ENVIRONMENTAL EFFECTS ON ENGINEERING PROPERTIES OF DEEP OCEAN SEDIMENTS.
Final rept., 15 Nov 65-15 Nov 66,
IIT RESEARCH INST CHICAGO ILL
Pagination or Media Count:
The environmental effects of the deep ocean were investigated in consolidation, direct shear, and vane shear tests on four ocean bottom sediments. Tests were performed in sea water environment within pressure chambers to create hydrostatic environmental pressures up to 10,000 psi. The pressure chambers were also refrigerated to provide the required 1 to 3C environmental temperature. The direct shear tests indicated that there was a decrease in shear strength with increased environmental pressures for fine grained soils at high void ratios. The vane shear tests showed an increase in shear strength with an increase in environmental pressure for the more plastic soil and a decrease in strength with an increase in environmental pressure for the less plastic soil. The consolidation tests showed no effects that could be attributed to the environmental conditions. However, the apparatus was not sensitive enough to measure effects on loose sediments under small loads. Such effects might be expected to occur based on the shear test results.
- Physical and Dynamic Oceanography