Analiza stabilnosti padina pored puteva u uslovima bioarmiranog zemljišta

Abstract

Korenov sistem ima sposobnost da stabilizuje padine, popravkom fizičko-mehaničkih osobina zemljišta na kojem se razvija. Morfologija i tendencija korenovog sistema da zbija čestice zemljišta u jednu monolitnu masu, koju nazivamo bio-armirano zemljište, doprinose povećanju otpornosti zemljišta na smicanje. U radu je prikazana uporedna analiza stabilnosti padina pored puteva bez i sa uticajem korenovog sistema. Analize su rađene u cilju zaštite saobraćajnica, pronalaženjem optimalnog oblika korenovog sistema kao alternativnog rešenja za stabilizaciju padina pored puteva. Na modelu padine simuliran je uticaj četiri grupa vegetacije, izdvojenih na osnovu morfologije korenovog sistema (tanjirast, srcast, sa izraženom srčanicom i nedefinisan oblik). Za svaku izabranu vrstu je usvojena vrednost kohezije "bio-armiranog" zemljišta (cr ). Softver za geotehničko numeričko modeliranje - GeoStudio 2007 je korišćen za sve analize stabilnosti padine. Proračunom stabilnosti modela padine bez uticaja vegetacije utvrđeno je da padina nije stabilna. Uvođenjem vegetacionih grupa u analizu stabilnosti postiže se povećanje stabilnosti padine. Najveći uticaj na stabilnost modela padine ima grupa 2.vegetacija koja ima koren sa izraženom srčanicom, sledi grupa 1.sa srcastim korenom, dok su grupa 3, tanjirasti koren, i grupa 4, nedefinisani oblik korenovog sistema, dale najmanje vrednosti. Prikazani rezultati predstavljaju doprinos u izboru rešenja za stabilizaciju padina pored puteva i sprečavanju erozionih procesa.

Root system has ability to stabilize slopes, improving physical and mechanical properties of soil on which it develops. Morphology and tendency of root system to compose soil particles into one monolithic mass, which we call bio-reinforced soil, contribute to increasing the resistance of soil to shearing. In this paper, is presents a comparative analysis of slope stability along roads without and with the influence of root system. The analyzes were made for the needs of defense of roads, finding most optimal types of root system as an alternative solution for stabilization of the slopes along roads. On the slope model was simulated influence of four groups of vegetation, based on morphology of root system (plate, heart, tap and undefined). For each selected species, value of root cohesion (cr ) has been adopted. Software for geotechnical numerical modeling-GeoStudio 2007, was used for all slope stability analyzes. Analyzing stability of the slope model without influence of vegetation, slope is unstable. By calculating stability of slope model with vegetation groups, an increase in stability of the slope model is achieved. The greatest influence on stability of the slope model has group 2.vegetation with a tap root system, followed by group 1. - with a heart root, while group 3, plate root, and group 4, undefined types of root system, gave at least the values. The results from this paper, represent a contribution to choice of solutions for stabilization of slopes along roads and the prevention of erosion processes.