JPS6121300A - Rock bolt construction method - Google Patents
Rock bolt construction methodInfo
- Publication number
- JPS6121300A JPS6121300A JP14144084A JP14144084A JPS6121300A JP S6121300 A JPS6121300 A JP S6121300A JP 14144084 A JP14144084 A JP 14144084A JP 14144084 A JP14144084 A JP 14144084A JP S6121300 A JPS6121300 A JP S6121300A
- Authority
- JP
- Japan
- Prior art keywords
- rock bolt
- hole
- rock
- filler
- bolt
- 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
(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】 本発明はロックボルト工法に関するものである。[Detailed description of the invention] The present invention relates to a rock bolt construction method.
＜１＞発明の目的 ［産業上の利用分野］ 土木。<1> Purpose of the invention [Industrial application field] Civil engineering.
［従来の技術］
ロックボルト工法は、トンネル工事等において掘削面の
岩盤をその深部の堅岩にボルトをもって締イ１けて掘削
ににる岩盤のゆるみを防止し、掘削面の岩盤等の崩落を
防止するものである。[Conventional technology] The rock bolt method is used in tunnel construction, etc., to tighten the rock at the excavation surface with bolts to the deep hard rock to prevent the rock from loosening during excavation, and prevent the rock at the excavation surface from collapsing. This is to prevent
ロックボルトを堅岩に固定、定着させるには、削孔した
孔内にモルタル等の充填剤を注入した後、孔内にロック
ボルトを挿入し充填剤の硬化によってロックボルトを固
定、定着させる方法がとられている。To fix and anchor a rock bolt to hard rock, filler such as mortar is injected into the drilled hole, the rock bolt is inserted into the hole, and the filler hardens to fix and anchor the rock bolt. is taken.
［本発明が解決しようとする問題点］
上記の従来の方法では、注入するモルタル等の充填剤が
、孔周辺の細かいクラックにまで侵入づることが難しい
ので、孔周辺の広い範囲にわたる定着が困難であった。[Problems to be solved by the present invention] In the conventional method described above, it is difficult for the filler such as mortar to penetrate into the fine cracks around the hole, so it is difficult to fix it over a wide area around the hole. Met.
また湧水が多い場合や砂層、砂礫層等の様に固結度の低
い地盤での採用が出来なかった。In addition, it could not be used in cases where there is a lot of spring water or in ground with a low degree of consolidation such as a sand layer or a gravel layer.
［発明の目的Ｊ
本発明は以上のような点に鑑み成されたもので、孔周辺
の広い範囲の固定化と湧水のある地盤や固結性のとぼし
い地盤への苅応が可能なロックボルト工法を提供するこ
とを目的とする。[Objective of the Invention J The present invention has been made in view of the above points, and provides a lock that can be used to fix a wide area around a hole and to apply moss to ground with spring water or poorly consolidated ground. The purpose is to provide bolt construction methods.
すなわち本発明は、孔内に充填剤を注入した後、注入孔
を有する中空のロックボルトを孔内に挿入し、ロックボ
ルトの注入路から地山注入剤を圧入することを特徴とす
る、ロックボルト工法に関するものである。That is, the present invention is a lock, characterized in that after a filler is injected into a hole, a hollow rock bolt having an injection hole is inserted into the hole, and a rock injection agent is press-fitted from an injection path of the rock bolt. This is related to the bolt construction method.
〈■〉発明の構成
［問題点を解決するための手段］
次に本発明のロックボルト工法の実施例を説明するが、
まず使用Ｊ−る各装置について説明する。<■> Structure of the invention [Means for solving the problems] Next, an embodiment of the rock bolt construction method of the present invention will be described.
First, each device used will be explained.
（イ）削孔装置
削孔装置はケーシングにやインナーチューブ等を挿入し
つつ穿孔を行う従来の削孔装置を使用する。(a) Drilling device A conventional drilling device is used, which performs drilling while inserting an inner tube or the like into the casing.
（ロ）ロックボルト（第１図）
本発明に使用するロックボルト１は基端にボルトねじ部
１１を有し、その先端を尖鋭に形成した中空の円柱体の
部材である。(b) Lock bolt (FIG. 1) The lock bolt 1 used in the present invention is a hollow cylindrical member having a bolt threaded portion 11 at its base end and having a sharp tip.
そしてその中空部分を、後述の充填剤７より充分流動性
の高い地山注入剤６の注入路１２とする。The hollow portion is used as an injection path 12 for a rock injection agent 6 having a sufficiently higher fluidity than a filler 7 to be described later.
ざらにその壁面に複数の注入孔１４を開設する。A plurality of injection holes 14 are roughly formed in the wall surface.
そしてゴム等の弾力性を有する帯状のスリーブ１３を環
状に設置して、注入孔１４を外部から閉塞する。Then, a belt-shaped sleeve 13 having elasticity such as rubber is installed in an annular manner to close the injection hole 14 from the outside.
次に上記の各装置を使用しての本発明のロックボルト工
法について説明する。Next, the rock bolt construction method of the present invention using each of the above devices will be explained.
（イ）充填剤注入（第２図）
公知の削孔装置で削孔後、ケーシングＫを後退させつつ
、インナーチューブの空間を利用するなどして孔Ｃ内に
モルタル等の充填剤７を注入しつつケーシングにやイン
ナーチューブ等を引抜き、削孔装置と充填剤７の置ぎ換
えを行う。(B) Filler injection (Figure 2) After drilling with a known hole drilling device, filler 7 such as mortar is injected into hole C by using the space of the inner tube while retracting casing K. While doing so, the casing, inner tube, etc. are pulled out, and the hole drilling device and filler 7 are replaced.
（ロ）ロックボルトの挿入（第３図）
充填剤７で満たされた孔Ｃ内にロックボルト１を、その
先端から挿入する。(b) Inserting the lock bolt (Fig. 3) Insert the lock bolt 1 into the hole C filled with the filler 7 from its tip.
その時期は充填剤７が、まだ充分に硬化していない時で
ある。At this time, the filler 7 has not yet sufficiently hardened.
（ハ）地山注入剤の注入（第４図）
充填剤７が硬化しロックボルト１と地山Ａが接着した後
、またはロックボルト１を定着した後、ロックボルト１
の注入路１２に高圧で地山注入剤６を注入する。(c) Injecting the rock bolt 1 (Fig. 4) After the filler 7 has hardened and the rock bolt 1 and the rock A have adhered, or after the rock bolt 1 has been fixed, the rock bolt 1
The ground injection agent 6 is injected into the injection path 12 at high pressure.
高圧で注入路１２に注入された地山注入剤６は注入孔１
４から弾力性を有するスリーブ１３を押し除けてロック
ボルト１の外部に噴出し、硬化しでいる充填剤７をおし
割りつつ充填剤７や地山Ａの細かい亀裂Ａ′内に浸透し
硬化する。The ground injection agent 6 injected into the injection path 12 at high pressure is injected into the injection hole 1.
The elastic sleeve 13 is pushed away from the rock bolt 1, and it is ejected to the outside of the rock bolt 1, and while breaking the hardened filler 7, it penetrates into the filler 7 and the fine cracks A' of the ground A, and hardens. do.
（ニ）ロックボルトの締付は
地山注入剤６が地山△の細かい亀裂Ａ′内に浸透し硬化
した後、ロックボルト１のボルトねじ部１１によって地
山Ａを締付ける。(d) Tightening of the rock bolt: After the rock injection agent 6 penetrates into the fine cracks A' of the rock Δ and hardens, the rock bolt 1 is tightened by the bolt threaded portion 11 of the rock bolt 1.
＜ｌ［＞発明の効果
本発明は以上説明したようになるので次のような効果を
期待することができる。<l[>Effects of the Invention Since the present invention has been described above, the following effects can be expected.
（イ）流動性の低い充填剤が充填された孔内に［１ツク
ボルトを挿入し、充填剤が硬化または定着した後に地山
注入剤をロックボルトの注入路から注入する。(a) Insert a bolt into the hole filled with a filler with low fluidity, and after the filler hardens or settles, inject the ground injection agent through the injection path of the rock bolt.
