JP3047330U - Sheet pile driving equipment - Google Patents
Sheet pile driving equipmentInfo
- Publication number
- JP3047330U JP3047330U JP1997008385U JP838597U JP3047330U JP 3047330 U JP3047330 U JP 3047330U JP 1997008385 U JP1997008385 U JP 1997008385U JP 838597 U JP838597 U JP 838597U JP 3047330 U JP3047330 U JP 3047330U
- Authority
- JP
- Japan
- Prior art keywords
- compressed air
- compressed
- nozzle
- sheet pile
- water
- 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
Links
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
(57)【要約】
【課題】 比較的安価にして、打込み効率を向上する。
【解決手段】 鋼矢板11に沿って外管22と内管23とから
なる二重管21を設ける。外管22の下端に圧縮空気用ノズ
ル27を設け、内管23の下端に圧縮水用ノズル26を設け
る。この圧縮水用ノズル26の下端を外管22内又は圧縮空
気用ノズル27内に配置すると共に、該圧縮水用ノズル27
の下端を前記圧縮空気用ノズル27の下端より上方に設け
る。圧縮水の勢いにより、圧縮水より低圧な圧縮空気を
良好に噴射することができる。
(57) [Summary] [PROBLEMS] To improve driving efficiency by making it relatively inexpensive. A double pipe (21) including an outer pipe (22) and an inner pipe (23) is provided along a steel sheet pile (11). A nozzle 27 for compressed air is provided at a lower end of the outer tube 22, and a nozzle 26 for compressed water is provided at a lower end of the inner tube 23. The lower end of the compressed water nozzle 26 is disposed in the outer pipe 22 or the compressed air nozzle 27, and the compressed water nozzle 27
Is provided above the lower end of the compressed air nozzle 27. By the force of the compressed water, compressed air having a lower pressure than the compressed water can be satisfactorily injected.
Description
【０００１】[0001]
本考案は、鋼矢板等の矢板の打設装置に関する。 The present invention relates to a sheet pile driving device such as a steel sheet pile.
【０００２】[0002]
鋼矢板等の矢板の打設工法において、例えば鋼矢板の打設工法として、静加重 により打込む圧入引抜機や、振動により打込むバイブロハンマ等を用いる工法が 知られている。また、鋼矢板の打込み長さや地盤等の条件により、それらの工法 に所謂ウォータジェットが併用されている。このウォータジェットを用いる工法 では、鋼矢板に沿ってパイプを取付け、このパイプの下端にノズルを設けると共 に、パイプの上端をポンプに接続し、このポンプから圧送された圧縮水を前記ノ ズルにより絞って噴射するものであり、この噴射水により鋼矢板の下端側が掘ら れると共に、その水に混ざって砂などが地上に排出される。 As a method of placing a sheet pile such as a steel sheet pile, for example, as a method of placing a steel sheet pile, a method using a press-in / draw-out machine driven by static load, a vibratory hammer driven by vibration, or the like is known. Depending on the conditions such as the driving length of steel sheet pile and the ground, so-called water jets are used in combination with these methods. In this method using a water jet, a pipe is attached along a steel sheet pile, a nozzle is provided at the lower end of the pipe, the upper end of the pipe is connected to a pump, and the compressed water pumped from the pump is supplied to the nozzle. The lower end side of the steel sheet pile is dug by this water, and sand and the like are discharged to the ground while being mixed with the water.
【０００３】[0003]
上記ウォータジェットを用いる工法では、高圧な噴射水により鋼矢板下端部と 地盤との応力増加を抑制して打込み抵抗を軽減することができ、特に、シルト礫 層や砂礫層などにおいては、公知ではないが、圧力及ぶ噴射量を制御した噴射を 行うと、土粒子間の間隙水圧を高めることによって土粒子が移動し、鋼矢板下方 の石や岩等の礫を移動させて打込みを容易にすることができる。ところが、石や 岩相互が砂や粘土などの土粒子により強固に固定された礫質層などに鋼矢板が当 たると、打込み効率が低下してしまうため、従来では、噴射水の圧力及び噴射量 を増加することにより、これを防止しようとしていたが、仮に圧送用のポンプを ２台に増やしても思ったように打込み効率を高めることはできなかった。 In the method using the water jet, the high-pressure jet water can suppress the increase in stress between the lower end of the steel sheet pile and the ground to reduce the driving resistance.In particular, in the case of silt gravels and gravel, etc. However, when injection is performed with controlled pressure and injection volume, the soil particles move by increasing the pore water pressure between the soil particles, and the stones and rocks, etc. under the steel sheet pile are moved to facilitate the driving. be able to. However, if a steel sheet pile hits a gravel layer or the like in which stones and rocks are firmly fixed by soil particles such as sand or clay, the driving efficiency will decrease. However, even if the number of pumps for pumping was increased to two, the driving efficiency could not be improved as expected.
【０００４】 図１１（Ａ）（Ｂ）の断面説明図は、礫質層などにおいて、矢板である鋼矢板 １の下端に設けたノズル２から、圧縮水３を噴射した状態を示し、図１１（Ａ） に示すように、前記ノズル２から噴射した圧縮水３により礫６を取り巻く土粒子 は、矢印５に示すように、水と供に鋼矢板１を伝わって地上に排出され、地盤に 掘削孔４が形成される。しかし、圧縮水３の影響を受けない石や岩の破片等の礫 ６を除去することはできず、複数の礫６からなる大径の固まり８がそのままで残 るため、鋼矢板１の打込みの妨げとなる。そこで、圧縮水３の圧力及び噴射量を 増加すると、図１１（Ｂ）の断面に示すように、前記掘削孔４が深くなり、多量 の土粒子７が水と供に鋼矢板１を伝わって地上に排出されるが、逆に、大きく形 成された掘削孔４の底部に、圧縮水３の影響を受けない複数の礫６からなる固ま り８が堆積するため、鋼矢板１の打込みが困難になり、また、圧縮水３の圧力と 噴射量を増加しても、掘削孔４が深くなり、この掘削孔４の底部に礫６が堆積し 、圧縮水の圧力を上述したように仮に２倍にしても、圧縮水に係わる装置とコス トが上昇するだけで、それに見合った打込み効率の向上を図ることができず、場 合によっては打込み効率が低下することが予想される。FIGS. 11A and 11B are cross-sectional views showing a state in which compressed water 3 is jetted from a nozzle 2 provided at the lower end of a steel sheet pile 1 as a sheet pile in a gravel layer or the like. As shown in (A), the soil particles surrounding the gravel 6 by the compressed water 3 injected from the nozzle 2 are discharged to the ground along with the water along the steel sheet pile 1 as shown by an arrow 5, and A drill hole 4 is formed. However, it is not possible to remove the pebbles 6 such as stones and rock fragments which are not affected by the compressed water 3, and the large-diameter mass 8 composed of a plurality of pebbles 6 remains as it is. Hinders Therefore, when the pressure and the injection amount of the compressed water 3 are increased, as shown in the cross section of FIG. 11B, the excavation hole 4 is deepened, and a large amount of soil particles 7 travel along the steel sheet pile 1 with the water. Although discharged to the ground, conversely, a mass 8 of a plurality of gravels 6 unaffected by the compressed water 3 accumulates at the bottom of the well-formed excavation hole 4, so that the steel sheet pile 1 is driven. In addition, even if the pressure and the injection amount of the compressed water 3 are increased, the drilling hole 4 becomes deeper, the gravel 6 accumulates at the bottom of the drilling hole 4, and the pressure of the compressed water is increased as described above. Even if it is doubled, only the cost and the equipment related to the compressed water will increase, but it will not be possible to improve the driving efficiency correspondingly, and in some cases, the driving efficiency is expected to decrease.
【０００５】 そこで、このような圧縮水を使用する装置の欠点を解消するため、特開昭６０ −１５９２１７号公報には、土中に打ち込む杭に沿わせて給水管を配置し、この 給水管に高圧水を供給しながら杭打ちを行う方法において、上記給水管の外側に その給水管と長さのほぼ等しい給気管を配置し、この給気管に圧縮空気を送気す る（公報第１欄第５〜10行）装置が提案され、この装置では給水ノズルを給気ノ ズルより下方に設け（公報第１図及び第２図）、また、この公報の従来技術の欄 には、噴水口と噴気口とを同一位置に設けた（公報第１図）ものが記載されてい る。[0005] In order to solve the drawbacks of the apparatus using compressed water, Japanese Patent Application Laid-Open No. 60-159217 discloses a method of disposing a water supply pipe along a pile driven into the soil. In the method of staking while supplying high-pressure water to a water supply pipe, an air supply pipe having a length substantially equal to that of the water supply pipe is disposed outside the water supply pipe, and compressed air is supplied to the air supply pipe (Japanese Patent No. Columns 5 to 10) A device has been proposed, in which a water supply nozzle is provided below the air supply nozzle (FIGS. 1 and 2). The publication describes that the mouth and the fumarole are provided at the same position (FIG. 1).
