基于三轴试验的非饱和土抗剪强度影响因素分析

摘要

Existing research results show that water content and dry density and other physical indicators have great influence on the shear strength of unsaturated soils ,therefore,it is necessary to investigate variation of shear strength of unsaturated soils with water content and dry density by experiment .By triaxial shear test ,carried out experimental test on remolded unsaturated soils ,controlling water content and dry density ,the test results show that water content and dry den-sity is an important factor on shear strength of unsaturated soil ,the optimum water content content and maximum dry den-sity is the critical point of mutual transformation about stress -strain relationship .%已有的研究成果表明，含水量和干密度等物性指标对非饱和土的抗剪强度具有较大的影响，因此，有必要从试验的角度探讨含水量和干密度对非饱和土的抗剪强度的影响规律。通过三轴剪切试验，开展了控制含水量和干密度的重塑非饱和土的试验测试，试验结果表明，含水量和干密度是影响非饱和土抗剪强度的重要因素，最佳含水量和最大干密度是应力－应变关系相互转化的临界点。