三轴压缩作用下断续节理砂岩力学特性研究

邓华锋; 潘登; 许晓亮; 支永艳; 段玲玲; 杨超; 张宇娜

doi:10.11779/CJGE201911020

三轴压缩作用下断续节理砂岩力学特性研究 English Version

1. 三峡库区地质灾害教育部重点实验室(三峡大学),湖北宜昌 443002;
2. 中国市政工程中南设计研究总院有限公司,湖北武汉 430015

基金项目: 国家自然科学基金项目（51679127,51439003,41602301）; 三峡库区地质灾害教育部重点实验室（三峡大学）开放研究基金项目（2018KDZ04）

详细信息

作者简介:
邓华锋(1979— ),男,博士,教授,主要从岩土工程方面的教学与研究工作。E-mail：dhf8010@ctgu.edu.cn。

通讯作者:
许晓亮，E-mail：sichuan106@163.com

中图分类号: TU452
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出版历程
- 收稿日期: 2019-01-28
- 发布日期: 2019-11-24

Mechanical characteristics of intermittent jointed sandstone under triaxial compression

1. Key Laboratory of Geological Hazards in Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang 443002, China;
2. Central and Southern China Municipal Engineering Design &Research Institute Co. Ltd., Wuhan 430015, China

摘要

摘要: 节理岩体的力学特性直接影响工程岩体的安全。为了研究节理岩体的各向异性力学特性和破坏特征,设计进行了0°,30°,45°,60°,75°和90°等6种角度断续节理砂岩的三轴压缩试验,详细分析了节理倾角对断续节理岩体变形强度特征和破坏模式的影响。研究结果表明：①在加载过程中,随着围压增大,断续节理砂岩应力-应变曲线的屈服阶段逐渐明显,峰值强度和残余强度逐渐提高,破坏时延性特征逐渐明显;②随着节理倾角增大,断续节理砂岩的变形模量、抗压强度、黏聚力和内摩擦角等力学参数均呈现先减小后增大的U型变化趋势;③节理对岩样破坏裂纹的形成与开展具有明显的诱导和控制作用,不同倾角岩样的破裂面均顺节理倾角方向发展,当节理倾角与岩样计算破坏角接近的时候,岩样的破裂面顺节理面开展,变形和强度参数达到极小值;④随着围压增大,不同倾角断续节理岩样的变形和强度参数差别逐渐减小,各向异性特征逐渐减弱;⑤断续节理砂岩的破坏模式可分为张拉破坏、折线型的复合剪张破坏、沿节理面剪切破坏等3种类型,节理倾角的分布决定了断续节理砂岩在加载作用下的变形破坏模式,变形破坏模式的差异决定了断续节理砂岩变形和强度参数的各向异性特征。研究成果可为工程中节理岩体的各向异性特征分析提供较好的参考。
- 断续节理 /
- 节理倾角 /
- 各向异性 /
- 力学特性 /
- 破坏模式
Abstract: The mechanical properties of intermittent jointed rock mass directly affect the safety of engineering rock mass. In order to study its anisotropic mechanical properties and failure characteristics, the triaxial compression tests on the intermittent jointed sandstones with 6 joint inclination angles, 0°, 30°, 45°, 60°, 75° and 90°, are performed, and the effects of joint dip angle on the characteristics of deformation strength and failure modes of rock mass are analyzed. The results indicate that: (1) With the increase of confining pressure, the yield phase of stress-strain curve of intermittent jointed sandstone gradually becomes obvious, the peak and residual strengths gradually increase, and the characteristics of ductility are gradually obvious during destruction. (2) With the increase of joint dip, the deformation modulus, compressive strength, cohesion and internal friction angle of rock samples all present U-pattern change. (3) The joints have obvious induction and control effects on the formation and development of rock failure cracks. The fracture surfaces of the rock samples with different joint dip angles develop along the joint dip angle. When the joint dip angle is close to the calculated fracture one of the rock sample, the fracture surface of the rock sample is developed along the joint surface, and the deformation and strength parameters reach the minimum values. (4) With the increase of confining pressure, the difference of deformation and strength parameters of joints with different dip angles gradually decreases, and the anisotropy gradually weakens. (5) The failure modes of the intermittent jointed sandstone can be divided into three types: tensile failure, compound shear failure of fold line, and shear failure of joint surface, and the distribution of joint dip determines the deformation failure mode of sandstone under intermittent loading. The difference in deformation and failure modes determines the anisotropic characteristics of deformation and strength.

