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根据2004年4月至2009年6月在黄河口潮坪进行的长期现场观测试验结果,研究了黄河泥沙沉积后的固结过程。研究发现:入海泥沙沉积后,强度呈线性增长,孔隙水压力消散曲线符合指数模型,5 d内固结基本完成呈现似超固结状态,沿深度方向强度出现分层现象,并逐渐非均匀化。沉积后的泥沙在自重应力和海洋水动力的长期作用下,土体的强度呈现增长–降低–增长的趋势,沿深度非均匀性提高。首次揭示了黄河入海泥沙的快速固结特性及形成的沉积物强度随时间与空间的非均匀性变化规律。
According to the results of long-term on-site observation conducted at the tidal flat of the Yellow River estuary from April 2004 to June 2009, the consolidation process of the Yellow River sediment after sedimentation was studied. The results show that the strength of sediment increases linearly after sediment deposition, and the pore water pressure dissipation curve accords with the exponential model. The consolidation within 5 days is almost overconsolidated, and the strength along the depth is stratified. The Sediment sediment in the long-term role of gravity stress and ocean hydrodynamics, the soil strength showed a growth-decrease-increase trend along the depth of non-uniformity increased. For the first time, the rapid consolidation characteristics of sediment entering the Yellow River and the variation of sediment intensity with time and space are revealed.