基于改进证据理论的深基坑施工风险评价

Risk Assessment of Deep Foundation Pit Construction Based on Improved Evidence Theory

鉴于深基坑施工风险具有不确定性,针对不确定性风险指标进行有效融合是风险评价的难点。通过K-L信息距离对评价指标中的高度冲突进行识别并隔离,采用证据理论对深基坑施工风险不确定性指标进行融合。研究结果表明,改进证据理论的评价方法可提高融合结果的收敛度,并可为深基坑施工风险评价提供依据。

In view of the uncertainty of deep foundation pit construction risk,it is difficult to integrate the uncertainty risk indicators effectively.The K-L information distance was used to identify and isolate the high conflicts in the evaluation indexes,and the evidence theory was used to fuse the risk and uncertainty indexes of deep foundation pit construction.The results show that the improved evaluation method of theory can improve the convergence degree of fusion results,and provide a basis for the risk evaluation of deep foundation pit construction.