JPS6475949A - Face breaking detector of shield excavator - Google Patents
Face breaking detector of shield excavatorInfo
- Publication number
- JPS6475949A JPS6475949A JP23346187A JP23346187A JPS6475949A JP S6475949 A JPS6475949 A JP S6475949A JP 23346187 A JP23346187 A JP 23346187A JP 23346187 A JP23346187 A JP 23346187A JP S6475949 A JPS6475949 A JP S6475949A
- Authority
- JP
- Japan
- Prior art keywords
- gamma
- rays
- face
- shield
- 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.)
- Granted
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
PURPOSE:To always monitor the breaking state of a face easily even during excavation, by providing a gamma-ray source and a scintillation detector in the hole part formed to a skin plate in a state separated by a shield body. CONSTITUTION:A radio isotope 11 being a gamma-ray source is mounted in the mount hole 10 bored in the shield body 9 at the center of the small diameter part 1b of the piercing hole 1 provided on the top part of the skin plate 3 of a shield main body 2 and the upper end part of a scintillation probe 8 is engaged with the large diameter part 1a of said piercing hole 1. When gamma-rays are allowed to irradiate outwardly from the isotope 11, a part of gamma-rays are again incident to the Nal(Tl) scintillator 13 of the probe 8 as back scattering rays by the contact with natural ground and the measured value of the energy of the back scattering rays is inputted to a measuring part to be counted as a counting rate and further inputted to an operational processing apparatus to be operated on the basis of a calculation formula preliminarily obtained by experiment to be displayed as face breaking quantity. By this method, the breaking state of the face can be always detected even during the evacuation by a shield excavator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23346187A JPS6475949A (en) | 1987-09-17 | 1987-09-17 | Face breaking detector of shield excavator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23346187A JPS6475949A (en) | 1987-09-17 | 1987-09-17 | Face breaking detector of shield excavator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6475949A true JPS6475949A (en) | 1989-03-22 |
JPH0546435B2 JPH0546435B2 (en) | 1993-07-13 |
Family
ID=16955394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23346187A Granted JPS6475949A (en) | 1987-09-17 | 1987-09-17 | Face breaking detector of shield excavator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6475949A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03233095A (en) * | 1990-02-07 | 1991-10-17 | Toda Constr Co Ltd | Monitoring device in sealed chamber |
JP2012102547A (en) * | 2010-11-10 | 2012-05-31 | Ohbayashi Corp | Position detecting system of natural ground excavator, and natural ground excavator equipped with the system |
JP2016094722A (en) * | 2014-11-13 | 2016-05-26 | 西松建設株式会社 | Method and device for detecting looseness in natural ground on working face side of shield machine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59108270U (en) * | 1983-01-10 | 1984-07-21 | ア−スニクス株式会社 | Radiation measurement device |
JPS61173594U (en) * | 1985-04-16 | 1986-10-28 | ||
JPS6250294U (en) * | 1985-09-19 | 1987-03-28 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57174240A (en) * | 1981-04-22 | 1982-10-26 | Teijin Ltd | Selective beam transmitting laminate |
-
1987
- 1987-09-17 JP JP23346187A patent/JPS6475949A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59108270U (en) * | 1983-01-10 | 1984-07-21 | ア−スニクス株式会社 | Radiation measurement device |
JPS61173594U (en) * | 1985-04-16 | 1986-10-28 | ||
JPS6250294U (en) * | 1985-09-19 | 1987-03-28 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03233095A (en) * | 1990-02-07 | 1991-10-17 | Toda Constr Co Ltd | Monitoring device in sealed chamber |
JP2012102547A (en) * | 2010-11-10 | 2012-05-31 | Ohbayashi Corp | Position detecting system of natural ground excavator, and natural ground excavator equipped with the system |
JP2016094722A (en) * | 2014-11-13 | 2016-05-26 | 西松建設株式会社 | Method and device for detecting looseness in natural ground on working face side of shield machine |
Also Published As
Publication number | Publication date |
---|---|
JPH0546435B2 (en) | 1993-07-13 |
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