JPS56167017A - Subsoil survey by ae methd - Google Patents
Subsoil survey by ae methdInfo
- Publication number
- JPS56167017A JPS56167017A JP15321079A JP15321079A JPS56167017A JP S56167017 A JPS56167017 A JP S56167017A JP 15321079 A JP15321079 A JP 15321079A JP 15321079 A JP15321079 A JP 15321079A JP S56167017 A JPS56167017 A JP S56167017A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- stress
- subsoil
- layer
- sensors
- 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
Abstract
PURPOSE: To accomplish an accurate and quick measurement by arranging a number of AE detection sensors in a hole in the direction of depth when pressure resistance or the like of subsoil is measured depending on the pattern of an acoustic emission (AE) generated with the application of a stress to the layer.
CONSTITUTION: In a subsoil survey, first sensors 5aW5z are inserted into a hole 1 at a proper interval. Then, the opening of the hole is sealed up with a packer 2 and a mud is forced into the hole 1 with a liquid injector 4 to apply a stress to the layers. As a result, an AE comes from the layers according to the pressure resistant characteristics thereof. They are detected with individual sensors 5aW5z and transmitted separately to a recorder 7 by way of a signal processing circuit 6 to record. For example, this recording can be so designed as to make a property diagram which indicates changes in the occurance of AE per unit time (AE occurence rate δ) released when a gradually increasing stress is applied to a certain layer with the passage of time. In the drawing, the pressure resistant characteristics of the layer is estimated from the magnitude So value of the stress at the point B.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15321079A JPS56167017A (en) | 1979-11-26 | 1979-11-26 | Subsoil survey by ae methd |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15321079A JPS56167017A (en) | 1979-11-26 | 1979-11-26 | Subsoil survey by ae methd |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56167017A true JPS56167017A (en) | 1981-12-22 |
Family
ID=15557444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15321079A Pending JPS56167017A (en) | 1979-11-26 | 1979-11-26 | Subsoil survey by ae methd |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56167017A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61162621A (en) * | 1985-01-09 | 1986-07-23 | Takenaka Komuten Co Ltd | Method and device of detecting limit pressure resistance of ground and the like |
US4733567A (en) * | 1986-06-23 | 1988-03-29 | Shosei Serata | Method and apparatus for measuring in situ earthen stresses and properties using a borehole probe |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4878717A (en) * | 1972-01-22 | 1973-10-22 |
-
1979
- 1979-11-26 JP JP15321079A patent/JPS56167017A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4878717A (en) * | 1972-01-22 | 1973-10-22 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61162621A (en) * | 1985-01-09 | 1986-07-23 | Takenaka Komuten Co Ltd | Method and device of detecting limit pressure resistance of ground and the like |
US4733567A (en) * | 1986-06-23 | 1988-03-29 | Shosei Serata | Method and apparatus for measuring in situ earthen stresses and properties using a borehole probe |
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