JP4336169B2 - How to install rock bolts - Google Patents

How to install rock bolts Download PDF

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JP4336169B2
JP4336169B2 JP2003318649A JP2003318649A JP4336169B2 JP 4336169 B2 JP4336169 B2 JP 4336169B2 JP 2003318649 A JP2003318649 A JP 2003318649A JP 2003318649 A JP2003318649 A JP 2003318649A JP 4336169 B2 JP4336169 B2 JP 4336169B2
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fixing material
lock bolt
bolt hole
fixing
valve
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JP2005083130A (en
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俊夫 安部
利昭 小野
智之 永山
健 薗田
雅彦 小林
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Nishimatsu Construction Co Ltd
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Description

本発明は、ロックボルトの施工方法に関する。 The present invention also relates to the construction how of the lock bolt.

トンネルの天端部分のように、上向きに設けたロックボルト孔に注入した定着材の漏出を防止するために、ロックボルト孔の口元に取り付けるキャップ（例えば、特許文献１または特許文献２参照）や、ロックボルトに取り付ける支持弁（例えば、特許文献３参照）等が提案されている。
特開平７−２５９４９９号公報 実登３０２００８７号公報 特開２００１−３４９１９６号公報 In order to prevent leakage of the fixing material injected into the lock bolt hole provided upward like the top end portion of the tunnel, a cap attached to the mouth of the lock bolt hole (for example, see Patent Document 1 or Patent Document 2) A support valve (see, for example, Patent Document 3) attached to a lock bolt has been proposed.
JP 7-259499 A Noto 3020087 JP 2001-349196 A

定着材の漏出を防止するキャップや支持弁は、注入後の定着材の漏出を防止することはできるが、注入時の定着材の落下を防ぐことはできず、ロックボルト先端付近に空隙ができることがあった。   Caps and support valves that prevent the leakage of fixing material can prevent the leakage of fixing material after injection, but cannot prevent the fixing material from dropping at the time of injection, and there should be a gap near the tip of the lock bolt. was there.

本発明の課題は、ロックボルト孔への定着材の注入作業において、ロックボルト先端付近に空隙を作らず定着材を注入するとともに、注入後の定着材の漏出を防止することである。   An object of the present invention is to inject a fixing material without forming a gap near the tip of the lock bolt and prevent leakage of the fixing material after the injection in the operation of injecting the fixing material into the lock bolt hole.

以上の課題を解決するため、請求項１に記載の発明は、例えば図４に示すように、坑内壁面にロックボルト孔８を穿孔し、前記ロックボルト孔８に定着材９を充填した後、ロックボルト１０を挿入し固着させるロックボルトの施工方法において、
前記ロックボルト孔８の開口部に、定着材９の漏出を防ぎ、定着材注入管１及びロックボルト１０の挿通を可能とする弁６を備えた定着材漏れ防止具２を取り付け、
前記定着材漏れ防止具２の弁６を通して、先端側面部の周囲に鍔部３を設けた定着材注入管１を挿入して定着材９を充填し、
前記定着材注入管１を抜き去った後、前記定着材漏れ防止具２の弁６を通して、ロックボルト１０を挿入して固着させることを特徴とする。 In order to solve the above-described problems, the invention according to claim 1, for example, as shown in FIG. 4, after the rock bolt hole 8 is drilled in the inner wall surface and the fixing material 9 is filled in the lock bolt hole 8, In the construction method of the lock bolt for inserting and fixing the lock bolt 10,
At the opening of the lock bolt hole 8, a fixing material leakage prevention tool 2 including a valve 6 that prevents the fixing material 9 from leaking and allows the fixing material injection pipe 1 and the lock bolt 10 to be inserted is attached.
Through the valve 6 of the fixing material leakage preventer 2, the fixing material injection pipe 1 provided with the flange 3 around the side surface portion of the tip is inserted to fill the fixing material 9,
After the fixing material injection pipe 1 is removed, a lock bolt 10 is inserted and fixed through the valve 6 of the fixing material leakage prevention tool 2.

