JPS6241899A - Method of fixing construction of tubular lock bolt - Google Patents
Method of fixing construction of tubular lock boltInfo
- Publication number
- JPS6241899A JPS6241899A JP19429086A JP19429086A JPS6241899A JP S6241899 A JPS6241899 A JP S6241899A JP 19429086 A JP19429086 A JP 19429086A JP 19429086 A JP19429086 A JP 19429086A JP S6241899 A JPS6241899 A JP S6241899A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- rock bolt
- ground
- rock
- bit
- 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.)
- Pending
Links
Landscapes
- Joining Of Building Structures In Genera (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は管状ロックボルトの定着工法に関し、特にＮ
ＡＴＭ工法によるトンネル掘削において地ＩＩ＋を補強
するのに適用される工法に関する。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a fixing method for tubular rock bolts, and in particular to a method for fixing tubular rock bolts.
This invention relates to a construction method applied to reinforcing ground II+ in tunnel excavation using the ATM construction method.
（従来の技術）
一般にＮＡＴＭＴ法によるトンネル掘削の場合、掘削後
口ツクポル１へを地山に打込み、その補強がなされてい
る。ロックボルトは大別すると先端定着型と全面接着型
とに分けられるが、ＮＡＴＭＴ法の場合一般に後者が採
用されている。(Prior Art) In general, when excavating a tunnel using the NATMT method, after the excavation, the opening 1 is driven into the ground and reinforced. Rock bolts can be roughly divided into tip-fixed type and fully adhesive type, and the latter is generally adopted in the case of the NATMT method.
全面接着型ロックボルトの施工は、良質地１１１の場合
、（１）穿孔、（２）定着材の注入、（３）ロックボル
トの打込み等というような作業手順で行われるが、悪質
地山の場合、穿孔後直ちに孔壁が崩壊し、そのため定着
材の注入及びロックボルトの打込み作業を行うことが困
難となり、ロックボルトの施工が不可能となる。The construction of fully adhesive type rock bolts is carried out in the case of good quality ground 111 by the following steps: (1) drilling, (2) injection of fixing material, (3) driving of rock bolts, etc. In this case, the hole wall collapses immediately after drilling, making it difficult to inject the fixing material and drive the rock bolt, making it impossible to install the rock bolt.
そのような悪質他山の場合、ロックポル１へとして鋼管
等の管状のものを使用し、その周壁に多数の注入孔を設
けるとともに、先端にビットを取付け、この管状ロック
ボルト自身によって穿孔し、その後注入孔から地山に定
着材を注入する方式が採用されている。In the case of such a malicious bolt, use a tubular object such as a steel pipe as Rockpol 1, provide a large number of injection holes on its peripheral wall, attach a bit to the tip, drill the hole with this tubular rockbolt itself, and then A method is used in which the fixing material is injected into the ground through an injection hole.
（発明が解決しようとする問題点）
しかしながら、この方式はロックボルト自身を回転させ
て穿孔するため、外周地Ｉｌ＋が練られ、ベース１〜状
となってロックポル１〜の周囲に付着し、その後定着材
を注入しても地１１１との確実な定着状態が得られず、
また先端に取付けるビットは使い捨てどなるため、極め
て高価なものになるという問題点があった。(Problem to be Solved by the Invention) However, in this method, the rock bolt itself is rotated to make the hole, so the outer periphery Il+ is kneaded, forms a base 1~ and adheres around the rock bolt 1~, and then Even if the fixing material is injected, a reliable fixing state with the base 111 cannot be obtained,
Another problem is that the bit attached to the tip is disposable, making it extremely expensive.
この発明は−１−記のような従来の問題点を解決するた
めになされたものであって、悪質地１１１においてもロ
ックポル１〜を地１１１に桶実に定着させることができ
、また経済性に優れた工法を提供することを１−１的と
する。This invention was made in order to solve the conventional problems as described in -1-, and it is possible to fix Rockpol 1~ on the ground 111 even in the bad ground 111, and it is also economical. Our 1-1 objective is to provide excellent construction methods.
（問題点を解決するための手段）
−Ｉ−記問題点を解決するためのこの発明は、周壁に多
数の孔を有する管状ロックポル１−に穿孔ロッドを挿入
してその先端のピッ１〜をロックポル１〜の先端から突
出させ、前記ピッ１へにより地１１１にロックポル１へ
の外径以１−の孔を穿孔しながら、同時に該孔にロック
ポル１−を打込んだ後、ロックボルトから穿孔ロッドを
引抜き、ロックポルｌ−に定着材を注入してその周壁の
孔から地１１１に注入することを特徴とするものである
。(Means for Solving the Problems) In order to solve the problems described in I-, this invention involves inserting a perforating rod into a tubular rock pole 1 having a large number of holes in the peripheral wall, and drilling holes 1 at the tip of the rod. Protrude from the tip of Rockpole 1~, and while drilling a hole 1- in the ground 111 with the outer diameter of Rockpole 1~ using the aforementioned pin 1, simultaneously drive Rockpole 1- into the hole, and then drill from the Rockbolt. This method is characterized in that the rod is pulled out, the fixing material is injected into the rock pole l-, and the fixing material is injected into the ground 111 through a hole in its peripheral wall.
