考虑应力场与渗流场耦合的尾矿坝非稳定渗流分析

根据尾矿坝形成的特点，进行考虑应力场与渗流场耦合的非稳定渗流分析。根据弹性力学和渗流理论提出了耦合问题的力学模型及其控制微分方程，然后导出这一问题的有限元计算公式及相应程序。在计算中首次导出了尾矿坝的渗透系数与应力场的关系式，并进行尾矿坝的非稳定渗流分析。工程实例计算结果表明，考虑耦合作用的影响，尾矿坝渗流场的总渗流量减小，而应力场的各应力分量的最大值增大。     

石灰改良高液限土路用性能的试验研究

针对高液限土的特点,采用掺入不同剂量生石灰进行高液限土的改良试验,研究其物理力学性质和强度变化规律.采用室内试验的方法,确定了石灰的最佳掺量.研究结果认为,高液限土经掺入6%的生石灰改良处治后,路用性能良好,可用于高速公路的路基填料.     

A new technique of combining accretion by cyclone separator and scattertube for tailings dams

A new technique of combining accretion by cyclone separator and scattertube for tailings dams was devel-oped according to laboratory experiment, model experiment and spot experiment technology. Three tailings dams were successfully constructed by the new technique. The results of engineering geological exploration, static and dy-namic test and stability analysis on Baizhishan tailings dams prove that the new technique improves structure and sta-bility of the dams and working conditions compared with the traditional technique. The thin layers of fine-grained soils are greatly reduced, fine tailings sand is solid to make the dam stable and seepage conditions are well improved,the immersing line of the dam descends. In addition, the stability and liquefaction resistance of tailings dams are strengthened remarkably. The interior stress is compressive stress, stress level of every element is less than 1.0 and safety coefficient of every element is greater than 1.0. The safety coefficient against liquefaction of every element of tailings dams is greater than 1.5 according to the analysis of seismic response by finite element method.