摘要
从非饱和土的微观结构入手,提出并推导了土颗粒间毛细吸力引起的基质吸力与附加有效应力关系的近似解,并进一步得到了低饱和度非饱和土的抗剪强度公式。通过试验资料和理论分析验证了所推公式的合理性、正确性。最后分析了土颗粒半径差异、土体平均粒径大小对非饱和土强度的影响。
Based on the micromechanical structure, an approximate equation between the increase of normal stress and suction due to capillarity in unsaturated assemblies of unequal-sized spheres is proposed and derived; and then the shear strength of unsaturated soils in pendular stage is derived also. All the equations derived have been verified by experiments and theoretical analysis. At last, the effect of soil gradation on the shear strength of unsaturated soils is analyzed qualitatively.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第4期580-585,共6页
Rock and Soil Mechanics
