JPH07189248A - Method of pit excavation construction of foundation ground and device thereof - Google Patents
Method of pit excavation construction of foundation ground and device thereofInfo
- Publication number
- JPH07189248A JPH07189248A JP34800493A JP34800493A JPH07189248A JP H07189248 A JPH07189248 A JP H07189248A JP 34800493 A JP34800493 A JP 34800493A JP 34800493 A JP34800493 A JP 34800493A JP H07189248 A JPH07189248 A JP H07189248A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- auger
- ground
- pit
- blade
- 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
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共に該掘孔内の崩壊を防止
し、より強固な孔壁を有した地盤層を築造行わしめんと
する基礎地盤の掘孔工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 is very easy and reliable to dig a foundation ground for construction, prevents collapse in the pit, and constructs a ground layer having a stronger hole wall. The present invention relates to a method of drilling a foundation ground and its equipment.
【０００２】[0002]
【従来の技術】従来、建築等基礎地盤造成工法に地中に
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 having 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】即ち、この発明者は先
に地中掘進と同時にスクリュー翼片の周縁に圧土縁を形
成せる円錐形スクリューオーガーを用いて地中を掘削時
に該掘削土壌を上記円錐面及び圧土縁の作用にて孔周壁
を圧密しより強固な孔壁を造成すると共に地上への揚土
量を寡少としようとする所謂無排土の地盤掘孔装置（特
許第１１３６１７７号）及びオーガーロッド周面を三角
または四角形面に形成し、該形成面によって上記と同様
に掘削土壌を掘孔周部に押圧して強固な孔壁を造成しよ
うとする掘孔装置（特許第１３０８０２２号）を発明し
業界においても好評を呈していた。しかるに上記装置は
共に掘削土壌を掘孔周部に拡開押圧し殆ど無排土で強固
な孔壁が造成出来得るという利点を有している反面、オ
ーガ抜扞時に上記孔壁とオーガー面が密接しているがた
めに空気の逃げ場がなくこれが原因にて上記掘削孔内に
急激な吸引力が発生し折角、強固に圧締せる孔壁が抜扞
時に崩壊する等の欠点があった。また上記、抜扞作業を
若干遅緩行わしめることによって幾分かの崩壊が防止出
来得たとしても当然作業に支障を生ぜしめることは必至
であり、例え作業の能率化を挙げ得るためにスピードア
ップをすればより上記吸引力が増加し杭柱の挿入が全く
不可能であることが判明した。この発明は上記、地中掘
削時に地中に空気の逃げ場としての空隙ｃを積極的に形
成設けることによって、該孔内に逆吸引力が発生し孔内
の崩壊を未然に阻止すると共に該空隙ｃ内にモルタル等
の凝結材の充填によりより強固な孔壁を有した基礎杭打
設用としての支持地盤を造成しようとするをその主な目
的としている。That is, the inventor of the present invention firstly uses a conical screw auger that forms a compacted soil edge on the periphery of a screw wing piece at the same time as excavating the soil to excavate the excavated soil when excavating the soil. By the action of the conical surface and the soil edge, the hole peripheral wall is compacted to form a stronger hole wall, and the amount of soil lifted to the ground is minimized. No.) and an auger rod peripheral surface are formed into a triangular or quadrangular surface, and the forming surface is used to press the excavated soil against the peripheral portion of the drill hole to form a strong hole wall (Patent No. Invented No. 1308022) and was well received in the industry. However, both of the above devices have the advantage that they can spread and press the excavated soil to the periphery of the hole to create a strong hole wall with almost no soil discharge, while the hole wall and auger surface are Since they are in close contact with each other, there is no escape area for air, which causes a sudden suction force in the excavation hole, which causes a drawback that the hole wall that can be firmly clamped collapses at the time of withdrawal. In addition, even if it is possible to prevent some collapse by slowing down the pulling work a little, it is inevitable that it will hinder the work, and speed can be increased in order to improve work efficiency. It became clear that the above-mentioned suction force was further increased by upsizing, and it was impossible to insert the pile pillar at all. According to the present invention, by positively forming the void c as an air escape area in the ground during the underground excavation, a reverse suction force is generated in the hole to prevent collapse in the hole and the void. Its main purpose is to construct a support ground for laying foundation piles having a stronger hole wall by filling a setting material such as mortar in c.
