摩尔-库仑屈服准则是岩土工程界广泛使用的准则,但其存在棱角奇异点给数值计算带来了困难。该文引入平面应变情况下与摩尔-库仑屈服准则精确匹配的D-P准则,将在其基础上的应力计算结果使用矢量和法进行边坡的安全系数计算。通过均质边坡和多地层边坡的稳定分析表明,基于摩尔匹配的D-P准则和M-C准则的安全系数很接近,且采用D-P准则的表达形式,克服了摩尔准则的数值奇异性问题。 The Mohr-Coulomb yield criterion is widely used in geotechnical engineering, but the existence of angular singularities presents difficulties in numerical calculation. This paper introduces the D-P criterion that exactly matches the Mohr-Coulomb yield criterion under plane strain, and calculates the safety factor of the slope by using vector sum method. The stability analysis of homogeneous slopes and multi-layered slopes shows that the safety coefficient of D-P criterion and M-C criterion based on Moore matching is very close, and the numerical singularity of Moore’s criterion is overcome by the expression of D-P criterion.