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| Experimental study on deformation and failure characteristics of saturated sandstone under graded cyclic loading and unloading |
| YUAN Hechuan1，2，Abi Erdi1，ZHANG Jie3，CONG Yu4，LIU Mingwei1，2，PU Yunjie1，2，LIN Haotian1，2 |
(1. Key Laboratory of Geological Hazards Mitigation for Mountainous Highway and Waterway，Chongqing Jiaotong University，Chongqing 400074，China；2. PowerChina Guiyang Engineering Corporation Limited，Guiyang，Guizhou 550081，China；
3. College of Engineering，Xizang University，Lhasa，Xizang 850013，China；4. School of Civil Engineering，
Qingdao University of Technology，Qingdao，Shandong 266033，China) |
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Abstract For water-rich tunnel in different construction stages under variable amplitude load disturbance of surrounding rock damage problem，by conducting graded loops and unloading test，analysis of loops and unloading stress-strain hysteresis curve，in the process of rock deformation parameters and macro fracture characteristics，revealing the grading loops and uninstall the deformation and failure regularity of saturated sandstone. The results show that with the increase of loading amplitude，the migration of hysteresis loop decreases first and then increases，the area of hysteresis loop increases step by step，and the axial strain of hysteresis loop develops as“sparse-dense-sparse”. The elastic modulus decreases step by step in the form of“sudden drop-slow drop-accelerated drop”，and Poisson?s ratio changes in the form of“step by step drop-relatively stable-rise”. The confining pressure increases the stiffness and deformation resistance of rock samples，the overall elastic modulus，the initial Poisson?s ratio，and the residual strain increase，but the weakening effect is obvious under the cyclic loading and unloading of the late yield section. The faster the loading rate is，the more obvious the load meshing friction effect is，the greater the average loading and unloading modulus is，and the less the irreversible deformation of the rock sample is，but the Poisson effect is not obvious. With the increase of confining pressure，the failure of sandstone changes from tension shear composite failure to compression shear failure；The smaller the load rate is，the more developed the main fracture is，the higher the penetration degree is，and the greater the scouring degree of the fracture surface is. The deformation and failure law of saturated sandstone revealed by the study has significant reference value for the deformation，damage and stability analysis of surrounding rock of rich water tunnel.
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[1] TAHERI A，ROYLE A，YANG Z，et al. Study on variations of peak strength of a sandstone during cyclic loading[J]. Geomechanics and Geophysics for Geo-Energy and Geo-Resources，2016，2(1)：1–10.
[2] BIENIAWSKI Z T. Time-dependent behaviour of fractured rock[J]. Rock Mechanics Felsmechanik Mécaniquedes Roches，1970，2(3)：123–137.
[3] BAI M，ELSWORTH D. Analytical solution. coupled processes in subsurface deformation，flow，and transport[M]. Reston：ASCE Press，2000：163–213.
[4] 周 辉，胡大伟，张 凯，等. 高渗透压下孔隙和裂隙岩石流固耦合机理与理论初步[M]. 北京：科学出版社，2014：82–95.(ZHOU Hui，HU Dawei，ZHANG Kai，et al. Mechanism and theory of fluid-solid coupling of pore and fissured rocks under high osmotic pressure[M]. Beijing：Science Press，2014：82–95.(in Chinese))
[5] RUTQVIST J，STEPHANSSON O. The role of hydromechanical coupling in fractured rock engineering[J]. Hydrogeology Journal，2003，11(1)：7.
