JP3468700B2 - Ground drilling material and drainage method using it - Google Patents
Ground drilling material and drainage method using itInfo
- Publication number
- JP3468700B2 JP3468700B2 JP25242898A JP25242898A JP3468700B2 JP 3468700 B2 JP3468700 B2 JP 3468700B2 JP 25242898 A JP25242898 A JP 25242898A JP 25242898 A JP25242898 A JP 25242898A JP 3468700 B2 JP3468700 B2 JP 3468700B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- sheath
- drilling
- rod
- ground
- 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 - Fee Related
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Earth Drilling (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、地山削孔用資材及
びそれを用いた水抜き工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground drilling material and a draining method using the material.
【０００２】[0002]
【従来の技術】従来より、地山削孔用資材として、例え
ば実公平７−４３２６４号公報に開示されるように、中
空孔を有するロッドを鞘管内に挿入し、このロッド及び
鞘管を各々複数本ずつ連結して長尺にして使用し、最先
端のロッド及び鞘管の先端にそれぞれ削孔用ビットを取
り付け、この両ビットを回転させながら打撃力を加え、
更にロッドの中空孔を通して水を噴出することで削孔を
行うようにしたものは知られている。尚、削孔に用いた
水は、スライムと共に鞘管とロッドとの間の空間内を通
して排水される。また、最先端のロッドの先端にのみ削
孔用ビットを取り付けて削孔を行うものも知られてい
る。2. Description of the Related Art Conventionally, as a material for ground drilling, for example, as disclosed in Japanese Utility Model Publication No. 7-43264, a rod having a hollow hole is inserted into a sheath tube, and the rod and the sheath tube are respectively inserted. Multiple pieces are connected and used in a long length, and bites for drilling are attached to the tip of the most advanced rod and sheath tube respectively, and striking force is applied while rotating both bits,
Further, it is known that a hole is drilled by ejecting water through the hollow hole of the rod. The water used for drilling is discharged together with slime through the space between the sheath tube and the rod. Further, there is also known one in which a drill bit is attached only to the tip of the most advanced rod for drilling.
【０００３】そして、上記資材を用いて地山の水抜きを
行う場合には、通常、予め資材の鞘管に複数の水抜き孔
を設けておき、その資材を用いて地山に削孔をした後、
鞘管内よりロッドを引き抜いて回収し、削孔内に残され
た鞘管内を通して水抜きを行っている。また、例えば特
開平５−１８７１８５号公報に開示されるように、上記
資材を用いて削孔をした後、その削孔内から資材のロッ
ド及び鞘管を共に引き抜いて回収し、次に、先端部に複
数の小孔を有する水抜きパイプを削孔内に挿入して水抜
きを行うことも知られている。When water is removed from the ground using the above materials, usually, a plurality of water drain holes are provided in advance in the sheath pipe of the material, and the materials are used to drill holes in the ground. After doing
The rod is pulled out from the sheath pipe and collected, and water is drained through the sheath pipe left in the drilled hole. Further, as disclosed in, for example, Japanese Patent Application Laid-Open No. 5-187185, after the material is drilled, the rod and the sheath pipe of the material are both pulled out from the hole and collected, and then the tip is cut. It is also known to insert a drainage pipe having a plurality of small holes in its part into the drilled hole to drain water.
【０００４】[0004]
【発明が解決しようとする課題】ところで、トンネルの
掘削切羽からその前方の地山の水抜きを行う場合には、
上記例示の公報（特開平５−１８７１８５号公報）にも
開示するように、切羽前方のトンネル掘削領域外に向け
て斜めに削孔を行い、その掘削領域外で地山の水抜きを
行っているのが一般的である。これは、掘削領域内で削
孔及び水抜きを行えば水抜き作業終了後等に削孔内から
金属製の鞘管及び水抜きパイプを引き抜いて回収し、そ
の後に行うトンネル掘削に支障を来たさないようにする
必要があり、鞘管の引き抜き作業などに手間と時間等が
かかるからである。しかし、トンネル掘削に先立って切
羽前方の地山の水抜きを行う意義からすれば掘削領域内
で地山の水抜きを行うことが望ましく、またそのことを
専用機を用いることなく簡易に行い得るツールの提供が
要請されている。By the way, when water is drained from the excavated face of a tunnel to the ground in front of it,
As disclosed in the above-mentioned publication (Japanese Patent Laid-Open No. 5-187185), a hole is diagonally drilled toward the outside of the tunnel excavation area in front of the face, and the ground is drained outside the excavation area. It is common to have This is because if drilling and draining are performed within the excavation area, the metal sheath pipe and drainage pipe are pulled out from the drilled hole and collected after the completion of draining work, which interferes with subsequent tunnel excavation. It is necessary not to do this, and it takes time and labor to pull out the sheath tube. However, it is desirable to drain the ground in front of the facet before excavating the tunnel, and it is desirable to drain the ground in the excavation area, and this can be done easily without using a dedicated machine. Tools are required to be provided.