【０００４】[0004]
【課題を解決するための手段】上記、目的を達成する手
段としてこの発明に係る掘孔装置は、図面にてその一例
を示している如く先端部に適宜形状の先掘刃３を付設
し、且つ該上部に数枚のスクリュー翼片２を一体的に付
設してなるオーガーヘッド１の上部に、全体形状を略円
錐形状とし、且つ該円錐形面ｂに上記スクリュー翼片２
と略同径寸αのスクリュー５を付設すると共に該スクリ
ュー５の周縁に圧土面５｀を形成設け、更に該スクリュ
ー前後面または前後左右面に平坦切欠面Ａを凹設してな
るスクリューオーガー４を上記オーガーヘッド１と同軸
上に取り外し自在に一体的に連設せしめたことを特徴と
する基礎地盤の掘孔装置を提供しようとするものであ
る。As a means for achieving the above-mentioned object, a drilling device according to the present invention is provided with a tip-shaped cutting blade 3 having an appropriate shape at its tip end, as shown in the drawings by way of example. In addition, the whole shape of the auger head 1 having a plurality of screw blades 2 integrally attached to the upper portion is made substantially conical, and the screw blade 2 is formed on the conical surface b.
A screw auger in which a screw 5 having substantially the same diameter α as that is attached is provided, a soil compaction surface 5 ′ is formed on the peripheral edge of the screw 5, and flat cutouts A are further provided on the front and rear surfaces of the screw or front, rear, left and right surfaces. It is an object of the present invention to provide a boring device for a foundation ground, wherein the auger head 1 and the auger head 1 are detachably and integrally connected to each other.
【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、先ず装置全体を杭打機にセットして所定地
上に定置し、しかる後に動力を介してアースオーガー軸
６の回転と同時にオーガーヘッド１及びスクリューオー
ガー４を駆動回転行わしめることによってオーガーヘッ
ド１先端の先掘刃３が回転し先端地盤を撹乱しながら掘
進する。また上記、掘進と同時にスクリュー翼片２及び
スクリューオーガー４が回転し、夫々上下のスクリュー
の外周面と円錐形面ｂの作用によって上記、掘削土壌を
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上記スクリューオーガー４のス
クリュー５外周に凹設せる平坦切欠面Ａの角縁部分にて
孔周を切開すると同時にスクリュー５の周縁外周に形成
せる圧土面５｀と円錐面との作用により上記切削土壌を
孔周に強力に押圧し以て強固な圧密孔壁を有した基礎杭
打設用としての杭孔を所定地中に確実容易に施工行わし
めることが出来得るのである。特にこの発明においては
上記、孔壁圧締と同時にスクリューオーガー４面に平坦
切欠面Ａが設けられているがためにオーガと孔壁間に空
隙ｃが形成され該空隙ｃをし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と共に該空隙部ｃ内
にモルタルを充填することによって地中にモルタル柱を
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 digging a foundation ground by the above-mentioned device. First, the whole device is set on a pile driver and placed on a predetermined ground, and then the rotation of the earth auger shaft 6 is performed via power. At the same time, by driving and rotating the auger head 1 and the screw auger 4, the tip cutting blade 3 at the tip of the auger head 1 is rotated, and the tip ground is disturbed to advance. Further, the screw blade piece 2 and the screw auger 4 rotate at the same time as the excavation, and the outer peripheral surfaces of the upper and lower screws and the conical surface b respectively push the excavated soil upward while expanding it to the hole peripheral wall surface. Tighten.
Simultaneously with such rotary excavation, the hole periphery is incised at the corner edge portion of the flat notched surface A formed in the outer periphery of the screw 5 of the screw auger 4, and at the same time, the soil surface 5'and the conical surface formed on the outer periphery of the peripheral edge of the screw 5 are formed. By the action of the above, it is possible to surely and easily construct a pile hole for laying a foundation pile having a strong consolidation hole wall by strongly pressing the cutting soil around the hole in the predetermined ground. . Particularly, in the present invention, since the flat notch surface A is provided on the screw auger 4 surface at the same time as the hole wall compression, the space c is formed between the auger and the hole wall, and the space c is formed to form the auger. The mortar pillars can be easily installed in the ground by naturally introducing muddy soil such as air that is congested between the hole walls to suppress the suction force inside the holes during removal and filling the voids c with mortar. It is possible to carry out the construction reliably.
