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作 者:郭亚林 孙文昊[3] 许洪伟[3] 何卫 陈政 郭春[1,2] GUO Yalin;SUN Wenhao;XU Hongwei;HE Wei;CHEN Zheng;GUO Chun(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031;Key Laboratory of Transportation Tunnel Engineering,Ministry of Education,Southwest Jiaotong University,Chengdu 610031;China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063)
机构地区:[1]西南交通大学土木工程学院,成都610031 [2]西南交通大学交通隧道工程教育部重点实验室,成都610031 [3]中铁第四勘察设计院集团有限公司,武汉430063
出 处:《现代隧道技术》2023年第3期14-23,64,共11页Modern Tunnelling Technology
基 金:“十三五”国家重点研发计划(2019YFC0605104);四川省社会科学规划项目(SC22B031);四川省教育科研资助金项目(SCJG20A120).
摘 要:为探明盾构法、钻爆法两类常用隧道施工工法碳排放的差异,以深圳地铁7号线部分隧道区间段的施工为例,基于碳排放计算公式,从建材生产、建材运输和现场施工三个阶段,计算分别采用盾构法、钻爆法施工时的碳排放强度以及关键排放源的贡献占比。结果表明,盾构法施工隧道的平均碳排放强度为8104.4 tCO_(2)eq/km,钻爆法施工隧道为15124.8 tCO_(2)eq/km,采用盾构法施工碳排放相对更低;两种工况下建材生产阶段碳排放量均超过碳排放总量的80%;钢材、混凝土和水泥是关键材料碳排放来源,在两种工况下隧道施工建材生产阶段的碳排放中贡献占比分别为40%、1.1%和47%以及39%、29%和26%;通过优化改进建筑材料的生产加工流程,或提高清洁能源在发电能源结构中的占比,可以低建筑材料和电力能源生产环节的碳排放因子,最终实现较为明显的碳减排效果。In order to explore the differences of carbon emission between two common construction methods,i.e.shield method and drill and blast method,the construction of some tunnel sections of Shenzhen Metro Line 7 is taken as an example to calculate,by using the carbon emission calculation formula,the carbon emission intensities and contribution ratios of the key emission sources of the two methods in the three stages,i.e.construction materials production,costruction materials transportation and onsite construction.According to the calculation results,the average carbon emission intensity of the shield method is 8,104.4 t CO_(2)eq/km and that of the drill and blast method is 15,124.8 t CO_(2)eq/km,so the carbon emission of the shield method is less.In both methods,the carbon emission in the construction materials production stage exceeds 80% of the total carbon emission.Steel,concrete and cement are the key sources of carbon emission.The contribution ratios of the three construction materials in carbon emission are 40%,1.1% and 47% in one tunnel construction method and 39%,29% and 26% in the other.By optimizing or improving the construction material production processes or increasing the proportion of clean energy in electric energy structure,the carbon emission factors in construction materials production and electric energy production can be reduced,to eventually reduce carbon emission significantly.
关 键 词:地铁隧道 施工工法 碳排放强度 计算分析 敏感性分析
分 类 号:U455[建筑科学—桥梁与隧道工程]
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