Volume 45 Issue 3
Jun.  2017
Turn off MathJax
Article Contents
Abstract
References
Related Articles
HUANG Lei, LI Xi'an, CAI Weibin, QIAO Lu. Simulation of collapsible characteristics of Malan loess in Yan'an new area by PFC2D[J]. COAL GEOLOGY & EXPLORATION, 2017, 45(3): 119-124. DOI: 10.3969/j.issn.1001-1986.2017.03.022
Citation: HUANG Lei, LI Xi'an, CAI Weibin, QIAO Lu. Simulation of collapsible characteristics of Malan loess in Yan'an new area by PFC2D[J]. COAL GEOLOGY & EXPLORATION, 2017, 45(3): 119-124. DOI: 10.3969/j.issn.1001-1986.2017.03.022
shu

Simulation of collapsible characteristics of Malan loess in Yan'an new area by PFC2D

  • 1. Geology Engineering and Surveying, Chang'an University, Xi'an 710054, China;

  • 2. Water Conservancy and Civil Engineering College of Inner Mongolia Agricultural University, Hohhot 010018, China;

  • 3. Sichuan Provincial Research lnstitute of Design and Survey of Coalfield Geological Engineering, Chengdu 610072, China

Funds: 

National Natural Science Foundation of China(41572264,41172255,41440044)

More Information
  • Received Date: July 15, 2016
  • Published Date: June 24, 2017
    Graphical Abstract
    • Abstract
  • In order to deeply understand the grain effect of Malan Loess in Yan'an new area and to reveal its collapse mechanism, firstly scanning electron microscope was used to observe the microstructure characteristics of loess, and IPP image processing software was used to analyze quantitatively loess particles. Then, based on discrete element theory, the particle flow PFC2D program was used to simulate the distribution of the undisturbed loess particles and the interaction between the particles in Yan'an new area under different buried depth. The microstructure structure characteristics of the natural loess were visually reproduced. The relationship among the distribution of particles, the contact force and the collapsibility was analyzed. The results show that the structure strength of soil was determined by the action of the skeleton particles, especially the contact force of aggregate contact was dominant. With increase of depths, the loess skeleton particles transit gradually from point-contact to aggregate structure, the contact force decreased also significantly. The PFC2D method provides a new idea for the research on the formation mechanism of loess collapsibility.
    • FullText(HTML)
    • References (23)
  • [1]
    高国瑞. 黄土微结构分类与湿陷性[J]. 中国科学,1980, 10(12):1203-1208.

    GAO Guorui. Microstructure classification and collapsibility of loess soils[J]. Science in China,1980,10(12):1203-1208.
    [2]
    王永炎,滕志宏. 中国黄土的微结构及其在时代上和区域上的变化-扫描电子显微镜下的研究[J]. 科学通报,1982,27(2):102-105.

    WANG Yongyan,TENG Zhihong. A study on loess microstructure and its variation with age and region in China based on the scanning electron microscope[J]. Chinese Science Bulletin, 1982,27(2):102-105.
    [3]
    王永炎,林在贯. 中国黄土的结构特征及物理力学性质[M]. 北京:科学出版社,1990.
    [4]
    雷祥义. 黄土显微结构类型与物理力学性质指标之间的关系[J]. 地质学报,1989,63(2):182-190.

    LEI Xiangyi. The relation between loess micro-texture types and physical-mechanical parameters[J]. Acta Geologica Sinica, 1989,63(2):182-190.
    [5]
    雷祥义. 中国黄土的孔隙类型与湿陷性[J]. 中国科学(B辑), 1987,17(12):1309-1318.

    LEI Xiangyi. Pore type of loess in China and collapsibility[J]. Science China (Series B),1987,17(12):1309-1318.
    [6]
    胡再强,沈珠江,谢定义. 非饱和黄土的显微结构与湿陷性[J]. 水利水运科学研究,2000,19(2):68-71.

    HU Zaiqiang,SHEN Zhujiang,XIE Dingyi. Microstructure and collapsibility of unsaturated loess[J]. Rsearch of Hydro-Sciences, 2000,19(2):68-71.
    [7]
    沙爱民,陈开圣. 压实黄土的湿陷性与微观结构的关系[J]. 长安大学学报(自然科学版),2006,26(4):1-4.

    SHA Aimin,CHEN Kaisheng. Relationship between collapsibility and microstructure of compacted loess[J]. Journal of Chang'an University(Natural Science Edition),2006,26(4):1-4.
    [8]
    李开超,王家鼎,王欢,等. 高速铁路地基黄土湿陷前后微结构变化研究[J]. 地下水,2009,31(5):114-116.

    LI Kaichao,WANG Jiading,WANG Huan,et al. Study on microstructure changes before and after loess collapse in the foundation of high speed railway[J]. Ground water,2009,31(5):114-116.
    [9]
    宋焱勋,王兴刚. 陇东地区黄土湿陷性研究[J]. 土工基础, 2004,18(4):37-40.

    SONG Yanxun,WANG Xinggang. Research into the collapsibility of loess in Longdong district[J]. Soil Engineering and Foundation,2004,18(4):37-40.
    [10]
    张豫川,羊群芳,张兴元,等. 基于湿陷性和震陷性的黄土微结构[J]. 兰州大学学报(自然科学版),2011,47(2):72-76.

    ZHANG Yuchuan,YANG Qunfang,ZHANG Xingyuan,et al. Microstructure of loess based on collapsibility and seismic subsidence[J]. Journal of Lanzhou Univcrsity(Natural Science), 2011,47(2):72-76.
    [11]
    张永双,曲永新. 陕北晋西砂黄土的胶结物与胶结作用研究[J]. 工程地质学报,2005,13(1):18-28.

    ZHANG Yongshuang,QU Yongxin. Cement of sand loess and their cementation in north Shaanxi and west Shanxi[J]. Journal of Engineering Geology,2005,13(1):18-28.
    [12]
    CUNDALL P A,STRACK O D L. Particle flow code in 2 Dimensions[M]. Itasca Consulting Group,Incorporation,1999.
    [13]
    CUNDALL P A,STRACK O D L. A discrete numerical model for granular assemblies[J]. Geotechnique,1979,29(1):47-65.
    [14]
    周健,池永,池毓蔚,等. 颗粒流方法及PFC2D程序[J]. 岩土力学,2000,21(3):271-274.

    ZHOU Jian,CHI Yong,CHI Yuwei,et al. The method of particle flow and PFC2D code[J]. Rock and Soil Mechanics,2000,21(3):271-274.
    [15]
    周健,贾敏才. 土工细观模型试验与数值模拟[M]. 北京:科学出版社,2008.
    [16]
    张刚,周健,姚志雄. 堤坝管涌的室内试验与颗粒流细观模拟研究[J]. 水文地质工程地质,2007,34(6):83-86.

    ZHANG Gang,ZHOU Jian,YAO Zhixiong. Lab test of dam piping and study on meso-scale simulation of grain flow[J]. Hydrogeology and Engineering Geology,2007,34(6):83-86.
    [17]
    姚志雄,周健,张刚. 砂土管涌机理的细观试验研究[J]. 岩土力学,2009,30(6):1604-1610.

    YAO Zhixiong,ZHOU Jian,ZHANG Gang. Meso-experimental research on piping mechanism in sandy soils[J]. Rock and Soil Mechanics,2009,30(6):1604-1610.
    [18]
    郑晏武. 中国黄土的湿陷性[M]. 北京:地质出版社,1982.
    [19]
    蒋明镜,张望城,孙渝刚,等. 理想胶结砂土力学特性及剪切带形成的离散元分析[J]. 岩土工程学报,2012,34(12):2162-2169.

    JIANG Mingjing,ZHANG Wangcheng,SUN Yugang,et al. Mechanical behavior and shear band formation in idealized cemented sands by DEM[J]. Chinese Journal of Geotechnical Engineering,2012,34(12):2162-2169.
    [20]
    蒋明镜,周雅萍,陈贺. 不同胶结厚度下粒间胶结力学特性的试验研究[J]. 岩土力学,2013,34(5):1264-1273.

    JIANG Mingjing,ZHOU Yaping,CHEN He. Experimental study of mechanical behaviors of bonded granules under different bond thicknesses[J]. Rock and Soil Mechanics, 2013, 34(5):1264-1273.
    [21]
    高凌霞,杨向军. 西安地区黄土湿陷性的影响因素[J]. 大连民族学院学报,2003,5(1):66-69.

    GAO Lingxia,YANG Xiangjun. Factors affecting the loess collapsibility in Xi'an[J]. Journal of Dalian Nationalities University,2003,5(1):66-69.
    [22]
    赵景波,陈云. 黄土的孔隙与湿陷性研究[J]. 工程地质学报, 1994,2(2):76-83.

    ZHAO Jingbo,CHEN Yun. Study on pores and collapsibility of loess[J]. Journal of Engineering Geology,1994,2(2):76-83.
    [23]
    党进谦,李靖. 非饱和黄土的结构强度与抗剪强度[J]. 水利学报,2001,29(7):79-83.

    DANG Jinqian,LI Jing. The structural strength and shear strength of unsaturated loess[J]. Journal of Hydraulic Engineering,2001,29(7):79-83.
    • Related Articles

  • Related Articles

    [1]JIANG Mingwei, LIANG Yuntao, FENG Wenbin, LI Haitao, ZHOU Rui, GUO Baolong, LIU Yang, MA Ju. Evolutionary characteristics of microcracks in rocks under weak dynamic disturbance and disaster prevention and control[J]. COAL GEOLOGY & EXPLORATION, 2024, 52(10): 166-176. DOI: 10.12363/issn.1001-1986.24.04.0277
    [2]ZHANG Jiafan, CHENG Shufan, WANG Huan, GAO Zhuang, ZHOU Feiwen, ZHOU Hongwen. Experiment of mesostructure and hydrologic characteristics of weakly cemented soft rocks in western China[J]. COAL GEOLOGY & EXPLORATION, 2020, 48(3): 116-121. DOI: 10.3969/j.issn.1001-1986.2020.03.017
    [3]ZHANG Hui, WU Jing, YUAN Liying, SONG Xiaozhong, LIN Bowei. Analysis on the development characteristics and influencing factors of gas pores in coal[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(1): 78-85,91. DOI: 10.3969/j.issn.1001-1986.2019.01.011
    [4]CHEN Da, XUE Xicheng, WEI Jiangbo. Simulation of failure process of Liujian landslide based on PFC2D[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(4): 115-121. DOI: 10.3969/j.issn.1001-1986.2018.04.019
    [5]ZHANG Hui, JIN Xianglan, WU Jing, YANG Qinglong, HAO Linshan. Nano-pores of organic matter in Longmaxi Formation shale in Sichuan basin[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(3): 47-53. DOI: 10.3969/j.issn.1001-1986.2018.03.009
    [6]ZHANG Hui, WU Jing, JIN Xianglan, LI Guihong. The genetic type and its geological indication significance of shale minerals in Niutitang Formation[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(2): 61-67. DOI: 10.3969/j.issn.1001-1986.2018.02.010
    [7]ZHAO Zhou, WEI Jiangbo. Simulation on the movement process of accumulated layer landslide based on PFC2D[J]. COAL GEOLOGY & EXPLORATION, 2017, 45(6): 111-116,122. DOI: 10.3969/j.issn.1001-1986.2017.06.018
    [8]ZHEN Zhi-zhong, WANG Jin-guo, SHI Xian-xin. Ground penetrating radar data imaging via the 2D finite-diffrence migration method[J]. COAL GEOLOGY & EXPLORATION, 2007, 35(6): 57-60.
    [9]CHAI Shou-xi, HAN Wen-feng, WANG Pei, WEI Hou-zhen. Experiment on artificially-prepared clay samples by freeze-drying for SEM[J]. COAL GEOLOGY & EXPLORATION, 2005, 33(2): 46-48.
    [10]Gao Junliang. PROPERTY ANALYSIS OF RECENTLY SEDIMENTED SILTY CLAY IN XINGTAI REGION[J]. COAL GEOLOGY & EXPLORATION, 1997, 25(2): 40-42.

Catalog

    Get Citation
    PDF
    XML

    Article Metrics

    Article views (91) PDF downloads (10) Cited by()
    Related

    Copyright of website design © Editorial Office of Coal Geology & Exploration 陕ICP备05001372号-6 陕公网安备 61019002002193号

    Address: Editorial Office of Coal Geology & Exploration, No.82 Jinye 1st Rd, High-Tech Zone, Xi'an City, Shaanxi, China

    Tel: 029-81778075 E-mail: ccrimtdzykt@vip.163.com

    Supported by: Beijing Renhe Information Technology Co., Ltd.  Baidu Analytics

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return