|
|
|
| Shear failure properties of sandstone with different moisture contents after cyclic freezing-thawing |
| HE Jingjing，SHI Junping |
| (Civil Engineering and Architecture College，Xi′an University of Technology，Xi′an，Shaanxi 710048，China) |
|
|
|
|
Abstract The experiment to investigate the shearing performance of sandstone at different moisture states after cyclic freezing-thawing was carried out. The shear failure mechanism of sandstone specimen was discussed. The variations of internal friction angle and cohesion with the fractal dimension of failure surface of sandstone specimen were analyzed. The results show that with the increasing of freezing-thawing cycles，the characteristics of shear stress-displacement curves of sandstone change obviously，meanwhile，the peak shear stresses decrease in varying degrees，but the shear displacements increase significantly. After the cyclic freezing-thawing，the internal friction angle and cohesion of sandstone are deteriorated differently，and the degree of deterioration increases gradually with the increasing of the degree of saturation. When the moisture content is the same，the relationship between the fractal dimension of failure surface and the number of freezing-thawing cycles is a power function，and the relationship between the cohesion damage factor and the fractal dimension is an exponential function. The relationship between damage factor of internal friction angle and fractal dimension is an exponential function in the dry state，but is linear function in the moisture state.
|
|
|
|
|
|
[1] 申艳军，杨更社，唐丽云，等. 2006～2015年“寒区岩土力学与工程”领域国家自然科学基金资助情况统计及发展趋势浅析[J]. 冰川冻土，2015，37(5)：1 294–1 303.(SHEN Yanjun，YANG Gengshe，TANG Liyun，et al. Development trend and statistics of the field of geotechnical mechanics and engineering in cold regions funded by NSFC during 2006—2015[J]. Journal of Glaciology and Geocryology，2015，37(5)：1 294–1 303.(in Chinese))
[2] KHANLARI G，SAHAMIEH R Z，ABDILOR Y. The effect of freeze–thaw cycles on physical and mechanical properties of upper red formation sandstones，central part of iran[J]. Arabian Journal of Geosciences，2015，8(8)：5 991–6 001.
[3] WALBERT C，ESLAMI J，BEAUCOUR A L，et al. Evolution of the mechanical behaviour of limestone subjected to freeze-thaw cycles[J]. Environmental Earth Sciences，2015，74(7)：6 339–6 351.
[4] GHOBADI M H，BABAZADEH R. Experimental studies on the effects of cyclic freezing-thawing，salt crystallization，and thermal shock on the physical and mechanical characteristics of selected sandstones[J]. Rock Mechanics and Rock Engineering，2015，48(3)：1 001–1 016.
[5] MARTÍNEZ M，BENAVENTE D，GOMEZ-HERAS M，et al. Non-linear decay of building stones during freeze-thaw weathering processes[J]. Construction and Building Materials，2013，38(1)：443–454.
[6] VLAHOU I，WORSTER M G. Ice growth in a spherical cavity of a porous medium[J]. Journal of Glaciology，2010，56(196)：271–277.
