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结合紫坪铺、瀑布沟和密云土石坝工程，在大型动三轴试验机上（试样尺寸为φ300×750mm），通过往返加荷三轴试验，研究了堆石料和砂砾石料在非饱和状态、饱和排水状态及饱和不排水状态下的残余变形特性，探讨了粗位主料的密实度、饱水程度、排水条件、初始应力条件及往返加荷条件等对其残余变形特性的影响，并进行了对比分析，得出了一些有工程实用意义的结论。这些研究成果，可作为紫坪铺、瀑布沟和密云土石坝工程进行抗震设计和地展变形分析的基本依据，对其它工程也有重要的参考价值。
Combined with the Zipingpu, Pubugou and Miyun earth-rock dam project, the rockfill materials and gravel materials were studied in a non-saturated state on a large-scale moving triaxial testing machine (sample size: φ300 × 750mm) Saturated drainage and saturated undrained state of the residual deformation characteristics of the coarse material density, the degree of saturation, drainage conditions, the initial stress conditions and the impact of the roundtrip loading conditions on the residual deformation, and carried out The comparative analysis, come to some conclusions of engineering practical significance. These research results can be used as the basic basis for seismic design and deformation analysis of Zipingpu, Pubugou and Miyun earth-rockfill dam projects, and also have important reference value for other projects.