水–岩作用下红层软岩力学特性劣化规律研究

doi:10.13722/j.cnki.jrme.2016.0810

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摘要红层软岩在三峡库区广泛分布，其在水–岩作用下的物理力学特性劣化将直接影响相关库岸边坡的长期变形稳定与安全。基于此，考虑消落带库水位反复升降变化，设计进行红层软岩的浸泡–风干循环水–岩作用试验，研究结果表明：(1) 在水–岩作用过程中，红层软岩的强度及变形参数劣化趋势明显，岩样存在逐渐“变软”的趋势，而且前3次浸泡–风干循环中的劣化速率较快，5次浸泡–风干循环作用之后，红层软岩的强度及变形参数劣化趋势逐渐趋于缓慢；(2) 在水–岩作用过程中，岩样的破坏模式也存在明显的变化，不同围压下岩样的剪切破坏特征逐渐明显，岩样破坏时控制性裂纹数量逐渐减少，次生裂纹的数量逐渐增加；(3) 在水–岩作用过程中，水压力的反复升降变化和浸泡–风干循环作用对红层软岩造成了不可逆的渐进累积损伤，红层软岩由相对致密的结构转变成微观裂隙、孔隙发育的松散多孔结构，宏观上就表现为抗压、抗剪强度劣化和破坏模式的变化。相关研究结论可为库岸边坡长期变形稳定分析提供参考。

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	邓华锋
	周美玲
	李建林
	方景成
	肖瑶
	张恒宾
	王晨玺杰

关键词 ：岩石力学；红层软岩；消落带；浸泡&ndash, 风干循环；劣化；破坏特征；微观结构

Abstract：Red-layer soft rock is widely distributed in the Three Gorges Reservoir area. The deterioration of physical and mechanical characteristics of red-layer soft rock，caused by water-rock interaction，will directly affect the long-term deformation stability and safety for the slopes of reservoirs concerned. Therefore，considering the fact that the water level of hydro-fluctuation belt is rising up and down repeatedly，the immersion-air dry test for red-layer soft rock is designed and conducted. The results show that：(1) Under water-rock interaction，it is obvious that the strength and deformation parameters of the red-layer soft rock are deteriorating，and the rock samples tend to be soft gradually. At the meanwhile，the first 3 tests have a faster deterioration rate for the parameters，but the rate tends to be slowdown after 5 immersion-air dry circulations；(2) As the number of circulation times increased，the failure modes of the rock samples would also be changed obviously，its shear failure features with different confining pressure would be behaved obviously，and the number of controlled cracks would be decreased gradually while the secondary cracks would be increased；(3) Under water-rock interaction，the repeated change of water pressure and the immersion-air dry circulation would impose irreversible cumulative damage to red-layer soft rock，which would convert to loose and porous structure with micro cracks and developing pores from relatively compact structure. In macroscopic view，it would behave as the deterioration of compressive strength and shear strength，and the change of failure modes. Related research results can provide references for the study of the long-term deformation stability and safety for the slopes of reservoirs.

Key words： rock mechanics red-layer soft rock hydro-fluctuation belt immersion-air dry circulation deterioration failure feature micro-structure

引用本文:

邓华锋，周美玲，李建林，方景成，肖瑶，张恒宾，王晨玺杰. 水–岩作用下红层软岩力学特性劣化规律研究[J]. 岩石力学与工程学报, 2016, 35(S2): 3481-3491.
DENG Huafeng，ZHOU Meiling，LI Jianlin，FANG Jingcheng，XIAO Yao，ZHANG Hengbin，WANG Chenxiejie. Mechanical properties deteriorating change rule research of red-layer soft rock under water-rock interaction. , 2016, 35(S2): 3481-3491.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2016.0810 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/IS2/3481

