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中文摘要：
采用大型三轴试验机，对粗粒料进行了常规三轴、等p和等应力比等不同应力路径的试验。通过对试验结果进行对比分析，研究了粗粒料在不同应力路径下的应力-应变、变形和强度特性，并对粗粒料的卸载体缩现象进行了分析和探讨。结果表明，应力路径对粗粒料的应力-应变和变形特性影响较大，而对强度特性影响较小；卸载体缩主要是由偏应力比η的变化所引起的，与应力路径关系很大。
英文摘要：
A series of large-scale triaxial tests under different stress paths are performed, including the conventional triaxial tests, constant p tests and constant stress ratio tests. Based on the comparison of test results, the stress-strain, deformation and strength characteristics of a coarse-grained material under different stress paths are investigated. Meanwhile, the phenomena of the volume-contraction in unloading is discussed. The test results indicate that the stress path has obvious influence on the stress-strain and deformation characteristics of the coarse-grained material, but little influence on strength characteristics. The volume-contraction in unloading of the coarse-grained material is caused by the change of deviatoric stress ratio and is related to stress path of test.
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