岩质边坡混凝土置换体加固效应等效模拟计算研究

Equivalent Simulation Calculation for Reinforcement Effect of Concrete Replacement on Rock Slope

目前在利用等效模拟方法计算岩质边坡混凝土置换体加固效应时,等效置换体抗剪强度取值仍依赖于工程经验。笔者基于支持向量机(SVM)理论,建立置换体混凝土弹性模量、抗压强度和置换面积与置换体等效抗剪强度之间的关系预测模型,并对SVM预测模型进行评价;模型样本取自典型概化边坡有限元计算结果。工程实例计算结果表明,利用模型预测的等效抗剪强度开展等效模拟计算与有限元精细模拟计算所得的岩质边坡抗滑稳定安全系数基本相同,表明文中提出的预测模型是合理的。

At present,when the equivalent simulation method is used to calculate the reinforcement effect of concrete replacement body of rock slope,the shear strength of equivalent replacement body still depends on engineering experience.Based on the theory of support vector machine(SVM),the prediction model of the relationship between the elastic modulus,compressive strength,replacement area and the equivalent shear strength of the replacement concrete is established,and the SVM prediction model is evaluated.The model samples are taken from the finite element calculation results of the typical generalized slope.The calculation results of engineering examples show that the safety factor of rock slope stability obtained by equivalent simulation calculation using the equivalent shear strength predicted by the model is basically the same as that obtained by finite element fine simulation calculation,which indicates that the prediction model proposed in this paper is reasonable.