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文章从黄河上游中型电站坝基红层沉积的岩相古地理处理、岩石特征、物理力学性质、水理性质以及抗风化能力等方面入手,分析了红层的工程特性及建坝存在的主要工程地质问题,探讨了适应红层特点的设计对策和处理措施。 相似文献
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Based on the characteristics and reinforcement mechanism of vacuum preloading applied in high way soft foundation, the theoretical calculation method of vacuum preloading was presented. According to the equivalent method derived from sand drain foundation subjected to plane and axisymmetric conditions, the three dimensional problem was transformed into plane strain problem. The modified Komala-Huang model was used to model the rheological behavior and the damage theory was also introduced to consider the effect of damage caused by construction disturbance. Numerical simulations were carried out for a high way test section. The results show that simulations of the viscoelastic-plastic-damage model are in good agreement with the field measurements. It suggests that the calculation method, simplified load and boundary condition used in this study are reasonable. 相似文献
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对HPF (湿式氧化法)焦化脱硫废液在蒸发浓缩时冷凝液中COD (Chemical Oxygen Demand,化学需氧量)的分布规律及影响因素进行了考察。结果发现,在脱硫废液的蒸发浓缩处理过程中,冷凝液中的COD呈先减小后增大的变化趋势,在初期和末期冷凝液中的COD均高达10000mg/L以上,引起这种现象的物质在前期主要是酚类与含氮类等有机物,在后期主要是废水中分解产生的无机物。如何有效去除废水中的有机物及控制脱硫废液浓缩时的温度是降低其冷凝液中COD的关键。 相似文献