频发微震下上覆软弱岩体边坡动力稳定及失稳模式

杨忠平; 来云亮; 刘树林; 田鑫; 胡元鑫; 任书霈

doi:10.11779/CJGE201912015

频发微震下上覆软弱岩体边坡动力稳定及失稳模式 English Version

杨忠平^1,2,3, ,,
来云亮^1,2,3,
刘树林^1,2,3,
田鑫^1,2,3,
胡元鑫⁴,
任书霈^1,2,3

1. 重庆大学山地城镇建设与新技术教育部重点实验室,重庆 400045;
2. 重庆大学土木工程学院,重庆 400045;
3. 重庆大学库区环境地质灾害防治国家地方联合工程研究中心,重庆 400045;
4. 渝武机场建设指挥部,重庆 401120

基金项目: 国家自然科学基金项目（41772306）; 国家重点研发计划项目（2018YFC1504802）; 中央高校基本科研业务费项目（2019CDXYTM0032）

详细信息

作者简介:
杨忠平(1981— ),男,副教授,博士生导师,主要从事环境岩土与边坡稳定性方面的教学与研究工作。E-mail：yang-zhp@163.com。

通讯作者:
杨忠平，E-mail：yang-zhp@163.com

中图分类号: TU431
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出版历程
- 收稿日期: 2019-04-01
- 发布日期: 2019-12-24

Dynamic stability and failure mode of slopes with overlying weak rock mass under frequent micro-seismic actions

YANG Zhong-ping^1,2,3, ,,
LAI Yun-liang^1,2,3,
LIU Shu-lin^1,2,3,
TIAN Xin^1,2,3,
HU Yuan-xin⁴,
REN Shu-pei^1,2,3

1. Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education, Chongqing University, Chongqing 400045, China;
2. School of Civil Engineering, Chongqing University, Chongqing 400045, China;
3. National Joint Engineering Research Center for Prevention and Control of Environmental Geological Hazards in the TGR Area, Chongqing University, Chongqing 400045, China;
4. Headquarters of Chongqing Yuwu Airport, Chongqing 401120, China

摘要

摘要: 水库蓄水诱发的高频次微小地震对库岸边坡稳定性存在一定影响。采用振动台物理模型试验,结合UDEC离散元分析方法,以三峡库区杉树槽滑坡为原型,研究了频发微震作用下典型上覆软弱岩体边坡的累计损伤过程、动力响应特征及破坏模式。结果表明：在频发微震作用下,模型边坡自振频率不断降低,阻尼比不断升高,完整性降低;坡体加速度响应在初始阶段和微震阶段体现出“高程效应”和“趋表效应”,而在小震加载后,坡体动力响应与上述特征出现偏离;在反复微震下,坡体的破坏演化过程可概括为“次级节理发育→次级节理扩展→上部岩体破碎→后缘裂隙扩张→滑面贯通→边坡失稳破坏”阶段;离散元数值分析结果表明,上覆软弱岩体边坡在频发微震下的变形主要发生于岩层分界面以上,后缘裂隙以下的上部岩体,随着地震次数的增加,其永久位移不断增大,边坡稳定性系数不断降低,边坡破坏特征与振动台试验结果相吻合。
- 频发微震 /
- 上覆软弱岩体边坡 /
- 振动台试验 /
- UDEC离散元方法 /
- 动力稳定性 /
- 破坏模式
Abstract: The micro earthquakes with high frequency induced by reservoir filling may exert an influence on the stability of bank slopes. Based on Shanshucao landslide in the Three Gorge Reservoir area,the shaking table tests and the discrete element method (UDEC) are used to analyze the dynamic response, cumulative damage process and failure modes of a typical slope with overlying weak rock mass under frequent micro-seismic actions. The results are as follows: under the actions of frequent micro-seism, the natural frequency of vibration of the model slope reduced gradually, whereas its damping ratio continues to raise, which shows the decrease of rock integrity. During the initial stage and the micro-seismic action stage, the acceleration response of the slope is characterized by“elevation effect”and“aspect effect”, while the results begin to deviate as the small seism is louded. The failure evolution process of the model slope can be summarized as “development of the secondary joints→extension of the secondary joints→breaking of the upper rock mass→expansion of the rear crack→formation of the slip plane→failure of the slope”. The discrete element numerical results show that the deformation of the slope with overlying weak rock mass under frequent micro-seismic actions mainly occurs in the upper rock mass, which is above the rock interface and below the rear crack. With the increasing number of earthquakes, the permanent deformation of the slope continues to enlarge, and its stability coefficient decreases simultaneously, which is accordant with the results of the shaking table tests.
- micro-seismic action /
- slope with overlying weak rock mass /
- shaking table test /
- UDEC numerical simulation /
- dynamic stability /
- failure mode