【０００５】本発明はかかる点に鑑みてなされたもので
あり、その課題とするところは、地山削孔用資材の鞘管
を改良することにより、トンネルの切羽前方の掘削領域
内で地山の水抜きを専用機を用いることなく簡易かつ迅
速に行い得る地山削孔用資材及びそれを用いた水抜き工
法を提供するものである。The present invention has been made in view of the above problems, and an object thereof is to improve a sheath pipe of a material for ground drilling to improve the ground in the excavation region in front of the face of a tunnel. The present invention provides a material for ground drilling capable of easily and quickly removing water without using a dedicated machine, and a water removing method using the material.
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するた
め、請求項１に係る発明は、中空孔を有するロッドを鞘
管内に挿入し、このロッド及び鞘管を各々複数本ずつ連
結して長尺にしたもので、少なくとも最先端のロッドの
先端に削孔用ビットを取り付け、このビットを回転させ
ながら打撃力を加え、更にロッドの中空孔を通して水を
噴出することで地山に削孔をする地山削孔用資材におい
て、上記複数本の鞘管を、その継手部を鋼鉄製とした部
分を除いて合成樹脂管で構成する。In order to solve the above-mentioned problems, the invention according to claim 1 is to insert a rod having a hollow hole into a sheath pipe and connect a plurality of rods and a plurality of sheath pipes. It is a long one, and at least the tip of the most advanced rod is equipped with a drilling bit, and while striking force while rotating this bit, water is jetted through the hollow hole of the rod to drill a hole in the ground. In the material for ground drilling, the plurality of sheath pipes whose joints are made of steel
Except for the parts , it is made of synthetic resin tube.
【０００７】請求項２に係る発明は、最先端の鞘管であ
る先導管に、上記ロッド側の削孔用ビットとは別の鞘管
側の削孔用ビットを回転自在に取り付け、この削孔用ビ
ットに最先端のロッドから回転力及び打撃力を付与して
削孔を行うものの場合、その先導管を従来通り金属管で
構成し、それ以外の鞘管を合成樹脂管で構成する。According to the second aspect of the present invention, a drill bit on the sheath tube side, which is different from the drill bit on the rod side, is rotatably attached to the leading conduit which is the most advanced sheath tube. In the case of drilling holes by applying rotational force and striking force from the most advanced rod to the hole bit, the leading pipe is made of metal pipe as usual, and the other sheath pipe is made of synthetic resin pipe.
【０００８】そして、請求項３に係る発明は、請求項１
又は２記載の地山削孔用資材を用いてトンネルの切羽前
方の掘削領域内で地山の水抜きを行う水抜き工法とし
て、上記資材を用いて地山に削孔をした後、ロッドを鞘
管内より引き抜いて回収し、削孔内に残された鞘管内を
通して水抜きを行い、水抜き作業終了後も、複数の水抜
き用小孔を有する鞘管を削孔内に残す構成とする。The invention according to claim 3 provides the invention according to claim 1.
Alternatively, as a water draining method for draining the ground in the excavation area in front of the face of a tunnel using the material for ground drilling described in 2, a rod is prepared after drilling the ground using the above material. recovered and pulled out from the sheath tube, it performs a water drain through the sheath tube left in the drilling, even after the drainage work is completed, a plurality of draining
A sheath tube having a small hole for use is left inside the drilled hole .
【０００９】このような構成では、水抜き作業終了後削
孔内に残された鞘管は、その継手部を鋼鉄製とした部分
を除いて合成樹脂管からなるため、削孔ないし鞘管がト
ンネルの切羽前方の掘削領域内にある場合にはトンネル
の掘削時に油圧ブレーカ等の掘削機械により鞘管が切羽
と一緒に掘削されることになり、掘削機械に損傷を与え
るなど掘削作業に支障を来たすことはない。その上、複
数の水抜き用小孔を有する鞘管を削孔内から引き抜くこ
とが必要ではなく、大型の水抜き専用機を用いることな
く、一般のトンネル作業者がドリルジャンボ等の削孔機
械を用いて水抜き作業を簡易かつ迅速に行うことができ
る。With such a construction, since the sheath pipe left in the drilled hole after completion of the water draining operation is made of a synthetic resin pipe except for the portion whose joint is made of steel , the drilled hole is drilled. Or, if the sheath pipe is within the excavation area in front of the face of the tunnel, the sheath pipe will be excavated together with the face by the excavating machine such as a hydraulic breaker when excavating the tunnel. It does not hinder the work. Moreover, the double
It is not necessary to pull out the sheath tube with several small holes for draining from the inside of the hole, and general tunnel operators can use a drilling machine such as a drill jumbo without using a large machine for water removal. Draining work can be performed easily and quickly.
