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In Situ Geotechnical Investigation of Nearshore Sediments with Regard to Cross-Shore Morphodynamics

机译：考虑跨岸形态动力学的近岸沉积物原位岩土工程研究

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Sediment dynamics cause continuous changes in nearshore morphology and play a major role in coastline evolution as well as for engineering activities in the coastal zone. A portable, free-fall penetrometer was used to investigate the geotechnical characteristics of surficial seabed sediments in the energetic nearshore zone of the U.S. Army Corps of Engineers Field Research Facility at Duck, NC. Penetrometer deployments were carried out along four cross-shore transects in water depths of 0.8-14.3 m. Duplicate deployments demonstrated the reproducibility of the results. The derived maximum quasi-static bearing capacities ranged from 8.7-251 kPa, with a decrease in the qsbc and in the scatter in the seaward direction. Significant differences in sediment strength were observed in the vicinity of the actively migrating, shore parallel sandbar. The study shows a strong relationship between geotechnical characteristics and active morphodynamics of the nearshore seabed. The depth of closure was reflected in the penetrometer results.
机译：沉积物动力学导致近岸形态不断变化，并在海岸线演变以及沿海地区的工程活动中发挥重要作用。在北卡罗来纳州达克市，美国陆军工程兵野外研究设施高能近岸带的便携式海面渗透仪用于调查表层海底沉积物的岩土特征。渗透仪的部署是在水深为0.8-14.3 m的四个跨岸样带上进行的。重复部署证明了结果的可重复性。推导的最大准静态承载能力在8.7-251 kPa的范围内，qsbc和向海方向的散布都减小了。在活跃迁移的海岸平行沙洲附近，观察到了沉积物强度的显着差异。研究表明，岩土工程特征与近岸海底活动形态动力学之间存在密切关系。渗透深度的结果反映了封闭的深度。

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