剪切速率对黏土不排水强度影响的试验研究

摘要

通过三轴试验和直剪试验，研究了剪切速率对于饱和黏土三轴不排水抗剪强度与固结快剪强度的影响。对于固结不排水三轴试验结果分析表明，随着剪切速率的增加，三轴固结不排水强度和内摩擦角不断增大；随着剪切速率的增加，固结直剪强度和内摩擦角不断减小；固结压力较小时，剪切初期速率对于应力应变关系的影响较小；固结压力较大时，速率的影响更显著。%This paper studied the influence of shear velocity on triaxial consolidated undrained shear strength and consolidated quick shear strength of saturated soft clay by triaxial test and direct shear test. The test results showed that the internal friction angle of triaxial consolidated undrained strength increases constantly and the internal friction angle of consolidated direct shear strength decreases gradually with the shear velocity increasing,the influence of early shear velocity on stress-strain curve is little with low consolidation pressure,while the velocity has a significant effect on the curve when the consolidation pressure is high.