Soil - Structure Interaction at the Bogatići Landslide in Bosnia and Herzegovina

Abstract

Movement of sliding mass, also known as the mechanism of sliding, is very complex. It is possible to observe the products of movement, i.e. displacements and deformations in the landslide body. In addition, displacements and deformations have an impact on artificial structures. The soil-structure interaction in landslide body has to be understood, whether we decide to save the existing structure or to design a new one.

In this paper, the observation of displacements, deformations and soil-structure interaction at the landslide Bogatići is presented. The structure of hydro-power dam was exposed to the passive pressure of sliding mass, while the retaining structures have been overturned as a result. A geological fault was the barrier to the sliding. The Bogatići landslide is about 1400 m long and from 80 to 100 m wide. It spreads up to 300 m in the foot. Sliding surface is about 10 to 15 m deep in the upper part and up to 30 m in the foot. Activation of the landslide occurred in May 2010 after a period of heavy rainfall. Reactivation of the landslide occurred in June 2011 due to heavy rainfall again.

Transport of sliding mass has been characterized by “push-pull” system. Reduction of strength in the foot and the secondary overload produce secondary sliding. The paper analyses different types of soil-structure interactions. Research results are to improve methodology of structure remediation.