地铁深基坑支护方案优选的模糊概率方法

根据地铁深基坑支护工程的特点,建立了支护方案评价的指标体系,并将模糊概率理论与层次分析法(AHP)相结合,构造了地铁深基坑支护方案优选的模糊概率综合评价模型。在此评价模型中,提出了模糊权重的概念,可充分考虑权重的模糊性,避免了传统方法在权重取值上的局限性。实例分析表明,该模型概念清晰,理论严密,计算简单,适用范围广,且评价结果客观可靠,为工程决策者提供了一种科学有效的评价方法。

Fuzzy probability model of supporting scheme for deep foundation pit of metro and its application

According to characteristics of bracing engineering for deep foundation pit in metro,an index system for supporting scheme was established.Using the theory of fuzzy probability and analytic hierarchy process(AHP),the paper constructed a comprehensive assessment to optimize supporting scheme for deep excavation of metro.In order to assess the index weights scientifically,the fuzzy weighted value was proposed to avoid the limitation while determining the index weights.The practical example,with 4 supporting schemes for deep foundation pit of metro in Guangzhou,was introduced and compared to the results obtained by other methods.The method is based on clear concept and rigorous theories,and can be applied extensively to obtain objective and dependable result for the managers of civil engineering.