KIKAI KOGYO KK
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  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high pressure water injector and a pressure hose recovering method desirable from the viewpoint of an environment and construction cost without leaving industrial waste in the soil in a construction method for driving a pile in the ground by simultaneously using high pressure water. <P>SOLUTION: This construction method drives the pile in the ground by simultaneously using the high pressure water by fixing high pressure water injection nozzles to the driving pile. The high pressure water injector is provided as a basic means by connecting a pressure water hose 4 for supplying the high pressure water and a pipe 3 attached with the high pressure water injection nozzles 2 and 2 by using a connecting pipe 6 having the slipping-out preventive function by a shear pin 10. An upper end vicinal part of the connecting pipe 6 is threadedly engaged and fixed inside the pressure water hose 4 by a threadably attaching part 7. A step part 9 having a horizontal directional plane part is formed in an almost intermediate part of the connecting pipe 6. The shear pin 10 is inserted so that an inside tip part contacts with an upper surface of the step part 9 by penetrating through a pipe wall from the outside of the pipe 3. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は鋼矢板，鋼管杭，Ｈ鋼杭等の各種杭を地盤内へ打設する際に、打込効果を促進するために圧力水ホースを用いて高圧水を噴射しながら打設作業を行い、打設終了後に圧力水ホースを回収して再使用するようにした高圧水噴射装置及び高圧水噴射装置における圧力ホースの回収方法に関するものである。
【０００２】
【従来の技術】
従来からウォータージェットを利用した杭圧入工法が一般に採用されており、特に油圧式杭圧入引抜機による各種杭の圧入施工におけるウォータージェット併用は、杭を砂質土，礫質地盤に圧入するための補助工法で、施工は導水ホース先端にノズルを取り付けウォータージェットポンプから供給された高圧噴流水をノズルより噴出させ圧力水を軽減させながら、鋼矢板，鋼管矢板，Ｈ鋼杭等の各種杭の打ち込み施工法として利用されている。このウォータージェット併用圧入工法は、圧入に伴って発生する先端抵抗，周面抵抗，継手部の摩擦抵抗をウォータージェットポンプの噴流水により軽減して、杭を無理なく、かつ、精度高く圧入施工することができる。
【０００３】
図７は従来のウォータージェットを利用した杭圧入工法の一例を示す要部拡大正面図であり、鋼管杭１に溶接等により固着された二股状の高圧水噴射ノズル２，２が連結された配管３と圧力水ホース４とをゴム管でなる油圧ホース５を用いて接続しておき、圧力水ホース４から供給される高圧水を高圧水噴射ノズル２，２から噴出させるとともに油圧式杭圧入引抜機を用いて鋼管杭１を地盤中に打設した後に、図８の矢印Ｂに示すように圧力水ホース４を上方に引き上げることにより、油圧ホース５を剪断により分離して圧力水ホース４のみを回収して再使用に供し、高圧水噴射ノズル２，２は地中に残す手段が知られている。
