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秦巴山区浅层滑坡内动力地质成因分析

熊炜 刘可 范文

熊炜, 刘可, 范文, 2018. 秦巴山区浅层滑坡内动力地质成因分析. 地质力学学报, 24 (3): 424-431. DOI: 10.12090/j.issn.1006-6616.2018.24.03.044
引用本文: 熊炜, 刘可, 范文, 2018. 秦巴山区浅层滑坡内动力地质成因分析. 地质力学学报, 24 (3): 424-431. DOI: 10.12090/j.issn.1006-6616.2018.24.03.044
XIONG Wei, LIU Ke, FAN Wen, 2018. ANALYSIS ON INTERNAL DYNAMIC GEOLOGICAL GENESIS OF SHALLOW LANDSLIDE IN QIN-BA MOUNTAIN AREA. Journal of Geomechanics, 24 (3): 424-431. DOI: 10.12090/j.issn.1006-6616.2018.24.03.044
Citation: XIONG Wei, LIU Ke, FAN Wen, 2018. ANALYSIS ON INTERNAL DYNAMIC GEOLOGICAL GENESIS OF SHALLOW LANDSLIDE IN QIN-BA MOUNTAIN AREA. Journal of Geomechanics, 24 (3): 424-431. DOI: 10.12090/j.issn.1006-6616.2018.24.03.044

秦巴山区浅层滑坡内动力地质成因分析

doi: 10.12090/j.issn.1006-6616.2018.24.03.044
基金项目: 

国家自然科学基金 41502288

国家自然科学基金 41272282

广西交通投资集团有限公司博士后基金 2014

中国地质调查局地质调查工作项目 1212011220135

中央高校基本科研业务费专项资金资助 310826161015

详细信息
    作者简介:

    熊炜(1984-), 男, 博士, 讲师, 主要从事地质灾害机理与防控研究。E-mail:phdxiong@163.com

    通讯作者:

    刘可(1967-), 男, 博士, 教授级高级工程师, 从事高速公路建设管理工作。E-mail:dr_lk@163.com

  • 中图分类号: P642.22

ANALYSIS ON INTERNAL DYNAMIC GEOLOGICAL GENESIS OF SHALLOW LANDSLIDE IN QIN-BA MOUNTAIN AREA

  • 摘要: 以秦巴山区安康市汉滨区洪山镇淀沟浅层滑坡为例,通过区域宏观构造、边坡细观结构、岩石微观构造等多种尺度详细剖析浅层滑坡的变形破坏特征及内动力地质成因。研究表明:秦巴山区浅层滑坡的成因机理与内动力地质条件密不可分。滑坡多发育于软弱变质岩区,受区域构造活动影响,褶皱、断层等宏观构造在区内连续、交错分布,造成岩石内部的矿物发生变形、拉长、剪断等,形成韧性剪切带,并产生大量微裂隙,多期次岩脉填充交切,使岩体性质更加劣化。当应力超过岩石强度时,内部片层状结构发生弯曲、折断、压裂等一系列微观变形,是变质岩主要的变形破坏方式。区内断层与滑坡斜交,岩层及褶皱枢纽产状与滑坡坡向同向同倾,也为滑坡的形成提供了良好的孕灾条件。这种相对脆弱的地质环境再受到人类活动和降雨等外动力因素影响,极易引发浅层滑坡,进而对附近居民及建筑物产生严重威胁。

     

  • 图  1  滑坡后缘基岩

    Figure  1.  Bedrock of trailing edge of the Diangou landslide

    图  2  滑坡工程地质图

    1—滑坡周界;2—本次滑动范围;3—逆断层;4—裂缝;5—陡坎;6—剖面线

    Figure  2.  Engineering geological map of the Diangou landslide

    图  3  滑坡区域地质构造图(据1 : 5万地质图修改)

    1—耀岭河组;2—鲁家坪组;3—箭竹坝组;4—洞河组;5—二长岩;6—滑坡;7—韧性剪切带;8—逆断层;9—平移断层

    Figure  3.  Geological structure map of the landslide area (Modified after 1 : 50000 geological map)

    图  4  实测地质剖面图

    1—云母片岩;2—碳质片岩;3—含碳硅钙质板岩;4—含碳云母石英片岩;5—韧性剪切带;6—采样位置及样品编号;7—断层;8—褶皱变形;9—共轭节理赤平投影;10—滑坡

    Figure  4.  Measured geological profile

    图  5  褶皱枢纽等密图

    Figure  5.  Contour diagram of fold hinge

    图  6  矿物被拉长(SPIB-4,正交偏光)

    Figure  6.  Stretched minerals (SPIB-4, crossed polar)

    图  7  节理等密图

    Figure  7.  Contour diagram of joints

    图  8  岩石的微观构造(正交偏光)

