土体各向异性研究进展

Development of soil’s anisotropy study

综合论述了土体各向异性在土体本构理论发展的不同阶段的研究进展;详细介绍了国内外在各向异性研究中所采用的试验手段、研究方法、理论成果和应用情况;对具代表意义的重要成果作了比较详细的描述和分析。分析了原生各向异性和应力各向异性的区别与联系,认为土体材料的颗粒结构性是各向异性产生的根本原因,复杂的应力状态是各向异性产生的客观条件;强调了各向异性,尤其是应力各向异性在土体本构理论研究中的重要性,对以后各向异性研究方法提出自己的观点。

The development of the study on soil’s anisotropy during different decades of soil’s constitutive model is summarized. Test apparatus, study method, results and applications of anisotropy are also introduced. Difference and connection of soil’s inherent anisotropy and stress-induced anisotropy are compared. It is believed that the structure character of soil’s particle is the ultimate reason and the complex stress situation is the external conditions of soil’s anisotropy. It is emphasized that study on the anisotropy, especially on the stress-induced anisotropy, will play an important role in the study of soil’s constitutive model. Method of the anisotropy study in the future is suggested.