【００１０】また、最先端の鞘管である先導管にも削孔
用ビットを取り付けるものの場合、その先導管は合成樹
脂管ではなく、従来通り金属管からなるので、削孔自体
に支障を来たすこともない。Further, in the case where the drilling bit is also attached to the leading pipe which is the most advanced sheath pipe, the leading pipe is not a synthetic resin pipe but a metal pipe as in the conventional case, which causes a trouble in the drilling itself. Nothing.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。図１は本発明の一実施形態に係る
地山削孔用資材を分解した状態を示し、この地山削孔用
資材は、図１（ａ）に示す鞘管１と、図１（ｂ）に示す
インナロッド２とを有し、地山に削孔を行うときには鞘
管１内にインナロッド２を挿入して使用される。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a state in which a material for ground drilling according to an embodiment of the present invention is disassembled. The material for ground drilling includes a sheath pipe 1 shown in FIG. 1 (a) and FIG. 1 (b). The inner rod 2 shown in FIG. 2 is used, and the inner rod 2 is inserted into the sheath pipe 1 when the natural ground is drilled.
【００１２】上記鞘管１は、最先端の先導管１１と、複
数本の中継管１２，１２，…と、最後端の端末管１３と
を削孔の進捗状況に応じて順次連結するものである。先
導管１１は鋼鉄等の金属からなり、その先端部内には取
付ピース１６が嵌め込んで固定され、この取付ピース１
６の先導管１１外に突出する部分の外周にはロックリン
グ１７を介して削孔用ビットとしての拡径ビット１８が
回転自在に装着されている。中継管１２及び端末管１３
は共にポリエチレン樹脂、耐衝撃性硬質塩化ビニル樹
脂、ＦＲＰ等の合成樹脂製の管からなり、この中継管１
２の両端及び端末管１３の一端にはそれぞれねじ部（雄
ねじ又は雌ねじ）を有する鋼鉄製の管継手１９ａ又は１
９ｂが接続され、この管継手１９ａ，１９ｂを介して中
継管１２，１２同士又は中継管１２と先導管１１若しく
は端末管１３とが連結されるようになっている。中継管
１２及び端末管１３の長さは約３ｍであり、中継管１２
は、鞘管１の全長が最大約３０ｍの範囲内で複数本連結
して使用される。The above-mentioned sheath pipe 1 is formed by sequentially connecting the most advanced tip conduit 11, a plurality of relay pipes 12, 12, ... And the rearmost end pipe 13 in accordance with the progress of drilling. is there. The tip conduit 11 is made of metal such as steel, and a mounting piece 16 is fitted and fixed in the tip of the tip conduit 11.
A diameter-increasing bit 18 serving as a drilling bit is rotatably mounted on the outer periphery of the portion of 6 which projects outside the front conduit 11 via a lock ring 17. Relay tube 12 and terminal tube 13
Are both made of polyethylene resin, impact-resistant hard vinyl chloride resin, synthetic resin pipes such as FRP.
Steel pipe joints 19a or 1 having threaded portions (male thread or female thread) at both ends of 2 and one end of the terminal pipe 13, respectively.
9b are connected, and the relay pipes 12 and 12 or the relay pipe 12 and the front conduit 11 or the terminal pipe 13 are connected via the pipe joints 19a and 19b. The length of the relay pipe 12 and the terminal pipe 13 is about 3 m.
Are used by connecting a plurality of sheath tubes 1 within a maximum length of about 30 m.
【００１３】また、上記先導管１１は、取付ピース１６
の嵌め込み側（ひいては拡径ビット１８の取付側）であ
る先端側１１ａの外径が後端側１１ｂのそれよりも大き
い先端拡径状に形成されており、中継管１２及び端末管
１３の外径は、この先導管１１の先端側１１ａの外径よ
りも小さく後端側１１ｂの外径と略同一に設定され、具
体的には約９０ｍｍである。先導管１１の後端側１１
ｂ、中継管１２及び端末管１３には、図示していない
が、それぞれ複数の水抜き用の小孔が長さ方向に所定間
隔毎に設けられている。The leading conduit 11 is provided with a mounting piece 16
The outer diameter of the front end side 11a, which is the fitting side (and by extension, the mounting side of the expanded diameter bit 18), is larger than that of the rear end side 11b, and the outside of the relay pipe 12 and the terminal pipe 13 is formed. The diameter is set to be smaller than the outer diameter of the front end side 11a of the front conduit 11 and substantially the same as the outer diameter of the rear end side 11b, and specifically about 90 mm. Rear end side 11 of the front conduit 11
Although not shown, each of the b, the relay pipe 12, and the terminal pipe 13 is provided with a plurality of small holes for draining water at predetermined intervals in the longitudinal direction.
