Crack in Concrete Lined Channels. Case Study

Between of 2011-2013, was performed the improvement of the Bahlui riverbed on the area where the river crosses city of Iasi. One of the works was the protection of the minor bed with reinforced concrete liner over a length of about 2.5 km. Shortly after the completion of the works, the reinforced concrete liner began to crack in certain sectors, in the contact area between the invert slab and the concrete revetment. The subject of the research is to analyze the causes of the cracks, which may be either in the design of the construction or in the execution of the works. Simple calculation methods were used as well as finite element method calculation using the latest hypotheses regarding the interaction between the concrete structure and the foundation ground.