为提高山区隧道施工场地布置方案决策的准确性,以牛栾村隧道六种施工场地布置方案为例,提出了基于改进灰靶的方案优选模型.首先,通过分析场地布置方案影响因素,构建了以方案可行性、方案经济性、环境影响和社会效益影响为核心的评价指标体系;其次,采用云模型将定性指标定量描述,并运用CRITIC(criteria importance though intercriteria correlation)确定指标权重;最后以灰色关联差异信息值为基础,结合欧几里得理论计算修正的加权靶心距,通过对比靶心距实现方案优选,并采用单因素轮换法(one-at-a-time,OAT)进行了指标敏感性分析.结果表明:最优方案的加权靶心距为0.610,评选出的方案与实际一致,并分析出"地形地貌改变"为对方案评选影响最大的指标.可见,该方法呈现了各方案的优劣,使山区隧道施工场地布置方案评选更科学、合理.
Preferred Construction Site Layout Scheme for Mountain Tunnels Based on Improved Grey Target Decision
In order to improve the accuracy of the decision of mountain tunnel construction site layout plan,a plan preference model based on the improved gray target decision was proposed with the example of the six construction site layout options in the Niuluan Village Tunnel.Firstly,by analyzing the influencing factors of construction site layout,the evaluation index system with feasibility,economy,environmental impact and social benefit was constructed.Secondly,using the cloud model,the qualitative indicators were quantified and the indicator weighs were determined using criteria importance though intercriteria correlation(CRITIC).Finally,based on the information value of the gray correlation difference,in combination with the calculation of the Euromed theory,the weighted target center gap was revised,the program preference was achieved through the contrast of the target center distance,and the index sensitivity analysis was carried out using the one-at-a-time(OAT)method.The results show that the scheme selected based on the improved gray target decision is consistent with the actual selection scheme,the weighted target center gap is 0.610,and the selected scheme is consistent with the actual scheme,and the"landform change"is analyzed as the index with the greatest impact on the selection of the scheme.Thus the method present the advantages and disadvantages of each scheme,which make the selection of mountain tunnel construction site layout scheme more scientific and reasonable.
万方数据
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