基于生命周期评价方法的隧道施工渣土利用减碳效果分析  

ANALYSIS OF CARBON REDUCTION EFFECT OF TUNNEL CONSTRUCTION MUCK SOIL UTILIZATION BASED ON LIFE CYCLE ASSESSMENT

作　　者：全昭熹 陈湘生[1,2,3] 陈锋 高望 韩文龙 QUAN Zhaoxi;CHEN Xiangsheng;CHEN Feng;GAO Wang;HAN Wenlong(College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China;Key Laboratory for Resilient Infrastructures of Coastal Cities(MOE),Shenzhen 518060,China;Shenzhen Key Laboratory of Green,Efficient and Intelligent Construction of Underground Metro Station,Shenzhen 518060,China;Foshan Jianying Development Co.,Ltd.,Foshan 528313,China)

机构地区：[1]深圳大学土木与交通工程学院,广东深圳518060 [2]滨海城市韧性基础设施教育部重点实验室,广东深圳518060 [3]深圳市地铁地下车站绿色高效智能建造重点实验室,广东深圳518060 [4]佛山市建盈发展有限公司,广东佛山528313

出　　处：《环境工程》2023年第10期91-98,162,共9页Environmental Engineering

基　　金：国家自然科学基金项目(51938008)。

摘　　要：渣土利用已成为盾构绿色施工的关键措施之一,为进一步量化隧道盾构渣土资源化利用的碳减排潜力,通过构建隧道盾构渣土经改良后进行路基填筑的全过程碳排放估算方法,利用季华路西延线过顺德水道隧道工程实际工程数据,对比分析了渣土再利用与常规堆填处理的碳排放差异,并对渣土利用全过程碳排放进行了敏感性分析。结果表明:渣土利用碳排放主要发生在渣土改良运输阶段,常规填埋处理主要应用于产生阶段;顺德水道过江隧道工程的总排渣量约为65029 m^(3),其中可用来进行渣土改良的排渣量为53162 m^(3),若全部进行填埋处理,则全生命周期的CO_(2)排放量约为1.84×10^(6) kg CO_(2)eq,占用11058 m^(2)的填埋场地;经3%石灰+3%脱硫石膏改良后的渣土CBR值可达到141.4,回弹模量为198.8 MPa,全过程产生的CO_(2)比渣土常规处理产生的CO_(2)增加了8.89×10^(5) kg CO_(2)eq;经3%电石渣+6%粉煤灰改良后的渣土CBR值可达到89.06、回弹模量为158.9 MPa,全过程产生的CO_(2)比渣土常规处理产生的CO_(2)减少了6.44×10^(5) kg CO_(2)eq。The utilization of muck soil has become one of the key tasks in green shield construction.In order to further quantify the carbon emission reduction potential of the resource utilization of the muck soil from tunnel shield construction,the carbon emission estimation method for the whole process of subgrade filling with improved muck soil from tunnel shield construction was established.Based on the actual engineering data of the Shunde Waterway Tunnel Project of the West Extension Line of Jihua Road,the difference in carbon emissions between the utilization of muck soil and conventional landfill treatment was analyzed.In addition,the sensitivity analysis of carbon emissions in the whole process of residue utilization was also carried out.The results showed that:carbon emissions from the utilization of muck soil mainly occur in the muck soil improvement and transportation stage,while those of the conventional landfill treatment mainly occur in the generation stage;the total discharge of muck soil from the Project is about 65029 m^(3),of which 53162 m^(3) can be used for muck soil improvement.If totally landfilled,the CO_(2) emission during the whole life cycle is about 1.84×10^(6) kg CO_2eq,occupying 11058 m^(2) of landfill site;the CBR of muck soil improved by 3% lime+3% desulfurized gypsum can reach 141.4,and the rebound modulus is 198.8 MPa.The CO_(2) produced in the whole process is 8.89×10^(5) kg CO_(2eq) more than that produced by conventional treatment of muck soil;the CBR of muck soil improved by 3% carbide slag+6% fly ash can reach 89.06,and the rebound modulus is 158.9 MPa.The CO_(2) produced in the whole process is 6.44×10^(5) kg CO_(2eq) less than that produced by conventional treatment of muck soil.

关 键 词：盾构隧道 渣土利用 生命周期评价 碳减排 

分 类 号：U455.43[建筑科学—桥梁与隧道工程] X73[交通运输工程—道路与铁道工程]