针对我国实施“一带一路”倡议及“海洋强国”战略中遇到的粗细粒混合料场地上重大工程数量快速增长的现实状况，如何科学地考虑地震场地效应影响并建立有效的粗细粒混合料地震液化评价方法，已成为地震工程领域急需解决的科学问题。基于基本物理性能指标及剪切波速试验，结合已有试验数据及研究成果，建立表征全细粒含量范围（FC=0~100%）的粗细粒混合料颗粒接触状态的改进二元介质模型。通过不排水循环加载试验，探明模拟地震引起的循环加载条件下饱和粗细粒混合料的液化或失效物理机理，揭示材料特性、密实状态等因素对混合料液化强度的影响规律；基于改进二元介质模型，提出液化强度与剪切波速的归准化量化方法，并将室内试验数据转换到现场条件，建立基于液化强度与剪切波速相关关系的液化触发临界线，提出基于基本物理性能指标的各类混合料地震液化评价的通用方法。预期研究成果可应用于各类混合料场地的地震液化评价与减轻震害设计。

With the development of “The Belt and Road Initiative” and “Marine Potestatem”, large-scale infrastructure projects constructed in coarse-fines mixture deposits are threatened by strong earthquakes, representing a major engineering challenge. It is one of the key and urgent scientific issues in the field of earthquake engineering to develop the triggering assessment procedure of seismic induced liquefaction of saturated coarse-fines mixtures for considering the influence of seismic site effects on the infrastructure. Based on the basic index property testes and the measurement of shear wave velocity along with the published test data and existing research results, an improved binary packing model is established to characterize the particle contact state of the coarse-fines mixtures with fines contents FC ranging from 0 to 100%. Based on the results of undrained cyclic triaxial tests, the physical mechanism of liquefaction or failure of saturated coarse-fines mixtures under cyclic loading conditions associated with earthquake events are revealed, and the influence of material properties, physical state and other dominant factors on the liquefaction resistance of the mixtures are determined. Based on the improved binary packing model, the normalized quantitative method of liquefaction resistance and corrected shear wave velocity are proposed, the liquefaction triggering curves for the correlation between liquefaction resistance and shear wave velocity are characterized by the data conversion between the laboratory testing conditions and the field conditions. The proposed procedure provides a simple, rapid and economical with less uncertainty advantage in the evaluation of liquefaction potential of coarse-fines mixtures which only involves intrinsic index properties of the mixtures. Extensive application can be anticipated in assessing seismic liquefaction potential and mitigating seismic damage for coarse-fines mixture deposits.