大坝除险加固效果评价指标包括时效性指标和非时效性指标两类, 时效性指标的量化是进行大坝除险加固效果定量评价的关键。针对现有大坝除险加固评价体系中时效性指标量化理论较为缺失的问题, 基于无量纲化的定量时效性指标, 研究了大坝性态变化以及指标等级变化对时效性指标评价的影响, 推导了安全度和等级提升系数的公式, 进而建立了时效性指标量化模型。以江西某水库除险加固为例, 分析除险加固前、后各时效性指标的变化情况, 并对模型的合理性进行了验证。结果表明, 应用本文建立的大坝除险加固时效性指标量化模型可合理评价除险加固过程中的时效性指标。

The basic indexes for evaluation of a dam's reinforcement effect include time-efficient indexes and non-time-efficient indexes. The quantification of time-efficient indexes is the key to quantitative evaluation of the reinforcement effect of a dam. Since there is a lack of theory on quantification of time-efficient indexes in the reinforcement evaluation system of dams, in this paper we studied the influence of the change of dam behavior and the change of index level on the evaluation of time-efficient indexes, deduced the formulas for safety degree and grade promotion coefficient on the basis of the dimensionless quantitative time-efficient indexes, and then established a quantitative model of time-efficient indexes. The reinforcement of a reservoir in Jiangxi was taken as an example. We analyzed the changes of the time-efficient evaluation indexes before and after reinforcement, and verified the rationality of the model. The results indicated that the time-efficient indexes can be reasonably evaluated by the proposed quantitative model of time-efficient indexes.

国家自然科学基金/ 雅砻江联合基金项目( U1765205) ; 江西省水利科技项目( KT201545)