Non-uniform land subsidence can cause subgrade deformation and threaten the safety of linear projects such as high-speed railways. The Lunan high-speed railway is taken as the research background. Combined with the hydrogeological and engineering geological conditions, the regional land subsidence is analyzed by the combined method of the differential interferometric synthetic aperture radar (D-InSAR) and small baseline subset interferometric synthetic aperture radar (SBAS-InSAR), which is verified by using precise leveling and GPS monitoring data. The accurate land subsidence analysis of large-scale linear engineering is realized. The distribution situation and change laws of land subsidence in linear engineering areas are revealed. Then, a three-dimensional coupled numerical model of land subsidence along a large-scale linear project is established by using the finite difference method. The spatial distribution characteristics of land subsidence in the linear engineering area are quantitatively analyzed and predicted. The main factors affecting land subsidence and the degree of land subsidence are discussed while keeping the pumping rate constant. The results show that: 1) The combined method of D-InSAR and SBAS-InSAR has high accuracy in the land subsidence monitoring of linear engineering. 2) There are five non-uniform settlement funnels along the Lunan high-speed railway. The groundwater over-extraction and coal mining are the main reasons for the land subsidence. 3) Realizing water source conversion and reduce groundwater exploitation are the main factors in linear engineering areas as soon as possible.

不均匀的地面沉降会引起路基变形，并威胁到诸如高速铁路等线性项目的安全。以鲁南高铁为研究背景。结合水文地质和工程地质条件，采用差分干涉合成孔径雷达（D-InSAR）与小基线子集干涉合成孔径雷达（SBAS-InSAR）相结合的方法，对区域地面沉降进行了分析。精确的水准和GPS监控数据。实现了大规模线性工程的精确地面沉降分析。揭示了线性工程区地面沉降的分布情况和变化规律。然后，利用有限差分法建立了大型线性工程地面沉降的三维耦合数值模型。定量分析和预测了线性工程区地面沉降的空间分布特征。在保持抽水速率恒定的同时，讨论了影响地面沉降和地面沉降程度的主要因素。结果表明：1）D-InSAR和SBAS-InSAR相结合的方法在线性工程地面沉降监测中具有较高的精度。2）鲁南高铁沿线有五个不均匀的沉降漏斗。地下水超采和煤矿开采是造成地面沉降的主要原因。