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参考文献(32)

[1]	王士天, 刘汉超, 张倬元. 大型水域水岩相互作用及其环境效应研究[J]. 地质灾害与环境保护, 1997, 8(1): 69-88. (WANG Shi-tian, LIU Han-chao, ZHANG Zhuo-yuan.Study on interaction and environmental effects of water rocks in large water bodies[J]. Journal of Geological Hazard and Environmental Preservation, 1997, 8(1): 69-88. (in Chinese))
[2]	孙广忠. 岩体结构力学[M]. 北京: 科学出版社, 1988. (SUN Guang-zhong.The foundation of mechanics on rock mass structure[M]. Beijing: Science Press, 1988. (in Chinese))
[3]	MÜLLER L. Rock mechanics[M]. Beijing: China Coal Industry Publishing House, 1981.
[4]	肖维民, 邓荣贵, 付小敏, 等. 单轴压缩条件下柱状节理岩体变形和强度各向异性模型试验研究[J]. 岩石力学与工程学报, 2014, 33(5): 957-963. (XIAO Wei-min, DENG Rong-gui, FU Xiao-min, et al.Model experiments on deformation and strength anisotropy of columnar jointed rock masses under uniaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(5): 957-963. (in Chinese))
[5]	孙旭曙, 李建林, 王乐华, 等. 节理岩体超声测试及单轴压缩试验研究[J]. 岩土力学, 2014, 35(12): 3473-3478, 3488. (SUN Xu-shu, LI Jian-lin, WANG Le-hua, et al.Study of ultrasonic test and uniaxial compression test of jointed rock masses[J]. Rock and Soil Mechanicals, 2014, 35(12): 3473-3478, 3488. (in Chinese))
[6]	孙旭曙, 李建林, 王乐华, 等. 单一预制节理试件各向异性力学特性试验研究[J]. 岩土力学, 2014, 35(增刊1): 29-34, 41. (SUN Xu-shu, LI Jian-lin, WANG Le-hua, et al.Experimental research on anisotropic mechanical characteristic of samples with single prefabricated joint[J] Rock and Soil Mechanicals, 2014, 35(S1): 29-34, 41. (in Chinese))
[7]	李建林, 王乐华, 孙旭曙, 等. 节理岩体卸荷各向异性力学特性试验研究[J]. 岩石力学与工程学报, 2014, 33(5): 892-900. (LI Jian-lin, WANG Le-hua, SUN Xu-shu, et al.Experimental study on anisotropic mechanical characteristics of jointed rock masses under unloading condition[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(5): 892-900. (in Chinese))
[8]	王芝银, 段品佳. 基于岩体三轴压缩试验的节理力学参数确定方法[J]. 岩土力学, 2011, 32(11): 3219-3224. (WANG Zhi-yin, DUAN Pin-jia.A new method for determining mechanical parameters of joints based on triaxial compressive test for rock mass[J]. Rock and Soil Mechanicals, 2011, 32(11): 3219-3224. (in Chinese))
[9]	王乐华, 柏俊磊, 李建林, 等. 非贯通节理岩体单轴压缩试验研究[J]. 水利学报, 2014, 45(12): 1410-1418. (WANG Lei-hua, BAI Jun-lei, LI Jian-lin, et al.Experimental study on uniaxial compression of rocks with non-through joints[J]. Journal of Hydraulic Engineering, 2014, 45(12): 1410-1418. (in Chinese))
[10]	王乐华, 柏俊磊, 孙旭曙, 等. 不同连通率节理岩体三轴加卸荷力学特性试验研究[J]. 岩石力学与工程学报, 2015, 34(12): 2500-2508. (WANG Le-hua, BAI Jun-lei, SUN Xu-shu, et al.The triaxial loading and unloading mechanical properties of jointed rock masses with different joint connectivities[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(12): 2500-2508. (in Chinese))
