基于确定性的桥梁环境影响中点模型评价

Evaluation of Bridge Environmental Impact Midpoint Model Based on Determination

摘要:

为研究桥梁结构生命周期的环境影响，基于生命周期评价（LCA）方法选取了全球增温潜势（GWP）、初级能源消耗（PED）、非生物资源消耗潜值（ADP）、水资源消耗（WU）、酸化潜值（AP）、富营养化潜值（EP）、可吸入无机物（RI）、消耗臭氧潜能值（ODP）、臭氧合成（POFP）等9类环境影响因素，建立基于确定性的桥梁全生命周期环境影响中点模型，并选取1座典型桥梁进行案例分析，研究桥梁在生命周期内基于中点模型的环境影响。结果表明：采用不同建材的桥梁环境影响差异较大，其中混凝土、钢材、沥青等3类建材环境影响最大；在桥梁各生命周期阶段对环境产生的影响不一，其中建筑材料的生产以及桥梁现场施工过程对环境影响最大，其他阶段环境影响相对较少。

Abstract:

In order to study the environmental impact of bridge structure life cycle, based on the life cycle assessment (LCA) method, nine types of environmental impact factors, such as global warming potential (GWP), primary energy depletion (PED), abiotic depletion potential (ADP), water utilization (WU), acidification potential (AP), eutrophication potential (EP), inhalable inorganics (RI), ozone depletion potential (ODP), and photochemical ozone creation potential (POCP) are selected. Based on the determination, the calculation method and model of bridge life cycle environmental impact midpoint model are established. And a typical case bridge is selected for the case analysis to study the environmental impact based on the midpoint model in the life cycle of the bridge. The result shows that the environmental impact of bridges with different building materials is quite different, in which three kinds of building materials such as concrete, steel and asphalt have the maximum impact on the environment. The impact on the environment varies at different stages of the life cycle of the bridge, in which the production of building materials and the site construction process of bridge are the maximum impact on the environment, and the environmental impact in the other stages is relatively little.