このように、鍔部３を持つ定着材注入管１を用いて、ロックボルト孔８最深部から定着材９の充填を開始すれば、定着材注入管１の鍔部３が孔壁に密着して、定着材９注入時の下方向への漏出を防ぐので、定着材９をロックボルト孔８に空隙なく充填できる。
また、ロックボルト孔８の開口部に定着材漏れ防止具２を取り付けることで、定着材９が開口部から漏出することを防止できる。 Thus, if the fixing material injection pipe 1 having the flange 3 is used and the filling of the fixing material 9 is started from the deepest part of the lock bolt hole 8, the flange 3 of the fixing material injection pipe 1 is brought into close contact with the hole wall. Thus, since the downward leakage at the time of injecting the fixing material 9 is prevented, the fixing material 9 can be filled into the lock bolt hole 8 without any gap.
Further, by attaching the fixing material leakage prevention tool 2 to the opening of the lock bolt hole 8, it is possible to prevent the fixing material 9 from leaking from the opening.

これらを組み合わせて施工することで、ロックボルト孔８が上向きに設けられている場合でもロックボルト１０の全面接着が可能となり、ロックボルト１０の引抜き耐力が向上する。
さらに、操作が簡単であるので、それぞれの施工箇所に対して高品質の施工を均一に、短時間で行うことができる。 By carrying out a combination of these, even when the lock bolt hole 8 is provided upward, the entire lock bolt 10 can be bonded, and the pull-out strength of the lock bolt 10 is improved.
Furthermore, since the operation is simple, high-quality construction can be performed uniformly and in a short time for each construction location.

請求項１に記載の発明によれば、ロックボルトの全面接着が可能となり、ロックボルトの引抜き耐力が向上する。
さらに、操作が簡単であるので、それぞれの施工箇所に対して高品質の施工を均一に、短時間で行うことができる。 According to the first aspect of the present invention, the entire surface of the lock bolt can be bonded, and the pull-out strength of the lock bolt is improved.
Furthermore, since the operation is simple, high-quality construction can be performed uniformly and in a short time for each construction location.

以下、図を参照して本発明を実施するための最良の形態を詳細に説明する。
図１に示すように、定着材注入管１は、先端側面部に鍔部３を備える管状の部材で、図示しない定着材圧送ポンプに接続されて、ロックボルト孔８にモルタル等の定着材９を充填するものである。
また、図２に示すように、定着材漏れ防止具２は、ロックボルト孔８に係合する係合部５と、定着材注入管１及びロックボルト１０を挿通する弁６を備える管状の部材で、ロックボルト孔８の開口部に取り付け、定着材９の漏出を防ぐものである。 Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, the fixing material injection pipe 1 is a tubular member having a flange portion 3 at the tip side surface portion, and is connected to a fixing material pressure feed pump (not shown), and a fixing material 9 such as mortar is inserted into a lock bolt hole 8. Is to be filled.
As shown in FIG. 2, the fixing material leakage preventer 2 is a tubular member including an engaging portion 5 that engages with the lock bolt hole 8, and a valve 6 that passes through the fixing material injection pipe 1 and the lock bolt 10. Therefore, it is attached to the opening of the lock bolt hole 8 to prevent the fixing material 9 from leaking out.

