Book Description

Previous investigations of the alluvial deposits in the area of the valley floor at the Norman damsite indicated that the lower half of the deposit contained orgaic silts and clays. This investigation consisted of performing vane shear tests in one test hole and obtaining 5-in-dia fixed piston samples in a second test hole. The two holes were drilled approximately 10 ft. apart. The laboratory testing of the undisturbed piston samples included visual classification of the soils. The dinsity, moisture content, and Atterberg limits of the undisturbed samples were determined. Triaxial shear tests were performed using both sealed and fully drained tests on undisturbed soils, and drained tests on these same soils remolded at 0% relative consistency (liquid limit), then anisotropically consolidated to 63% relative consistency prior to shear testing. The purpose was to provide shear constants which represented a wide range of in-place soil moisture and density conditions. Proctor compaction and relative density tests were performed. Samples were also used for triaxial shear and one-demensional and floating ring consolidation tests. One sample of shale fragments was tested to determine the particle breakdown with compaction and the change in penetration resistance of the compacted fragments with wetting. One sample, representing a silty sand, was tested to give a preliminary evaluation of the cement content for the proposed soil-cement dam facing. (Author).