JPS594039B2 - A device that inserts large-diameter pipes while enlarging curved small-diameter holes. - Google Patents
A device that inserts large-diameter pipes while enlarging curved small-diameter holes.Info
- Publication number
- JPS594039B2 JPS594039B2 JP15358479A JP15358479A JPS594039B2 JP S594039 B2 JPS594039 B2 JP S594039B2 JP 15358479 A JP15358479 A JP 15358479A JP 15358479 A JP15358479 A JP 15358479A JP S594039 B2 JPS594039 B2 JP S594039B2
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- pipe
- hole
- drill pipe
- support member
- 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
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】
この発明は、地盤に設けられた彎曲小径孔を拡孔しなが
ら、その孔にガス管、電カケープル、通信ケーブル等を
収容するための大径管（鞘管）またはその他の用途の大
径管を挿入する装置に関するものである。Detailed Description of the Invention This invention provides a large diameter pipe (sheath pipe) for accommodating a gas pipe, electric cable, communication cable, etc. The present invention relates to a device for inserting large diameter tubes for other uses.
従来、地中に鋼管やＰＣ管などからなる大径管を円弧状
に彎曲延長するように敷設する場合は、まず第１図に示
すように、鋼管からなる小径管２の前端部に、液圧モー
タ等の先端駆動型モータにより回転されるビット１２を
設け、かつ前記小径管２を地上に設置された推進機１３
により推進して円弧状の彎曲小径孔１を穿設し、次に第
２図に示すように、前記小径管２の後端部に拡孔用ビッ
ト３を連結すると共にその拡孔用ビット３の後端部に鋼
管やＰＣ管などからなる大径管１４を連結し、推進機１
３により大径管１４およびこれに連結された各部分を回
転しながら推進することにより、前記小径管２によりガ
イドしながら拡孔用ビット３によシ大径孔１５を掘進す
ると共に、その大径孔１５に大径管１４を挿入していく
方式および前記大径管を前記小径管と見做し、前記大径
管より更に大きい大径管を前記の方式により挿入するこ
とを必要に応じて繰返す方式が提案されている。Conventionally, when laying a large-diameter pipe made of steel pipe or PC pipe underground in a curved arc, first, as shown in Fig. 1, liquid was applied to the front end of the small-diameter pipe 2 made of steel pipe. A propulsion machine 13 is provided with a bit 12 rotated by a tip-driven motor such as a pressure motor, and the small diameter pipe 2 is installed on the ground.
to drill an arcuate curved small diameter hole 1, and then, as shown in FIG. 2, a hole expanding bit 3 is connected to the rear end of the small diameter tube 2, and A large diameter pipe 14 made of steel pipe, PC pipe, etc. is connected to the rear end of the propulsion machine 1.
3 rotates and propels the large-diameter pipe 14 and the parts connected thereto, the hole-expanding bit 3 is guided by the small-diameter pipe 2 to dig into the large-diameter hole 15, and the large-diameter hole 15 is expanded. The method of inserting the large-diameter pipe 14 into the diameter hole 15 and the method of inserting a large-diameter pipe that is larger than the large-diameter pipe by regarding the large-diameter pipe as the small-diameter pipe as necessary. A method of repeating the process has been proposed.
しかし、このようにして大径管を敷設する場合は、地中
で彎曲している大径管列を回転させるので、著しく大き
な回転力を必要とすると共に、大径管に大きな応力が生
じるという欠点がある。However, when laying large-diameter pipes in this way, the large-diameter pipe rows that are curved underground are rotated, which requires a significantly large rotational force and generates large stress on the large-diameter pipes. There are drawbacks.
この発明は、前述の欠点を排除し、彎曲小径孔に大径管
を容易にかつ大きな応力を発生させることなく挿入する
ことができる装置を提供することを目的とするものであ
る。SUMMARY OF THE INVENTION The object of the present invention is to eliminate the above-mentioned drawbacks and to provide a device that allows a large-diameter tube to be inserted into a curved small-diameter hole easily and without generating large stresses.
次にこの発明を図示の例によって詳細に説明する。Next, the present invention will be explained in detail using illustrated examples.
第３図ないし第７図はこの発明の実施例を示すものであ
って、両端部が地表に開口している円弧状の彎曲小径孔
１が前記従来の場合と同様の方法により設けられ、かつ
その彎曲小径孔１に挿入されている鋼管からなる小径管
２の後端部には、拡孔用ビット３の前部中実軸部が螺合
連結され、その拡孔用ビット３の後部中央筒部には、前
記小径管２とほぼ同程度の曲げ剛性を有する鋼管からな
るドリルパイプ５の前端部が螺合連結され、そのドリル
パイプ５の後端部且回転推進装置４により把持されて回
転され々から推進される。3 to 7 show an embodiment of the present invention, in which an arcuate curved small diameter hole 1 with both ends open to the ground surface is provided by the same method as in the conventional case, and A front solid shaft portion of a hole-expanding bit 3 is threadedly connected to the rear end of a small-diameter pipe 2 made of a steel pipe inserted into the curved small-diameter hole 1. The front end of a drill pipe 5 made of a steel pipe having approximately the same bending rigidity as the small diameter pipe 2 is threadedly connected to the cylindrical part, and the rear end of the drill pipe 5 is held by the rotary propulsion device 4. It is rotated and propelled.
