摘要
中贵天然气管道天水市段沿线地处黄土高原,地貌类型多样、构造活跃、复杂地质条件下发育多种具有隐蔽性和潜伏性的地质灾害,其中滑坡灾害对中贵天然气管道的安全危害极大,因此,对中贵天然气管道天水段沿线滑坡隐患进行有效识别与分析具有重要意义。采用Sentinel-1A升降轨卫星数据,基于时序合成孔径雷达干涉测量(synthetic aperture radar interferometry,InSAR)对中贵天然气天水段沿线滑坡隐患进行了解译识别、现场复核、发育特征与典型滑坡形变分析。研究区共识别17处滑坡隐患点,现场复核最终确定13处,其余4处为人类工程活动区,其中常沟村和磨峪沟村滑坡形变受降雨影响。统计发现研究区管道沿线滑坡多发生在坡度40°~50°,高差400~600 m,东北坡向和距管道100~150 m范围内,且岩土体强度较低,地层以第四系全新统冲洪积层(Q_(4)^(a1+p1))为主。结果表明:联合升降轨的时序InSAR技术可以有效识别管道沿线滑坡隐患,为油气管线的安全运营及今后油气管道选线提供重要的科学依据和参考。
The Tianshui section of the Zhongwei-Guiyang natural gas pipeline is located on the Loess Plateau,which is characterised by diverse geomorphological types,active tectonics,and complex geological conditions,and a variety of hidden and latent geological hazards.Sentinel-1A ascending and descending satellite data was used to decode and identify landslide hazards along the Tianshui section of the Zhongwei-Guiyang natural gas pipeline based on time-series synthetic aperture radar interferometry(InSAR),field review,development characteristics and typical landslide deformation analysis.A total of 17 landslide hazards were identified in the study area,13 of which were finally identified in the field review,while the remaining four were areas of human engineering activities,among which the landslide deformation in Changgou and Moyugu villages was affected by rainfall.It is found that most of the landslides along the pipeline in the study area occurs at slopes of 40°~50°,with a height difference of 400~600 m,within 100~150 m from the pipeline in the northeastern slope direction,and the geotechnical body is of low strength and the stratigraphy is dominated by Q_(4)^(a1+p1).The research results show that the time-series InSAR technology with combined lift and rail can effectively identify landslide hazards along the pipeline,providing an important scientific basis and reference for the safe operation of oil and gas pipelines and future oil and gas pipeline selection.
作者
方迎潮
王小松
蒋毅
顿佳伟
冯文凯
刘威
丁治文
张洋铭
FANG Ying-chao;WANG Xiao-song;JIANG Yi;DUN Jia-wei;FENG Wen-kai;LIU Wei;DING Zhi-wen;ZHANG Yang-ming(Key Laboratory of Mountain Hazards and Earth Surface Process,Chinese Academy of Sciences,Institute of Mountain Hazards and Environment,Chinese Academy of Sciences&Ministry of Water Conservancy,Chengdu 610041,China;University of Chinese Academy of Sciences,Beijing 100049,China;Pipe China Southwest Pipeline Co.,Ltd.,Chengdu 610041,China;Stata Key Laboratory of Geohazard Prevention and Geoenvironment Protection(Chengdu University of Technology),Chengdu 610051,China;PetroChina Southwest Oil&Gas Field Company Northwest Sichuan Gas Mine,Mianyang 621000,China)
出处
《科学技术与工程》
北大核心
2024年第4期1357-1369,共13页
Science Technology and Engineering
基金
国家自然科学基金(41977252)
四川省科技计划项目(2023NSFSC0376)
国家管网集团科技项目(WZXGL202106)。
关键词
中贵天然气管道天水市段
时序合成孔径雷达干涉测量(InSAR)
滑坡隐患识别
发育特征
Tianshui City section of the Zhongwei-Guiyang natural gas pipeline
time series synthetic aperture radar interferometry(InSAR)
landslide hazard identification
developmental characteristics
