The large-scale triaxial consolidated-drained (CD) and consolidated-undrained (CU) shear tests were carried out to investigate performances of the sericite quartz schist coarse-grained soil on stress-strain, deformation, and strength under four different confining pressure conditions. The test results indicated that the stress-strain curve of sericite quartz schist was nonlinearity, compressive hardening and elastic-plastic. The shear strength envelope curve was better. In the triaxial CD shear test, the sericite quartz schist exhibited weak strain softening under different confining pressures. The sample showed shearing shrinkage at first and later dilatancy under confining pressures of 200, 400, and 600 kPa. When the confining pressure was 800 kPa, the sample showed a trend of shearing shrinkage. In the triaxial CU shear test, the sericite quartz schist exhibited strain hardening, presenting a tendency of shearing shrinkage at first and later dilatancy. It is more reasonable to take account of the cohesion of sericite quartz schist in practical engineering design by linear-regression analysis.

进行了大型三轴固结排水和固结不排水（CU）剪切试验，研究了绢云母石英片岩粗粒土在四种不同围压条件下的应力应变，变形和强度性能。 。试验结果表明，绢云母石英片岩的应力应变曲线为非线性，压缩硬化和弹塑性。剪切强度包络曲线更好。在三轴CD剪切试验中，绢云母片岩在不同的围压下均表现出较弱的应变软化。样品在200 kPa，400 kPa和600 kPa的围压下，在最初和随后的剪胀时均显示剪切收缩。当围压为800kPa时，样品表现出剪切收缩的趋势。在三轴CU剪切测试中，绢云母石英片岩表现出应变硬化，在初剪和后剪胀时呈现剪切收缩的趋势。通过线性回归分析，在实际工程设计中考虑绢云母石英片岩的内聚力更为合理。