摘要
为应对复杂地质条件下经验方法无法定量评价掘进机设备选型适应性和经济性的难题,提出盾构/TBM对比选型方法,基于地层综合组段划分技术,依据开挖面岩层性质、地下水情况、施工环境等因素将复杂地层划分成若干独立组段,计算不同类型掘进设备在各个组段内的施工效率和施工成本并作对比,综合汇总后给出各类设备施工定量化效率、工期和经济指标,决策者可根据项目主控因素作出选型结论。此外,同时结合包含硬岩和不良地质段的隧道工程掘进机选型实例,分析加强型盾构对此类地层的适应性,给出首例加强型盾构的配置参数和针对性设计,并对加强型盾构在硬岩段掘进时的滚刀磨损进行回归分析。研究结果表明:(1)盾构/TBM对比选型技术综合考虑不同设备在各隧道组段内的适用性、施工效率、施工成本,选型决策更具科学性和实用性;(2)加强型盾构配置6 r/min刀盘转速和19英寸大直径滚刀,可大幅提升掘进效率,因此对硬岩地层和不良地质段兼具适应性;(3)加强型盾构滚刀累计磨损量与其安装半径呈指数型相关性,边缘滚刀磨损速率最大,施工中应及时检修,保障开挖直径充足。
To deal with the difficulty that empirical methods cannot quantitatively evaluate the adaptability and economy of tunneling machine type selection under complex geological conditions,the shield/TBM comparative selection method is proposed.Based on the comprehensive classification of the stratum,the complex strata are divided into several independent sections according to the characteristics of rock in the tunnel face,groundwater,environment and other factors.The construction efficiency and construction cost of different types of tunneling equipment in each section are calculated and compared.After a comprehensive summary,the quantified efficiency,schedule,and economic indicators of various types of equipment are given.Decision-makers can make conclusions according to the central control factors of the project.In addition,combined with the example of a tunnel project that includes both hard rock and unfavorable geology,the adaptability of the targeted-strengthen shield to this kind of stratum is analyzed,the configuration parameters and targeted design of this machine are offered,and the regression analysis of the cutter wear in the hard rock section is carried out.The results show that:(1)The shield/TBM comparison selection technology comprehensively considers the applicability,construction efficiency,and construction cost of different equipment in each tunnel segment,making the selection decision more scientific and practical;(2)Equipped with 6r/min cutterhead rotation speed and 19-inch large diameter disc cutter,the targeted-strengthen shield could significantly improve the tunneling efficiency,so it is adaptable to hard rock and unfavorable geology;(3)There is an exponential correlation between the cumulative wear amount of targeted-strengthen shield disc cutter and its installation radius,and the wear rate of edge cutter is the highest.Timely maintenance of cutters should be conducted during construction to ensure adequate excavation diameter.
作者
刘泉维
邵小康
纪明涛
刘林胜
叶守杰
江玉生
杨志勇
张西昌
LIU Quanwei;SHAO Xiaokang;JI Mingtao;LIU Linsheng;YE Shoujie;JIANG Yusheng;YANG Zhiyong;ZHANG Xichang(Qingdao Metro Line 6 Co.,Ltd.,Qingdao 266427,China;Qingdao Metro Group Co.,Ltd.,Qingdao 266100,China;School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)
出处
《铁道标准设计》
北大核心
2024年第7期154-161,170,共9页
Railway Standard Design
基金
国家自然科学基金项目(U1261212)。
关键词
复合地层
机械法掘进
加强型盾构
对比选型
地层组段划分
滚刀
刀具磨损
composite stratum
mechanical tunneling
targeted-strengthen shield
comparison and lectotype
classification of stratum
disc cutter
cutter wear
作者简介
刘泉维(1977-),男,研究员,2014年毕业于北京交通大学地下工程专业,工学博士,主要从事城市地铁建设方面的研究与管理工作,E-mail:anboil@126.com;通信作者:邵小康(1997-),男,博士研究生,主要从事盾构/TBM施工技术相关研究工作,E-mail:xiaokang.shao@outlook.com。
