基于熵值修正的G2法的绿色施工节水措施效益综合评价

Comprehensive evaluation of green construction water saving measures based on entropy corrected G2 method

为了衡量绿色施工过程中不同节水措施产生的综合效益,构建了一套绿色施工节水措施综合效益评价体系。通过实地调查并结合相关文献,建立了包括社会、经济、生态以及技术效益4方面共计19项指标的层次模型。考虑到施工现场环境条件复杂,采用熵值修正的G2法对指标进行赋权,化解了采用单一赋权方法不能同时反映决策者意图与数据自身所携信息的矛盾;针对施工现场只有小样本数据的极端情况,选取TOPSIS分析法,能够快速准确地对施工现场选取的节水措施进行综合效益评价。最后选取西北某建设项目进行实例验证,并将结果与熵权-TOPSIS评价模型所得结果的对比,验证了该模型的可靠性与可行性。

In order to measure the comprehensive benefit of different water-saving measures in the process of green construction,a comprehensive benefit evaluation system was proposed based on which,a hierarchical model with 19 indicators from aspects of social,economic,ecological and technical benefits was established considering the field survey and related literature.Due to the complexity of the construction site environment,the entropy modified G2 method was adopted to weight the indicators.This solved the contradiction that a single weighting method could not simultaneously reflect the intention of the decision maker and the information contained in the data.In view of the extreme situation that there were only a small amount of sample data on the construction site,the TOPSIS analysis method was selected to quickly and accurately evaluate the comprehensive benefits of water-saving measures adopted on the construction site.Finally,a construction project in northwest China was selected as the verification case.The field results were compared with those of the entropy weighted TOPSIS evaluation model,which verified the reliability and feasibility of the model.