Application of fuzzy analysis in optimization deep escavation support schemes

In this paper according to characteristics of supporting works for deep excavation,an index system for supporting version was established.A one level fuzzy evaluation model was formed with fuzzy mathematical method.The uncertainty of the index factors was quantified.The fuzzy complex evaluation method is applied to evaluating the superior and inferior degree of the bracing system schemes for the deep excavation,and then the optimum scheme is obtained.