Soil compaction measurement

Details Soil compaction measurement Soil compaction measurement

2005-07-05

2005-07-05

Williams, Hezron (Department: 2856)

Measuring and testing

Vibration

Hardness or compliance

C073S784000, C073S594000

Reexamination Certificate

active

06912903

ABSTRACT:
An apparatus and method are provided for the in-situ measurement of the stiffness of a layer of soil or other surface of interest. The apparatus includes a contact foot for engaging the surface and a drive transducer coupled to the contact foot for applying a vibratory force to the contact foot in response to a drive signal. A motion sensor is coupled to the contact foot and in a preferred embodiment an additional sensor measures the force applied to the contact foot and hence to the surface. These sensors generate corresponding output signals. The output signals are used to generate a measurement signal that is representative of the surface stiffness.

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