    Figure  8.  Microscopic structure of rocks(crossed polar)

    图  9  变形破坏前微观形态

    Figure  9.  Morphology before deformation and failure

    图  10  岩石变形破坏微观模式

    Figure  10.  Rock microscopic deformation and failure mode

    表  1  岩样软化性质试验结果表

    Table  1.   The results of rock softening property test

    组号 状态 片理面关系 单轴抗压强度/MPa 软化系数
    试验值 均值
    1 1 干燥 垂直 27.1 28.6 0.60
    2 22.2
    3 36.4
    2 4 饱和 垂直 18.9 17.2
    5 16.3
    6 16.3
    3 7 干燥 平行 30.4 26.2 0.40
    8 22.0
    9 26.0
    4 10 饱和 平行 11.8 10.6
    11 8.3
    12 11.7
    下载: 导出CSV

    表  2  岩石自由膨胀率试验结果表

    Table  2.   The results of rock free expansion rate test

    组号 浸水前尺寸/mm 浸水后尺寸/mm 径向膨胀率/% 轴向膨胀率/%
    边长 高度 边长 高度
    1 50.12 98.65 50.25 98.85 0.259 0.202
    2 50.78 100.43 50.91 100.66 0.256 0.229
    3 51.02 99.98 51.13 100.18 0.215 0.200
    4 49.67 101.34 49.79 101.54 0.241 0.197
    下载: 导出CSV

    表  3  岩石强度劣化试验结果表

    Table  3.   The results of rock strength degradation test

    条件 组号 单轴抗压强度/MPa 与初始强度比值
    试验值 均值
    初始 1 27.2 28.63 100
    2 22.2
    3 36.5
    循环6次 4 25.3 26.53 87.19
    5 30.2
    6 24.1
    循环12次 7 22.4 24.47 82.65
    8 26.7
    9 24.3
    循环18次 10 25.7 22.6 80.33
    11 22.3
    12 19.8
    循环24次 13 21.0 21.17 78.58
    14 18.8
    15 23.7
    下载: 导出CSV
  • [1] 熊炜, 范文.秦巴山区浅表层滑坡成灾规律研究[J].灾害学, 2014, 29(1):228~233. http://www.cqvip.com/QK/94474X/201401/48402732.html

    XIONG Wei, FAN Wen. Disaster law of shallow landslide in Qin-ba mountain region[J]. Journal of Catastrophology, 2014, 29(1):228~233. (in Chinese with English abstract) http://www.cqvip.com/QK/94474X/201401/48402732.html
    [2] 熊炜. 秦巴山区软弱变质岩浅表层滑坡成因机理研究[D]. 西安: 长安大学, 2012. http://cdmd.cnki.com.cn/Article/CDMD-10710-1013017289.htm

    XIONG Wei. Study on the cause mechanism of shallow landslide of weak metamorphic in the Qin-ba Mountain Region[D]. Xi'an: Chang'an University, 2012. (in Chinese with English abstract) http://cdmd.cnki.com.cn/Article/CDMD-10710-1013017289.htm
    [3] 范立民, 何进军, 李存购.秦巴山区滑坡发育规律研究[J].中国地质灾害与防治学报, 2004, 15(1):44~48. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zgdzzhyfzxb200401009

    FAN Limin, HE Jinjun, LI Cungou. Study on development patterns of landslide in Qinling-Bashan Mountains[J]. The Chinese Journal of Geological Hazard and Control, 2004, 15(1):44~48. (in Chinese with English abstract) http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zgdzzhyfzxb200401009
    [4] 王雁林.陕南地区滑坡灾害气象预报预警及其防范对策探析[J].地质灾害与环境保护, 2005, 16(4):345~349. http://www.cnki.com.cn/Article/CJFDTotal-YTLX200705040.htm

    WANG Yanlin. Study on the early-warning and prediction of land-slide hazards and countermeasures in the southern Shaanxi Province[J]. Journal of Geological Hazards and Environment Preservation, 2005, 16(4):345~349. (in Chinese with English abstract) http://www.cnki.com.cn/Article/CJFDTotal-YTLX200705040.htm
    [5] 陕西省减灾协会.秦巴山区山地自然灾害[M].西安:世界图书出版公司, 1999.

    Shaanxi Provincial Institute for Disaster Reduction. Mountain natural disasters in Qinba Mountain[M]. Xi'an:World Publishing Company in Xi'an, 1999. (in Chinese)
    [6] 吴树仁, 张永双, 韩金良, 等.三峡水库引水工程秦巴段工程地质条件研究[J].地球学报, 2006, 27(5):487~494. http://www.oalib.com/paper/4895614

    WU Shuren, ZHANG Yongshuang, HAN Jinliang, et al. The engineering geological conditions of the Qingling-Dabashan Sector of the water diversion project from the Three Gorges Reservoir to the Yellow River[J]. Acta Geoscientica Sinica, 2006, 27(5):487~494. (in Chinese with English abstract) http://www.oalib.com/paper/4895614
    [7] 石玲, 张永双, 石菊松.三峡引水工程秦巴段主要地质灾害及其工程影响[J].工程地质学报, 2009, 17(2):212~219. http://www.cqvip.com/QK/98122X/200902/30121852.html

    SHI Ling, ZHANG Yongshuang, SHI Jusong. Surface geohazards at Qinling-Daba Mountain and impact on Three Gorges water diversion project[J]. Journal of Engineering Geology, 2009, 17(2):212~219. (in Chinese with English abstract) http://www.cqvip.com/QK/98122X/200902/30121852.html
    [8] 杜继稳.降雨型地质灾害预报预警[M].北京:科学出版社, 2010.

    DU Jiwen. Forecasting and warning of rainfall type geological disaster[M]. Beijing:Science Press, 2010. (in Chinese)
    [9] Seok K M, Onda Y, Uchida T, et al. Effect of seepage on shallow landslides in consideration of changes in topography:case study including an experimental sandy slope with artificial rainfall[J]. CATENA, 2018, 161:50~62. doi: 10.1016/j.catena.2017.10.004
    [10] 张二朋.秦巴及邻区地质-构造特征概论[M].北京:地质出版社, 1993.

    ZHANG Erpeng. Geological and tectonic features in Qinba and its adjacent areas[M]. Beijing:Geological Publishing House, 1993. (in Chinese)
    [11] 杨志华.秦岭造山带的构造格架和构造单位新划分[J].地质科技情报, 1996, 15(3):43~48. http://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ603.006.htm

    YANG Zhihua. Tectonic pattern and redivision of tectonic units of the Qinling Orogen[J]. Geological Science and Technology Information, 1996, 15(3):43~48. (in Chinese with English abstract) http://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ603.006.htm
    [12] Zhang G W, Xiang L W, Meng Q R. The Qinling orogenic and intracontinental orogenic mechanism[J]. Episodes, 1995, 18(1~2):36~39. http://www.researchgate.net/publication/285388602_The_Qinling_Orogen_and_intracontinental_orogen_mechanism
    [13] 张国伟.秦岭造山带与大陆动力学[M].北京:科学出版社, 2001.

    ZHANG Guowei. Qinling orogenic belt and continental dynamics[M]. Beijing:Science Press, 2001. (in Chinese)
    [14] 郭长宝, 张永双, 王涛, 等.南北活动构造带中段地质灾害与重大工程地质问题概论[J].地质力学学报, 2017, 23(5):707~722. http://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?flag=1&file_no=20170508&journal_id=dzlxxb

    GUO Changbao, ZHANG Yongshuang, WANG Tao, et al. Discussion on geological hazards and major engineering geological problems in the middle part of the north-south active tectonic zone, China[J]. Journal of Geomechanics, 2017, 23(5):707~722. (in Chinese with English abstract) http://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?flag=1&file_no=20170508&journal_id=dzlxxb
    [15] 吴中海, 周春景, 谭成轩, 等.长江经济带地区活动构造与区域地壳稳定性基本特征[J].地质力学学报, 2016, 22(3):379~411. http://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?flag=1&file_no=20160301&journal_id=dzlxxb

    WU Zhonghai, ZHOU Chunjing, TAN Chengxuan, et al. The active tectonics and regional crustal stability features in the area of Yangtze River Economic Belt[J]. Journal of Geomechanics, 2016, 22(3):379~411. (in Chinese with English abstract) http://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?flag=1&file_no=20160301&journal_id=dzlxxb
    [16] 任建喜, 葛修润, 杨更社.单轴压缩岩石损伤扩展细观机理CT实时试验[J].岩土力学, 2001, 22(2):130~133. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=slxb200201003

    REN Jianxi, GE Xiurun, YANG Gengshe. CT real-time testing on damage propagation microscopic mechanism of rock under uniaxial compression[J]. Rock and Soil Mechanics, 2001, 22(2):130~133. (in Chinese with English abstract) http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=slxb200201003
    [17] 陈文玲, 赵法锁, 弓虎军.基于微观试验的云母石英片岩蠕变损伤变量研究[J].岩石力学与工程学报, 2010, 29(S1):2661~2666. http://mall.cnki.net/magazine/Article/YSLX2011S1009.htm

    CHEN Wenling, ZHAO Fasuo, GONG Hujun. Study of creep damage variable of mica-quartzose schist based on microscopic test[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(S1):3578~3584. (in Chinese with English abstract) http://mall.cnki.net/magazine/Article/YSLX2011S1009.htm
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  • 收稿日期:  2018-02-11
  • 修回日期:  2018-04-08
  • 刊出日期:  2018-06-01

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