JP2700757B2 - Apparatus and method for preventing dripping of fixing material for rock bolt - Google Patents
Apparatus and method for preventing dripping of fixing material for rock boltInfo
- Publication number
- JP2700757B2 JP2700757B2 JP5306449A JP30644993A JP2700757B2 JP 2700757 B2 JP2700757 B2 JP 2700757B2 JP 5306449 A JP5306449 A JP 5306449A JP 30644993 A JP30644993 A JP 30644993A JP 2700757 B2 JP2700757 B2 JP 2700757B2
- Authority
- JP
- Japan
- Prior art keywords
- fixing material
- hole
- ring plate
- flexible
- injection tube
- 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 - Lifetime
Links
Landscapes
- Piles And Underground Anchors (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、トンネル工事、特に全
面接着方式のロックボルト工を行った際の定着材のだれ
落ち防止装置および方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for preventing dripping of a fixing material when performing a tunnel construction, in particular, a lock bolt construction of a whole surface bonding type.
【０００２】[0002]
【従来の技術】ロックボルトは、地山自身の持つ強度を
利用して地山を支持するものであり、その原理は、発破
などによりトンネル表面のゆるんだ部分を深度の安定し
た地山にボルトと鋼材（SD30，SD35と同等のもの）で締
め付けるものである。2. Description of the Related Art Rock bolts support the ground by utilizing the strength of the ground itself. The principle is that bolts that loosen the surface of the tunnel due to blasting etc. are bolted to the ground with a stable depth. And steel (equivalent to SD30, SD35).
【０００３】その方法としてトンネル周辺の岩盤に削岩
機で穿孔し、これに所要の長さの鋼材を挿入して、その
先端部あるいは全面を岩盤に定着し、他端をベアリング
プレートとナットで締め付ける。[0003] As a method, a rock drill is used to drill a rock around a tunnel, a steel material of a required length is inserted into the hole, and the tip or entire surface is fixed to the rock, and the other end is fixed by a bearing plate and a nut. tighten.
【０００４】前記岩盤への定着で、接着式のロックボル
トは定着材としてセメントミルク、樹脂レンジ、セメン
トモルタルが用いられており、定着方法としては孔内に
定着材を充填し、その後、ボルトを挿入する方法と、ボ
ルトを挿入後に孔内に定着材を注入する方法とがある。In fixing to the rock, cement-type lock bolts are made of cement milk, a resin range, or cement mortar as a fixing material. As a fixing method, a fixing material is filled in a hole, and then the bolt is fixed. There are a method of inserting the fixing material and a method of injecting the fixing material into the hole after inserting the bolt.
【０００５】[0005]
【発明が解決しようとする課題】いずれの方法でも、ト
ンネルの天端の垂直に近いロックボルトでは削孔内に注
入された定着材が流出し、ロックボルトの定着が不完全
になるおそれがある。In any of the methods, the fixing material injected into the drilled holes may flow out of the lock bolt near the vertical end of the tunnel, and the fixing of the lock bolt may be incomplete. .
【０００６】このようにだれ落ちが生じた場合に、応急
的にウエスなどを詰めて対応しているが、十分な効果は
期待しにくく、面倒でもある。[0006] In this case, when drooping occurs, a rag or the like is stuffed up as an emergency, but a sufficient effect is hardly expected and it is troublesome.
【０００７】本発明の目的は前記従来例の不都合を解消
し、確実にかつ簡単に定着材のだれ落ちを防止して、定
着材の未充填部を無くし、ロックボルトの締め付けの信
頼性を高めることができるロックボルト用定着材だれ落
ち防止装置および方法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the disadvantages of the prior art, reliably and easily prevent the fixing material from dripping, eliminate the unfilled portion of the fixing material, and improve the reliability of the tightening of the lock bolt. It is an object of the present invention to provide an apparatus and a method for preventing a dripping of a fixing material for a lock bolt.