[11]	BOBET A, EINSTEIN H H.Fracture coalescence in rock-type material under uniaxial and biaxial compressions[J]. International Journal of Rock Mechanics and Mining Sciences, 1998, 35(7): 863-888.
[12]	WONG R H C, CHAU K T, TANG C A, et al. Analysis of crack coalescence in rock-like materials containing three flaws: part I experimental approach[J]. International Journal of Rock Mechanics and Mining Sciences, 2001, 38(7): 909-924.
[13]	GEHLE C, KUTTER H K.Breakage and shear behaviour of intermittent rock joints[J]. International Journal of Rock Mechanics and Mining Sciences, 2003, 40(5): 687-700.
[14]	陈洪凯, 唐红梅. 危岩主控结构面强度参数计算方法[J]. 工程地质学报, 2008, 16(1): 37-41. (CHEN Hong-kai, TANG Hong-mei.Method for calculating strength parameters of structural planes controlling the rock block stablity[J]. Journal of Engineering Geology, 2008, 16(1): 37-41. (in Chinese))
[15]	张黎明, 陈国庆, 李志波, 等. 共面断续岩桥直剪试验破坏过程研究[J]. 长江科学院院报, 2018, 35(10): 120-125, 142. (ZHANG Li-ming, CHEN Guo-qing, LI Zhi-bo, et al.Failure process of coplanar discontinuous rock bridge in direct shear test[J]. Journal of Yangtze River Scientific Research Institute, 2018, 35(10): 120-125, 142. (in Chinese))
[16]	蒲成志, 曹平, 赵延林, 等. 单轴压缩下多裂隙类岩石材料强度试验与数值分析[J]. 岩土力学, 2010, 31(11): 3661-3666. (PU Cheng-zhi, CAO Ping, ZHAO Yan-lin, et al.Numerical analysis and strength experiment of rock-like materials with multi-fissures under uniaxial compression[J]. Rock and Soil Mechanics, 2010, 31(11): 3661-3666. (in Chinese))
[17]	周辉, 孟凡震, 张传庆, 等. 不同位置和尺寸的裂隙对岩体破坏影响的试验研究[J].岩石力学与工程学报, 2015, 34(增刊1): 3018-3028. (ZHOU Hui, MENG Fan-zhen, ZHANG Chuan-qing, et al.Experimental study on effect of joints with different locations and sizes on rock failure[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(S1): 3018-3028. (in Chinese))
[18]	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 Xin, LIAO Zhi-hong, LI De-jian.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))
[19]	段国勇. 特定角度组合节理岩体卸荷力学特性试验研究[D]. 宜昌: 三峡大学, 2015. (DUAN Guo-yong, Experimental research on mechanical properties of specific combined angel jointed rock mass uder loading and unloading condition[D]. Yichang: China Three Gorges University, 2015. (in Chinese))
[20]	黄书岭, 丁秀丽, 邬爱清, 等. 层状岩体多节理本构模型与试验验证[J]. 岩石力学与工程学报, 2012, 31(8): 1627-1635. (HUAN Shu-ling, DING Xiu-li, WU Ai-qing, et al.Study of multi-joint constitutive model of layered rockmass and experimental verification[J]. Chinese Journal of Geotechnical Engineering, 2012, 31(8): 1627-1635. (in Chinese))
[21]	葛云峰, 唐辉明, 王亮清, 等. 大数量非贯通节理岩体离散元数值模拟实现方法研究[J]. 岩石力学与工程学报, 2017, 36(增刊2): 3760-3773. (GE Yu-feng, TANG Hui-ming, WANG Liang-qing, et al.Realization method of discrete element numerical simulation of large number of non-persistent jointed rock mass[J] Chinese Journal of Rock Mechanics and Engineering, 2017, 36(S2): 3760-3773. (in Chinese))
