双裂隙类砂岩冻胀断裂特征与强度损失研究

doi:10.13722/j.cnki.jrme.2019.0679

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (827 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要寒区裂隙岩体受冻融作用的影响经常发生断裂破坏。为了研究岩桥倾角对裂隙岩体冻胀扩展过程、断裂破坏特征以及强度损失的影响机制，利用相似材料制备含不同岩桥倾角的双裂隙类砂岩试样，并开展一系列裂隙注水、不注水的冻融循环和单轴压缩试验，得到冻胀裂纹扩展特性及对类砂岩力学特性的影响规律。研究结果表明：(1) 受裂隙冻胀力的驱使，冻胀裂纹不断扩展延伸，并伴随着“枝状”微裂纹的生长；(2) 冻胀裂纹的外尖端主要沿着初始裂隙方向扩展，而内尖端受应力干扰作用会朝着另一条预制裂隙外尖端发生偏转，且岩桥倾角越大，这种偏转效应越明显；(3) 试样单轴压缩破坏模式容易受到冻胀裂纹的影响，当岩桥倾角= 90°～135°时，主要沿着冻胀裂纹方向发生剪切破坏，导致试样强度明显降低；而当= 180°时，冻胀裂纹不再是试样单轴压缩破坏的主要诱因，对其强度损失和断裂特征几乎没有影响。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	李平1
	唐旭海1
	2
	刘泉声1
	2
	罗攀登3

关键词 ：岩石力学, 裂隙岩体, 岩桥倾角, 冻胀扩展, 断裂特征, 强度损失

Abstract：The fractured rock mass in cold regions is often affected by the freezing and thawing action. In order to study the influence mechanism of the dip angle of rock bridge on frost heave expansion process，fracture failure characteristics and strength loss of fractured rock mass，double-fracture sandstone samples with different dip angles of rock bridge were prepared with similar materials，and freezing and thawing cycles with and without water injection and a series of uniaxial compression tests were performed. The results indicate that，driven by the frost heaving force，the frost heaving cracks continue to expand along with the growth of dendritic microcracks，and that the outer tip of the frost heaving crack mainly propagates along the initial crack direction while the inner tip tends to deflect towards the outer tip of another prefabricated crack. The greater the dip angle of the rock bridge，the more obvious the deflection effect will be. The uniaxial compression failure mode of the sample is easily affected by the frost heaving crack. When the inclination angle of the rock bridge，，is between 90° and 135°，shear failure occurs in the direction of the frost heaving crack，which leads to a significant decrease in the strength of the specimen. When =180°，the frost heaving crack is no longer the main cause of uniaxial compression failure of the specimen and has little effect on the strength loss and fracture characteristics.

Key words： rock mechanics fractured rock mass rock bridge dip frost cracking fracture characteristics strength loss

引用本文:

李平1，唐旭海1，2，刘泉声1，2，罗攀登3. 双裂隙类砂岩冻胀断裂特征与强度损失研究[J]. 岩石力学与工程学报, 2020, 39(1): 115-125.
LI Ping1，TANG Xuhai1，2，LIU Quansheng1，2，LUO Pandeng3. Experimental study on fracture characteristics and strength loss of intermittent fractured quasi-sandstone under freezing and thawing#br#. , 2020, 39(1): 115-125.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2019.0679 或 http://www.rockmech.org/CN/Y2020/V39/I1/115

[19]	MATSUOKA N. A laboratory simulation on freezing expansion of a fractured rock：preliminary data[R]. [S. l.]：The University of Tsukuba，1995.
[1]	JUNG Y B，PARK E S，CHUNG S K，et al. Coupled hydro-thermal modeling of ice ring formation around a pilot LNG cavern in rock[J]. Engineering Geology，2011，118(3)：122-133.
[11]	张慧梅，谢祥妙，彭川，等. 三向应力状态下冻融岩石损伤本构模型[J]. 岩土工程学报，2017，39(8)：1 444-1 452.(ZHANG Huimei，XIE Xiangmiao，Peng Chuan，et al. Constitutive model for damage of freeze-thaw rock under three-dimensional stress[J]. Chinese Journal of Geotechnical Engineering，2017，39(8)：1 444-1 452.(in Chinese))
[15]	刘红岩，刘冶，邢闯锋，等. 循环冻融条件下节理岩体损伤破坏试验研究[J]. 岩土力学，2014，35(6)：1 547-1 554.(LIU Hongyan，LIU Ye，XING Chuangfeng，et al. Test study of damage failure of jointed rock mass under freezing-thawing cycles[J]. Rock and Soil Mechanics，2014，35(6)：1 547-1 554.(in Chinese))
[17]	申艳军，杨更社，荣腾龙，等. 冻融循环作用下单裂隙类砂岩局部化损伤效应及端部断裂特性分析[J]. 岩石力学与工程学报，2017，36(3)：562-570.(SHEN Yanjun，YANG Gengshe，RONG Tenlong，et al. Localized damage effects of quasi-sandstone with single fracture and fracture behaviors of joint end under cyclic freezing and thawing[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(3)：562-570.(in Chinese))
[20]	NAKAMURA D，GOTO T，SUZUKIT I. Basic Study on the frost heave pressure of rocks-dependence of the location of frost heave on the strength of the rock[C]// Cold Regions Engineering 2012：Sustainable Infrastructure Development in a Changing Cold Environment，ASCE. [S. l.]：[s. n.]，2012：124-133.
[21]	路亚妮，李新平，吴兴宏. 三轴压缩条件下冻融单裂隙岩样裂缝贯通机制[J]. 岩土力学，2014，35(6)：1 579-1 584.(LU Yani，LI Xinping，WU Xinghong. Fracture coalescence mechanism of single flaw rock specimen due to freeze-thaw under triaxial compression[J]. Rock and Soil Mechanics，2014，35(6)：1 579-1 584.(in Chinese))
[23]	黄彦华，杨圣奇. 非共面双裂隙红砂岩宏细观力学行为颗粒流模拟[J]. 岩石力学与工程学报，2014，33(8)：1 644-1 653.(HUANG Yanhua，YANG Shengqi. Particle flow simulation of macro-and meso-mechanical behavior of and sandstone containing two pre-existing non-coplanar fissures[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(8)：1 644-1 653.(in Chinese))
[25]	庄贤鹏，王述红，王凯毅，等. 断续双裂隙砂岩的强度与起裂、贯通模式[J]. 科学技术与工程，2019，19(20)：122-127.(ZHUANG Xianpeng，WANG Shuhong，WANG Kaiyi，et al. Intermittent double sandstone fracture strength and fracture initiation through-mode[J]. Chinese Journal of Science Technology and Engineering，2019，19(20)：122-127.(in Chinese))
[2]	徐拴海，李宁，王晓东，等. 露天煤矿冻岩边坡饱和砂岩冻融损伤试验与劣化模型研究[J]. 岩石力学与工程学报，2016，35(12)：2 561-2 571.(XU Shuanhai，LI Ning，WANG Xiaodong，et al. Damage test and degradation model of saturated sandstone due to cyclic freezing and thawing of rock slopes of open-pit coal mine[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(12)：2 561-2 571.(in Chinese))
[3]	黄诗冰，刘泉声，刘艳章，等. 低温热力耦合下岩体椭圆孔(裂)隙中冻胀力与冻胀开裂特征研究[J]. 岩土工程学报，2018，40(3)：459-467.(HUANG Shibing，LIU Quansheng，LIU Yanzhang，et al. Frost heaving pressure and characteristics of frost cracking in elliptical cavity(crack) of rock mass under coupled thermal-mechanical condition at low temperature[J]. Chinese Journal of Geotechnical Engineering，2018，40(3)：459-467.(in Chinese))
[5]	刘泉声，黄诗冰，康永水，等. 低温冻结岩体单裂隙冻胀力与数值计算研究[J]. 岩土工程学报，2015，37(9)：1 572-1 580.(LIU Quansheng，HUANG Shibing，KANG Yongshui，et al. Numerical and theoretical studies on frost heaving pressure in a single fracture of frozen rock mass under low temperature[J]. Chinese Journal of Geotechnical Engineering，2015，37(9)：1 572-1 580.(in Chinese))
[7]	黄诗冰，刘泉声，程爱平，等. 低温岩体裂隙冻胀力与冻胀扩展试验初探[J]. 岩土力学，2018，39(1)：78-84.(HUANG Shibing，LIU Quansheng，CHENG Aiping，et al. Preliminary experimental study of frost heaving pressure in crack and frost heaving propagation in rock mass under low temperature[J]. Rock and Soil Mechanics，2018，39(1)：78-84.(in Chinese))
[9]	刘泉声，黄诗冰，康永水，等. 低温冻结岩体单裂隙冻胀力与数值计算研究[J]. 岩土工程学报，2015，37(9)：1 572-1 580.(LIU Quansheng，HUANG Shibing，KANG Yongshui，et al. Numerical and theoretical studies on frost heaving pressure in a single fracture of frozen rock mass under low temperature[J]. Chinese Journal of Geotechnical Engineering，2015，37(9)：1 572-1 580.(in Chinese))
[10]	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 Huimei，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))
[12]	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))
[13]	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))
[8]	刘艳章，郭赟林，黄诗冰，等. 冻融作用下裂隙类砂岩断裂特征与强度损失研究[J]. 岩土力学，2018，39(增2)：62-71.(LIU Yanzhang，GUO Yunlin，HUANG Shibing，et al. Study of fracture characteristics and strength loss of crack quasi-sandstone under freeze-thaw cycles[J]. Rock and Soil Mechanics，2018，39(Supp.2)：62-71.(in Chinese))
[18]	申艳军，杨更社，王婷，等. 岩石内孔隙/裂隙冻胀力模型及其适用性评价[J]. 冰川冻土，2019，41(1)：117-128.(SHEN Yanjun，YANG Gengshe，WANG Ting，et al. The model of pore/fracture frost heave force in rock and its applicability evaluation[J]. Journal of Glaciology and Geocryology，2019，41(1)：117-128.(in Chinese)))
[4]	FENER M，INCE I. Effects of the freeze-thaw(F-T) cycle on the andesitic rocks(Sille-Konya/Turkey) used in construction building[J]. Journal of African Earth Sciences，2015，109：96-106.
[6]	刘泉声，黄诗冰，康永水，等. 裂隙岩体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 frezing-thawing damage of fractured rock[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(3)：452-471.(in Chinese))
[14]	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，WANG Yangjun. Research on damage model of single jointed rock masses ubder coupling action of freeze-thaw and loading[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(11)：2 307-2 315.(in Chinese))
[16]	阎锡东，刘红岩，邢闯锋，等. 基于微裂隙变形与扩展的岩石冻融损伤本构模型研究[J]. 岩土力学，2015，36(12)：3 489-3 499.(YAN Xidong，LIU Hongyan，XING Chuangfeng，et al. Constitutive model research on freezing-thawing damage of rock based on deformation and propagation of microcracks[J]. Rock and Soil Mechanics，2015，36(12)：3 489-3 499.(in Chinese))
[24]	张恒，唐世斌，王龙，等. 压缩作用下岩石预置裂隙贯通机制的研究[J]. 应用力学学报，2015，32(5)：762-767.(ZHANG Heng，TANG Shibin，WANG Long，et al. Study on the mechanism of rock pre-fracture penetration under compression[J]. Chinese Journal of Applied Mechanics，2015，32(5)：762-767.(in Chinese))
[22]	申艳军，荣腾龙，杨更社，等. 类砂岩相似材料配合比方案试验研究[J]. 水利水电科技进展，2016，36(4)：75-79.(SHEN Yanjun，RONG Tenglong，YANG Gengshe，et al. Experimental study on ratio of quasi-sandstone similar material[J]. Advances in Science and Technology of Water Resources，2016，36(4)：75-79.(in Chinese))