地山注入剤は流動性が高いので充填剤や地山の細かい亀
裂内に浸透することができる。Because the ground injection agent has high fluidity, it can penetrate into the filler and fine cracks in the ground.
従って孔周辺の広い範囲を定着させることができる。Therefore, it is possible to fix a wide area around the hole.
（ロ）細かい亀裂内にまで地山注入剤を浸透させるため
に、地山注入剤を高圧でロックボルト内から噴出させる
。(b) In order to penetrate the ground injection agent into the fine cracks, the ground injection agent is squirted from inside the rock bolt at high pressure.
地山注入剤は高圧で注入されるから、本来なら孔の入口
から地山注入剤が逆流してくることが考えられるが、本
発明では孔内はすでに硬化した充填剤で満たされている
ので孔の入口から地山注入剤が漏出することがない。Since the ground injection agent is injected under high pressure, it would normally be possible for the ground injection agent to flow back from the entrance of the hole, but in the present invention, the inside of the hole is already filled with hardened filler. Ground injection agent will not leak out from the hole entrance.
（ハ）湧水が多い場合コンクリートまたはモルタル吹付
は等のその後の工程に障害が残るが、注入により止水効
果が得られるのでその後の工程の作業効率が向上する。(c) If there is a lot of spring water, problems will remain in subsequent processes such as concrete or mortar spraying, but injection will provide a water stop effect and improve the efficiency of subsequent processes.
（ニ）固結性の乏しい地盤の場合でも注入により地盤の
改良ができ、ロックボルトの用途を拡大号ると同時にそ
の効果を向上させることが出来る。(d) Even in the case of poorly consolidated ground, the ground can be improved by injection, expanding the uses of rock bolts and improving their effectiveness at the same time.
【図面の簡単な説明】
第１図二本発明に使用するロックボルトの説明図筒２〜
４図二本発明のロックボルト工法の説明図１：ロックボ
ルト １１：ボルトねじ部１２：注入路 １３ニスリー
ブ １４：注入孔６：地山注入剤 ７：充填剤[Brief explanation of the drawings] Figure 1.2 Explanation of the lock bolt used in the present invention Tube 2~
4 Figure 2 Explanation of the rock bolt construction method of the present invention Figure 1: Rock bolt 11: Bolt threaded portion 12: Injection path 13 Ni sleeve 14: Injection hole 6: Ground injection agent 7: Filler
Claims (1)
特徴とする、 ロックボルト工法。[Claims] After injecting the filler into the hole, a hollow rock bolt having an injection hole is inserted into the hole, and the ground injection agent is press-fitted from the injection path of the rock bolt. Rock bolt construction method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14144084A JPS6121300A (en) | 1984-07-10 | 1984-07-10 | Rock bolt construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14144084A JPS6121300A (en) | 1984-07-10 | 1984-07-10 | Rock bolt construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6121300A true JPS6121300A (en) | 1986-01-29 |
| JPH037800B2 JPH037800B2 (en) | 1991-02-04 |
Family
ID=15291995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14144084A Granted JPS6121300A (en) | 1984-07-10 | 1984-07-10 | Rock bolt construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6121300A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08226118A (en) * | 1991-09-27 | 1996-09-03 | Maeda Corp | Lock bolt construction method with concurrent use of chemical grouting construction method |
| WO2005073510A1 (en) * | 2004-01-28 | 2005-08-11 | Denki Kagaku Kogyo Kabushiki Kaisha | Expandable injection bolt and grouting method using same |
-
1984
- 1984-07-10 JP JP14144084A patent/JPS6121300A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08226118A (en) * | 1991-09-27 | 1996-09-03 | Maeda Corp | Lock bolt construction method with concurrent use of chemical grouting construction method |
| WO2005073510A1 (en) * | 2004-01-28 | 2005-08-11 | Denki Kagaku Kogyo Kabushiki Kaisha | Expandable injection bolt and grouting method using same |
| JP2007528456A (en) * | 2004-01-28 | 2007-10-11 | 電気化学工業株式会社 | Expansion injection bolt and injection method using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH037800B2 (en) | 1991-02-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |