改进的理想区间法在多级大坝变形评价中的应用

大坝变形是影响大坝安全的重要因素,变形评价是大坝安全综合评价的基础工作。鉴于传统的理想区间法多用于多指标单层次的环境质量评价中,对理想区间法进行了改进,即将理想区间法结合熵权法计算各层次各指标的权重,克服了理想区间法只能适用于单层次评价指标结构体系的缺陷,进而将其应用于多级大坝变形评价中。结果表明,改进的理想区间法能够较好地反映各坝段变形情况,与大坝实际变形情况相符,说明该方法可用于多级大坝变形评价。

Improved Ideal Interval Method and Its Application in Evaluation of Multi-level Dam Deformation

Dam deformation is an important factor for the safety of the dam, and deformation evaluation is a basic work of dam safety comprehensive evaluation. Traditional ideal interval method is used for the multi-index and single level environmental quality evaluation. This paper improved the ideal interval method and used it in the evaluation of multi-level dam deformation. What the improvement is using ideal interval method combined with entropy weight to calculate the weight of each index and level. It overcame the defects that ideal interval method is only applicable to the system of single level evaluation index structure and applied to the evaluation of multi-level dam deformation. The evaluation results showed that improved ideal interval method can reflect the dam deformation and correspond to the actual deformation situation, which demonstrated that the improved ideal interval method can be used in the evaluation of dam deformation.