ISSN: 1945-7545
CODEN: GTJODJ
Page Count: 8

A Self-Boring Pressuremeter System

Fahey, M
Lecturer and senior lecturer, University of Western Australia, Nedlands,

Jewell, RJ
Lecturer and senior lecturer, University of Western Australia, Nedlands,

Brown, TA
Director, T.A. Brown Electronics, Mt. Lawley,

Abstract

The paper describes some of the development work on the Cambridge University version of the self-boring pressuremeter (the so-called “Camkometer”), which has been carried out at the University of Western Australia over a number of years. This work included improvement of the pore-pressure measuring system and development of a deairing system for the pore-pressure transducers, new supply-voltage regulation and signal amplification systems placed down-hole in the instrument itself, test control and data logging using a microcomputer, and a new membrane-protection system. Details of the improved instrumentation are provided. Some test results are included to show that the output from the pore-pressure transducers provides an indication of the “quality” of drilling, especially in clay.

Keywords:
pressuremeters, self-boring, pore pressure, instrumentation, signal conditioning

Paper ID: GTJ10005J
DOI: 10.1520/GTJ10005J
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