采用有限元法对条形均布荷载作用下硬壳层软土地基竖向附加应力进行数值模拟，得到了不同厚宽比及模量比时层间竖向附加应力系数，编制了表格以便查询；通过二元回归分析得到了厚宽比、模量比与层间竖向附加应力系数的近似函数关系；结合“等效深度”概念，推导了一个硬壳层软土地基竖向附加应力分布的计算公式，并通过实例验证了计算公式的有效性。

The distribution of vertical additional stress of soft soil foundation with upper hard crust under uniform strip load is numerically simulated by finite element method. Through the simulation, the coefficients of interlayer vertical additional stress with different ratios of crust thickness to load width and ratios of crust modulus to soft soil modulus are obtained, and tables with these coefficients are given for reference. Furthermore, an approximate function of these coefficients versus ratio of crust thickness to load width and ratio of crust modulus to soft soil is presented using binary regression analysis. Finally, a calculation formula for vertical stress of soft soil foundation with upper hard crust is deduced based on the concept of equivalent depth, and the validity of this formula is verified by case calculation.