[1]薛喜成,张玲玉,段 钊.泾阳南塬黄土滑坡刮铲推覆构造与滑带土微观结构[J].西安科技大学学报,2020,(01):102-109.
 XUE Xi-cheng,ZHANG Ling-yu,DUAN Zhao.Scraping-nappe structure and microstructure of the loess landslide in south Jingyang Plateau[J].Journal of Xi'an University of Science and Technology,2020,(01):102-109.
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泾阳南塬黄土滑坡刮铲推覆构造与滑带土微观结构(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2020年01期
页码:
102-109
栏目:
出版日期:
2020-02-15

文章信息/Info

Title:
Scraping-nappe structure and microstructure of the loess landslide in south Jingyang Plateau
文章编号:
1672-9315(2020)01-0102-08
作者:
薛喜成张玲玉段 钊
(西安科技大学 地质与环境学院,陕西 西安 710054)
Author(s):
XUE Xi-chengZHANG Ling-yuDUAN Zhao
(Cllege of Geology and Environment,Xi'an University of Science and Technology,Xi'an 710054,China)
关键词:
刮铲推覆构造 微观结构 滑带土 黄土滑坡 泾阳南塬
Keywords:
scraping-nappe structure microstructure slipping zone soil loess landslides south Jingyang Plateau
分类号:
P 694
文献标志码:
A
摘要:
泾阳南塬黄土滑坡刮铲推覆构造反应了一种典型的表生地质动力作用现象。通过野外调查,开挖探槽及SEM样品处理,综合分析泾阳南塬黄土滑坡原状土及滑带土的物理性质和微观结构,包括矿物成分、颗粒级配、孔隙度、方向频率、丰度和分形维数等特征,结合黄土滑坡前缘冲击阶地并对阶地刮铲推覆作用及逆冲剪断、液化、竖向渗流通道等细观现象,反演滑坡运动过程,并对滑坡运动过程中的力学状态进行解释。结果表明:土体微观结构特征与滑坡细观现象和刮铲推覆构造的产生有必然的联系。原状土体颗粒定向显著,孔隙度较大,孔隙连通性较好,在外力作用下易形成裂隙贯通和发生液化,进而形成竖向渗流通道和地表涌沙现象; 滑带土粒径不均匀系数增大,孔隙度减小,孔隙形状改变,定向性减弱,单元体分形维数增大,这是滑坡运动过程中受挤压剪切作用,颗粒发生碰撞,孔隙水溢出的结果; 而滑带土前缘较中部孔隙更为密实,孔隙度差异较小,颗粒分形维数较小,这是由于滑坡前缘为滑坡刮铲阶地推覆作用形成,主要受挤压作用,受力集中且均匀。
Abstract:
The scraping-nappe structure of loess landslide in south Jingyang Plateau reflects a typical epiphytic geologic dynamic phenomenon.Through field investigation,excavation and SEM sample processing,physical properties and the microstructure of the loess landslide undisturbed soil and slipping zone soil in south Jingyang Plateau are analyzed,including mineral composition,particle size distribution,porosity,direction frequency,abundance and the fractal dimension and so on.In view of the the front of landslide impact terrace,cause scraping-nappe structure and subtle-phenomenon such as cut and thrust nappe action and liquefaction,mechanical state in the process of landslide movement is explained.The results show that the characteristics of soil microstructure are inexorably linked with the scraping-nappe structure and subtle-phenomenon of the landslide.The undisturbed soil particles have obvious orientations,large porosity and good pore connectivity,which are easy to break through and liquefy under the action of external forces.The non-uniform coefficient ofslipping zone soil particle increases,porosity decreases,pore shape changes,directional sex is abate,and granular fractal dimension increase.All these are affected by extrusion shearing action in the process of the landslide movement.Front slipping zone than is denser the central,pore is more close-grained,porosity difference is small,and granular fractal dimension is small.All these are due to the front of landslide scaling terraces formed by the nappe,which is mainly formed mainly by extrusion process,with the stress centralized and uniform.

参考文献/References:

[1] 赵 涛,杨更社,奚家米,等.白垩系砂岩宏细观冻融损伤特性试验研究[J].西安科技大学学报,2019,39(2):241-248. ZHAO Tao,YANG geng-she,XI Jia-mi,et al.Experimental study of the macro and micro-scopic damage of Cretaceous sandstone subjected to freeze-thaw cycles[J].Journal of Xi'an University of Science and Technology,2019,39(2):241-248. [2]张先伟,孔令伟,郭爱国,等.基于SEM和MIP试验结构性黏土压缩过程中微观孔隙的变化规律[J].岩石力学与工程学报,2012,31(2):406-412. ZHANG Xian-wei,KONG Ling-wei,GUO Ai-guo,et al.Evolution of microscopic pore of structured clay in compression process based on SEM and test[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(2):406-412. [3]张先伟,王常明,李军霞,等.蠕变条件下软土微观孔隙变化特性[J].岩土力学,2010,31(4):1061-1067. ZHANG Xian-wei,WANG Chang-ming,LI Jun-xia,et al.Variation characteristics of soft clay micropore in creep condition[J].Rock and Soil Mechanics,2010,31(4):1061-1067. [4]谷天峰,王家鼎,郭 乐,等.超基于图像处理的Q3黄土的微观结构变化研究[J].岩石力学与工程学报,2011,30(S1):3185-3192. GU Tian-feng,WANG Jia-ding,GUO Le,et al.Study of Q3 losses microstructure changes based on image processing[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(S1):3185-3192. [5]宋丙辉,谌文武,吴玮江,等.舟曲锁儿头滑坡滑带土微结构的分形研究[J].岩土工程学报,2011,33(S1):299-304. SONG Bing-hui,CHEN Wen-wu,WU Wei-jiang,et al.Microstructure fractal of sliding zone soil of Suoertou landslide in Zhouqu[J].Chinese Journal of Geotechnical Engineering,2011,33(S1):299-304. [6]任 权,王家鼎,谷天峰,等.滑带黄土孔隙微结构参数与动应力关系研究[J].水土保持通报,2013,33(1):103-105. REN Quan,WANG Jia-ding,GU Tian-feng,et al.Relationships betweenporosity microstructure paraments of slide-zone soil and dynamic stress[J].Bulletin of Soil and Water Consercation,2013,33(1):103-105. [7]刘 动,陈晓平.滑带土环剪剪切面的微观观测与分析[J].岩石力学与工程学报,2013,32(9):1827-1834. LIU Dong,CHEN Xiao-ping.Microscropic observation and analysis of ring shear surface of slip zone soil[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(9):1827-1834. [8]周 建,邓以亮,曹 洋,等.杭州饱和软土固结过程微观结构试验研究[J].中南大学学报(自然科学版),2014,45(6):1998-2005. ZHOU Jian,DENG Yi-liang,CAO Yang,et al.Experimental study of microstructure of Hangzhou saturated soft soil during consolidation process[J].Journal of Central South University(Science and Technology),2014,45(6):1998-2005. [9]王 雷,赵法锁,程晓辉,等.黄土基岩接触面滑坡滑带土物理力学特性及微观结构[J].地球科学与环境学报,2017,39(3):450-458. WANG Lei,ZHAO Fa-suo,CHENG Xiao-hui,et al.Physical and mechanical properties and microstructures of slip soil of loess bedrock contact landslide[J].Journal of Earth Sciences and Enviroment,2017,39(3):450-458. [10]WANG Ming-wu,XU Peng,LI Jian,et al.Microstructure and unsaturated geotechnical properties of net-like red doils in Xuancheng,China[J].Journal of Testing and Evaluation,2015,43(2):385-397. [11]吴 凯,倪万魁,刘海松,等.压实黄土强度特性与微观结构变化关系研究[J].水文地质工程地质,2016,43(5):62-69. WU Kai,NI Wan-kui,LIU Hai-song,et al.Study on the relationship between strength characteristics and microstructure changes of compacted loess[J].Hydrogeology & Engineering Geology,2016,43(5):62-69. [12]叶万军,李长清,李 晓,等.溶蚀作用对黄土体物理力学性质影响的试验[J].西安科技大学学报,2019,39(4):610-618. YE Wan-jun,LI Chang-qing,LI Xiao,et al.Experiment on the effect of rainfall erosion on physical and mechanical properties of loess[J].Journal of Xi'an University of Science and Technology,2019,39(4):610-618. [13]祁 昊,冯文凯,陈建峰,等.降雨作用下冰水堆积体角砾土强度变化的微观机制[J].工程地质学报,2017,25(3):731-739. QI Hao,FENG Wen-kai,CHEN Jian-feng,et al.The micro-mechanism of strength changes of breccia soil in outwash deposit under rainfall at Huangxi[J].Journal of Engineering Geology,2017,25(3):731-739. [14]周 晖,吴俊桦.软土固结过程中基于分形理论的孔隙微观参数研究[J].广东工业大学学报,2017,34(4):41-46. ZHOU Hui,WU Jun-hua.A research on microscopic parameters of soft soil pore based on fractal theory in the process of consolidation[J].Journal of Guangdong University of Technology,2017,34(4):41-46. [15]李华斌.滑坡滑带土微结构的定量研究及其应用[D].北京:中国地质科学院,1992. LI Hua-bin.The quantitative research of soil microstructure on slidsurface of landslide and its application[D].Beijing:Chinese Academy of Geological Sciences,1992. [16]赵 洲,魏江波.基于颗粒流方法的滑坡破坏机理与强度分析[J].西安科技大学学报,2018,38(4):611-619. ZHAO Zhou,Wei Jiang-bo.Landslide failure mechanism and intensity analysis based on PFC2D[J].Journal of Xi'an University of Science and Technology,2008,38(4):611-619. [17]YAN Chun-jie,SUN Yun-zhi,TANG Hui-ming.Surface microtextures of slipping zone soil of some landslides in the three gorges reservoir district and their significance[J].ActaGeologica Sinica,2000,74(2):349-352. [18]严春杰,唐辉明,陈洁渝,等.三峡库区典型滑坡滑带土微结构和物质组分研究[J].岩土力学,2002(S1):23-26. YAN Chun-jie,TANG Hui-ming,CHEN Jie-yu,et al.Studies of soil microstructures and composition of slipping zone in reservoir district of Three Gorges profect[J].Rock and Soil Mechanics,2002(S1):23-26. [19]谭罗荣,张梅英,邵梧敏,等.灾害性膨胀土的微结构特征及其工程性质[J].岩土工程学报,1994,16(2):48-57. TAN Luo-rong,ZHANG Mei-ying,SHAO Wu-min,et al.Microstructure characteristics and engineering properties of expansive soil[J].Chinese Journal of Geotechnical Engineering,1994,16(2):48-57. [20]王宝军,施 斌,刘志彬,等.基于GIS的黏性土微观结构的分形研究[J].岩土工程学报,2004,26(2):244-247. WANG Bao-Jun,SHI Bin,LIU Zhi-bin,et al.Fracal study on microstructure of clayey soil by GIS[J].Chinese Journal of Geotechnical Engineering,2004,26(2):244-247. [21]HE Yu-rong,CUI Peng,LIAO Chao-lin,et al.Micromorphology of landslide soil case study on the Jibazi landslide in Yunyang in the three gorges region,China[J].Journal of Mountain Science,2006,3(2):147-157. [22]邓茂林,许 强,韩 蓓,等.武隆鸡尾山滑坡滑带软岩微观结构与流变特性[J].山地学报,2014,32(2):233-240. DENG Mao-lin,XU Qiang,HAN Bei,et al.The microscopic structure and rheological characteristics of the slip zone soft rock of Jiweishan landslide in Wulong of Chongqing,China[J].Mountain Research,2014,32(2):233-240. [23]陈 剑,安孟可,龙 维,等.云南汤家山松散堆积层滑坡滑带土的微观结构与机理分析[J].工程勘察,2015,43(1):5-10,25. CHEN Jian,AN Meng-ke,LONG Wei,et al.Microstructure and mechanism analysis on the slip zone soil of Tangjiashan loose-deposits landslide in Yunnan province[J].Geotechnical Investigation and Surveying,2015,43(1):5-10,25. [24]段 钊,李文可,王启耀.泾河下游台塬区黄土滑坡类型与时空分布规律[J].西安科技大学学报,2015,35(3):369-375. DUAN Zhao,LI Wen-ke,WANG Qi-yao.Types and spatial-temporal distribution of loess landslides in the south plateau of lower Jing river[J].Journal of Xi'an University of Science and Technology,2015,35(3):369-375. [25]李晓军,王晓华,谢晓婷,等.一种基于矿物标准色数据库的矿物组分识别方法[P].陕西:CN1047000 97A,2015-06-10. LI Xiao-jun,WANG Xiao-hua,XIE Xiao-ting,et al.A mineral component identification method based onmineral standard color database[P].Shaanxi:CN104700097A,2015-06-10. [26]XU Ling,DAI Fu-chu,THAM L G,et al.Landslides in the transitional slopes between a loess platform and river terrace,Northwest China[J].Environmental & Engineering Geoscience,2011,17(3):267-279. [27]郑志勇.黄土滑坡的形成机理[J].西安科技大学学报,2008,28(4):694-697. ZHENG Zhi-yong.Analysis on the formative mechanism of the loess landslides in Tongchuan[J].Journal of Xi'an University of Science and Technology,2008,28(4):694-697. [28]李振林.砂土地震液化判别方法的综合应用[J].西安科技大学学报,2010,30(4):451-456. LI Zhen-lin.Comprehensive application of seismic liquefaction identification method for sandy soil[J].Journal of Xi'an University of Science and Technology,2010,30(4):451-456. [29]王念秦,杨盼盼,王得楷,等.盐锅峡黑方台黄土塬塬坡地下水浸润带研究[J].西安科技大学学报,2017,37(1):51-56. WANG Nian-qin,YANG Pan-pan,WANG De-kai,et al.Research on groundwater infiltration zone in loess slope of Heifangtai,Yanguoxia Gorge[J].Journal of Xi'an University of Science and Technology,2017,37(1):51-56. [30]Clement C,Toussaint R,Stojanova M,et al.Sinking during earthquakes:Critical acceleration criteria control drained soil liquefaction[J].Physical Review E,2018,97(2-1).

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备注/Memo

备注/Memo:
收稿日期:2019-07-10 责任编辑:李克永
基金项目:国家自然科学基金(51808443); 陕西省自然科学基础研究计划(2018JM5167); 中国博士后科学基金(2017M613166)
通信作者:关 虓(1984-),男,陕西西安人,博士,讲师,E-mail:86484869@qq.com
更新日期/Last Update: 2020-02-15