http://worldcat.org/entity/work/id/137317655

Naval In-place Seafloor Soil Test Equipment: A Performance Evaluation

The Naval Civil Engineering Laboratory has developed a vane shear and cone penetrometer apparatus capable of obtaining the in-place undrained shear strength of sediments to a depth of 10 feet in the seafloor. The device is a subsystem of the Deep Ocean Test In-Place and Observation System (DOTIPOS). Information obtained with this equipment will enhance the Navy's ability to design foundations more economically and reliably for seafloor installations. The results of tests performed at 100- and 600-foot deep sites and the evaluation of DOTIPOS and the vane shear and cone penetrometer apparatus are presented. The DOTIPOS-mounted vane shear and cone penetrometer apparatus operates satisfactorily to water depths of 600 feet and produces results which appear reasonable when compared to previous theoretical and laboratory experimental results. Laboratory and in-situ vane shear results are in reasonable agreement; however, the in-situ results exceed the laboratory results by 10 to 20 percent.

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