利用交替变度量法搜索边坡临界滑动面
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摘要
在边坡工程中,如何准确、迅速地确定临界滑动面是治理边坡的关键问题。但传统极限平衡法存在准确性难以保证、搜索法工作量大和搜索中易陷入局部最小值陷阱等问题。提出了搜索边坡临界滑动面的交替变度量法,结合有限元强度折减法确定初始滑动面,采用均质典型算例进行分析,与常用的传统极限平衡法计算结果进行比较,验证了该方法的有效性和高效性。
In slope engineering,how to accurately and quickly determine the critical sliding surface is the key problem of the slope control. However,the traditional limit equilibrium method is difficult to guarantee the accuracy,the search method is large and easy to fall into the local minimum trap. In this paper,using the alternative variable metric method to search the critical slip surface of slope,combined with strength reduction finite element method to determine the initial sliding surface,and compared with result of traditional limit equilibrium method by an analysis of homogeneous slope example,the effectiveness and efficiency of the method are verified.
In slope engineering,how to accurately and quickly determine the critical sliding surface is the key problem of the slope control. However,the traditional limit equilibrium method is difficult to guarantee the accuracy,the search method is large and easy to fall into the local minimum trap. In this paper,using the alternative variable metric method to search the critical slip surface of slope,combined with strength reduction finite element method to determine the initial sliding surface,and compared with result of traditional limit equilibrium method by an analysis of homogeneous slope example,the effectiveness and efficiency of the method are verified.
引文
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[3]杨光华,钟志辉,张玉成,等.用局部强度折减法进行边坡稳定性分析[J].岩土力学,2010,31(S2):53-58.
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[6]孙冠华,郑宏,李春光.基于等效塑性应变的边坡滑动面搜索[J].岩土力学,2008,29(5):1159-1163.
[7]I.B.Donald,P.Giam.The ACADS slope stability programs review.Proc[A].The 6th International Symposium on Landslides[C].1992:1665-1670.
[2]李春光,朱宇飞,刘丰,等.基于下限原理有限元的强度折减法[J].岩土力学,2012,33(6):1816-1821.
[3]杨光华,钟志辉,张玉成,等.用局部强度折减法进行边坡稳定性分析[J].岩土力学,2010,31(S2):53-58.
[4]马昌凤.最优化方法及其Matlab程序设计[M].北京:科学出版社,2010.
[5]CHEN Zuyu,SHAO Changming.Evaluation of factor of safety in slope stability analysis[J].Canadian Geotechnical Journal,1988,25(4):735-748.
[6]孙冠华,郑宏,李春光.基于等效塑性应变的边坡滑动面搜索[J].岩土力学,2008,29(5):1159-1163.
[7]I.B.Donald,P.Giam.The ACADS slope stability programs review.Proc[A].The 6th International Symposium on Landslides[C].1992:1665-1670.