CAJ | 학술논문

利用高分辨率InSAR时序分析技术研究了上海地铁10号线建设和运营期地面沉降的时空变化特征。结果表明：上海软土地基中的地铁沉降表现出如下特征：（1）线路区间隧道沉降量较大，而车站沉降量较小，沿线路方向沉降较为均匀；（2）线路两侧的沉降影响范围基本对称，5mm沉降的影响半径为100-150m；（3）线路纵向呈现沉降槽，最大沉降量位于纵向剖面中心，达10-15mm，影响范围为50-100m；（4）线路沉降具有阶段性，主要沉降发生在建设期，运营初期沉降速率有所增加。上述沉降效应表明高分辨率InSAR技术可从空间上完整表现地铁线上沉降的分布特征，从时间上揭示施工和运营阶段地面沉降的变化特征，对于地铁开挖施工期间和竣工运营期间的沉降监测具有显著意义。
이용고분변솔InSAR시서분석기술연구료상해지철10호선건설화운영기지면침강적시공변화특정。결과표명：상해연토지기중적지철침강표현출여하특정：（1）선로구간수도침강량교대，이차참침강량교소，연선로방향침강교위균균；（2）선로량측적침강영향범위기본대칭，5mm침강적영향반경위100-150m；（3）선로종향정현침강조，최대침강량위우종향부면중심，체10-15mm，영향범위위50-100m；（4）선로침강구유계단성，주요침강발생재건설기，운영초기침강속솔유소증가。상술침강효응표명고분변솔InSAR기술가종공간상완정표현지철선상침강적분포특정，종시간상게시시공화운영계단지면침강적변화특정，대우지철개알시공기간화준공운영기간적침강감측구유현저의의。
This paper studies the impact of subsidence along Shanghai Metro line 10 during its construction and operation based on high-resolution interferometric synthetic aperture radar （InSAR） time series analysis. The monitoring of subsidence along Metro line 10 provides a detailed description of tunneling subsidence over Shanghai＆#39;s unusual soft soil foundations. Our main ifndings were as fol ows. （1） The magnitude of land subsidence caused by tunneling over metro lines is higher than that over the stations, but changes little along the metro line. （2） Subsidence on both sides of the metro line is symmetrical, and the zone showing 5 mm of subsidence is within a range of 100-150 m. （3） Subsidence occurs across the metro line, and the maximum subsidence is up to 15 mm in the central groove with a width of 50-100 m. （4） The major contribution to the total amount of subsidence over the metro line occurs during construction, and the subsidence rate may show a slight increase during initial operation. This work demonstrates the usefulness of high-resolution InSAR for monitoring subsidence along urban metro lines, and its ability to provide spatial detail when describing the distribution of subsidence over the metro line and also to identify temporal changes in the subsidence rate during construction and operation.