JPH0988062A - Excavation method of foundation ground and device thereof - Google Patents
Excavation method of foundation ground and device thereofInfo
- Publication number
- JPH0988062A JPH0988062A JP26916795A JP26916795A JPH0988062A JP H0988062 A JPH0988062 A JP H0988062A JP 26916795 A JP26916795 A JP 26916795A JP 26916795 A JP26916795 A JP 26916795A JP H0988062 A JPH0988062 A JP H0988062A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- ground
- auger
- peripheral wall
- pile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Piles And Underground Anchors (AREA)
- Earth Drilling (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は建設等基礎地盤をきわ
めて容易確実に掘孔すると同時に、特に該掘孔内の孔周
壁をより強固に圧締形成し、掘孔掘削時に生じる孔周壁
の崩壊を未然に防止すると共にオーガー抜扞時に吸引力
により必生する孔内の崩壊をも阻止行わしめんとする基
礎地盤の掘孔方法とその装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention very easily and surely digs a foundation ground for construction, etc., and at the same time, the hole circumferential wall in the hole is more firmly clamped, so that the hole circumferential wall collapses during excavation of the hole. The present invention relates to a method for drilling a foundation ground and an apparatus thereof for preventing the collapse of the inside of the hole which is inevitable due to the suction force when removing the auger.
【０００２】[0002]
【従来の技術】従来、建築等基礎地盤造成工法で地中に
所定径寸の杭孔の掘削と同時に該掘削孔壁をより強固に
圧締し孔壁の崩壊を防止すると共に地上への排土量を少
なくしようとする地盤掘孔工法とその装置が既に開発さ
れている。2. Description of the Related Art Conventionally, in the foundation ground construction method for buildings and the like, at the same time as excavating a pile hole of a predetermined diameter in the ground, the hole wall is more firmly pressed to prevent the hole wall from collapsing and to be discharged to the ground. A ground drilling method and its equipment have already been developed to reduce the amount of soil.
【０００３】[0003]
【発明が解決しょうとする課題】その一例として発明者
は先に地中掘進と同時にスクリュー翼片の周縁に形成せ
る圧土縁と円錐形オーガーヘッドによって孔周壁を圧密
しながら強固な孔壁を造成すると共に地上への揚土量を
もすこぶる寡少な無排土の地盤掘孔装置を開発し現在も
使用されているが、かかる工法は掘孔後において上記掘
削せる孔周壁とオーガー間に多数個の密着部分及び該密
着部分間に真空部分が多数にわたって形成し空気の逃げ
場がなくこれが原因にて抜扞時に急激な吸引力が発生し
折角、強固に圧締せる孔壁が崩壊する等の憂いが生じて
いた。発明者はかかる欠点を解決するものとして、先に
図１の如く数枚のスクリュー翼片Ｓを上下に有してなる
オーガーヘッドＡの該スクリュー翼片Ｓの前後面または
前後左右面に平坦切欠面Ｂを凹設形成してなる基礎地盤
の掘孔装置（特願平５−３４８００４）を発明し、掘削
土壌を掘孔周部に拡開押圧し無排土で強固な孔壁を造成
すると共にオーガ抜扞時に発生する空気の逃げ場として
の空隙を積極的に形成して逆吸引力を発生させ孔内が崩
壊する等の懸念の全くない掘孔装置を求めることが出来
得たのであるが、該発明によるスクリュー翼片Ｓに切欠
面Ｂを形成設けることは技術的、強度的において問題が
あつたので該欠点を根本的に解消しより強固な支持地盤
を造成しようとする地盤掘孔装置を提供することにあ
る。As an example of the problem, the inventor first made a strong hole wall while consolidating the hole peripheral wall by a concavity edge and a conical auger head which are formed on the periphery of the screw blade piece simultaneously with the underground excavation. A ground drilling device with a small amount of non-removing soil that has been constructed and can lift up to the ground has been developed and is still in use.However, such a method is often used between the surrounding wall and the auger that can be drilled after drilling. A lot of vacuum parts are formed between the individual contact parts and between the contact parts, and there is no escape area for the air, which causes a sudden suction force at the time of pulling and pulling, and the hole wall that can be firmly clamped collapses. I was worried. In order to solve such a drawback, the inventor has previously made flat notches on front and rear surfaces or front and rear and right and left surfaces of the screw blade S of an auger head A having a plurality of screw blades S vertically as shown in FIG. Inventing a base ground drilling device (Japanese Patent Application No. 5-348004) in which the surface B is formed in a concave shape, and expands and presses the excavated soil to the peripheral portion of the drilling hole to create a strong hole wall without soil discharge. At the same time, it was possible to seek a drilling device that does not have any concerns such as collapse of the inside of the hole by positively forming a void as an escape area for air generated when removing the auger and generating a reverse suction force. The formation of the notch surface B on the screw blade piece S according to the present invention has a technical and strength problem. Therefore, a ground drilling device for fundamentally eliminating the drawback and forming a stronger support ground. To provide.