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参考文献(23)

[1]	陈德基, 汪雍熙, 曾新平. 三峡工程水库诱发地震问题研究[J]. 岩石力学与工程学报, 2008, 27(8): 1513-1524. (CHEN De-ji, WANG Yong-xi, ZENG Xin-ping.A study of reservoir-induced earthquake of three gorges project[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(8): 1513-1524. (in Chinese))
[2]	郑守仁. 三峡工程水库大坝安全及长期运用研究与监测检验分析[J]. 长江技术经济, 2018, 2(3): 1-9. (ZHEN Shou-ren.Study on the safety and long-term application of the three gorges project reservoir dam and its monitoring inspection and analysis[J]. Technology and Economy of Yangtze River, 2018, 2(3): 1-9. (in Chinese))
[3]	孟庆筱, 冯光钰, 梅启双, 等. 三峡库首区非构造型水库地震的烈度衰减[J]. 西北地震学报, 2011, 33(增刊1): 434-437. (MENG Qing-xiao, FENG Guang-yu, MEI Qi-shuang, et al.Intensity attenuation of non-tectonic reservoir earthquake in the head region of three gorge reservoir[J]. Northwestern Seismological Journal, 2011, 33(S1): 434-437. (in Chinese))
[4]	殷跃平. 三峡库区边坡结构及失稳模式研究[J]. 工程地质学报, 2005, 13(2): 145-154. (YIN Yue-ping.Human-cutting slope structure and failure pattern at the three gorges reservoir[J]. Journal of Engineering Geology, 2005, 13(2): 145-154. (in Chinese))
[5]	LI An-jui, QIAN Zhi-guang, JIANG Jing-cai, et al.Seismic slope stability evaluation considering rock mass disturbance varying in the slope[J]. Ksce Journal Of Civil Engineering, 2019, 23(3): 1043-1054.
[6]	LIU Chuan-zheng, WANG Gang, HAN Wei.Effect of slip surface's continuity on slope dynamic stability based on infinite slope model[J]. Mathematics Mathematics, 2019, 7(1): 1-20.
[7]	SONG Dan-qing, CHE Ai-lan, ZHU Ren-jie, et al.Dynamic response characteristics of a rock slope with discontinuous joints under the combined action of earthquakes and rapid water drawdown[J]. Landslides, 2018, 15(6): 1109-1125.
[8]	BROOJERDI M S, BEHNIA M, AGHCHAI M H.Dynamic analysis of rock slopes using the distinct element method: a case study at the right abutment of the upper gotvand dam, iran[J]. Journal of African Earth Sciences, 2018(145): 53-67.
[9]	UKRITCHON B, KEAWSAWASVONG S.Discussion on "seismic displacement along a log-spiral failure surface with crack using rock hoek-brown failure criterion"[J]. Soil Dynamics And Earthquake Engineering, 2018(110): 141-144.
[10]	GANJEH R S, MEMARIAN H, KHOSRAVI M, et al.A comparison between effects of earthquake and blasting on stability of mine slopes: a case study of chadormalu open-pit mine[J]. Journal of Mining and Environment, 2019, 10(1): 223-240.
[11]	刘树林, 杨忠平, 刘新荣, 等. 频发微小地震作用下顺层岩质边坡的振动台模型试验与数值分析[J]. 岩石力学与工程学报, 2018, 37(10): 2264-2276. (LIU Shu-lin, YANG Zhong-ping, LIU Xin-rong, et al.Shaking table model test and numerical analysis of the bedding rock slopes under frequent micro-seismic actions[J]. Chinese Journal of Rock Mechanics and Engineering, 2018, 37(10): 2264-2276. (in Chinese))
[12]	杨忠平, 刘树林, 刘永权, 等. 反复微震作用下顺层及反倾岩质边坡的动力稳定性分析[J]. 岩土工程学报, 2018, 40(7): 1277-1286. (YANG Zhong-ping, LIU Shu-lin, LIU Yong-quan, et al.Dynamic stability analysis of bedding and toppling rock slopes under repeated micro-seismic action[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(7): 1277-1286. (in Chinese))
[13]	刘新荣, 何春梅, 刘树林, 等. 高频次微小地震下顺倾软硬互层边坡动力稳定性研究[J]. 岩土工程学报, 2019, 41(3): 430-438. (LIU Xin-rong, HE Chun-mei, LIU Shu-lin, et al.Study on dynamic stability of the slopes with interbeddings of soft and hard layers under high frequency minor earthquakes[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(3): 430-438. (in Chinese))
[14]	王鸣, 易武. 三峡库区杉树槽滑坡地质特征与成因机制分析[J]. 三峡大学学报(自然科学版), 2015, 37(5): 44-47. (WANG Ming, YI Wu.Geological characteristics and formation mechanism of Shanshucao landslide in three gorges reservoir area[J]. Journal of China Three Gorges University (Natural Sciences), 2015, 37(5): 44-47. (in Chinese))
[15]	喻章. 杉树槽滑坡滑带土强度衰减特性及失稳机理研究[D]. 武汉: 中国地质大学, 2018. (YU Zhang.Study on strength attenuation characteristics of slip soil and failure mechanism of Shanshucao landslide[D]. Wuhan: China University of Geosciences, 2018. (in Chinese))
[16]	易武, 黄鹏程. 湖北省杉树槽滑坡成因机制分析[J]. 重庆交通大学学报(自然科学版), 2016, 35(3): 89-93. (YI Wu, HUANG Peng-cheng.Formation mechanism of Shashucao landslide in Hubei province[J]. Journal of Chongqing Jiaotong University (Natural Science), 2016, 35(3): 89-93. (in Chinese))
[17]	徐楚, 胡新丽, 何春灿, 等. 水库型滑坡模型试验相似材料的研制及应用[J]. 岩土力学, 2018, 39(11): 4287-4293. (XU Chu, HU Xin-li, HE Chun-can, et al.Development and application of similar material for reservoir landslide model test[J]. Rock and Soil Mechanics, 2018, 39(11): 4287-4293. (in Chinese))
[18]	钱海涛, 肖锐铧. 基于振动台实验的典型滑坡单元体震动滑移特征发现[J]. 水文地质工程地质, 2018, 45(2): 64-69. (QIAN Hai-tao, XIAO Rui-hua.New results of the slid characteristics of a typical earthquake landslide model based on shake table tests[J]. Hydrogeology ＆ Engineering Geology, 2018, 45(2): 64-69. (in Chinese))
[19]	曹礼聪, 周羽哲, 马东华, 等. 含倾斜夹层场地动力响应分析的大型振动台试验研究[J]. 西南交通大学学报, 2019, 54(5): 953-961. (CAO Li-cong, ZHOU Yu-zhe, MA Dong-hua, et al.Large shaking table test on the seismic response of the site with tilted interlayer[J]. Journal of Southwest Jiaotong University, 2019, 54(5): 953-961. (in Chinese))
[20]	刘永权. 频发微震下库区顺层岩质边坡累积损伤演化机理及稳定性研究[D]. 重庆: 重庆大学, 2017. (LIU Yong-quan.Study on cumulative damage evolution mechanism and stability of bedding rock slope in reservoir area under frequent microseismic[D]. Chongqing: Chongqing University, 2017. (in Chinese))
[21]	陆伟东. 基于matlab的地震模拟振动台试验的数据处理[J]. 南京工业大学学报(自然科学版), 2011, 33(6): 1-4. (LU Wei-dong.Matlab-based data processing of shaking table test[J]. Journal of Nanjing University of Technology (Natural Science Edition), 2011, 33(6): 1-4. (in Chinese))
[22]	崔江余, 杜修力. 河谷自由场地震动经验传递函数研究[J]. 水利学报, 2001, 32(10): 58-61. (CUI Jiang-yu, DU XIu-li.Study on empirical transfer function of gorge free field ground motion[J]. Journal of Hydraulic Engineering, 2001, 32(10): 58-61. (in Chinese))
[23]	范亚伦, 张伟宾, 周志军, 等. 含不连续面岩质边坡动力响应研究[J]. 铁道科学与工程学报, 2017, 14(6): 1184-1191. (FAN Ya-lun, ZHANG Wei-bin, ZHOU Zhi-jun, et al.Research on dynamic response of rock slopes with discontinuous joints[J]. Journal of Railway Science and Engineering, 2017, 14(6): 1184-1191. (in Chinese))

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