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山东大学学报 (工学版) ›› 2025, Vol. 55 ›› Issue (3): 111-120.doi: 10.6040/j.issn.1672-3961.0.2024.169

• 土木工程 • 上一篇    

基于小尺度滚刀直线切割试验的岩石强度预测

耿麒1,李晓斌1,黄雨枫1,汪学斌1*,杨沐霖1,郭惠川2,章慧健3   

  1. 1.道路施工技术与装备教育部重点实验室(长安大学), 陕西 西安 710064;2. 中铁十八局集团有限公司, 天津 300222;3.西南交通大学土木工程学院, 四川 成都 610031
  • 发布日期:2025-06-05
  • 作者简介:耿麒(1989— ),男,山东淄博人,副教授,博士生导师,博士,主要研究方向为大型隧道掘进装备研制及施工. E-mail:gengqi@chd.edu.cn. *通信作者简介:汪学斌(1986— ),男,陕西商洛人,讲师,硕士生导师,博士,主要研究方向为工程机械的设计与仿真. E-mail:wangxuebin@chd.edu.cn
  • 基金资助:
    国家自然基金面上资助项目(52278390);陕西省自然科学基础研究计划面上资助项目(2025JC-YBMS-416);陕西省留学人员科技活动择优资助项目(2024006)

Rock strength prediction based on scaled linear cutting test by disc cutter

GENG Qi1, LI Xiaobin1, HUANG Yufeng1, WANG Xuebin1*, YANG Mulin1, GUO Huichuan2, ZHANG Huijian3   

  1. GENG Qi1, LI Xiaobin1, HUANG Yufeng1, WANG Xuebin1*, YANG Mulin1, GUO Huichuan2, ZHANG Huijian3(1. Key Laboratory of Road Construction Technology and Equipment, Ministry of Education(Chang'an University), Xi'an 710064, Shaanxi, China;
    2. China Railway 18th Bureau Group Corporation Limited, Tianjin 300222, China;
    3. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
  • Published:2025-06-05

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摘要： 为支撑岩土、隧道工程中的岩石选样及现场施工的岩石强度测试,研究利用小尺度滚刀直线切割试验反推岩石强度。从隧道工程现场和岩石矿场采集单轴抗压强度为50~230 MPa的岩石试样共9批次,制备棒状和块状试样并分别开展单轴压缩、巴西劈裂和小尺度滚刀直线切割试验;选取其中7批次试验数据,分别得到单轴抗压强度、劈裂抗拉强度与直线切割试验的法向力均值、峰值及峰均值的拟合函数,用剩余2批次试验结果验证所得预测模型的准确性。结果表明:岩石单轴抗压强度与法向载荷的拟合相关系数大于0.9,劈裂抗拉强度与法向载荷的拟合相关系数大于0.8,说明岩石强度与切割载荷成强线性相关性;验证试验发现,利用法向力均值、峰均值验证时,岩石单轴抗压强度的预测值与试验值误差小于5%,劈裂抗拉强度的预测值与试验值误差小于10%,说明所建模型具有较高的准确性。使用本研究所提出的试验方法及所建模型,可以快速准确地预估岩石试样的强度,为室内试验时岩石采样和现场施工时岩石强度评估提供了一种有效的手段。

关键词: 滚刀破岩, 岩石强度, 直线切割试验, 缩尺试验, 预测模型

Abstract: In order to support geotechnical and rock sample selection in tunnel engineering and rock strength testing in on-site construction, the research used scaled linear cutting test to infer rock strength. A total of 9 batches of rock samples with uniaxial compressive strength of 50-230 MPa were collected from tunnel engineering sites and rock mines. Rod-shaped and block-shaped samples were prepared and subjected to uniaxial compression, Brazilian splitting and scaled linear cutting test respectively; selected 7 batches of test data to obtain the fitting functions of the uniaxial compressive strength, splitting tensile strength and normal force mean, peak value and peak mean value of the scaled linear cutting test, and used the remaining 2 batches of test results to verify the accuracy of the resulting prediction model. The results showed that the fitting correlation coefficients between rock uniaxial compressive strength and normal load were greater than 0.9, and the fitting correlation coefficients between splitting tensile strength and normal load were greater than 0.8, indicating that rock strength had a strong linear correlation with cutting load. The verification test found that when using the average normal force and the average peak value to verify, the error between the predicted value and the experimental value of the uniaxial compressive strength of the rock was less than 5%, and the error between the predicted value and the experimental value of the splitting tensile strength was less than 10%. It showed that the built model had high accuracy. Using the test methods and models proposed in this research, the strength of rock samples could be quickly and accurately estimated, which provided an effective means for rock sampling during indoor testing and rock strength assessment during on-site construction.

Key words: rock breaking by disc cutter, rock strength, linear cutting test, scaled test, predictive model

中图分类号: 

  • TU458+.3
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