人民黄河Issue(5)：116-119,4.DOI:10.3969/j.issn.1000-1379.2014.05.037
锦屏水电站地下厂房初始地应力场反演分析
Regression Analysis of Initial Geostress Field of Underground Workshop of Jinping Hydropower Station
摘要
Abstract
Combined with complex geological conditions of Jinping Hydropower Station,the finite element method and BP artificial neural network had been used for regression analysis of initial geostress field in research area. The results show that the principal stress increases gradually from top to bottom,the distribution of principal stress increases with the increasing buried depth,the main stress contour is greatly affected by topography in the shallow area;close to the surface and the bottom of the valley,the distribution of stress contour is more intensive,the change gradient of stress is greater and stress concentration phenomenon appeared;the surface and shallow principal stress dip angle is basically the same as the mountain slope angle in the underground workshop area,in the deep region,the maximum principal stress inclination increased with the increasing of depth;the initial stress field distribution calculated by numerical simulation is closely related to the topography in the study area,while the lithology has smaller influence on the distribution of stress field;stress measured value is closer to the regression value of BP artificial neural network and regres-sion accuracy can meet the actual needs of the project.关键词
初始地应力/回归分析/人工神经网络/锦屏水电站Key words
initial geostress/regression analysis/artificial neural network/Jinping Hydropower Station分类
建筑与水利引用本文复制引用
钱娟娟,吴立,左清军..锦屏水电站地下厂房初始地应力场反演分析[J].人民黄河,2014,(5):116-119,4.基金项目
武汉市科技局社会发展科技攻关计划项目（201160823268）。 （）
