不同应力路径下红粘土的力学特性

红粘土的力学特性与土体中应力变化过程、应力状态有关，常规的直剪试验、三轴试验并不能真实地反映天然土层的初始应力状态、应力-应变和强度规律。采用不同应力路径试验以模拟土体在实际受荷过程中的应力．应变过程，结合试验结果分析了红粘土的力学特性。研究结果说明，在工程实践中应根据实际的受力情况、应力状态来确定相应的应力路径，以正确、合理地测定红粘土的力学参数。

MECHANICAL PROPERTIES OF RED CLAY UNDER DIFFERENT STRESS PATHS

Mechanical properties of red clay are related to stress variation and stress state. By using the conventional direct shear test and triaxial shear test,the original stress state,relationship of stress-strain and strength of natural clay can not be reflected actually. Instead,by adopting test with different stress paths,the stress and strain relationship of the real loading process is analyzed. The study results show that in an actual project,the stress paths should be determined according to load case and stress state so that the mechanical parameters of red clay can be measured correctly and reasonably.