【０００４】
圧力水ホース４とともに高圧水噴射ノズル２，２も回収して再使用する試みも行われているが、圧力水ホース４と高圧水噴射ノズル２，２を一対にして引き上げる際に圧力水ホース４内に高圧水が残っているため、引き上げた圧力水ホース４が水流の反動で跳ねる事態が生じて作業員に対して危険性がある外、鋼管杭１の打設時に高圧水噴射ノズル２，２が損耗するケースが多いため、高圧水噴射ノズル２，２を回収して再使用するメリットが少ないこともあって、該高圧水噴射ノズル２，２を地中に残す方法が一般に用いられている。
【０００５】
【発明が解決しようとする課題】
しかしながら、前記したように油圧ホース５を剪断により分離することによって圧力水ホース４のみを回収する手段は、油圧ホース５の一部を産業廃棄物として土中に残すことになるため、環境上の観点から必ずしも好ましいものではなく、更に費用の面からみても高価な油圧ホースを一回毎に使い捨てにすることは、施工コストを高くしてしまうという問題点がある。
【０００６】
そこで本発明は上記の問題点を解決して、油圧ホース等の産業廃棄物を土中に残すことなく、環境上及び施工コストの観点から好ましい結果が得られる高圧水噴射装置及び高圧水噴射装置における圧力ホースの回収方法を提供することを目的としている。
【０００７】
【課題を解決するための手段】
本発明は上記目的を達成するために、打設する杭に高圧水噴射ノズルを固着して、高圧水を併用して地中に杭を打込む工法において、高圧水を供給する圧力水ホースと高圧水噴射ノズルが付設された配管を、シャーピンにより抜け止め機能を持たせた接続管を用いて連結した高圧水噴射装置を基本手段として提供する。
【０００８】
上記接続管の上端近傍部分を圧力水ホースの内側に螺着部により螺合固定するとともに、該接続管の下端部近傍部分を配管の管壁に形成された円環状溝内に嵌合して密封下に固定してある。また、接続管の略中間部分に水平方向の平面部を有する段部を形成して、配管の外方から管壁を貫通して内方先端部が接続管の段部の上面に接するようにシャーピンを挿通する。
【０００９】
更に打設終了後に圧力水ホースを上方に引き上げる際に接続管の段部の上面に接しているシャーピンを垂直方向の剪断力により破壊して該接続管を圧力水ホースとともに上方に引き上げ、高圧水噴射ノズルのみを杭とともに地盤内に残すようにした高圧水噴射装置における圧力ホースの回収方法を提供する。
【００１０】
かかる高圧水噴射装置及び高圧水噴射装置における圧力ホースの回収方法によれば、各種の杭を地盤内へ打設する際に、圧力水ホースを介して高圧水噴射ノズルから噴出する高圧水を併用して打設を行い、打設終了後に圧力水ホースを上方に引き上げる際に、接続管の段部の上面に接しているシャーピンが垂直方向の剪断力により破壊して接続管が抜去して圧力水ホースとともに上方に引き上げられ、該圧力水ホースは再使用に供されるとともに高圧水噴射ノズルのみが杭とともに地盤内に残される。配管から接続管が抜去した段階で圧力水ホース内に残っている高圧水の圧力が低下するため、引き上げた圧力水ホースが水流の反動で跳ねる事態は発生せず、作業時の安全性が向上する。施工時には安価なシャーピンのみが破壊されるだけであるため、コスト面でも有利であるとともに油圧ホース等の産業廃棄物を土中に残すことがないので、環境上の観点からも好ましい結果が得られる。
【００１１】
【発明の実施の形態】
以下図面に基づいて本発明にかかる高圧水噴射装置及び高圧水噴射装置における圧力ホースの回収方法の実施形態を、従来の構成と同一の構成部分に同一の符号を付して説明する。本発明では打設する杭に高圧水噴射ノズルを固着して、高圧水を併用して地中に杭を打込む工法において、高圧水を供給する圧力水ホースと高圧水噴射ノズルが付設された配管を、シャーピンにより抜け止め機能を持たせた接続管を用いて連結したことが特徴となっている。
【００１２】
図１は本発明にかかる高圧水噴射装置を用いた杭圧入工法の第１実施例を示す要部正面図、図２は図１のＡ−Ａ線に沿う断面図、図３は図２の要部拡大図であり、図中の１は鋼管杭、２，２は鋼管杭１に溶接等により固着された二股状の高圧水噴射ノズル、３は先端部に二股状の高圧水噴射ノズル２，２が付設された配管、４は高圧水を供給するための圧力水ホースであり、この圧力水ホース４と配管３とが接続管６を用いて連結されている。
【００１３】
図３の要部拡大図に示したように、接続管６は上端近傍部分が圧力水ホース４の内側に螺着部７により螺合固定されており、下端部近傍部分が配管３の管壁に形成された円環状溝３ａ内に嵌合され、Ｏリング８を介在して密封下に固定されている。更に接続管６の略中間部分には、水平方向の平面部を有する段部９が形成されている。
【００１４】
