摘要
盾构隧道施工中刀具磨损问题直接影响工程效率与成本控制,传统Cerchar磨蚀指数(CAI)评估方法难以全面反映岩石体积破碎特性。为提升岩石抗切削效能评估精度,采用改进型Cerchar磨蚀率(CAR)试验方法,结合高精度伺服加载系统与显微成像技术,对3类典型岩体实施差异化划痕路径试验。通过量化钢针磨损体积与岩石剥离体积的比值,构建多维评估体系。结果表明,基于CAI、岩石侵入深度与剥离体积的三维分类模型可有效区分不同岩体的可挖掘性等级,砂岩与花岗岩在相同CAI值下因矿物结构差异呈现显著不同的工具损耗特征。
The problem of tool wear in shield tunnel construction directly affects the engineering efficiency and cost control.The traditional Cerchar abrasion index(CAI)evaluation method is difficult to fully reflect the volume crushing characteristics of rock.In order to improve the evaluation accuracy of rock anti-cutting efficiency,the improved Cerchar abrasion rate(CAR)test method,combined with high-precision servo loading system and microscopic imaging technology,was used to carry out differential scratch path tests on three typical rock masses.A multi-dimensional evaluation system is constructed by quantifying the ratio of steel needle wear volume to rock stripping volume.The results show that the three-dimensional classification model based on CAI,rock intrusion depth and stripping volume can effectively distinguish the exploitability grade of different rock masses.Under the same CAI value,sandstone and granite show significantly different tool loss characteristics due to the difference of mineral structure.
作者
张路涛
ZHANG Lutao(China Railway 18th Bureau Group Third Engineering Co.,Ltd.,Zhuozhou,Hebei 072750,China)
出处
《施工技术(中英文)》
2025年第10期64-70,共7页
Construction Technology
基金
中国铁建股份有限公司2022年度科技研究开发计划及资助课题(2022-C1)
中铁十八局集团有限公司2022年度科研创新项目(C2022-051)。
关键词
隧道
盾构
岩石
磨蚀率
剥离体积
tunnels
shields
rock
abrasion rate
peeling volume
作者简介
张路涛,工程师,硕士,E-mail:2597575784@qq.com。
