干湿循环下溶隙灰岩单轴压缩损伤破裂特征

王桂林; 任甲山; 曹天赐; 杨证钦; 王润秋; 罗广东

doi:10.11988/ckyyb.20220970

PDF(7459 KB)

raybet体育在线院报 ›› 2024, Vol. 41 ›› Issue (2) : 105-114. DOI: 10.11988/ckyyb.20220970

岩土工程

干湿循环下溶隙灰岩单轴压缩损伤破裂特征

王桂林^1,2,3, 任甲山¹, 曹天赐¹, 杨证钦¹, 王润秋¹, 罗广东¹

作者信息 +

Effect of Dry-Wet Cycles on Damage and Failure Characteristics of Karst-fissured Limestone under Uniaxial Compression

WANG Gui-lin^1,2,3, REN Jia-shan¹, CAO Tian-ci¹, YANG Zheng-qin¹, WANG Run-qiu¹, LUO Guang-dong¹

Author information +

文章历史 +

摘要

为研究干湿循环对溶隙灰岩损伤破坏特征的影响,制备裂隙状、椭圆状、蘑菇状和类哑铃状溶隙灰岩试样,开展单轴压缩试验并辅以数字图像相关方法(DIC)和声发射技术进行监测,分析0、3、6、10次干湿循环下溶隙灰岩的损伤特性和变形破裂特征。结果表明:①基于峰值强度定义干湿循环和溶隙形状损伤度,干湿循环损伤度与循环次数和水-岩接触面积成正比,溶隙形状损伤度在干湿循环过程中为33.31%~64.86%;耦合损伤度合理表达了二者的耦合关系。②干湿循环作用下溶隙灰岩由拉伸破坏转变为以拉伸破坏为主的拉剪混合破坏,表面应变局部化带过渡到“延性”扩展;而溶隙形状对试样破坏有优势导向作用。③干湿循环导致岩样声发射累积振铃计数减小,裂纹起裂应力σ_ci及裂纹损伤应力σ_cd也逐步降低。研究成果可以为三峡库区溶隙灰岩的破坏机理分析提供科学依据。

Abstract

To investigate the impact of dry-wet cycles on damage and failure characteristics of karst-fissured limestone, we prepared limestone specimens with fracture-shaped, elliptical, mushroom-shaped, and dumbbell-shaped karst fissures for uniaxial compression test. Digital Image Correlation and Acoustic Emission techniques were also employed to monitor the damage and deformation characteristics of karst-fissured limestone after 0, 3, 6 and 10 dry-wet cycles. The results showed that the dry-wet cycles and the karst fissure damage degree of limestone samples were defined based on the peak strength. The damage degree was proportional to the number of cycles and the water-rock contact area, ranging from 33.31% to 64.86% during dry-wet cycles. We expressed the coupling relationship between the damage degree of karst fissure and the dry-wet cycle. Under dry-wet cycles, the failure mode of karst-fissured limestone changed from tensile failure to tensile-shear mixed failure, and the local zone of surface strain transitioned to ductile extension. The shape of karst fissure had a dominant guiding effect on the failure path. In addition, the cumulative ringing counts of acoustic emission, as well as the crack initiation stress σ_ci and crack damage stress σ_cd decreased with the proceedings of dry-wet cycles. The research results provide scientific basis for analyzing the failure mechanism of karst-fissured limestone in the Three Gorges Reservoir area.

导出引用

王桂林, 任甲山, 曹天赐, 杨证钦, 王润秋, 罗广东. 干湿循环下溶隙灰岩单轴压缩损伤破裂特征[J]. raybet体育在线院报. 2024, 41(2): 105-114 https://doi.org/10.11988/ckyyb.20220970

WANG Gui-lin, REN Jia-shan, CAO Tian-ci, YANG Zheng-qin, WANG Run-qiu, LUO Guang-dong. Effect of Dry-Wet Cycles on Damage and Failure Characteristics of Karst-fissured Limestone under Uniaxial Compression[J]. Journal of Changjiang River Scientific Research Institute. 2024, 41(2): 105-114 https://doi.org/10.11988/ckyyb.20220970

中图分类号： TU45

参考文献

[1] HALE P A. A Laboratory Investigation of the Effects of Cyclic Heating and Cooling, Wetting and Drying, and Freezing and Thawing on the Compressive Strength of Selected Sandstones[J]. Environmental and Engineering Geoscience, 2003, 9(2): 117-130.
[2] 韩铁林,师俊平,陈蕴生.冻融循环和干湿循环作用下砂岩断裂韧度及其与强度特征相关性的试验研究[J].固体力学学报,2016,37(4):348-359.(HAN Tie-lin,SHI Jun-ping,CHEN Yun-sheng.Experimental Study on Fracture Toughness and Its Correlation with Strength Characteristics of Sandstone under Freeze-thaw Cycles and Dry-wet Cycles[J]. Chinese Journal of Solid Mechanics,2016,37(4):348-359.(in Chinese))
[3] 刘新荣, 傅晏, 王永新, 等. (库)水-岩作用下砂岩抗剪强度劣化规律的试验研究[J]. 岩土工程学报, 2008, 30(9): 1298-1302. (LIU Xin-rong, FU Yan, WANG Yong-xin, et al. Deterioration Rules of Shear Strength of Sand Rock under Water-rock Interaction of Reservoir[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(9): 1298-1302.(in Chinese))
[4] 邓华锋,齐豫,李建林,等.水-岩作用下断续节理砂岩力学特性劣化机理[J].岩土工程学报,2021,43(4):634-643. (DENG Hua-feng,QI Yu,LI Jian-lin,et al.Degradation Mechanism of Intermittent Jointed Sandstone under Water-rock Interaction[J]. Chinese Journal of Geotechnical Engineering,2021,43(4):634-643.(in Chinese))
[5] 宋勇军, 陈佳星, 张磊涛, 等. 干湿循环作用下受荷砂岩损伤劣化特性研究[J]. raybet体育在线院报, 2021, 38(9): 133-140. (SONG Yong-jun, CHEN Jia-xing, ZHANG Lei-tao, et al. Damage and Degradation Characteristics of Loaded Sandstone under Drying-Wetting Cycles[J]. Journal of Yangtze River Scientific Research Institute, 2021, 38(9): 133-140.(in Chinese))
[6] 刘小红,朱杰兵,曾平,等.干湿循环对岸坡粉砂岩劣化作用试验研究[J].raybet体育在线院报,2015,32(10):74-77,84.(LIU Xiao-hong,ZHU Jie-bing,ZENG Ping,et al. Deteriorating Effect of Wetting and Drying Cycles on Bank Slope’s Siltstone Properties[J]. Journal of Yangtze River Scientific Research Institute,2015,32(10):74-77,84.(in Chinese))
[7] YAO W, LI C, ZHAN H, et al. Multiscale Study of Physical and Mechanical Properties of Sandstone in Three Gorges Reservoir Region Subjected to Cyclic Wetting–Drying of Yangtze River Water[J]. Rock Mechanics and Rock Engineering, 2020, 53(5): 2215-2231.
[8] 张亮. 干湿循环下节理砂岩力学特性损伤效应及本构模型研究[D]. 重庆: 重庆大学, 2020. (ZHANG Liang. Study on Mechanical Properties Damage Effect and Constitutive Model of Jointed Sandstone under Dry-Wet Cycles[D]. Chongqing: Chongqing University, 2020. (in Chinese))
[9] HU M, LIU Y, REN J, et al. Laboratory Test on Crack Development in Mudstone under the Action of Dry-wet Cycles[J]. Bulletin of Engineering Geology and the Environment, 2019, 78(1): 543-556.
[10]DANG C, SUI Z, YANG X, et al. Pore Changes in Purple Mudstone Based on the Analysis of Dry-wet Cycles Using Nuclear Magnetic Resonance[J]. Shock and Vibration, 2022, Doi: 10.1155/2022/5578401.
[11]殷跃平, 黄波林, 李滨, 等. 三峡库区消落带溶蚀岩体劣化指标研究[J]. 地质学报, 2021, 95(8): 2590-2600. (YIN Yue-ping, HUANG Bo-lin, LI Bin, et al. Research on the Deterioration Index of Karst Rock Mass in the Fluctuating Water Level Zone of Three Gorges Reservoir Area[J]. Acta Geologica Sinica, 2021, 95(8): 2590-2600.(in Chinese))
[12]殷坤龙, 周春梅, 柴波. 三峡库区巫峡段反倾岩石边坡的破坏机制及判据[J]. 岩石力学与工程学报, 2014, 33(8): 1635-1643. (YIN Kun-long, ZHOU Chun-mei, CHAI Bo. Failure Mechanism and Criterion of Counter-tilt Rock Slopes at Wuxia Gorge Section in Three Gorges Reservoir Area[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(8): 1635-1643.(in Chinese))
[13]陈洪凯,宋云梅.重庆市合川区磨子岩危岩形成过程有限元数值模拟[J].重庆师范大学学报(自然科学版),2016,33(1):36-39.(CHEN Hong-kai,SONG Yun-mei.Numerical Simulation for Formation Process of Moziyan Perilous Rock in Hechuan District of Chongqing[J]. Journal of Chongqing Normal University (Natural Science),2016,33(1):36-39.(in Chinese))
[14]YIN Y, HUANG B, LIU G, et al. Potential Risk Analysis on a Jianchuandong Dangerous Rockmass-generated Impulse Wave in the Three Gorges Reservoir, China[J]. Environmental Earth Sciences, 2015, 74(3): 2595-2607.
[15]王恒, 蒋先念, 李树建, 等. 三峡库区危岩体劣化特征及变形破坏模式研究[J]. 重庆交通大学学报(自然科学版), 2019, 38(12): 92-96. (WANG Heng, JIANG Xian-nian, LI Shu-jian, et al. Degradation Characteristics and Deformation Failure Mode of Perilous Rock Mass in the Three Gorges Reservoir Area[J]. Journal of Chongqing Jiaotong University (Natural Science), 2019, 38(12): 92-96.(in Chinese))
[16]王文沛, 李滨, 黄波林, 等. 三峡库区近水平厚层斜坡滑动稳定性研究: 以重庆巫山箭穿洞危岩为例[J]. 地质力学学报, 2016, 22(3): 725-732. (WANG Wen-pei, LI Bin, HUANG Bo-lin, et al. Stability Analysis of Sub-horizontal Thick-bedded Slope in Three Gorges Reservior Area: A Case Study of Jianchuandong Dangerous Rockmass in Wushan, Chongqing[J]. Journal of Geomechanics, 2016, 22(3): 725-732.(in Chinese))
[17]吴碧辉,李华秀,姚明伙.巫山县龚家方至独龙一带斜坡变形破坏机制[J]. 地下空间与工程学报,2010,6(增刊2):1656-1659.(WU Bi-hui,LI Hua-xiu,YAO Ming-huo.Deformation and Failure Mechanism of Slope in Area from Gongjiafang to Dulong of Wuxia County, Chongqing[J]. Chinese Journal of Underground Space and Engineering,2010,6(Supp.2):1656-1659.(in Chinese))
[18]WANG L, HUANG B, ZHANG Z, et al. The Analysis of Slippage Failure of the HuangNanBei Slope under Dry-wet Cycles in the Three Gorges Reservoir Region, China[J]. Geomatics, Natural Hazards and Risk, 2020, 11(1): 1233-1249.
[19]殷跃平, 王鲁琦, 赵鹏, 等. 三峡库区高陡岸坡溃屈失稳机理及防治研究[J]. 水利学报, 2022, 53(4): 379-391. (YIN Yue-ping, WANG Lu-qi, ZHAO Peng, et al. Crashed Failure Mechanism & Prevention of Fractured High-steep Slope in the Three Gorges Reservoir, China[J]. Journal of Hydraulic Engineering, 2022, 53(4): 379-391.(in Chinese))
[20]GU D, LIU H, GAO X, et al. Influence of Cyclic Wetting–Drying on the Shear Strength of Limestone with a Soft Interlayer[J]. Rock Mechanics and Rock Engineering, 2021, 54(8): 4369-4378.
[21]段玲玲,邓华锋,齐豫,等.水-岩作用下单裂隙灰岩渗流特性演化规律研究[J].岩土力学,2020,41(11):3671-3679,3768.(DUAN Ling-ling,DENG Hua-feng,QI Yu,et al. Study on the Evolution of Seepage Characteristics of Single-fractured Limestone under Water-rock Interaction[J]. Rock and Soil Mechanics, 2020,41(11):3671-3679,3768.(in Chinese))
