Settling and Consolidation of Soft Mud–Sand Layers
Settling and Consolidation of Soft Mud–Sand Layers
复制标题
软泥砂层的沉降和固结
DOI：
10.1061/(asce)ww.1943-5460.0000483
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
R. Barth
中科院分区：
文献类型：
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作者：
L. Rijn;R. Barth
本文通过一组长度在0.5 ~ 3 m范围内的实验室沉降柱的试验，探讨了软质泥砂混合物的沉降固结问题。沉降柱中使用了两种含砂量不同的天然泥浆。此外，还测试了砂含量相对较高的泥砂混合物。简要解释了阻碍沉降和固结过程的理论，并提出了一个相对简单的模拟模型。将模型模拟结果与两个实验室试验结果进行了比较，实测值与计算值吻合较好。本文给出了干散体密度随粘土和沙子百分比的函数图，该图可用于估计从航道和港口盆地中疏浚的泥质层的原位密度。此外，还给出了一次固结过程的时间尺度图。
This paper discusses the settling and consolidation of soft mixtures of mud and sand based on experiments in a set of laboratory settling columns of varying lengths in the range of 0.5–3 m. Two types of natural muds with varying percentages of sand were used in the settling columns. In addition, mud–sand mixtures with relatively high percentages of sand were tested. The theory of the hindered settling and consolidation processes is briefly explained, and a relatively simple simulation model is proposed. The model simulation results are compared to the results of two laboratory tests with reasonably good agreement between measured and computed values. A plot of the dry bulk density as a function of the percentage of clay and sand is presented, which can be used to obtain an estimate of the in situ density of muddy layers to be dredged from navigation channels and harbor basins. Furthermore, a plot of the timescale of the primary consolidation process is presented.