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土坡稳定问题的塑性极限分析法与惯用的极限平衡分析法不同的是它考虑了土的应力——应变关系,属土坡稳定分析的新技术。本文较全面地介绍了近年来塑性极限分析在土坡稳定方面的应用。阐述了塑性极限分析的基本原理并在此基础上获得了直线破裂面、对数螺旋破裂面均质土坡的临界高度的上限解,以及各向异性、非均质土坡的临界高度的上限解。文中介绍的稳定系数用表可供实际工程参考采用。
The difference between the plastic limit analysis method for soil slope stability and the conventional limit equilibrium analysis method is that it considers the stress-strain relationship of soil and is a new technology for the stability analysis of soil slopes. In this paper, the application of plastic limit analysis in the stability of soil slope in recent years is introduced comprehensively. The basic principle of the plastic limit analysis is expounded, and on this basis, the upper bound solution of the critical height of the homogeneous soil slope of the straight rupture surface and the logarithmic spiral rupture surface is obtained, and the upper limit of the critical height of the anisotropic and heterogeneous soil slope is obtained. solution. The table of stability factors introduced in this article can be used as reference for practical engineering.