【００１４】上記中継管１２（又は端末管１３）と管継
手１９ａ（又は１９ｂ）との接続部分の構造は図２に拡
大詳示する。すなわち、管継手１９ａの接続側端部外周
面には予め開口側に向かって内周面寄りに傾斜する三段
状のテーパー面３１とこのテーパー面３１の管継手中央
側に連続しかつテーパー面３１の管継手中央側より一段
低い環状の段部３２とが形成されている。また、中継管
１２の端部内周面にも予め開口側に向かって外周面寄り
に傾斜するテーパー面３６が形成されている。そして、
中継管１２の端部外周に所定の長さ（中継管１２の圧入
長さに略等しい長さ）を有する薄肉（約０．８ｍｍ）円
筒状のステンレスカラー３７を密着状態で嵌め込んだ
後、この中継管１２の端部を、ステンレスカラー３７を
弾性変形させながら上記管継手１９ａの接続側端部外周
面上に圧入し、圧入完了段階でステンレスカラー３７の
弾性復元力により中継管１２のテーパー面３６形成部が
管継手１９ａの段部３２に接するように変形させること
によって、中継管１２と管継手１９ａとが抜け止め状態
に強固に接続されている。尚、図２中、３３は管継手１
９ａの中継管圧入側と反対側端部に形成されたねじ部
（外周面側の雄ねじ又は内周面側の雌ねじ）である。The structure of the connecting portion between the relay pipe 12 (or the terminal pipe 13) and the pipe joint 19a (or 19b) is shown in detail in FIG. That is, on the outer peripheral surface of the connection side end of the pipe joint 19a, a three-step tapered surface 31 which is inclined inward toward the inner peripheral surface toward the opening side in advance, and the tapered surface 31 is continuous with the tapered central surface of the pipe joint and is a tapered surface. An annular step portion 32 that is one step lower than the center side of the pipe joint 31 is formed. In addition, a taper surface 36 that is inclined toward the outer peripheral surface toward the opening side is also formed in advance on the inner peripheral surface of the end portion of the relay pipe 12. And
After a thin (about 0.8 mm) cylindrical stainless steel collar 37 having a predetermined length (a length approximately equal to the press-fit length of the relay pipe 12) is closely fitted to the outer circumference of the end portion of the relay pipe 12, The end portion of the relay pipe 12 is press-fitted onto the outer peripheral surface of the connection side end of the pipe joint 19a while elastically deforming the stainless steel collar 37, and at the completion of press-fitting, the elastic restoring force of the stainless steel collar 37 causes the taper of the relay pipe 12. By deforming the portion where the surface 36 is formed so as to contact the step portion 32 of the pipe joint 19a, the relay pipe 12 and the pipe joint 19a are firmly connected in a retaining state. In FIG. 2, 33 is the pipe joint 1
9a is a threaded portion (a male thread on the outer peripheral surface side or a female thread on the inner peripheral surface side) formed at the end portion on the side opposite to the relay pipe press-fitting side.
【００１５】一方、上記インナロッド２は、最先端のロ
ッドであるステム２１と、このステム２１の後端に連結
された調整ロッド２２と、複数本の連結ロッド２３，２
３，…とからなり、これらのロッド２１〜２３は、いず
れも鋼鉄等の金属製で中心線上に中空孔２５を有してい
る。また、これらのロッド２１〜２３同士の連結には２
種類のスリーブ２６，２７が用いられており、一方のス
リーブ２６は、単にロッド同士を連結するに過ぎないの
に対し、他方のスリーブ２７は、ロッド同士の連結以外
に、ロッドを鞘管１（中継管１２）内で同心状に保持す
るガイド機能を有している。On the other hand, the inner rod 2 includes a stem 21 which is the most advanced rod, an adjusting rod 22 connected to the rear end of the stem 21, and a plurality of connecting rods 23, 2.
3, rods 21 to 23 are all made of metal such as steel and have a hollow hole 25 on the center line. Further, it is necessary to connect the rods 21 to 23 to each other by 2
Type and the sleeve 26, 27 are used, one of the sleeve 26 simply while only connecting rod to each other, the other of the sleeve 27, in addition to connecting between the rod sheath pipe rod 1 ( It has a guide function of concentrically holding it in the relay tube 12).
【００１６】上記ステム２１は、鞘管１の先導管１１内
から取付ピース１６及び拡径ビット１８を貫通して外部
にまで延出しており、その延出部である先端部には削孔
用ビットとしてのパイロットビット２８が回転一体に装
着されている。この部分の構造は、図３及び図４に拡大
詳示する。The stem 21 extends from the inside of the tip conduit 11 of the sheath tube 1 to the outside through the mounting piece 16 and the diameter-enlarging bit 18, and the tip end, which is the extending portion, is for drilling. A pilot bit 28 as a bit is mounted integrally with the rotation. The structure of this portion will be described in detail in detail in FIGS.
