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川藏铁路某特大桥成都侧岸坡工程地质特征及稳定性评价

周洪福 冯治国 石胜伟 王保弟 徐如阁 冉涛

周洪福, 冯治国, 石胜伟, 王保弟, 徐如阁, 冉涛. 川藏铁路某特大桥成都侧岸坡工程地质特征及稳定性评价[J]. 水文地质工程地质, 2021, 48(5): 112-119. doi: 10.16030/j.cnki.issn.1000-3665.202103076
引用本文: 周洪福, 冯治国, 石胜伟, 王保弟, 徐如阁, 冉涛. 川藏铁路某特大桥成都侧岸坡工程地质特征及稳定性评价[J]. 水文地质工程地质, 2021, 48(5): 112-119. doi: 10.16030/j.cnki.issn.1000-3665.202103076
ZHOU Hongfu, FENG Zhiguo, SHI Shengwei, WANG Baodi, XU Ruge, RAN tao. Slope engineering geology characteristics and stability evaluation of a grand bridge to Chengdu bank on the Sichuan-Tibet Railway[J]. Hydrogeology & Engineering Geology, 2021, 48(5): 112-119. doi: 10.16030/j.cnki.issn.1000-3665.202103076
Citation: ZHOU Hongfu, FENG Zhiguo, SHI Shengwei, WANG Baodi, XU Ruge, RAN tao. Slope engineering geology characteristics and stability evaluation of a grand bridge to Chengdu bank on the Sichuan-Tibet Railway[J]. Hydrogeology & Engineering Geology, 2021, 48(5): 112-119. doi: 10.16030/j.cnki.issn.1000-3665.202103076

川藏铁路某特大桥成都侧岸坡工程地质特征及稳定性评价

doi: 10.16030/j.cnki.issn.1000-3665.202103076
基金项目: 中国地质调查局地质调查项目(DD20211379;DD20160272);四川省重点研发项目(2020YFS0296);第二次青藏高原综合科学考察研究资助(Grant No.2019QZKK0904)
详细信息
    作者简介:

    周洪福(1980-),男,博士,教高,硕士研究生导师,主要从事工程地质与地质灾害调查研究工作。E-mail:zhf800726@163.com

  • 中图分类号: P642.2

Slope engineering geology characteristics and stability evaluation of a grand bridge to Chengdu bank on the Sichuan-Tibet Railway

  • 摘要: 拟建的川藏铁路某特大桥是一座重要的控制性桥梁,其桥址区的地质安全风险评价具有重要的工程意义。该特大桥成都侧岸坡三面临空,海拔高差大,岩性复杂多变,岩体结构和完整性差,风化卸荷强烈,浅表部危岩体发育,调查表明成都岸八曲侧斜坡曾发生较大规模顺层岩质崩滑。采用遥感解译、剖面测量及稳定性计算等技术方法,调查成都侧岸坡地形地貌、地层岩性、结构面发育及变形破坏等特征,分析评价特大桥成都岸八曲侧顺层岩质斜坡稳定性。结果表明:天然和暴雨工况下,斜坡稳定系数大于1.1;强震(PGA>0.3 g)工况下,斜坡稳定系数小于1.0,可能出现局部或整体失稳破坏。建议在清除斜坡表部危岩体的基础上,进一步深入研究八曲侧顺层岩质斜坡未来可能出现的变形破坏范围和程度,提出针对性工程防治措施建议。
  • 图  1  某拟建特大桥两岸高陡斜坡地形地貌(镜向SE130°)

    Figure  1.  Topography of high and steep slopes on both sides of the grand bridge (photograph direction: SE130°)

    图  2  成都侧岸坡分区图

    Figure  2.  Zoning characteristic of bank slope to Chengdu

    图  3  成都侧岸坡特征以及桥梁主墩和隧道口位置(镜向NE50°)

    Figure  3.  Characteristics of bank slope to Chengdu and location of the main bridge pier and entrance of tunnel (photograph direction: NE50°)

    图  4  成都侧岸坡工程地质剖面图

    Figure  4.  Engineering geological profile of bank slope to Chengdu

    图  5  成都侧岸坡岩体裂隙极点图(上半球投影)

    Figure  5.  Discontinuities dominant orientation of bank slope to Chengdu(upper projection)

    图  6  成都侧岸坡变形破坏特征

    (a)斜坡顶部发育2处较大规模潜在危岩体;(b)坠落式破坏的危岩体;(c)倾倒式破坏的危岩体

    Figure  6.  Deformation and failure characteristics of bank slope to Chengdu

    图  7  成都侧八曲顺层斜坡工程地质剖面图

    Figure  7.  Engineering geological profile of bedding slope of the Baqu river

    图  8  地震工况(PGA=0.3 g)八曲侧斜坡位移矢量及云图

    Figure  8.  Displacement vector of the Baqu slope(PGA=0.3 g

    图  9  八曲侧斜坡稳定性分析计算模型

    Figure  9.  Model of rigid body limit equilibrium of the Baqu slope

    图  10  滑面1和滑面2不同工况稳定性计算结果对比分析

    Figure  10.  Stability calculation results of sliding surface 1 and sliding surface 2 under different conditions

    表  1  八曲侧斜坡稳定性计算参数表

    Table  1.   Calculation parameters of slope stability

    名称γ天然/
    (g·cm−3
    γ饱和/
    (g.cm−3
    c天然/
    MPa
    c饱和/
    MPa
    φ天然/
    (°)
    φ饱和/
    (°)
    堆积体2.02.200.080.054036
    强风化岩体2.52.550.600.53634
    弱风化岩体2.62.651.501.404035
    微风化岩体2.62.652.001.904745
    强风化岩体中的
    顺层片理面
    0.120.0953326.3
    弱风化岩体中的
    顺层片理面
    0.300.2703533.0
      注:γ—密度;c—黏聚力;φ—内摩擦角。
    下载: 导出CSV

    表  2  八曲侧斜坡稳定系数计算结果

    Table  2.   FOS calculation results of stability of the Baqu slope

    计算方法工况一般条分法Bishop法Janbu法Spencer法Morgenstern法
    滑面1滑面2滑面1滑面2滑面1滑面2滑面1滑面2滑面1滑面2
    天然1.451.541.461.601.441.571.451.571.451.56
    暴雨1.151.251.151.291.131.221.151.281.141.27
    地震(PGA=0.1 g1.261.311.281.361.241.321.251.331.251.33
    地震(PGA=0.15 g1.181.211.211.261.151.221.231.171.23
    地震(PGA=0.2 g1.111.121.131.171.071.131.151.14
    地震(PGA=0.3 g0.980.971.001.010.930.970.990.99
    暴雨+地震(PGA=0.1 g1.001.061.001.090.971.031.090.991.08
    暴雨+地震(PGA=0.15 g0.940.980.951.010.900.981.010.931.00
    暴雨+地震(PGA=0.2 g0.880.910.890.940.840.900.940.870.94
    暴雨+地震(PGA=0.3 g0.780.780.790.810.730.770.820.81
    下载: 导出CSV
  • [1] 张培震, 郑德文, 尹功明, 等. 有关青藏高原东北缘晚新生代扩展与隆升的讨论[J]. 第四纪研究,2006,26(1):5 − 13. [ZHANG Peizhen, ZHENG Dewen, YIN Gongming, et al. Discussion on late Cenozoic growth and rise of northeastern margin of the Tibetan Plateau[J]. Quaternary Sciences,2006,26(1):5 − 13. (in Chinese with English abstract) doi:  10.3321/j.issn:1001-7410.2006.01.002
    [2] 彭建兵, 崔鹏, 庄建琦. 川藏铁路对工程地质提出的挑战[J]. 岩石力学与工程学报,2020,39(12):2377 − 2389. [PENG Jianbing, CUI Peng, ZHUANG Jianqi. Challenges to engineering geology of Sichuan-Tibet Railway[J]. Chinese Journal of Rock Mechanics and Engineering,2020,39(12):2377 − 2389. (in Chinese with English abstract)
    [3] 邱鹏, 苏培东, 郭长宝, 等. 川藏铁路规划区K208滑坡数值模拟分析[J]. 水力发电,2016,42(11):42 − 46. [QIU Peng, SU Peidong, GUO Changbao, et al. Numerical analysis of K208 landslide in planning area of Sichuan-Tibet Railway[J]. Water Power,2016,42(11):42 − 46. (in Chinese with English abstract) doi:  10.3969/j.issn.0559-9342.2016.11.011
    [4] 吴瑞安, 郭长宝, 杜宇本, 等. 川藏铁路加查-朗县段地质灾害发育特征研究[J]. 现代地质,2017,31(5):956 − 964. [WU Rui'an, GUO Changbao, DU Yuben, et al. Research on geohazard developing characteristics in Jiacha to Langxian section of Sichuan-Tibet Railway[J]. Geoscience,2017,31(5):956 − 964. (in Chinese with English abstract) doi:  10.3969/j.issn.1000-8527.2017.05.007
    [5] 王家柱, 高延超, 冉涛, 等. 川藏铁路交通廊道某大型古滑坡成因及失稳模式分析[J]. 现代地质,2021,35(1):18 − 25. [WANG Jiazhu, GAO Yanchao, RAN Tao, et al. Analysis of genetic mechanism and failure mode of a large paleo-landslide in Sichuan-Tibet Railway transportation corridor[J]. Geoscience,2021,35(1):18 − 25. (in Chinese with English abstract)
    [6] 宋章, 张广泽, 蒋良文, 等. 川藏铁路高陡边坡深厚卸荷带特征分析[C]//川藏铁路建设的挑战与对策——2016 学术交流会论文集. 北京: 人民交通出版社股份有限公司, 2017: 177−184.

    SONG Zhang, ZHANG Guangze, JIANG Liangwen, et al. Analyzed the characteristic of deep unloading fracture zone of high and steep slope of the Sichuan-Tibet Railway[C]//Proceedings of the 2016 Academic Exchange Conference on Challenges and Countermeasures of Sichuan-Tibet Railway Construction. Beijing: China Communication Press Co Ltd, 2017: 177−184. (in Chinese with English abstract)
    [7] 蓝康文. 川藏铁路高山峡谷边坡卸荷带变形破坏模式及稳定性研究[D]. 成都: 西南交通大学, 2015.

    LAN Kangwen. Study on failure modes and stability of unloading zone of slopes in alpine-gorge region along Sichuan-Tibet Railway[D]. Chengdu: Southwest Jiaotong University, 2015. (in Chinese with English abstract)
    [8] 王俊, 赵建军, 瞿生军, 等. 卸荷条件下高边坡大规模开挖的“地质-力学”响应研究—以西藏如美水电站右坝肩为例[J]. 水文地质工程地质,2018,45(4):37 − 44. [WANG Jun, ZHAO Jianjun, QU Shengjun, et al. A study of the geological-mechanical response during large-scale excavation of high slope under unloading condition: Exemplified by the right abutment of the Tibet Rumei Hydropower Station[J]. Hydrogeology & Engineering Geology,2018,45(4):37 − 44. (in Chinese with English abstract)
    [9] 周洪福, 冉涛, 陈波, 等. 川西顺层斜坡破坏模式及层间弱面连通率对斜坡稳定性的影响[J]. 现代地质,2021,35(1):137 − 144. [ZHOU Hongfu, RAN Tao, CHEN Bo, et al. Failure modes and influence of interlaminar fracture zone connectivity on slope stability of bedding rock slope in Ya'an, west Sichuan[J]. Geoscience,2021,35(1):137 − 144. (in Chinese with English abstract)
    [10] 马文著, 徐衍, 李晓雷, 等. 基于黏聚力裂缝模型的反倾层状岩质边坡倾倒破坏模拟[J]. 水文地质工程地质,2020,47(5):150 − 160. [MA Wenzhu, XU Yan, LI Xiaolei, et al. A numerical study of the toppling failure of an anti-dip layered rock slope based on a cohesive crack model[J]. Hydrogeology & Engineering Geology,2020,47(5):150 − 160. (in Chinese with English abstract)
    [11] 周洪福, 符文熹, 叶飞, 等. 陡倾坡外弱面控制的斜坡滑移-剪损变形破坏模式[J]. 地球科学,2021,46(4):1437 − 1446. [ZHOU Hongfu, FU Wenxi, YE Fei, et al. Study on sliding- shearing deformation and failure mode of rock slope with steep weak structural plane[J]. Earth Science,2021,46(4):1437 − 1446. (in Chinese with English abstract)
    [12] 冉涛, 周洪福, 徐伟, 等. 川西交通廊道雅安-泸定段典型岩质边坡失稳模式、破坏机理及防治措施[J]. 自然灾害学报,2020,29(4):200 − 212. [RAN Tao, ZHOU Hongfu, XU Wei, et al. Research on the instability modes, failure mechanisms, and preventive measures of representative rock slopes within Ya’an- Luding section of the western Sichuan transportation corridor[J]. Journal of Natural Disasters,2020,29(4):200 − 212. (in Chinese with English abstract)
    [13] 成永刚, 赵晓彦. 川藏高速公路雅(安) 康(定) 段玄武岩边坡工程地质分析与防治[J]. 水利与建筑工程学报,2020,18(5):165 − 169. [CHENG Yonggang, ZHAO Xiaoyan. Engineering geological analysis and prevention of basalt slope in Sichuan Tibet expressway[J]. Journal of Water Resources and Architectural Engineering,2020,18(5):165 − 169. (in Chinese with English abstract) doi:  10.3969/j.issn.1672-1144.2020.05.029
    [14] 杨志法, 张路青, 祝介旺. 四项边坡加固新技术[J]. 岩石力学与工程学报,2005,24(21):3828 − 3834. [YANG Zhifa, ZHANG Luqing, ZHU Jiewang. Four new techniques in slope reinforcement[J]. Chinese Journal of Rock Mechanics and Engineering,2005,24(21):3828 − 3834. (in Chinese with English abstract) doi:  10.3321/j.issn:1000-6915.2005.21.004
    [15] 龚建辉. 高陡不稳定路堑边坡加固技术探讨[J]. 高速铁路技术,2020,11(3):71 − 74. [GONG Jianhui. Discussion on reinforcement technology of high and steep unstable cutting slope[J]. High Speed Railway Technology,2020,11(3):71 − 74. (in Chinese with English abstract)
    [16] 王栋, 张广泽, 李新坡, 等. 川藏铁路折多山隧道进口岩崩运动特征及防治措施[J]. 科学技术与工程,2017,17(34):118 − 123. [WANG Dong, ZHANG Guangze, LI Xinpo, et al. Movement characteristics and prevention of talus slope in Zheduoshan tunnel of Sichuan-Tibet Railway[J]. Science Technology and Engineering,2017,17(34):118 − 123. (in Chinese with English abstract) doi:  10.3969/j.issn.1671-1815.2017.34.019
    [17] 钟卫, 李秀珍, 崔云, 等. 崩塌滑坡灾害对川藏铁路康定-昌都段选线的影响[J]. 铁道标准设计,2018,62(1):34 − 38. [ZHONG Wei, LI Xiuzhen, CUI Yun, et al. The influence of landslide and collapse hazards on railway alignment in Kangding-Changdu section of Sichuan-Tibet Railway[J]. Railway Standard Design,2018,62(1):34 − 38. (in Chinese with English abstract)
    [18] 赵晓彦, 肖典, 罗改, 等. 强降雨条件下碎裂岩质边坡锚墩式主动网加固机理模型试验[J]. 工程地质学报,2021,29(2):365 − 374. [ZHAO Xiaoyan, XIAO Dian, LUO Gai, et al. Model testing of anchored active net for cataclastic rock slope stabilizing under heavy rainfall[J]. Journal of Engineering Geology,2021,29(2):365 − 374. (in Chinese with English abstract)
    [19] 王鹏. 川藏铁路金沙江特大桥岸坡稳定性研究[D]. 成都: 西南交通大学, 2016.

    WANG Peng. Study on the slope stability of bridge over Jinsha river in Sichuan-Tibet Railway[D]. Chengdu: Southwest Jiaotong University, 2016. (in Chinese with English abstract)
    [20] 杜杰贵, 严松, 李继兴, 等. 考虑卸荷带和岩体软化特性的某桥址边坡稳定性研究[J]. 水利与建筑工程学报,2021,19(2):12 − 18. [DU Jiegui, YAN Song, LI Jixing, et al. Slope stability analysis of a bridge site considering unloading zone and rock softening characteristics[J]. Journal of Water Resources and Architectural Engineering,2021,19(2):12 − 18. (in Chinese with English abstract)
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  • 收稿日期:  2021-03-14
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  • 网络出版日期:  2021-09-09
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