Numerical Simulation on Landslide  Stability Affected by Seepage FieldVariation Caused by Tunnel Excavation

ZHANG Fan; HAN Ai-guo; REN Guang-ming; DU Fei; WU Long-ke; ZHAN Ke

doi:10.3969/j.issn.1001-5485.2015.05.012

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Journal of Changjiang River Scientific Research Institute ›› 2015, Vol. 32 ›› Issue (5) : 61-65. DOI: 10.3969/j.issn.1001-5485.2015.05.012

Numerical Simulation on Landslide Stability Affected by Seepage FieldVariation Caused by Tunnel Excavation

ZHANG Fan^1,2, HAN Ai-guo¹, REN Guang-ming¹, DU Fei¹, WU Long-ke¹, ZHAN Ke¹

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Abstract

The aim of this research is to investigate in landslide’s seepage field, slope deformation and stability affected by tunnel excavation. On the basis of analysing the physical and mechanical and water physical properties of a landslide slope, we simulated the variation of groundwater level and seepage field before and after tunnel excavation using 3D finite difference software Modflow. Furthermore, by employing Geo-Studio, we analyzed the stability and deformation of landslide after water level changed in natural and excavation conditions. Results reveal that the groundwater seepage field changed after tunnel excavation, and obvious water inflow was found at the excavation area. As a result, the groundwater level decreased about 20m and apparent “sinkholes” appeared in the excavation area. The change of groundwater level was mainly reflected in the front edge of landslide. The deformation of 2^# secondary sliding body, which caused the deformation of 1^# secondary sliding body, exacerbated under the combined actions of weakened sliding resistance and increased effective stress. The maximum slope deformation of secondary landslide above the tunnel reached 12.42 cm, but the stability changed slightly.

Key words

landslide / deformation / stability / tunnel excavation / seepage field

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ZHANG Fan, HAN Ai-guo, REN Guang-ming, DU Fei, WU Long-ke, ZHAN Ke. Numerical Simulation on Landslide Stability Affected by Seepage FieldVariation Caused by Tunnel Excavation[J]. Journal of Changjiang River Scientific Research Institute. 2015, 32(5): 61-65 https://doi.org/10.3969/j.issn.1001-5485.2015.05.012

References

[1] 施成华.隧洞开挖及疏水引起的地表沉降与变形.中国公路学报,2007,20(1):91-95.(SHI Cheng-hua. Ground Surface Settlement and Deformation Caused by Tunnel Excavation and Dewatering. China Journal of Highway and Transport, 2007, 20 (1): 91-95. (in Chinese))
[2]张倬元,王士天,王兰生.工程地质分析原理.北京:地质出版社,2009:249-250. (ZHANG Zhuo-yuan, WANG Shi-tian, WANG Lan-sheng. Principle of Engineering Geological Analysis. Beijing: Geological Publishing House, 2009: 249-250. (in Chinese))
[3] 张宏仁,李俊亭.有限差分法与有限单元法在渗流问题中的对比. 水文地质工程地质.1979,(2):50-55. (ZHANG Hong-ren, LI Jun-ting. Comparison between Finite Difference Method and Finite Element Method in Seepage Problems. Hydrogeology and Engineering Geology, 1979 ,(2):50-55. (in Chinese))
[4] 张宏仁.解渗流问题数值方法对比. 水文地质工程地质, 1984,(4): 23-29. (ZHANG Hong-ren. Numerical Methods Solution to Seepage Problem. Hydrogeology and Engineering Geology, 1984 , (4) : 23-29. (in Chinese))
[5] 薛禹群,谢春红,戴水汉.在三维渗流问题中等参数有限元法的应用.水文地质工程地质, 1979,(3): 36. (XUE Yu-qun, XIE Chun-hong, DAI Shui-han. Application of Isoparametric Finite Element Method in Three-dimensional Seepage Problem. Hydrogeology and Engineering Geology, 1979, (3): 36. (in Chinese))
[6] 刘宝琛,阳军生,张家生.露天开挖及疏水引起的地面沉降及变形.煤炭学报,1999,24(1):39-42. (LIU Bao-chen, YANG Jun-sheng, ZHANG Jia-sheng. Ground Subsidence Deformation Caused by Outdoor Excavation and Dewatering. Journal of China Coal Society, 1999, 24 (1): 39-42. (in Chinese))
[7] 施成华,彭立敏.浅埋隧洞开挖纵向地表变形预测及其基本规律.中国公路学报,2004,17(2):73-77. (SHI Cheng-hua, PENG Li-min. Prediction and Basic Regularities of Longitudinal Surface Deformation of Shallow Buried Tunnel. China Journal of Highway and Transport, 2004,17(2): 73-77.(in Chinese))
[8] 朱冬林, 任光明, 聂德新, 等.库水位变化对水库滑坡稳定性影响的预测. 水文地质工程地质, 2002,(3): 6-9.(ZHU Dong-lin, REN Guang-ming, NIE De-xin, et al. Effecting and Forecasting of Landslide Stability with the Change of Reservoir Water Level. Hydrogeology and Engineering Geology, 2002, (3): 6-9.(in Chinese))
[9] 王春山,石昱桢,聂德新.深厚覆盖层在水库蓄水后渗流场变化情况下稳定性分析.工程地质学报,2010,18(3):419-424.(WANG Chun-shan, SHI Yu-zhen, NIE De-xin. Stability and Deformation of Deep and Thick Overburden Due to Changed Seepage Conditions after Reservoir Impounding. Journal of Engineering geology, 2010,18(3): 419-424.(in Chinese))
[10]PREISIG G, DEMATTEIS A, TORRI R, et al. Modeling Discharge Rates and Ground Settlement Induced by Tunnel Excavation. Rock Mechanics and Rock Engineering, 2014, 47(3): 869-884.
[11]MICHAEL G,HARBAUGH A W.MODGLOW:A Three Dimension Finite Difference Ground-water Flow Model. Washington D C: U. S. Government Printing Office, 1988.
[12]朱冬林,聂德新,葛修润.3D-Modflow在模拟库岸滑坡工程地下水分布中的应用初探.岩土力学,2002,23(3):378-381. (ZHU Dong-lin, NIE De-xin, GE Xiu-run. Preliminary Application of 3D-Modflow in Simulating Distribution of Groundwater in Reservoir Bank Landslide. Rock and Soil Mechanics, 2002, 23(3): 378-381.(in Chinese))
[13]程彬,卢靖.基于Geostudio的边坡渗流场与应力场耦合分析.山西建筑,2010,36(3):147. (CHENG Bin, LU Jing. Coupling Analysis of Seepage Field and Stress Field of Slope Based on Geostudio. Shanxi Architecture, 2010,36(3):147.(in Chinese))
[14]吴越,刘东升,袁兴平.水位下降作用下边坡渗流场及稳定性分析.地下空间与工程学报,2008,4(6):1067-1070. (WU Yue, LIU Dong-sheng, YUAN Xing-ping. Analysis on Slope Seepage Field and Stability in Drawdown of Reservoir Water Level. Chinese Journal of Underground Space and Engineering, 2008, 4(6): 1067-1070. (in Chinese))