Accession Number:

AD0466091

Title:

DEVELOPMENT OF SOIL PRESSURE GAGES.

Descriptive Note:

Final rept.,

Corporate Author:

RENSSELAER POLYTECHNIC INST TROY NY WINSLOW LABS

Report Date:

1965-03-01

Pagination or Media Count:

137.0

Abstract:

This report describes a soil pressure measuring system which involves quick-freezing a zone of soil in the free-field, excavating a cavity in the frozen zone, suspending a triaxially sensitive pressure gage in the cavity, and surrounding the gage with a liquid which changes to an elastic solid before the solid thaws. An auxiliary procedure is determination of insitu soil stress-strain properties in thawed cavities carved from frozen zones surrounding the point at which future pressure measurement will be made. A triaxially sensitive spherical gage was developed and tested. Equipment for freezing a zone of soil was tested, and a cavity trimming tool was successfully used. Suitable room-temperature-vulcanizing silicone rubber compounds were formulated which would solidify in the frozen environment. A concept was developed, but not tested, for a device to perform the auxiliary determination of soil stress-strain properties. Also included in the report is a brief review of soil pressure measurement techniques. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE