西静河水库左库岸失稳边坡稳定性分析
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摘要
西静河水库位于地震频发区,近坝库岸坡陡峻,其左岸边坡是否稳定一直是困扰水库安全运行的主要问题之一。根据西静河水库库区地质勘察资料和坝址区水文地质条件,对西静河水库库岸滑坡带进行了详析,在此基础上采用不平衡推力法对左库岸失稳边坡进行了稳定性分析,结果表明:西静河水库左岸边坡趋于稳定,但在持续暴雨或加载地震力的情况下边坡中段有滑坡风险,该结论得到了现场勘察情况的支持。
Xijinghe Reservoir is located in an active earthquake zone,and the slopes near the dam are steep.Hence,the stability of the slopes has always been one of the problems affecting the reservoir security.Based on the geological survey data and hydrogeological conditions in the Xijinghe Reservoir,the landslide zone in the embankment of the Xijinghe Reservoir was analyzed in detail.The stability analysis of the slopes on the left bank was performed using the imbalance thrust force method.The results showed that the slopes on the left bank of the Xijinghe Reservoir is stable under the natural conditions;however,landslides may occur in the middle part of the slopes under the sustained heavy rains or earthquakes conditions.The conclusions were consistent with the in-situ survey results.
Xijinghe Reservoir is located in an active earthquake zone,and the slopes near the dam are steep.Hence,the stability of the slopes has always been one of the problems affecting the reservoir security.Based on the geological survey data and hydrogeological conditions in the Xijinghe Reservoir,the landslide zone in the embankment of the Xijinghe Reservoir was analyzed in detail.The stability analysis of the slopes on the left bank was performed using the imbalance thrust force method.The results showed that the slopes on the left bank of the Xijinghe Reservoir is stable under the natural conditions;however,landslides may occur in the middle part of the slopes under the sustained heavy rains or earthquakes conditions.The conclusions were consistent with the in-situ survey results.
引文
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[13]文明,叶洪华.考虑条间推力倾角变化对不平衡推力法的修正[J].路基工程,2013(4):107-110.(WEN Ming,YE Honghua.Amendment on unbalanced thrust force method when considering change of inter-slice thrust force inclination[J].Subgrade Engineering,2013(4):107-110.(in Chinese))
[14]陶丽娜,周小平,柴贺军,等.用于边坡稳定分析的改进通用条分法[J].土木建筑与环境工程,2014(1):106-113.(TAO Lina,ZHOU Xiao-ping,CAI He-jun,et al.Improved general limit equilibrium method for slope stability analysis[J].Journal of Chongqing Jianzhu University,2014(1):106-113.(in Chinese))
[15]DZ/T 0218-2006,滑坡防治工程勘查规范[S].(DZ/T 0218-2006,Specification of Geological Investigation for Landslide Stabilization[S].(in Chinese))
[2]殷跃平,胡瑞林.三峡库区巴东组(T2b)紫红色泥岩工程地质特征研究[J].工程地质学报,2004,12(2):124-135.(YIN Yueping,HU Rui-lin.Engineering geological characteristics of purplish-red mudstone of middle tertiary formation at the Three Gorges Reservoir[J].Journal of Engineering Geology,2004,12(2):124-135.(in Chinese))
[3]罗轶,任光明,王志红,等.某水库库岸稳定性的模糊综合评判[J].长江科学院院报,2011,28(6):67-70.(LUO Yi,REN Guang-ming,WANG Zhi-hong,et al.Fuzzy comprehensive evaluation on the stability of reservoir bank[J].Journal of Yangtze River Scientific Research Inititute,2011,28(6):67-70.(in Chinese))
[4]张志敏,张永央,曹东勇,等.某大型水库环境工程地质问题初探[J].中国水运(下半月),2013,13(5):2 04-205,208.(ZHANG Zhi-min,ZHANG Yong-yang,CAO Dong-yong.Initially search of environmental engineering geological problems for a large reservoir[J].China Water Transport,2013,13(5):204-205,208.(in Chinese))
[5]陈太富.水库库区地质灾害评估及防治措施[J].城市建设理论研究(电子版),2012(10).(CHEN Tai-fu.Reservoir geological hazard assessment and prevention measures[J].Chengshi Jianshe Lilun Yanjiu,2012(10).(in Chinese))
[6]胡小平,孙贵尚,王联军,等.三峡水库区地质灾害防治工程环境效益评估[J].中国地质灾害与防治学报,2006,17(1):148-150.(HU Xiao-ping,SUN Gui-shang,WANG Lian-jun,et al.Environmental benefits assessment of geological disaster prevention project for the Three Gorges Reservoir[J].The Chinese Journal of Geological Hazard and Control,2006,17(1):148-150.(in Chinese))
[7]许建聪,尚岳全,郑束宁,等.不平衡推力法的弹塑性有限元改进[J].岩石力学与工程学报,2005,24(23):4247-4252.(XU Jian-cong,SHANG Yue-quan,ZHENG Shu-ning,et al.Elastoplastic finite element improvement of imbalanced thrust force method[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(23):4247-4252.(in Chinese))
[8]张鲁渝,郑颖人,时卫民,等.边坡稳定分析中关于不平衡推力法的讨论[J].岩石力学与工程学报,2005,24(1):177-182.(ZHANG Lu-yu,ZHENG Ying-ren,SHI Wei-min,et al.On slope stability analysis by imbalance thrust force method[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(1):177-182.(in Chinese))
[9]时卫民,郑颖人,唐伯明,等.边坡稳定不平衡推力法的精度分析及其使用条件[J].岩土工程学报,2004(5):313-317.(SHI Wei-min,ZHENG Yin-ren,TANG Bo-ming,et al.Accuracy and application range of imbalance thrust force method for slope stability analysis[J].Chinese Journal of Geotechnical Engineering,2004(5):313-317.(in Chinese))
[10]何正杰,朱寿增,米澄宇,等.不平衡推力法在滑坡治理中的应用研究[J].成都工业学院学报,2013(4):71-73.(HE Zheng-jie,ZHU Shou-zeng,MI Cheng-yu,et al.Application of unbalanced thrust transfer coefficient method in landslide[J].Journal of Chengdu Technological University,2013(4):71-73.(in Chinese))
[11]郑颖人,时卫民,杨明成,等.不平衡推力法与Sarma法的讨论[J].岩石力学与工程学报,2004,23(17):3030-3036.(ZHENG Yin-ren,SHI Wei-min,YANG Ming-cheng.Discussion on imbalance thrust Force method and Sarma′s method[J].Chinese Journal of Geotechnical Engineering,2004,23(17):3030-3036.(in Chinese))
[12]徐志英.岩石力学[M].北京:水利电力出版社,1986:225-252.(XU Zhi-ying.Rock Mechanics[M].Beijing:Water Resources and Electric Power Press,1986,225-252.(in Chinese))
[13]文明,叶洪华.考虑条间推力倾角变化对不平衡推力法的修正[J].路基工程,2013(4):107-110.(WEN Ming,YE Honghua.Amendment on unbalanced thrust force method when considering change of inter-slice thrust force inclination[J].Subgrade Engineering,2013(4):107-110.(in Chinese))
[14]陶丽娜,周小平,柴贺军,等.用于边坡稳定分析的改进通用条分法[J].土木建筑与环境工程,2014(1):106-113.(TAO Lina,ZHOU Xiao-ping,CAI He-jun,et al.Improved general limit equilibrium method for slope stability analysis[J].Journal of Chongqing Jianzhu University,2014(1):106-113.(in Chinese))
[15]DZ/T 0218-2006,滑坡防治工程勘查规范[S].(DZ/T 0218-2006,Specification of Geological Investigation for Landslide Stabilization[S].(in Chinese))
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