（実施例）
第】１シ１はこの発明」−法に使用する管状ロックポル
１へ１を示し、このロックボルト１は鋼管等からなり、
周壁に多数の孔２が設けられ、後端内周面に第２図に示
すプラグ４を螺着するためのねし部３が形成されている
。プラグ４は注入孔４ａ＆有し、中間に段部５が設けら
れ、この段部５によって形成される大小径部分の外周面
にねし部６，７が形成され、ねじ部６においてロックポ
ル１へ１の後端に螺着される。(Example) 1 shows the tubular lock bolt 1 used in the method of this invention, and this lock bolt 1 is made of a steel pipe or the like,
A large number of holes 2 are provided in the peripheral wall, and a threaded portion 3 for screwing a plug 4 shown in FIG. 2 is formed on the inner peripheral surface of the rear end. The plug 4 has an injection hole 4a and a stepped portion 5 in the middle. Threaded portions 6 and 7 are formed on the outer peripheral surface of the large and small diameter portion formed by the stepped portion 5, and the threaded portion 6 connects to the lock port 1. It is screwed onto the rear end of 1.
次に上記のような管状ロックポル１への定着工法を第３
Ａ −３Ｄ図を参照しながら説明する。Next, the third method of fixing to the tubular rock pole 1 as described above is applied.
This will be explained with reference to A-3D diagram.
第３Ａ図に示すようにロックボルト１に穿孔ロッド９を
挿入して、その先端のビット１１． ＋２をロックポル
１〜１の先端から突出させ、穿孔機本体１０により穿孔
ロッド９を回転させ、ピッ１〜Ｉ＋により先掘りしたう
え、ピッ１−１２により地山８にロックポル１〜１の少
目Ｙ以」二の孔１；３を穿孔する。その際、穿孔しなが
ら、同時に孔１３にロックポル！−１を打込む。As shown in FIG. 3A, the drilling rod 9 is inserted into the lock bolt 1, and the bit 11. +2 protrudes from the tips of Rock Poles 1 to 1, rotates the drilling rod 9 using the drilling machine main body 10, performs advance digging with Pit 1 to I+, and drills a small amount of Rock Pols 1 to 1 into the ground 8 with Pit 1-12. Drill the second holes 1 and 3 beyond Y. At that time, while drilling, at the same time, Rockpol was applied to hole 13! Enter -1.
ロックポル１−１の打込後、第３Ｂ図に示すようにロッ
クポル１〜１から穿孔ロッド９を引抜き、ロックポル１
へ１の後端にプラグ４を螺着する。After driving the rockpoles 1-1, pull out the drilling rod 9 from the rockpoles 1-1 as shown in FIG. 3B, and
Screw the plug 4 onto the rear end of the head 1.
次いで第３Ｃ図に示すように、プラグ４の注入孔４ａに
ホース１３を接続し、注入ポンプ１４によりロックポル
１−１にモルタル等の定着月を注入する。注入された定
着材はロックボルト１の周壁の孔２から出て、その周囲
の地山８に浸透する。そして定着材の硬化後、第３ Ｄ
図に示すように、プラグ４に座金１５を装着したうえ、
ねじ部７にナラ１−１６を螺着して施工を完了する。Next, as shown in FIG. 3C, a hose 13 is connected to the injection hole 4a of the plug 4, and a fixing material such as mortar is injected into the rock poll 1-1 using the injection pump 14. The injected fixing material comes out from the hole 2 in the peripheral wall of the rock bolt 1 and permeates into the surrounding ground 8. After curing the fixing material, the third D
As shown in the figure, the washer 15 is attached to the plug 4, and
Screw the nuts 1-16 onto the threaded portion 7 to complete the construction.
第４〜（３図は、この発明工法に使用する穿孔装置を示
し、穿孔ロッ］く９の先端部には係合溝１８およびその
後方に抑圧フランジ１９がそれぞれ設けられ、この先端
部に一端が開放した空所１１ａを有する筒状の第１ビッ
ト１１が嵌着されている。ロッド９の先端部の形状およ
び第１ビット１１の空所１１ａの形状はともに多角形と
なっており、それによりロッド９および第１ピッ１−１
１が軸方向に相対的に摺動可能ではあるが、回転不能と
なっている。２１は第２ピツ１〜１２の先端部外周に設
けられた切削刃である。4 to 3 show a drilling device used in the method of this invention, in which an engagement groove 18 is provided at the tip of the drilling rod 9 and a suppression flange 19 is provided behind it, and one end A cylindrical first bit 11 having an open space 11a is fitted.The shape of the tip of the rod 9 and the shape of the space 11a of the first bit 11 are both polygonal. Rod 9 and 1st pitch 1-1
1 is relatively slidable in the axial direction, but is not rotatable. 21 is a cutting blade provided on the outer periphery of the tip of the second pits 1 to 12.
第１ピツ１へ１１の周壁には軸方向に延びる複数の透孔
２２が周方向に間隔を置いて設けられ、これらの透孔２
２に第２ピツ１へ１２が嵌着されている。A plurality of through holes 22 extending in the axial direction are provided in the peripheral wall of the first pit 1 to 11 at intervals in the circumferential direction, and these through holes 2
12 is fitted into the second pit 1 at 2.
第２ピツ１〜１２は外側部に切削刃２３が設けろるとと
もに、内側部にロッドの係合溝１８に係合可能な突起２
４が設けられ、第２ピツ１へ全体を取り巻くリングばね
２５によって常時内向に付勢されている。そして第２ビ
ツト１２はロッド９の先端面が空所１１ａの底壁１１１
）に近接したとき、リングばね２５の付勢力に抗して突
起２４がロッ１−９の係合溝１８の手前の外周面に係止
して、切削刃２３が透孔２２から外方に突出しく第４図
示状態）、ロッド９の先端面が空所１１ａの底壁１１ｂ
から離間したとき、リングばね２５の伺勢力により突起
２４が係合溝１８に係合して切削刃２３が透孔２２内に
没入する６一
（第５図示の状態）ようになっている。The second pits 1 to 12 are provided with a cutting blade 23 on the outside, and have a protrusion 2 on the inside that can be engaged with the engagement groove 18 of the rod.
4 is provided, and is constantly biased inwardly toward the second pit 1 by a ring spring 25 surrounding the whole. The second bit 12 has the tip end surface of the rod 9 connected to the bottom wall 111 of the cavity 11a.
), the protrusion 24 engages the outer peripheral surface of the lock 1-9 in front of the engagement groove 18 against the biasing force of the ring spring 25, and the cutting blade 23 moves outward from the through hole 22. (state shown in the fourth figure), the tip end surface of the rod 9 is the bottom wall 11b of the cavity 11a.
When separated from the ring spring 25, the protrusion 24 engages with the engagement groove 18 and the cutting blade 23 sinks into the through hole 22 (state shown in the fifth figure).
２６はロッド９をロックボルト１内に同心的に配置する
ための放射状スペーサである。26 is a radial spacer for arranging the rod 9 concentrically within the lock bolt 1.
１−記構成により第２ピツ１へ１２の切削刃２３が透孔
２２から突出した第４図示の状態でロックポル１−１の
外径以上の孔１３を穿孔することが可能であり、かつ穿
孔後節５同示のようにロッド９をロックポルＩ〜１から
引抜くと、第２ビツト】２の突起２４が係合溝１８に係
合して該第２ビツト１２が透孔２２内に没入し、それに
より第２ピツｈ１２がロックポル１〜１内を通過ｉ［能
となり、したがってロット９を第１．第２ビット１１．
１２を伴ったまま容易に引抜くことができる。1- With the configuration described above, it is possible to drill a hole 13 having a diameter equal to or larger than the outer diameter of the lock hole 1-1 in the state shown in FIG. When the rod 9 is pulled out from the lock pole I~1 as shown in the rear section 5, the protrusion 24 of the second bit 2 engages with the engagement groove 18, and the second bit 12 sinks into the through hole 22. As a result, the second pit h12 passes through the lock ports 1 to 1, and therefore the lot 9 is transferred to the first lot. Second bit 11.
It can be easily pulled out with 12 attached.
（発明の効果）
以−１−のようにこの発明によれば、地山に管状ロック
ボルトの外径以上の孔を穿孔しながら、同時にその孔に
ロックボルトを打込むので、従来のように周囲の地山を
練り回すことがなく、したがって定着材の注入によりロ
ックボルトを確実に地１１１に定着させることができる
。またロアー
ツクポル１〜それ自体にはピッ１〜を装着する必要がな
く、従来のように使い捨てとならす経済的である。(Effects of the Invention) As described in -1- below, according to the present invention, a hole larger than the outer diameter of the tubular rock bolt is drilled in the ground and the rock bolt is driven into the hole at the same time. There is no need to knead the surrounding ground, and therefore the rock bolt can be reliably fixed to the ground 111 by injecting the fixing material. Further, it is not necessary to attach the pin 1 to the Roarts Cupol 1 itself, and it is economical because it is disposable as in the past.
