JPH0216300A - Grouting in self-drilling lock bolt - Google Patents
Grouting in self-drilling lock boltInfo
- Publication number
- JPH0216300A JPH0216300A JP16439288A JP16439288A JPH0216300A JP H0216300 A JPH0216300 A JP H0216300A JP 16439288 A JP16439288 A JP 16439288A JP 16439288 A JP16439288 A JP 16439288A JP H0216300 A JPH0216300 A JP H0216300A
- Authority
- JP
- Japan
- Prior art keywords
- drilling
- grout
- lock bolt
- hollow section
- self
- 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
- 238000005553 drilling Methods 0.000 title claims abstract description 22
- 239000011435 rock Substances 0.000 claims abstract description 20
- 239000011440 grout Substances 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 5
- 239000002689 soil Substances 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000011796 hollow space material Substances 0.000 claims 1
- 239000000945 filler Substances 0.000 abstract 2
- 239000000428 dust Substances 0.000 abstract 1
- 239000004576 sand Substances 0.000 abstract 1
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分母］
本発明は自穿孔ロックボルトを用いて地山等を支保する
際のグラウト工法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Denominator] The present invention relates to a grouting method for supporting earth, etc. using self-drilling rock bolts.
［従来の技術］
通常、自穿孔ロックボルトは先端にド’Ｊ ルヘッドを
取付けた中空ロックボルトを回転させて地山等に穴を穿
ちつつ挿入し、必要に応じてカプリングナツトでロック
ボルトを継ぎ足して所定長さまで穿孔する。穿孔作業完
了後はそのままの状態でロックボルトの中空部にグラウ
トを圧注入するが、長尺穿孔の場合は、カップリングナ
ツトの接続箇所も多くなり、またロックボルトの弯曲が
生じるため、穿孔時の岩粉或は土砂粉の排出が困難にな
ることがあり、高圧空気や高圧水を注入して強制排出さ
せる場合が多い。[Prior art] Normally, a self-drilling lock bolt is inserted by rotating a hollow lock bolt with a drill head attached to the tip, drilling a hole in the ground, etc., and adding additional lock bolts with a coupling nut as necessary. Drill the hole to the specified length. After the drilling work is completed, grout is injected into the hollow part of the rock bolt while the hole is in that state. However, when drilling a long hole, there are many coupling nut connections and the rock bolt is curved, so it is difficult to It may be difficult to discharge rock powder or soil powder, and high pressure air or high pressure water is often injected to force the discharge.
同時にグラウトもロックボルト先端から流出のみでは、
全長にわたって確実に定着させることがむづかしい。At the same time, if the grout only flows out from the tip of the rock bolt,
It is difficult to securely fix the entire length.
［発明が解決しようとする課！ｉｉ］
本発明の課題は、地山、特に崩壊性地質の場合でも穿孔
により生じた岩粉や土砂粉の強制排出はもとよりグラウ
トの注入が万全に行われろグラウト工法を提供すること
にある。[The problem that the invention attempts to solve! ii] An object of the present invention is to provide a grouting method that allows not only the forcible discharge of rock powder and soil powder produced by drilling, but also the injection of grout even in the case of geological formations, especially collapsible geological formations.
［課題を解決するための手段］
本発明の手段は、先端にドリルヘッドを取付け、高圧流
体の注入孔となる中空部をもつ自穿孔ロックボルトの周
直に、前記中空部に連絡するグラウト流出口を必要とす
る間隔で開孔し、穿孔時には、注入孔の内径とほぼ一致
する外径の可撓性ホースを挿入して流出口を塞ぎ、この
状態で高圧流体を注入して岩粉、土砂粉を強制排出し、
穿孔完了後に前記可撓性ホースを取外して中空部よりド
リルヘッド及び注出口を経てグラウトをロックポル１−
の周りに注入することにある。[Means for Solving the Problems] The means of the present invention has a drill head attached to the tip, and a grout flow connected to the hollow part directly around the circumference of a self-drilling rock bolt having a hollow part that serves as an injection hole for high-pressure fluid. Open holes at the required intervals for outlets, and when drilling holes, plug the outlet by inserting a flexible hose with an outer diameter that roughly matches the inner diameter of the injection hole.In this state, high-pressure fluid is injected to collect rock powder. Forcibly discharge soil powder,
After drilling is completed, remove the flexible hose and pour the grout from the hollow part through the drill head and spout.
It lies in injecting around.
［実 施 例］ 図面を参照して本発明の詳細な説明する。[Example] The present invention will be described in detail with reference to the drawings.
図において１は自穿孔ロックボルトで注入孔となる中空
部２を貫通し、外周の全長にわたり螺旋溝３ａが生じる
ようなリブ４のあるねじ３を形成し、カップリングナツ
ト５によって接続できろようになっている。この−ロッ
クボルト１の周面には中空部２に連通ずる流出口６を少
なくとも１箇所穿っである。図示実施例ではカップリン
グナツト５にも流出口６を形成しである。In the figure, 1 is a self-drilling lock bolt that penetrates the hollow part 2 that becomes the injection hole, forms a screw 3 with a rib 4 such that a spiral groove 3a is formed over the entire length of the outer periphery, and can be connected with a coupling nut 5. It has become. At least one outlet 6 communicating with the hollow portion 2 is bored in the circumferential surface of the lock bolt 1. In the illustrated embodiment, the coupling nut 5 also has an outlet 6 formed therein.
そして先端にドリルへラド７を取付け、地山を穿孔する
。Then, attach RAD 7 to the drill tip and drill into the ground.