【０００６】[0006]
【実施例】以下、この発明の実施例を詳細に説明する
と、１は周部に一定径寸巾αを有してなるらせん翼片２
を付設すると共に該先端部分に先掘刃３を一体的に取付
けせるオーガーヘッドである。また４は上下全体周面を
略円錐形面ｂに形成すると共に該円錐形面ｂに上記、先
端オーガーヘッド１のらせん翼片２の径寸巾αと略同径
寸巾で且つ周部に適当な肉圧の圧土面５｀を設けたスク
リュー５を一体的に付設してなるスクリューオーガー４
である。更に上記、円錐形スクリューオーガー４面に付
設せるスクリュー５の前後部分を上下一定深さに凹欠し
平坦切欠面Ａ、Ａ部分をスクリュー前後に形成してなる
もので横断面形状が恰も長方形状に形成されている。こ
の発明に係る掘孔装置は上記形状のオーガーヘッド１の
上部にスクリューオーガー４を同軸上に一体的に連設し
て用いるものであって、更に施工時に該スクリューオー
ガー４の上部に適当な連結座９を介して横断面円形、三
角形、四角形等の如く適当形状のオーガー軸６を連結し
て用いる。なお符号７は上記オーガー軸６、スクリュー
オーガー４、オーガーヘッド１内を縦貫してなるモルタ
ル送注管であってその先端下方はヘッド先端に開孔せる
モルタル噴射孔８に連通連結されている。Embodiments of the present invention will now be described in detail. Reference numeral 1 is a spiral wing piece 2 having a constant diameter dimension α in its peripheral portion.
Is an auger head to which the cutting blade 3 can be integrally attached to the tip portion. The reference numeral 4 indicates that the entire upper and lower peripheral surfaces are formed into a substantially conical surface b, and that the conical surface b has substantially the same diameter and width as the diameter width α of the spiral wing piece 2 of the tip auger head 1 and its peripheral portion. A screw auger 4 which is integrally provided with a screw 5 having a compacted soil surface 5'having an appropriate meat pressure.
Is. Further, the front and rear parts of the screw 5 attached to the surface of the conical screw auger 4 are notched to a certain depth in the vertical direction, and flat cut surfaces A and A are formed in the front and rear of the screw. Is formed in. The drilling device according to the present invention uses a screw auger 4 coaxially and integrally connected to the upper portion of the auger head 1 having the above-described shape, and further connects the screw auger 4 to the upper portion of the screw auger 4 at the time of construction. An auger shaft 6 having an appropriate shape such as a circular cross section, a triangle, a quadrangle, etc. is connected through a seat 9 and used. Reference numeral 7 is a mortar injection pipe that extends vertically through the auger shaft 6, the screw auger 4, and the auger head 1. The lower end of the mortar injection pipe is connected to a mortar injection hole 8 that is opened at the tip of the head.
【０００７】またスクリューオーガー４のスクリュー５
部分に形成せる上記、平坦切欠面Ａを図３に示す如く上
記前後面と併わせて左右両側面に、即ちスクリュー５の
一部を残して略四角形に平坦切欠面Ａを凹欠設けること
も一考である。Further, the screw 5 of the screw auger 4
As shown in FIG. 3, the flat notch surface A formed in a portion may be provided on both left and right side surfaces together with the front and rear surfaces, that is, the flat notch surface A may be recessed in a substantially quadrangular shape with a part of the screw 5 left. This is a consideration.
【０００８】[0008]
【発明の効果】この発明に係る地盤掘孔装置は上記の如
く、オーガーヘッド１の上部にスクリュー５の前後部分
を一定の深さに凹欠し平坦切欠面Ａ、Ａを形成してなる
スクリューオーガー４を連設してなるものであるから、
地中掘進時において該掘削と同時に地中に所定径寸巾α
の空隙ｃ部を確実容易に掘削することが出来得、かかる
空隙ｃの造成によって孔内の空気の逃げ場となり、これ
が従来オーガー抜扞時に生じる孔内の吸引力が原因と謂
われていた地中の崩壊を未然に阻止すると共に該空隙ｃ
をして上記とは逆に吸引力を地中に引き戻し地中の空気
はもとより泥水、柔泥土壌等を導入する作用をも有し、
以て爾後作業を著しく容易確実に行わしめる等顕著な効
果がある。しかも上記、スクリューオーガー４の円錐形
面ｂに付設せるスクリュー５の圧土面５｀と円錐形面ｂ
の作用によって地中の掘削土壌を上方に移動させ、該土
壌を掘削孔周に拡開圧締し強固な圧密壁を造成すると共
に排土量をも著しく寡少とする効果も併せ有している。As described above, the ground drilling device according to the present invention is a screw which is formed by flatly notching the front and rear portions of the screw 5 in the upper portion of the auger head 1 to a certain depth to form flat cut surfaces A, A. Since it is made up of auger 4 connected in series,
When excavating into the ground, a predetermined diameter dimension α
It is possible to reliably and easily excavate the void c part, and the creation of such a void c serves as an escape area for the air in the hole, which was conventionally caused by the suction force in the hole that is generated when removing the auger. To prevent the collapse of
And contrary to the above, it also has the effect of pulling back the suction force into the ground and introducing muddy water, mud soil, etc. as well as the air in the ground,
Therefore, there is a remarkable effect that the subsequent work can be performed extremely easily and surely. Moreover, the above-mentioned soil surface 5'of the screw 5 attached to the conical surface b of the screw auger 4 and the conical surface b
By the action of, the excavated soil in the ground is moved upward, and the soil is expanded and clamped around the excavation hole to form a strong consolidation wall, and at the same time it has the effect of significantly reducing the amount of excavated soil. .
