察汗乌苏水电站坝基覆盖层土料的动强度特性

通过大型与中型动三轴试验，对新疆察汗乌苏水电站混凝土面板堆石坝坝基土料动强度与动孔压特性进行了试验研究。根据试验结果和以往成果中坝基动剪应力比分布规律初步估计，在该工程给定的地震设计烈度条件下，该坝基覆盖层可以满足建坝要求，不会发生液化破坏。研究成果可为深厚覆盖层地基上高土石坝的抗震稳定性计算和安全性评价提供科学依据，为深厚覆盖层工程特性的进一步研究提供参考。

The dynamic soil strength properties on the overburden layers of dam foundation of Chahanwusu Hydropower Project

This paper describes a series of experimental study results for the dynamic strength and pore water pressure properties of soil materials of the overburden layers of dam foundation in Chahanwusu hydropower project under the vibratory actions with large and middle scale cyclic tri-axial testing machine. According to these results and distributive law of dynamic shear stress ratio in dam foundation, it can be preliminarily estimated that the dam foundation overburden layers will not present failure state owing to the seismic liquefaction under the design ground motion These results may provide the scientific bases for dynamic deformation analysis and safety estimation of high earth and rockfill dam on deep overburden layers foundation, also provide a reference for further research of project properties on deep overburden layers.