在对国内外主应力轴旋转情况下土的各向异性理论研究进行对比和总结的基础上,提出了一种研究不同加载方向土的各向异性屈服面的新方法。并以关口—太田模型为例,推导出轴对称情况下不同加载方向时土体屈服面所满足的方程式,进而在p–q空间中绘制出加载角度变化时一系列关口—太田模型屈服面的图形。本文成果对从理论上研究各向异性屈服面的性状具有一定的价值。 Based on the comparison and summary of the theoretical research on anisotropy of soil under the rotation of main stress axis at home and abroad, a new method to study anisotropic yield surface in different loading directions is proposed. Taking the guantou-Otai model as an example, the equations of soil yielding surface under different loading directions under axial symmetry are deduced, and then a series of guages ​​- the yield surface of the Ota model Graphics. The results of this paper have certain value in the theoretical study of anisotropic yield surface traits.