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A Laboratory Investigation of Lateral Stresses During Consolidation of San Francisco Bay Mud.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
Pagination or Media Count:
Three-dimensional stress-strain measurements provide valuable insight into the behavior of sensitive clays during consolidation. Incorporating the ideas of those researchers who have previously measured lateral stresses in clays during consolidation, a new oedometer was designed and constructed specifically to measure lateral stresses in sensitive San Francisco Bay Mud. The new oedometer was evaluated and found to be an acceptable and inexpensive alternative to costly off-the-shelf lateral pressure devices. The results of three tests on San Francisco Bay Mud are analyzed by examining stress paths and compression curves. A visible break on the stress paths occurs ssimultaneously with the sharp break on the arithmetic compression curve, indicating a collapse of the sensitive clay structure. The pressure at which this break occurs is taken to be the yield stress of the clay. The test results are compared with various other methods for determining the yield stress in clays. MM
APPROVED FOR PUBLIC RELEASE