[6] 张 英，李 鹏，郭奇峰，等. 水力耦合裂隙岩体变形破坏机制研究进展[J]. 哈尔滨工业大学学报，2020，52(6)：21–41.(ZHANG Ying，LI Peng，GUO Qifeng，et al. Research progress of deformation and failure mechanism in fractured rock mass under hydromechanical coupling[J]. Journal of Harbin Institute of Technology，2020，52(6)：21–41.(in Chinese))
[7] 陆银龙. 渗流–应力耦合作用下岩石损伤破裂演化模型与煤层底板突水机理研究[博士学位论文][D]. 徐州：中国矿业大学，2013. (LU Yinlong. Hydro-mechanical modeling of fracturing evolution in rocks and mechanism of water-inrush from coal seam floor[Ph. D. Thesis][D]. Xuzhou：China University of Mining and Technology，2013.(in Chinese))
[8] ZHANG Z，XIE H，RU Z，et al. Deformation damage and energy evolution characteristics of coal at different depths[J]. Rock Mechanics and Rock Engineering，2018，52：1–13.
[9] 周小平，哈秋聆，张永兴，等. 峰前围压卸荷条件下岩石的应力一应变全过程分析和变形局部化研究[J]. 岩石力学与工程学报，2005，24(18)：3 236–3 245.(ZHOU Xiaoping，HA Qiuling，ZHANG Yongxing，et al. Analysis of localization of deformation and complete stress-strain relation for mesoscopic heterogenous brittle rock materials when axial stress is held constant while lateral confinement is reduced[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(18)：3 236–3 245.(in Chinese))
[10] 李地元，孙 志，李夕兵，等. 不同应力路径下花岗岩三轴加卸载力学响应及其破坏特征[J]. 岩石力学与工程学报，2016，35(增2)：3 449–3 457.(LI Diyuan，SUN Zhi，LI Xibing，et al. Mechanical response and failure characteristics of granite under different stress paths in triaxial loading and unloading conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(Supp.2)：3 449–3 457. (in Chinese))
[11] 刘立鹏，汪小刚，贾志欣，等. 锦屏二级水电站大理岩复杂加卸载应力路径力学特性研究[J]. 岩土力学，2013，34(8)：2 287–2 294. (LIU Lipeng，WANG Xiaogang，JIA Zhixin，et al. Experiment study of marble mechanical properties of Jinping II hydropower station under complex loading and unloading conditions[J]. Rock and Soil Mechanics，2013，34(8)：2 287–2 294.(in Chinese))
[12] 苏承东，李怀珍，张 盛，等. 应变速率对大理岩力学特性影响的试验研究[J]. 岩石力学与工程学报，2013，23(5)：943–950.(SU Chengdong，LI Huaizhen，ZHANG Sheng，et al. Experimental investigation on effect of strain rate on mechanical characteristics of marble[J]. Chinese Journal of Rock Mechanics and Engineering，2013，23(5)：943–950.(in Chinese))
[13] 朱杰兵. 高应力下岩石卸荷及其流变特性研究[博士学位论文][D]. 武汉：中国科学院武汉岩土力学研究所，2009.(ZHU Jiebing. Study on unloading mechanics and its reological properties of rock under high strsss[Ph. D. Thesis][D]. Wuhan：Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，2009.(in Chinese))
[14] 苏承东，熊祖强，翟新献，等. 三轴循环加卸载作用下煤样变形及强度特征分析[J]. 采矿与安全工程学报，2014，31(3)：456–461. (SU Chengdong，XIONG Zuqiang，ZHAI Xinxian，et al. Analysis of deformation and strength characteristics of coal samples under the triaxial cyclic loading and unloading stress path[J]. Journal of Mining and Safety Engineering，2014，31(3)：456–461.(in Chinese))
[15] 徐 鹏，周剑波，黄 俊. 循环加卸载下大理岩损伤与能量演化特征[J]. 长江科学院院报，2020，37(3)：90–95.(XU Peng，ZHOU Jianbo，HUANG Jun. Damage evolution and strain energy characteristic of marble under triaxial cyclic compression[J]. Journal of Yangtze River Scientific Research Institute，2020，37(3)：90–95.(in Chinese))
[16] 郭军杰，邹友平，程晓阳，等. 循环载荷下煤体变形及渗透性变化特征实验研究[J]. 煤炭工程，2019，51(2)：82–86.(GUO Junjie，ZOU Youping，CHENG Xiaoyang，et al. Experimental study on the characteristics of deformation and permeability variation of coal samples under cyclic loading[J]. Coal Engineering，2019，51(2)：82–86.(in Chinese))
