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A platform for research: civil engineering, architecture and urbanism
Method for judging thaw collapse grade of highway subgrade in permafrost region based on InSAR technology
The invention discloses a method for judging the thaw collapse grade of a roadbed in a permafrost region based on an InSAR technology. The method comprises the following steps: acquiring SAR data and auxiliary data of a road section of which the thaw collapse grade needs to be judged; the SAR data and the auxiliary data are preprocessed; performing differential interference calculation on the preprocessed data to obtain a phase-wound differential interference pattern; linear deformation phase estimation of time and space domains is carried out on the differential interferometric phase of the interferogram; subgrade deformation quantity calculation based on the InSAR technology is carried out; according to the roadbed deformation value, a road section overall deformation curve and a deformation curve changing along with time are established; according to the overall deformation curve of the road section and the deformation curve changing along with time, the roadbed thaw collapse grade of the monitored road section is judged. Original outdoor field surveying and mapping operation can be replaced, the working efficiency is improved, large-range, high-precision and high-resolution roadbed deformation conditions can be provided, and great engineering application significance is achieved for roadbed thaw collapse damage monitoring and prediction in plateau permafrost regions.
本发明公开了基于InSAR技术对多年冻土地区路基融沉等级判定的方法，包括：获取需要判断融沉等级的路段的SAR数据和辅助数据；对SAR数据和辅助数据进行预处理；将经过预处理后的数据进行差分干涉计算，得到相位缠绕的差分干涉图；对干涉图的差分干涉相位进行时间和空间域的线性形变相位估计；进行基于InSAR技术的路基形变量计算；根据路基形变值，建立路段整体形变曲线和随时间变化的形变曲线；根据路段整体形变曲线和随时间变化的形变曲线，对监测路段的路基融沉等级进行判定。本发明可代替原本的户外现场测绘作业，提高工作效率，并能够提供大范围、高精度、高分辨率的路基形变情况，对高原多年冻土地区的路基融沉损坏监测、预测都有很大工程应用意义。
Method for judging thaw collapse grade of highway subgrade in permafrost region based on InSAR technology
The invention discloses a method for judging the thaw collapse grade of a roadbed in a permafrost region based on an InSAR technology. The method comprises the following steps: acquiring SAR data and auxiliary data of a road section of which the thaw collapse grade needs to be judged; the SAR data and the auxiliary data are preprocessed; performing differential interference calculation on the preprocessed data to obtain a phase-wound differential interference pattern; linear deformation phase estimation of time and space domains is carried out on the differential interferometric phase of the interferogram; subgrade deformation quantity calculation based on the InSAR technology is carried out; according to the roadbed deformation value, a road section overall deformation curve and a deformation curve changing along with time are established; according to the overall deformation curve of the road section and the deformation curve changing along with time, the roadbed thaw collapse grade of the monitored road section is judged. Original outdoor field surveying and mapping operation can be replaced, the working efficiency is improved, large-range, high-precision and high-resolution roadbed deformation conditions can be provided, and great engineering application significance is achieved for roadbed thaw collapse damage monitoring and prediction in plateau permafrost regions.
本发明公开了基于InSAR技术对多年冻土地区路基融沉等级判定的方法，包括：获取需要判断融沉等级的路段的SAR数据和辅助数据；对SAR数据和辅助数据进行预处理；将经过预处理后的数据进行差分干涉计算，得到相位缠绕的差分干涉图；对干涉图的差分干涉相位进行时间和空间域的线性形变相位估计；进行基于InSAR技术的路基形变量计算；根据路基形变值，建立路段整体形变曲线和随时间变化的形变曲线；根据路段整体形变曲线和随时间变化的形变曲线，对监测路段的路基融沉等级进行判定。本发明可代替原本的户外现场测绘作业，提高工作效率，并能够提供大范围、高精度、高分辨率的路基形变情况，对高原多年冻土地区的路基融沉损坏监测、预测都有很大工程应用意义。
Method for judging thaw collapse grade of highway subgrade in permafrost region based on InSAR technology
基于InSAR技术对多年冻土地区公路路基融沉等级判定的方法
ZHONG WENHUA (author) / FANG LEI (author) / CHENG JUNQIN (author) / CHEN HONGWEI (author) / HU XUYAN (author) / ZHOU JIANHUA (author) / ABURAKAWA SHU (author)
2024-04-12
Patent
Electronic Resource
Chinese
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