EPB盾构刀盘泥饼成因分析及评价模型构建  

Formation Factor Analysis and Evaluation Model Construction of Mud Cake on EPB Cutterhead

作　　者：丁小彬 杨辉泰 施钰 DING Xiaobin;YANG Huitai;SHI Yu(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China;South China Institute of Geotechnical Engineering,Guangzhou 510640,Guangdong,China)

机构地区：[1]华南理工大学土木与交通学院,广东广州510640 [2]华南岩土工程研究院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2024年第5期71-83,共13页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(41827807);广东省现代土木工程技术重点实验室项目(2021B1212040003)。

摘　　要：目前土压平衡(EPB)盾构机刀盘结泥饼的研究大都聚焦在单一因素上,缺少整体的、量化的评价标准,难以满足工程上对刀盘结泥饼的预测需求。针对以上问题,文中从地质条件、盾构选型、施工因素3个层面出发,系统总结了导致土压平衡盾构机刀盘泥饼形成的23个主要因素;将土压平衡盾构机在掘进过程中的刀盘结泥饼风险划分为4个等级:高风险、中风险、低风险和无风险。同时提出了结泥饼的风险因子量化标准,并结合层次分析法构建了土压平衡盾构的刀盘结泥饼风险评价模型;基于广州地铁14号线马创区间右线115-165环盾构隧道工程的掘进数据,计算出盾构机掘进过程中不同环的刀盘结泥饼风险程度,验证了刀盘结泥饼风险评价模型的预测性能。研究结果表明:结泥饼风险评价模型的23个影响因子中,以塑性指数、刀盘扭矩、液性指数、总推力的影响权重最大,启动扭矩的影响权重最小;结泥饼风险评价模型表现出了良好的预测性能,计算得到的结泥饼风险变化曲线与现场施工情况基本吻合;盾构掘进参数的变化能很好地反映掘进过程中泥饼的形成,其中总推力对泥饼产生最敏感,刀盘扭矩、土仓压力、推进速度和螺旋机转速的敏感度依次降低。研究成果可适用于类似工程中的土压平衡盾构机刀盘结泥饼的评价分析。Focusing on individual factors,the current research on the mud cake formation of earth pressure balance(EPB)tunnel boring machines(TBMs)lacks a comprehensive and quantitative evaluation standard and can’t meet the predictive needs of TBM mud cake in engineering.Addressing these issues,this paper systematically summarized 23 key factors contributing to the formation of mud cake of EPB TBMs from three aspects:geological conditions,TBM selection,and construction factors.The mud cake risk during the excavation process of EPB TBMs was classified into four levels:high,medium,low,and no risk.Simultaneously,the paper proposed a quantitative standard for mud cake risk factors and constructed a risk evaluation model for the mud cake of EPB TBMs utilizing the analytic hierarchy process(AHP).Based on excavation data from the Ma-Chuang section,right tunnel of Line 14 of the Guangzhou Metro,the mud cake risk levels for different tunnel rings during TBM excavation were calculated,validating the predictive performance of the mud cake risk evaluation model.Research results indicate that among the 23 influencing factors in the mud cake risk evaluation model,the plasticity index,cutterhead torque,liquidity index,and total thrust have the highest impact weights,while the startup torque has the lowest impact weight.The mud cake risk evaluation model demonstrates excellent predictive performance,with the calculated mud cake risk variation curve closely matching on-site construction conditions.Changes in TBM excavation parameters effectively reflect the formation of mud cakes during excavation,with total thrust being the most sensitive,followed by cutterhead torque,chamber pressure,advance speed,and screw conveyor speed in decreasing order of sensitivity.The research results can be applied to the evaluation and analysis of mud cake formation by EPB TBM cutterheads in similar engineering projects.

关 键 词：土压平衡盾构 泥饼 量化分析 评价模型 

分 类 号：TU941[建筑科学—建筑技术科学]