【００１７】すなわち、ステム２１は、図５及び図６に
も示すように、その軸方向中心線Ｌを含む面（図５で図
面に垂直な面）を対称面として前後対称に形成されてい
て、前後を反対にして使用できるようになっているとと
もに、中央線Ｌ付近から両端に行くに従って外径が３段
階で次第に小さくなり（図１では簡略化のために外径が
２段階でのみ変化する）、外径の異なる４つの部分つま
り大径部２１ａ、第１中径部２１ｂ、第２中径部２１ｃ
及び小径部２１ｄからなる。このステム２１の中心線Ｌ
付近の大径部２１ａ及びこれに連続する第１中径部２１
ｂは、取付ピース１６内に相対回転自在に嵌め込まれて
いる。大径部２１ａと第１中径部２１ｂとの段差面２１
ｅはテーパー面状に形成され、この段差面２１ｅに対応
して取付ピース１６の内周面に形成されたテーパー面１
６との間で打撃部を構成するようになっている。That is, as shown in FIGS. 5 and 6, the stem 21 is formed symmetrically with respect to the plane including the axial center line L (plane perpendicular to the drawing in FIG. 5) as a plane of symmetry. , It can be used with the front and back reversed, and the outer diameter gradually decreases in three steps from the vicinity of the center line L to both ends (in FIG. 1, the outer diameter changes only in two steps for simplification). 4) having different outer diameters, that is, the large diameter portion 21a, the first medium diameter portion 21b, and the second medium diameter portion 21c.
And a small diameter portion 21d. Center line L of this stem 21
Large diameter portion 21a in the vicinity and the first medium diameter portion 21 continuous with the large diameter portion 21a
b is fitted in the mounting piece 16 so as to be relatively rotatable. Step surface 21 between the large diameter portion 21a and the first medium diameter portion 21b
e is formed in a tapered surface shape, and the tapered surface 1 formed on the inner peripheral surface of the mounting piece 16 corresponding to the step surface 21e.
The striking portion is formed between the striking portion 6 and the striking portion 6.
【００１８】また、上記ステム２１の外周面にはその軸
方向前後二つの第２中径部２１ｃ（前側のみ図示）間に
跨って延びる３つの排水溝４１，４１，４１が円周方向
に略等間隔に形成されているとともに、ステム２１の第
２中径部２１ｃの外周面には半径方向に突出するハイス
材からなる３つの突出部４２，４２，４２が円周方向に
略等間隔でかつ軸方向に見て上記各排水溝４１の一側壁
側に位置して設けられている。一方、このステム２１の
第２中径部２１ｃが貫通する拡径ビット１８の貫通孔４
４の周縁には、図７にも示すように、上記突出部４２に
対応して３つの切欠き部４５，４５，４５が形成され、
この各切欠き部４５に対し突出部４２が貫通しかつ回転
方向に係合してステム２１から拡径ビット１８に回転力
が伝達され、拡径ビット１８が取付ピース１６を中心に
回転するようになっている。各切欠き部４５は、円周方
向の幅寸法が突出部４２の厚み寸法の２倍以上に設定さ
れていて、ステム２１を拡径ビット１８の貫通孔４４に
挿入するときに各突出部４２が切欠き部４５に嵌まり込
み易くなっている。また、この切欠き部４５と突出部４
２との円周方向の隙間は排水路として利用される。Further, on the outer peripheral surface of the stem 21, three drainage grooves 41, 41, 41 extending in the axial direction and extending between the two second intermediate diameter portions 21c (only the front side is shown) are substantially circumferentially formed. The protrusions 42, 42, 42, which are formed at equal intervals and which are made of HSS material and protrude in the radial direction, are formed on the outer peripheral surface of the second medium diameter portion 21c of the stem 21 at substantially equal intervals in the circumferential direction. In addition, it is provided at the side wall side of each drainage groove 41 as viewed in the axial direction. On the other hand, the through hole 4 of the enlarged diameter bit 18 through which the second medium diameter portion 21c of the stem 21 penetrates
As shown in FIG. 7, three notches 45, 45, 45 are formed on the peripheral edge of 4 in correspondence with the protrusions 42.
The protrusion 42 penetrates through each of the notches 45 and engages in the rotational direction so that the rotational force is transmitted from the stem 21 to the diameter-expanding bit 18, so that the diameter-expanding bit 18 rotates about the mounting piece 16. It has become. The width dimension of each notch portion 45 in the circumferential direction is set to be twice or more the thickness dimension of the protrusion portion 42, and each protrusion portion 42 is inserted when the stem 21 is inserted into the through hole 44 of the diameter expansion bit 18. Is easily fitted into the cutout portion 45. In addition, the notch portion 45 and the protruding portion 4
The gap in the circumferential direction with 2 is used as a drainage channel.
【００１９】さらに、拡径ビット１８の貫通孔４４より
前方に突出するステム２１の小径部２１ｄの外周面に
は、削孔時のステム２１の回転方向と同じ左回りでかつ
ピッチの大きいねじ部としての雄ねじ４７が形成され、
この雄ねじ４７によりパイロットビット２８が螺合して
装着される。このパイロットビット２８は、拡径ビット
１８の貫通孔４４及び切欠き部４５を通して引き抜き可
能な大きさに形成されている。Further, on the outer peripheral surface of the small diameter portion 21d of the stem 21 projecting forward from the through hole 44 of the diameter expanding bit 18, a screw portion having the same counterclockwise direction as the rotation direction of the stem 21 at the time of drilling and having a large pitch. Is formed as a male screw 47,
The pilot bit 28 is screwed and mounted by the male screw 47. The pilot bit 28 is formed in such a size that it can be pulled out through the through hole 44 and the cutout portion 45 of the expanded diameter bit 18.
