人工单节理砂岩的三轴试验研究
Triaxial compression test on sandstone specimen with single artificial joint
-
摘要: 采用云石胶黏结岩块的方法制备人工节理面，通过直剪试验获得人工节理面的抗剪强度特性，基于完整和单节理砂岩的常规三轴试验，分析不同倾角（0°，30°，60°，90°）对单节理岩体试样力学响应的影响。结果表明：人工节理面在直剪试验中呈现脆性破坏，其抗剪强度符合M-C准则；不同围压下（2.5，5 0和7.5 MPa）完整砂岩的破坏形态和弹性模量基本相同，峰值强度随围压增大；相同围压下（2.5 MPa）不同倾角单节理岩体的破坏形态、弹性模量、峰值强度均不相同，单节理岩体试样的峰值强度-倾角曲线呈反对号“”形，节理倾角对岩体力学性质的影响明显，其中60°节理岩体试样的强度最低,仅为完整岩石强度的19.7%。推导了过圆柱体试样中心任意斜截面内力的三维计算公式，根据其理论预测所得完整岩石的破裂面角度和60°节理试样的破坏方式均与试验结果相符，其吻合度较传统的二维分析更高。Abstract: The bonding interface of two intact rocks bonded by epoxy adhesive is taken as an artificial joint, the shearing strength characteristics of the artificial joint is obtained by direct shearing tests, and the behaviors of intact sandstone specimen and sandstone specimen with the single artificial joint (the angle between the joint plane and the minor principal stress are 0°, 30°, 60° and 90°, respectively) are analyzed based on the triaxial test results. The results show that the shearing failure mode of the artificial joint shows brittleness damage in the direct shearing tests, and the shear strength meets the Mohr-Coulomb theory. The failure modes and Young’s modulus of intact rocks are similar under different confining pressures (2.5, 5 0 and 7.5 MPa), and the peak strength increases with the increasing confining pressure. The failure modes, Young’s modulus and peak strengths of the sandstone specimen with the single artificial joint of different angles are different under the contact confining pressure of 2.5 MPa, the curve of peak strength and joint inclination angle is in the shape of anti-tick (), and the strength of 60° jointed specimen is only 19.7% of that of intact rocks, indicating that the angle of the artificial joint significantly affects the characteristics of rock mass. 3D calculation formulas for the section internal force through the center of the column specimen are derived. Theoretical analyses of the failure modes of intact rocks and 60° jointed specimen are consistent with the experimental results. The matching degree of theoretical analyses and experimental results is higher than that by the traditional 2D calculation formula.
-
-
[1] ［1］朱维申,周浩,李邦翔,等.节理岩体剪切试验的非连续变形方法分析［J］. 水文地质工程地质，2015，42（5）：49-53 ［ZHU W S, ZHOU H, LI B X, et al. DDARF analysis of ahear tests of jointed rock mass［J］. Hydrogeology & Engineering Geology, 2015, 42(5):49-53 (in Chinese)］
[2] ［2］张志刚,乔春生,李晓.单节理岩体强度试验研究［J］.中国铁道科学,2007,28(4):34-39 ［ZHANG Z G, QIAO C S, LI X. Experimental study on the strength of single joint rock mass［J］. China Railway Science, 2007, 28(4): 34-39 (in Chinese)］
[3] ［3］Ranjith P G, Fourar M, Pong S F, et al. Characterisation of fractured rocks under uniaxial loading states［J］. International Journal of Mining Science and Technology, 2004, 41(3):1-6
[4] ［4］王在泉,张黎明,孙辉.含天然节理灰岩加、卸荷力学特性试验研究［J］.岩石力学与工程学报,2010,29(增刊1):3308 -3313 ［WANG Z Q, ZHANG L M, SUN H. Experimental research on mechanical properties of limestone containing natural joints under loading and unloading conditions［J］. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(Sup 1): 3308-3313 (in Chinese)］
[5] ［5］宋彦琦, 李名, 刘江, 等. 含不同倾角天然软弱夹层的大理岩破坏试验［J］. 中国矿业大学学报, 2015, 44(4): 623-629 ［SONG Y Q, LI M, LIU J, et al. Experimental test on marble containing natural weak interlayer of different angles［J］. Journal of China University of Mining & Technology, 2015, 44(4): 623-629 (in Chinese)］
[6] ［6］李宏哲, 夏才初, 王晓东, 等. 含节理大理岩变形和强度特性的试验研究［J］.岩石力学与工程学报, 2008, 27(10):2118-2123 ［LI H Z, XIA C C, WANG X D, et al. Experimental study on deformation and strength properties of jointed marble specimens［J］. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(10):2118-2123 (in Chinese)］
[7] ［7］Zuo Jianping, Wang Zhaofeng, Zhou Hongwei, et al. Failure behavior of a rock-coal-rock combined body with a weak coal interlayer［J］. International Journal of Mining Science and Technology, 2013, 23(6):907-912
[8] ［8］Yang S Q, Jiang Y Z, Xu W Y, et al. Experimental investigation on strength and failure behavior of pre-cracked marble under conventional triaxial compression［J］. International Journal of Solids and Structures, 2008, 45: 4796-4819
[9] ［9］Heekwang Lee, Seokwon Jeon. An experimental and numerical study of fracture coalescence in pre-cracked specimens under uniaxial compression［J］. International Journal of Solids and Structures, 2011, 48: 979-999
[10] ［10］王谦源,李晔.分形节理岩体强度与变形尺度效应的试验研究［J］.岩土力学, 2008, 29 (5): 1325-1328 ［WANG Q Y, LI Y. Experimental study of scale effects in strength and deformation of fractal-joint rock masses［J］. Rock and Soil Mechanics, 2008, 29 (5): 1325-1328 (in Chinese)］
[11] ［11］陈新, 廖志红, 李德建. 节理倾角及连通率对岩体强度变形影响的单轴压缩试验研究［J］.岩石力学与工程学报, 2011, 30 (4): 781-789 ［CHEN X, LIAO Z H, LI D J. Experimental study of effects of joint inclination angle and connectivity rate on strength and deformation properties of rock masses under uniaxial compression［J］. Chinese Journal of Rock Mechanics and Engineering, 2011, 30 (4): 781-789 (in Chinese)］
[12] ［12］张波, 李术才, 张敦福, 等. 含充填节理岩体相似材料试件单轴压缩试验及断裂损伤研究［J］. 岩土力学, 2012, 33 (6): 1647-1652 ［ZHANG B, LI S C, ZHANG D F, et al. Uniaxial compression mechanical property test, fracture and damage analysis of similar material of jointed rock mass with filled cracks［J］. Rock and Soil Mechanics, 2012, 33 (6): 1647-1652 (in Chinese)］
[13] ［13］Hadi Haeri, Kourosh Shahriar, Mohammad Fatehi Marji, et al. Experimental and numerical study of crack propagation and coalescence in pre-cracked rock-like disks［J］. International Journal of Rock Mechanics and Mining Sciences, 2014, 67: 20-28
[14] ［14］胡卸文, 伊小娟, 王帅雁, 等. 不同三轴应力途径下红砂岩力学特性试验研究［J］. 水文地质工程地质, 2009, 36(4):57-61 ［HU X W, YI X J, WANG S Y, et al. Study on red sandstone mechanical property under different stress path by triaxial test［J］. Hydrogeology & Engineering Geology, 2009, 36(4):57-61 (in Chinese)］
[15] ［15］徐永福,孙长龙,俞鸿年.常温下砂岩的变形特征及其影响因素［J］.岩土力学,1995,16(1):61-63 ［XU Y F, SUN C L, YU H N. Deformation characteristics of sandstone under normal temperature and affecting factors［J］. Rock and Soil Mechanics, 1995, 16(1):61-63 (in Chinese)］
[16] ［16］苏承东, 付义胜. 红砂岩三轴压缩变形与强度特征的试验研究［J］. 岩石力学与工程学报, 2014, 33(增刊1):3164 -3169 ［SU C D, FU Y S. Experimental study of triaxial compression deformation and strength characteristics of red sandstone［J］. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(Sup1):3164-3169 (in Chinese)］
[17] ［17］郭靓. 节理岩体变形与强度特征的三维数值模拟［D］.北京:北京交通大学, 2009 ［GUO L. Three-dimensional numerical simulation of the deformation and strength characters of jointed rock mass［ D］. Beijing: Beijing Jiaotong University,2009 (in Chinese)］
-
期刊类型引用(17)
1. 徐志华，郭戈，孙钱程，丰光亮，何钰铭，谢迪. 改进的区域生长算法在三维激光点云识别岩体结构面中的应用. 水文地质工程地质. 2024(02): 101-112 . 