止水バッキング１６を介して相互に屈曲可能に嵌合連結
さ′れている多数の中間大径管１７と前部大径管７と後
部大径管９とからなる鋼製大径管列６内に前記ドリルパ
イプ５が配置され、かつ前部大径管７の前端部に固定さ
れた前部支承部材８にドリルパイプ５の前端側部分が軸
受１８を介して回転自在に嵌合され、さらに前部支承部
材８とその前部においてドリルパイプ５に固定された支
承フランジ１９との間には前部スラスト軸受２０が介在
され、前記前部支承部材８により前部スラスト軸受２０
および支承フランジ１９を介してドリルパイプ５が後退
移動しないように支承されている。A steel large-diameter pipe array 6 consisting of a large number of intermediate large-diameter pipes 17, a front large-diameter pipe 7, and a rear large-diameter pipe 9, which are connected to each other in a bendable manner via a water-stop backing 16. The drill pipe 5 is disposed therein, and the front end portion of the drill pipe 5 is rotatably fitted to the front support member 8 fixed to the front end of the front large diameter pipe 7 via a bearing 18. Further, a front thrust bearing 20 is interposed between the front support member 8 and a support flange 19 fixed to the drill pipe 5 at the front thereof.
The drill pipe 5 is supported via a support flange 19 so as not to move backward.
拡孔用ビット３と前部支承部材８とはそれらの間にある
ドリルパイプ５の撓み変形を許容する間隔で配置され、
かつ拡孔用ビット３と前部支承部材８との間に土砂が侵
入するのを防止するだめの円筒状保護カバー２１の前端
部は拡孔用ビット３に固定され、さらにその保護カバー
２１の後端部は前部支承部材８の前端部に設けられた小
径部に回転自在に嵌設されている。The hole-expanding bit 3 and the front support member 8 are arranged at an interval that allows bending deformation of the drill pipe 5 between them,
The front end of a cylindrical protective cover 21 that prevents dirt from entering between the hole expanding bit 3 and the front support member 8 is fixed to the hole expanding bit 3, and the protective cover 21 is fixed to the hole expanding bit 3. The rear end portion is rotatably fitted into a small diameter portion provided at the front end portion of the front support member 8.
後部大径管９の後端部に着脱自在に嵌合係止された後部
支承部材１０にドリルパイプ５の後端側部分が軸受２２
を介して回転自在に嵌合され、その後部支承部材１０と
その後部においてドリルパイプ５に係止されたチャック
装置１１との間には後部スラスト軸受２３が介在され、
前記チャック装置１１は、ドリルパイプ挿通孔を有する
ケーシング２４と、ケーシング２４内でドリルパイプ５
の周りに配置された複数の把持片２５と、ケーシング２
４に螺合された把持片緊締用ボルト２６とにより構成さ
れている。The rear end portion of the drill pipe 5 is attached to a bearing 22 on the rear support member 10 which is removably fitted and locked to the rear end of the rear large diameter pipe 9.
A rear thrust bearing 23 is interposed between the rear support member 10 and the chuck device 11 which is locked to the drill pipe 5 at the rear thereof.
The chuck device 11 includes a casing 24 having a drill pipe insertion hole, and a drill pipe 5 inside the casing 24.
a plurality of gripping pieces 25 arranged around the casing 2;
4 and a gripping piece tightening bolt 26 screwed together.
またドリルパイプ５の中間部に回転自在に取付けられた
中間支承部材２７は中間大径管１７内に嵌挿されている
。Further, an intermediate support member 27 rotatably attached to the intermediate portion of the drill pipe 5 is fitted into the intermediate large diameter pipe 17.
前記回転推進装置４によりドリルパイプ５を回転しなが
ら推進すると、そのドリルパイプ５により拡孔用ビット
３、小径管２および保護カバー２１が回転され、かつ推
力（六 ドリルパイプ５の後端側部分からチャック装置
１１、後部スラスト軸受２３、後部支承部材１０を経て
大径−管列６に伝達さへ次いでその大径管列６の前端部
から前部支承部材８、前部スラスト軸受２０、支承フラ
ンジ１９を経てドリルパイプ５の前端側部分、拡孔用ビ
ット３および小径管２等に伝達される。When the rotary propulsion device 4 rotates and propels the drill pipe 5, the drill pipe 5 rotates the hole expanding bit 3, the small diameter pipe 2, and the protective cover 21. The transmission is then transmitted from the front end of the large-diameter tube row 6 to the front support member 8, the front thrust bearing 20, and the support via the chuck device 11, the rear thrust bearing 23, and the rear support member 10. It is transmitted to the front end portion of the drill pipe 5, the hole expanding bit 3, the small diameter pipe 2, etc. via the flange 19.