【０００６】 しかし、前記特開昭６０−１５９２１７号公報に示されている圧縮水と圧縮空 気とを同時に噴射できる装置では、圧縮水の噴射により杭の下方を掘削し、この 掘削孔の底部に届くように圧縮空気を噴射し、前記掘削孔内の礫が前記圧縮空気 により揺動及び上下動することにより、杭を打ち込み抵抗を効果的に削減するこ とができるが、一般に圧縮水より低圧な圧縮空気を噴射するため、上記のように 噴水口と噴気口都が同一高さあるいは前記給水ノズルが給気ノズルより下方に位 置して設けられているものでは、圧縮空気と圧縮水との圧力差により、給気ノズ ルに前記掘削孔内の水が逆流し、空気を掘削孔の底部まで十分に供給できないと いう問題がある。この問題を解決するために、同一出願人は、特開平９−２５６ ２９号において、圧縮空気用ノズルを圧縮水用ノズルの下端位置とほぼ同一か、 圧縮空気用ノズルを圧縮水用ノズルより下方に設けること（公報第００１８欄） を提案しており、現場に合った使い易いノズルが望まれている。However, in the device disclosed in Japanese Patent Application Laid-Open No. 60-159217, which can simultaneously inject compressed water and compressed air, the lower part of the pile is excavated by injection of compressed water, and the bottom of the excavation hole is excavated. The compressed air is injected to reach the ground, and the gravel in the borehole oscillates and moves up and down by the compressed air, thereby effectively driving the pile and effectively reducing the resistance. In order to inject low-pressure compressed air, if the fountain port and the blast port are provided at the same height as described above or the water supply nozzle is provided below the air supply nozzle, the compressed air and compressed water There is a problem that the water in the borehole flows backward to the air supply nozzle due to the pressure difference between the borehole and the air supply nozzle, and air cannot be sufficiently supplied to the bottom of the borehole. In order to solve this problem, in Japanese Patent Application Laid-Open No. 9-25629, the same applicant has disclosed that the compressed air nozzle is substantially the same as the lower end position of the compressed water nozzle, or the compressed air nozzle is located below the compressed water nozzle. (Publication column 0018), and an easy-to-use nozzle suitable for the site is desired.
【０００７】 そこで、本考案は、比較的安価にして、打込み効率を向上することができ、現 場に合った使い易いノズルを備えた矢板の打設装置を提供することを目的とする 。Accordingly, an object of the present invention is to provide a sheet pile driving apparatus having a nozzle which is relatively inexpensive, can improve driving efficiency, and has an easy-to-use nozzle suitable for the field.
【０００８】[0008]
請求項１の打設装置は、矢板を地中に打込む打込み装置と、前記矢板の下端に 設けられ圧縮水を噴射する圧縮水用ノズルと、この圧縮水用ノズルに圧縮水を供 給する圧縮水供給装置と、前記矢板の下端に設けられ前記圧縮水より低圧な圧縮 空気を噴射する圧縮空気用ノズルと、この圧縮空気用ノズルに圧縮空気を供給す る圧縮空気供給装置とを備え、前記矢板に沿って外管と内管とからなる二重管を 設け、前記内管内に圧縮水路を形成すると共に、前記外管と前記内管との間に圧 縮空気路を形成し、前記圧縮水路に前記圧縮水供給装置を接続すると共に、前記 圧縮空気路に前記圧縮空気供給装置を接続し、前記圧縮水路の下端に前記圧縮水 用ノズルを設けると共に、前記圧縮空気路の下端に前記圧縮空気用ノズルを設け 、前記圧縮水用ノズルの下端を前記外管内又は前記圧縮空気用ノズル内に配置す ると共に、該圧縮水用ノズルの下端を前記圧縮空気用ノズルの下端より上方に設 けたものであり、圧縮水用ノズルから圧縮水を噴射し、この圧縮水により矢板の 下端に土粒子の取り除かれた掘削孔が形成され、同時に、圧縮空気用ノズルから 圧縮空気を噴射すると、この圧縮空気と圧縮水とにより前記掘削孔内に溜った礫 が振動すると共に、該圧縮空気が泡となって上昇する際に礫単体を上下に揺動し 、礫同志の間隙を作り出すことにより、矢板の打込み抵抗が低下する。また、圧 縮空気用ノズルの下端を圧縮水用ノズルの下端より下方に設けたから、圧縮水よ り低圧な圧縮空気を良好に噴射することができる。さらに、圧縮空気用ノズルよ り細い圧縮空気用ノズルの下端を、外管内又は圧縮空気用ノズル内に配置したか ら、掘削において細いノズルの損傷を防止できる。 According to a first aspect of the present invention, there is provided a driving device for driving a sheet pile into the ground, a nozzle for compressed water provided at a lower end of the sheet pile for spraying compressed water, and supplying compressed water to the nozzle for compressed water. A compressed water supply device, a compressed air nozzle provided at a lower end of the sheet pile for injecting compressed air having a lower pressure than the compressed water, and a compressed air supply device for supplying compressed air to the compressed air nozzle. A double pipe consisting of an outer pipe and an inner pipe is provided along the sheet pile, a compressed water path is formed in the inner pipe, and a compressed air path is formed between the outer pipe and the inner pipe. The compressed water supply device is connected to the compressed water passage, the compressed air supply device is connected to the compressed air passage, the compressed water nozzle is provided at a lower end of the compressed water passage, and the compressed water passage is provided at a lower end of the compressed air passage. Providing a nozzle for compressed air; The lower end of the nozzle is disposed in the outer tube or the compressed air nozzle, and the lower end of the compressed water nozzle is provided above the lower end of the compressed air nozzle. When water is injected, the compressed water forms an excavation hole at the lower end of the sheet pile from which soil particles have been removed, and at the same time, when compressed air is injected from the compressed air nozzle, the compressed air and compressed water cause The gravels accumulated in the pit vibrate, and when the compressed air rises as a bubble, the gravels oscillate up and down to create a gap between the gravels, thereby reducing the driving resistance of the sheet pile. Further, since the lower end of the compressed air nozzle is provided below the lower end of the compressed water nozzle, compressed air having a lower pressure than the compressed water can be satisfactorily injected. Further, since the lower end of the compressed air nozzle smaller than the compressed air nozzle is arranged in the outer pipe or the compressed air nozzle, damage to the thin nozzle during excavation can be prevented.
【０００９】 また、請求項２の考案は、前記圧縮水用ノズルの噴射口より前記圧縮空気用ノ ズルの噴射口が大きなものであり、圧縮空気より高圧な圧縮水が小さい噴射口か ら噴射され、下方の圧縮空気用ノズルの中央側を通って矢板の下方に噴射され、 この中央側の圧縮水の流れに引っ張られるようにして前記圧縮水流れの回りの圧 縮空気が圧縮空気用ノズルの外部に噴射される。Further, the invention of claim 2 is that the injection port of the compressed air nozzle is larger than the injection port of the compressed water nozzle, and the compressed water having a higher pressure than the compressed air is injected from the small injection port. Then, the compressed air is injected into the lower part of the sheet pile through the center of the lower compressed air nozzle, and is pulled by the compressed water flow on the center side, so that the compressed air around the compressed water flow is compressed air nozzle. It is injected outside.
【００１０】 さらに、請求項３の考案は、前記圧縮空気路と前記圧縮空気用ノズルの噴射口 との間に、前記圧縮空気を前記圧縮空気用ノズルの中央側に案内する案内空気路 を形成したものであり、案内空気路により、圧縮空気用ノズルの中央側を流れる 圧縮水に、圧縮空気の一部が混合されて圧縮空気用ノズルの外部に噴射され、空 気の混ざった圧縮水を噴射することができる。Further, according to the invention of claim 3, a guide air passage is formed between the compressed air passage and the injection port of the compressed air nozzle for guiding the compressed air to the center side of the compressed air nozzle. A part of the compressed air is mixed with the compressed water flowing through the center side of the compressed air nozzle by the guide air passage, and is injected outside the compressed air nozzle. Can be sprayed.