【０００４】[0004]
【課題を解決するための手段】即ち、この発明に係る掘
孔装置は先掘刃２を先端部に有したオーガヘッド１のの
同軸上部にオーガー軸周面の前後面を縦軸方向に一定の
深さに凹欠して切欠面４を形成せるオーガーケーシング
３を一体的に連設せしめた構成をその特徴とするもので
地中に崩壊のない強固な地盤を造成しようとするを主な
目的とする。That is, in the drilling device according to the present invention, the front and rear surfaces of the auger shaft peripheral surface are fixed in the longitudinal direction on the coaxial upper part of the auger head 1 having the tip of the auger blade 2. The feature is that the auger casings 3 that are notched at the depth of 1 to form the notch surface 4 are integrally connected in series. The main purpose is to create a strong ground without collapse in the ground. To aim.
【０００５】[0005]
【作用】次に上記、装置による基礎地盤の掘孔施工例を
説明すると、先ず先端にスクリューを有したオーガーヘ
ッド１を一体的に連接してなるオーガーケーシング３を
杭打機にセットして所定地上に定置し、しかる後に動力
を回転駆動するにおいてオーガーヘッド１先端の先掘刃
２が回転し先端地盤を攪乱しながら掘進する。また上
記、掘進と同時にスクリューの外周面とオーガーヘッド
１の円錐面の作用により上記、掘削せる土壌を上方に押
し上げながらこれを孔周壁面に拡開圧締する。かかる回
転掘進と同時にオーガーヘッド１と追従するオーガーケ
ーシング３の周面に凹設せる切欠面４の角縁部分４ａの
角縁により孔周壁ｂを切開すると同時に該切欠面４一方
の角縁部分４ｂの作用により上記切開せる孔周壁ｂ面を
恰もコテ面の如く孔周に強力に圧締し強固な圧密孔壁を
形成行わしめる。特にこの発明においては上記、交互に
繰り返す孔壁の削落及び圧締作用と同時にオーガーケー
シング３面に平坦な切欠面４が少なくとも該前後、左右
または数個が設けられているがためにオーガーケーシン
グ３の下進に伴って土質等の関係によってオーガ面と孔
壁間に空隙ｃが点在形成し、かかる空隙ｃ形成によって
上記オーガーと孔壁間に渋滞せる空気を始めとして泥土
等を自然的に導入し抜扞時における孔内の吸引力を抑制
するは勿論、爾後作業として上記掘削掘孔内にモルタル
ｄ等の凝結材を充填行わしめることによって点在する空
隙部ｃ内にモルタルが該掘孔内に打設せる杭柱Ｐの周面
に一体的に固結し、これが恰たかも瘤鍔ｄ｀を呈し強固
な基礎杭を容易確実に施工行わしめることが出来得るの
である。Next, a description will be given of an example of constructing a foundation hole by the above-mentioned apparatus. First, an auger casing 3 formed by integrally connecting an auger head 1 having a screw at its tip is set on a pile driver and predetermined. When it is placed on the ground and then the power is rotationally driven, the tip cutting blade 2 at the tip of the auger head 1 rotates and the tip ground is disturbed to advance. Simultaneously with the excavation, the outer peripheral surface of the screw and the conical surface of the auger head 1 work to push the soil to be excavated upward while expanding and clamping it on the peripheral wall surface of the hole. Simultaneously with such rotary excavation, the hole peripheral wall b is cut by the corner edge of the cut edge surface 4a which is recessed in the peripheral surface of the auger casing 3 that follows the auger head 1, and at the same time, the one corner edge portion 4b of the cut surface 4 is cut. By this action, the surface of the hole peripheral wall b that can be incised is strongly pressed against the hole periphery like a trowel surface to form a strong consolidated hole wall. In particular, in the present invention, the auger casing is provided with at least the front, rear, left and right, or several flat notch surfaces 4 on the surface of the auger casing 3 at the same time as the above-described alternate cutting and pressing action of the hole wall. As a