高尾矿坝的地震液化和稳定分析

本文采用静力有限单元法和动力有限单元法,考虑到尾矿材料的静力非线性和动力非线性,分析了德兴铜矿4号高尾矿坝的静应力和动应力,然后根据尾矿的动三轴液化试验资料,分析了该坝在8度、9度地震时的液化情况和地震稳定性,并推断当7度地震时可能发生的情况。 文中对于地震产生的孔隙水压力作了近似分析,并对坝体在地震作用下的稳定性作了一般性分析。

Liquefaction and Stability Analysis of a High Tailing Dam under Earthquake Excitation

In this paper the seismic stability of No. 4 tailing dam at Dexing Copper Mine is studied. Both static and dynamic response analyses have been carried out using nonlinear finite element technique. In these analyses the experimental data obtained from laboratory triaxial test of tailing meterials and two bed rock accelerographs recorded during Tangshan and Songpan earthquakes and scaled to the maximum accelerations of 200 and 400 gal respectively were used.In addition, a simplified method of evaluating the earthquake- induced pore pressure is given to predict the liquefaction potential of soil elements in the various parts of dam.