図中８は可撓性のチューブで中空部２とほぼ合致する外
径を備え、これを中空部２に挿入することによって前記
の流出口を塞ぐものである。In the figure, reference numeral 8 denotes a flexible tube having an outer diameter that approximately matches that of the hollow portion 2, and is inserted into the hollow portion 2 to close the above-mentioned outflow port.
穿孔時は、ロックボルト１を回転させてドリルヘッド７
によって穿孔し、長い場合はカップリングナツト５によ
りロックボルト１を継足し、所定の長さ穿孔後、流出口
６を塞ぐ位置までチューブ８を挿入した状態で高圧流体
をホース１０より圧入して岩粉や土砂粉を強制排除し、
しかる後チューブ８を取外し、グラウトを中空部からホ
ース１０を通じて注入すると、グラウトの一部は流出口
６から穿孔部に流出する。When drilling, rotate the lock bolt 1 and press the drill head 7.
If the hole is long, add the rock bolt 1 with the coupling nut 5, and after drilling the hole to a predetermined length, insert the tube 8 to the position where it closes the outlet 6, and press high-pressure fluid through the hose 10 to remove the rock. Forcibly removes powder and dirt,
Thereafter, when the tube 8 is removed and grout is injected from the hollow part through the hose 10, a portion of the grout flows out from the outlet 6 into the perforated part.
［作 用］
チューブ８により圧力損失なく岩粉、土砂粉ハ排除され
、流出口によってグラウトは孔の全長にわたって比較的
均等域に注入される。[Function] Rock powder and dirt powder are removed by the tube 8 without pressure loss, and grout is injected into a relatively uniform area over the entire length of the hole by the outlet.
［効 果］
本発明によればグラウトを穿孔部の全長にわたって注入
でき、ロックボルトを確実に定着させることができる。[Effects] According to the present invention, grout can be injected over the entire length of the perforation, and the rock bolt can be reliably fixed.
しかも岩粉、土砂粉の強制排出も圧力の損失なく円滑に
行われる。従って特に長尺穿孔の場合や崩壊性地質の場
合も極めて有利である。Moreover, the forced discharge of rock powder and dirt powder is carried out smoothly without loss of pressure. Therefore, it is extremely advantageous especially in the case of long drilling or in the case of collapsible geology.
図面は本発明に係る自穿孔ロックボルトにおけるグラウ
ト工法の一実施例を示したもので、第１図は縦断側面図
、第２図は同上の拡大図、第３図はロックボルト及びチ
ューブの側面図である。The drawings show one embodiment of the grouting method for self-drilling rock bolts according to the present invention, in which Fig. 1 is a vertical side view, Fig. 2 is an enlarged view of the same, and Fig. 3 is a side view of the rock bolt and tube. It is a diagram.
Claims (1)
中空部をもつ自穿孔ロックボルトの周面に、前記中空部
に連絡するグラウト流出口を開孔し、穿孔時には、注入
孔の内径とほぼ一致する外径の可撓性ホースを挿入して
流出口を塞ぎ、この状態で高圧流体を注入して岩粉、土
砂粉を強制排出し、穿孔完了後に前記可撓性ホースを取
外して中空部よりドリルヘッド及び注出口を経てグラウ
トをロックボルトの周りに注入することから成り立つ自
穿孔ロックボルトにおけるグラウト工法。A drill head is attached to the tip, and a grout outlet that communicates with the hollow part is drilled on the circumference of the self-drilling rock bolt, which has a hollow part that serves as an injection hole for high-pressure fluid. A flexible hose with a matching outer diameter is inserted to close the outlet, and in this state, high-pressure fluid is injected to forcibly discharge the rock powder and soil powder. After the drilling is completed, the flexible hose is removed and the hollow space is closed. A grouting method for self-drilling rock bolts that consists of injecting grout around the rock bolts through a drill head and spout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16439288A JPH0216300A (en) | 1988-07-01 | 1988-07-01 | Grouting in self-drilling lock bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16439288A JPH0216300A (en) | 1988-07-01 | 1988-07-01 | Grouting in self-drilling lock bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0216300A true JPH0216300A (en) | 1990-01-19 |
| JPH0560040B2 JPH0560040B2 (en) | 1993-09-01 |
Family
ID=15792255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16439288A Granted JPH0216300A (en) | 1988-07-01 | 1988-07-01 | Grouting in self-drilling lock bolt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0216300A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002004275A (en) * | 2000-06-26 | 2002-01-09 | Okabe Co Ltd | Execution method of anchor for withstanding horizontal force and anchor for withstanding horizontal force |
| KR100864371B1 (en) * | 2008-04-30 | 2008-10-21 | 주식회사 경동건설 | Vertical horizontal and quadrangular drilling rigs and excavation methods |
| JP2013011091A (en) * | 2011-06-29 | 2013-01-17 | Ohbayashi Corp | Grout pipe for ground reinforcement and designing method therefor |
-
1988
- 1988-07-01 JP JP16439288A patent/JPH0216300A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002004275A (en) * | 2000-06-26 | 2002-01-09 | Okabe Co Ltd | Execution method of anchor for withstanding horizontal force and anchor for withstanding horizontal force |
| KR100864371B1 (en) * | 2008-04-30 | 2008-10-21 | 주식회사 경동건설 | Vertical horizontal and quadrangular drilling rigs and excavation methods |
| JP2013011091A (en) * | 2011-06-29 | 2013-01-17 | Ohbayashi Corp | Grout pipe for ground reinforcement and designing method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0560040B2 (en) | 1993-09-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |