基于挤压边墙技术的面板堆石坝应力变形研究

Research on Stress-strain Behavior of CFRD Based on Extrusion Sidewall Technique

为研究挤压边墙对面板堆石坝应力变形的影响,以某面板堆石坝为例,采用非线性有限元法建立二维、三维几何模型,对比有、无挤压边墙施工方法坝体的应力和变形规律,并分析了挤压边墙混凝土参数、面板与挤压边墙接触填料参数的敏感性。结果表明,采用挤压边墙技术的该面板堆石坝坝体及面板应力变形均在合理范围内,并获得了挤压边墙混凝土参数取值、面板与挤压边墙接触填料参数取值及坝体与面板应力变形的规律。

In order to analyze the influence of extrusion-sidewall on stress and deformation of CRFD, taking a certain CRFD for an example, nonlinear finite element method is used to establish two-dimensional and three dimensional geometric models. The stress and deformation of dam body is comparative analysis with and without extrusion sidewall construction. And then, the sensitivity of extrusion sidewall concrete parameters and contact surface parameters are analyzed. The results show that the distribution of stress and deformation of the dam body and face slab is in the reasonable scope it obtains the parameters value of extrusion sidewall concrete, the contact material of the extrusion sidewall and face slab, the stress-strain distribution of dam body and face slab.