【０００９】また請求項２項記載の如く、スクリューオ
ーガー４のスクリュー５部分の前後面と併わせて左右両
側面に、即ち略四角形の平坦切欠面Ａを凹欠設けること
によって施工地盤等に適応し施工時に生じる摩擦抵抗も
上記前後面の凹設形状に比して寡小でありより円滑良好
な回転掘削を求めることが出来得るのである。Further, as described in claim 2, it is adapted to the construction ground or the like by providing a concave cutout on both left and right side surfaces of the screw 5 of the screw auger 4 along with the front and rear surfaces, that is, a substantially rectangular flat cutout surface A. The frictional resistance generated during construction is also smaller than that of the recessed shape on the front and rear surfaces, and smoother and better rotary excavation can be sought.
【図１】 この発明に係る地盤掘孔装置の正面図FIG. 1 is a front view of a ground drilling device according to the present invention.
【図２】 同上、要部横断面図[FIG. 2] Same as the above, a cross-sectional view of the main part
【図３】 他の実施態様による同上断面図、FIG. 3 is a sectional view of the same as above according to another embodiment;
【図４】 地盤掘削状体図である。FIG. 4 is a ground excavation diagram.
１ オーガーヘッド ２ スクリューオーガー Ａ 平坦切欠面 1 Auger head 2 Screw auger A Flat cut surface
Claims (3)
寸巾αを有したスクリュー翼片２を一体的に付設形成し
てなるオーガーヘッド１の上部に、全体形状を略円錐形
状とし、該円錐形面ｂ上下に上記スクリュー翼片２と略
同径寸巾αで且つ周縁に圧土面５｀を形成してなるスク
リュー５を付設すると共に該スクリュー５の前後面また
は前後左右面に一定の深さに凹欠せる平坦切欠面Ａを凹
設せるスクリューオーガー４を同軸上に一体的に連設
し、更に該スクリューオーガー４の上部にオーガー軸６
を連結してなる地盤掘孔装置を杭打機に吊設して所定地
盤に建込みし、動力を介してオーガー、ヘッドを回転駆
動し地盤を掘孔しようとするものであって、上記スクリ
ューオーガー４面に凹設せる平坦切欠面Ａの作用により
掘孔内に空隙ｃを削設し、オーガ抜扞時に発生する吸引
作用を抑制すると同時に該孔内に逆吸引力を生ぜしめ孔
内に起成せる崩壊現象を阻止行わしめながら所定地盤に
杭打設用杭孔を施工しようとする基礎地盤の掘孔工法。1. An auger head 1 formed by integrally forming a blade portion 2 at the tip and a screw blade piece 2 having a constant diameter dimension α on the upper portion, and having a substantially whole shape. A screw 5 having a conical shape and having substantially the same diameter and width α as the screw blade 2 above and below the conical surface b and having a compressed soil surface 5'at its peripheral edge is attached to the front and rear surfaces of the screw 5 or A screw auger 4 having a flat cutout surface A that can be recessed at a constant depth is formed on the front, rear, left, and right surfaces so as to be coaxially and integrally connected. Further, an auger shaft 6 is provided on the upper portion of the screw auger 4.
A ground drilling device that is connected to a pile driving machine is hung on a pile driving machine and built in a predetermined ground, and an auger and a head are driven to rotate by power to drill a ground, and the screw is used. Due to the action of the flat cut surface A that is recessed in the auger 4 surface, a void c is cut in the drill hole to suppress the suction action that occurs when removing the auger and at the same time to generate a reverse suction force in the hole. A method of drilling a foundation ground that tries to construct a pile hole for pile driving on a predetermined ground while preventing the collapse phenomenon that can occur.
