中文摘要：

针对物元可拓方法中存在的局限性,对物元可拓方法进行了修正,在点与区间的距和等级评定的计算方法上进行了改进。以大坝基岩安全监测指标数据为基础,将改进物元可拓方法应用于大坝基岩安全评价中,采用熵权法确定各指标的权重,通过对比度确定待评大坝基岩的安全等级,构建出基于改进物元的大坝基岩安全评价模型。应用表明,该改进物元可拓模型能够客观地反映大坝基岩安全状态。

英文摘要：

Aiming at the limitation of the matter- element extension method, the matter- element extension method is modified, and the calculation method of distance between the point and the in- terval and grade evaluation of point is improved. Based on the dam foundation rock safety monito- ring data, the improved matter - element extension method is applied to the dam foundation rock safety evaluation. The entropy weight method is used to determine the weight of each index, and the safety grade of the bedrock is determined by the contrast ratio, Based on improved element - based model for dam foundation rock safety evaluation. The application shows that the improved matter- element extension model can objectively reflect the security state of dam foundation rock.