Influence of grading on the mechanical behaviour of Stava tailings
Influence of grading on the mechanical behaviour of Stava tailings
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DOI：
10.1680/geot.9.p.009
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发表时间：
2011-11
期刊：
影响因子：
5.8
通讯作者：
A. Carrera;M. Coop;R. Lancellotta
中科院分区：
文献类型：
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作者：
A. Carrera;M. Coop;R. Lancellotta
尾矿坝可能是脆弱的结构，而且往往容易液化。它们的组成材料相当特殊，具有人造的起源，它们的行为仍然没有得到很好的理解。本研究以Stava尾矿坝为例，对Stava尾矿坝的土壤进行了研究，该尾矿坝的结构在1985年遭受液化，造成了广泛的破坏。他们的行为的两个主要方面进行了研究：粉土和砂的百分比，构成土壤的力学行为的影响，和液化的敏感性，分析在临界状态框架内的行为。本文指出，随着粉土量的增加，在较高压力下，正常压缩线和临界州线的斜率和截距减小，直到观察到性状的反转，而在较低应力水平下，临界州线的位置改变，但斜率不变。这意味着，增加淤泥的影响...
Tailings dams can be fragile structures and too often they are subject to liquefaction. The material they are composed of is rather peculiar, having a man-made origin, and their behaviour is still not very well understood. The soil from the Stava tailings dams, structures that were subject to liquefaction in 1985 causing extensive destruction, was investigated in this study as an example of tailings. Two main aspects of their behaviour have been examined: the influence of the percentage of silt and sand that compose the soil on its mechanical behaviour, and the susceptibility to liquefaction, analysing the behaviour within a critical state framework. In this paper it is shown that, as the quantity of silt increases, the slope and intercept of the normal compression line and critical state line at higher pressures decrease until an inversion of behaviour is observed, while at lower stress levels the critical state line changes its position but not its slope. This means that the effect of adding silt on the...