且つ該上部に数枚のスクリュー翼片２を一体的に付設し
てなるオーガーヘッド１の上部に、全体形状を略円錐形
状とし、該円錐形面ｂに上記スクリュー翼片２と略同径
寸巾αで且つスクリュー周縁に圧土面５｀を形成設けて
なるスクリュー５を付設すると共に該スクリュー５の前
後面に一定の深さに凹欠せる平坦切欠面Ａを形成せしめ
たスクリューオーガー４を上記オーガーヘッド１に取り
外し自在に一体的に連結せめたことを特徴とする基礎地
盤の掘孔装置。2. A tip drilling blade 3 having an appropriate shape is attached to the tip end,
In addition, the whole shape of the auger head 1 having a plurality of screw blades 2 integrally attached to the upper portion is made substantially conical, and the conical surface b has substantially the same diameter as the screw blades 2. A screw auger 4 having a width α and a screw 5 formed by forming a compressed soil surface 5'on the peripheral edge of the screw 5 and a flat notched surface A which can be recessed at a constant depth is formed on the front and rear surfaces of the screw 5. A boring device for a foundation ground, which is detachably and integrally connected to the auger head 1.
つ該上部に数枚のスクリュー翼片２を一体的に付設して
なるオーガーヘッド１の上部に、全体形状を略円錐形状
とし、且つ該円錐形面ｂに上記スクリュー翼片２と略同
径寸巾αのスクリュー５を付設すると共に該スクリュー
５の外周縁に圧土面５｀の一部を残こして前後左右四面
に横断面略正方形の平坦切欠面Ａを形成してなるスクリ
ューオーガー４を一体的に連設せしめたことを特徴とす
る請求項２項記載の基礎地盤の掘孔装置。3. An auger head 1 having an appropriately shaped cutting blade 3 attached to the tip thereof and several screw blades 2 integrally attached to the upper portion thereof. A screw 5 having the same shape as that of the screw blade 2 and having a diameter α substantially the same as the screw blade 2 is attached to the conical surface b. 3. A drilling device for foundation ground according to claim 2, wherein screw augers 4 each having a flat notched surface A having a substantially square cross section are formed continuously on four sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34800493A JPH07116707B2 (en) | 1993-12-24 | 1993-12-24 | Drilling method for foundation ground and its equipment. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34800493A JPH07116707B2 (en) | 1993-12-24 | 1993-12-24 | Drilling method for foundation ground and its equipment. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07189248A true JPH07189248A (en) | 1995-07-28 |
| JPH07116707B2 JPH07116707B2 (en) | 1995-12-13 |
Family
ID=18394091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34800493A Expired - Lifetime JPH07116707B2 (en) | 1993-12-24 | 1993-12-24 | Drilling method for foundation ground and its equipment. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07116707B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2377235A (en) * | 2001-07-17 | 2003-01-08 | Cie Du Sol | Drilling tool |
| JP4583492B1 (en) * | 2009-08-19 | 2010-11-17 | 泉 徳江 | Soil improvement equipment |
| WO2012059968A1 (en) * | 2010-11-01 | 2012-05-10 | 株式会社マグハウス | Soil improvement device |
| TWI397372B (en) * | 2010-11-04 | 2013-06-01 | Maghouse Kk | Soil improvement apparatus, and its use of the nozzle, and the soil improvement method using the soil improving apparatus |
-
1993
- 1993-12-24 JP JP34800493A patent/JPH07116707B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2377235A (en) * | 2001-07-17 | 2003-01-08 | Cie Du Sol | Drilling tool |
| JP4583492B1 (en) * | 2009-08-19 | 2010-11-17 | 泉 徳江 | Soil improvement equipment |
| JP2011062081A (en) * | 2009-08-19 | 2011-03-31 | Izumi Tokue | Soil-improving tool |
| WO2012059968A1 (en) * | 2010-11-01 | 2012-05-10 | 株式会社マグハウス | Soil improvement device |
| AU2010363437B2 (en) * | 2010-11-01 | 2015-11-19 | Kabushiki Kaisha Maghouse | Soil improvement device |
| TWI397372B (en) * | 2010-11-04 | 2013-06-01 | Maghouse Kk | Soil improvement apparatus, and its use of the nozzle, and the soil improvement method using the soil improving apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07116707B2 (en) | 1995-12-13 |
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