桥梁生命周期环境影响评价研究

为了量化评价桥梁的综合环境影响,提出了桥梁生命周期环境影响评价方法。分析了在桥梁的设计、原材料的生产加工、现场的施工、桥梁的运营和维护、桥梁的废弃这5个阶段带来的综合环境影响。应用该方法对武汉市南太子湖大桥生命周期环境影响进行分析评价。结果表明,固体废弃物在建筑材料生产过程和桥梁施工过程中的环境影响最大,车辆排放CO2而导致的全球变暖在桥梁运营维护过程中环境影响显著。该结果可作为桥梁生命周期环境影响评价的基础数据,用于桥梁工程环境影响综合评价。

Research on Bridge Environment Impact with Life Cycle Assessment

A life cycle assessment(LCA) framework was developed to evaluate bridge environment impact of bridges in China.The bridge's life was divided into 5 stages: bridge's design,raw materials' process,construction,operation,and demolition.The synthesized environment impact was analyzed in terms of environmental pollution.The Southern Taizi Lake bridge in Wuhan was analyzed as a typical case.The results show that solid castoff take up the most environment impact in courses of raw materials' process and construction,and CO2 exhausted by vehicle during the stage of operation evidently caused global warming.The conclusions can be used to assess the life cycle environmental impact of construction projects and help the stakeholders to make decision.