１０は配管３の外方から管壁を貫通して挿通されたシャーピンであり、このシャーピン１０の内方先端部が前記接続管６の段部９の上面に接している。従ってシャーピン１０は接続管６と配管３の抜け止め機能を有している。尚、シャーピン１０は図示した１本に限定されず、複数本のシャーピン１０が配管３の外方複数個所から挿通されている。
【００１５】
図４は本発明にかかる高圧水噴射装置を用いた杭圧入工法の第２実施例を示す要部正面図、図５は図４のＢ−Ｂ線に沿う断面図、図６は図５の要部拡大図である。前記第１実施例と同一の構成部分には同一の符号を付してその説明を省略する。この第２実施例では高圧水噴射ノズルは二股状のものではなく、接続管６の下端部近傍部分と嵌合する配管３の管壁に形成された円環状溝３ａの内部に単一の高圧水噴射ノズル２ａが付設されていることが特徴である。
【００１６】
かかる第１実施例及び第２実施例によれば、鋼管杭１を地盤内へ打設する際に、圧力水ホース４を介して高圧水噴射ノズル２，２或いは高圧水噴射ノズル２ａから噴出する高圧水を使用しながら図外の油圧式杭圧入引抜機を用いて鋼管杭１の打設を行い、打設終了後に圧力水ホース４を巻き上げて矢印Ｃに示すように該圧力水ホース４を上方に引き上げる。この時に接続管６の段部９の上面に接しているシャーピン１０の内方先端部が垂直方向の剪断力により破壊して、配管３から接続管６が抜去して圧力水ホース４とともに上方に引き上げられ、配管３に付設された高圧水噴射ノズル２，２或いは高圧水噴射ノズル２ａが鋼管杭１とともに地盤内に残される。
【００１７】
上記動作時において、配管３から接続管６が抜去した段階で圧力水ホース４内に残っている高圧水の圧力が低下するため、引き上げた圧力水ホース４が水流の反動で跳ねる事態は発生せず、作業時の安全性を向上させることができる。そして引き上げた圧力水ホース４は次回の工事施工時に再使用することができる。また、上記の実施例は杭として鋼管杭１を用いているが、その他の鋼矢板，Ｈ鋼杭等の各種杭にも適用可能である。
【００１８】
【発明の効果】
以上詳細に説明したように、本発明によれば各種の杭を高圧水噴射ノズルから噴出する高圧水を併用して地盤内へ打設し、打設終了後に圧力水ホースを上方に引き上げる際に、接続管と高圧水噴射ノズルの配管を抜け止め支持しているシャーピンが剪断力により破壊されることにより、圧力水ホースがスムーズに上方に引き上げられて該圧力水ホースを再使用に供することができる。施工時には安価なシャーピンが破壊されるだけであるため、コスト面でも有利であり、しかも従来から用いられている油圧ホース等の産業廃棄物を土中に残すことがなく、環境上の観点からも好ましい高圧水噴射装置を提供することができる。
【００１９】
上記の作業時において、高圧水噴射ノズルの配管から接続管が抜去した段階で圧力水ホース内に残っている高圧水の圧力が低下するため、引き上げた圧力水ホースが水流の反動で跳ねることがなく、作業時の安全性を向上させることができる。
【００２０】
従って本発明によれば、産業廃棄物を土中に残すことなく、環境上及び施工コストの観点から好ましい高圧水噴射装置及び高圧水噴射装置における圧力ホースの回収方法を提供することができる。
【図面の簡単な説明】
【図１】本発明にかかる高圧水噴射装置を用いた杭圧入工法の一例を示す要部正面図。
【図２】図１のＡ−Ａ線に沿う断面図。
【図３】図２の要部拡大図。
【図４】本発明にかかる高圧水噴射装置を用いた杭圧入工法の他の実施例を示す要部正面図。
【図５】図４のＢ−Ｂ線に沿う断面図。
【図６】図５の要部拡大図。
【図７】従来の杭圧入工法の一例を示す要部拡大正面図。
【図８】図７の杭圧入工法における施工態様例を示す要部拡大正面図。
【符号の説明】
１…鋼管杭
２…高圧水噴射ノズル
３…配管
３ａ…円環状溝
４…圧力水ホース
６…接続管
７…螺着部
９…段部
１０…シャーピン
整理番号　Ｐ３４５３[0001]
TECHNICAL FIELD OF THE INVENTION
When driving various piles, such as steel sheet piles, steel pipe piles, and H steel piles, into the ground, the present invention uses a pressure water hose to spray high-pressure water to promote the driving effect. The present invention relates to a high-pressure water injection device and a method for collecting a pressure hose in a high-pressure water injection device in which a pressure water hose is collected and reused after completion of casting.