result of the downward movement of No. 3, voids c are scattered between the auger surface and the hole wall due to the relationship of soil properties, etc. Due to the formation of such voids c In addition to suppressing suction force in the hole during introduction and removal, the mortar in the interspersed cavities c can be prevented by filling the excavation hole with a condensing material such as mortar d as a subsequent work. It is possible to easily and surely construct a strong foundation pile that is integrally fixed to the peripheral surface of the pile pillar P that can be placed in the drill hole, and that has the appearance of a bump d '.
【０００６】また上記、形状のオーガーケーシング７に
おいて軸周面に切欠面４，４を形成せるオーガーケーシ
ング３と、該切欠面４を形成していないオーガーケーシ
ング７を同軸上に一定間隔毎に交互に連結せしめること
により、切欠面４を形成していないオーガーケーシング
７面にて周辺の孔壁の削落を防止し、且つ摩擦抵抗の少
ない状体にて地中を確実に掘進し、同時に次隣の切欠面
４の回転掘削によってより上記切開及び圧締作用を効果
的に行わしめることが出来得るのである。Further, in the auger casing 7 having the above-mentioned shape, the auger casing 3 having the cutout surfaces 4 and 4 formed on the shaft circumferential surface and the auger casing 7 having no cutout surface 4 are coaxially alternated at regular intervals. By connecting with the auger casing 7 surface not forming the notch surface 4, it is possible to prevent the peripheral hole wall from being scraped off, and to reliably excavate the ground in a state with less frictional resistance. By rotating and excavating the adjacent notched surface 4, it is possible to effectively carry out the above-mentioned incision and clamping action.
【０００７】[0007]
【実施例】以下、この発明の実施例を説明すると、１は
周部に上下略同一径寸巾のスクリュー翼片２を有し、且
つ全体形状を円錐形状に形成してなるオーガーヘッド１
で該同軸上に適当な連結座５を介して円筒形状のオーガ
ーケーシング３を連結されている。また上記オーガー周
面には縦軸方向に対して該周面の前後または左右面には
一定の深さに凹欠してなる平坦な切欠面４、４を形成設
けてなるものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. 1 is an auger head 1 having a peripheral portion with screw blades 2 having substantially the same diameter and width and having an overall conical shape.
The cylindrical auger casing 3 is coaxially connected via a suitable connecting seat 5. Further, the auger peripheral surface is provided with flat notch surfaces 4 and 4 which are recessed at a constant depth on the front and rear or left and right surfaces of the peripheral surface with respect to the vertical axis direction.
【０００８】また、他の実施例として上記切欠面４をオ
ーガー軸の全長にわたって前後に形成することなく、そ
の掘孔目的とする地盤、地質等に応じて上記切欠面４、
４をオーガー軸面の数箇所部分に一定の間隔毎に交互に
形成設ける場合もある。さの一例として図５に示めす他
の実施例の如く、上記オーガーケーシング７上下全長に
スクリュー凸条８を付設してなるスクリューケーシング
７において、該一部の前後面に上記と同様に切欠面４、
４を付設した部分と、該切欠面４、４を付設しない部分
とを一定の間隔毎に同軸上に一体的に連結行わしめるこ
とも一考である。図面においては省略しているがオーガ
ーヘッド１ならびにオーガーケーシング３の軸内にはモ
ルタル送注管を縦貫配設し、その先端下方はヘッド先端
に開孔せるモルタル噴射孔６に連通連結されている。As another embodiment, the notch surface 4 is not formed in the front and rear over the entire length of the auger shaft, but the notch surface 4 is formed in accordance with the target ground, geology, etc.
