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深基坑支护方案的遴选是一个复杂的系统工程,其中涉及到技术可靠性、造价、环境影响和工期等诸多指标因素。采用传统模糊层次分析法(FAHP)评价深基坑方案的过程中,主观权重的确定存在一定的随意性。为了克服这一缺陷,引用信息熵所反映指标本身的效用值来修正主观权重,建立了一种综合评价体系。该体系系统地考虑了指标的客观因素和主观因素,使权重的确定更加合理,最后通过实例验证了该评价体系的合理性和可靠性。
The selection of deep foundation pit support scheme is a complex systematic project, which involves many indicators such as technical reliability, cost, environmental impact and construction period. In the process of using traditional fuzzy analytic hierarchy process (FAHP) to evaluate the plan of deep foundation pit, the determination of subjective weight has some randomness. In order to overcome this defect, we use the utility value of the indicator itself reflected by the information entropy to correct the subjective weight, and establish a comprehensive evaluation system. The system systematically considers the objective and subjective factors of the indicator and makes the determination of the weight more reasonable. Finally, the rationality and reliability of the evaluation system are verified through examples.