The aim of this paper is to demonstrate how the integration of differential interferometric synthetic aperture radar (D-InSAR) and levelling improves the monitoring of ground deformation phenomena, thereby enabling their complete understanding. The complementarity between D-InSAR and levelling is illustrated through a case study of the construction of a road tunnel beneath Glòries Square, Barcelona; D-InSAR is employed to continuously monitor the works, notably the dewatering of the site. This study focuses primarily on D-InSAR data obtained from the processing of Sentinel-1A data following a persistent scatterer interferometry procedure. The spatial distribution of the deformation and its temporal evolution are analysed with detailed hydrogeological and piezometric data. The magnitude of deformation is discussed using levelling data and an analytical estimation based on the hydromechanical parameters of the ground obtained from a pre-existing hydrogeological numerical model and pumping tests. The D-InSAR results are shown to be essential for identifying the origin of ground deformation and the constraints on its spread. Such observations at the construction site and district (~2 km radius) scales with sub-centimetric deformation are precious contributions of D-InSAR data, whereas levelling offers a more accurate quantification of the deformation, although this remains an open issue to be further investigated.

本文的目的是演示差分干涉式合成孔径雷达（D-InSAR）和水准仪的集成如何改善对地面变形现象的监测，从而使他们全面理解。D-InSAR和水平仪之间的互补性通过对巴塞罗那Glòries广场下方的公路隧道建设的案例研究得以说明。D-InSAR被用来连续监测工程，特别是现场的脱水。这项研究主要关注通过持续散射干涉测量程序从Sentinel-1A数据处理中获得的D-InSAR数据。利用详细的水文地质和测压数据分析了变形的空间分布及其时间演化。使用找平数据和基于从现有水文地质数值模型和抽水试验获得的地面水力学参数的分析估计值，讨论了变形的大小。事实证明，D-InSAR结果对于识别地面变形的起源及其扩展的约束至关重要。D-InSAR数据在施工现场和区域（半径约2 km）具有亚重心变形的观测值是D-InSAR数据的宝贵贡献，而水准测量则可以更准确地量化变形，尽管这仍然是一个有待进一步研究的开放问题。事实证明，D-InSAR结果对于识别地面变形的起源及其扩展的约束至关重要。D-InSAR数据在施工现场和区域（半径约2 km）具有亚重心变形的观测值是D-InSAR数据的宝贵贡献，而水准测量则可以更准确地量化变形，尽管这仍然是一个有待进一步研究的开放问题。事实证明，D-InSAR结果对于识别地面变形的起源及其扩展的约束至关重要。D-InSAR数据在施工现场和区域（半径约2 km）具有亚重心变形的观测值是D-InSAR数据的宝贵贡献，而水准测量则可以更准确地量化变形，尽管这仍然是一个有待进一步研究的开放问题。