摘要
针对GM(1,1)模型在隧道围岩变形预测中的缺点,提出采用模型维数控制的方法进行预测。研究GM(1,1)模型的数学原理,针对隧道围岩的变形特点利用数学方法改进模型背景值的计算公式,并利用等维替代法不断更新预测模型。通过对比传统GM(1,1)模型可知,改进后的模型预测精度有较大提高,能较好预测围岩实际变形情况和趋势。
The method of model dimension control to predict is put forward due to the weakness of GM（1,1） model in deformation prediction of tunnel surrounding rocks. Meanwhile, by means of math principle of GM（1,1） model, the study improves the calculating formula of background value model by using mathematical method in view of deformation features of tunnel surrounding rocks, and continuously updates prediction model by using equi-dimension substitution method. Compared with traditional GM（1,1） model, the improved model has gained higher prediction accuracy and can better predict the actual deformation conditions and trends of surroundin~ rnek~
出处
《建筑技术》
北大核心
2017年第9期990-992,共3页
Architecture Technology
关键词
GM(1
1)模型
变形预测
等维替代
维数控制
GM（1,1） model
deformation prediction
equi-dimension substitution
dimension control