In some cases, 4 may be alternately formed at certain positions on the auger shaft surface at regular intervals. As another example shown in FIG. 5 as an example, in the screw casing 7 in which the screw ridges 8 are attached to the entire length of the auger casing 7 in the vertical direction, the notch surface is formed on the front and rear faces of the part in the same manner as described above. 4,
It is also a consideration to integrally connect the portion provided with 4 and the portion not provided with the cutout surfaces 4 and 4 coaxially at regular intervals. Although not shown in the drawing, a mortar injection pipe is longitudinally provided in the shafts of the auger head 1 and auger casing 3, and the lower end of the mortar injection pipe is connected to a mortar injection hole 6 which is opened at the tip of the head. .
【０００９】[0009]
【発明の効果】この発明に係る基礎地盤の掘孔装置は上
記の如くオーガーケーシング３の周面の前後面に一定の
深さの切欠面４を形成してなるもので該装置をオーガー
ヘッド１の上部に一体的に連設してなるものであるから
回転掘進に伴って掘削と同時に上記切欠面４の両側角縁
部分４ａ、ｂの作用により孔周壁ｂを切開と圧締する作
用を連続的に繰り返し行わしめることによって如何なる
地盤層であっても地中に排土も殆ど無く無振動にて強固
な圧密孔壁を有した杭孔を容易確実に施工出来得る効果
がある。しかも、この発明においてはオーガーケーシン
グ３の周面に単に切欠面４を凹欠するという極めて簡単
な構造を有するものであって、前掲せるスクリュー部分
を凹欠するものとは異なり、装置全体としては強固で破
損する等の懸念も毛頭なく安価に提供出来得る等の効果
も併せ有している。特にこの発明はオーガーケーシング
３の周面全長に切欠面４を設けたことによって、掘進時
におけるケーシング全体面における土圧等による摩擦抵
抗を寡少とし、使用エネルギーを大巾に節減出来得るは
勿論、オーガーケーシング３の下進に伴ってオーガ面と
孔壁間に点在状に空隙ｃ部分が形成し、かかる空隙ｃの
形成によって上記オーガーと孔壁間に渋滞せる空気を始
めとして泥土等が自然的に該空隙ｃ内に導入し、これが
抜扞時に必成する孔内の吸引力を自然的に抑制し以てオ
ーガー抜扞時における孔内の吸引による崩壊を未然に阻
止すると共に上記空隙ｃ内にモルタルｄを充填行わしめ
ることによって該モルタルｄが杭柱Ｐの周面に恰も瘤鍔
ｄ｀の如く一体的に付設し従来の鍔杭と全く同様の強固
な基礎地盤を地中に施工することが出来得るのである。As described above, the boring device for the foundation ground according to the present invention comprises the auger casing 1 and the auger head 1 which is provided with the notched surfaces 4 having a constant depth on the front and rear surfaces of the peripheral surface thereof. Since it is integrally connected to the upper part of the hole, the action of both side edge portions 4a and 4b of the cutout surface 4 at the same time as the excavation is accompanied by the rotary excavation, the action of cutting and clamping the hole peripheral wall b is continued. By repeatedly performing such repeated operations, it is possible to easily and surely construct a pile hole having a strong consolidation hole wall without vibration in the ground with almost no soil discharge, regardless of the soil layer. Moreover, the present invention has a very simple structure in which the notch surface 4 is simply recessed in the peripheral surface of the auger casing 3, and unlike the above-described recessed screw portion, the entire device is It also has the effect that it can be provided at low cost without any concern about being strong and damaged. Particularly, according to the present invention, by providing the notch surface 4 on the entire length of the peripheral surface of the auger casing 3, the frictional resistance due to earth pressure on the entire surface of the casing during excavation can be minimized, and the energy used can be greatly reduced. With the downward movement of the auger casing 3, voids c are formed in a scattered manner between the auger surface and the hole wall, and due to the formation of the voids c, the mud and the like are naturally caused by the air trapped between the auger and the hole wall. Purposely introduced into the space c, which naturally suppresses the suction force in the hole which is required at the time of pulling out to prevent the collapse due to the suction in the hole at the time of pulling out the auger. By filling the inside with mortar d, the mortar d is integrally attached to the peripheral surface of the pile column P like a bump d ', and a solid foundation ground exactly the same as the conventional tsuba pile is constructed in the ground. To do Than is obtained.
