Apparatus for determining the variations in volume of an expanda

Details Apparatus for determining the variations in volume of an expanda Apparatus for determining the variations in volume of an expanda

1984-05-16

1986-07-08

Swisher, S. Clement

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Earth stresses

73149, G01N 310, G01N 3324

Patent

active

045985910

ABSTRACT:
The invention relates to pressuremetric apparatus used to determine the mechanical properties of soil.
The apparatus comprises means which include solenoid valves (10, 14, 19), pressure sensors (11, 16, 20), and an electronic unit (21) which controls the solenoid valves on the basis of information from the sensors and of preselected information, so as to automatically provide a pressure rise, in accordance with the desired program, in the dilatable cell of the pressuremeter.
The invention is useful in controlling the pressure rise in probes of pressuremetric apparatus.

REFERENCES:
patent: 2957341 (1960-10-01), Menard
patent: 3772911 (1973-11-01), Ruppeneit
Winter, 5 Geotechnical Testing Journal (Nos. 3/4, Sep./Dec. 1982), pp. 85-88.

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