[0002]
[Prior art]
Conventionally, a pile press-in method using a water jet has been generally adopted. In particular, when a hydraulic jet press-in and pull-out machine is used together with a water jet in a press-fitting operation of various piles, it is necessary to press the pile into sandy soil or gravel ground. With the auxiliary construction method, installation is performed by installing a nozzle at the tip of the water guide hose, ejecting high pressure jet water supplied from the water jet pump from the nozzle to reduce the pressure water, and driving various piles such as steel sheet pile, steel pipe sheet pile, H steel pile, etc. It is used as a construction method. With this water jet combined press-fitting method, the tip resistance, peripheral surface resistance, and frictional resistance of the joint part, which are generated by press-fitting, are reduced by the jet water of the water jet pump, and the pile is pressed in with ease and with high accuracy. be able to.
[0003]
FIG. 7 is an enlarged front view of an essential part showing an example of a conventional pile press-in method using a water jet, and is a pipe connected to a forked high-pressure water jet nozzle 2, 2 fixed to a steel pipe pile 1 by welding or the like. 3 and a pressure water hose 4 are connected by using a hydraulic hose 5 made of a rubber pipe, and high-pressure water supplied from the pressure water hose 4 is jetted from the high-pressure water jet nozzles 2 and 2 and a hydraulic pile press-in / pull-out. After the steel pipe pile 1 is driven into the ground using a machine, the hydraulic water hose 4 is pulled up as shown by the arrow B in FIG. There is a known means for collecting and reusing the remaining high pressure water jet nozzles 2 and 2 in the ground.
[0004]
Attempts have also been made to collect and reuse the high-pressure water injection nozzles 2 and 2 together with the high-pressure water hose 4. Since the high-pressure water remains in the inside, there is a danger to workers due to the fact that the raised pressure water hose 4 rebounds due to the reaction of the water flow. In many cases, there is little merit in collecting and reusing the high-pressure water injection nozzles 2 and 2 because the high-pressure water injection nozzles 2 and 2 are worn, and a method of leaving the high-pressure water injection nozzles 2 and 2 in the ground is generally used. I have.
[0005]
[Problems to be solved by the invention]
However, as described above, the means for recovering only the pressure water hose 4 by separating the hydraulic hose 5 by shearing causes a part of the hydraulic hose 5 to remain in the soil as industrial waste. It is not always preferable from the viewpoint, and in view of the cost, disposing of the expensive hydraulic hose as a disposable at each time increases the construction cost.
[0006]
Therefore, the present invention solves the above-mentioned problems, and a high-pressure water injection device and a high-pressure water injection device capable of obtaining favorable results from the viewpoint of environmental and construction costs without leaving industrial waste such as hydraulic hoses in the soil. It is an object of the present invention to provide a method for collecting a pressure hose in the above.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a method of fixing a high pressure water injection nozzle to a pile to be cast, and driving a pile into the ground using high pressure water together with a pressure water hose for supplying high pressure water. A high-pressure water injection device is provided as a basic means, in which a pipe provided with a high-pressure water injection nozzle is connected using a connection pipe having a retaining function with a shear pin.
[0008]
A portion near the upper end of the connection pipe is screwed and fixed to the inside of the pressure water hose with a screw portion, and a portion near the lower end of the connection pipe is fitted into an annular groove formed in the pipe wall of the pipe. It is fixed under sealing. In addition, a step having a horizontal plane portion is formed at a substantially intermediate portion of the connection pipe, so that the inner end portion penetrates the pipe wall from the outside of the pipe so that the inner tip comes into contact with the upper surface of the step of the connection pipe. Insert the shear pin.
[0009]
Furthermore, when the pressure water hose is pulled upward after the casting, the shear pin in contact with the upper surface of the step portion of the connection pipe is broken by a vertical shear force, and the connection pipe is pulled upward together with the pressure water hose, and the high pressure water Provided is a method for collecting a pressure hose in a high-pressure water injection device in which only an injection nozzle is left in the ground together with a pile.