ベントナイト泥水等の孔壁安定用泥水は、ポンプにより
スイベルジヨイントを介してドリルパイプ５の後端部に
供給され、かつその泥水は、ドリルパイプ５を通って拡
孔用ビット３の給水孔２８から噴射されたのち、拡孔用
ビット３により掘削された土砂を伴って大径孔１５と保
護カバー２１および大径管列６との間を流動し孔外に排
出される。The muddy water for stabilizing the hole wall, such as bentonite muddy water, is supplied by a pump to the rear end of the drill pipe 5 through the swivel joint, and the muddy water passes through the drill pipe 5 to the water supply hole 28 of the hole expanding bit 3. After being injected from the hole, it flows between the large-diameter hole 15, the protective cover 21, and the large-diameter tube row 6, and is discharged from the hole together with the earth and sand excavated by the hole-expanding bit 3.
この発明を実施する場合、小径管２の後端部と拡孔用ビ
ット３との間に回転継手を設けて、小径管２を回転させ
ないでドリルパイプ５ 拡孔用ビット３および保護カバ
ー２１等を回転してもよく、まだ大径管相互の屈曲可能
な継手としては図示以外の任意構造のものを採用しても
よい。When carrying out this invention, a rotary joint is provided between the rear end of the small diameter pipe 2 and the hole expanding bit 3, and the drill pipe 5, the hole expanding bit 3, the protective cover 21, etc. are provided without rotating the small diameter pipe 2. It is also possible to rotate the large-diameter pipes, and any structure other than that shown in the drawings may be used as a joint that can bend the large-diameter pipes together.
この発明によれば、大径管列６が相互に屈曲可能に連結
された多数の中間大径管１７、前部大径管７および後部
大径管９により構成されると共に、その大径管列６が回
転されることなく推進されるので、彎曲状態で推進され
る大径管列６に大きな応力が発生するのを防止すること
ができ、かつ彎曲した大径管列を回転させ々がら拡孔推
進する従来の場合に比べて回転力が著しく小さくて済み
、さらに推進力はドリルパイプ５の後端側部分から耐推
進力強度の大きい大径管列６を経てドリルパイプ５の前
端側部分に伝達されるので、小径の長いドリルパイプの
中間部に大きな推進力が作用することはなく、そのため
推進距離が長い場合でもドリルパイプの座屈を防止でき
る等の効果が得られる。According to this invention, the large-diameter tube row 6 is constituted by a large number of intermediate large-diameter tubes 17, a front large-diameter tube 7, and a rear large-diameter tube 9 that are bendably connected to each other, and the large-diameter tubes Since the row 6 is propelled without being rotated, it is possible to prevent large stress from being generated in the large diameter tube row 6 that is propelled in a curved state, and it is possible to prevent the row 6 of large diameter tubes from being rotated while being curved. The rotational force is significantly smaller than in the conventional case of hole expansion propulsion, and furthermore, the propulsion force is transferred from the rear end of the drill pipe 5 to the front end of the drill pipe 5 through the large-diameter tube array 6 that has high thrust resistance. Since the propulsion force is transmitted to the intermediate portion of the small-diameter long drill pipe, a large propulsion force does not act on the middle portion of the long drill pipe. Therefore, even when the propulsion distance is long, the buckling of the drill pipe can be prevented, and other effects can be obtained.
