Инженерная защита опор эстакад на оползневых склонах города Сочи

Abstract

The need for construction at arduous mountainous areas with difficult engineering-geological conditions on landslide slopes has appeared due to the expansion and increase in transport infrastructure of the city of Sochi in the course of preparation for the 2014 Olympic Games and also with the development of new land sites. The construction of transport trestles is often only possible option of highways building at the mountain areas. However, ensuring their safe operation at landslide slopes requires building the protective constructions. At the same time, the measures of active protection against landslide deformations (which are completely bearing the landslide mass) often are very costly. The known methods determine considerable errors when designing landslide protection constructions owing to the simplifications and assumptions accepted in them. Safety and reliability of work for such designs at the same time is provided by acceptance of high coefficients of an inventory. It leads to increase in a material capacity, labor input of building the protective constructions and decrease in their cost efficiency. The settlement scheme for streamline construction is implemented in the geotechnical program complex Plaxis is developed for building cost-efficient protective constructions on the pile basis and also the methods of their calculation is optimized. The optimal constructive solution of streamline protective constructions on landslide slopes is developed from such conditions: not occurring breakdowns of soil in interpile space, an identical load of all pile elements among the row; the decrease of pressure applied to the construction. Results of numerical experiments for soil interaction with streamline pile constructions have been used in designing protective constructions for essential geotechnical objects of Krasnodar region. Researches results have received display in industry road documents IRD 218.2.050-2015 и IRD 218.2.033-2013.