[0010]
According to such a high-pressure water injection device and a method for collecting a pressure hose in the high-pressure water injection device, when driving various piles into the ground, the high-pressure water ejected from the high-pressure water injection nozzle through the pressure water hose is used in combination. When the pressure water hose is pulled up after completion of the casting, the shear pin in contact with the upper surface of the step of the connecting pipe is broken by the shear force in the vertical direction and the connecting pipe is pulled out. The pressure water hose is pulled up together with the water hose, and the pressure water hose is reused, and only the high-pressure water injection nozzle is left in the ground together with the pile. Since the pressure of the high-pressure water remaining in the pressure water hose drops when the connection pipe is removed from the pipe, the raised pressure water hose does not bounce due to the recoil of the water flow, improving work safety. I do. Since only inexpensive shear pins are destroyed during construction, it is advantageous in terms of cost and also does not leave industrial waste such as hydraulic hoses in the soil, so favorable results can be obtained from an environmental point of view. .
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a high-pressure water injection device and a method of collecting a pressure hose in the high-pressure water injection device according to the present invention will be described with reference to the drawings, in which the same components as those of the conventional configuration are denoted by the same reference numerals. In the present invention, a high-pressure water injection nozzle is fixed to a pile to be cast, and a method for driving a pile into the ground using high-pressure water together with the high-pressure water is provided with a pressure water hose for supplying high-pressure water and a high-pressure water injection nozzle. It is characterized in that the pipes are connected using connection pipes having a retaining function by means of shear pins.
[0012]
FIG. 1 is a front view of an essential part showing a first embodiment of a pile press-fitting method using a high-pressure water injection device according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. FIG. 2 is an enlarged view of a main part, in which 1 is a steel pipe pile, 2 and 2 are a forked high-pressure water injection nozzle fixed to the steel pipe pile 1 by welding or the like, and 3 is a forked high-pressure water injection nozzle 2 at the tip. , 2 are pressure water hoses for supplying high-pressure water, and the pressure water hose 4 and the pipe 3 are connected to each other using a connection pipe 6.
[0013]
As shown in the main part enlarged view of FIG. 3, the connection pipe 6 has a portion near the upper end screwed inside the pressure water hose 4 by a screwing portion 7, and a portion near the lower end is a pipe wall of the pipe 3. Is fixed in a hermetically sealed manner with an O-ring 8 interposed therebetween. Further, a step portion 9 having a horizontal plane portion is formed at a substantially intermediate portion of the connection pipe 6.
[0014]
Reference numeral 10 denotes a shear pin inserted through the pipe wall from the outside of the pipe 3, and an inner end of the shear pin 10 is in contact with the upper surface of the step 9 of the connection pipe 6. Therefore, the shear pin 10 has a function of preventing the connection pipe 6 and the pipe 3 from coming off. Note that the number of the shear pins 10 is not limited to one illustrated, and a plurality of the shear pins 10 are inserted from a plurality of locations outside the pipe 3.
[0015]
FIG. 4 is a front view of a main part showing a second embodiment of the pile press-in method using the high-pressure water injection device according to the present invention, FIG. 5 is a cross-sectional view taken along the line BB of FIG. 4, and FIG. It is a principal part enlarged view. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In this second embodiment, the high-pressure water injection nozzle is not of a forked shape, but a single high-pressure water injection nozzle is formed in an annular groove 3a formed in the pipe wall of the pipe 3 fitted to a portion near the lower end of the connection pipe 6. It is characterized in that a water injection nozzle 2a is provided.
[0016]
According to the first embodiment and the second embodiment, when the steel pipe pile 1 is driven into the ground, the steel pipe pile 1 is ejected from the high-pressure water injection nozzles 2 and 2 or the high-pressure water injection nozzle 2a via the pressure water hose 4. The steel pipe pile 1 is driven using a hydraulic pile press-in / draw-out machine (not shown) while using high-pressure water, and after the driving is completed, the pressure water hose 4 is wound up and the pressure water hose 4 is connected as shown by arrow C. Pull up. At this time, the inward tip of the shear pin 10 which is in contact with the upper surface of the step 9 of the connecting pipe 6 is broken by the shearing force in the vertical direction, and the connecting pipe 6 is pulled out of the pipe 3 and rises together with the pressure water hose 4. The high-pressure water injection nozzles 2 and 2 or the high-pressure water injection nozzle 2 a attached to the pipe 3 are left in the ground together with the steel pipe pile 1.
