摘要
针对沉降过程中的沉降加速度和冲击扰动项问题,该文改变以累计沉降量作为GM(1,1)模型建模数据的传统做法,提出了以沉降速度为建模数据的VGM(1,1)模型和基于缓冲算子的VGM(1,1)模型。通过分析基坑沉降量的预测结果,比较VGM(1,1)模型、基于缓冲算子的VGM(1,1)模型、基于缓冲算子的GM(1,1)模型以及GM(1,1)模型之间的精度变化。实验结果表明,VGM(1,1)模型以及基于缓冲算子的VGM(1,1)模型均可提高预测精度,基于缓冲算子的VGM(1,1)模型精度高于VGM(1,1)模型,冲击扰动项对预测值的影响程度大于沉降加速度对预测值的影响程度。
In view of the problem of sedimentation acceleration and the impact disturbance term during settlement,this paper changed traditional method of using cumulative settlement as modeling data of GM(1,1)model and put forward the VGM(1,1)model of using settlement velocity as modeling data and VGM(1,1)model based on buffer operator.The accuracy changes between VGM(1,1)model,VGM(1,1)model based on buffer operator,GM(1,1)model based on buffer operator and GM(1,1)model were compared by analyzing the prediction results of foundation pit settlement.The experimental results showed that VGM(1,1)model and VGM(1,1)model based on buffer operator could improve the prediction accuracy,the accuracy of VGM(1,1)model based on buffer operator was higher than that of the VGM(1,1)model and the influence of the impact disturbance term on the predicted value was greater than that of the settlement acceleration on the predicted value.
作者
王岩
田永明
刘守同
刘晓兵
WANG Yan;TIAN Yongming;LIU Shoutong;LIU Xiaobing(Jinan Geotechnical Investigation and Surveying Research Institute,Jinan 250013,China)
出处
《测绘科学》
CSCD
北大核心
2019年第2期38-42,共5页
Science of Surveying and Mapping
关键词
沉降速度
沉降加速度
冲击扰动项
累计沉降量
VGM(1
1)模型
缓冲算子
settlement velocity
settlement acceleration
impact disturbance term
cumulative settlement
VGM(1,1)model
buffer operator