【００２０】次に、上記地山削孔用資材を用いた水抜き
工法について、図８に示すトンネルの掘削切羽５０の前
方で掘削領域内に対し地山の水抜きを行う場合を例に説
明する。尚、図８中、５１は削孔機械（例えば油圧ドリ
ルジャンボ等）のガイドセル、５２はそのガイドセル５
１の先端部に取り付けられた先端ガイド、５３はガイド
セル５１上にスライド台５４を介してガイドセル５１に
沿って移動可能に設けられた回転打撃装置である。Next, the water draining method using the above-mentioned ground drilling material will be explained by taking as an example the case of draining the ground water in the excavation area in front of the excavation face 50 of the tunnel shown in FIG. To do. In FIG. 8, 51 is a guide cell for a drilling machine (for example, hydraulic drill jumbo), and 52 is a guide cell 5 for the guide cell.
Reference numeral 53 is a tip guide attached to the tip portion of the first reference numeral 1, and reference numeral 53 is a rotary striking device provided on the guide cell 51 via a slide base 54 so as to be movable along the guide cell 51.
【００２１】先ず、地山削孔用資材の鞘管１及びインナ
ロッド２を先端側のものから順次ガイドセル５１の先端
ガイド５２と回転打撃装置５３との間に装着し、回転打
撃装置５３から回転力及び打撃力を共にインナロッド２
を介して資材先端側のパイロットビット２８及び拡径ビ
ット１８に伝達し、この両ビット１８，２８の回転と両
ビット１８，２８からの打撃力の付与とに加えて、イン
ナロッド２の中空孔２５を通して水を噴出することによ
って掘削切羽５０の前方に対し削孔５６を行う。尚、削
孔に用いた水は、スライムと共に鞘管１とインナロッド
２との間の空間内を通して排水される。First, the sheath pipe 1 and the inner rod 2 of the ground drilling material are sequentially mounted from the tip end side between the tip guide 52 of the guide cell 51 and the rotary striking device 53, and then the rotary striking device 53. Rotating force and striking force both inner rod 2
To the pilot bit 28 and the diameter-expanding bit 18 on the material front side through the rotation of both bits 18 and 28 and the imparting of a striking force from both bits 18 and 28, as well as the hollow hole of the inner rod 2. A hole 56 is drilled in front of the excavation face 50 by ejecting water through 25. The water used for drilling is discharged together with the slime through the space between the sheath tube 1 and the inner rod 2.
【００２２】削孔５６を所定長さに亘って行った後、イ
ンナロッド２をその先端側のパイロットビット２８と共
に鞘管１内より引き抜いて回収する。そして、鞘管１を
その先端側の拡径ビット１８と共に削孔５６内に残した
状態で地山の水を、自然圧によりあるいは真空ポンプ等
を利用して鞘管１の水抜き用小孔より鞘管１内を通して
トンネル側に排水することで水抜きを行う。この水抜き
作業終了後も鞘管１及び拡径ビット１８を削孔５６内に
残す。After the hole 56 has been drilled for a predetermined length, the inner rod 2 and the pilot bit 28 on the tip side thereof are pulled out from the inside of the sheath tube 1 and collected. Then, with the sheath pipe 1 left in the drilled hole 56 together with the diameter-expanding bit 18 on the tip side thereof, the natural water is used to remove the natural water or a small hole for draining the sheath pipe 1 using a vacuum pump or the like. The water is drained by draining it through the sheath pipe 1 to the tunnel side. The sheath tube 1 and the diameter-expanding bit 18 are left in the drilled hole 56 even after the water draining operation is completed.
【００２３】削孔５６内に残された鞘管１及び拡径ビッ
ト１８は、トンネルの掘削切羽５０の前方で掘削領域内
にあるため、その後に行われるトンネルの掘削時に油圧
ブレーカ等の掘削機械により切羽と一緒に掘削される。
その際、鞘管１の最先端の先導管１１以外の中継管１２
及び端末管１３は合成樹脂管からなるため、これら合成
樹脂管１２，１３の掘削に伴って掘削機械に損傷等を与
えることはない。Since the sheath pipe 1 and the expanded diameter bit 18 left in the drilled hole 56 are in the excavation area in front of the excavation face 50 of the tunnel, the excavation machine such as a hydraulic breaker is used when excavating the tunnel thereafter. Will be excavated together with the face.
