ABSTRACT
The landslide “Bracin” was a calm phenomenon till the construction of E-75 motorway started 20 years ago. From then and onwards its activity was growing gradually and thus causing more and more complex problems which were culminating with the overall interruption of traffic along one carriage way in the course of January 1999. The landslide after its reactivation was the subject of investigations carried out in several stages and unsuccessful repairs. It was created within the neogene and quaternary sediments. The most relevant features are distinguished with rather small dimensions (the length being 220–230 m, with the width of approximately 110–160 m), yet with relatively great depth of 12.8 – 15.9 m). It is characterized by a great number of phases of distinct activities which brought about vast deformations within the head scarp zone, located within the motorway’s central reserve. In this way, the presentation of the results is being made as regards the most recent complex engineering-geologic investigations of landslides, which among other things encompassed as well the in-situ measurements (piezometers, inclinometers, surveying marks). In such a way, one was in a position to perceive the causes of landslide activation, its mechanism, properties et al. Altogether, this should provide for the permanent repair to be carried out.
RESUME: Le glissement “Bracin” était calme jusqu’à construction de la route internanionelle E-75, avant 20 anée. De ce temp son activité est de plus en plus grande et provoque les problèms qui culminent par un arrêtage total du trafic au démis de la route, a janvier 1999. Après cela, le glissement était plusieur fois le sujet de recherche et d’amelioration sens succès. Le glissement est formé sediments de Néogéne et Quaternaire, des dimensions petits (220–230 m de longeure, 110–160 m de largeure), mai avec grande profondeur, 12,8–15,9 m. Il est caracterisé par de nombreuses phases d’activation qui sont la cause de la grand déformation du glissement aux parties les plus hauttes. Ici sont présentés les résultats des nouvelles recherches géotechniques et quelques diferents mesurrements “in situ” (pièsometres, inclinometres, les points surveillants), aussi. Grâce è ceux donés, on était possible reconaitre l’origine d’activation du glissement, son mechanisme et caractéristiques ect. pour éxécution l’amelioration permanente, ici présentée.
