坝址区三维初始地应力场的应力反演回归分析  

Stress Regression Analysis of the 3D Initial Geo-stress Field of Dam Site

作　　者：谷艳昌[1] 何鲜峰[1] 梁月英[1] 景继 

机构地区：[1]河海大学水利水电工程学院,江苏南京210098

出　　处：《水力发电》2007年第2期26-30,共5页Water Power

基　　金："973"计划课题(2002CB412707);国家自然科学基金委员会;二滩水电开发有限责任公司雅砻江水电开发联合研究基金项目(50539030-1-3);国家自然科学基金重点项目(50539010)

摘　　要：工程中较为准确地计算模拟坝址区三维初始地应力场,对于模拟坝肩、边坡开挖等具有重要意义。针对坝址区特殊的“V”形地形条件,在各个基本因素单独作用下,借助通用有限元程序MSC.Marc,对建立的三维有限元模型进行模拟计算。其中,分别采用均匀分布、三角形分布和梯形分布荷载来模拟顺河向及横河向挤压构造运动作用;建立初始应力场回归模型,以回归精度为目标函数,优化基本因素组合。通过对结果的分析,得出了有益的结论。There is realistic meaning to more precisely simulate the geo-stress field in the project region. The method of FEM stress regression analysis is a popular one. Aimed to the letter V topographty, the fine 3D FEM model is built. For every individual factor, a corresponding calculation is executed by MSC.Marc. Especially, to simulate the horizontal compressed tectonic movements, three kinds of distributed loads are appied. The model for the 3D Initial Geo-stress Field is build. By the regression precision as the object function, the combinatory cases are optimized and some conclusions are obtained.

关 键 词：初始地应力场 三维有限元 MSC.Marc 水平挤压构造运动 回归分析 

分 类 号：TV311[水利工程—水工结构工程]