[0017]
At the time of the above operation, the pressure of the high-pressure water remaining in the pressure water hose 4 at the stage when the connection pipe 6 is removed from the pipe 3 is reduced. Therefore, safety during work can be improved. The raised pressure water hose 4 can be reused in the next construction. In the above embodiment, the steel pipe pile 1 is used as the pile, but the present invention can be applied to various piles such as other steel sheet piles and H steel piles.
[0018]
【The invention's effect】
As described in detail above, according to the present invention, when various piles are driven into the ground together with high-pressure water jetted from the high-pressure water injection nozzle, and when the pressure water hose is pulled up after the driving is completed, The shearing pin, which holds the connection pipe and the pipe of the high-pressure water jet nozzle, is broken by shearing force, so that the pressure water hose can be smoothly pulled up and the pressure water hose can be reused. it can. During construction, only the inexpensive shear pin is destroyed, which is advantageous in terms of cost.In addition, no industrial waste such as hydraulic hoses conventionally used remains in the soil, and from an environmental point of view. A preferred high-pressure water injection device can be provided.
[0019]
At the time of the above work, the pressure of the high-pressure water remaining in the pressure-water hose decreases at the stage when the connection pipe is removed from the high-pressure water-injection nozzle pipe. Therefore, safety during work can be improved.
[0020]
Therefore, according to the present invention, it is possible to provide a high-pressure water injection device and a method of collecting a pressure hose in the high-pressure water injection device that are preferable from the viewpoint of environment and construction cost without leaving industrial waste in the soil.
[Brief description of the drawings]
FIG. 1 is a front view of an essential part showing an example of a pile press-in method using a high-pressure water injection device according to the present invention.
FIG. 2 is a sectional view taken along the line AA in FIG. 1;
FIG. 3 is an enlarged view of a main part of FIG. 2;
FIG. 4 is a main part front view showing another embodiment of the pile press-in method using the high-pressure water injection device according to the present invention.
FIG. 5 is a sectional view taken along the line BB in FIG. 4;
FIG. 6 is an enlarged view of a main part of FIG. 5;
FIG. 7 is an enlarged front view showing an example of a conventional pile press-in method.
FIG. 8 is an enlarged front view of an essential part showing an example of a construction mode in the pile press-fitting method of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Steel pipe pile 2 ... High pressure water injection nozzle 3 ... Piping 3a ... Annular groove 4 ... Pressure water hose 6 ... Connection pipe 7 ... Threaded part 9 ... Step part 10 ... Sher pin reference number P3453

Claims (5)

打設する杭に高圧水噴射ノズルを固着して、高圧水を併用して地中に杭を打込む工法において、
高圧水を供給する圧力水ホースと高圧水噴射ノズルが付設された配管を、シャーピンにより抜け止め機能を持たせた接続管を用いて連結したことを特徴とする高圧水噴射装置。In a construction method in which a high-pressure water injection nozzle is fixed to the pile to be cast and the pile is driven into the ground using high-pressure water,
