强降雨下软弱高陡边坡安全性评估方法研究
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摘要
为更有效地监测、预测以及控制高陡边坡的滑坡失稳,以某公路工程的高陡边坡为研究对象,采取传统极限平衡法与有限元强度折减相结合,并结合现场变形监测对其稳定性做出了评估。首先通过GeoStudio极限平衡分析软件对高陡边坡的稳定系数进行确定,再通过Abaqus有限元强度折减法对变形特征进行分析,最后与现场变形监测数据进行对比。结果表明:降雨等因素对边坡稳定性影响显著,极限平衡法与有限元强度折减相结合能较为准确预测边坡变形特征与位移,可用于高陡边坡安全性评估。
This paper presents a case history of effectively monitoring,predicting and mitigating the landslides of large highway slopes.The conventional limit equilibrium method and finite element method using strength reduction are used in the stability evaluation and the results are compared with the monitoring data.In the stability analysis,the limit equilibrium method was performed by using the commercial software GeoStudio.And the finite element simulation was conducted using ABAQUS software.The results indicate that,the precipitation has a strength effect of the stability of highway slopes.The deformation of the highway slopes can be estimated using the combination of limit equilibrium and finite element methods.
This paper presents a case history of effectively monitoring,predicting and mitigating the landslides of large highway slopes.The conventional limit equilibrium method and finite element method using strength reduction are used in the stability evaluation and the results are compared with the monitoring data.In the stability analysis,the limit equilibrium method was performed by using the commercial software GeoStudio.And the finite element simulation was conducted using ABAQUS software.The results indicate that,the precipitation has a strength effect of the stability of highway slopes.The deformation of the highway slopes can be estimated using the combination of limit equilibrium and finite element methods.
引文
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[2]史卜涛,张云,张巍.边坡稳定性分析的物质点强度折减法[J].岩土工程学报,2016,38(9):1678-1684.
[3]房智恒,王李管,彭南良,等.高陡边坡整体与局部失稳的强度折减及安全度判别分析[J].重庆大学学报,2015,38(6):8-14.
[4]万少石,年廷凯,蒋景彩,等.边坡稳定强度折减有限元分析中的若干问题讨论[J].岩土力学,2010,31(7):2283-2288.
[5]连镇营,韩国城,孔宪京.强度折减有限元法研究开挖边坡的稳定性[J].岩土工程学报,2001,23(4):407-411.
[6]李卫庆.有限元法在边坡稳定及加固分析中的应用[J].重庆交通学院学报,2006,25(5):85-87.
[7]陈金锋,宋二祥,徐明.强度折减有限元法在昆明新机场高填方边坡稳定分析中的应用[J].岩土力学,2011,2(S1):636-641.