Accession Number:

ADA090697

Title:

Borehole Shear Device Feasibility and Preliminary Studies

Descriptive Note:

Final rept.

Corporate Author:

DAMES AND MOORE LOS ANGELES CA

Personal Author(s):

• Sidey, Roger
• Marti, Joaquin
• Rodriguez, Luis
• White, Douglas

Report Date:

1980-08-01

Pagination or Media Count:

226.0

Abstract:

The present studies try to overcome the difficulties inherent to the determination of in-situ shear modulus of soils over the complete range of strains. A new apparatus is proposed the BSD Borehole Shear Device. It essentially consists of a self-boring cylinder which has the capabilities of expanding radially to recover the pre-existing horizontal stress levels in the soil and of rotating harmonically about its axis. This allows constructing the curve relating the secant modulus to the strain level, based on the field measurements of torque and rotation of the cylinder. The device is expected to work up to failure strains in non-gravelly soils down to depths on the order of 50 m.

Descriptors:

• *SHEAR PROPERTIES
• *SOIL MECHANICS
• *BOREHOLES
• *CYLINDRICAL BODIES
• *SOIL DYNAMICS
• STRESSES
• INTERACTIONS
• SOILS
• FAILURE(MECHANICS)
• COUPLINGS
• DRILLING
• DYNAMIC TESTS
• SOIL TESTS
• TORQUE
• ROTATION
• MEASURING INSTRUMENTS
• MATHEMATICAL ANALYSIS
• FEASIBILITY STUDIES
• STRESS TESTING
• ELASTIC PROPERTIES
• PROTOTYPES
• STRAIN(MECHANICS)

Subject Categories:

• Geology, Geochemistry and Mineralogy
• Soil Mechanics
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE