路基软基处理方案优选的区间层次决策

Interval hierarchy optimization decision for soft ground improvement scheme

针对传统决策方法在评价指标量化和权值确定时主观性较强、误差较大的问题,综合运用区间数学理论法、层次分析法和区间关联分析法,建立了软土路基处理方案优选的区间层次决策法。通过对某工程软基处理方案进行优选,计算各方案的隶属度,得出各方案的优劣次序。研究结果表明:与模糊相似优先比等方法计算结果进行对比,优选结果一致;区间层次决策法充分考虑了主观判断的不确定性,将评价指标值和权值区间化,大大提高了决策精度,为路基软基处理方案决策提供了一种新方法。

Aimed at the strong subjectivity and the big error of the evaluation index quantization and the weight decision of traditional decision methods,the interval hierarchy decision method was set up to optimize the soft ground improvement scheme by comprehensively applying the interval mathematics theory,the analytic hierarchy process and the interval relative analysis method.Taking a project for example,the order of the various programs was got by calculating the degree of membership.The results show that comparing with the other methods,the interval hierarchy decision can give a full consideration to the uncertainties of subjective judgement,the interval evaluation index value and the interval weight can greatly improve the decision accuracy,it provides a new method for soft ground treatment decision.