冻融循环对麦积山石窟砂砾岩微观结构损伤机制研究

doi:10.13722/j.cnki.jrme.2020.0767

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摘要冻融循环作用是影响麦积山石窟风化的主要原因之一。通过室内试验分析和研究开放条件下麦积山石窟饱水砂砾岩在3种温度区间(－5 ℃～20 ℃，－10 ℃～20 ℃，－15 ℃～20 ℃)冻融循环作用下的波速损失率、质量损失率和抗拉强度的变化规律；采用CT和数字图像处理技术，分析岩样微观结构特征的变化；引入均化应力概念，将结晶压力与岩石宏观力学性质对比，作为岩石是否发生破坏的判据。结果表明：(1) 岩石质量、波速、抗拉强度均与冻融循环次数呈反比，但与冻融循环最低温度呈正比。(2) 提出温度区间是岩石冻融劣化的关键性环境控制因素，岩石原始胶结结构的破坏以及形成的孔隙是影响岩石冻融劣化的关键性内在因素。(3) 结晶均化应力与岩石屈服强度的对比，能够较好的用于判断冻融作用对岩石损伤的影响，研究结果有望为石质文物冻融风化机制以及相关保护技术的研发提供理论依据。

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	杨鸿锐1
	刘平1
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	孙博1
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	仪志毅1
	王家杰1
	岳永强4

关键词 ：岩石力学, 麦积山石窟, 冻融损伤, CT图像, 孔隙结构, 均化应力

Abstract：The freeze-thaw cycle is one of the main reasons affecting the weathering of Maijishan grottoes. The changes of the wave velocity、the mass and the tensile strength of the saturated sandy conglomerate under open conditions due to freeze-thaw cycles are studied through laboratory experiments in 3 temperature ranges of －5 ℃–20 ℃，－10 ℃–20 ℃ and －15 ℃–20 ℃，and CT and digital image processing techniques are used to analyze the changes of the microstructure characteristics of the rock samples. The concept of homogenized stress is introduced and compared with the macromechanical properties of the rock as a criterion for whether the rock is damaged. The results show that the mass，the wave velocity and the tensile strength are inversely proportional to the number of freeze-thaw cycles but directly proportional to the minimum temperature of the freeze-thaw cycle. It is proposed that the temperature range is the key environmental control factor for the freeze-thaw degradation of rock，and the destruction of the original cement structure of the rock and the pores are the key internal factor. The comparison between the crystallization homogenization stress and the rock yield strength can be better used to judge the influence of freezing and thawing on rock damage. The research results are expected to provide a theory for the research and development of freeze-thaw weathering mechanisms of stone cultural relics and related protection technologies.

Key words： rock mechanics Maijishan grottoes freeze-thaw damage CT image pore structure average stress

引用本文:

杨鸿锐1，刘平1，2，孙博1，3，仪志毅1，王家杰1，岳永强4. 冻融循环对麦积山石窟砂砾岩微观结构损伤机制研究[J]. 岩石力学与工程学报, 2021, 40(3): 545-555.
YANG Hongrui1，LIU Ping1，2，SUN Bo1，3，YI Zhiyi1，WANG Jiajie1，YUE Yongqiang4. Study on damage mechanisms of the microstructure of sandy conglomerate at Maijishan grottoes under freeze-thaw cycles. , 2021, 40(3): 545-555.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.0767 或 http://rockmech.whrsm.ac.cn/CN/Y2021/V40/I3/545

[9]	COUSSY O. Poromechanics of freezing materials[J]. Journal of the Mechanics and Physics of Solids，2005，53(8)：1 689-1 718.
[2]	王逢睿，焦大丁，刘平，等. 硫酸盐对麦积山砂砾岩风化影响的试验研究[J]. 岩土力学，2020，41(7)：2 199-2 206.(WANG Fengrui，JIAO Dading，LIU Ping，et al. Study on the damage mechanism of sulfate crystallizing on maijishan grottoes[J]. Rock and Soil Mechanics，2020，41(7)：2 199-2 206.(in Chinese))
[4]	方云，乔梁，陈星，等. 云冈石窟砂岩循环冻融试验研究[J]. 岩土力学，2014，35(9)：2 433-2 442.(FANG Yun，QIAO Liang，CHEN Xing，et al. Experimental study on cyclic freeze-thaw of sandstone in Yungang Grottoes[J]. Rock and Soil Mechanics，2014，35(9)：2 433-2 442.(in Chinese))
[6]	丁梧秀，徐桃，王鸿毅，等. 水化学溶液及冻融耦合作用下灰岩力学特性试验研究[J]. 岩石力学与工程学报，2015，34(5)：979-985.(DING Wuxiu，XU Tao，WANG Hongyi，et al. Experimental study on mechanical properties of limestone under the coupling action of hydrochemical solution and freeze-thaw[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(5)：979-985.(in Chinese))
[8]	AL-OMARI A，BECK K，BRUNETAUD X，et al Critical degree of saturation：A control factor of freeze-thaw damage of porous limestones at Castle of Chambord，France[J]. Engineering Geology，2015，185：71-80.
[10]	刘海康，张思渊，张鑫鑫. 不同初始含水率下砂岩冻融劣化特性试验研究[J]. 科学技术与工程，2017，17(26)：322-327.(LIU Haikang，ZHANG Siyuan，ZHANG Xinxin. Study on frost-thaw degradation of sandstone with different initial water content[J]. Science Technology and Engineering，2017，17(26)：322-327.(in Chinese))
[12]	闻磊，李夕兵，唐海燕. 变温度区间冻融作用下岩石物理力学性质研究及工程应用[J]. 工程力学，2017，34(5)：247-256.(WEN Lei，LI Xibin，TANG Haiyan. Study of physico-mechanical characteristics of rock under different frozen-thawed circle temperature range and its engineering application[J]. Engineering Mechanics，2017，34(5)：247-256.(in Chinese))
[1]	李最雄. 丝绸之路古遗址保护[M]. 北京：科学出版社，2003：1-428.(LI Zuixiong. Protection of the ancient ruins of the Silk Road[M]. Beijing：Science Press，2003：1-428.(in Chinese))
[3]	乔榛，王逢睿，王捷，等. 循环作用对马蹄寺石窟群岩石性能的影响[J]. 科学技术与工程，2019，19(28)：64-70.(QIAO Zhen，WANG Fengrui，WANG Jie，et al. The influence of cyclic action on the rock mass properties of Matusi Grottoes[J]. Science Technology and Engineering，2019，19(28)：64-70.(in Chinese))
[5]	王来贵，丁盛鹏，何慧娟，等. 冻融循环作用下含结核砂岩风化特征实验研究[J]. 工程地质学报，2018，26(3)：611-619.(WANG Laigui，DING Shengpeng，HE Huijuan，et al. Experimental study on weathering characteristics of sandstone with nodule under freeze-thaw cycles[J]. Journal of Engineering Geology，2018，26(3)：611-619. (in Chinese))
[7]	HORI M，MORIHIRO H. Micromechanical analysis on deterioration due to freezing and thawing in porous brittle materials[J]. International Journal of Engineering Science，1998，36 (4)：511-522.
[11]	訾凡，杨更社，贾海梁. 饱和度对泥质粉砂岩冻结力学性质的影响[J]. 冰川冻土，2018，40(4)：748-755.(ZI Fan，YANG Gengshe，JIA Hailiang. The influence of saturation on the freezing mechanical properties of argillaceous siltstone[J]. Journal of Glaciology and Geocryology，2018，40(4)：748-755.(in Chinese))
[13]	宋睿，刘建军，李光. 基于CT图像及孔隙网格的岩芯孔渗参数研究[J]. 西南石油大学学报：自然科学版，2015，37(3)：138-145.(SONG Rui，LIU Jianjun，LI Guang. Researches on the pore permeability of core sample based on 3D micro-CT image and pore-scale structured element modles[J]. Journal of Southwest Petroleum University：Science and Technology，2015，37(3)：138-145.(in Chinese))
[15]	吴刚，何国梁，张磊，等. 大理岩循环冻融试验研究[J]. 岩石力学与工程学报，2006，25(增1)：2 930-2 938.(WU Gang，HE Guoliang，ZHANG Lei，et al. Experimental study on cyclic freeze-thaw of marble[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.1)：2 930-2 938.(in Chinese))
[17]	贾海梁，项伟，谭龙，等. 砂岩冻融损伤机制的理论分析和试验验证[J]. 岩石力学与工程学报，2016，35(5)：879-895.(JIA Hailiang，XIANG Wei，TAN Long，et al. Theoretical analysis and experimental verifications of frost damage mechanism of sandstone[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(5)：879-895.(in Chinese))
[23]	琚晓冬，冯文娟，张玉军. 脆性孔隙介质内的结晶应力[J]. 岩土工程学报，2016，38(7)：1 246-1 253.(JU Xiaodong，FENG Wenjuan，ZHANG Yujun. Crystal stress in brittle porous media[J]. Chinese Journal of Geotechnical Engineering，2016，38(7)：1 246-1 253.(in Chinese))
[14]	杨更社，张全胜，蒲毅彬. 冻结温度对岩石细观损伤扩展特性影响研究初探[J]. 岩土力学，2004，25(9)：1 409-1 412.(YANG Gengshe，ZHANG Quansheng，PU Yibin. Preliminary study on meso-damage propagation characteristics of rock under condition of freezing temperature[J]. Rock and Soil Mechanics，2004，25(9)：1 409-1 412. (in Chinese))
[16]	刘泉声，黄诗冰，康永水，等. 裂隙岩石冻融损伤研究进展与思考[J]. 岩石力学与工程学报，2015，34(3)：452-471.(LIU Quansheng，HUANG Shibing，KANG Yongshui，et al. Advance and review on freezing-thawing damage of fractured rock[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(3)：452-471.(in Chinese))
[18]	谌恬. 基于显微CT图像的岩芯孔隙结构表征和验证[硕士学位论文][D]. 成都：电子科技大学，2014.(CHEN Tian. Research and design of fractional order PID control based on permanent magnet synchronous machine[M. S. Thesis][D]. Chengdu：University of Electronic Science and Technology of China，2014.(in Chinese))
[19]	田威，韩女，张鹏坤. 基于CT技术的混凝土孔隙结构冻融损伤试验[J]. 中南大学学报：自然科学版，2017，48(11)：3 069-3 075. (TIAN Wei，HAN Nv，ZHANG Pengkun. Experiments on the freeze- thaw damage of concrete porous structure based on CT technique[J]. Journal of Central South University：Science and Technology，2017，48(11)：3 069-3 075.(in Chinese))
[20]	琚晓冬. 岩石类脆性孔隙材料结晶破坏机制研究[博士学位论文][D]. 北京：中国科学院大学，2014.(JU Xiaodong. Study on the mechanism of crystallization damage for the porous media of rocks[Ph. D Thesis][D]. Beijing：University of Chinese Academy of Sciences，2014.(in Chinese))
[21]	COUSSY O. Poromechanics of freezing materials[J]. Journal of the Mechanics and Physics of Solids，2005，53(8)：1 689-1 718.
[22]	GEORGE W S. Crystallization in pores[J]. Cement and Concrete Research，1999，29(8)：1 347-1 358.