第１図は彎曲小径孔を穿設した状態を示す縦断側面図、
第２図は従来の装置により彎曲小径孔を拡孔しつつ大径
管を挿入している状態を示す縦断側面図である。
第３図ないし第７図はこの発明の実施例を示すものであ
って、第３図はこの発明の装置により彎曲小径孔を拡孔
しつつ大径管を挿入している状態を示す縦断側面図、第
４図はこの発明の装置を示す一部切欠概略縦断側面図、
第５図はこの発明の装置の前部を示す拡大縦断側面図、
第６図は大径列の一部を示す縦断側面図、第７図はこの
発明の装置の後部を示す拡大縦断側面図である。
図において、１は彎曲小径孔、２は小径管、３は拡孔用
ビット、４は回転推進装置、５はドリルパイプ、６は大
径管列、７は前部大径管、８は前部支承部材、９は後部
大径管、１０は後部支承部材、１１はチャック装置、１
２はビット、１５は大径孔、１６は止水バッキング、１
７は中間大径管、１８は軸受、２０は前部スラスト軸受
、２１は円筒状保護カバー、２３は後部スラスト軸受、
２５は把持片、２６は把持片緊締用ボルト、２７は中間
支承部材である。Figure 1 is a longitudinal side view showing the state in which a curved small diameter hole is drilled;
FIG. 2 is a longitudinal sectional side view showing a state in which a large diameter pipe is inserted while enlarging a curved small diameter hole using a conventional device. 3 to 7 show an embodiment of the present invention, and FIG. 3 is a longitudinal side view showing a state in which a large diameter pipe is inserted while enlarging a curved small diameter hole using the apparatus of this invention. Figure 4 is a partially cutaway schematic vertical sectional side view showing the device of the present invention;
FIG. 5 is an enlarged longitudinal sectional side view showing the front part of the device of the present invention;
FIG. 6 is a longitudinal side view showing a part of the large-diameter row, and FIG. 7 is an enlarged longitudinal side view showing the rear part of the device of the present invention. In the figure, 1 is a curved small diameter hole, 2 is a small diameter pipe, 3 is a hole expansion bit, 4 is a rotary propulsion device, 5 is a drill pipe, 6 is a large diameter pipe row, 7 is a front large diameter pipe, 8 is a front 9 is a rear large diameter pipe, 10 is a rear support member, 11 is a chuck device, 1
2 is a bit, 15 is a large diameter hole, 16 is a water stop backing, 1
7 is an intermediate large diameter pipe, 18 is a bearing, 20 is a front thrust bearing, 21 is a cylindrical protective cover, 23 is a rear thrust bearing,
25 is a gripping piece, 26 is a bolt for tightening the gripping piece, and 27 is an intermediate support member.
Claims (1)
拡孔用ビット３と後端部が回転推進装置４によシ把持さ
れて回転推進されるドリルパイプ１の前端部とが順次連
結され、相互に屈曲可能に連結された多数の大径管から
なる大径管列６における前部大径管７に取付けられた前
部支承部材８に、前記ドリルパイプ５の前端側部分が回
転自在にかつ後退移動しないように嵌合され、前記大径
管列６における後部大径管９に嵌合係止された後部支承
部材１０にドリルパイプ５が回転自在に嵌合され、その
後部支承部材１０の後部においてドリルパイプ５に係止
されたチャック装置１１は後部支承部材１０に回転自在
に係合されていることを特徴とする彎曲小径孔を拡孔し
つつ大径管を挿入する装置。1 At the rear end of the small diameter pipe 2 that is inserted into the curved small diameter hole 1,
The hole-expanding bit 3 and the front end of the drill pipe 1, whose rear end is gripped by a rotary propulsion device 4 and is rotatably propelled, are sequentially connected, and the drill pipe 1 is connected in sequence to form a large number of large diameter pipes connected to each other so as to be bendable. The front end side portion of the drill pipe 5 is fitted into the front support member 8 attached to the front large diameter pipe 7 in the large diameter pipe array 6 so as to be rotatable and not move backward. A drill pipe 5 is rotatably fitted to a rear support member 10 that is fitted and locked to a rear large diameter pipe 9 in row 6, and a chuck device 11 is locked to the drill pipe 5 at the rear of the rear support member 10. A device for inserting a large diameter pipe while enlarging a curved small diameter hole, characterized in that the device is rotatably engaged with the rear support member 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15358479A JPS594039B2 (en) | 1979-11-29 | 1979-11-29 | A device that inserts large-diameter pipes while enlarging curved small-diameter holes. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15358479A JPS594039B2 (en) | 1979-11-29 | 1979-11-29 | A device that inserts large-diameter pipes while enlarging curved small-diameter holes. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5677498A JPS5677498A (en) | 1981-06-25 |
| JPS594039B2 true JPS594039B2 (en) | 1984-01-27 |
Family
ID=15565676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15358479A Expired JPS594039B2 (en) | 1979-11-29 | 1979-11-29 | A device that inserts large-diameter pipes while enlarging curved small-diameter holes. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS594039B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62166547U (en) * | 1986-04-10 | 1987-10-22 | ||
| JPS63175253U (en) * | 1986-11-10 | 1988-11-14 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02190597A (en) * | 1989-01-19 | 1990-07-26 | Tone Boring Co | Track diameter enlarging apparatus |
| KR100893055B1 (en) * | 2004-08-09 | 2009-04-15 | 현대중공업 주식회사 | A skidshoe for a movement of a block and shipment |
-
1979
- 1979-11-29 JP JP15358479A patent/JPS594039B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62166547U (en) * | 1986-04-10 | 1987-10-22 | ||
| JPS63175253U (en) * | 1986-11-10 | 1988-11-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5677498A (en) | 1981-06-25 |
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