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In the case of road routes in natural and urban environments, a problem arises with a weak foundation at the boundaries of the easement of the facilities. The weak foundation is in the form of landslides, unstable varieties and ravines on which an embankment is built. In an urban environment, the weak base usually covers a much wider area than the easement of the roadways and streets to be strengthened. In order to avoid stabilization of the entire affected city infrastructure and to limit the strengthening activi...

The problem is actual when slope stabilizations are implemented, when the strengthening systems and re-slopes cannot secure road traffic. There are three main reasons for the problem: climate changes, insufficient funds for strengthened infrastructure and implementation by companies without experience in geotechnical construction. A half-tunnel is used in the presence of a retaining wall, which needs to be integrated into the structure of the new facility. For environmental reasons and traffic safety requirements,...