【０００８】[0008]
【課題を解決するための手段】本発明は前記目的を達成
するため、だれ落ち防止装置としては、削孔の開口部に
嵌める栓体として、リングプレートに、該リングプレー
トの中心で交差する直径上のスリットで扇形に均等分割
した可撓片の集合を得る可撓板体を張設し、このリング
プレートに、先端が外向きに折れ曲がる脚体を等間隔に
配してなり、この脚体の外面を削孔の開口部内周に当接
させるスカート部を設けたことを要旨とするものであ
る。In order to achieve the above object, the present invention provides a drooling prevention device, wherein a plug which fits into an opening of a drilled hole has a diameter which intersects a ring plate at the center of the ring plate. A flexible plate is obtained to obtain a set of flexible pieces equally divided into a fan shape by the upper slit. Legs whose tips are bent outward are arranged at equal intervals on this ring plate. The gist of the present invention is that a skirt portion is provided for bringing the outer surface of the hole into contact with the inner periphery of the opening of the hole.
【０００９】また、だれ落ち防止方法としては、リング
プレートに、該リングプレートの中心で交差する直径上
のスリットで扇形に均等分割した可撓片の集合を得る可
撓板体を張設し、このリングプレートに、先端が外向き
に折れ曲がる脚体を等間隔に配してなり、この脚体の外
面を削孔の開口部内周に当接させるスカート部を設けた
栓体を削孔の開口部に嵌め、前記可撓片を押し広げなが
ら削孔内に注入チューブを差し入れ、この注入チューブ
から定着材を注出して削孔内に定着材を充填させ、ま
た、注入チューブを引き抜き、同じように可撓片を押し
広げながら鋼材を削孔内に挿入し、定着材の固化後に栓
体を撤去することを要旨とするものである。[0009] As a dripping prevention method, a flexible plate is provided on a ring plate to obtain a set of flexible pieces equally divided in a fan shape by a slit having a diameter intersecting at the center of the ring plate. This ring plate is provided with legs, the ends of which are bent outward, at regular intervals, and a plug body provided with a skirt portion for abutting the outer surface of the leg against the inner periphery of the opening of the drill hole. Insert the injection tube into the drill hole while pushing and expanding the flexible piece, pour out the fixing material from this injection tube, fill the hole with the fixing material, and pull out the injection tube. The gist of the invention is to insert a steel material into the drilled hole while pushing and spreading the flexible piece, and to remove the plug after the fixing material has solidified.
【００１０】[0010]
【作用】請求項１および請求項２記載の本発明によれ
ば、可撓片を押し広げながら削孔内に注入チューブを差
し入れ、この注入チューブから定着材を注出して削孔内
に定着材を充填させると、可撓片が注入チューブの周囲
に押圧して隙間のないように閉塞しているので、だれ落
ちすることはない。そして、そのまま注入チューブを抜
き取った場合も、押し広げられた可撓片が閉じて同様に
閉塞してだれ落ちを防ぎ、さらに、同じように可撓片を
押し広げながら鋼材を削孔内に挿入した場合も可撓片が
この鋼材の周囲に押圧して隙間のないように閉塞してい
るので、だれ落ちすることはない。According to the first and second aspects of the present invention, the injection tube is inserted into the hole while the flexible piece is being pushed and spread, and the fixing material is poured out from the injection tube and the fixing material is inserted into the hole. Is filled, the flexible piece is pressed against the periphery of the injection tube and is closed without any gap, so that no dropping occurs. Then, even when the injection tube is pulled out, the expanded flexible piece closes and closes in the same way to prevent dripping, and furthermore, insert the steel material into the drilled hole while pushing the flexible piece in the same way. Also in this case, the flexible piece is pressed against the periphery of the steel material and is closed without any gap, so that the flexible piece does not drop.