【００１１】 さらにまた、請求項４の考案は、前記圧縮水用ノズルにテーパ状外周面を形成 すると共に、前記圧縮空気用ノズルにテーパ状内周面を形成し、それらテーパ状 内周面とテーパ状外周面との間に、下方に向かって縮小するテーパ状の前記案内 空気路を設けたものであり、圧縮水用ノズルと圧縮空気用ノズルとを組み合わせ ることによりテーパ状の空気案内路を形成することができる。[0011] Furthermore, in the invention of claim 4, a tapered outer peripheral surface is formed on the compressed water nozzle, and a tapered inner peripheral surface is formed on the compressed air nozzle. The tapered guide air path is provided between the tapered outer peripheral surface and the tapered guide air path, and the tapered air guide path is formed by combining a compressed water nozzle and a compressed air nozzle. Can be formed.
【００１２】 しかも、請求項５の考案は、前記案内空気路の断面積が前記圧縮空気路の断面 積以上であり、圧縮空気が空気案内路を通って圧縮空気用ノズル内へ流れる際の 抵抗が少なくなる。[0012] In addition, the invention according to claim 5 is characterized in that the cross-sectional area of the guide air passage is equal to or larger than the cross-sectional area of the compressed air passage, and the resistance of the compressed air flowing through the air guide passage into the nozzle for compressed air is reduced. Is reduced.
【００１３】 また、請求項６の考案は、前記外管の下端に前記圧縮空気用ノズルを長さ方向 から螺合したものであり、圧縮空気用ノズルの螺合位置を調整することにより、 テーパ状外周面に対するテーパ状内周面の位置を調整して案内空気路の断面積を 調整することができる。The invention of claim 6 is that the compressed air nozzle is screwed to the lower end of the outer tube from the longitudinal direction. By adjusting the screwing position of the compressed air nozzle, the taper is reduced. The cross-sectional area of the guide air passage can be adjusted by adjusting the position of the tapered inner peripheral surface with respect to the outer peripheral surface.
【００１４】 さらに、請求項７の考案は、前記案内空気路と前記圧縮空気用ノズルの噴射口 との間が、該圧縮空気用ノズルの噴射口の直径より長いものであり、案内空気路 と前記圧縮空気用ノズルの噴射口との間が比較的長いから、この間を通る際に、 圧縮水に圧縮空気が混ざると共に、圧縮水の流れに引っ張られて圧縮空気が良好 に噴射される。Further, according to the invention of claim 7, the distance between the guide air passage and the injection port of the compressed air nozzle is longer than the diameter of the injection port of the compressed air nozzle. Since the distance between the injection port of the compressed air nozzle and the nozzle is relatively long, the compressed air is mixed with the compressed water when passing through the space, and the compressed air is pulled by the flow of the compressed water so that the compressed air is injected well.
【００１５】[0015]
以下、本考案の実施例を添付図面を参照して説明する。図１ないし図７は本考 案の第１実施例を示し、この第１実施例では、矢板である鋼矢板に静加重を加え て打込む杭圧入引込機に本考案を適用した例を示し、複数の鋼矢板11からなる鋼 矢板壁12には、杭圧入引抜機13が固定され、この打込み装置たる杭圧入引抜機13 は、その下部に複数の前記鋼矢板11を挟持する固定脚部14を備え、この固定脚部 14は、移動装置（図示せず）により前記鋼矢板壁12の長さ方向に移動可能に設け られており、前記固定脚部14の下部に設けた複数の挟持部14Ａが前記鋼矢板壁12 を挟持することにより前記鋼矢板壁12に前記杭圧入引抜機13が固定される。また 、この杭圧入引抜機13は、鋼矢板11を挟持する挟持アーム15を有すると共に、こ の挟持アーム15を上下に移動する杭圧入引抜手段16が設けられている。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIGS. 1 to 7 show a first embodiment of the present invention. In the first embodiment, an example in which the present invention is applied to a pile press-in / draw-in machine for driving a steel sheet pile, which is a sheet pile, by applying a static load thereto is shown. A pile press-in / pull-out machine 13 is fixed to a steel sheet pile wall 12 composed of a plurality of steel sheet piles 11, and the pile press-in / pull-out machine 13 as a driving device has a fixed leg portion that clamps the plurality of steel sheet piles 11 below. The fixed leg portion 14 is provided so as to be movable in the longitudinal direction of the steel sheet pile wall 12 by a moving device (not shown), and a plurality of pinching portions provided below the fixed leg portion 14 are provided. The pile press-in / pull-out machine 13 is fixed to the steel sheet pile wall 12 by the portion 14A sandwiching the steel sheet pile wall 12. The pile press-in / pull-out machine 13 has a pinching arm 15 for pinching the steel sheet pile 11, and a pile press-in / pulling-out means 16 for moving the pinching arm 15 up and down.
【００１６】 前記鋼矢板11に沿って二重管21を着脱自在に設け、この二重管21は外管22と内 管23とからなり、この内管23内により圧縮水路24を形成し、前記外管22内面と内 管23外面との間により圧縮空気路25を形成し、前記圧縮水路24の下端に圧縮水用 ノズル26を設け、前記圧縮空気路25の下端に圧縮空気用ノズル27を設けている。 図２に示すように、前記二重管21の上端側には取付け具28が一体に設けられ、こ の取付け具28には、前記鋼矢板11の上端縁に係脱自在なフック部29が回動可能に 枢着されており、また、その取付け具28の下部に、倒れ止めワイヤー30を設け、 その上部に吊り上げ用のワイヤー31を設けている。また、前記二重管21の下部は 鋼製バンド32により前記鋼矢板11に固定され、この鋼製バンド32は両側に脚部32 Ａを有しており、前記圧縮空気用ノズル27の外面に形成した凹部49に前記鋼製バ ンド32が係合している。さらに、前記二重管21の上端には、前記圧縮水路24に連 通する水ホースアダプター33と、前記圧縮空気路25に連通する空気ホースアダプ ター34とが設けられている。前記水ホースアダプター33に高圧ホース35を介して 圧縮水供給装置たる高圧ポンプ36を接続し、この高圧ポンプ36が水槽37に接続さ れ、この水槽37には水中ポンプ38により水を溜めておく。また、前記空気ホース アダプター34にホース39を介して圧縮空気供給装置たるエアーコンプレッサ40を 接続している。A double pipe 21 is detachably provided along the steel sheet pile 11, and the double pipe 21 is composed of an outer pipe 22 and an inner pipe 23, and a compressed water passage 24 is formed in the inner pipe 23. A compressed air passage 25 is formed between the inner surface of the outer tube 22 and the outer surface of the inner tube 23, a compressed water nozzle 26 is provided at a lower end of the compressed water passage 24, and a compressed air nozzle 27 is provided at a lower end of the compressed air passage 25. Is provided. As shown in FIG. 2, a fitting 28 is integrally provided on the upper end side of the double pipe 21, and the fitting 28 has a hook portion 29 which can be detachably attached to the upper edge of the steel sheet pile 11. It is rotatably pivoted, and a fall prevention wire 30 is provided at a lower portion of the fixture 28, and a lifting wire 31 is provided at an upper portion thereof. The lower portion of the double pipe 21 is fixed to the steel sheet pile 11 by a steel band 32. The steel band 32 has legs 32A on both sides, and is formed on the outer surface of the compressed air nozzle 27. The steel band 32 is engaged with the formed recess 49. Further, a water hose adapter 33 communicating with the compressed water passage 24 and an air hose adapter 34 communicating with the compressed air passage 25 are provided at an upper end of the double pipe 21. A high-pressure pump 36 serving as a compressed water supply device is connected to the water hose adapter 33 via a high-pressure hose 35, and the high-pressure pump 36 is connected to a water tank 37, in which water is stored by a submersible pump 38. . An air compressor 40 as a compressed air supply device is connected to the air hose adapter 34 via a hose 39.
