南水北调中线湿陷性黄土区InSAR时序分析  

Analysis on InSAR time series of collapsible loess area in Huixian section of Middle Route Project of South-to-North Water Diversion

作　　者：刘朋俊[1] 张璐[2] 陈元申[1] 刘豪杰[1] LIU Pengjun;ZHANG Lu;CHEN Yuanshen;LIU Haojie(Yellow River Engineering Consulting Co.Ltd,Zhengzhou 450003,China;School of Geomatics,Xi’an University of Technology,Xi an 710054,China)

机构地区：[1]黄河勘测规划设计有限公司,河南郑州450003 [2]西安科技大学测绘与科学技术学院,陕西西安710054

出　　处：《人民长江》2020年第6期125-128,205,共5页Yangtze River

基　　金：国家重点研发计划项目“南水北调工程运行安全安全检测技术研究与示范”(2018YFC0406904)。

摘　　要：近年来,合成孔径雷达干涉测量迅速发展成为一种新型的大地测量技术,具有全天候、全天时、监测精度高和范围大等优点,为线性工程基础稳定性的形变监测风险评估提供了技术支持。以南水北调中线工程辉县段湿陷性黄土地质区为研究对象,选取研究区内2015年4月至2019年3月获取的90景Sentinel-1A数据,利用时序InSAR技术提取了该湿陷性黄土特殊地质区的年平均形变速率和时间序列信息,分析了区域内沉降量与降雨量及土壤湿度的相关性,获得了区域内沉降时空演变特征。相关成果为南水北调干渠基础不稳定治理提供了科学依据。In recent years,synthetic aperture radar interferometry has been rapidly developed as a new type of space geodetic technology,which has the advantages of all-weather,all-day wide range monitoring with high precision,which can provide technical support for deformation monitoring of foundation stability in linear engineering.Focusing on collapsible loess geological area in Huixian section of the South-to-North Water Transfer Project,we collected 90 scenes of Sentinel-1A in the study area from April 2015 to March 2019.We used the time series InSAR technology to extract time series of deformation and derive the annual average deformation rate.Based on the data,we studied the correlation of subsidence with soil moisture and the rainfall amount.As a result,the spatial-temporal evolution characteristics of subsidence in the region are obtained.The study can provide scientific basis for the foundation instability harnessing of the main channel of the South-to-North Water Transfer Project.

关 键 词：湿陷性黄土 线性工程 平均形变速率 时序InSAR 

分 类 号：P642[天文地球—工程地质学]