【００１１】また、スカート部はこれを筒体とした場合
に比較して押圧接触面の少ないものとすることができ、
かつ、脚体の弾性によるバネ効果での係止も期待でき、
栓体のセットを容易に行うことができる。しかも、脚体
は先端が外向きに折れ曲がっているので、これを削孔の
開口縁に引掛かからせて外部に露顕させていることか
ら、栓体の転用のための撤去を行う際にはかかる脚体の
先端をつまみ上げることにより簡単に行うことができ
る。Further, the skirt portion can have a smaller pressing contact surface as compared with the case where the skirt portion is a cylindrical body,
In addition, we can expect locking by the spring effect due to the elasticity of the legs,
The plug can be easily set. Moreover, since the tip of the leg is bent outward, it is hooked on the opening edge of the drilled hole and exposed to the outside, so when removing the plug for diversion, It can be easily performed by picking up the tip of such a leg.
【００１２】[0012]
【実施例】以下、図面について本発明の実施例を詳細に
説明する。先に本発明装置について説明すると、図１、
図２に示すように、削孔の開口部に嵌める栓体７とし
て、ステンレス製の２枚のリングプレート１ａ，１ｂ間
に可撓板体としてのゴム板２を挟み込み、このリングプ
レート１ａ，１ｂに張設されるゴム板２には該リングプ
レート１ａ，１ｂの中心で交差する直径上のスリット３
を入れて、扇形に均等分割した可撓片４の集合を得るよ
うにした。かかる可撓板体としてはゴム板２の他に合成
樹脂板などでもよい。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. First, the apparatus of the present invention will be described with reference to FIG.
As shown in FIG. 2, a rubber plate 2 as a flexible plate is sandwiched between two stainless steel ring plates 1a and 1b as a plug 7 to be fitted into the opening of the drilled hole. A rubber plate 2 stretched on a slit 3 having a diameter which intersects at the center of the ring plates 1a and 1b.
To obtain a set of flexible pieces 4 equally divided into a fan shape. Such a flexible plate may be a synthetic resin plate or the like in addition to the rubber plate 2.
【００１３】また、前記リングプレート１ａ，１ｂには
空気穴５を形成し、また、背面側のリングプレート１ｂ
にはスカート部６を形成する。An air hole 5 is formed in each of the ring plates 1a and 1b, and a ring plate 1b on the rear side is formed.
Is formed with a skirt portion 6.
【００１４】このスカート部６は先端に外向きフランジ
を形成した筒体でもよいが、本実施例は、先端が外向き
に折れ曲がる脚体８を等間隔に配してなるものとする。The skirt portion 6 may be a cylindrical body having an outward flange formed at the tip, but in the present embodiment, the legs 8 having the outwardly bent end portions are arranged at equal intervals.
【００１５】図示の例では脚体８は４本を形成したもの
で、多少外側に押し開くような弾性を持たせるとよい。In the illustrated example, four legs 8 are formed, and it is preferable that the legs 8 have a certain elasticity so as to be pushed outward.
【００１６】次に前記栓体７を用いる本発明のだれ落ち
防止方法について説明する。図４に示すように、岩盤に
削岩機で削孔９を形成し、栓体７をこの削孔９の開口部
に嵌める。その際、スカート部６を形成する脚体８を絞
りながら削孔９内に押し入れ、ついで、脚体８を開口部
内周に当接するようにする。Next, a dripping prevention method of the present invention using the plug 7 will be described. As shown in FIG. 4, a drilling hole 9 is formed in the rock with a rock drill, and the plug 7 is fitted into the opening of the drilling hole 9. At this time, the leg 8 forming the skirt portion 6 is pushed into the hole 9 while being squeezed, and then the leg 8 is brought into contact with the inner periphery of the opening.
【００１７】このように削孔９の開口部に栓体７をセッ
トしたならば、可撓片４を押し広げながら削孔９内に注
入チューブ10を差し入れる。After the plug 7 has been set in the opening of the drill hole 9 as described above, the injection tube 10 is inserted into the drill hole 9 while pushing and expanding the flexible piece 4.
【００１８】そして、この注入チューブ10から定着材11
を注出して削孔９内に該定着材11を充填させ、また、注
入チューブ10を引き抜く。なお、該注入チューブ10は定
着材11を注出しながら順次引き抜くようにしてもよい。Then, the fixing material 11 is removed from the injection tube 10.
To fill the hole 9 with the fixing material 11 and pull out the injection tube 10. The injection tube 10 may be sequentially pulled out while the fixing material 11 is being poured.