【００１７】 図４及び図５に示すように、前記圧縮水用ノズル26は、前記内管23に螺合され ており、下端には噴射口41が形成されている。また、前記圧縮水用ノズル26には 下方に向って縮小するテーパ状外周面42が形成され、さらに、圧縮空気用ノズル 26の下端には平面十字型をなすスリット43が形成されている。また、前記外管22 の下端内面に雌螺子部22Ａを形成し、この雌螺子部22Ａに螺合する雄螺子部27Ａ が、前記圧縮水用ノズル27の上端外面に形成されている。さらに、前記圧縮空気 用ノズル27の上端には、テーパ状内周面44が形成され、前記外管23に圧縮空気用 ノズル27を螺合した状態で、前記テーパ状外周面42とテーパ状内周面44との間に 、前記圧縮空気路25と連通するテーパ状の案内空気路45が形成され、この案内空 気路45により圧縮空気が圧縮空気用ノズル27の中央側に案内される。さらに、前 記案内空気路45から前記圧縮空気用ノズル27の下端の噴射口46に至る通路47が、 該圧縮空気用ノズル27の内部に形成されている。そして、前記案内空気路45と前 記圧縮空気用ノズル27の噴射口46との間の長さは、前記噴射口46の直径Ｄより長 く形成されている。また、前記圧縮空気用ノズル27の下端には平面一側方向のス リット48が形成されている。また、前記圧縮水用ノズル26の噴射口41の直径ｄは 、前記圧縮空気用ノズル27の噴射口46の直径Ｄより小さく形成されている。尚、 図中49は前記鋼製バンド32が係止する凹部であり、前記圧縮空気用ノズル47の外 周に形成されている。また、前記案内空気路45の断面積を、前記圧縮空気路25の 断面積以上としている。As shown in FIGS. 4 and 5, the compressed water nozzle 26 is screwed to the inner pipe 23, and a jet port 41 is formed at a lower end. Further, the compressed water nozzle 26 is formed with a tapered outer peripheral surface 42 which is reduced in a downward direction, and a slit 43 having a plane cross shape is formed at the lower end of the compressed air nozzle 26. A female screw portion 22A is formed on the inner surface of the lower end of the outer tube 22, and a male screw portion 27A screwed to the female screw portion 22A is formed on the outer surface of the upper end of the compressed water nozzle 27. Further, a tapered inner peripheral surface 44 is formed at the upper end of the compressed air nozzle 27, and the tapered outer peripheral surface 42 and the tapered inner surface 42 are screwed with the compressed air nozzle 27 screwed to the outer tube 23. A tapered guide air passage 45 communicating with the compressed air passage 25 is formed between the compressed air passage 25 and the peripheral surface 44, and the compressed air is guided to the center of the compressed air nozzle 27 by the guide air passage 45. Further, a passage 47 extending from the guide air passage 45 to the injection port 46 at the lower end of the compressed air nozzle 27 is formed inside the compressed air nozzle 27. The length between the guide air passage 45 and the injection port 46 of the compressed air nozzle 27 is longer than the diameter D of the injection port 46. At the lower end of the compressed air nozzle 27, a slit 48 is formed in one side of the plane. The diameter d of the injection port 41 of the compressed water nozzle 26 is smaller than the diameter D of the injection port 46 of the compressed air nozzle 27. In the drawing, reference numeral 49 denotes a concave portion for locking the steel band 32, which is formed on the outer periphery of the compressed air nozzle 47. Further, the cross-sectional area of the guide air passage 45 is set to be equal to or larger than the cross-sectional area of the compressed air passage 25.
【００１８】 次に、前記装置による鋼矢板11の打込みに付き説明すると、取付け具28の吊り 下げ用ワイヤー31により二重管21を吊り上げ、取付け具28のフック部29をこれか ら打込む鋼矢板11の上端縁に掛止し、二重管21を鋼矢板11の凹部11Ａ内に配置し 、さらに、二重管21の下端をバンド32により固定する。尚、このバンド32はその 脚部32Ａを溶着によって鋼矢板11に固定し、また、図２に示すように、倒れ止め ワイヤー30は鋼矢板11の外面側に配置する。これによりフック部29を鋼矢板11か ら外しても、前記倒れ止めワイヤー30により鋼矢板11の倒れを防止できる。そし て、図１に示すように、鋼矢板壁12に固定した杭圧入引抜機13の挟持アーム15に より鋼矢板11を挟持固定し、杭圧入引抜手段16により鋼矢板11に静加重を加えて 該鋼矢板11を地盤に押し込み、所定深さの押し込みが終わったら、挟持アーム15 による挟持を解除し、該挟持アーム15を上方に移動してその上方位置にて再度挟 持固定し、再び静加重を加えて地盤に押し込み、この工程を繰り返して鋼矢板11 の打込みを行う。この打込みの工程において、高圧ポンプ36とエアーコンプレッ サ40を作動し、圧縮水用ノズル26の先端から該ノズル26により絞られた圧縮水Ｗ を噴射し、同時に圧縮空気Ａを噴射する。これより、図６に示すように、鋼矢板 11の下端に掘削孔Ｋが形成され、この掘削孔Ｋ内に溜まった礫Ｒは圧縮水Ｗと圧 縮空気Ａの力により振動すると共に、付着した土粒子（図示せず）が除去され、 この土粒子は、鋼矢板11の表面を伝わって水と供に地上に排出され、さらに、圧 縮空気Ａが泡ａとなって上昇する際に礫Ｒを上下に揺動し、この圧縮空気Ａの泡 ａによるリフトアップ効果により礫Ｒが攪拌され、従来例で示した固まり８は、 礫Ｒ相互を固定する土粒子が取り除かれて細かい礫Ｒに分解され、さらに、前記 圧縮空気Ａの泡ａによる攪拌作用によって礫Ｒ間に間隙が形成され、鋼矢板11の 打込み抵抗が大幅に削減する。このようにして鋼矢板11の打込みが終わったら、 吊り下げ用ワイヤー31により二重管21を吊り上げて外し、また、前記鋼製バンド 32は、その吊り上げ力により脚部32Ａの溶着の箇所から破断し、二重管21のみを 引き上げることができる。Next, the driving of the steel sheet pile 11 by the above-mentioned device will be described. The double pipe 21 is lifted by the wire 31 for suspending the fixture 28, and the hook portion 29 of the fixture 28 is driven from here. The double pipe 21 is hung on the upper edge of the sheet pile 11, the double pipe 21 is disposed in the recess 11A of the steel sheet pile 11, and the lower end of the double pipe 21 is fixed by a band 32. The band 32 has its legs 32A fixed to the steel sheet pile 11 by welding, and the fall prevention wire 30 is arranged on the outer surface side of the steel sheet pile 11 as shown in FIG. Thus, even if the hook portion 29 is detached from the steel sheet pile 11, the fall prevention wire 30 can prevent the steel sheet pile 11 from falling. Then, as shown in FIG. 1, the steel sheet pile 11 is clamped and fixed by the clamping arm 15 of the pile press-in / draw-out machine 13 fixed to the steel sheet pile wall 12, and a static load is applied to the steel sheet pile 11 by the pile press-in / pull-out means 16. Then, the steel sheet pile 11 is pushed into the ground, and when the pushing of the steel sheet pile 11 to the predetermined depth is completed, the holding by the holding arm 15 is released, the holding arm 15 is moved upward, and is again held and fixed at the upper position, and again. The steel sheet pile 11 is driven by applying static load and pushing the ground into the ground, and repeating this process. In this driving step, the high-pressure pump 36 and the air compressor 40 are operated, and the compressed water W throttled by the nozzle 26 and the compressed air A are simultaneously injected from the tip of the compressed water nozzle 26. As a result, as shown in FIG. 6, the excavation hole K is formed at the lower end of the steel sheet pile 11, and the gravel R accumulated in the excavation hole K vibrates by the force of the compressed water W and the compressed air A, and adheres. The soil particles (not shown) are removed, and the soil particles travel along the surface of the steel sheet pile 11 and are discharged to the ground with water, and when the compressed air A rises as bubbles a. The pebbles R are swung up and down, and the pebbles R are agitated by the lift-up effect of the foam a of the compressed air A. The compressed air A is further decomposed into bubbles, and a gap is formed between the gravels R by the stirring action of the bubbles a of the compressed air A, so that the driving resistance of the steel sheet pile 11 is greatly reduced. When the driving of the steel sheet pile 11 is completed in this way, the double pipe 21 is lifted off by the hanging wire 31, and the steel band 32 is broken from the welded portion of the leg 32A by the lifting force. However, only the double pipe 21 can be lifted.
