Deformations of selected engineering structures and some reasons of its occurrence

In the paper the problem of lateral impact of weak soil layer on piles is discussed and analysed from the view point of measurements of deformations of structures founded on piles and of the prediction of its development in the future. Selected model test results are described and compared with numerical simulations. Additionally, basic principles of non-invasive electromagnetic method for measurement of deflection of abutments piles, developed by the author, is also presented.