The Austrian standard ONR 24810, 2020 regulates the effects of actions, design, construction, monitoring and maintenance of rockfall protection embankments. This standard describes the design concept and the constructions in detail. The basic principles are based on the research results of Hofmann & Mölk, 2012, Hofmann et al., 2013, Hofmann et al., 2017 and Hofmann et al., 2020. The constructions are differentiated into five types depending on the front facing and the geosynthetic reinforcement (Table 2). Type I refers to embankments without...
In recent years, the village of Colsano in the Venosta Valley has witnessed the recurring phenomenon of rock mass collapse. Large blocks from past landslides are still visible on the edge of the valley. The investigation has brought to light the presence of a strongly disintegrated rocky ridge, within a larger and more complex area, strongly disturbed by the presence of a Deep-Seated Gravitational Deformation of the Slope (DSGSD) still studied and examined in depth. The analysis of the kinematisms, in addition to the geological and geomechanical...
Crossing hydrogeological and ecological sensitive aquifers, water ingress can occur, which can lead to irreversible damage to hydrogeological and ecological systems. In order to avoid this, the rock mass surrounding these hydrogeological sensitive tunnel sections is sealed by injections to reduce the hydraulic permeability, the water inflows and consequently the regional water level drawdowns. In deep tunnels, complete sealing is not possible due to the high water pressures.
Residual water volumes will continue to enter the tunnel. The magnitude...
Residual water volumes will continue to enter the tunnel. The magnitude...
This paper illustrates the geological-technical problems encountered in the design and construction of the Küchelberg road tunnel, which constitutes the second completion lot of the Merano bypass in the province of Bolzano, and in particular the characteristics of the specifically developed monitoring system. The tunnel layout runs in an urban environment with low overburden for approximately 2 km in two clearly distinct geological conditions that affect approximately 50% of the tunnel: the Merano side (west) in alluvial soils, the Passirio side...
The area known as ‘delle roccette’ on the Tonale and Mendola Road shortly after Passo Mendola is subject to rockfall, avalanche and debris flow events. To mitigate risks derived from natural hazards, structural and non-structural mitigation measures have been adopted, such as the establishment of an avalanche commission to provide decision-making support to the Road Service. The evaluation of both efficiency and effectiveness of the measures taken, has been validated by the degree of acceptability of residual risk of human life loss before...