[1]	李守定，李晓，张年学，等. 三峡库区诛罗系易滑地层沉积特征及其对岩石物理力学性质的影响[J].工程地质学报，2004，12(4)：385-389.(LIShouding，LIXiao，ZHANGNianxue，etal.Sedimentation characteristics of the Jurassic sliding-prone stratum in the Three Gorges reservoir area and their influence on physical and mechanical properties of rock[J]. Journal of Engineering Geology，2004，12(4)：385-389.(in Chinese))
[2]	简文星，殷坤龙，马昌前，等. 万州侏罗纪红层软弱夹层特征[J].岩土力学，2005，26(6)：901-905.(JIANWenxing，YINKunlong，MAChangqian，et al.Characteristics of incompetent beds in Jurassic red elastic rocks in Wanzhou[J]. Rock and Soil Mechanics，2005，26(6)：901-905.(in Chinese))
[3]	王思敬，马凤山，杜永廉. 水库地区的水岩作用及其地质环境影响[J]. 工程地质学报，1996，4(3)：1-9.(WANGSijing，MAFengshan，DUYonglian.On the rock-water interaction in reservoir areas and its geoenvironmental effect[J]. Journal of Engineering Geology，1996，4(3)：1-9.(in Chinese))
[4]	何满潮，景海河，孙晓明. 软岩工程力学[M]. 北京：科学出版社，2002：5.(HEManchao，JINGHaihe，SUN Xiaoming. Soft rock engineering mechanics[M]. Beijing：Science Press，2002：5.(in Chinese))
[5]	刘新荣，傅晏，王永新，等.(库)水-岩相互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)：1 298-1 302.(LIU Xinrong，FU Yan，WANG Yongxin，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)：1 298-1 302.(in Chinese))
[6]	傅晏，刘新荣，张永兴，等.水岩相互作用对砂岩单轴强度的影响研究[J].水文地质工程地质，2009，36(6)：54-58.(FU Yan，LIU Xinrong，ZHANG Yongxing，et al. Study on the influence of water-rock interaction to the strength of sandstone[J]. Hydrogeology and Engineering Geology，2009，36(6)：54-58.(in Chinese))
[7]	姚华彦，张振华，朱朝辉.干湿交替对砂岩力学特性影响的试验研究[J]. 岩土力学，2010，31(12)：3 704-3 708.(YAO Huayan，ZHANG Zhenhua，ZHU Chanhui. Experimental study of mechanical properties of sandstone under cyclic drying and wetting[J]. Rock and Soil Mechanics，2010，31(12)：3 704-3 708.(in Chinese))
[8]	姜永东，阎宗岭，刘元雪.干湿循环作用下岩石力学性质的实验研究[J]. 中国矿业，2011，20(5)：104-110.(JIANG Yongdong，YAN Zongling，LIU Yuanxue，Experimental study on mechanical properties of rock under the conditions of wet and dry cycles[J]. China Mining Magazine，2011，20(5)：104-110.(in Chinese))
[9]	梅华，朱燕，牛传星.饱和-失水循环作用下蚀变岩劣化规律研究[J]. 工程地质学报，2015，23(6)：1 039-1 044.(MEI Hua，ZHU Yan，NIU Chuanxing. Laboratory study on deterioration law of altered rockunder effect of water saturation-dehydration circulation[J]. Journal of Engineering Geology，2015，23(6)：1 039-1 044.(in Chinese))
[10]	邓华锋. 库水变幅带水-岩作用机制和作用效应研究[博士学位论文][D]. 武汉：武汉大学，2010.(DENG Huafeng. Study on the mechanism and effects of water-rock interaction under water level change region[Ph. D. Thesis][D]. Wuhan：Wuhan University，2010.(in Chinese))
[11]	邓华锋，李建林，王孔伟，等.“饱和-风干”循环过程中砂岩次生孔隙率变化规律研究[J]. 岩土力学，2012，33(2)：483-488. (DENG Huafeng，LI Jianlin，WANG Kongwei，et al. Research on secondary porosity changing law of sandstone under saturation-air dry cycles[J].Rock and Soil Mechanics，2012，33(2)：483-488.(in Chinese))
[12]	DENG H，YUAN X，WANG L，et al. Experimental research on changes in the mechanical property law of reservoir bank sandstone under“immersion-air dry”circulation[J]. Environmental Engineering andManagement Journal，2013，12(9)：1785-1789.
[13]	刘特洪，林天健.软岩工程设计理论与施工实践[M]. 北京：中国建筑工业出版社，2001：5.(LIU Tehong，LIN Tianjian. Soft rock engineering design theory and construction practice[M]. Beijing：China Architectureand Building Press，2001：5.(in Chinese))
[14]	FRANCLSS FO. Weak rock tunneling[M]. [S.l.]：A. A. Balkema Press，1997：56-65.
[15]	刘长武，陆士良.泥岩遇水崩解软化机制的研究[J]. 岩土力学，2000，21(3)：28-31.(LIU Changwu，LUShiliang，Research on mechanism of mudstone degradation and softening in water[J]. Rock and Soil Mechanics，2000，21(3)：28-31.(in Chinese))
[16]	ARNOULD M. Discontinuity networks in mudstones：A geological approach[J]. Bulletin of Engineering Geology and the environment，2006，65(4)：413-422.
[17]	黄宏伟，车平.泥岩遇水软化微观机制研究[J]. 同济大学学报：自然科学版，2007，35(7)：866-870.(HUANG Hongwei，CHE Ping. Research on micro-mechanism of softening and argillitization of mudstone[J]. Journal of Tongji University：Natural Science，2007，35(7)：866-870.(in Chinese))
[18]	周翠英，邓毅梅，谭祥韶. 饱和软岩力学性质软化的试验研究与应用[J]. 岩石力学与工程学报，2005，24(1)：33-38.(ZHOU Cuiying，DENG Yimei，TAN Xiangshao. Experimental research on the softening of mechanical properties of saturated soft rocks and application[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(1)：33-38.(in Chinese))
[19]	周翠英，朱凤贤，张磊.软岩饱水试验与软化临界现象研究[J].岩土力学，2010，31(6)：1 709-1 715.(ZHOU Cuiying，ZHU Fengxian，ZHANG Lei. Research on saturation test and softening critical phenomenon of soft rocks[J]. Rock and Soil Mechanics，2010，31(6)：1 709-1 715.(in Chinese))
[20]	王运生，吴俊峰，魏鹏，等.四川盆地红层水岩作用岩石弱化时效性研究[J]. 岩石力学与工程学报，2009，28(1)：3 102-3 107. (WANG Yunsheng，WU Junfeng，WEI Peng，et al，Research on time effect of rock weakening by water-rock interaction of redbeds in Sichuan basin[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(1)：3 102-3 107.(in Chinese))
[21]	宋磊.红层软岩遇水软化的微细观机理研究[硕士学位论文][D]. 成都：西南交通大学，2014.(SONG Lei. Research of micro-and meso-softening mechanism of redbeds soft rock with water[M. S. Thesis][D]. Chendu：Southwest Jiaotong University，2014.(in Chinese))
[22]	邓华锋，李建林，邓成进，等. 岩石力学试验中岩样选择和抗压强度预测方法研究[J]. 岩土力学，2011，32(11)：3 399-3 403.(DENG Huafeng，LI Jianlin，DENG Chengjin，et al. Analysis of sampling in rock mechanics test and compressive strength prediction methods[J]. Rock and Soil Mechanics，2011，32(11)：3 399-3 403.(in Chinese))