図１に示すように、定着材注入管１の先端側面部には、スポンジやゴム等の弾性体からなる円盤状の鍔部３が設けられている。
図４に示すように、この鍔部３の外径は、定着材９を注入するロックボルト孔８の内壁に密着するように、その内径と等しい大きさか、若干大きくなっている。
定着材注入管１の一方の端は先端開口部４となっており、ここから定着材９を放出する。
鍔部３からこの先端開口部４にかけては、徐々に細くなるテーパ状になっていて、孔壁との接触により発生する砂礫が、先端開口部４に入り難くしてある。
定着材注入管１のもう一方の端は、図示しない定着材圧送ポンプに接続されている。 As shown in FIG. 1, a disc-shaped flange 3 made of an elastic material such as sponge or rubber is provided on the side surface of the front end of the fixing material injection tube 1.
As shown in FIG. 4, the outer diameter of the flange 3 is equal to or slightly larger than the inner diameter so as to be in close contact with the inner wall of the lock bolt hole 8 into which the fixing material 9 is injected.
One end of the fixing material injection pipe 1 is a tip opening 4 from which the fixing material 9 is discharged.
From the flange portion 3 to the tip opening portion 4, the taper is gradually narrowed, so that gravel generated by contact with the hole wall is difficult to enter the tip opening portion 4.
The other end of the fixing material injection pipe 1 is connected to a fixing material pressure feed pump (not shown).

図２に示した定着材漏れ防止具２の管部７は、その外径がロックボルト孔８の内径よりも小さく、ロックボルト孔８に挿入できる大きさである。
またその内径は、定着材注入管１及びロックボルト１０の外径よりも大きく、また、定着材注入管１の鍔部３を収縮または変形させて通過させることのできる大きさである。
管部７の端部付近には、スポンジ等の弾性体からなる係合部５が設けられている。
この係合部５の外径は、その弾性力によってロックボルト孔８に圧接して、定着材漏れ防止具２を固定できるように、ロックボルト孔８の内径より若干大きくなっている。 The outer diameter of the tube portion 7 of the fixing material leakage prevention tool 2 shown in FIG. 2 is smaller than the inner diameter of the lock bolt hole 8 and can be inserted into the lock bolt hole 8.
Further, the inner diameter is larger than the outer diameters of the fixing material injection tube 1 and the lock bolt 10, and is a size that allows the flange portion 3 of the fixing material injection tube 1 to be contracted or deformed to pass therethrough.
In the vicinity of the end of the tube portion 7, an engaging portion 5 made of an elastic body such as sponge is provided.
The outer diameter of the engaging portion 5 is slightly larger than the inner diameter of the lock bolt hole 8 so that the fixing material leakage prevention tool 2 can be fixed by being pressed against the lock bolt hole 8 by its elastic force.

管部７のもう一方の端部には、ゴム等の弾性体からなる弁６が設けられている。
図３に示すように、その中央部には放射状に切り込みが入っており、定着材９の漏出を防ぐと共に、ここから定着材注入管１及びロックボルト１０を挿通できる。 A valve 6 made of an elastic material such as rubber is provided at the other end of the tube portion 7.
As shown in FIG. 3, radial cuts are made in the central portion thereof to prevent leakage of the fixing material 9, and the fixing material injection tube 1 and the lock bolt 10 can be inserted from here.

次に、以上に示した定着材注入管１、定着材漏れ防止具２を用いたロックボルトの施工方法について説明する。
図４の（ａ）は坑内壁面に穿孔したロックボルト孔８の断面である。
このロックボルト孔８の開口部に、図４の（ｂ）に示すように、定着材漏れ防止具２を弁６が外側になるように取り付ける。
このとき、係合部５は、その弾性力でロックボルト孔８の内壁に圧接し、定着材漏れ防止具２を固定する。 Next, the construction method of the lock bolt using the fixing material injection pipe 1 and the fixing material leakage prevention tool 2 described above will be described.
FIG. 4A is a cross section of the lock bolt hole 8 drilled in the inner wall surface.
As shown in FIG. 4B, the fixing material leakage prevention tool 2 is attached to the opening of the lock bolt hole 8 so that the valve 6 faces outside.
At this time, the engaging portion 5 is pressed against the inner wall of the lock bolt hole 8 by its elastic force, and fixes the fixing material leakage prevention tool 2.

