基于低碳目标的城市地下道路明挖结构精细化设计研究

Study on Refined Design of Excavated Structures of Urban Underground Roads Based on Low-carbon Target

摘要:

在低碳战略的背景下，大体量地下混凝土结构生产建设中的碳排量控制被提出了相应的要求。在分析城市地下道路4种典型明挖结构形式的刚度设计、价格设计理念的基础上，拓展了碳排放评价环节，采用层次分析法处理多目标评价的问题，根据不同设计理念可为影响因素赋予不同的权重，由此初步建立了地下道路明挖钢筋混凝土结构的低碳设计方法。采用低碳设计理念来控制混凝土和钢筋的设计配比和材料用量，并与传统刚度导向、价格导向下的设计方案进行对比，为混凝土结构物化阶段的碳排放控制提供重要的科学依据。

Abstract:

In the context of low-carbon strategy, the corresponding requirements are put forward to control the carbon emissions in the production and construction of large-scale underground concrete structures. On the basis of analyzing the stiffness design and price design concepts of four typical excavated structural forms of urban underground roads, the carbon emission assessment link is expanded. The analytic hierarchy process is used to handle the problem of multi-objective evaluation. The different weights can be assigned to the influencing factors according to different design concepts. Thus, a low-carbon design method for excavated reinforced concrete structures of underground roads is initially established. The low-carbon design concept is used to control the design ratio and material consumption of concrete and rebar. And the comparison is carried out with the design schemes under the traditional stiffness and price orientations, which provides the important scientific basis for the control of carbon emissions in the materialization stage of concrete structures.