【００１９】 このように圧縮水Ｗと圧縮空気Ａとを同時に噴射する方法において、圧縮水用 ノズル26を圧縮空気用ノズル27の上方に設けているから、圧縮水Ｗより低圧な圧 縮空気Ａを良好に噴射することができる。そして、圧縮水用ノズル26から噴射さ れた圧縮水Ｗは、その噴射口41が圧縮空気用ノズル27より細いため、圧縮空気用 ノズル27内の通路47の中央側を通って外部に噴射され、同時に圧縮空気路25から 案内空気路45を通って通路47内に圧縮空気Ａが流れ込み、この圧縮空気Ａはテー パ状の圧縮空気路45により通路47の中央側に案内され、この中央側を流れる圧縮 水Ａと一部が効率良く混合すると共に、前記圧縮水Ｗの流れにより周囲の圧縮空 気Ａが引っ張られるようにして圧縮空気用ノズル27の噴射口46から噴射され、掘 削孔Ｋの底部まで効率良く供給される。In the method of simultaneously injecting the compressed water W and the compressed air A in this manner, since the compressed water nozzle 26 is provided above the compressed air nozzle 27, the compressed air A having a lower pressure than the compressed water W is provided. Can be satisfactorily injected. The compressed water W injected from the compressed water nozzle 26 is injected to the outside through the center side of the passage 47 in the compressed air nozzle 27 because the injection port 41 is narrower than the compressed air nozzle 27. At the same time, the compressed air A flows from the compressed air passage 25 into the passage 47 through the guide air passage 45, and this compressed air A is guided to the center side of the passage 47 by the tapered compressed air passage 45, The compressed water A flowing through the nozzles is efficiently mixed with a part thereof, and the compressed water A is injected from the injection port 46 of the compressed air nozzle 27 in such a manner that the compressed air A is pulled by the flow of the compressed water W so that the drilling hole is formed. It is efficiently supplied to the bottom of K.
【００２０】 また、図７（Ａ）（Ｂ）は、本考案者が行った実験モデルを示し、円筒形の容 器51の底部に複数の石52と砂52Ａを入れ、該容器51内に二重管54の下端を挿入し た状態で、水53のみを噴射した場合と、同一条件で水53と供に空気を噴射した実 験を行い、視認により比較した。水53のみを噴射する場合では、図６（Ａ）に示 すように、石52の間の砂52Ａは水53と共に上方に移動して取り除かれるが、石52 は容器51の底部に堆積した。尚、水53の圧力を上げるほど、二重管54の下方では 石52の間に隙間がない密な堆積状態となることが認められた。一方、空気を同時 に噴射した場合では、該空気が泡となって上昇する際、砂52Ａと供に石52を上方 に浮き上がらせる力が働くことが確認でき、水53のみを噴射する場合より、空気 を同時に噴射する場合の方が、石52が攪拌されて石52間の間隙が大きくなること が認められた。また、鋼矢板11の下端に圧縮空気用ノズル27を設け、鋼矢板11の 下端から直接圧縮空気Ａを噴射するようにしたから、掘削孔Ｋ内の水が大きく泡 立ち、礫Ｒを効率よく攪拌して浮遊せしめ、該礫Ｒ間に鋼矢板11の下端を打ち込 み易くなる。FIGS. 7A and 7B show an experimental model performed by the present inventor. A plurality of stones 52 and sand 52 A are put at the bottom of a cylindrical container 51, and the container 51 is placed in the container 51. An experiment was conducted in which air was injected together with the water 53 under the same conditions as in the case where only the water 53 was injected with the lower end of the double pipe 54 inserted, and compared visually. In the case of spraying only the water 53, the sand 52A between the stones 52 moves upward together with the water 53 and is removed as shown in FIG. 6 (A), but the stones 52 are deposited on the bottom of the container 51. . It was noted that as the pressure of the water 53 was increased, a denser piled state with no gap between the stones 52 was found below the double pipe 54. On the other hand, when the air is jetted at the same time, it can be confirmed that when the air rises as a bubble, a force to lift the stone 52 upward together with the sand 52A works. However, it was found that the stones 52 were agitated and the gaps between the stones 52 became larger when air was simultaneously injected. In addition, since the compressed air nozzle 27 is provided at the lower end of the steel sheet pile 11 and the compressed air A is directly injected from the lower end of the steel sheet pile 11, the water in the excavation hole K foams greatly and the gravel R is efficiently removed. It is made to float by stirring, and it becomes easy to drive the lower end of the steel sheet pile 11 between the gravels R.
【００２１】 このように本実施例では、請求項１に対応して、矢板たる鋼矢板11を地中に打 込む打込み装置たる杭圧入引抜機13と、鋼矢板11の下端に設けられ圧縮水Ｗを噴 射する圧縮水用ノズル26と、この圧縮水用ノズル26に圧縮水Ｗを供給する圧縮水 供給装置たる高圧ポンプ36と、鋼矢板11の下端に設けられ圧縮水Ｗより低圧な圧 縮空気Ａを噴射する圧縮空気用ノズル26と、この圧縮空気用ノズル26に圧縮空気 Ａを供給する圧縮空気供給装置たるエアーコンプレッサ40とを備え、鋼矢板11に 沿って外管22と内管23とからなる二重管21を設け、内管23内に圧縮水路24を形成 すると共に、外管22と内管23との間に圧縮空気路25を形成し、圧縮水路24に高圧 ポンプ36を接続すると共に、圧縮空気路25にエアーコンプレッサ40を接続し、圧 縮水路24の下端に圧縮水用ノズル26を設けると共に、圧縮空気路25の下端に圧縮 空気用ノズル27を設け、圧縮水用ノズル26の下端を外管22内又は圧縮空気用ノズ ル26内に配置すると共に、該圧縮水用ノズル26の下端を前記圧縮空気用ノズル27 の下端より上方に設けたものであるから、圧縮水用ノズル26から圧縮水Ｗを噴射 し、この圧縮水Ｗにより鋼矢板11の下端に土粒子の取り除かれた掘削孔Ｋが形成 され、同時に、圧縮空気用ノズル27から圧縮空気Ａを噴射すると、この圧縮空気 Ａと圧縮水Ｗとにより掘削孔Ｋ内に溜った礫Ｒが振動すると共に、該圧縮空気Ａ が泡ａとなって上昇する際に礫Ｒ単体を上下に揺動し、礫Ｒ同志の間隙を作り出 すことにより、鋼矢板11の打込み抵抗が低下する。また、圧縮水用ノズル26の下 端を圧縮空気用ノズル27の下端より上方に設けたから、圧縮水Ｗの勢いにより、 圧縮水Ｗより低圧な圧縮空気Ａを良好に噴射することができ、掘削孔Ｋの底部ま で圧縮空気Ａを噴射することができ、さらに、圧縮空気用ノズル27より細い圧縮 空気用ノズル26の下端を、外管22内又は圧縮空気用ノズル27内に配置したから、 掘削において細いノズル26の損傷を防止でき、鋼矢板11の打込みを確実に行うこ とができる。このようにして、鋼矢板11の下端を比較的小さな力で打ち込むこと ができ、装置も比較的小さなエアーコンプレッサ40を使用するものであるから、 安価なものとなる。As described above, in the present embodiment, according to the first aspect, a pile press-in / pull-out machine 13 as a driving device for driving a steel sheet pile 11 as a sheet pile into the ground, and a compressed water provided at a lower end of the steel sheet pile 11. A compressed water nozzle 26 for spraying W, a high-pressure pump 36 as a compressed water supply device for supplying compressed water W to the compressed water nozzle 26, and a pressure lower than the compressed water W provided at the lower end of the steel sheet pile 11. A compressed air nozzle 26 for injecting compressed air A, an air compressor 40 as a compressed air supply device for supplying compressed air A to the compressed air nozzle 26, and an outer pipe 22 and an inner pipe along the steel sheet pile 11 are provided. 23, a compressed water passage 24 is formed in the inner tube 23, a compressed air passage 25 is formed between the outer tube 22 and the inner tube 23, and a high-pressure pump 36 is provided in the compressed water passage 24. And an air compressor 40 connected to the compressed air passage 25, and a pressure is applied to the lower end of the compressed water passage 24. A nozzle 26 for compressed water is provided, a nozzle 27 for compressed air is provided at a lower end of the compressed air passage 25, and a lower end of the nozzle 26 for compressed water is arranged in the outer pipe 22 or the nozzle 26 for compressed air. Since the lower end of the water nozzle 26 is provided above the lower end of the compressed air nozzle 27, compressed water W is injected from the compressed water nozzle 26, and soil is applied to the lower end of the steel sheet pile 11 by the compressed water W. When the compressed air A is injected from the compressed air nozzle 27 at the same time as the drilled hole K from which the particles have been removed, the compressed air A and the compressed water W vibrate the gravel R accumulated in the drilled hole K, and When the compressed air A rises as a bubble a, the single piece of gravel R is swung up and down to create a gap between the pieces of gravel R, whereby the driving resistance of the steel sheet pile 11 is reduced. Further, since the lower end of the compressed water nozzle 26 is provided above the lower end of the compressed air nozzle 27, the compressed air W can be satisfactorily injected by the force of the compressed water W, and the compressed air A having a lower pressure than the compressed water W can be injected. The compressed air A can be injected to the bottom of the hole K, and the lower end of the compressed air nozzle 26, which is thinner than the compressed air nozzle 27, is disposed in the outer pipe 22 or the compressed air nozzle 27. The thin nozzle 26 can be prevented from being damaged during excavation, and the steel sheet pile 11 can be reliably driven. In this way, the lower end of the steel sheet pile 11 can be driven with a relatively small force, and the device uses the relatively small air compressor 40, so that the cost is low.
