Published on 26 September 2016
The article focuses on the construction of retaining walls to ensure safety on mountain roads during the development of mountain territories. It also examines protective structures, which are currently in use on the roads of Caucasus mountains. Special attention is paid to the effectiveness of their use on roads of South Ossetia, which are already constructed or are under construction, including Transkam and on the road Tskhinvali – Leningor.
Protective retaining walls are constructed to retain the unstable soil mass from collapse. In transport construction retaining walls are installed on steep slopes and slopes mainly for protection of roads and railways.
At present stage in conditions of the Caucasus one of the laid roads, as a result of omissions and mistakes in calculations of the project implementation, was not provided with the calculation of a base strength and the pressure force of zapazushnoy dirt mass brought the wall in a sloped condition, creating the risk of an emergency. Consequently, designed massive retaining wall came in an unstable condition, reducing the road safety.
Poorly constructed retaining walls instead of providing safe driving conditions create emergency situations, such aschunks or lumps of rocks, which jump over the retaining wall and fall on the roadway.
Detailed monitoring and analysis of operation of the retaining walls shows in certain conditions they were ineffective, as zapesochnaya space is filled with mass of wet soil, which pressures the wall and leads it to an unstable state. Parallel to this the possibility of harvesting of zapashny ground in a mechanized way is complicated, that is one of the main negative factors of protective retaining walls operation.
As a result of a survey of the operating conditions of retaining walls on mountain roads of the Caucasus we can conclude:
1. The use of retaining walls should be justified in technical, economic and environmental terms; the efficiency of road traffic safety is also very important.
2. Design of retaining walls, working in conjunction with the soils in the embankment subgrade and zapazushny space are technology-savvy, convenient and efficient in structural design, but their use should be considered from the point of view of their relevance in the safety and protection of roads from collapse of slope landslides, landslide-screes and other hazards.
Categories: Articles, Technical-and-Technological-Issues-of-SDMT
Tags: горные дороги, Обвально-осыпные явления, железобетонные подпорные стены, безопасность движения, эффективность работы подпорных стен.
ISSN 1998-4502 (Print) ISSN 2499-975Х (Online)