【摘要】 合理反映堆石料的动力永久变形特性对于认识土石坝的地震永久变形特性以及推动土石坝抗震水平的提高具有重要意义,本文通过大量室内动力三轴试验,研究了堆石料在不同围压、固结应力和动应力条件下的动永久变形特性,试验结果表明,围压、固结应力以及动应力的大小对堆石料的动永久变形具有重要影响,随围压、固结应力以及动应力的增大,堆石料的动永久变形相应增大。基于上述试验结果,本文研究总结出反映堆石料动永久变形特性的经验公式,通过不同岩性堆石料的对比试验表明,该经验公式具有较好的适用性。更多还原

【Abstract】 The research on the dynamic permanent deformation properties of rockfill material helps to better understand the dynamic permanent deformation of earth-rock dam induced by earthquake,which in turn improves the aseismic level of earth-rock dam construction. The dynamic permanent deformation properties of rockfill material under different conditions of confining pressure,consolidation stress and dynamic stress are investigated using dynamic triaxial tests in the laboratory. The test results indicate that different loadings conditions have significant influences on the dynamic permanent deformation of rockfill material. The permanent deformation increases with the enlargement in confining pressure,consolidation stress and dynamic stress. Based on our test results,a theoretical formula is proposed for the computation of dynamic permanent deformation of rockfill material,and the given formula is validated using rockfill materials with different lithological characters.更多还原