JPH0316954Y2 - - Google Patents
Info
- Publication number
- JPH0316954Y2 JPH0316954Y2 JP7620486U JP7620486U JPH0316954Y2 JP H0316954 Y2 JPH0316954 Y2 JP H0316954Y2 JP 7620486 U JP7620486 U JP 7620486U JP 7620486 U JP7620486 U JP 7620486U JP H0316954 Y2 JPH0316954 Y2 JP H0316954Y2
- Authority
- JP
- Japan
- Prior art keywords
- bit
- hole
- gravel
- ground
- drilling
- 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
Links
- 238000005553 drilling Methods 0.000 claims description 18
- 230000007423 decrease Effects 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- VNTLIPZTSJSULJ-UHFFFAOYSA-N chromium molybdenum Chemical compound [Cr].[Mo] VNTLIPZTSJSULJ-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7620486U JPH0316954Y2 (es) | 1986-05-22 | 1986-05-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7620486U JPH0316954Y2 (es) | 1986-05-22 | 1986-05-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62190779U JPS62190779U (es) | 1987-12-04 |
| JPH0316954Y2 true JPH0316954Y2 (es) | 1991-04-10 |
Family
ID=30923062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7620486U Expired JPH0316954Y2 (es) | 1986-05-22 | 1986-05-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0316954Y2 (es) |
-
1986
- 1986-05-22 JP JP7620486U patent/JPH0316954Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62190779U (es) | 1987-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8281882B2 (en) | Jack element for a drill bit | |
| US20020112894A1 (en) | Bit for horizontal boring | |
| US6183166B1 (en) | Method of centrifugally forming a subterranean soil-cement casing | |
| JP2735650B2 (ja) | 地山の補強方法と装置 | |
| JP4603652B2 (ja) | 地山の固結方法 | |
| US4911729A (en) | Overburden eliminator rock drill bit | |
| JPH0316954Y2 (es) | ||
| KR0171394B1 (ko) | 지하굴착용 선단 확대비트 | |
| JP2000314291A (ja) | フレキシブルパイプ及びトンネル地山の補強方法 | |
| JPH062474A (ja) | 穿孔装置 | |
| JP3679197B2 (ja) | 中掘工法用スクリュー | |
| JPH0230891A (ja) | 地中埋設管の敷設替え方法と装置 | |
| CN2315287Y (zh) | 在砾石层打井的钻机的钻具 | |
| JP4310281B2 (ja) | 自穿孔ボルトおよびその施工方法 | |
| JPS5945075B2 (ja) | 一次覆工を先行させるトンネル掘さく工法 | |
| US7163070B2 (en) | Drill head | |
| JPS6241108Y2 (es) | ||
| JP2527621Y2 (ja) | ロックビット | |
| JP2002047877A (ja) | 打撃式掘削工法用圧密ビット及びそれを用いた地中埋設物の埋設工法 | |
| JP2002021460A (ja) | 削孔方法およびそれに用いる削孔具 | |
| JP2578078B2 (ja) | 穿孔ビット | |
| JP3737220B2 (ja) | ロックボルトの構造 | |
| JP2894674B2 (ja) | 拡径リーミングアップ工法及びその装置 | |
| JP2003301681A (ja) | さく孔装置 | |
| KR100690255B1 (ko) | 대구경 자천공 지반 보강재 |