Air lubricated penetrometer rod system

Details Air lubricated penetrometer rod system Air lubricated penetrometer rod system

1992-10-16

1994-06-14

Raevis, Robert

Measuring and testing

Hardness

By penetrator or indentor

73 9, G01N 300

Patent

active

053199596

ABSTRACT:
An air or gaseous fluid lubricated penetrometer reduces friction between the soil and the push rod string. Air is pumped into the interior of the string and is directed by exit ports into the annular space between the soil and the outer walls of the string. Without damaging the soil, the air prevents the soil from adhering to the sides of the string and thereby reduces frictional forces that restrict the downward movement thereof. The exit ports in the string are located above the instrument housing so that accurate measurements can be made on the soil properties.

REFERENCES:
patent: 845120 (1907-02-01), Raymond
patent: 848395 (1907-03-01), Raymond
patent: 4499954 (1985-02-01), Diggle
"Site Characterization Using the Cone Penetrometer Test", Olsen et al., A Specialty Conference, Use of Insitu Testing in Geotechnical Engineering, Jun. 22-25, 1986.
"Soil Classification and Site Characterization Using the Cone Penetrometer Test", Olsen et al., First International Symposium on Penetration Testing, Mar. 20-24, 1988.
"Standard Test Method for Deep Quasi-Static, Cone and Friction-Cone Penetration Tests of Soil" ASTM D 3441-86.

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