At that time, the relay pipe 12 other than the leading pipe 11 of the sheath pipe 1
Since the terminal pipe 13 and the terminal pipe 13 are made of synthetic resin pipes, the excavation machine is not damaged by excavation of the synthetic resin pipes 12 and 13.
【００２４】このような水抜き工法によれば、従来の如
く水抜き作業終了後に鞘管１を削孔５６内より引き抜く
等の作業を省略することができるので、大型の水抜き専
用機を用いることなく、一般のトンネル作業者が油圧ド
リルジャンボ等を用いて水抜き作業を簡易かつ迅速に行
うことができ、作業効率及び経済性等の向上を図ること
ができる。According to such a water draining method, it is possible to omit the conventional work such as pulling out the sheath pipe 1 from the inside of the drilled hole 56 after the water draining work is completed, so that a large-sized water draining machine is used. Without doing so, a general tunnel operator can easily and quickly perform draining work using a hydraulic drill jumbo or the like, and work efficiency and economic efficiency can be improved.
【００２５】尚、上記実施形態では、地山削孔用資材と
して、最先端のロッドであるステム２１の先端及び最先
端の鞘管である先導管１１の先端にそれぞれ削孔用ビッ
ト２８及び１８を取り付け、この両ビット１８，２８を
回転させながら打撃力を加えて削孔を行うものについて
述べたが、本発明は、最先端のロッドの先端にのみ削孔
用ビットを取り付け、この削孔用ビットを回転させなが
ら打撃力を加えて削孔を行うものにも適用することがで
きる。この場合、最先端の鞘管である先導管をも含めて
全ての鞘管を、その連結部等の一部を除いて合成樹脂管
で構成すればよい。In the above embodiment, as the ground drilling material, the drilling bits 28 and 18 are respectively provided at the tip of the stem 21 which is the most advanced rod and the tip of the front conduit 11 which is the most advanced sheath pipe. Although a tool for attaching holes and making a hole by applying a striking force while rotating both the bits 18 and 28 has been described, the present invention attaches a bit for forming a hole only to the tip of the most advanced rod. It can also be applied to a tool for making a hole by applying a striking force while rotating a tool bit. In this case, all the sheath pipes including the leading pipe, which is the most advanced sheath pipe, may be made of synthetic resin pipes except for a part of the connecting portion.
【００２６】[0026]
【発明の効果】以上のように、本発明の地山削孔用資材
及びそれを用いた水抜き工法によれば、鞘管を合成樹脂
管で構成することにより、削孔作業及び掘削作業に悪影
響を及ぼすことなく、削孔内から鞘管を引き抜く作業等
を省略することができるので、大型の水抜き専用機を用
いることなく、一般のトンネル作業者が油圧ドリルジャ
ンボ等を用いて水抜き作業を簡易かつ迅速に行うことが
でき、作業効率及び経済性等の向上を有効に図ることが
できる。As described above, according to the ground drilling material of the present invention and the water draining method using the same, the sheath pipe is made of a synthetic resin pipe, which is suitable for drilling work and excavation work. Since it is possible to omit the work of pulling out the sheath pipe from the hole without adversely affecting it, general tunnel operators can use a hydraulic drill jumbo to remove water without using a large dedicated water removal machine. Work can be performed easily and quickly, and work efficiency and economic efficiency can be effectively improved.
【図１】本発明の実施形態に係る地山削孔用資材の分解
図である。FIG. 1 is an exploded view of a ground drilling material according to an embodiment of the present invention.
【図２】上記資材の構成部材である中継管と管継手との
接続構造を示す縦断側面図である。FIG. 2 is a vertical cross-sectional side view showing a connection structure between a relay pipe and a pipe joint, which are constituent members of the above material.
【図３】同じく資材の構成部材であるステムの取付ピー
ス及び拡径ビットに対する嵌め込み構造を示す縦断面図
である。FIG. 3 is a vertical cross-sectional view showing a fitting structure of the stem, which is also a constituent member of the material, with respect to the mounting piece and the expanded diameter bit.
【図４】上記嵌め込み構造をステムの先端側から見た正
面図である。FIG. 4 is a front view of the fitting structure seen from the tip side of the stem.
【図５】上記ステムの一部分の縦断面図である。FIG. 5 is a vertical cross-sectional view of a portion of the stem.
【図６】同ステムの軸方向に見た正面図である。FIG. 6 is a front view of the stem as viewed in the axial direction.
【図７】拡径ビットの正面図である。FIG. 7 is a front view of a diameter-expanding bit.
【図８】本発明の実施形態に係る水抜き工法を説明する
ための作業状態図である。FIG. 8 is a work state diagram for explaining the water draining method according to the embodiment of the present invention.