次に、図４の（ｃ）に示すように、定着材漏れ防止具２の弁６を通して、定着材注入管１をロックボルト孔８最深部まで挿入する。
鍔部３は弾性体からなるので、管部７を通過するときは、収縮または変形させて通過できる。
また、管部７を通過後は、もとの形に復元しロックボルト孔８の内壁に密着するようになる。
定着材注入管１をロックボルト孔８に挿入する際に、孔壁と鍔部３の密着度が高い場合は、適当な手段を用いて定着材注入管１の先端または鍔部３から空気を逃がすようにしても良い。 Next, as shown in FIG. 4C, the fixing material injection pipe 1 is inserted to the deepest part of the lock bolt hole 8 through the valve 6 of the fixing material leakage prevention tool 2.
Since the collar part 3 consists of an elastic body, when passing the pipe part 7, it can be made to shrink | contract or deform | transform and pass.
In addition, after passing through the tube portion 7, it is restored to its original shape and comes into close contact with the inner wall of the lock bolt hole 8.
When the fixing material injection tube 1 is inserted into the lock bolt hole 8, if the close contact between the hole wall and the flange portion 3 is high, air is supplied from the tip of the fixing material injection tube 1 or the flange portion 3 using an appropriate means. You may make it escape.

定着材注入管１をロックボルト孔８最深部まで挿入したら、定着材９の充填を開始する。
図４の（ｄ）に示すように定着材９の充填は、定着材注入管１を引き抜きながら、もしくは、定着材注入管１が定着材９の注入圧力で自動的に押し下げられながら行う。
定着材９充填中は、定着材注入管１に設けられた鍔部３が、定着材９の漏出を防ぐので、空隙ができること無く定着材９を充填できる。 When the fixing material injection pipe 1 is inserted to the deepest part of the lock bolt hole 8, filling of the fixing material 9 is started.
As shown in FIG. 4D, the fixing material 9 is filled while the fixing material injection tube 1 is pulled out or while the fixing material injection tube 1 is automatically pushed down by the injection pressure of the fixing material 9.
During filling of the fixing material 9, the flange 3 provided in the fixing material injection pipe 1 prevents leakage of the fixing material 9, so that the fixing material 9 can be filled without forming a gap.

ロックボルト孔８の開口部まで定着材９の充填が完了したら、定着材注入管１を抜き去り、図４の（ｅ）に示すように定着材漏れ防止具２だけをロックボルト孔８に残す。
さらに図４の（ｆ）に示すように、ロックボルト１０を、定着材漏れ防止具２の弁６を通してロックボルト孔８に挿入する。
そして、定着材９が固着した後、座金等を取り付けて施工完了とする。 When the filling of the fixing material 9 to the opening of the lock bolt hole 8 is completed, the fixing material injection tube 1 is removed, and only the fixing material leakage prevention tool 2 is left in the lock bolt hole 8 as shown in FIG. .
Further, as shown in FIG. 4 (f), the lock bolt 10 is inserted into the lock bolt hole 8 through the valve 6 of the fixing material leakage preventer 2.
Then, after the fixing material 9 is fixed, a washer or the like is attached to complete the construction.

以上のように、この施工方法によれば、定着材９を空隙無くロックボルト孔８に充填でき、さらに、充填開始から固着完了まで定着材９の漏出を防ぐことができる。
これによって、ロックボルト１０の全面接着が可能となり、ロックボルト１０の引抜き耐力が向上する。
また、操作が簡単であるので、それぞれの施工箇所に対して高品質の施工を均一に、短時間で行うことができる。 As described above, according to this construction method, the fixing material 9 can be filled into the lock bolt hole 8 without a gap, and leakage of the fixing material 9 can be prevented from the start of filling to the completion of fixing.
As a result, the entire surface of the lock bolt 10 can be bonded, and the pull-out strength of the lock bolt 10 is improved.
In addition, since the operation is simple, high-quality construction can be performed uniformly and in a short time for each construction location.

