基于SVM-GEP岩质边坡可靠性分析  

Reliability Analysis of Rock Slope Based on SVM-GEP Method

作　　者：贺子光[1] 张玉娇[1] 孟强[1] 李东利[1] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454000

出　　处：《洛阳理工学院学报（自然科学版）》2013年第2期23-30,共8页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

摘　　要：由于岩质边坡通常存在节理、裂隙等不连续面,边坡滑动模式的稳定性系数是一个隐函数,导致了在其相应的可靠度研究中建立显式的极限状态方程是不可能的。为了解决这一问题,本文提出了基于SVM-GEP岩质边坡的可靠性分析方法。该方法中,以节理面性质参数及几何参数为随机变量,采用离限元结合强度折减法计算岩质边坡的稳定性系数,通过S VM对已有数据进行训练,然后对检测数据预测,采用最小二乘法对这些数据进行拟合,得到显示的极限状态函数,并应用G EP方法计算可靠度及相应的验算点,以消除经典方法在可靠度指标求解过程中方程线性化带来的误差。研究表明:应用SVM-GEP方法分析岩质边坡的可靠性是可行的。The stability coefficient of slope sliding mode is an implicit function owing to the joints, fissures and discontinuities in rock slope, which leads to the impossibility to establish the explicit limit state equation in the corresponding reliability study. To solve this problem, a reliability analysis method based on SVM-GEP for rock slope is presented in this paper. Taking the joint property parameter and the geometric parameter as the random variables, it calculates the stability coefficient by combining the discrete element method with the strength reduction method. Then it trains the existing data through SVM and forecasts the test data which are fitted by the least squares method to acquire the limit state function. The reliability and its corresponding checking point have been calculated by GEP method to eliminate the errors caused by the linearized equation in the process of reliability index solution. Study shows that it is feasible to apply the SAM-GEP method to the reliability analysis of rock slope.

关 键 词：岩质边坡 支持向量机 基因表达式编程(GEP) 可靠度 

分 类 号：TU451[建筑科学—岩土工程]