摘要
初始地应力的准确确定关系着地下工程的设计、施工和岩体的稳定性分析,目前初始地应力场的反演大多基于回归分析或者优化求解,普遍存在着精度不高或者计算效率缓慢等问题.考虑到构造因素的内在相关性和地应力分布的实际规律,提出了模拟构造作用时模型边界施加与实际荷载相一致的逐步多元回归方法,经验证表明该法可降低回归规模,精度较高,可用于工程实际.
The in-situ stress plays a key role in design, construction and stability analysis of undergroundengineering. Many methods based on the regression analysis or optimization theory areapplied to solving in-situ stress inversion. However, the accuracy is not high and the computingefficiency is low. Considering the tectonism＇s inherent correlation and the actual law of in-situstress distribution,the method of stepwise multiple regression that the boundary load applied accordingto the actual in-situ stress distribution is proposed. The practice shows that the method isaccurate and the scale of regression model is small,so it is worth applying to the practice.
出处
《兰州交通大学学报》
CAS
2016年第3期52-57,共6页
Journal of Lanzhou Jiaotong University
关键词
逐步多元回归
初始地应力
反演
构造应力场
stepwise multiple regression
in-situ stress
inversion
tectonic stress field
