JPH0640091U - Rock bolt for mirror surface reinforcement - Google Patents
Rock bolt for mirror surface reinforcementInfo
- Publication number
- JPH0640091U JPH0640091U JP7471492U JP7471492U JPH0640091U JP H0640091 U JPH0640091 U JP H0640091U JP 7471492 U JP7471492 U JP 7471492U JP 7471492 U JP7471492 U JP 7471492U JP H0640091 U JPH0640091 U JP H0640091U
- Authority
- JP
- Japan
- Prior art keywords
- mirror surface
- lock bolt
- rock bolt
- surface reinforcement
- hole
- 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.)
- Pending
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
(57)【要約】 （修正有）
【目的】 隧道を掘さくする時に生じる鏡面の補強がで
きるロックボルトで途中から簡単に切り落しできるもの
を提供すること。
【構成】 薄肉のロックボルト本体１の適所に軸芯と直
角の貫通小孔２を設けて切り落し易くしたこと。
(57) [Summary] (Correction) [Purpose] To provide a lock bolt that can be easily cut off from the middle to reinforce the mirror surface that occurs when digging a tunnel. [Structure] A thin-walled lock bolt main body 1 is provided with a through-hole 2 at a right angle to the shaft core at an appropriate position to facilitate cutting.
Description
【０００１】[0001]
本考案は掘さくした隧道の正面（鏡面）を補強する鏡面補強用ロックボルトに 関するものである。 The present invention relates to a mirror bolt for reinforcing a mirror surface that reinforces the front surface (mirror surface) of an excavated tunnel.
【０００２】[0002]
大きい断面や崩れ易い岩や土砂の隧道を掘さくするには図５の（ａ）に示すよ うに先ず隧道の上部Ａのみを掘さくしてこのＡ部にモルタルを吹付け、ロックボ ルト１を適所に折込んでＡ部の土砂崩れを防ぎ、Ｂ部、Ｃ部はＡ部の掘削に支障 がないように掘削して行く。 In order to dig a large section or a rock or earth and sand tunnel that tends to collapse, as shown in Fig. 5 (a), first dig only the upper part A of the tunnel and spray mortar on this part A, and place the rock bolt 1 in the right place. To prevent landslides in part A and excavate parts B and C so that they do not interfere with the excavation of part A.
【０００３】 このように掘さくが進行するとロックボルトが突出するので、これを切断する 必要がある。従来はロックボルトを途中から切断する作業に手数を要し、これを 解決するため、グラスファイバーパイプ等を用いたが、腐食しないため、廃棄処 理に費用と手数を要していた。As the digging progresses in this way, the lock bolt protrudes, so it is necessary to cut it. Conventionally, it took a lot of time to cut the lock bolt from the middle, and in order to solve this, glass fiber pipes and the like were used.
【０００４】[0004]
本考案の課題は、途中から容易に切り落しでき、しかも補強作用に支障を来た すことのない鏡面補強用のロックボルトを提供することにある。 An object of the present invention is to provide a lock bolt for mirror surface reinforcement that can be easily cut off from the middle and that does not hinder the reinforcing action.
【０００５】[0005]
本考案の手段は次のとおりである。 The means of the present invention are as follows.
【０００６】 薄肉鉄パイプから成るロックボルト本体の適所に軸芯と直角の貫通孔を穿った 鏡面補強用ロックボルト。A lock bolt for mirror surface reinforcement, which has a through hole at a right angle to the axis in a proper position of a lock bolt main body made of a thin iron pipe.
【０００７】[0007]
図５の（ｃ）に示すようにＡの鏡面を掘さくしてＡ′まで掘った後貫通孔の箇 所からロックボルトを掘さく機の爪で切り落しその先の掘さくに支障を来たさな いようにする。 As shown in Fig. 5 (c), after digging the mirror surface of A and digging up to A ', the rock bolt was cut off from the through hole with the nail of the digging machine, which hindered the drilling beyond that. Try not to.
【０００８】[0008]
図中１は薄肉の鉄パイプで成形したロックボルト本体で所要間隔置に軸芯と直 角に小径の貫通孔２を穿ち、切り落しできるようにしてある。図示の貫通孔２は 周りに切欠３，３′を対設して破壊を一層容易にしてある。 In the figure, reference numeral 1 denotes a lock bolt main body formed of a thin iron pipe, and through holes 2 having a small diameter are formed at right intervals at right intervals and can be cut off. The through hole 2 shown in the drawing has notches 3 and 3'provided around it to make breakage easier.
【０００９】[0009]
本考案によれば、鏡面の補強は十分に行ない、本体は薄肉で貫通孔の箇所から 切り落しできて便利である。 According to the present invention, the mirror surface is sufficiently reinforced, and the main body is thin and can be cut off from the through hole, which is convenient.
【図１】正面図。FIG. 1 is a front view.
【図２】図１のＸ−Ｘ′線断面図。FIG. 2 is a sectional view taken along line XX ′ of FIG.
【図３】図２の一部の拡大図。FIG. 3 is an enlarged view of a part of FIG.
【図４】図２の正面図。FIG. 4 is a front view of FIG.
【図５】隧道の掘さく順序を示す説明図。FIG. 5 is an explanatory view showing a drilling order of a tunnel.
１ ボルト本体 ２ 貫通孔 1 Bolt body 2 Through hole
Claims (1)
の適所に軸芯と直角の貫通孔を穿った鏡面補強用ロック
ボルト。1. A lock bolt for reinforcing a mirror surface, wherein a lock bolt main body made of a thin-walled iron pipe is provided with a through hole at a right position with respect to a shaft core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7471492U JPH0640091U (en) | 1992-10-27 | 1992-10-27 | Rock bolt for mirror surface reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7471492U JPH0640091U (en) | 1992-10-27 | 1992-10-27 | Rock bolt for mirror surface reinforcement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0640091U true JPH0640091U (en) | 1994-05-27 |
Family
ID=13555170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7471492U Pending JPH0640091U (en) | 1992-10-27 | 1992-10-27 | Rock bolt for mirror surface reinforcement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0640091U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0313687A (en) * | 1989-06-09 | 1991-01-22 | Fujita Corp | Stable construction method for tunnel face section |
| JPH03262894A (en) * | 1990-03-14 | 1991-11-22 | Fujita Corp | Tunnel face stabilization work method |
-
1992
- 1992-10-27 JP JP7471492U patent/JPH0640091U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0313687A (en) * | 1989-06-09 | 1991-01-22 | Fujita Corp | Stable construction method for tunnel face section |
| JPH03262894A (en) * | 1990-03-14 | 1991-11-22 | Fujita Corp | Tunnel face stabilization work method |
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