JPH0560040B2 - - Google Patents
Info
- Publication number
- JPH0560040B2 JPH0560040B2 JP16439288A JP16439288A JPH0560040B2 JP H0560040 B2 JPH0560040 B2 JP H0560040B2 JP 16439288 A JP16439288 A JP 16439288A JP 16439288 A JP16439288 A JP 16439288A JP H0560040 B2 JPH0560040 B2 JP H0560040B2
- Authority
- JP
- Japan
- Prior art keywords
- drilling
- hole
- lock bolt
- grout
- hollow part
- 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
- 238000005553 drilling Methods 0.000 claims description 17
- 239000011440 grout Substances 0.000 claims description 11
- 239000011435 rock Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 description 12
- 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
- 239000004576 sand Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000002689 soil Substances 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)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は自穿孔ロツ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 Field of Application] The present invention relates to a grouting method for supporting earth, etc. using self-drilling lock bolts.
［従来の技術］
通常、自穿孔ロツクボルトは先端にドリルヘツ
ドを取付けた中空ロツ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
グナツトでロツ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
ロツ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、カツプリングナツトの接
続箇所も多くなり、またロツ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。同時にグラウトもロ
ツクボルト先端から流出のみでは、全長にわたつ
て確実に定着させることがむづかしい。[Prior art] Normally, self-drilling lock bolts are inserted by rotating a hollow lock bolt with a drill head attached to the tip while drilling a hole in the ground, etc., and then adding lock bolts with a coupling nut as necessary to drill the hole to a predetermined length. . After the drilling work is completed, grout is injected into the hollow part of the lock bolt while the hole is in the same state. However, in the case of long drilling, there are many connection points for the coupling nut and the lock bolt is curved, so the rock It may be difficult to discharge powder or dirt powder, and high-pressure air or high-pressure water is often injected to forcefully discharge it. At the same time, it is difficult to reliably fix grout over the entire length of the bolt if it only flows out from the tip of the lock bolt.
［発明が解決しようとする課題］
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るグラウ
ト工法を提供することにある。[Problems to be Solved by the Invention] An object of the present invention is to develop a grouting method that not only forcibly discharges rock powder and soil powder generated by drilling, but also ensures thorough injection of grout even in the case of geological formations, particularly in collapsible geological formations. It is about providing.
［課題を解決するための手段］
本発明の手段は、先端にドリルヘツドを取付
け、高圧流体の流入孔となる中空部をもつ自穿孔
ロツクボルトの周面に、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
ドリルヘツド及び注出口を経てグラウトをロツク
ボルトの周りに注入することにある。[Means for Solving the Problems] The means of the present invention includes a self-drilling lock bolt having a drill head attached to its tip and a hollow portion serving as an inflow hole for high-pressure fluid, and a grout outlet communicating with the hollow portion on the circumferential surface thereof. Holes are drilled at the required intervals, and when drilling, a flexible hose with an outer diameter that approximately matches the inner diameter of the injection hole is inserted to close the outlet, and in this state, high-pressure fluid is injected to remove rock powder, earth and sand powder. After the drilling is completed, the flexible hose is removed and grout is injected from the hollow part through the drill head and spout around the lock bolt.
［実施例］ 図面を参照して本発明の実施例を説明する。[Example] Embodiments of the present invention will be described with reference to the drawings.
図において１は自穿孔ロツ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、カツプリングナツト５によつて接続できるよ
うになつている。このロツクボルト１の周面には
中空部２に連通する流出口６を少なくとも１箇所
穿つてある。図示実施例ではカツプリングナツト
５にも流出口６を形成してある。そして先端にド
リルヘツド７を取付け、地山を穿孔する。 In the figure, reference numeral 1 denotes a self-drilling lock bolt that passes through a hollow part 2 that will serve as an 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 connects with a coupling nut 5. It's getting old. 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 is also provided with an outlet 6. Then, a drill head 7 is attached to the tip and the ground is drilled.
図中８は可撓性のチユーブで中空部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
とによつ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 the hollow part 2, and is inserted into the hollow part 2 to close the above-mentioned outlet.
穿孔時は、ロツクボルト１を回転させてドリル
ヘツド７によつて穿孔し、長い場合はカツプリン
グナツト５によりロツクボルト１を継足し、所定
の長さ穿孔後、流出口６を塞ぐ位置までチユーブ
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、しかる後チユ
ーブ８を取外し、グラウトを中空部からホース１
０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 use the drill head 7 to drill the hole. If the hole is long, add the lock bolt 1 with the coupling nut 5. After drilling the hole to a predetermined length, insert the tube 8 until it closes the outlet 6. In this state, high-pressure fluid is forced into the hose 10 to forcibly remove rock powder and dirt powder, and then the tube 8 is removed and the grout is poured from the hollow part into the hose 1.
When injected through 0, a portion of the grout flows out through the outlet 6 into the perforation.
［作用］
チユーブ８により圧力損失がなく岩粉、土砂粉
は排除され、流出口によつてグラウトは孔の全長
にわたつて比較的均等域に注入される。[Function] The tube 8 removes rock powder and sand powder without pressure loss, and the outlet injects grout into a relatively uniform area over the entire length of the hole.
［効果］
本発明によればグラウトを穿孔部の全長にわた
つて注入でき、ロツクボルトを確実に定着させる
ことができる。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。従つて特に長尺
穿孔の場合や崩壊性地質の場合も極めて有利であ
る。[Effects] According to the present invention, grout can be injected over the entire length of the perforation, and the lock bolt can be securely fixed. 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ツクボルトにおけ
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
はロツクボルト及びチユーブの側面図である。
The drawing shows one embodiment of the grouting method for self-drilling lock bolts according to the present invention, and
The figure is a longitudinal side view, FIG. 2 is an enlarged view of the same as the above, and FIG. 3 is a side view of the lock bolt and tube.
Claims (1)
入孔となる中空部をもつ自穿孔ロツクボルトの周
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ツド及び注出口を経てグラ
ウトをロツクボルトの周りに注入することから成
り立つ自穿孔ロツクボルトにおけるグラウト工
法。1 Attach a drill head to the tip and drill a grout outlet that communicates with the hollow part on the circumference of the self-drilling lock bolt, which has a hollow part that serves as an inflow hole for high-pressure fluid, and when drilling, make a hole that almost matches the inner diameter of the injection hole. Insert a flexible hose with an outer diameter of A grouting method for self-drilling rock bolts consisting 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 JPH0216300A (en) | 1990-01-19 |
| JPH0560040B2 true 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) |
Families Citing this family (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 | Digging equipment and method for vertical hole and inclined hole |
| JP5941628B2 (en) * | 2011-06-29 | 2016-06-29 | 株式会社大林組 | Grouting pipe for ground reinforcement and its design method |
-
1988
- 1988-07-01 JP JP16439288A patent/JPH0216300A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0216300A (en) | 1990-01-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |