JPS626074B2 - - Google Patents
Info
- Publication number
- JPS626074B2 JPS626074B2 JP53154042A JP15404278A JPS626074B2 JP S626074 B2 JPS626074 B2 JP S626074B2 JP 53154042 A JP53154042 A JP 53154042A JP 15404278 A JP15404278 A JP 15404278A JP S626074 B2 JPS626074 B2 JP S626074B2
- Authority
- JP
- Japan
- Prior art keywords
- screw
- ground
- excavation
- head
- hole
- 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
Links
- 238000009412 basement excavation Methods 0.000 claims description 26
- 238000005253 cladding Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 238000005553 drilling Methods 0.000 claims description 11
- 239000002689 soil Substances 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 5
- 239000011435 rock Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- -1 reinforcing bars Substances 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Description
【発明の詳細な説明】
この発明は岩、鉄筋あるいは鉄骨コンクリート
などの障害物が埋設する地盤でのアースオーガー
工法に関し、その目的は障害地盤であつてもアー
スオーガー工法で確実かつ簡易に屈曲のない直進
孔を堀削できる工法の提供にある。[Detailed Description of the Invention] This invention relates to an earth auger construction method in the ground where obstacles such as rocks, reinforcing bars, or steel concrete are buried. The purpose of this invention is to provide a method that allows drilling straight holes.
一般に地盤中に障害物が存在する硬質地盤に構
築物又は地盤改造等の目的で土木工事を施行する
際の基礎工事のなかにコンクリート坑、Ｈ型鋼、
矢板などを打設する工程がある。 Concrete pits, H-beams,
There is a process of driving sheet piles etc.
従来この工程の予備工程である坑の埋設孔の削
孔法として、オーガスクリユウ（以下スクリユウ
と略す。）で削孔を行う他の工法より秀れた無振
動、無騒音のアースオーガ工法が有名である。 Conventionally, the earth auger method, which is a vibration-free and noise-free method that is superior to other methods of drilling holes using an auger screw (hereinafter abbreviated as screw), has been used as a preliminary step for this process. Famous.
ところがこの工法にあつては、第３図において
示す如く、削孔中に地盤３１に埋設する障害物３
２にスクリユウ３３が当接するとスクリユウは堀
削方向イへの前進が阻害され、この障害物を破砕
するためなおスクリユウにトルクを与え堀削を続
行しようとすると、岩等障害物が大型でその破砕
部分が堀削直進方向外であればその方向ロへある
いは障害物が堀削方向の一方端とあれば軟質地盤
３１ａであるその反対方向ロへスクリユウが屈折
して進行しつまり削孔が斜堀進して堀削方向が歪
み、従来の障害地盤でのアースオーガ工法によつ
て構設した堀削孔は殆んど所期の直線的なものと
はならないという問題があつた。しかも、削孔に
よる土砂はスクリユウスレツド（螺施条）に従つ
てスクリユウの回転に伴い地上に排土されるが、
この時堀削方向が歪んでいれば削孔壁３１ｂとス
クリユウおよび土砂が摩擦して削孔壁面が荒らさ
れて孔が崩壊するという欠点を招来していた。 However, in this construction method, as shown in Fig. 3, obstacles 3 buried in the ground 31 during drilling
When the screw 33 comes into contact with 2, the advance of the screw in the excavation direction A is obstructed, and when trying to continue excavation by applying torque to the screw to crush this obstacle, the obstacle such as a rock is large and the If the fractured part is outside the straight direction of excavation, the screw will be bent and proceed in that direction, or if an obstacle is at one end in the excavation direction, it will bend and proceed in the opposite direction, which is the soft ground 31a. There was a problem in that the direction of excavation was distorted as the excavation proceeded, and the excavation holes constructed using the conventional earth auger method on faulty ground were almost never as straight as expected. Moreover, the earth and sand from drilling is discharged to the ground as the screw rotates according to the screw thread.
At this time, if the drilling direction is distorted, the drilling wall 31b, the screw, and the earth and sand will rub against each other, resulting in a disadvantage that the drilling wall surface will be roughened and the hole will collapse.
上記事情に鑑みこの発明者は、障害地盤の直進
堀削法に関し長年にわたり鋭意研究を続けた結
果、中空円筒状で外周面に排土孔を有する鋼管で
スクリユウを覆つた特定のアースオーガ機を用い
て堀削するとスクリユウの屈折を防止できること
を見い出し、このオーガ機を使用して障害地盤の
直進堀削工法を完成しこの発明に到達した。 In view of the above circumstances, the inventor has conducted intensive research over many years on methods for straight excavation of faulty ground, and has developed a specific earth auger machine in which the screw is covered with a hollow cylindrical steel pipe with soil removal holes on the outer circumferential surface. They discovered that the bending of the screw can be prevented by using this auger for excavation, and they completed a straight-advance excavation method for troubled ground using this auger machine, resulting in this invention.
図面は、この発明工法の一実施例を示すもので
以下図面に基いてこの発明を説明する。 The drawings show one embodiment of the construction method of this invention, and the invention will be explained below based on the drawings.
第１図はこの発明工法において使用するアース
オーガ機の堀削部で、この図において１はその先
端にスクリユウヘツド２を有する軸３とスクリユ
ウスレツド４からなるスクリユウ、５はこのスク
リユウ１と、スクリユウ１の外径d1より大きい外
径d2を有するスクリユウヘツド２とをボルトなど
の所要手段で連結させた結合部である。ヘツド２
の長さはスレツド４１の１ピツチ（スレツドの巻
始から巻終即円周１巻分を云う）の２倍のピツチ
を１ピツチとしてスレツド４２が２条もしくは３
条分となる所要長で、その先端には特殊超硬金か
らなるビツト６を多数装着している。 Figure 1 shows the excavation part of the earth auger machine used in this invention. In this figure, 1 is a screw consisting of a shaft 3 having a screw head 2 at its tip and a screw thread 4; , and a screw head 2 having an outer diameter d 2 larger than the outer diameter d 1 of the screw 1 are connected by necessary means such as bolts. Head 2
The length of thread 42 is two or three threads, with one pitch being twice the pitch of thread 41 (meaning one circumference from the start to the end of the thread).
It has the required length as a strip, and a large number of bits 6 made of special carbide gold are attached to the tip.
７は中空円筒状で上端部８がオーガ機の駆動部
９に熔接等の所要手段で固定され下端部１０がス
クリユウ１とヘツド２との結合部５にまで至つて
スクリユウを保護する被覆管であり、この被覆管
７は内径d3がスクリユウ１の外径d1より大きくそ
の間隙が外径d1の１／30〜１／100程度になるよ
うに、また、外径がヘツド２の外径d2よりやや小
さくなるように形成され、且つその外周面には所
要形状好ましくは長径40cm、短径30cm程度の楕円
形の排土孔７ａが所要間隔望ましくは1.5ｍ程度
の間隔で開口されている。 7 is a hollow cylindrical cladding tube whose upper end 8 is fixed to the driving part 9 of the auger machine by a necessary means such as welding, and whose lower end 10 extends to the connecting part 5 between the screw 1 and the head 2 to protect the screw. The cladding tube 7 is designed so that the inner diameter d 3 is larger than the outer diameter d 1 of the screw 1 and the gap is about 1/30 to 1/100 of the outer diameter d 1 , and the outer diameter is larger than the outer diameter of the head 2. It is formed to have a diameter slightly smaller than d2 , and oval soil discharge holes 7a having a required shape, preferably about 40 cm in major diameter and 30 cm in minor diameter, are opened on its outer peripheral surface at required intervals, preferably about 1.5 m. ing.
この発明において、スクリユウ１と被覆管７と
の間隔をスクリユウ１の外径d1の１／30〜１／
100程度としたのは間隙がこの値より大きいとス
クリユウ１の屈折を充分に防止できず、またこの
値より小さいとスクリユウ１と被覆管７との間に
摩擦が生じスクリユウスレツド４が損傷する等の
弊害が生じるためである。また排土孔７ａの開口
面積は大きすぎると被覆管７の強度が低下するか
ら望ましくなくまた小さすぎると排土能率が低下
するから両者を適宜勘案して所要値を定めればよ
い。 In this invention, the distance between the screw 1 and the cladding tube 7 is set to 1/30 to 1/3 of the outer diameter d 1 of the screw 1.
The reason for setting the gap to about 100 is that if the gap is larger than this value, bending of the screw 1 cannot be sufficiently prevented, and if it is smaller than this value, friction will occur between the screw 1 and the cladding tube 7, damaging the screw thread 4. This is because such harmful effects may occur. Further, if the opening area of the soil removal hole 7a is too large, the strength of the cladding tube 7 will be reduced, which is undesirable, and if it is too small, the soil removal efficiency will be reduced, so the required value may be determined by taking these two factors into consideration.