[17] 赵 军，郭广涛，徐鼎平，等. 三轴及循环加卸载应力路径下深埋硬岩变形破坏特征试验研究[J]. 岩土力学，2020，41(5)：1 521– 1 530.(ZHAO Jun，GUO Guangtao，XU Dingping，et al. Experimental study of deformation and failure characteristics of deeply-buried hard rock under triaxial and cyclic loading and unloading stress paths[J]. Rock and Soil Mechanics，2020，41(5)：1 521–1 530.(in Chinese))
[18] 蔡燕燕，唐 欣，林立华，等. 疲劳荷载下大理岩累积损伤过程的应变速率响应[J]. 岩土工程学报，2020，42(5)：827–836.(CAI Yanyan，TANG Xin，LIN Lihua，et al. Strain rate response of damage accumulation of marble under fatigue loading[J]. Chinese Journal of Geotechnical Engineering，2020，42(5)：827–836.(in Chinese))
[19] 苗胜军，王 辉，杨鹏锦，等. 近疲劳强度循环荷载对泥质石英粉砂岩力学特性影响研究[J]. 岩土力学，2021，42(8)：2 109–2 119. (MIAO Shengjun，WANG Hui，YANG Pengjin，et al. Effect of cyclic loading near fatigue strength on mechanical properties of argillaceous quartz siltstone[J]. Rock and Soil Mechanics，2021，42(8)：2 109– 2 119.(in Chinese))
[20] WANG S，ZHANG J，LI Z，et al. Seepage behaviour of fractured rock mass infilling using different transfixion rates under cyclic loading[J]. Geofluids，2021，2021(4)：1–15.
[21] 罗 可，招国栋，曾佳君，等. 加载速率影响的单裂隙类岩石试样能量演化规律[J]. 应用力学学报，2020，37(3)：1 151–1 159.(LUO Ke，ZHAO Guodong，ZENG Jiajun，et al. Energy evolution law of rock sample with single crack affected by loading rate[J]. Journal of Applied Mechanics，2020，37(3)：1 151–1 159.(in Chinese))
[22] MENG Q，ZHANG M，ZHANG Z，et al. Experimental research on rock energy evolution under uniaxialcyclic loading and unloading compression[J]. Geotechnical Testing Journal，2018，41：20170233.
[23] MENG Q，ZHANG M，HAN L，et al. Effects of acoustic emission and energy evolution of rock specimens under the uniaxial cyclic loading and unloading compression[J]. Rock Mechanics and Rock Engineering，2016，49(10)：1–14.
[24] ZHAO H，SONG Z，ZHANG D，et al. True triaxial experimental study on mechanical characteristics and energy evolution of sandstone under various loading and unloading rates[J]. Geomechanics and Geophysics for Geo-Energy and Geo-Resources，2021，7(1)：1–17.
[25] 基姆弗兰克林，张受天. 国际岩石力学学会试验方法委员会确定岩石应力的建议方法[J]. 岩石力学与工程学报，1988，7(4)：357–388. (KIM Franklin，ZHANG Shoutian. Proposed method for determination of rock stress by committee on test methods of international society of rock mechanics[J]. Chinese Journal of Rock Mechanics and Engineering，1988，7(4)：357–388.(in Chinese))
[26] 郑 虹，冯夏庭，陈祖煜. 岩石力学室内试验ISRM建议方法的标准化和数字化[J]. 岩石力学与工程学报，2010，29(12)：2 456– 2 468.(ZHENG Hong，FENG Xiating，CHEN Zuyu. Standardization and digitization for ISRM suggested methods of rock mechanics laboratory tests[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(12)：2 456–2 468.(in Chinese))
[27] 李 涛，马永君，刘 波，等. 循环荷载作用下冻结灰砂岩强度特征与弹性模量演化规律[J]. 煤炭学报，2018，43(9)：2 438–2 443. (LI Tao，MA Yongjun，LIU Bo，et al. Strength characteristics and elastic modulus evolution of frozen gray sandstone under cyclic loading[J]. Journal of China Coal Society，2018，43(9)：2 438–2 443. (in Chinese))
[28] 黄 虎，黄 凯，张献才，等. 循环荷载下胶凝砂砾石材料的滞后及阻尼效应[J]. 建筑材料学报，2018，21(5)：739–748.(HUANG Hu，HUANG Kai，ZHANG Xiancai，et al. Hysteresis and damping effect of cemented sand and gravel material under cyclic loading[J]. Journal of Building Materials，2018，21(5)：739–748.(in Chinese))
[29] BIOT M A. Theory of elasticity and consolidation for a porous anisotropic solid[J]. Journal of Applied Physics，1955，26(2)：182–185.
