摘要
在岩土工程初始地应力场的拟合研究中,一般根据地应力场分布的规律,在研究对象的边界上假定初始地应力场的分布模式,通过数值计算方法,利用拟合或者回归的方法逼近地应力实测值。将计算模型边界上位移看成为基本位移模式的组合,在计算模型的边界上施加位移边界条件模拟构造运动,基于地应力实测结果,拟合区域的初始地应力场。计算实例表明,该方法拟合得到的地应力结果比较准确,方法是可行的。
In the research of fitting initial geostress for geotechnical engineering, in general, numerical calculation method is used to get close to in situ geostress values in the whole interested region after some in situ stress are known, in which according to the general distribution law of the geostress the distribution pattern of initial geostress field along the boundary of studied region is assumed and fitting or regression analyzing method is employed to determine the stress values. In this paper, the displacement on calculation model＇s boundary is considered as the compounding of the basic displacement, the tectonic movement is simulated through applying displacement boundary conditions to calculation model＇s boundary. Based on the measured geostresses the value of the displacements is got, and then stresses in the model become known. The calculation example shows that the calculated results are in agreement with the measured ones and the presented method is effective.
出处
《矿业研究与开发》
CAS
北大核心
2006年第1期28-30,86,共4页
Mining Research and Development
关键词
初始地应力场
位移边界条件
构造应力
回归分析
Initial geostress field, Displacement Boundary Condition, Tectonic stress, Regression analysis,