[22]闫国强,黄波林,代贞伟,等.三峡库区巫峡段典型岩体劣化特征研究[J].水文地质工程地质,2020,47(4):62-72.(YAN Guo-qiang,HUANG Bo-lin,DAI Zhen-wei,et al. A Study of the Deterioration Effect of Limestone Bank Slope Rock Mass at the Wuxia Section of the Three Gorges Reservoir Area[J]. Hydrogeology & Engineering Geology,2020,47(4):62-72.(in Chinese))
[23]王桂林, 王润秋, 孙帆, 等. 单轴压缩下溶隙灰岩声发射RA-AF特征及破裂模式研究[J]. 中国公路学报, 2022, 35(8): 118-128. (WANG Gui-lin, WANG Run-qiu, SUN Fan, et al. RA-AF Characteristics of Acoustic Emission and Failure Mode of Karst-fissure Limestone under Uniaxial Compression[J]. China Journal of Highway and Transport, 2022, 35(8): 118-128.(in Chinese))
[24]赵怡晴, 刘红岩, 吕淑然, 等. 基于宏观和细观缺陷耦合的节理岩体损伤本构模型[J]. 中南大学学报(自然科学版), 2015, 46(4): 1489-1496. (ZHAO Yi-qing, LIU Hong-yan, LÜ Shu-ran, et al. Damage Constitutive Model of Jointed Rock Mass Based on Coupling Macroscopic and Mesoscopic Flaws[J]. Journal of Central South University (Science and Technology), 2015, 46(4): 1489-1496.(in Chinese))
[25]闫章程, 孙辉, 李利平, 等. 灰岩单轴压缩过程中干燥与饱水状态对声发射特征的影响[J]. raybet体育在线院报, 2020, 37(4): 109-114, 121. (YAN Zhang-cheng, SUN Hui, LI Li-ping, et al. Acoustic Emission Characteristics in Dry and Water-saturated Limestones under Uniaxial Compression[J]. Journal of Yangtze River Scientific Research Institute, 2020, 37(4): 109-114, 121.(in Chinese))
[26]熊绍真, 史文兵, 王小明. 单轴压缩条件下岩溶化裂隙岩体损伤破坏特征研究[J]. 工程地质学报, 2022, 30(4): 1098-1110. (XIONG Shao-zhen, SHI Wen-bing, WANG Xiao-ming. Damage and Failure Characteristics of Karst Fractured Rock Mass under Uniaxial Compression[J]. Journal of Engineering Geology, 2022, 30(4): 1098-1110.(in Chinese))
[27]PENG Y, CHENG X, SONG N, et al. Study on Crack Propagation and Coalescence in Fractured Limestone Based on 3D-DIC Technology[J]. Energies, 2022, 15(6): 2007.
[28]张皓.准脆性材料损伤演化的实验力学研究[D].天津:天津大学,2014.(ZHANG Hao.Experimental Study on Damage Evolution of Quasi-brittle Materials[D].Tianjin: Tianjin University,2014.(in Chinese))
[29]杨振,亓宪寅,冯梦瑶,等.基于声发射和DIC特征的层状复合岩石力学损伤试验及模型研究[J]. raybet体育在线院报,2023,40(4):119-126.(YANG Zhen,QI Xian-yin,FENG Meng-yao,et al. Research on Mechanical Damage Test and Model of Layered Composite Rock Based on Acoustic Emission and DIC Characteristics[J]. Journal of Yangtze River Scientific Research Institute,2023,40(4):119-126.(in Chinese))
[30]王创业, 常新科, 刘沂琳. 花岗岩破裂全过程声发射时频域信号特征及前兆识别信息[J]. raybet体育在线院报, 2020, 37(3): 82-89. (WANG Chuang-ye, CHANG Xin-ke, LIU Yi-lin. Time and Frequency Domain Characteristics and Damage Precursor Identification Information of Acoustic Emission Signals during Granite Loading[J]. Journal of Yangtze River Scientific Research Institute, 2020, 37(3): 82-89.(in Chinese))
[31]赵云阁,黄麟淇,李夕兵.岩石损伤强度及峰值强度前后阶段的声发射识别[J].岩土工程学报,2022,44(10):1908-1916.(ZHAO Yun-ge,HUANG Lin-qi,LI Xi-bing.Identification of Stages before and after Damage Strength and Peak Strength Using Acoustic Emission Tests[J]. Chinese Journal of Geotechnical Engineering,2022,44(10):1908-1916.(in Chinese))