以上のような堀削部をもつアースオーガ機を用
いて障害地盤の直進堀削を行うこの発明工法の一
実施例を第２図に基いて説明すると、まず所期径
および深度の堀削孔場所１１に堀削部のヘツド２
を打設し、図外オーガ機の駆動源９ａよりスクリ
ユウ１を通して回転を伝える。スクリユウヘツド
２は地盤１２を削孔してほぼその外径d2と等しい
径の孔を構設する。この削孔時地盤１２中の障害
物１３にヘツド３が当接すると、この障害物１３
を破砕すべく図外オペレータが同じく図外オーガ
機を操作する。この操作によつて、仮りに障害物
１３がヘツド２の進行方向ハに若干角度を有する
状態で破砕されてその方向へヘツドが逃げようと
しても、被覆管７がスクリユウ１を直線的に保持
してヘツド２は屈折できず、従つて堀削方向前面
の障害物１３が完全に破砕できるまでヘツド２で
の破砕を連続し、斯る後削孔する。 One embodiment of this invention method, which uses an earth auger machine having the above-mentioned excavation section to excavate faulty ground in a straight line, will be explained based on Fig. 2. Head 2 of the excavation part at location 11
The rotation is transmitted through the screw 1 from the drive source 9a of the auger machine (not shown). The screw head 2 is constructed by drilling a hole in the ground 12 and constructing a hole having a diameter approximately equal to its outer diameter d2 . When the head 3 comes into contact with an obstacle 13 in the ground 12 during drilling, this obstacle 13
An operator (not shown) operates an auger machine (not shown) to crush the material. By this operation, even if the obstacle 13 were to be crushed at a slight angle to the traveling direction of the head 2 and the head would try to escape in that direction, the cladding tube 7 would hold the screw 1 straight. Since the head 2 cannot be bent, the crushing by the head 2 is continued until the obstacle 13 in front in the excavation direction is completely crushed, and the hole is then drilled.
こうして被覆管７に保護されたスクリユウ１に
連結するスクリユウヘツド２は、その外径d2にほ
ぼ等しい径d2′の孔を削孔するが、この孔径は被
覆管７の外径にやや等しいから被覆管７の外側面
は削孔壁１４を保護しながら堀進する。この際生
じる堀削土１５はスクリユウ１の回転に従いスレ
ツド４（４１，４２）に伴つて管７内部を上昇す
る。管７内部を上昇し地表面１６にまで達した堀
削土を、地上に最も近い排土孔７ａより地上に排
土する。 The screw head 2 connected to the screw 1 protected by the cladding tube 7 has a hole with a diameter d 2 ' approximately equal to the outer diameter d 2 of the screw head 2, but this hole diameter is slightly smaller than the outer diameter of the cladding tube 7. Since they are equal, the outer surface of the cladding tube 7 is excavated while protecting the borehole wall 14. The excavated soil 15 generated at this time rises inside the pipe 7 along with the threads 4 (4 1 , 4 2 ) as the screw 1 rotates. The excavated soil that has risen inside the pipe 7 and reached the ground surface 16 is discharged to the ground through the soil discharge hole 7a closest to the ground.
この操作を連続して所期深度に達するまで削孔
すると、所期の径および深度の直進孔が障害地盤
に構成できる。 If this operation is continued until the hole is drilled until the desired depth is reached, a straight hole of the desired diameter and depth can be formed in the faulty ground.
以上詳述した如くこの発明工法に係る障害地盤
の堀削法は、スクリユウ１との間隙がスクリユウ
１の外径d1の１／30〜１／100程度になるように
形成されスクリユウ１を保護する被覆管７を設け
た堀削部を有する特定のオーガ機を用いることと
したから、従来の如くスクリユウ１が障害物１３
に依つて屈折して堀削方向が歪むあるいは堀削孔
が歪むことによつてスクリユウ１が堀削孔壁を崩
壊させ、ひいては堀削孔そのものを崩壊するとい
つた弊害を排して、この被覆管７がスクリユウ１
と摩擦を生じスクリユウレツド４を損傷する等の
欠点もなくスクリユウ１の屈折を効果的に抑止し
て堀削方向延長の障害物が完全に破砕されるまで
堀進せずかつ孔壁は孔壁の外径とほぼ等しい径の
被覆等の外側面で保護されて堀進できるから、如
何なる障害物が地盤中に埋設する障害地盤であつ
ても、ほぼ完全に直進堀削でき従つて孔壁の破壊
等が全く生じず、加えて、排出孔７ａの大きさに
応じある程度の大きさを持つ堀削土、堀削岩を
も、そのまま排出でき従つて、障害物を微粉状に
粉砕する必要がなく堀削時間や労力を軽減できる
堀削法である。 As detailed above, the method of excavating the faulty ground according to the invention method is such that the gap between the screw 1 and the screw 1 is approximately 1/30 to 1/100 of the outer diameter d 1 of the screw 1 to protect the screw 1. Since it was decided to use a specific auger machine having a digging section provided with a cladding tube 7, the screw 1 can be easily removed from the obstacle 13 as in the conventional case.