１ 鞘管 ２ インナロッド １１ 先導管 １２ 中継管（合成樹脂管） １３ 端末管（合成樹脂管） １８ 拡径ビット（削孔用ビット） １９ａ，１９ｂ 管継手 ２５ 中空孔 ２８ パイロットビット（削孔用ビット） ５６ 削孔 1 sheath tube 2 Inner rod 11 destination conduit 12 Relay pipe (synthetic resin pipe) 13 Terminal tube (synthetic resin tube) 18 Expanding Bit (Drilling Bit) 19a, 19b Pipe fitting 25 hollow holes 28 Pilot Bit (Drilling Bit) 56 drilling
フロントページの続き (72)発明者 白石 博己 大阪府堺市出島西町２番地 住友金属プ ランテック株式会社内 (56)参考文献 特開 平９−184400（ＪＰ，Ａ) 実公 平７−43264（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.7，ＤＢ名) E21B 17/00 E21D 9/04 E21D 20/00 Front page continuation (72) Inventor Hiromi Shiraishi 2 Dejima Nishimachi, Sakai City, Osaka Prefecture Sumitomo Metals Planech Co., Ltd. (56) References JP-A-9-184400 (JP, A) Jitsukohei 7-43264 (JP , Y2) (58) Fields investigated (Int.Cl. 7 , DB name) E21B 17/00 E21D 9/04 E21D 20/00
Claims (3)
し、このロッド及び鞘管を各々複数本ずつ連結して長尺
にしたもので、少なくとも最先端のロッドの先端に削孔
用ビットを取り付け、このビットを回転させながら打撃
力を加え、更にロッドの中空孔を通して水を噴出するこ
とで地山に削孔をする地山削孔用資材であって、 上記複数本の鞘管は、その継手部を鋼鉄製とした部分を
除いて合成樹脂管からなることを特徴とする地山削孔用
資材。1. A rod having a hollow hole is inserted into a sheath pipe, and a plurality of rods and sheath pipes are connected to each other to form a long rod. A drill bit is provided at least at the tip of the most advanced rod. Attached, while applying a striking force while rotating this bit, it is a material for ground drilling to drill a hole in the ground by ejecting water through the hollow hole of the rod, wherein the plurality of sheath tubes are A material for ground drilling, characterized in that it is made of synthetic resin pipe except for the joint made of steel .
なり、この先導管には、上記ロッド側の削孔用ビットと
は別の鞘管側の削孔用ビットが回転自在に取り付けられ
ているとともに、この削孔用ビットに最先端のロッドか
ら回転力及び打撃力が付与されるように構成されている
請求項１記載の地山削孔用資材。2. A tip pipe, which is the most advanced sheath pipe, is made of a metal pipe, and a drill bit on the sheath pipe side different from the rod side drill bit is rotatably attached to the tip pipe. The ground drilling material according to claim 1, wherein the drilling bit is configured such that a rotational force and a striking force are applied to the drilling bit from the most advanced rod.
用いてトンネルの切羽前方の掘削領域内で地山の水抜き
を行う水抜き工法であって、 上記資材を用いて地山に削孔をした後、ロッドを鞘管内
より引き抜いて回収し、削孔内に残された鞘管内を通し
て水抜きを行い、水抜き作業終了後も、複数の水抜き用
小孔を有する鞘管を削孔内に残すことを特徴とする水抜
き工法。3. A drainage method for draining the ground in the excavation area in front of the face of a tunnel using the material for ground drilling according to claim 1 or 2, wherein the material is used for ground removal. After drilling holes in the mountain, pull out the rod from the sheath pipe and collect it, drain water through the sheath pipe left in the drill hole, and drain multiple water even after draining work
A drainage method characterized by leaving a sheath tube having small holes in the drilled hole .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25242898A JP3468700B2 (en) | 1998-09-07 | 1998-09-07 | Ground drilling material and drainage method using it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25242898A JP3468700B2 (en) | 1998-09-07 | 1998-09-07 | Ground drilling material and drainage method using it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000080879A JP2000080879A (en) | 2000-03-21 |
| JP3468700B2 true JP3468700B2 (en) | 2003-11-17 |
Family
ID=17237236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25242898A Expired - Fee Related JP3468700B2 (en) | 1998-09-07 | 1998-09-07 | Ground drilling material and drainage method using it |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3468700B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4990597B2 (en) * | 2006-11-06 | 2012-08-01 | アロイ工業株式会社 | Drilling tool |
| JP5127274B2 (en) * | 2007-03-29 | 2013-01-23 | 株式会社Ｔｆｔ | Double-pipe excavator and its construction method |
| KR100937170B1 (en) * | 2009-04-28 | 2010-01-15 | (주)토탈지오이앤씨 | Straight drilling method of ground for micro-pile construction |
| JP5402397B2 (en) * | 2009-08-21 | 2014-01-29 | 三菱マテリアル株式会社 | Drilling tools |
| KR101443197B1 (en) * | 2013-11-01 | 2014-09-22 | (주) 금산 압입 | Apparatus for burying water intake tube and method for burying water intake tube consist of synthetic resine |
-
1998
- 1998-09-07 JP JP25242898A patent/JP3468700B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000080879A (en) | 2000-03-21 |
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