【００２２】 また、このように本実施例では、請求項２に対応して、圧縮水用ノズル26の噴 射口41より圧縮空気用ノズル27の噴射口46の直径が大きなものであるから、圧縮 空気Ａより高圧な圧縮水Ｗが小さい噴射口41から噴射され、下方の圧縮空気用ノ ズル27の中央側を通って鋼矢板11の下方に噴射され、この中央側の圧縮水Ｗの流 れに引っ張られるようにして圧縮水Ｗの流れの回りの圧縮空気Ａが圧縮空気用ノ ズル27の外部に噴射され、比較的低圧な圧縮空気Ａを効率良く噴射することがで きる。As described above, in this embodiment, the diameter of the injection port 46 of the compressed air nozzle 27 is larger than that of the injection port 41 of the compressed water nozzle 26 according to the second aspect. The compressed water W having a higher pressure than the compressed air A is injected from the small injection port 41, passes through the central side of the compressed air nozzle 27 below and is injected below the steel sheet pile 11, and the flow of the compressed water W on the central side is reduced. As a result, the compressed air A around the flow of the compressed water W is injected outside the compressed air nozzle 27, so that the compressed air A at a relatively low pressure can be efficiently injected.
【００２３】 さらに、請求項３の考案は、圧縮空気路25と圧縮空気用ノズル27の噴射口46と の間に、圧縮空気Ａを圧縮空気用ノズル27の中央側に案内する案内空気路45を形 成したものであり、案内空気路45により、圧縮空気用ノズル27の中央側を流れる 圧縮水Ａに、圧縮空気Ａの一部が混合されて圧縮空気用ノズル27の外部に噴射さ れ、空気の混ざった圧縮水Ａを噴射することができる。Further, the present invention provides a guide air passage 45 for guiding the compressed air A to the center of the compressed air nozzle 27 between the compressed air passage 25 and the injection port 46 of the compressed air nozzle 27. A part of the compressed air A is mixed with the compressed water A flowing through the center side of the compressed air nozzle 27 by the guide air passage 45 and injected to the outside of the compressed air nozzle 27. The compressed water A mixed with air can be injected.
【００２４】 さらにまた、請求項４の考案は、圧縮水用ノズル26にテーパ状外周面42を形成 すると共に、圧縮空気用ノズル27にテーパ状内周面44を形成し、それらテーパ状 内周面42とテーパ状外周面44との間に、下方に向かって縮小するテーパ状の案内 空気路45を設けたものであり、圧縮水用ノズル26と圧縮空気用ノズル27とを組み 合わせることによりテーパ状の空気案内路45を形成することができる。Furthermore, the invention of claim 4 forms the tapered outer peripheral surface 42 on the compressed water nozzle 26 and forms the tapered inner peripheral surface 44 on the compressed air nozzle 27, and forms the tapered inner peripheral surface. A tapered guide air passage 45 that reduces downward is provided between the surface 42 and the tapered outer peripheral surface 44, and is formed by combining the compressed water nozzle 26 and the compressed air nozzle 27. The tapered air guide path 45 can be formed.
【００２５】 しかも、請求項５の考案は、案内空気路45の断面積が圧縮空気路25の断面積以 上であるから、圧縮空気Ａが空気案内路25を通って圧縮空気用ノズル27内へ流れ る際の抵抗が少なくなる。In addition, according to the invention of claim 5, since the cross-sectional area of the guide air passage 45 is equal to or larger than the cross-sectional area of the compressed air passage 25, the compressed air A passes through the air guide passage 25 and enters the compressed air nozzle 27. The resistance when flowing to is reduced.
【００２６】 また、請求項６の考案は、外管22の下端に圧縮空気用ノズル27を長さ方向から 螺合したものであり、圧縮空気用ノズル27の螺合位置を調整することにより、テ ーパ状外周面42に対するテーパ状内周面45の位置を調整して案内空気路45の断面 積を調整することができる。In the invention of claim 6, the compressed air nozzle 27 is screwed into the lower end of the outer tube 22 from the longitudinal direction. By adjusting the screwed position of the compressed air nozzle 27, By adjusting the position of the tapered inner peripheral surface 45 with respect to the tapered outer peripheral surface 42, the sectional area of the guide air passage 45 can be adjusted.
【００２７】 さらに、請求項７の考案は、案内空気路45と圧縮空気用ノズル27の噴射口46と の間の長さＬが、圧縮空気用ノズル27の噴射口46の直径Ｄより長いものであり、 案内空気路45と圧縮空気用ノズル27の噴射口46との間が比較的長いから、この間 を通る際に、圧縮水Ｗに圧縮空気Ａが混ざると共に、圧縮水Ｗの流れに引っ張ら れて圧縮空気Ａが良好に噴射される。Further, according to the present invention, the length L between the guide air passage 45 and the injection port 46 of the compressed air nozzle 27 is longer than the diameter D of the injection port 46 of the compressed air nozzle 27. Since the distance between the guide air passage 45 and the injection port 46 of the compressed air nozzle 27 is relatively long, the compressed water A is mixed with the compressed water W when passing through the space, and is drawn by the flow of the compressed water W. Thus, compressed air A is satisfactorily injected.
【００２８】 図８及び図９は本考案の第２実施例を示し、上記各実施例と同一部分に同一符 号を付し、その詳細な説明を省略して詳述すると、同図には、圧縮空気用ノズル 27は、その通路47の長さが噴射口46の直径Ｄより短いものを示し、この例では、 圧縮空気用ノズル27を小型化することができるから、そのノズル27を比較的安価 に製造することができ、また、噴射口41から噴射された圧縮水Ｗが圧縮空気用ノ ズル27の噴射口46に至るまでの間に、該圧縮水Ｗの流れにより圧縮空気Ａが下方 に向って引っ張られると共に、圧縮空気Ａと混合され、請求項１ないし６に対応 して上記第１実施例と同様な作用，効果を有する。FIGS. 8 and 9 show a second embodiment of the present invention, in which the same reference numerals are given to the same parts as those in the above embodiments, and the detailed description thereof will be omitted. The compressed air nozzle 27 has a passage 47 whose length is shorter than the diameter D of the injection port 46. In this example, the compressed air nozzle 27 can be downsized. In addition, the compressed air A can be produced by the flow of the compressed water W before the compressed water W injected from the injection port 41 reaches the injection port 46 of the nozzle 27 for compressed air. It is pulled downward and mixed with the compressed air A, and has the same functions and effects as those of the first embodiment.
【００２９】 図１０は本考案の第３実施例を示し、上記各実施例と同一部分に同一符号を付 し、その詳細な説明を省略して詳述すると、この例では、打込み装置としてバイ ブロハンマーなどの振動式杭打込引抜機13Ａを用いる例を示し、この振動打抜機 13Ａは、下部に鋼矢板11の上部を挟着するチャック61を有すると共に、振動手段 62を内蔵し、クレーン63に吊り上げられて使用される。また、前記杭打込引抜機 13Ａには操作ユニット64を介して発動発電機65が接続されている。そして、操作 ユニット64を操作し、発動発電機65を電源として振動手段62を振動させ、鋼矢板 11の打込みを行い、第１実施例と同様に鋼矢板11の下端から圧縮水Ｗと圧縮空気 Ａとを噴射する。FIG. 10 shows a third embodiment of the present invention, in which the same reference numerals are given to the same parts as those in the above-described embodiments, and the detailed description thereof is omitted. An example of using a vibratory pile driving and pulling machine 13A such as a blow hammer is shown. This vibrating punching machine 13A has a chuck 61 for holding the upper part of the steel sheet pile 11 at the lower part, and has a built-in vibrating means 62, It is used by being lifted to 63. A power generator 65 is connected to the pile driving and pulling machine 13A via an operation unit 64. Then, the operating unit 64 is operated, the vibration generator 62 is vibrated using the power generator 65 as a power source, and the steel sheet pile 11 is driven. As in the first embodiment, compressed water W and compressed air are blown from the lower end of the steel sheet pile 11. A is injected.
