基于参数反演法的面板堆石坝竣工期应力应变分析

Stress-strain analysis of concrete face rockfill dam during completion period based on parameter inversion method

根据某面板堆石坝坝体几何参数和周围山体地形地质资料,建立面板堆石坝三维数值计算模型。根据工程类比方法初步确定堆石体、面板及挤压边墙粘弹塑性参数的取值范围,通过均匀设计方法在坝体材料粘弹塑性参数的可能取值范围内进行方案设计。以集成神经网络和遗传算法的智能优化方法为手段,对面板堆石坝竣工期应力应变进行分析计算,为面板堆石坝后期的稳定性与安全性提供重要依据。

Based on the geometric parameters of a concrete face rockfill dam as well as the topographic and geological data of surrounding hills,a3D numerical model of the dam is established in this paper.And the range of viscoelastic-plastic parameters of rockfill,face slab and extruded side wall is preliminarily determined based on the engineering analogy method.Then,the uniform design method is used to design various schemes within the possible range of these viscoelastic-plastic parameters.Finally,the stress and strain of concrete face rockfill dam during its completion period are analyzed by intelligent optimization method based on integrated neural network and genetic algorithm,which provides an important basis for evaluating the stability and safety of the dam in later period.