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针对锦屏一级水电站基坑施工方案安全风险评价受主观性影响大的问题,在定义水电工程施工方案安全风险指数的前提下,基于改进的熵权法中的熵值确定了基坑施工方案安全风险评价各个指标项的权重,提出了锦屏一级水电站基坑施工方案安全风险评价的观控风险模型,评价了四种基坑施工方案的安全风险程度,指出各个施工方案的比较收益与风险排序明显不同,说明风险与收益之间可相互转化,只要能找到平衡点就能使承担的风险与收益同时达到理想状态。
Aiming at the problem that the safety risk assessment of the construction plan of Jinping I Hydropower Station is greatly affected by subjectivity, under the premise of defining the safety risk index of hydropower project construction plan, the construction plan of foundation pit is determined based on the entropy value of the improved entropy method Safety risk assessment of each index item weight, put forward the Jinping I Hydropower Station pit construction safety risk assessment of the risk-control model to evaluate the construction of four kinds of pit construction safety risk degree, pointed out that the various construction programs and Obviously different risk ranking, indicating that risk and return can be transformed into each other, as long as the balance can be found to make the risk and benefits at the same time achieve the desired state.