Comparison and analysis of forecasts of a numerical model of soil behaviour around an implemented investment and results of geodetic monitoring

Surveying measurements, together with accuracy of elevation determinations, which may be currently achieved, remain the more reliable source of information concerning displacements of soils and foundations of buildings located close to newly constructed structures. A numerical model, which is used to forecast such displacements, should be verified basing on surveying monitoring. The paper presents comparison and analysis of results of surveying monitoring and forecasts of displacements, calculated basing on numerical modelling for a building located within an urban, densely built-up area, within direct neighbourhood of tunnels of the Warsaw underground railway. Results of 7 surveying control measurements: 4 in the period of implementation, 1 – in the period of post-implementation approval and 3 after completion of construction (6 and 10 months), were analysed. Guidelines concerning verification of the numerical model have been presented.