本站查看
2. 冉淑红，郑艺龙，张长敏，贺瑾瑞，郝春燕，杨博，吴家悦，于兆林，张文丽. 基于地面三维激光扫描的南港危岩崩塌稳定性评价. 城市地质. 2024(01): 9-19 . 百度学术
3. 党杰，董吉，何松标，范宣梅. 机载LiDAR与地面三维激光扫描在贵州水城独家寨崩塌地质灾害风险调查中的应用. 中国地质灾害与防治学报. 2022(04): 106-113 . 百度学术
4. 刘伟鹏，吴光，张广泽. 三维激光扫描在高陡边坡勘察中的测距分析. 铁道勘察. 2021(03): 10-16 . 百度学术
5. 郝中峰，岳仁宾. 激光点云在滑塌式危岩体稳定性评价方面的应用. 北京测绘. 2020(06): 810-813 . 百度学术
6. 贺凯，高杨，殷跃平，李滨. 基于岩体损伤的大型高陡危岩稳定性评价方法. 水文地质工程地质. 2020(04): 82-89 . 本站查看
7. 吴运通，朱金来，许蕴宝，于帅印，林牧，赵海阔. 基于三维激光扫描技术的库岸变形监测与分析——以西藏某水库为例. 水利技术监督. 2020(05): 303-308 . 百度学术
8. 罗路广，裴向军，黄润秋，裴钻. 冰缘地区岩质斜坡冻融侵蚀时空分异特征与产屑率研究. 工程地质学报. 2020(06): 1319-1328 . 百度学术
9. 王梓龙，裴向军，张御阳，刘明，张硕，肖华波. 楞古水电站厂址区岩体松动类型研究. 水利水电技术. 2019(03): 169-178 . 百度学术
10. 汪丽，张军平. 基于三维激光点云数据的建筑基坑施工优化研究. 激光杂志. 2019(09): 112-116 . 百度学术
11. 李晋，覃事胜，刘新惠，张弛. 张家界大峡谷景区危岩体发育规律与防治建议. 地质灾害与环境保护. 2019(03): 48-52 . 百度学术
12. 王梓龙，裴向军，张御阳，张硕，魏小佳，王双. 松动岩体工程特性研究——以雅砻江楞古水电站松动岩体为例. 吉林大学学报(地球科学版). 2019(05): 1376-1388 . 百度学术
13. 朱赞，甘淑，袁希平，周新瑞，苏文豪，杨敏. 三维激光扫描技术对岩溶区公路滑坡要素提取. 测绘科学. 2019(11): 67-73 . 百度学术
14. 阮建军. 高危边坡三维激光扫描技术数据采集及处理. 西部资源. 2018(04): 160-161 . 百度学术
15. 白立飞. 基于三维激光扫描技术在滑坡监测中的应用研究. 智能城市. 2018(01): 16-17 . 百度学术
16. 王建. 三维激光扫描技术在溶洞测量中的运用. 低碳世界. 2017(09): 73-74 . 百度学术
17. 明国辉. 三维激光扫描技术在高边坡监测中的应用研究. 工程建设与设计. 2016(18): 193-195 . 百度学术
其他类型引用(11)
计量
- 文章访问数: 1102
- HTML全文浏览量: 11
- PDF下载量: 641
- 被引次数: 28
下载:
邮件订阅
RSS