[30] XIAO W，YU G，LI H，et al. Experimental study on the failure process of sandstone subjected to cyclic loading and unloading after high temperature treatment[J]. Engineering Geology，2021，293：106 305.
[31] 杨小彬，程虹铭，吕嘉琦，等. 三轴循环荷载下砂岩损伤耗能比演化特征研究[J]. 岩土力学，2019，40(10)：3 751–3 757.(YANG Xiangbing，CHENG Hongming，LV Jiaqi，et al. Energy consumption ratio evolution law of sandstones under triaxial cyclic loading[J]. Rock and Soil Mechanics，2019，40(10)：3 751–3 757.(in Chinese))
[32] 侯文光，秦金辉. 动载荷下含水率对黄砂岩的分形特征及比表面能的影响[J]. 武汉工程大学学报，2021，43(3)：307–312.(HOU Wenguang，QIN Jinhui. Influence of water content on fractal characteristics and specific surface energy of yellow sandstone under dynamic loading[J]. Journal of Wuhan Institute of Technology，2021，43(3)：307–312.(in Chinese))
[33] 李天斌，陈子全，陈国庆，等. 不同含水率作用下砂岩的能量机制研究[J]. 岩土力学，2015，36(增2)：229–236.(LI Tianbin，CHEN Ziquan，CHEN Guoqing，et al. An experimental study of energy mechanism of sandstone with different moisture contents[J]. Rock and Soil Mechanics，2015，36(Supp.2)：229–236.(in Chinese))
[34] 杨春和，马洪岭，刘建锋. 循环加、卸载下盐岩变形特性试验研究[J]. 岩土力学，2009，30(12)：3 562–3 568.(YANG Chunhe，MA Hongling，LIU Jianfeng. Experimental study on deformation characteristics of salt rock under cyclic loading and unloading[J] Geotechnical Mechanics，2009，30(12)：3 562–3 568.(in Chinese))
[35] 姚吉康，王志亮，何爱林，等. 循环加卸载下花岗岩强度变形及声发射特征[J]. 水利水运工程学报，2018，(2)：74–81.(YAO Jikang，WANG Zhiliang，HE Ailin，et al. Strength and deformation along with acoustic emission characteristics of granite under cyclic loading and unloading[J]. Hydro-Science and Engineering，2018，(2)：74–81.(in Chinese))
[36] 张俊文，宋治祥. 深部砂岩三轴加卸载力学响应及其破坏特征[J]. 采矿与安全工程学报，2020，37(2)：409–418.(ZHANG Junwen，SONG Zhixiang. Mechanical response and failure characteristics of deep sandstone under triaxial loading and unloading[J]. Journal of Mining and Safety Engineering，2020，37(2)：409–418.(in Chinese))
[37] 宿 辉，刘 阔，王 翀，等. 3种不同粒径砂岩的强度与破坏特征[J]. 科学技术与工程，2021，21(26)：11 349–11 354.(SU Hui，LIU Kuo，WANG Chong，et al. The strength and failure characteristics of three kinds of sandstone with different particle sizes[J]. Science Technology and Engineering，2021，21(26)：11 349–11 354.(in Chinese))
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2023, Vol. 42 