【００３０】 尚、本考案は上記実施例に限定されるものではなく本考案の要旨の範囲内にお いて種々の変形実施が可能である。例えば、矢板としては、実施例で示した鋼矢 板以外の矢板の打込み装置に、本考案を適用することができる。また、杭圧入引 抜機及び杭打込引抜機は各種タイプのものを用いることができる。The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, as a sheet pile, the present invention can be applied to a sheet pile driving device other than the steel sheet pile shown in the embodiment. Various types of pile press-in and pull-out machines can be used.
【００３１】[0031]
請求項１の打設装置は、矢板を地中に打込む打込み装置と、前記矢板の下端に 設けられ圧縮水を噴射する圧縮水用ノズルと、この圧縮水用ノズルに圧縮水を供 給する圧縮水供給装置と、前記矢板の下端に設けられ前記圧縮水より低圧な圧縮 空気を噴射する圧縮空気用ノズルと、この圧縮空気用ノズルに圧縮空気を供給す る圧縮空気供給装置とを備え、前記矢板に沿って外管と内管とからなる二重管を 設け、前記内管内に圧縮水路を形成すると共に、前記外管と前記内管との間に圧 縮空気路を形成し、前記圧縮水路に前記圧縮水供給装置を接続すると共に、前記 圧縮空気路に前記圧縮空気供給装置を接続し、前記圧縮水路の下端に前記圧縮水 用ノズルを設けると共に、前記圧縮空気路の下端に前記圧縮空気用ノズルを設け 、前記圧縮水用ノズルの下端を前記外管内又は前記圧縮空気用ノズル内に配置す ると共に、該圧縮水用ノズルの下端を前記圧縮空気用ノズルの下端より上方に設 けたものであり、比較的安価にして、打込み効率を向上することができ、現場に 合った使い易いノズルを備えた矢板の打設装置を提供することができる。 According to a first aspect of the present invention, there is provided a driving device for driving a sheet pile into the ground, a nozzle for compressed water provided at a lower end of the sheet pile for spraying compressed water, and supplying compressed water to the nozzle for compressed water. A compressed water supply device, a compressed air nozzle provided at a lower end of the sheet pile for injecting compressed air having a lower pressure than the compressed water, and a compressed air supply device for supplying compressed air to the compressed air nozzle. A double pipe consisting of an outer pipe and an inner pipe is provided along the sheet pile, a compressed water path is formed in the inner pipe, and a compressed air path is formed between the outer pipe and the inner pipe. The compressed water supply device is connected to the compressed water passage, the compressed air supply device is connected to the compressed air passage, the compressed water nozzle is provided at a lower end of the compressed water passage, and the compressed water passage is provided at a lower end of the compressed air passage. Providing a nozzle for compressed air; The lower end of the nozzle is disposed in the outer tube or the compressed air nozzle, and the lower end of the compressed water nozzle is provided above the lower end of the compressed air nozzle. It is possible to improve the driving efficiency and to provide a sheet pile driving device having an easy-to-use nozzle suitable for the site.
【００３２】 また、請求項２の考案は、前記圧縮水用ノズルの噴射口より前記圧縮空気用ノ ズルの噴射口が大きなものであり、比較的安価にして、打込み効率を向上するこ とができ、現場に合った使い易いノズルを備えた矢板の打設装置を提供すること ができる。[0032] In the invention of claim 2, the injection port of the compressed air nozzle is larger than the injection port of the compressed water nozzle, so that it is relatively inexpensive and the driving efficiency can be improved. Thus, it is possible to provide a sheet pile driving device having an easy-to-use nozzle suitable for the site.
【００３３】 さらに、請求項３の考案は、前記圧縮空気路と前記圧縮空気用ノズルの噴射口 との間に、前記圧縮空気を前記圧縮空気用ノズルの中央側に案内する案内空気路 を形成したものであり、比較的安価にして、打込み効率を向上することができ、 現場に合った使い易いノズルを備えた矢板の打設装置を提供することができる。Further, according to the invention of claim 3, a guide air passage is formed between the compressed air passage and the injection port of the compressed air nozzle for guiding the compressed air to the center side of the compressed air nozzle. This makes it possible to improve the driving efficiency at a relatively low cost, and to provide a sheet pile driving device having an easy-to-use nozzle suitable for the site.
【００３４】 さらにまた、請求項４の考案は、前記圧縮水用ノズルにテーパ状外周面を形成 すると共に、前記圧縮空気用ノズルにテーパ状内周面を形成し、それらテーパ状 内周面とテーパ状外周面との間に、下方に向かって縮小するテーパ状の前記案内 空気路を設けたものであり、比較的安価にして、打込み効率を向上することがで き、現場に合った使い易いノズルを備えた矢板の打設装置を提供することができ る。Further, the invention of claim 4 is that, in the compressed water nozzle, a tapered outer peripheral surface is formed, and the compressed air nozzle is formed with a tapered inner peripheral surface. The tapered guide air passage is provided between the tapered outer peripheral surface and the tapered guide air passage which is reduced in a downward direction. A sheet pile driving device having an easy-to-use nozzle can be provided.
【００３５】 しかも、請求項５の考案は、前記案内空気路の断面積が前記圧縮空気路の断面 積以上であり、比較的安価にして、打込み効率を向上することができ、現場に合 った使い易いノズルを備えた矢板の打設装置を提供することができる。In addition, according to the invention of claim 5, the cross-sectional area of the guide air passage is larger than the cross-sectional area of the compressed air passage, so that it can be made relatively inexpensive, and the driving efficiency can be improved. Further, it is possible to provide a sheet pile driving device having an easy-to-use nozzle.
【００３６】 また、請求項６の考案は、前記外管の下端に前記圧縮空気用ノズルを長さ方向 から螺合したものであり、比較的安価にして、打込み効率を向上することができ 、現場に合った使い易いノズルを備えた矢板の打設装置を提供することができる 。In the invention of claim 6, the compressed air nozzle is screwed to the lower end of the outer tube from the longitudinal direction, so that it is relatively inexpensive and the driving efficiency can be improved. A sheet pile driving device provided with an easy-to-use nozzle suitable for the site can be provided.
【００３７】 さらに、請求項７の考案は、前記案内空気路と前記圧縮空気用ノズルの噴射口 との間が、該圧縮空気用ノズルの噴射口の直径より長いものであり、比較的安価 にして、打込み効率を向上することができ、現場に合った使い易いノズルを備え た矢板の打設装置を提供することができる。[0037] Furthermore, the invention of claim 7 is that the distance between the guide air passage and the injection port of the compressed air nozzle is longer than the diameter of the injection port of the compressed air nozzle. In addition, it is possible to improve the driving efficiency and to provide a sheet pile driving device having an easy-to-use nozzle suitable for the site.
【図１】本考案の第１実施例を示す全体側面図である。FIG. 1 is an overall side view showing a first embodiment of the present invention.
【図２】本考案の第１実施例を示す二重管を取付けた状
態の鋼矢板の断面図である。FIG. 2 is a cross-sectional view of the steel sheet pile with the double pipe attached showing the first embodiment of the present invention.
【図３】本考案の第１実施例を示す鋼矢板下端の一部切
欠斜視図である。FIG. 3 is a partially cutaway perspective view of a lower end of the steel sheet pile showing the first embodiment of the present invention.
【図４】本考案の第１実施例を示す両ノズルの断面図で
ある。FIG. 4 is a sectional view of both nozzles showing the first embodiment of the present invention.
【図５】本考案の第１実施例を示す両ノズルの分解斜視
図である。FIG. 5 is an exploded perspective view of both nozzles showing the first embodiment of the present invention.
