| 小湾水电站坝址区三维初始地应力场反演回归分析 |
| |
| 引用本文： | 谷艳昌,郑东健,郭航忠,何鲜峰.小湾水电站坝址区三维初始地应力场反演回归分析[J].岩土力学,2008,29(4):1015-1020. |
| |
| 作者姓名： | 谷艳昌 郑东健 郭航忠 何鲜峰 |
| |
| 作者单位： | 河海大学水电学院 南京 210098 |
| |
| 基金项目： | 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
,
国家重点基础研究发展计划(973计划)
,
国家自然科学基金雅砻江水电开发联合研究基金重点项目 |
| |
| 摘 要： | 基于小湾水电站坝址区工程地质地形条件，研究分析了影响工程考察域初始地应力场的基本因素及其空间分布，建立了坝址区三维有限元计算模型和初始地应力场参数空间分布模型；利用大型通用有限元软件MSC.Marc和地应力实测资料，借助最小二乘法原理，以回归精度为目标函数，优化了构造挤压荷载的模拟和作用组合，实现了初始应力场空间分布模型的参数估计。计算结果表明，改进后的方法较传统方法回归精度有了较大提高，能较为合理地模拟小湾坝址区三维初始地应力场。
|
| 关 键 词： | 小湾水电站 初始地应力 构造运动 空间分布模型 |
| 文章编号： | 1000-7598-(2008)04-1015-06 |
| 收稿时间： | 2006-07-10 |
| 修稿时间： | 2006年7月10日 |
Regression analysis of 3D initial geostress field for dam site of Xiaowan Hydropower Station |
| |
| GU Yan-chang,ZHENG Dong-jian,GUO Hang-zhong,HE Xian-feng.Regression analysis of 3D initial geostress field for dam site of Xiaowan Hydropower Station[J].Rock and Soil Mechanics,2008,29(4):1015-1020. |
| |
| Authors: | GU Yan-chang ZHENG Dong-jian GUO Hang-zhong HE Xian-feng |
| |
| Institution: | College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China |
| |
| Abstract: | According to the specific geological and topographical conditions at dam site of Xiaowan Hydropower Station, fundamental influencing factors and spatial distribution of initial geostress are analyzed. The 3D FEM model and the parameters spatial distribution regression model are built. For each factor, a corresponding calculation is executed with MSC.Marc program. Taking the regression precision as the objective function, the boundary extrusion loads are optimized to simulate the field caused by horizontal compressed tectonic movements. Finally, all parameters of the regression model are estimated. The result of back regression analysis shows that the improved method is available with higher precision, and can simulate 3D initial geostress field more practically. So sa to provide a basis for further exeavating simulation of similar projeets |
| |
| Keywords: | Xiaowan Hydropower Station initial geostress tectonic movements spatial distribution model |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
