李春意, 贾彭真, 赵海良,等.南水北调中线渠首深挖方膨胀土渠段边坡形变时空演化规律分析[J].河南理工大学学报（自然科学版）,2023,42(6):76-85.

LI C Y, JIA P Z, ZHAO H L, et al.Spatiotemporal evolution of slope deformation law of deeply-excavated canal over the middle route of South-to-North Water Diversion Project[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(6):76-85.

南水北调中线渠首深挖方膨胀土渠段边坡形变时空演化规律分析

李春意1, 贾彭真1, 赵海良2, 魏磊2, 丁来中1,3, 韩博4

1.河南理工大学 测绘与国土信息工程学院，河南 焦作  454000;2.河南省地质矿产勘查开发局 测绘地理信息院，河南 郑州  450007;3.河南理工大学 自然资源部矿山时空信息与生态修复重点实验室，河南 焦作  454000;4.河南省岩石矿物测试中心，河南 郑州  450014

摘要:为研究渠首深挖方膨胀土渠段边坡形变规律，采用PS-InSAR和SBAS-InSAR融合的形变监测技术，处理2017-01-11—2019-12-27间88景Sentinel-1A升轨影像数据，获取并分析两岸渠段边坡的长时序形变速度和累计形变场，测试原状土体成分，分析地表形变与土体物理属性之间的相关性，讨论降雨对边坡形变的影响。结果表明：渠段边坡年平均形变速率为10~25 mm/a，最大累计形变量约60 mm，边坡总体处于抬升状态；试验区下位原状岩土层中膨胀土主要成分为伊利石，降雨作用下边坡出现反复抬升或下沉，形变峰值与丰水期降雨量密切相关，且呈一定滞后性，边坡形变的整体趋势可用渠段边坡形变量与时间之间的回归中线表征。

关键词:南水北调;边坡形变;时空演化规律;时序InSAR;膨胀土

doi:10.16186/j.cnki.1673-9787.2021100011

基金项目:国家自然科学基金资助项目（41671507，U1810203）；河南省青年骨干教师项目（2019GGJS059）；自然资源部矿山时空信息与生态修复重点实验室开放基金资助项目（KLM202303）；国网河南省电力公司科技项目（5217L0230004）；河南省自然资源厅科研项目（2023-6）；测绘科学与技术双一流学科创建项目（BZCG202301）

收稿日期:2021/10/08

修回日期:2021/12/31

出版日期:2023/11/25

Spatiotemporal evolution of slope deformation law of deeply-excavated canal over the middle route of South-to-North Water Diversion Project

LI Chunyi1, JIA Pengzhen1, ZHAO Hailiang2, WEI Lei2, DING Laizhong1,3, HAN Bo4

1.School of Surveying and Landing Information Engineering，Henan Polytechnic University，Jiaozuo  454000，Henan，China;2.Institute of Surveying Mapping and Geoinformation，Bureau of Geology and Mineral Exploration of Henan Province，Zhengzhou  450007，Henan，China;3.Key Laboratory of Mine Spatio-Temporal Information and Ecological Restoration，MNR，Henan Polytechnic University，Jiaozuo  454000，Henan，China;4.Test Center of Rocks Minerals of Henan Province，Zhengzhou  450014，Henan，China

Abstract:In order to study the deformation law of the expansive soil slope in the deeply-excavated canal，a deformation monitoring technology combining PS InSAR and SBAS InSAR was used to process 88 Sentinel-1A orbit elevation image data from January 11，2017 to December 27，2019.The long-term deformation velocity and cumulative deformation field of the slopes on both sides of the canal were obtained and analyzed，and the original soil composition was tested.The correlation between surface deformation and soil physical properties was analyzed，and the impact of rainfall on slope deformation was discussed.The results showed that the average annual deformation rate of the slope in the canal section was 10~25 mm/a，and the maximum cumulative deformation was about 60 mm.The overall slope was in an elevated state.The main component of expansive soil in the lower undisturbed rock and soil layer of the experimental area was illite.Under the influence of rainfall，the slope repeatedly rose or sank，and the peak deformation was closely related to the rainfall during the rainy season，with a certain lag.The overall trend of slope deformation can be characterized by the regression centerline between the slope shape variables in the canal section and time.

Key words:South-to-North Water Diversion Project;slope deformation;spatiotemporal evolution;time series InSAR;expansive soil

南水北调中线渠首深挖方膨胀...段边坡形变时空演化规律分析_李春意.pdf