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中文摘要：
通过分析直立堤前海床地貌和深度剖面方向贯入强度特性及相邻自由海床剖面方向贯入强度特性,研究了黄河口潮滩粉土体动力响应的非均匀性.研究发现：沿海床剖面不仅存在水平硬层,同时也存在竖直硬层,且竖直硬层与水动力条件有关.结合现场循环冲击荷载试验和直立堤前多孔介质海床数值模型,解释粉土海床非均匀性形成的机制：由于粉土体中细小无黏性颗粒在波浪作用下逐渐脱离土骨架,在土体中缓慢流动汇聚,在后期波浪改造累积作用下固结排水强度增大,形成强度不同的地带,导致土体动力响应的非均匀性.
英文摘要：
Based on the investigation of the strength characteristics of seabed in front of a bank and nearby area in a section scale, the dynamic response of silt seabed was studied in the Yellow River estuary beach. It was found that the relative hard strata not only formed horizontally but also vertically; and the vertical stratum has a relationship to the hydrodynamics. Through the impact loading and model analysis, a conclusion is drawn as follows： the formation of seabed sediment consolidated inhomogeneity is due to the fine particles flow under wave loading, when the fine particles accumulate, the sediments will become harder for the perspiration of pore water pressure; thus result in the inhomogeneity of silt seabed.
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