[7] 张慧梅，杨更社. 冻融与荷载耦合作用下岩石损伤模型的研究[J]. 岩石力学与工程学报，2010，29(3)：471–476.(ZHANG Huimen，YANG Gengshe. Research on damage model of rock under coupling action of freeze-thaw and load[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(3)：471–476.(in Chinese))
[8] 李新平，路亚妮，王仰君. 冻融荷载耦合作用下单裂隙岩体损伤模型研究[J]. 岩石力学与工程学报，2013，32(11)：2 307–2 315.(LI Xinping，LU Yani，WENG Yangjun. Research on damage model of single jointed rock masses under coupling action of freeze-thaw and loading[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(11)：2 307–2 315.(in Chinese))
[9] 刘泉声，黄诗冰，康永水，等. 岩体冻融疲劳损伤模型与评价指标研究[J]. 岩石力学与工程学报，2015，34(6)：1 116–1 127.(LIU Quansheng，HUANG Shibing，KANG Yongshui，et al. Fatigue damage model and evaluation index for rock mass under freezing-thawing cycles[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(6)：1 116–1 127.(in Chinese))
[10] 邓朝福，刘建锋，陈 亮，等. 不同含水状态花岗岩断裂力学行为及声发射特征[J]. 岩土工程学报，2017，39(8)：1 538–1 544.(DENG Chaofu，LIU Jianfeng，CHEN Liang，et al. Mechanical behaviors and acoustic emission characteristics of fracture of granite under different moisture conditions[J]. Chinese Journal of Geotechnical Engineering，2017，39(8)：1 538–1 544.(in Chinese))
[11] 李 男，徐 辉，胡 斌. 干燥与饱水状态下砂岩的剪切蠕变特性研究[J]. 岩土力学，2012，33(2)：439–443.(LI Nan，XU Hui，HU Bin. Shear creep characteristics of sandstone under dry and saturated states[J]. Rock and Soil Mechanics，2012，33(2)：439–443.(in Chinese))
[12] 程立朝，许 江，冯 丹，等. 岩石剪切破坏裂纹演化特征量化分析[J]. 岩石力学与工程学报，2015，34(1)：31–39.(CHENG Lichao，XU Jiang，FENG Dan，et al. Quantitative analysis on development of surface cracks of rocks upon shear failure[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(1)：31–39.(in Chinese))
[13] 彭守建，谭 虎，许 江，等. 渗透水压作用下完整砂岩剪切–渗流耦合试验研究[J]. 岩土力学，2017，38(8)：2 213–2 220.(PENG Shoujian，TAN Hu，XU Jiang，et al. Experimental study on shear-seepage of coupled properties for complete sandstone under the action of seepage water pressure[J]. Rock and Soil Mechanics，2017，38(8)：2 213–2 220.(in Chinese))
[14] LACROIX P，AMITRANO D. Long-term dynamics of rockslides and damage propagation inferred from mechanical modeling[J]. Journal of Geophysical Research-earth Surface，2013，118(4)：2 292–2 307.
[15] 徐拴海，李 宁，袁克阔，等. 融化作用下含冰裂隙冻岩强度特性及寒区边坡失稳研究现状[J]. 冰川冻土，2016，38(4)：1 106–1 120. (XU Shuanhai，LI Ning，YUAN Kekuo，et al. Strength behavior of frozen fractured ice-filled rock mass and research status of slope instability during thawing[J]. Journal of Glaciology and Geocryology，2016，38(4)：1 106–1 120.(in Chinese))
[16] 中华人民共和国行业标准编写组. DZ/T0276.25—2015岩石物理力学性质试验规程[S]. 北京：中国标准出版社，2015.(The Professional Standards Compilation Group of People?s Republic of China. DZ/T0276.25—2015 Regulation for testing the physical and mechanical properties of rock[S]. Beijing：Standards Press of China，2015.(in Chinese))
[17] 贺晶晶，师俊平. 冻融循环作用下砂岩三点弯曲断裂性能试验及其破坏形态研究[J]. 岩石力学与工程学报，2017，36(12)：2 917–2 925. (HE Jingjing，SHI Junping. Fracturing behavior and failure pattern of sandstone in three-point bending test under freezing-thawing cycles[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(12)：2 917–2 925.(in Chinese))
[18] 邓华锋，肖志勇，李建林，等. 水岩作用下损伤砂岩强度劣化规律试验研究[J]. 岩石力学与工程学报，2015，34(增1)：2 690–2 698. (DENG Hua，XIAO Zhiyong，LI Jianlin，et al. Deteriorating change rule test research of damage sandstone strength under water-rock interaction[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.1)：2 690–2 698.(in Chinese))
[19] 杨春和，冒海军，王学潮，等. 板岩遇水软化的微观结构及力学特性研究[J]. 岩土力学，2006，27(12)：2 090–2 098.(YANG Chunhe，MAO Haijun，WANG Xuechao，et al. Study on variation of microstructure and mechanical properties of water-weakening slates[J]. Rock and Soil Mechanics，2006，27(12)：2 090–2 098.(in Chinese))
[20] BRUNO M S，NAKAGAWA F M. Pore pressure influence on tensile fracture propagation in sedimentary rock[J]. International Journal of Rock Mechanics and Mining Sciences，1991，28(4)：261–273.