【図６】本考案の第１実施例を示す打込み状態における
鋼矢板下端の断面説明図である。FIG. 6 is an explanatory cross-sectional view of the lower end of the steel sheet pile in the driven state, showing the first embodiment of the present invention.
【図７】本考案の第１実施例を示す実験装置の断面図で
あり、図７（Ａ）は水噴射における断面図であり、図７
（Ｂ）水及び空気噴射における断面図である。FIG. 7 is a cross-sectional view of an experimental apparatus showing a first embodiment of the present invention, and FIG. 7 (A) is a cross-sectional view in water injection, and FIG.
(B) It is sectional drawing in water and air injection.
【図８】本考案の第２実施例を示す両ノズルの断面図で
ある。FIG. 8 is a sectional view of both nozzles showing a second embodiment of the present invention.
【図９】本考案の第２実施例を示す両ノズルの底面図で
ある。FIG. 9 is a bottom view of both nozzles showing a second embodiment of the present invention.
【図１０】本考案の第３実施例を示す全体斜視図であ
る。FIG. 10 is an overall perspective view showing a third embodiment of the present invention.
【図１１】従来例を示す断面説明図であり、図１１
（Ａ）は圧縮水を低圧で噴射した状態で一部を拡大した
断面説明図、図１１（Ｂ）は圧縮水を高圧で噴射した状
態の断面説明図である。11 is an explanatory sectional view showing a conventional example, and FIG.
FIG. 11A is a cross-sectional explanatory view in which a part is enlarged in a state where compressed water is injected at a low pressure, and FIG. 11B is a cross-sectional explanatory view in a state where compressed water is injected at a high pressure.
11 鋼矢板（矢板） 13 杭圧入引抜機（打込み装置） 13Ａ 杭打込圧入引抜機（打込み装置） 21 二重管 22 外管 23 内管 24 圧縮水路 25
圧縮空気路 26 圧縮水用ノズル 27 圧縮空気用ノズル 41 噴射口 42 テーパ状外周面 44 テーパ状内周面
45 案内空気路 46 噴射口 47 通路 36 高圧ポンプ（圧縮水供給装置） 40 エアーコンプレッサ（圧縮空気供給装置） Ｗ 圧縮水 Ａ 圧縮空気11 Steel sheet pile (sheet pile) 13 Pile press-in / pull-out machine (driving device) 13A Pile driving press-in / pull-out machine (punching device) 21 Double pipe 22 Outer pipe 23 Inner pipe 24 Compression channel 25
Compressed air passage 26 Nozzle for compressed water 27 Nozzle for compressed air 41 Injection port 42 Tapered outer peripheral surface 44 Tapered inner peripheral surface
45 Guide air passage 46 Injector 47 Passage 36 High-pressure pump (compressed water supply device) 40 Air compressor (compressed air supply device) W Compressed water A Compressed air
Claims (7)
矢板の下端に設けられ圧縮水を噴射する圧縮水用ノズル
と、この圧縮水用ノズルに圧縮水を供給する圧縮水供給
装置と、前記矢板の下端に設けられ前記圧縮水より低圧
な圧縮空気を噴射する圧縮空気用ノズルと、この圧縮空
気用ノズルに圧縮空気を供給する圧縮空気供給装置とを
備え、前記矢板に沿って外管と内管とからなる二重管を
設け、前記内管内に圧縮水路を形成すると共に、前記外
管と前記内管との間に圧縮空気路を形成し、前記圧縮水
路に前記圧縮水供給装置を接続すると共に、前記圧縮空
気路に前記圧縮空気供給装置を接続し、前記圧縮水路の
下端に前記圧縮水用ノズルを設けると共に、前記圧縮空
気路の下端に前記圧縮空気用ノズルを設け、前記圧縮水
用ノズルの下端を前記外管内又は前記圧縮空気用ノズル
内に配置すると共に、該圧縮水用ノズルの下端を前記圧
縮空気用ノズルの下端より上方に設けたことを特徴とす
る矢板の打設装置。1. A driving device for driving a sheet pile into the ground, a compressed water nozzle provided at a lower end of the sheet pile for jetting compressed water, a compressed water supply apparatus for supplying compressed water to the compressed water nozzle. A compressed air nozzle that is provided at a lower end of the sheet pile and injects compressed air having a lower pressure than the compressed water; and a compressed air supply device that supplies compressed air to the compressed air nozzle. A double pipe consisting of a pipe and an inner pipe is provided, a compressed water path is formed in the inner pipe, a compressed air path is formed between the outer pipe and the inner pipe, and the compressed water supply is supplied to the compressed water path. Attaching the device, connecting the compressed air supply device to the compressed air passage, providing the compressed water nozzle at the lower end of the compressed water passage, and providing the compressed air nozzle at the lower end of the compressed air passage, Lower end of the compressed water nozzle A sheet pile driving device, which is disposed in the outer pipe or the compressed air nozzle, and a lower end of the compressed water nozzle is provided above a lower end of the compressed air nozzle.
縮空気用ノズルの噴射口が大きなことを特徴とする請求
項１記載の矢板の打設装置。2. The sheet pile driving device according to claim 1, wherein an injection port of the compressed air nozzle is larger than an injection port of the compressed water nozzle.
の噴射口との間に、前記圧縮空気を前記圧縮空気用ノズ
ルの中央側に案内する案内空気路を形成したことを特徴
とする請求項２記載の矢板の打設装置。3. A guide air passage is formed between the compressed air passage and an injection port of the compressed air nozzle, for guiding the compressed air to a center side of the compressed air nozzle. Item 5. A sheet pile driving device according to Item 2.
形成すると共に、前記圧縮空気用ノズルにテーパ状内周
面を形成し、それらテーパ状内周面とテーパ状外周面と
の間に、下方に向かって縮小するテーパ状の前記案内空
気路を設けたことを特徴とする請求項３記載の矢板の打
設装置。4. A tapered outer peripheral surface is formed on the compressed water nozzle, and a tapered inner peripheral surface is formed on the compressed air nozzle, between the tapered inner peripheral surface and the tapered outer peripheral surface. 4. The sheet pile driving device according to claim 3, wherein the guide air passage having a tapered shape that contracts downward is provided.
路の断面積以上であることを特徴とする請求項４記載の
矢板の打設装置。5. The sheet pile driving device according to claim 4, wherein a cross-sectional area of the guide air passage is larger than a cross-sectional area of the compressed air passage.
を長さ方向から螺合したことを特徴とする請求項４又は
５記載の矢板の打設装置。6. The sheet pile driving device according to claim 4, wherein the compressed air nozzle is screwed into a lower end of the outer tube from a longitudinal direction.
の噴射口との間が、該圧縮空気用ノズルの噴射口の直径
より長いことを特徴とする請求項３〜５のいずれか１項
に記載の矢板の打設装置。7. The compressed air nozzle according to claim 3, wherein a distance between the guide air passage and the injection port of the compressed air nozzle is longer than a diameter of the injection port of the compressed air nozzle. A sheet pile driving device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1997008385U JP3047330U (en) | 1997-09-19 | 1997-09-19 | Sheet pile driving equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1997008385U JP3047330U (en) | 1997-09-19 | 1997-09-19 | Sheet pile driving equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3047330U true JP3047330U (en) | 1998-04-10 |
Family
ID=43181642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1997008385U Expired - Lifetime JP3047330U (en) | 1997-09-19 | 1997-09-19 | Sheet pile driving equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3047330U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002081066A (en) * | 2000-09-07 | 2002-03-22 | Shinko Kk | Pull-out method and device for foundation pile |
| JP3534234B2 (en) | 1999-04-07 | 2004-06-07 | 不動建設株式会社 | Underground penetration assist device for casing and underground penetration assist method |
| KR20240061019A (en) * | 2022-10-31 | 2024-05-08 | 주식회사 유앤씨 | pile drawing casing having confidentiality |
-
1997
- 1997-09-19 JP JP1997008385U patent/JP3047330U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3534234B2 (en) | 1999-04-07 | 2004-06-07 | 不動建設株式会社 | Underground penetration assist device for casing and underground penetration assist method |
| JP2002081066A (en) * | 2000-09-07 | 2002-03-22 | Shinko Kk | Pull-out method and device for foundation pile |
| JP3460147B2 (en) | 2000-09-07 | 2003-10-27 | シンコー株式会社 | Method and apparatus for pulling out foundation pile |
| KR20240061019A (en) * | 2022-10-31 | 2024-05-08 | 주식회사 유앤씨 | pile drawing casing having confidentiality |
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