【００１９】注入チューブ10を削孔９内に差し入れる際
には、図３に示すように可撓片４が注入チューブ10の周
囲に押圧して隙間のないように閉塞しているので、注入
チューブ10から定着材11を注出してもだれ落ちすること
はない。そして、そのまま注入チューブ10を抜き取った
場合も、図５に示すように、押し広げられた可撓片４が
閉じて同様に削孔９の開口を閉塞してだれ落ちを防ぐ。When the injection tube 10 is inserted into the hole 9, the flexible piece 4 is pressed around the injection tube 10 and is closed without any gap as shown in FIG. Even if the fixing material 11 is poured out of the tube 10, no one falls. Then, even when the injection tube 10 is pulled out as it is, as shown in FIG. 5, the expanded flexible piece 4 closes and similarly closes the opening of the hole 9 to prevent dripping.
【００２０】次いで、図６に示すように同じように可撓
片４を押し広げながら鋼材12を削孔９内に挿入し、定着
材11の固化後に栓体７を撤去する。Next, as shown in FIG. 6, the steel material 12 is inserted into the hole 9 while pushing the flexible piece 4 in the same manner, and the plug 7 is removed after the fixing material 11 is solidified.
【００２１】そして、この栓体７は他の削孔に転用す
る。The plug 7 is diverted to another hole.
【００２２】[0022]
【発明の効果】以上述べたように本発明のロックボルト
用定着材だれ落ち防止装置および方法は、確実にかつ簡
単に定着材のだれ落ちを防止して定着材の未充填部を無
くし、その結果、トンネル表面のゆるんだ部分を深部の
安定した地下に締め付けることができるという、ロック
ボルトの締め付け効果の信頼性を高めることができるも
のである。As described above, the apparatus and method for preventing dripping of a fixing material for a lock bolt according to the present invention reliably and easily prevent dripping of a fixing material and eliminate an unfilled portion of a fixing material. As a result, it is possible to increase the reliability of the tightening effect of the lock bolt, that is, it is possible to tighten the loose portion of the tunnel surface to a deep and stable underground.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明のロックボルト用定着材だれ落ち防止装
置の１実施例を示す平面図である。FIG. 1 is a plan view showing an embodiment of a fixing material dripping prevention device for a lock bolt according to the present invention.
【図２】本発明のロックボルト用定着材だれ落ち防止装
置の１実施例を示す縦断側面図である。FIG. 2 is a longitudinal sectional side view showing an embodiment of a fixing material dripping prevention device for a lock bolt according to the present invention.
【図３】本発明のロックボルト用定着材だれ落ち防止装
置の使用例を示す要部の拡大側面図である。FIG. 3 is an enlarged side view of a main part showing an example of use of the fixing material dripping prevention device for a lock bolt of the present invention.
【図４】本発明のロックボルト用定着材だれ落ち防止方
法の第１工程の縦断側面図である。FIG. 4 is a vertical cross-sectional side view of a first step of the method for preventing the fixing material from falling out of the lock bolt according to the present invention.
【図５】本発明のロックボルト用定着材だれ落ち防止方
法の第２工程の縦断側面図である。FIG. 5 is a vertical sectional side view of a second step of the method for preventing the dripping of a fixing material for a lock bolt according to the present invention.
【図６】本発明のロックボルト用定着材だれ落ち防止方
法の第３工程の縦断側面図である。FIG. 6 is a vertical sectional side view of a third step in the method for preventing the fixing material from falling out of the lock bolt according to the present invention.