【００１０】また請求項３項記載の如く、上記切欠面
４，４をオーガーケーシング３の全長にわたって形成設
けることなく、同軸上に適宜の間隔を隔てて該切欠面４
を切欠行わしめることによって切欠面４，４による孔周
壁ｂの切開、圧締する作用をオーガーの掘進に伴って間
欠的に行わしめ、上記の切開、圧締効果をより効果的と
すは勿論、更に上記ケーシング３面にスクリュー凸条８
を付設すると共に該オーガー面に上記の如く適宜の間隔
毎に切欠面４を切欠設けたスクリューケーシング７を用
いることによって如何なる硬、軟質等の施工地盤である
も摩擦抵抗をより良好確実に遮断し、円滑良好な回転掘
削が求め得られる等の効果を有している。Further, as described in claim 3, without forming the notch surfaces 4 and 4 over the entire length of the auger casing 3, the notch surfaces 4 are coaxially provided at appropriate intervals.
By notching, the action of cutting and clamping the hole peripheral wall b by the notched surfaces 4 and 4 is performed intermittently with the excavation of the auger, and of course the above cutting and clamping effects are made more effective. , And the screw ridges 8 on the casing 3 surface.
By using the screw casing 7 provided with the auger surface and having the notched surfaces 4 cut out at appropriate intervals as described above, the frictional resistance can be more reliably cut off regardless of the construction ground of any hardness, softness, etc. It has the effect that smooth and good rotary excavation can be obtained.
【図１】 従来の基礎地盤掘孔装置の正面図、FIG. 1 is a front view of a conventional foundation ground drilling device,
【図２】 この発明に係る基礎地盤の掘孔装置の正面
図、FIG. 2 is a front view of a drilling device for foundation ground according to the present invention,
【図３】 同上、横断切断面図、[Fig. 3] Same as above, a cross-sectional cutaway view,
【図４】 同上、この発明装置による地盤の掘削状体
図、FIG. 4 is the same as the above, an excavation diagram of ground by the device of the present invention,
【図５】 他の実施例による掘孔装置の正面図である。FIG. 5 is a front view of a drilling device according to another embodiment.
１ オーガーヘッド ２ 先掘刃 ３ オーガーケーシング ４ 切欠面 ５ 連結座 ６ モルタル噴射孔 ７ スクリューケーシング ８ スクリュー凸条 ａ 杭孔 ｂ 孔周壁 ｃ 空隙 ｄ モルタル DESCRIPTION OF SYMBOLS 1 Auger head 2 Cutting edge 3 Auger casing 4 Notch surface 5 Connection seat 6 Mortar injection hole 7 Screw casing 8 Screw ridge a Pile hole b Hole peripheral wall c Void d Mortar
Claims (3)
ド１の同軸上部に縦軸方向に前後または左右面を一定の
深さに凹欠して切欠面４を形成せるオーガーケーシング
３を一体的に連設し形成してなる地盤掘孔装置を用いて
地盤を掘削しようとするもので、上記装置を杭打機に吊
設して所定地盤に仮打ちし、しかる後に該装置を動力及
び荷重を負荷させながら回転駆動させ地盤を掘孔するに
おいて、上記先掘刃２にて地盤を掘進すると同時に該掘
孔装置のオーガーケーシング３面に形成せる前後の切欠
面４の回転作用によって先掘刃２にて掘孔せる杭孔ａの
孔周壁ｂを掘進に伴って削落及び打叩を交互に繰り返し
強固に圧密された孔周壁ｂを築造し、且つまた上記切欠
面４による孔周壁ｂとの空隙ｃの形成により、オーガ抜
扞時に発生する吸引作用による孔周壁ｂの崩壊現象を阻
止し、地中に剛強な掘孔を掘削行わしめることを特徴と
する基礎地盤の掘孔工法。1. An auger casing 3 in which a notch surface 4 is formed by recessing the front and rear or left and right surfaces in a longitudinal direction at a constant depth in a coaxial upper portion of an auger head 1 having a cutting edge 2 at a tip portion. It is intended to excavate the ground using a ground drilling device that is integrally connected and formed, and suspends the above device on a pile driver and temporarily strikes it on a predetermined ground, and then powers the device. In the case of digging the ground by rotationally driving it while applying a load, the ground is advanced by the above-mentioned digging blade 2, and at the same time, the front and rear cut surfaces 4 formed on the auger casing 3 of the digging device are rotated by the action of the front and back. The hole peripheral wall b of the pile hole a to be dug by the digging blade 2 is built up by forming the hole peripheral wall b which is strongly consolidated by repeating cutting and tapping alternately with the progress of the excavation, and also by the cutout surface 4. Suction that occurs when removing the auger due to the formation of void c with b A method for digging a foundation ground, which prevents a collapse phenomenon of a hole circumferential wall b due to an action and excavates a strong digging hole in the ground.
