Analysis Of Carbon Emission In Highway Bridge Construction

With the rapid development of the civil engineering,but also brought a series of environmental problems.Bridge engineering belongs to the field of civil engineering,the bridge in the construction process consumes a lot of resources,resulting in environmental pollution and greenhouse gas emissions,more and more attention from the community,how to reduce the bridge construction process carbon emissions,to achieve low-carbon construction,significance.In this paper,a process-based inventory analysis method is used to study the carbon emissions during bridge construction.The main work is as follows:1.The bridge life cycle is divided into material production,construction,operation and maintenance,removal of four stages.The carbon emission model of the bridge construction stage was established by the carbon decomposition factor decomposition theory and the emission coefficient method.Elaborated on the cement,steel,machinery,carbon emissions factor how to establish and sort out a variety of building materials inventory data.2.The construction process of T-beam bridge is divided into three stages:material production,transportation and mechanical construction.According to the construction sequence of the bridge,the carbon emission accounting analysis is carried out from different parts(foundation,bridge pier abutment and superstructure).To find a large part of carbon emissions,put forward the corresponding countermeasures.3.Bridge construction needs to consume a variety of building materials,the construction phase to use a variety of machinery.The sensitivity analysis of several main parameters(cement carbon emission factor,steel carbon emission factor,electricity carbon emission factor and diesel carbon emission factor)influencing the carbon emission during the bridge construction process was carried out.4.Carbon emissions analysis of the combined box girder bridge from the fulllife cycle.During the construction phase,the carbon emission of the push method and the full floor construction method are compared and the two construction methods are evaluated from the carbon emission angle.The efficiency of high performance concrete in the construction of combined box girder bridge is verified by an example.