１ａ，１ｂ…リングプレート ２…ゴム板 ３…スリット ４…可撓片 ５…空気穴 ６…スカート部 ７…栓体 ８…脚体 ９…削孔 10…注入チュー
ブ 11…定着材 12…鋼材1a, 1b ... Ring plate 2 ... Rubber plate 3 ... Slit 4 ... Flexible piece 5 ... Air hole 6 ... Skirt 7 ... Plug body 8 ... Leg 9 ... Drilling 10 ... Injection tube 11 ... Fixing material 12 ... Steel material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 重松 和男 東京都調布市飛田給二丁目19番１号 鹿 島建設株式会社 技術研究所内 (56)参考文献 実公 平３−48319（ＪＰ，Ｙ２) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazuo Shigematsu 2-9-1, Tobita-Shi, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Institute (56) References: 3-48319, JP
Claims (2)
グプレートに、該リングプレートの中心で交差する直径
上のスリットで扇形に均等分割した可撓片の集合を得る
可撓板体を張設し、このリングプレートに、先端が外向
きに折れ曲がる脚体を等間隔に配してなり、この脚体の
外面を削孔の開口部内周に当接させるスカート部を設け
たことを特徴とするロックボルト用定着材だれ落ち防止
装置。1. A flexible plate for obtaining a set of flexible pieces equally divided into a fan shape by a slit having a diameter intersecting at the center of the ring plate as a plug to be fitted into an opening of a hole. This ring plate is provided with a skirt portion on the ring plate, the legs of which the tip bends outward are arranged at regular intervals, and the outer surface of the leg is brought into contact with the inner periphery of the opening of the hole. Lock bolt fixing material dripping prevention device.
中心で交差する直径上のスリットで扇形に均等分割した
可撓片の集合を得る可撓板体を張設し、このリングプレ
ートに、先端が外向きに折れ曲がる脚体を等間隔に配し
てなり、この脚体の外面を削孔の開口部内周に当接させ
るスカート部を設けた栓体を削孔の開口部に嵌め、前記
可撓片を押し広げながら削孔内に注入チューブを差し入
れ、この注入チューブから定着材を注出して削孔内に定
着材を充填させ、また、注入チューブを引き抜き、同じ
ように可撓片を押し広げながら鋼材を削孔内に挿入し、
定着材の固化後に栓体を撤去することを特徴とするロッ
クボルト用定着材だれ落ち防止方法。2. A ring plate is provided with a flexible plate for obtaining a set of flexible pieces equally divided in a fan shape by slits having a diameter intersecting at the center of the ring plate. Outer bent legs are arranged at equal intervals, and a plug body provided with a skirt for bringing the outer surface of the legs into contact with the inner periphery of the opening of the drill hole is fitted into the opening of the drill hole, and Insert the injection tube into the hole while pushing and spreading the piece, pour out the fixing material from this injection tube, fill the hole with the fixing material, pull out the injection tube, and push the flexible piece in the same way While inserting the steel material into the drill hole,
A method for preventing dripping of a fixing material for a lock bolt, wherein the plug is removed after the fixing material is solidified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5306449A JP2700757B2 (en) | 1993-12-07 | 1993-12-07 | Apparatus and method for preventing dripping of fixing material for rock bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5306449A JP2700757B2 (en) | 1993-12-07 | 1993-12-07 | Apparatus and method for preventing dripping of fixing material for rock bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07158399A JPH07158399A (en) | 1995-06-20 |
| JP2700757B2 true JP2700757B2 (en) | 1998-01-21 |
Family
ID=17957139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5306449A Expired - Lifetime JP2700757B2 (en) | 1993-12-07 | 1993-12-07 | Apparatus and method for preventing dripping of fixing material for rock bolt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2700757B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007055835A1 (en) * | 2007-12-17 | 2009-06-25 | Hilti Aktiengesellschaft | protection element |
| JP6050968B2 (en) * | 2012-06-22 | 2016-12-21 | 矢作建設工業株式会社 | Anchor installation method for steel reinforced concrete buildings |
| JP6042779B2 (en) * | 2013-07-30 | 2016-12-14 | 鹿島建設株式会社 | Method for fixing shear reinforcement member |
| KR102229184B1 (en) * | 2019-04-23 | 2021-03-18 | 망치개발 주식회사 | Method for fixing steel rod in concrete |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2562352Y2 (en) * | 1989-09-16 | 1998-02-10 | 日東電工 株式会社 | Wire cover |
-
1993
- 1993-12-07 JP JP5306449A patent/JP2700757B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07158399A (en) | 1995-06-20 |
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