[22]	孟国涛, 方丹, 李良权, 等. 含优势断续节理组的工程岩体等效遍布节理模型强度参数研究[J]. 岩石力学与工程学报, 2013, 32(10): 2115-2121. (MENG Guo-tao, FANG Dan, LI Liang-quan, et al.Study of equivalent strength parameters of ubiquitous joint model for engineering rock mass with preferred intermittent joints[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(10): 2115-2121. (in Chinese))
[23]	梁正召, 肖东坤, 李聪聪, 等. 断续节理岩体强度与破坏特征的数值模拟研究[J]. 岩土工程学报, 2014, 36(11): 2086-2095. (LIANG Zheng-zhao, XIAO Dong-kun, LI Cong-cong, et al.Numerical study on strength and failure modes of rock mass with discontinuous joints[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(11): 2086-2095. (in Chinese))
[24]	卞康, 刘建, 胡训健, 等. 含顺层断续节理岩质边坡地震作用下的破坏模式与动力响应研究[J]. 岩土力学, 2018, 39(8): 3029-3037. (BIAN Kang, LIU Jian, HU Xun-jian, et al.Study on failure mode and dynamic response of rock slope with non-persistent joint under earthquake[J] Rock and Soil Mechanics, 2018, 39(8): 3029-3037. (in Chinese))
[25]	徐靖南, 朱维申. 压剪应力作用下共线裂纹的强度判定[J]. 岩石力学与工程学报, 1995, 14(4): 306-311. (XU Jing-nan, ZHU Wei-shen.The strength of collinear cracks failure under shearing-compressive stress[J]. Chinese Journal of Rock Mechanics and Engineering, 1995, 14(4): 306-311. (in Chinese))
[26]	LAJTAI E Z.Strength of discontinuous rocks in direct shear[J]. Géotechnique, 1969, 19(2): 218-233.
[27]	EINSTEIN H E, BENIEZIANO D, BAECHER G B, et al.The effect of discontinuity persistence on rock slope stability[J]. International Journal of Rock Mechanics and Mining Science, 1983, 20(3): 227-236.
[28]	杜景灿, 陈祖煜. 岩桥破坏的简化模型及在节理岩体模拟网络中的应用[J]. 岩土工程学报, 2002, 24(4) : 421-426. (DU Jing-can, CHEN Zu-yu.A simplified discontinuity propagation model and its application in mechanics of rock mass[J]. Chinese Journal of Geotechnical Engineering, 2002, 24(4): 421-426. (in Chinese))
[29]	刘远明, 夏才初. 共面闭合非贯通节理岩体贯通机制和破坏强度准则研究[J]. 岩石力学与工程学报, 2006, 25(10): 2086-2091. (LIU Yuan-ming, XIA Cai-chu.Study on fracture mechanism and criteria of failure strength of rock mass containing coplanar close discontinuous joints under direct shear[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(10): 2086-2091. (in Chinese))
[30]	GB/T 50266—201 工程岩体试验方法标准[S]. 2013. (GB/T 50266—2013 Standard for test methods of engineering rock mass[S]. 2013. (in Chinese))
[31]	邓华锋, 李建林, 邓成进, 等. 岩石力学试验中试样选择和抗压强度预测方法研究[J]. 岩土力学, 2011, 32(11): 3399-3403. (DENG Hua-feng, LI Jian-lin, DENG Cheng-jin, et al.Analysis of sampling in rock mechanics test and compressive strength prediction methods[J]. Rock and Soil Mechanics, 2011, 32(11): 3399-3403. (in Chinese))
[32]	SINGH J, RAMAMURTHY T, RAO G V.Strength anisotropies in rocks[J]. Indian Geotechnical Journal, 1989, 19(2): 147-66.

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