Application of Simple Additive Weighting Method for Selection of Appropriate Measures in the Rehabilitation of the Landslide

Abstract

Changeable climatic conditions, a large amount of precipitation in a short period, as well as the complexity of the terrain structure can affect the occurrence of landslides in many areas. The paper deals with the problem of landslide rehabilitation on the regional road Stolice - Krupanj, which arose as a result of the steep slope, soil water saturation, and traffic loads. The technical measures for rehabilitating landslides that have been analyzed are: concrete retaining wall, gabion retaining wall, and geogrid. Slope stability analyses with applied technical measures were performed in the GEO5 program. All technical measures have increased the stability of the slope. The final decision about the appropriate solution was made after ranking all alternatives and applying the Simple Additive Weighting (SAW) method. This Multi-criteria decision analysis method is used to find the sum of the weighted performance rating for each alternative on all criteria. The criteria used for the analysis are: С1 – Construction costs, С2 – Fitting into the environment, С3 – Lifetime of the object, С4 – Susceptibility to damage. The application of the SAW method also requires determining the weight of the criteria and for this was used Rank sum method. As a result of the application of the multi-criteria decision analysis method, the use of geogrid proved to be the best solution to prevent damage caused by landslides.