SYMPOSIA PAPER Published: 01 January 1988
STP29085S

Triaxial Testing of Marine Sediments with High Gas Contents

Source

Gas types, zonation present in marine sediments, the corresponding mechanism of bubble formation, and methods of performing traxial tests on gassy sediments are discussed. Gases (methane and hydrogen sulfide; methane gas predominates) may be found either in solution or in the bubble phase in the sediment. A method to estimate the amount of gas that theoretically comes out of solution is shown. The result of gas bubbles is a reduction in the bulk modulus of the pore fluid. The bulk modulus of a gas-water mixture decreases with incresing fluid pressure. Results of decreasing bulk modulus are shown to reduce the pore pressure increment per application of a load increment. Triaxial testing techniques are recommended when (1) gas is in solution, (2) gas is in the bubble phase, and (3) gas is still evolving.

Author Information

Rau, G
Humboldt State University, Arcata, CA
Chaney, RC
Humboldt State University Marine Laboratory, Trinidad, CA
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: D18
Pages: 338–352
DOI: 10.1520/STP29085S
ISBN-EB: 978-0-8031-5048-5
ISBN-13: 978-0-8031-0983-4