Abstract：Based on the random field modeling of soil profile and the Bishop routine solution，the stability reliability of a practical complex slope behind waterproof wall is studied. By JC method，the reliability index of different improvement plan for soft foundation is respectively calculated. The influence of probabilistic property and cross-correlativity of soil properties on reliability index is analyzed. From the results of static cone penetration test，the self-correlation distance of and is estimated，and the influence of on slop stability reliability is investigated. The developed computer program on reliability of the complex slope stability is worked out and some valuable conclusions are drawn.
