基于IOWA算子的地铁车站深基坑施工安全综合评价

为解决地铁深基坑施工安全评价指标模糊性、灰色性和专家认知极端性造成安全等级难以确定的困难，提出基于IOWA算子的地铁车站深基坑施工安全评价方法。主要研究与结论如下： 1）耦合WBS-RBS 2个维度从渗流破坏、突涌破坏、机械伤人、坑内土体滑坡、支撑失稳、踢脚破坏6个方面构建指标体系； 2）对专家初始决策数据重新排序，利用IOWA算子确定指标初始权重并引入系数调整边界权值，得到指标最终权重； 3）运用灰色聚类提升评价过程透明化，聚类分析出车站深基坑施工安全等级； 4）以郑州地铁1号线紫荆山车站为例，认为紫荆山车站深基坑施工安全等级高，渗流破坏、坑内土体滑坡、支撑失稳、踢脚破坏是影响深基坑施工安全的主要风险指标，建议施工方重点关注。

Comprehensive Evaluation of Construction Safety of Deep Foundation Pit of Metro Station Based on IOWA Operator

The safety level of deep foundation pit construction of metro station is difficult to determine due to the fuzzy evaluation index, grayness and expert cognition extremes. As a result, a safety evaluation method for deep foundation pit construction of metro station based on IOWA operator is proposed. Firstly, the two dimensions of WBS RBS are coupled to construct the index system from six aspects, i.e. seepage damage, inrush damage, mechanical injury, soil landslide, support instability and kicking damage. Secondly, the expert initial decision data are reordered; the IOWA is utilized to determine the initial weight of the indicator, and the coefficient is introduced to adjust the boundary weight, so as to obtain the final weight of the indicator. Thirdly, the gray clustering is used to improve the transparency of the evaluation process, and the safety level of the deep foundation pit construction is analyzed. Finally, the evaluation method is applied to Zijingshan Station on Zhengzhou Metro Line No. 1; and the applicable results show that the construction safety level of deep foundation pit of Zijingshan Station is high, and the seepage failure, soil landslide, support instability and kicking damage are the main risks affecting the construction safety of deep foundation pit, which should be paid more attention to.