This coating eliminates the problem of the screw 1 collapsing the wall of the excavation hole due to bending and distortion of the excavation direction or distortion of the excavation hole, and even the collapse of the excavation hole itself. Tube 7 is screw 1
This effectively suppresses the bending of the screw 1 without creating friction and damaging the screw lead 4, and the hole wall does not move forward until the obstruction in the excavation direction is completely crushed. Since digging can be done while being protected by the outer surface of the covering, which has a diameter approximately equal to the outside diameter, it is possible to dig almost completely straight, even if there are obstacles buried in the ground, which prevents destruction of the hole wall. In addition, excavated soil and excavated rock having a certain size depending on the size of the discharge hole 7a can be discharged as they are, and there is no need to crush obstacles into fine powder. This is a drilling method that can reduce digging time and labor.
第１図はこの発明工法に係る一実施例で使用す
るアースオーガ機堀削部の部分断面図、第２図は
この発明工法の模式説明図、第３図は従来法の模
式説明図である。
１…スクリユウ、２…スクリユウヘツド、４…
スクリユウスレツド、７…被覆管、７ａ…排土
孔、８…上端部、９ａ…駆動源、１１…所期堀削
場所、１２…障害地盤、１３…障害物、１４…堀
削孔壁、１５…堀削土。
Fig. 1 is a partial sectional view of the earth auger excavation part used in an embodiment of the invention, Fig. 2 is a schematic illustration of the invention, and Fig. 3 is a schematic illustration of the conventional method. . 1...Screw head, 2...Screw head, 4...
Screw thread, 7... Covering pipe, 7a... Earth removal hole, 8... Upper end, 9a... Drive source, 11... Intended excavation location, 12... Obstacle ground, 13... Obstacle, 14... Excavation hole wall, 15... Excavation of trench.
Claims (1)
する障害地盤を掘削するにあたり、スクリユウと
の間隙がスクリユウ外径の略１／30乃至１／100
に形成された中空円筒状で外周面に排土孔を設け
てその上端部を駆動源に固定した被覆管でスクリ
ユウを保護してなる掘削部を有するアースオーガ
機を用い、前記スクリユウと連絡した被覆管の外
径よりも大きい径を有するスクリユウヘツドを所
期削孔場所に打設し、このヘツドに回転を伝える
ことに依つて障害地盤を掘進するとともに障害物
との当接時にスクリユウの屈折を被覆管によつて
防止し、掘削土をスクリユウスレツドで被覆管内
部から排土孔まで導いて掘削孔壁の崩壊を防ぎつ
つ地上へ排土する、ことからなることを特徴とす
る障害地盤の直進掘削法。1 When excavating obstructed ground where rocks, reinforcing bars, steel concrete, etc. are buried, the gap between the screw and the screw is approximately 1/30 to 1/100 of the outside diameter of the screw.
An earth auger machine was used, which had an excavation section formed of a hollow cylindrical shape with an earth removal hole on its outer circumferential surface, and the screw was protected by a cladding tube whose upper end was fixed to a driving source, and communicated with the screw. A screw head with a diameter larger than the outside diameter of the cladding pipe is installed at the intended drilling location, and by transmitting rotation to this head, it is possible to dig through the obstructed ground and prevent the screw from collapsing when it comes into contact with an obstacle. An obstacle characterized by the fact that bending is prevented by a cladding pipe, and the excavated soil is guided from the inside of the cladding pipe to the soil removal hole with a screw thread, and the soil is discharged to the ground while preventing the collapse of the wall of the excavation hole. Direct excavation method of the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15404278A JPS5578786A (en) | 1978-12-12 | 1978-12-12 | Straight excavasion of troubleeridden subsoil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15404278A JPS5578786A (en) | 1978-12-12 | 1978-12-12 | Straight excavasion of troubleeridden subsoil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5578786A JPS5578786A (en) | 1980-06-13 |
| JPS626074B2 true JPS626074B2 (en) | 1987-02-07 |
Family
ID=15575641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15404278A Granted JPS5578786A (en) | 1978-12-12 | 1978-12-12 | Straight excavasion of troubleeridden subsoil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5578786A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3772876D1 (en) * | 1986-07-11 | 1991-10-17 | Corning Glass Works | LIGHT-COLORED GLASSES WITH A VARIABLE TRANSPARENCY. |
| JP2506049B2 (en) * | 1993-09-01 | 1996-06-12 | 東洋ロックソイル株式会社 | Ogre method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1376094A (en) * | 1972-02-10 | 1974-12-04 | Atlas Copco Ab | Method and apparatus for drilling |
-
1978
- 1978-12-12 JP JP15404278A patent/JPS5578786A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1376094A (en) * | 1972-02-10 | 1974-12-04 | Atlas Copco Ab | Method and apparatus for drilling |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5578786A (en) | 1980-06-13 |
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