非等间距改进灰色模型在基坑变形预测中的应用
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摘要
基坑受开挖和人为因素的影响会在短时间内发生较大形变,现有的非等间距灰色模型不能识别处理突变数据,导致其在基坑中适用性低,精度较差。针对这种情况,本文提出了基于改进赋权处理的动态灰色模型和基于小波等距处理的动态灰色模型,结合工程实例,计算结果表明,这两种改进方法克服了现有模型的缺陷,降低了观测序列中含有的较多突变数据的影响,在基坑工程中变形监测的分析预报有较好的结果。
The foundation pits will suffer large deformation in a short time due to the influence of excavation and human factors.Existing non-equidistance gray model is unable to handle mutation data,which leads to the low applicability and poor precision in the foundation pits.In view of this situation,this paper proposes two improved models,Dynamic gray model based on improved weighting and Dynamic gray model based on wavelet equidistance.The calculation results of the engineering examples show that these two improved models can overcome the defects of the existing model,reduce the influence of many mutation data in the observation sequence,and function better in the analysis and prediction of foundation pits engineering deformation monitoring.
The foundation pits will suffer large deformation in a short time due to the influence of excavation and human factors.Existing non-equidistance gray model is unable to handle mutation data,which leads to the low applicability and poor precision in the foundation pits.In view of this situation,this paper proposes two improved models,Dynamic gray model based on improved weighting and Dynamic gray model based on wavelet equidistance.The calculation results of the engineering examples show that these two improved models can overcome the defects of the existing model,reduce the influence of many mutation data in the observation sequence,and function better in the analysis and prediction of foundation pits engineering deformation monitoring.
引文
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[4]梁永平,严丽萍.基于小波消噪的动态灰色桥墩沉降预测模型[J].测绘地理信息,2017,42(6):65-68
[5]朱军桃,李亚威等.建筑物沉降监测中的改进灰色模型[J].测绘科学,2017,42(11):85-91
[6]陈鹏宇.非等距GM(1,1)模型在沉降预测中的应用探讨[J].大地测量与地球动力学,2017,37(7):709-714
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[8]康超,黄声享,李洋洋.小波去噪和新陈代谢GM(1,1)相结合应用于变形预报[J].测绘地理信息,2015,40(6):46-48
[9]魏玉明,党星海,杨鹏源,等.加权GM(1,1)模型在变形监测中的应用研究[J].工程勘察,2012,40(4):82-84
[10]彭振斌,张闯,彭文祥,等.GM(1,1)模型背景值构造的不同方法与应用[J].东北大学学报(自然科学版),2017,38(6):869-873
[2]王穗辉.误差理论与测量平差[M].上海:同济大学出版社,2010
[3]尹晖,周晓庆,张晓鸣.非等间距GM(1,1)建模方法对比分析及应用[J].测绘工程,2017,26(2):1-4
[4]梁永平,严丽萍.基于小波消噪的动态灰色桥墩沉降预测模型[J].测绘地理信息,2017,42(6):65-68
[5]朱军桃,李亚威等.建筑物沉降监测中的改进灰色模型[J].测绘科学,2017,42(11):85-91
[6]陈鹏宇.非等距GM(1,1)模型在沉降预测中的应用探讨[J].大地测量与地球动力学,2017,37(7):709-714
[7]张冬菊,黄声享.基于整体最小二乘的灰色模型在大坝变形分析中的应用[J].工程勘察,2017(12):55-59
[8]康超,黄声享,李洋洋.小波去噪和新陈代谢GM(1,1)相结合应用于变形预报[J].测绘地理信息,2015,40(6):46-48
[9]魏玉明,党星海,杨鹏源,等.加权GM(1,1)模型在变形监测中的应用研究[J].工程勘察,2012,40(4):82-84
[10]彭振斌,张闯,彭文祥,等.GM(1,1)模型背景值构造的不同方法与应用[J].东北大学学报(自然科学版),2017,38(6):869-873