Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Free fall penetrometer: a performance evaluation
Abstract The application of a free fall penetrometer for determining the in situ shear strength properties of marine sediments is discussed. The penetrometer is instrumented with three sensors for measuring the acceleration/deceleration, cone thrust and local side friction simultaneously and continuously. The instrument is simple and fast in operation (the entire operation of deploying, testing and retrieving the instrument takes only 20 minutes) and may prove to be a useful ground truth equipment for deep toe acoustic surveys. Recent trials offshore Newfoundland are discussed. Preliminary field test results indicate that with this system the dynamic strength profile, the soil type and the location and depth of different stratigraphic layers can be directly evaluated up to penetrated depths. A procedure is outlined for estimating the static strength profile from the dynamic strength profile by applying the correction for penetration rate effects. The penetrometer developed to date is capable of penetrating to a maximum depth of about 4 m but, in the future, it may be possible to obtain soil profiles to a depth of approximately 15 m (50 ft) with some modifications in the instrument design.
Free fall penetrometer: a performance evaluation
Abstract The application of a free fall penetrometer for determining the in situ shear strength properties of marine sediments is discussed. The penetrometer is instrumented with three sensors for measuring the acceleration/deceleration, cone thrust and local side friction simultaneously and continuously. The instrument is simple and fast in operation (the entire operation of deploying, testing and retrieving the instrument takes only 20 minutes) and may prove to be a useful ground truth equipment for deep toe acoustic surveys. Recent trials offshore Newfoundland are discussed. Preliminary field test results indicate that with this system the dynamic strength profile, the soil type and the location and depth of different stratigraphic layers can be directly evaluated up to penetrated depths. A procedure is outlined for estimating the static strength profile from the dynamic strength profile by applying the correction for penetration rate effects. The penetrometer developed to date is capable of penetrating to a maximum depth of about 4 m but, in the future, it may be possible to obtain soil profiles to a depth of approximately 15 m (50 ft) with some modifications in the instrument design.
Free fall penetrometer: a performance evaluation
Dayal, Umesh (Autor:in)
Applied Ocean Research ; 2 ; 39-43
10.08.1979
5 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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