JPH037800B2 - - Google Patents
Info
- Publication number
- JPH037800B2 JPH037800B2 JP14144084A JP14144084A JPH037800B2 JP H037800 B2 JPH037800 B2 JP H037800B2 JP 14144084 A JP14144084 A JP 14144084A JP 14144084 A JP14144084 A JP 14144084A JP H037800 B2 JPH037800 B2 JP H037800B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- rock
- injection
- filler
- 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
Links
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 239000011435 rock Substances 0.000 claims description 29
- 239000000945 filler Substances 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 238000010276 construction Methods 0.000 claims description 8
- 238000005553 drilling Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000004570 mortar (masonry) Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【発明の詳細な説明】
本発明はロツ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.
＜＞ 発明の目的 ［産業上の利用分野］ 土木。<> Purpose of the invention [Industrial application field] Civil engineering.
［従来の技術］
ロツクボルト工法は、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つて
締付けて掘削による岩盤のゆるみを防止し、掘削
の岩盤等の崩落を防止するものである。[Conventional technology] The lock bolt method is a method used in tunnel construction, etc., to tighten the rock at the excavated surface with bolts to the deep hard rock to prevent the rock from loosening due to excavation, and to prevent the rock from collapsing during excavation. be.
ロツ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、孔内にロツクボルトを挿入し充填剤の硬化に
よつてロツクボルトを固定、定着させる方法がと
られている。 To secure and anchor the rock bolt to solid rock,
A method is used in which a filler such as mortar is injected into the drilled hole, a lock bolt is inserted into the hole, and the lock bolt is fixed and fixed by the hardening of the filler.
［本発明が解決しようとする問題点］
上記の従来の方では、注入するモルタル等の充
填剤が、孔周辺の細かいクラツクにまで侵入する
ことが難しいので、孔周辺の広い範囲にわたる定
着が困難であつた。[Problems to be Solved by the Present Invention] In the above-mentioned conventional method, it is difficult for the injected 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. It was hot.
また湧水が多い場合や砂糖、砂礫層等の様に固
結度の低い地盤での採用が出なかつた。 Furthermore, 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 sugar or gravel layers.
［発明の目的］
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対応が可能なロツク
ボルト工法を提供するこことを目的とする。[Object of the invention] The present invention has been made in view of the above points, and provides a rock bolt construction method that is capable of fixing a wide area around a hole and can be used on ground with spring water or poorly consolidated ground. The purpose here is to provide.
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ツクボルトを孔内に
挿入し、ロツ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、ロツクボルト工法に
関するものである。 That is, the present invention relates to a rock bolt construction method, which is characterized in that after a filler is injected into the hole, a hollow rock bolt having an injection hole is inserted into the hole, and a ground injection agent is press-fitted from the injection path of the rock bolt. It is something.
＜＞ 発明の構成
［問題点を解決するための手段］
次に本発明のロツクボルト工法の実施例を説明
するが、まず使用する各装置について説明する。<> Structure of the Invention [Means for Solving Problems] Next, an embodiment of the lock bolt construction method of the present invention will be described, but first, each device used will be described.
(イ) 削孔装置
削孔装置はケーシングＫやインナーチユーブ
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 that performs drilling while inserting the casing K, inner tube, etc.
(ロ) ロツクボルト（第１図）
本発明に使用するロツクボルト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.
さらにその壁面に複数の注入孔１４を開設す
る。 Furthermore, a plurality of injection holes 14 are opened 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ツク
ボルト工法について説明する。 Next, the lock bolt construction method of the present invention using each of the above-mentioned 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、インナーチユ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Ｋやインナーチユーブ等を
引抜き、削孔装置と充填剤７の置き換えを行
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 K, inner tube, etc. are pulled out, and the hole drilling device and filler 7 are replaced.
(ロ) ロツクボルトの挿入（第３図）
充填剤７で満たされた孔Ｃ内にロツクボルト
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
(ハ) 地山注入剤の注入（第４図）
充填剤７が硬化しロツクボルト１と地山Ａが
接着した後、またはロツクボルト１を定着した
後、ロツクボルト１の注入路１２に高圧で地山
注入剤６を注入する。 This is when the filler 7 has not yet sufficiently hardened (c) Injecting the ground injection agent (Figure 4) After the filler 7 has hardened and the rock bolt 1 and the ground A have bonded together, or After fixing the rock bolt 1, a rock injection agent 6 is injected into the injection path 12 of the rock bolt 1 at high pressure.
高圧で注入１２に注入された地山注入剤６は
注入孔１４から弾力性を有するスリーブ１３を
押し除けてロツクボルト１の外部に噴出し、硬
化している充填剤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 rock injection agent 6 injected into the injection hole 12 at high pressure pushes the resilient sleeve 13 away from the injection hole 14 and is ejected to the outside of the lock bolt 1, breaking the hardened filler 7 and filling it. 7 and into the fine cracks A' of the ground A' and harden.
(ニ) ロツクボルトの締付け
地山注入剤６が地山Ａの細かい亀裂A′内に
浸透し硬化した後、ロツクボルト１のボルトね
じ部１１によつて地山Ａを締付ける。(d) Tightening the lock bolt After the rock injection agent 6 penetrates into the fine cracks A' of the rock A' and hardens, the rock A is tightened by the bolt thread part 11 of the rock bolt 1.
＜＞ 発明の効果
本発明は以上説明したようになるので次によう
な効果を期待することができる。<> 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ロツ
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ツクボルトの注入路から
注入する。(a) A rock bolt is inserted into the hole filled with a filler with low fluidity, and after the filler has hardened or settled, a rock injection agent is injected 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.
従つ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ツクボルト内か
ら噴出させる。(b) In order to penetrate the ground injection agent into the fine cracks, the ground injection agent is ejected 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. The 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
吹付け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 stop the water and improve work efficiency in 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、ロツクボルトの用途を拡大す
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, injection can improve the ground, expanding the uses of rock bolts and improving their effectiveness at the same time.
第１図：本発明に使用するロツクボルトの説明
図、第２〜４図：本発明のロツクボルト工法の説
明図
１：ロツクボルト、１１：ボルトねじ部、１
２：注入路、１３：スリーブ、１４：注入孔、
６：地山注入剤、７：充填剤、Ａ：地山、A′：
亀裂、Ｃ：孔、Ｋ：ケーシング。
Figure 1: An explanatory diagram of the lock bolt used in the present invention, Figures 2 to 4: An explanatory diagram of the lock bolt construction method of the present invention 1: Lock bolt, 11: Bolt threaded part, 1
2: injection path, 13: sleeve, 14: injection hole,
6: Ground injection agent, 7: Filler, A: Ground mass, A':
Crack, C: hole, K: casing.
Claims (1)
入し、 ロツ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、 ロツクボルト工法。[Claims] 1. A rock bolt characterized in that after a filler is injected into the hole, a hollow rock bolt having an injection hole is inserted into the hole, and a ground injection agent is press-fitted from the injection path of the 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 JPS6121300A (en) | 1986-01-29 |
| JPH037800B2 true 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) |
Families Citing this family (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
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6121300A (en) | 1986-01-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |