摘要
针对盾构机在全断面硬岩地层中掘进遇到的刀具磨损严重的难题,结合青岛地铁6号线朝阳路站—峨眉山路站盾构隧道工程实例,采用多元回归分析的方法分析滚刀安装半径、地层参数、掘进距离与正面滚刀磨损量之间的关系。考虑盾构总推力、刀盘转速、刀盘扭矩、掘进速度、安装半径、岩石单轴抗压强度和磨蚀性指数等多重变量,构建正面滚刀磨损预测模型,分析不同轨迹正面滚刀的磨损特征,得出以下结论:(1)在800 m的掘进距离内,平均每个刀位换刀3.18次,随着滚刀安装半径增加,单把滚刀的累计换刀次数逐渐增加、平均掘进长度逐渐降低,其累计磨损量呈幂指数增加;(2)正面滚刀平均每延米磨损量随岩石强度增加呈幂指数增长、随磨蚀性指数增加呈指数增长,且拟合相关系数较高,表明以上参数对滚刀磨损有着关键作用;(3)构建的滚刀磨损量计算模型考虑了掘进参数、刀具安装半径、岩石强度和磨蚀性指数等因素,可对硬岩地层盾构正面滚刀磨损规律进行预测,此外,验证了滚刀磨损预测模型的准确性,预测值与实测值误差不超过13%。
For the complex problem of severe tool wear encountered by shield machines tunneling in full-section hard rock,the relationship between disc cutter installation radius,stratigraphic parameters,tunneling distance,and cutter wear was analyzed by multiple regression analysis,take into account the example of shield project from Chaoyanglu Station to Emeishanlu Station of Qingdao Subway Line 6.Considered various variables such as shield thrust,rotation speed,cutterhead torque,advance speed,installation radius of cutters,UCS and CAI of rock,a face cutter wear prediction model was established to analyze the cutters wear characteristics,and the following conclusions were drawn:(1)Within the 800 m tunneling distance,the average number of cutter changed per position was 3.18,and as the installation radius of hob increased.(2)the average wear per linear meter of the cutter increases power exponentially with the increase of rock strength and exponentially with the increase of abrasiveness index,and the fitted correlations coefficient were high,which indicates that the above parameters play a crucial role in cutter wear.(3)the cutter wear calculation model takes into account the tunneling parameters,rock strength and abrasiveness of the rock,can predict the wear pattern of the face cutters of shields in hard rock.In addition,the accuracy of the cutter wear prediction model was verified,and the error between the predicted and measured values do not exceed 13%.
作者
单义为
江玉生
邵小康
叶守杰
李琛
方显轮
王振勇
SHAN Yiwei;JIANG Yusheng;SHAO Xiaokang;YE Shoujie;LI Chen;FANG Xianun;WANG Zhenyong(School of Mechanics and Civil Engineering,China University of Mining&Technology-Beijing,Beijing 100083,China;Qingdao Metro Line 6 Co.,Ltd.,Qingdao 266100,China)
出处
《铁道标准设计》
北大核心
2023年第12期136-142,共7页
Railway Standard Design
基金
国家自然科学基金项目(U1261212)。
关键词
盾构
硬岩地层
正面滚刀
刀具磨损
掘进参数
多元回归
shield
hard rock
face cutter
cutter wear
tunneling parameters
multiple regression
作者简介
单义为(1997-),男,硕士研究生,主要从事岩土工程技术研究工作,E-mail:935986968@qq.com。;通信作者:江玉生(1964-),男,教授,1994年毕业于中国矿业大学矿山建设专业,工学博士,主要从事盾构/TBM施工技术研究工作,E-mail:yusheng.jiang@263.net。
