[1]邱洪志,崔云,孔纪名.降雨作用下地震损伤斜坡破坏机理研究[J].自然灾害学报,2018,(03):144-152.[doi:10.13577/j.jnd.2018.0317]
 QIU Hongzhi,CUI Yun,KONG Jiming.Study on failure mechanism of earthquake damage slope under rainfall condition[J].,2018,(03):144-152.[doi:10.13577/j.jnd.2018.0317]
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降雨作用下地震损伤斜坡破坏机理研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2018年03期
页码:
144-152
栏目:
出版日期:
2018-06-28

文章信息/Info

Title:
Study on failure mechanism of earthquake damage slope under rainfall condition
作者:
邱洪志1 崔云23 孔纪名23
1. 成都大学 建筑与土木工程学院, 四川 成都 610106;
2. 中国科学院 山地灾害与地表过程重点实验室, 四川 成都 610041;
3. 中国科学院、水利部成都山地灾害与环境研究所, 四川 成都 610041
Author(s):
QIU Hongzhi1 CUI Yun23 KONG Jiming23
1. School of Architecture and Civil Engineering, Chengdu University, Chengdu 610106,China;
2. Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Chengdu 610041, China;
3. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
关键词:
损伤斜坡降雨入渗斜坡破坏机理分析FLAC3D
Keywords:
damage sloperainfall infiltrationfailure of slopemechanismFLAC3D
分类号:
P694;P65;X43
DOI:
10.13577/j.jnd.2018.0317
摘要:
地震导致斜坡岩体产生裂隙,岩体裂隙的存在为不稳定斜坡再次发生灾害提供了条件。降雨渗入到损伤斜坡裂隙中,使斜坡岩体强度降低,进而诱发大规模地质灾害。根据损伤力学理论,考虑岩体损伤与降雨入渗流的作用,基于FLAC3D自定义损伤本构的二次开发,利用C++开发环境建立裂隙岩体的损伤本构模型。结合都江堰三溪村滑坡的成灾特征,运用开发的损伤本构模型,分析降雨入渗过程中斜坡内孔压场的分布规律及其破坏机理。分析结果表明:在降雨初期,斜坡到达完全饱和之前,有效应力变化幅度很大,斜坡内不同岩性岩体交界面位置的孔隙水压力值较大;地形陡峭的浅层岩体最先达到剪切破坏状态,随着降雨入渗时间增加,屈服范围逐渐向斜坡内部扩大,并且在斜坡的后部出现拉伸屈服破坏。降雨入渗强度在降雨前期对斜坡内的有效应力影响较大,当斜坡到达完全饱和之后,对有效应力的影响很小。
Abstract:
An earthquake can result in cracks in the slope rock mass, which provides the condition for the unstable slope failure. The rainfall may infiltrate into the cracks in the damaged slope, which reduces the strength of rock mass and induces large-scale geological hazards. In this paper, according to the damage mechanics theory, a new model of fractured rock mass is established by C++. It considers the effect of rock mass damage and rainfall infiltration, and is based on a second development of the damage constitutive model in FLAC3D software. The developed damage constitutive model is used for analysis of Sanxi village landslide in Dujiangyan. The pore water pressure distribution law and failure mechanism of the damage slope in the process of rainfall infiltration is investigated. The results show that the effective stress changes greatly before the slope reaching full saturation, and the pore water pressure is relatively large in the interfaces of different rock masses in the slope. At the same time, the shallow rock with steep terrain firstly reaches shear failure state. The yield range gradually expands into the slope with the increase of rainfall infiltration time and the tensile yield failure occurs at the back of the slope. What’s more, the rainfall infiltration intensity has a great influence on the effective stress of the slope in the early stage of rainfall, while its effect becomes very small when the slope is completely saturated.

参考文献/References:

[1] 吴永, 何思明, 李新坡, 等. 震后裂缝危岩体的失稳机理与诊断方法[J]. 四川大学学报(工程科学版), 2010, 42(5):185-190. WU Yong, HE Siming, LI Xinpo, et al. Failure mechanism and diagnosis method of dangerous crack rock after earthquake[J]. Journal of Sichuan University:Engineering Science Edition, 2010, 42(5):185-190. (in Chinese)
[2] 陶舒, 薛东剑, 程滔, 等. 汶川地震前后滑坡分布变化规律-以川北山区为例[J]. 自然灾害学报, 2015, 24(1):177-184. TAO Shu, XUE Dongjian, CHENG Tao. Change law of landslide distribution before and after Wenchuan earthquake:a case study of mountainous area in northern Sichuan[J]. Journal of Natural Disasters, 2015, 24(1):177-184. (in Chinese)
[3] 裴来政, 周小军, 方华. 汶川地震震后降雨滑坡的类型、活动特征及发展趋势[J]. 水土保持通报, 2012, 32(5):113-116. PEI Laizheng, ZHOU Xiaojun, FANG Hua. Types, active characteristics and development trend of rainfall-induced landslides after Wenchuan earthquake[J]. Bulletin of Soil and Water Conservation, 2012, 32(5):113-116. (in Chinese)
[4] 徐锡伟, 闻学泽, 叶建青, 等. 汶川MS 8.0地震地表破裂带及其发震构造[J]. 地震地质, 2008, 30(3):597-629. XU Xiwei, WEN Xueze, YE Jianqing. The MS 8.0 Wenchuan earthquake surface ruptures and its seismogenic structure[J]. Seismology and Geology, 2008, 30(3):597-629. (in Chinese)
[5] 周荣军, 黄润秋, 雷建成, 等. 四川汶川8.0级地震地表破裂与震害特点[J]. 岩石力学与工程学报, 2008, 27(11):2173-2183. ZHOU Rongjun, HUANG Runqiu, LEI Jiancheng. Surface rupture and hazard characteristics of Wenchuan earthquake with magnitude 8.0 in Sichuan province[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(12):2585-2592. (in Chinese)
[6] Keefer, D. K. Earthquake-induced landslides and their effect on alluvial fans[J]. Journal of Sedimentary Research, 1999, 69:84-104.
[7] Celebi M. Topographic and geological amplification determined from strong motion and aftershock records of 3 March 1985 Chile earthquake[J]. Bull Seismological Society Am, 1987, 77:1141-1147.
[8] 戚国庆, 黄润秋, 速宝玉, 等. 岩质边坡降雨入渗过程的数值模拟[J]. 岩石力学与工程学报, 2003, 22(4):625-629. QI Guoqing, HUANG Runqiu, SU Baoyu, et al. Numeric simulation on rainfall infiltration on rock slope[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(4):625-629. (in Chinese)
[9] 刘礼领, 殷坤龙. 暴雨滑坡降水入渗机理分析[J]. 岩土力学, 2008, 29(4):1061-1066. LIU Liling, YIN Kunlong. Analysis of rainfall infiltration mechanism of rainstorm landslide[J]. Rock and Soil Mechanics, 2008, 29(4):1061-1066.(in Chinese)
[10] 蒋中明, 熊小虎, 曾铃. 基于FLAC3D平台的边坡非饱和降雨入渗分析[J]. 岩土力学, 2014, 35(3):855-861. JIANG Zhongming, XIONG Xiaohu, ZENG Ling. Unsaturated seepage analysis of slope under rainfall condition based on FLAC3D[J]. Rock and Soil Mechanics, 2014, 35(3):855-861. (in Chinese)
[11] 吴永, 何思明, 罗渝. 震后暴雨型岩质滑坡启动机理[J]. 岩土工程学报, 2011, 33(1):135-139. WU Yong, HE Siming, LUO Yu. Failure mechanism of post-earthquake rock landslide under rainfall[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 33(1):135-139. (in Chinese)
[12] 朱维申, 李术才, 陈卫忠. 节理岩体破坏机制和锚固效应及工程应用[M]. 北京:科学出版社, 2002. ZHU Weishen, LI Shucai, CHEN Weizhong. Fracture Mechanism and Anchoring Effect of Jointed Rock Mass in Engineering[M]. Beijing:Science Press, 2002. (in Chinese).
[13] 郑少河, 姚梅林, 葛修润. 裂隙岩体渗流场与损伤场的耦合分析[J]. 岩石力学与工程学报, 2004, 23(9):1413-1418. ZHENG Shaohe, YAO Meilin, GE Xiurun. Coupling analysis on seepage and damage in fractured rock mass[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(9):1413-1418. (in Chinese)
[14] 朱珍德, 徐卫亚. 裂隙岩体渗流场与损伤场耦合模型研究[J]. 河海大学学报(自然科学版), 2003, 3(12):155-159. ZHU Zhende, XU Weiya. Theoretical study on a coupled seepage damage model for fissured rock masses[J]. Journal of Hohai University (Natural Sciences), 2003, 3(12):155-159. (in Chinese)
[15] 陈惠发, A.F.萨里普.弹塑与塑性力学[M]. 北京:中国建筑工业出版社, 2003. W.F.Chen, A.F.Saripu. Elasticity and Plasticity[M]. Beijing:China Architecture & Building Press, 2003. (in Chinese)
[16] 杨延毅, 周维垣. 裂隙岩体的渗流-损伤耦合分析模型及其工程应用[J]. 水利学报, 1991(5):19-27. YANG Yanyi, ZHOU Weiyuan. A coupled seepage-damage analysis model for jointed rock masses and its application to rock engineering[J]. Journal of Hydraulic Engineering, 1991(5):19-27. (in Chinese)
[17] Itasca Consulting Group Inc. FLAC3D users’ manual[R]. Minneapolis:Itasca Consulting Group Inc, 2005.
[18] 孔祥言. 高等渗流力学(第二版)[M]. 合肥:中国科学技术大学出版社, 2010. KONG Xiangyan. Higher Fluid Mechanics (second edition)[M]. Hefei:University of Science and Technology of China Press, 2010. (in Chinese)
[19] 汤有光, 郭轶锋, 吴宏伟, 等. 考虑地表径流与地下渗流耦合的斜坡降雨入渗研究[J]. 岩土力学, 2004, 25(9):1347-1352. TANG Yeoukoung, KWOK Yihfeng, NG WANG WAI CHARLES, et al. A preliminary study of rainfall infiltration on slope using a new coupled surface and subsurface flow model[J]. Rock and Soil Mechanics, 2004, 25(9):1347-1352. (in Chinese)
[20] 温铭生, 方志伟, 王阳谷. 都江堰市五里坡特大滑坡灾害特征与致灾成因[J]. 现代地质, 2015, 29(2):448-453. WEN Mingsheng, FANG Zhiwei, WANG Yanggu. Characteristics and disaster causes of Wulipo landslide in Dujiangyan city[J]. Geoscience, 2015, 29(2):448-453. (in Chinese)

备注/Memo

备注/Memo:
收稿日期:2017-10-31;改回日期:2018-03-15。
基金项目:国家自然科学基金项目(41401608);成都大学青年基金项目(2080517054)
作者简介:邱洪志(1986-),男,讲师,博士,主要从事地质灾害研究.E-mail:hnqhz@126.com
通讯作者:崔云(1982-),男,工程师,博士,主要从事山地灾害链机理研究.E-mail:cuiyun82816@126.com
更新日期/Last Update: 1900-01-01