In-Situ Pore-Pressure Measurements for a Detailed Geotechnical Assessment of Marine Sediments: State of the Art

TL;DRAbstract

The purpose of sampling and geotechnical testing of marine sediments is to ascertain and predict their in-situ properties. For many applications, limitations in accuracy imposed by the sampling and testing procedures may not be critical. However, for the safe disposal of some toxic wastes, there is a requirement for higher degrees of precision and reliability in the determination of some pertinent parameter. For waste products that are to be buried in marine sediments, and where the sediments themselves provide a geologic barrier to the release of waste products into the oceans, it is essential to determine accurately the flow regime of the natural pore waters. Furthermore, it may be desirable to monitor any changes that occur in the flow regime after emplacement. In-situ measurement of pore-water pressure and permeability is possibly the simplest, most reliable, and perhaps the most accurate technique for determining the rate of pore-water advection in marine sediments. Experience of

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