ABSTRACT
Shell deformation when backfilling corrugated sheet (as well as precast concrete) objects is substantial and can be controlled using geodetic techniques. Typically, crown deflection is observed, which is subject to significant changes during the backfilling process. In the initial phase of the construction, the shell undergoes uplift followed by reduction. The paper analyses changes to the curvature radius as a function of vertical displacement of the shell crown. A characteristic graph is thus created to assess the safety of the shell both during construction and exploitation. The paper presents an algorithm of object safety assessment based on shell deformation. During construction, the forces in the shell are usually several times greater than those generated as a result of operational loads. Results of analyses presented in the paper are therefore significant also as a basis for calculation and behavior of the soil structure during operational loads.