１の同軸上部に、オーガー軸周面の前後面を縦軸方向に
一定の深さに凹欠して切欠面４を形成せるオーガーケー
シング３を一体的に連結せしめたことを特徴とする基礎
地盤の掘孔装置。2. A notch surface 4 is formed in a coaxial upper portion of an auger head 1 having a cutting edge 2 at its tip end by notching the front and rear surfaces of the auger shaft peripheral surface in the longitudinal direction at a constant depth. A drilling device for a foundation ground, wherein the auger casing 3 is integrally connected.
縦軸方向に一定の深さに凹欠せる切欠面４，４を該オー
ガーケーシング３の全長にわたって形成設けることな
く、上記形状の切欠面４を同軸上に適宜の間隔を隔てて
交互に切欠せしめたことを特徴とする基礎地盤の掘孔装
置。3. The above-mentioned auger casing 3 is formed without providing notch surfaces 4 and 4 which can be formed by recessing the front and rear surfaces of the shaft peripheral surface in the longitudinal direction to a predetermined depth. A drilling device for a foundation ground, characterized in that notched surfaces 4 of a shape are coaxially and alternately cut at appropriate intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7269167A JP2879135B2 (en) | 1995-09-21 | 1995-09-21 | Drilling method and equipment for foundation ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7269167A JP2879135B2 (en) | 1995-09-21 | 1995-09-21 | Drilling method and equipment for foundation ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0988062A true JPH0988062A (en) | 1997-03-31 |
| JP2879135B2 JP2879135B2 (en) | 1999-04-05 |
Family
ID=17468621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7269167A Expired - Fee Related JP2879135B2 (en) | 1995-09-21 | 1995-09-21 | Drilling method and equipment for foundation ground |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2879135B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017082402A (en) * | 2015-10-23 | 2017-05-18 | 地研テクノ株式会社 | Drilling and injection rod for pile construction, and pile construction method using the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0235187A (en) * | 1988-04-21 | 1990-02-05 | Teruo Koi | Execution device for foundation pile |
| JPH0768838A (en) * | 1993-09-06 | 1995-03-14 | Rohm Co Ltd | Integrated circuit device for driving element and luminous device |
-
1995
- 1995-09-21 JP JP7269167A patent/JP2879135B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0235187A (en) * | 1988-04-21 | 1990-02-05 | Teruo Koi | Execution device for foundation pile |
| JPH0768838A (en) * | 1993-09-06 | 1995-03-14 | Rohm Co Ltd | Integrated circuit device for driving element and luminous device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017082402A (en) * | 2015-10-23 | 2017-05-18 | 地研テクノ株式会社 | Drilling and injection rod for pile construction, and pile construction method using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2879135B2 (en) | 1999-04-05 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |