Three-dimensional numerical analysis of the Changgeluo landslide-tunnel engineering disaster on Shangri-Lato Lijiang highway
-
摘要: 准确评价滑坡-隧道相互作用及稳定性, 采用合理的病害防治方法, 对保障公路顺利完工具有重要意义。以香丽高速公路昌格洛滑坡为例, 利用现场地质调查、钻探等方法查明了滑坡成因机制以及变形特性, 通过数值模拟研究了昌格洛滑坡在天然、降雨和开挖等工况下的空间应力应变特征以及稳定性变化, 研究了隧道与所穿越滑坡之间的相互作用, 据此提出了相应的病害防治方案。结果表明: 昌格洛滑坡在自然条件下处于欠稳定状态; 隧道开挖难以引起滑坡整体失稳, 但会诱发滑坡局部变形, 受滑坡体变形影响, 穿越滑体的隧道部分将产生拉伸-剪切变形; 降雨严重恶化滑坡稳定性, 导致滑坡失稳, 进而使穿越其中的隧道失效破坏。原选线方案面临风险巨大, 最优防治方案为线路东移绕避, 使隧道从滑面以下穿过。研究方法和成果可为香丽高速公路类似病害的防治提供有益借鉴。Abstract: Accurately evaluating the interaction and stability of the landslide tunnel and formulating a reasonable disaster prevention plan are of great significance for ensuring the smooth completion of the Shangri-La to Lijiang highway. This paper takes the typical landslide-tunnel disaster site of Shangri-La to Lijiang highway-Changgeluo landslideas an example, uses on-site engineering geological surveys, drilling, and other methods to determine the cause mechanism and deformation characteristics of the landslide, utilizes numerical simulation to study the spatial stress-strain characteristics and stability state of the Changgeluo landslide under natural, rainfall and tunnel excavation conditions, studies the interaction between the landslide and the tunnel, and proposes corresponding disaster prevention and control plans. The results show that the Changgeluo landslide is a giant rock sliding landslide, which is in an unstable state under natural conditions. The tunnel excavation has limited influence on the overall stability of the landslide, but it will cause local deformation of the landslide.Affected by the deformation of the landslide body, the tunnel part of the landslide body will produce tensile-shear deformation failure. Rainfall seriously deteriorates the stability of the landslide, causing the landslide to lose instability and further causing the tunnel to fail and be destroyed. The original route selection plan faces huge risks, and the optimal prevention plan is to move the route eastward to avoid the tunnel so that the tunnel passes under the sliding surface. The research methods and results can provide a useful reference for similar Shangri-La to Lijiang highway disaster sites.
-
图 1 香丽高速公路海拔高差图
Figure 1. Diagram of the altitude difference between Shangri-La and Lijiang highway
图 6 昌格洛隧道出口滑坡体平面图
Figure 6. Plan of the landslide body at the exit of the Changgeluo Tunnel
图 8 天然工况下滑坡最大剪应力云图
Figure 8. Cloud diagram of maximum shear stress of landslide under natural conditions
图 9 天然工况下滑坡剪应变增量云图
Figure 9. Incremental cloud diagram of the landslide shear strain under natural conditions
图 10 天然工况下滑坡x、y和z方向应力云图
Figure 10. Stress cloud diagram of landslide under natural conditions in the x, y and z directions
图 12 隧道开挖后滑坡附加总位移云图
Figure 12. Cloud diagram of the additional total displacement of the landslide after tunnel excavation
图 13 隧道开挖后滑坡剪应变增量图
Figure 13. Incremental diagram of the landslide shear strain after tunnel excavation
图 14 隧道开挖后衬砌的轴力、弯矩和变形云图
Figure 14. Cloud diagrams of the axial force, bending moment and deformation of the lining after tunnel excavation
图 15 降雨工况下主滑断面位移云图(a)、剪应变增量云图(b)和俯视总位移云图(c)
Figure 15. Cloud diagram of the displacement cloud diagram (a), the shear strain increment (b) and the top view of the total displacement (c) of the main sliding section under rainfall conditions
图 17 隧道绕避改线三维示意图
Figure 17. Three-dimensional schematic diagram of tunnel bypassing and changing line
表 1 滑坡各层岩土体物理力学参数
Table 1. Physical and mechanical parameters of each layer of the landslide
模型分组 弹性模量/MPa 泊松比 容重/(kN·m-3) 黏聚力/kPa 内摩擦角/(°) 渗透系数/(m·d-1) 滑床 36 740 0.26 26 / / 0.001 滑体 2 178 0.29 20 28 35 1.2 滑带 牵引段 36.8 0.35 19.85 20 30 0.03 主滑段 36.8 0.35 19.85 15 28 0.03 抗滑段 36.8 0.35 19.85 20 30 0.03 
下载: 导出CSV
-
[1] Yamada K, Watari M, Kobashi S. Landslide and slope failure and its prevention and control[M]. Translation Group Translation. Beijing: Science Press, 1980(in Chinese). [2] 马惠民. 坡体病害与隧道变形问题[J]. 岩石力学与工程学报, 2003, 22(增刊2): 2719-2724. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2003S2038.htmMa H M. Discussion on problems of slope disaster and tunnel deformation[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(S2): 2719-2724(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2003S2038.htm [3] 吴红刚. 隧道-滑坡体系的变形机理及控制技术研究[D]. 北京: 中国铁道科学研究院, 2012.Wu H G. Research on deformation mechanism and control technology of tunnel-landslide system[D]. Beijing: China Academy of Railway Sciences, 2012(in Chinese). [4] 吴红刚, 杨涛, 马惠民, 等. 隧道-滑坡体系的预加固机制及模型试验研究[J]. 岩石力学与工程学报, 2014, 33(增刊2): 3531-3538. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2014S2018.htmWu H G, Yang T, Ma H M, et al. Research of pre-reinforcement mechanism and model test of tunnel-landslide system[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(S2): 3531-3538(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2014S2018.htm [5] 周德培, 毛坚强, 张鲁新, 等. 隧道变形与坡体灾害相互关系及其预测模式[J]. 铁道学报, 2002, 24(1): 81-86. https://www.cnki.com.cn/Article/CJFDTOTAL-TDXB200201017.htmZhou D P, Mao J Q, Zhang L X, et al. Relationship between tunnel deformation with slope disasters and its prediction model[J]. Journal of the China Railway, 2002, 24(1): 81-86(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-TDXB200201017.htm [6] 李家龙, 罗骋华, 周文皎. 隧道平行穿越滑坡体的变形特征及控制技术[J]. 铁道建筑, 2020, 60(8): 85-89. https://www.cnki.com.cn/Article/CJFDTOTAL-TDJZ202008019.htmLi J L, Luo C H, Zhou W J. Deformation characteristics and control technology of tunnel-landslide parallel system[J]. Railway Engineering, 2020, 60(8): 85-89(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-TDJZ202008019.htm [7] 魏家旭, 张玉芳. 香丽高速公路昌格洛老滑坡稳定性研究[J]. 铁道建筑, 2019, 59(8): 108-112. https://www.cnki.com.cn/Article/CJFDTOTAL-TDJZ201908026.htmWei J X, Zhang Y F. Study on Changgeluo section of Shangri-La to Lijiang Expressway side slope stability[J]. Railway Engineering, 2019, 59(8): 108-112(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-TDJZ201908026.htm [8] 张玉芳. 边坡病害及治理工程效果评价[M]. 北京: 科学出版社, 2009.Zhang Y F. Evaluation of slope diseases and treatment projects[M]. Beijing: Science Press, 2009(in Chinese). [9] 张玉芳. 道路边坡灾害整治新技术及应用[C]//中国科学技术协会, 交通运输部, 中国工程院. 2018世界交通运输大会论文集. 北京: 中国科学技术协会, 交通运输部, 中国工程院, 2018.Zhang Y F. New technology and application of road slope disaster rreatment[C]//China Association of Science and Technology, Ministry of Transport, Chinese Academy of Engineering. Papers of the 2018 World Transport Congress. Beijing: China Association of Science and Technology, Ministry of Transport, Chinese Academy of Engineering, 2018(in Chinese). [10] 周文皎. 滑坡-隧道相互作用分析及控制对策[D]. 北京: 中国铁道科学研究院, 2020.Zhou W J. Analysis and control measures of landslide-tunnel interaction[D]. Beijing: China Academy of Railway Sciences, 2020(in Chinese). [11] 周文皎, 魏少伟, 张玉芳. 多次分段注浆钢花管单桩抗滑性能模型试验研究[J]. 岩土力学, 2019, 40(11): 1-10. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201911032.htmZhou W J, Wei S W, Zhang Y F. Model test study on anti-sliding mechanism of multiple segment grouting steel-tube[J]. Rock and Soil Mechanics, 2019, 40(11): 1-10(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201911032.htm [12] 蔡乔宇. 丽香线黄山哨隧道进口段岩堆边坡稳定性分析[D]. 成都: 西南交通大学, 2019.Cai Q Y. Stability analysis of talus slope at the entrance of Huangshanshao Tunnel of Lixiang Railway[D]. Chengdu: Southwest Jiaotong University, 2019(in Chinese). [13] 牌立芳, 赖天文, 吴红刚. 陆路交通隧道-滑坡平行体系模型建立与试验验证[J]. 铁道建筑, 2018, 58(12): 64-68. https://www.cnki.com.cn/Article/CJFDTOTAL-TDJZ201812016.htmPai L F, Lai T W, Wu H G. Land traffic tunnel-landslide parallel system model establishment and experimental validation[J]. Railway Engineering, 2018, 58(12): 64-68(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-TDJZ201812016.htm [14] 中国铁道科学研究院集团有限公司. 香丽高速公路昌格洛隧道出口滑坡评估报告[R]. 北京: 中国铁道科学研究院集团有限公司, 2016.China Academy of Railway Sciences Co., Ltd. Evaluation report on landslide at the exit of Changeluo Tunnel on Shangri-La to Lijiang Expressway[R]. Beijing: China Academy of Railway Sciences Co., Ltd., 2018(in Chinese). [15] 袁坤, 张玉芳, 雷鸣, 等. 多次分段控制注浆斜向预应力钢锚管锚索组合结构加固技术现场试验[J]. 科学技术与工程, 2020, 20(25): 10504-10510. https://www.cnki.com.cn/Article/CJFDTOTAL-KXJS202025056.htmYuan K, Zhang Y F, Lei M, et al. Field test on reinforcement technology of steel anchor pipe and anchor cable composite structure with multi-stage control grouting in inclined direction[J]. Science Technology and Engineering, 2020, 20(25): 10504-10510(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-KXJS202025056.htm [16] 唐军峰, 唐雪梅, 肖鹏, 等. 库水位升降与降雨作用下大型滑坡体渗流稳定性分析[J]. 地质科技通报, 2021, 40(4): 153-161. doi: 10.19509/j.cnki.dzkq.2021.0409Tang J F, Tang X M, Xiao P, et al. Analysis of seepage stability of large-scale landslide under water-level fluctuation and rainfall[J]. Bulletin of Geological Science and Technology, 2021, 40(4): 153-161(in Chinese with English abstract). doi: 10.19509/j.cnki.dzkq.2021.0409 [17] 杨背背, 殷坤龙, 梁鑫, 等. 三峡库区麻柳林滑坡变形特征及演化模拟[J]. 地质科技通报, 2020, 39(2): 122-129. doi: 10.19509/j.cnki.dzkq.2020.0213Yang B B, Yin K L, Liang X, et al. Deformation characteristics and evolution simulation of the Maliulin landslide in the Three Gorges Reservoir area[J]. Bulletin of Geological Science and Technology, 2020, 39(2): 122-129(in Chinese with English abstract). doi: 10.19509/j.cnki.dzkq.2020.0213 [18] 张怡悦, 殷坤龙, 陈丽霞, 等. 奉节县曾家棚滑坡时空差异性变形特征与成因机制分析[J]. 地质科技通报, 2020, 39(2): 148-157. doi: 10.19509/j.cnki.dzkq.2020.0216Zhang Y Y, Yin K L, Chen L X, et al. Characteristics and mechanism of spatio-temporal difference deformation of Zengjiapeng landslide[J]. Bulletin of Geological Science and Technology, 2020, 39(2): 148-157(in Chinese with English abstract). doi: 10.19509/j.cnki.dzkq.2020.0216 -
下载:
点击查看大图
计量
- 文章访问数: 561
- PDF下载量: 36
- 被引次数: 0