第１図はこの発明に法に使用するロックポル１−の一部
所面図、第２図はプラグの断面図、第３Ａ〜３１）図は
、この発明工法の施工手順を示す断面図、第４図は穿孔
装置の要部の断面図であって、穿孔状態を示す図、第５
図は穿孔ロットの引抜時の状態を示す断面図、第６回は
第４図の線Ｖｌ’ −ＶＴに沿って得られる断面図。
１・管状ロックポル１〜 ２・・・孔
４ プラグ ８・・・地 １１１９・・・穿孔ロ
ット Ｉ＋、１２・・・ビット１２・孔
１５ 注入ポンプ帛６回Figure 1 is a partial plan view of Rockpol 1- used in the method of this invention, Figure 2 is a sectional view of the plug, Figures 3A to 31) are sectional views showing the construction procedure of this invention method, Figure 4 is a sectional view of the main parts of the drilling device, showing the drilling state;
The figure is a cross-sectional view showing the state of the perforated rod when it is pulled out, and the sixth figure is a cross-sectional view taken along the line Vl'-VT in FIG. 4. 1. Tubular rock pole 1-2... Hole 4 Plug 8... Ground 1119... Drilling lot I+, 12... Bit 12, Hole
15 Infusion pump 6 times
Claims (1)
ッドを挿入してその先端のビットをロックボルトの先端
から突出させ、前記ビットにより地山にロックボルトの
外径以上の孔を穿孔しながら、同時に該孔にロックボル
トを打込んだ後、ロックボルトから穿孔ロッドを引抜き
、ロックボルトに定着材を注入してその周壁の孔から地
山に注入することを特徴とする管状ロックボルトの定着
工法。1. Insert a drilling rod into a tubular rock bolt that has many holes in the surrounding wall, make the bit at the tip protrude from the tip of the rock bolt, and use the bit to drill a hole in the ground that is larger than the outer diameter of the rock bolt. , At the same time, after driving the rock bolt into the hole, the drilling rod is pulled out from the rock bolt, and the fixing material is injected into the rock bolt, and the fixing material is injected into the ground through the hole in the peripheral wall of the rock bolt. Construction method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19429086A JPS6241899A (en) | 1986-08-20 | 1986-08-20 | Method of fixing construction of tubular lock bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19429086A JPS6241899A (en) | 1986-08-20 | 1986-08-20 | Method of fixing construction of tubular lock bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6241899A true JPS6241899A (en) | 1987-02-23 |
Family
ID=16322136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19429086A Pending JPS6241899A (en) | 1986-08-20 | 1986-08-20 | Method of fixing construction of tubular lock bolt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6241899A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02140311A (en) * | 1988-06-23 | 1990-05-30 | Hideo Murakami | Pipe anchor construction for avalanche preventing fence |
| JPH0776819A (en) * | 1993-09-07 | 1995-03-20 | Osaka Bosui Constr Co Ltd | Improving method for ground of tunnel excavation part and peripheral part thereof |
| JPH0776820A (en) * | 1993-09-07 | 1995-03-20 | Osaka Bosui Constr Co Ltd | Improving method for ground of tunnel excavation part and periphery thereof |
| JPH0782735A (en) * | 1993-09-17 | 1995-03-28 | Osaka Bosui Constr Co Ltd | Soil improvement method of tunnel excavated section and peripheral section thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54137401A (en) * | 1978-04-18 | 1979-10-25 | Tone Boring Co | Drilling method of anchor hole |
| JPS5736214A (en) * | 1980-08-14 | 1982-02-27 | Japanese National Railways<Jnr> | Reinforcing construction work of lock bolt for soft ground |
-
1986
- 1986-08-20 JP JP19429086A patent/JPS6241899A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54137401A (en) * | 1978-04-18 | 1979-10-25 | Tone Boring Co | Drilling method of anchor hole |
| JPS5736214A (en) * | 1980-08-14 | 1982-02-27 | Japanese National Railways<Jnr> | Reinforcing construction work of lock bolt for soft ground |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02140311A (en) * | 1988-06-23 | 1990-05-30 | Hideo Murakami | Pipe anchor construction for avalanche preventing fence |
| JPH0776819A (en) * | 1993-09-07 | 1995-03-20 | Osaka Bosui Constr Co Ltd | Improving method for ground of tunnel excavation part and peripheral part thereof |
| JPH0776820A (en) * | 1993-09-07 | 1995-03-20 | Osaka Bosui Constr Co Ltd | Improving method for ground of tunnel excavation part and periphery thereof |
| JPH0782735A (en) * | 1993-09-17 | 1995-03-28 | Osaka Bosui Constr Co Ltd | Soil improvement method of tunnel excavated section and peripheral section thereof |
| JP2566522B2 (en) * | 1993-09-17 | 1996-12-25 | 株式会社大阪防水建設社 | Ground improvement method for tunnel excavation and its surroundings |
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