A high-pressure water injection device wherein a pressure water hose for supplying high-pressure water and a pipe provided with a high-pressure water injection nozzle are connected to each other using a connection pipe having a retaining function with a shear pin. 接続管の上端近傍部分を圧力水ホースの内側に螺着部により螺合固定するとともに、該接続管の下端部近傍部分を配管の管壁に形成された円環状溝内に嵌合して密封下に固定した請求項１に記載の高圧水噴射装置。A portion near the upper end of the connection pipe is screwed and fixed to the inside of the pressure water hose with a threaded portion, and a portion near the lower end of the connection pipe is fitted and sealed in an annular groove formed in the pipe wall of the pipe. The high-pressure water injection device according to claim 1, which is fixed below. 前記接続管の略中間部分に水平方向の平面部を有する段部を形成して、配管の外方から管壁を貫通して内方先端部が接続管の段部の上面に接するようにシャーピンを挿通した請求項１又は２に記載の高圧水噴射装置。A step portion having a horizontal plane portion is formed at a substantially intermediate portion of the connection pipe, and a shear pin is formed so as to penetrate the pipe wall from the outside of the pipe so that an inward end comes into contact with the upper surface of the connection pipe step. The high-pressure water injection device according to claim 1, wherein 打設する杭に高圧水噴射ノズルを固着して、高圧水を併用して地中に杭を打込む工法において、
高圧水を供給する圧力水ホースと高圧水噴射ノズルが付設された配管を、シャーピンにより抜け止め機能を持たせた接続管を用いて連結し、打設終了後にシャーピンを垂直方向の剪断力により破壊して圧力水ホースを上方に引き上げ、高圧水噴射ノズルを杭とともに地盤内に残すことを特徴とする高圧水噴射装置における圧力ホースの回収方法。In a construction method in which a high-pressure water injection nozzle is fixed to the pile to be cast and the pile is driven into the ground using high-pressure water,
The piping with the high-pressure water hose and the high-pressure water jet nozzle is connected using a connection pipe with a retaining function with a shear pin, and after the driving is completed, the shear pin is destroyed by the vertical shear force. And recovering the pressure hose in the high-pressure water injection device, wherein the high-pressure water injection nozzle is lifted upward and the high-pressure water injection nozzle is left in the ground together with the pile. 打設する杭に高圧水噴射ノズルを固着して、高圧水を併用して地中に杭を打込む工法において、
高圧水を供給する圧力水ホースと高圧水噴射ノズルが付設された配管を、シャーピンにより抜け止め機能を持たせた接続管を用いて連結し、打設終了後に圧力水ホースを上方に引き上げる際に接続管の段部の上面に接しているシャーピンを垂直方向の剪断力により破壊して該接続管を圧力水ホースとともに上方に引き上げ、高圧水噴射ノズルを杭とともに地盤内に残すことを特徴とする高圧水噴射装置における圧力ホースの回収方法。In a construction method in which a high-pressure water injection nozzle is fixed to the pile to be cast and the pile is driven into the ground using high-pressure water,
When connecting the pressure water hose that supplies high pressure water and the piping with the high pressure water injection nozzle using a connection pipe that has a retaining function with a shear pin, when pulling up the pressure water hose after completion of casting The shear pin in contact with the upper surface of the step of the connecting pipe is broken by shearing force in the vertical direction, the connecting pipe is pulled upward together with the pressure water hose, and the high pressure water injection nozzle is left in the ground together with the pile. A method for collecting a pressure hose in a high-pressure water injection device.
JP2002171926A 2002-06-12 2002-06-12 High pressure water injection device and method for recovering pressure hose in high pressure water injection device Expired - Fee Related JP3836754B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014203858A1 (en) * 2013-06-19 2014-12-24 新日鐵住金株式会社 Steel-pipe pile and steel-pipe pile construction method
CN112982407A (en) * 2021-03-29 2021-06-18 江苏诚晖工程技术有限公司 Auxiliary pile sinking device for prefabricated hollow pile
CN116065583A (en) * 2023-03-07 2023-05-05 山东海盛海洋工程集团有限公司 Large-pipe-diameter spray pile sinking equipment and method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014203858A1 (en) * 2013-06-19 2014-12-24 新日鐵住金株式会社 Steel-pipe pile and steel-pipe pile construction method
JPWO2014203858A1 (en) * 2013-06-19 2017-02-23 新日鐵住金株式会社 Steel pipe pile and steel pipe pile construction method
CN112982407A (en) * 2021-03-29 2021-06-18 江苏诚晖工程技术有限公司 Auxiliary pile sinking device for prefabricated hollow pile
CN112982407B (en) * 2021-03-29 2023-10-24 江苏诚晖工程技术有限公司 Auxiliary pile sinking device for prefabricated hollow pile
CN116065583A (en) * 2023-03-07 2023-05-05 山东海盛海洋工程集团有限公司 Large-pipe-diameter spray pile sinking equipment and method
CN116065583B (en) * 2023-03-07 2023-06-27 山东海盛海洋工程集团有限公司 Large-pipe-diameter spray pile sinking equipment and method

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