有限元强度折减法下的岩土边坡稳定分析  

Analysis of Geotechnical Slope Stability Under Strength Reduction Finite Element Method

作　　者：刘航宇 LIU Hangyu(China Railway 11th Bureau Group Co.,Ltd.,Wuhan,Hubei Province,430000 China)

机构地区：[1]中铁十一局集团有限公司,湖北武汉430000

出　　处：《科技资讯》2024年第19期251-253,共3页Science & Technology Information

摘　　要：岩土边坡稳定性分析是岩土工程中的重要课题,传统的极限平衡法存在一些缺陷和不足,难以准确反映边坡的真实破坏状态。采用有限元强度折减法,对一个节理岩质边坡进行了稳定性分析,通过不断降低边坡的强度参数,直到模型发生破坏,计算出边坡的安全系数,并确定了边坡的滑动面;还采用了不同的稳定判断准则,如计算收敛与否、位移突变、塑性区贯通等,综合评价了边坡的稳定性。结果表明,有限元强度折减法可以有效地模拟岩质边坡的破坏过程,考虑了边坡的复杂几何形状、材料非线性、节理裂隙等影响因素,提高了分析的精度和可靠性,为边坡工程设计和施工提供了参考依据。Geotechnical slope stability analysis is a crucial topic in geotechnical engineering.The traditional Limit Equilibrium method has some flaws and limitations,making it difficult to accurately reflect the real failure state of the slope.It adopts the Finite Element Strength Reduction method to analyze the stability of a jointed rock slope.By continuously reducing the strength parameters of the slope until the model collapses,the safety factor of the slope is calculated and the sliding surface of the slope is determined.It also adopts different stability assessment criteria,such as calculation convergence,displacement jump,plastic zone penetration,etc.,to comprehensively evaluate the stability of the slope.The results show that the Finite Element Strength Reduction method can effectively simulate the failure process of the rock slope,taking into account the complex geometric shape,material nonlinearity,joint fissures and other influencing factors of the slope,improving the accuracy and reliability of the analysis,and providing a reference for the design and construction of slope engineering.

关 键 词：有限元强度折减法 边坡稳定分析 有限元模型 摩尔-库仑等面积圆屈服准则 

分 类 号：TU43[建筑科学—岩土工程]