不同固结度尾矿泥动强度的试验和推求

Experiment and Inquire into the Dynamic Strength of Tailings Mud with Different Degree of Consolidation

饱和尾矿泥不同固结度和各种固结比条件下的固结不排水振动三轴试验,不但工作量大,而且由于尾矿泥很软,强度很低,难以进行高固结比试验。在总结了Kc=1.0、1.5、2.0,完全固结条件动强度试验规律基础上,采用适度外延方法,推导出不同固结度各种固结比下的动应力σd和动力抗剪强度指标Cd、Φd。该方法解决了特软尾矿泥难以承受高应力、无试验资料的难题,可供确定各类软土动力参数参考。

Consolidated undrained dynamic triaxial test of the saturated tailings mud under different degree of co- nsolidation and consolidation ratio conditions, is not only doing many work, but also very difficult to carry out a test of the high consolidation ratio because the tailings mud is very soft and its low strength. Based on the dynam- ic strength test law of K c=1.0, 1.5, 2.0 under pure consolidation conditions, the author adopted the method of the suitable extension and gained the dynamic stress σd under different degreet of consolidation and the consolidation ratio and the index C d, Φ d of the dynamic strength. This method has settled the problem that the soft tailings mud can't bear the high stress and gained the test result. The method of this paper may be used for determining all kin- ds of the soft soil dynamic parameters.