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Solutions to estimate the excess PWP, settlement and volume of draining water after slurry deposition. Part II: pervious base
Environmental Earth Sciences ( IF 2.8 ) Pub Date : 2020-06-03 , DOI: 10.1007/s12665-020-09014-2
Jian Zheng , Li Li , Yu-Chao Li

It is a critical concern to properly manage the risks associated with the stability of tailings and dredge sludge dams. This requires the knowledge of the pore water pressure (PWP) within a slurried material during and after the deposition. The evaluation of the PWP can also help to estimate the settlement, which is important for the water management and design of the storage facility. An analytical solution based on the Gibson model has been proposed by the authors to evaluate the excess PWP during the slurry deposition. However, there is no solution available to estimate the excess PWP and volume of draining water after the end of slurry deposition. In this paper, a new solution is proposed to evaluate the PWP, settlement, and volume of draining water after the slurry deposition on a pervious base. The proposed PWP solution is partly validated by numerical modeling with SIGMA/W and laboratory results. The influence of the consolidation coefficient and filling rate on the distribution and evolution of PWP is analyzed. The solution development for estimating the excess PWP, volume of draining water and settlement after slurry deposition on an impervious base has been presented in a companion paper (part I).

中文翻译:

估算浆液沉积后多余的PWP,沉降和排水量的解决方案。第二部分:前期基础

妥善管理与尾矿和疏edge污泥坝的稳定性有关的风险是至关重要的问题。这需要了解沉积过程中和沉积后的浆状材料中的孔隙水压力(PWP)。对PWP的评估还可以帮助估计沉降,这对于水的管理和存储设施的设计很重要。作者提出了一种基于Gibson模型的分析解决方案,以评估浆料沉积过程中过量的PWP。但是,没有解决方案可用来估计浆液沉积结束后的多余PWP和排水量。在本文中,提出了一种新的解决方案来评估浆液在透水基体上沉积后的PWP,沉降和排水量。所提出的PWP解决方案已通过SIGMA / W的数值建模和实验室结果得到了部分验证。分析了固结系数和填充率对PWP分布和演变的影响。在随附的论文(第一部分)中介绍了用于估计过量PWP,排泄水量和在不透水的基础上进行浆料沉积后沉降的解决方案。
更新日期:2020-06-03
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