库区滑坡治理效果分析及堵河预测基于SBAS-InSAR和离散方法  

Analysis of Landslide Remediation Effectiveness and River Blocking Prediction Based on SBAS-InSAR and Discrefe Element Method

作　　者：王志强 段诚仕 陈泽公 Wang Zhiqiang;Duan Chengshi;Chen Zegong(The First Engineering Company of ccee Fourth Harbor Engineering Co.,Ltd.,Guangzhou 510450,China;CCCC Fourth Harbor Engineering Institute Co.,Ltd.,Guangzhou 510230,China;Key Laboratory of Environment and Safety Technology of Transportation Infrastructure Engineering,CCCC,Guangzhou 510231,China)

机构地区：[1]中交四航局第一工程有限公司,广州510450 [2]中交四航工程研究院有限公司,广州510230 [3]中交集团交通基础工程环保与安全重点实验室,广州510230

出　　处：《科技通报》2025年第4期112-122,共11页Bulletin of Science and Technology

基　　金：中交第四航务工程局有限公司产学研科技项目(2020-01)。

摘　　要：重庆市万州区长江二桥至驸马大桥北滨大道延伸段库岸多处滑坡隐患已进行了综合整治,对滑坡开展完善的监测工作以评价治理效果至关重要,本文以该区域3处典型滑坡为研究对象,利用短基线干涉合成孔经雷达(SBAS-InSAR)技术分析滑坡在2018—2019年(治理前)和2023—2024年(治理后)的形变速率(line-of-sight,LOS方向),随后应用离散元法对仍有较大形变的滑坡进行了堵河预测。研究结果表明:(1)四炮台滑坡前缘道路施工的反复压实+抗滑桩支护明显阻止了滑坡后缘沉降形变趋势;(2)下坪滑坡在2023—2024年形变速率降为-34.20~27.63 mm/a,滑体前缘右侧的强形变区治理效果明显,治理工程抑制了滑坡前缘受库水作用的土体力学性质劣化引发的形变;(3)乳品公司滑坡经过治理后形变速率为-45.92~25.52 mm/a,已减少了一定的形变趋势,但在滑坡前缘仍然有较为连续贯通的形变区,仍有可能发生牵引式破坏;(4)通过模拟预测了乳品公司滑坡失稳后堆积面积为16.72×10^(4)m^(2),最大厚度达18.06 m,易对恒太河造成堵塞,影响周边住户生命财产安全。以上研究成果可为滑坡治理工程效果评价提供一定技术参考。The landslide hazards along the riverbank section from the Second Yangtze River Bridge to Fuma Bridge on the North Riverside Avenue extension in Wanzhou District,Chongqing,have been comprehensively remediated.Conducting detailed monitoring of the landslides is crucial for evaluating the effectiveness of these mitigation measures.This study focuses on three typical landslides in the region,using SBAS-InSAR technology to analyze the landslide deformation rates in the line-of-sight(LOS) direction from 2018 to 2019(before treatment) and from 2023 to2024(after treatment).Subsequently,the Discrete Element Method(DEM) was applied to predict the potential blockage of rivers due to the ongoing deformation in certain landslide areas.The results show:(1) The repeated compaction of the road construction at the front of the Sipaotai landslide,coupled with the anti-sliding pile support,significantly halted the downward settlement trend at the rear of the landslide.(2) The deformation rate at the Xiaping landslide decreased to-34.20 to 27.63 mm/a in 2023—2024,with a marked reduction in deformation in the strong deformation zone on the right side of the landslide's front.The mitigation measures effectively prevented the deterioration of the soil' s mechanical properties caused by the reservoir' s water influence at the front of the landslide.(3)The deformation rate at the Rupin Company landslide after treatment ranged from-45.92 to 25.52 mm/a,showing a reduction in deformation,but a continuous deformation zone still exists at the landslide's front,indicating the potential for a traction-type failure.(4) Simulations predicted that the potential failure of the Rupin Company landslide could result in an accumulation area of 16.72 × 10^(4)m^(2),with a maximum thickness of 18.06 m,which could easily block the Hengtai River and pose a risk to the safety of surrounding residents.These findings provide valuable technical reference for evaluating the effectiveness of landslide mitigation engineering.

关 键 词：短基线干涉合成孔径雷达 离散元法 时序形变 治理效果 堵河预测 

分 类 号：X43[环境科学与工程—灾害防治]