なお、以上の実施の形態においては、鍔部３を一段としたが、本発明はこれに限定されるものではなく、鍔部３を多段にわたって設けても良く、その材質等も任意である。
また、係合部５や弁６も同様に多段にわたって設けても良く、その形状や材質等も任意であり、その他、具体的な細部構造等についても適宜に変更可能であることは勿論である。 In the above embodiment, the collar portion 3 is provided in a single stage, but the present invention is not limited to this, and the collar portion 3 may be provided in multiple stages, and the material thereof is arbitrary.
Similarly, the engaging portion 5 and the valve 6 may be provided in multiple stages, the shape and material thereof are arbitrary, and other specific details such as the detailed structure can be changed as appropriate. .

本発明を適用した一実施の形態の構成を示す、定着材注入管の斜視図である。It is a perspective view of a fixing material injection tube showing the configuration of an embodiment to which the present invention is applied. 定着材漏れ防止具の斜視図である。It is a perspective view of a fixing material leakage prevention tool. 図３の底面図である。FIG. 4 is a bottom view of FIG. 3. ロックボルトの施工方法を示す図である。It is a figure which shows the construction method of a rock bolt.

符号の説明Explanation of symbols

１ 定着材注入管
２ 定着材漏れ防止具
３ 鍔部
４ 先端開口部
５ 係合部
６ 弁
７ 管部
８ ロックボルト孔
９ 定着材
１０ ロックボルト DESCRIPTION OF SYMBOLS 1 Fixing material injection pipe 2 Fixing material leak prevention tool 3 Gutter part 4 Tip opening part 5 Engagement part 6 Valve 7 Pipe part 8 Lock bolt hole 9 Fixing material 10 Lock bolt

Claims (1)

坑内壁面にロックボルト孔を穿孔し、前記ロックボルト孔に定着材を充填した後、ロックボルトを挿入し固着させるロックボルトの施工方法において、
前記ロックボルト孔の開口部に、定着材の漏出を防ぎ、定着材注入管及びロックボルトの挿通を可能とする弁を備えた定着材漏れ防止具を取り付け、
前記定着材漏れ防止具の弁を通して、先端側面部の周囲に鍔部を設けた定着材注入管を挿入して定着材を充填し、
前記定着材注入管を抜き去った後、前記定着材漏れ防止具の弁を通して、ロックボルトを挿入して固着させることを特徴とするロックボルトの施工方法。 In the construction method of the lock bolt for drilling the lock bolt hole in the wall surface of the pit, filling the lock bolt hole with the fixing material, and inserting and fixing the lock bolt,
At the opening of the lock bolt hole, a fixing material leakage prevention tool having a valve that prevents leakage of the fixing material and enables insertion of the fixing material injection pipe and the lock bolt is attached.
Through the valve of the fixing material leakage prevention tool, a fixing material injection tube having a collar portion around the side surface of the tip is inserted to fill the fixing material,
After removing the fixing material injection pipe, a lock bolt is inserted and fixed through a valve of the fixing material leakage prevention tool.
JP2003318649A 2003-09-10 2003-09-10 How to install rock bolts Expired - Fee Related JP4336169B2 (en)

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Publication number Priority date Publication date Assignee Title
KR102235447B1 (en) * 2020-09-07 2021-04-05 정희갑 Fixing cap for rock bolt

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JP5903036B2 (en) * 2012-12-21 2016-04-13 鹿島建設株式会社 Method for fixing shear reinforcement member

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JP2982989B2 (en) * 1992-02-12 1999-11-29 岡部株式会社 Hard urethane foam injection method using hollow bolts and chemical liquid injector
JP2553336Y2 (en) * 1993-06-29 1997-11-05 株式会社ケー・エフ・シー Injection fixing type support member
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102235447B1 (en) * 2020-09-07 2021-04-05 정희갑 Fixing cap for rock bolt

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