[21] 王海龙，李庆斌. 饱和混凝土静动力抗压强度变化的细观力学机理[J]. 水利学报，2006，37(8)：958–962.(WANG Hailong，LI Qingbin. Micro-mechanism of static and dynamic strengths for saturated concrete[J]. Journal of Hydraulic Engineering，2006，37(8)：958–962.(in Chinese))
[22] 尤明庆. 完整岩石的强度和强度准则[J]. 复旦学报：自然科学版，2013，52(5)：569–582.(YOU Mingqing. Strength and strength criteria for intact rocks[J]. Journal of Fudan University：Natural Science，2013，52(5)：569–582.(in Chinese))
[23] 杨仁树，陈 骏，方士正，等. 基于单轴剪切破坏的岩石M-C准则参数反演分析[J]. 岩土工程学报，2017，39(7)：1 351–1 356. (YANG Renshu，CHEN Jun，FANG Shizheng，et al. Inversion analysis of M–C criterion parameters of rock based on uniaxial shearing failure[J]. Chinese Journal of Geotechnical Engineering，2017，39(7)：1 351–1 356.(in Chinese))
[24] 许 江，陆丽丰，杨红伟，等. 剪切荷载作用下砂岩细观开裂扩展演化特征研究[J]. 岩石力学与工程学报，2011，30(5)：944–950. (XU Jiang，LU Lifeng，YANG Hongwei，et al. Study of evolution law of micro fracturing progress of sandstone under shear loading[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(5)：944–950.(in Chinese))
[25] 谢和平，高 峰，周宏伟，等. 岩石断裂和破碎的分形研究[J]. 防灾减灾工程学报，2003，23(4)：1–9.(XIE Heping，GAO Feng，ZHOU Hongwei，et al. Fractal fracture and fragmentation in rocks[J]. Journal of Seismology，2003，23(4)：1–9.(in Chinese))
[26] YANG Z Y，LO S C，DI C C. Reassessing the joint roughness coefficient(JRC) estimation using Z2[J]. Rock Mechanics and Rock Engineering，2001，34(3)：243–251.
[27] GRASSELLI G. Manuel rocha medal recipient shear strength of rock joints based on quantified surface description[J]. Rock Mechanics and Rock Engineering，2006，39(4)：295–314.
[28] BARTON N. Shear strength criteria for rock，rock joints，rock fill and rock masses：Problems and some solutions[J]. Journal of Rock Mechanics and Geotechnical Engineering，2013，5(4)：249–261.
[29] HONG E，LEE J，LEE I. Underestimation of roughness in rough rock joints[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2010，32(11)：1 385–1 403.
[30] GE Y，KULATILAKE P H S W，TANG H，et al. Investigation of natural rock joint roughness[J]. Computers and Geotechnics，2014，55(55)：290–305.
[31] FENG Q，FARDIN N，JING L，et al. A new method for in-situ non-contact roughness measurement of large rock fracture surfaces[J]. Rock Mechanics and Rock Engineering，2003，36(1)：3–25.
[32] SHIGUI D U，YUNJIN H U，XIAOFEI H U. Measurement of joint roughness coefficient by using profile graph and roughness ruler[J]. Journal of Earth Science，2009，20(5)：890–896.
[33] EL-SOUDANI S M. Profilometric analysis of fractures[J]. Metallography，1978，11(3)：247–336.
[34] 张绍群. 动载作用下木片断裂形貌特征与分形力学模型的研究[博士学位论文][D]. 哈尔滨：东北林业大学，2016.(ZHANG Shaoqun. A study on the morphological features of wood fracture and its model of fractal mechanics under the effect of dynamic load[Ph. D. Thesis][D]. Harbin：Northeast Forestry University，2016.(in Chinese))
|
|
|
|
2018, Vol. 37 
