Regression analysis of 3D initial geostress field for dam site of Xiaowan Hydropower Station
Regression analysis of 3D initial geostress field for dam site of Xiaowan Hydropower Station
复制标题
小湾水电站坝址三维初始地应力场回归分析
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
He, Xian-Feng
中科院分区：
文献类型：
--
作者：
Gu, Yan-Chang;Guo, Hang-Zhong;Zheng, Dong-Jian;He, Xian-Feng
根据小湾水电站坝址区的具体地质地形条件，分析了初始地应力的基本影响因素和空间分布规律，建立了三维有限元模型和参数空间分布回归模型，对各影响因素用MSC.Marc程序进行了相应的计算，以回归精度为目标函数，对边界挤压载荷进行优化，模拟水平挤压构造运动场，最后对回归模型的各项参数进行估计，反回归分析结果表明，改进后的方法具有较高的精度，该模型能较好地模拟三维初始地应力场，为类似工程的进一步深化模拟提供了依据
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