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首页> 外文期刊>Engineering Geology >Rapid consolidation characteristics of Yellow River-derived sediment: Geotechnical characterization and its implications for the deltaic geomorphic evolution
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Rapid consolidation characteristics of Yellow River-derived sediment: Geotechnical characterization and its implications for the deltaic geomorphic evolution

机译：黄河衍生沉积物的快速整合特征：岩土表征及其对红细胞地貌演变的影响

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摘要

The Yellow River, which presently discharges into the western Bohai Sea, has been widely recognized as having one of the highest sediment loads on Earth. Understanding the consolidation characteristics of Yellow River-derived sediments is critical for improving our knowledge of the riverine sediment transport, depositional processes, and evolution of the Yellow River Delta morphology. In this study, we conducted in situ experiments from 2004 to 2008 at an abandoned subaqueous delta lobe (Diaokou lobe) in order to investigate the consolidation process of the sediments. Our results show that the initial consolidation of Yellow River-derived sediment is a rapid process when the excess pore-water pressure caused by sediment aggradation can completely dissipate in similar to 1500 min. The change in the physical and geotechnical properties during the consolidation endows the sediments with a certain shear strength. However, due to the hydrodynamic conditions, the distribution of the sediment strength is both temporally and spatially inhomogeneous. Furthermore, a hard layer can develop at the depths of 10-30 cm and the adjacent layer can become a potential sliding surface. This study offers some insight into the formation and evolution processes of the Yellow River Delta's sedimentary and geomorphic forms.
机译：将当前排放到西渤海的黄河已被广泛认可为地球上具有最高沉积物之一。了解黄河衍生沉积物的整合特征对于提高我们对河流沉积物运输，沉积过程和黄河三角洲形态的演变的了解至关重要。在这项研究中，我们在原地实验于2004年至2008年在一个废弃的亚水δ（Diokou Lobe）上进行，以调查沉积物的整合过程。我们的研究结果表明，黄河衍生的沉积物的初始整合是一种快速的过程，当沉积物的过量孔隙水压力造成的过量的孔隙水压力可以完全消散在类似于1500分钟。整合过程中物理和岩土性特性的变化赋予沉积物以一定的剪切强度。然而，由于流体动力学条件，沉积物强度的分布在时间上和空间上不均匀。此外，硬层可以在10-30cm的深度下显影，并且相邻层可以成为电位滑动表面。本研究提供了对黄河三角洲沉积和地貌形式的形成和演化过程的洞察。

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