Anchored Retaining Wall Lärchberg

Project objectives

Geotechnical investigation and assessment of the stability of a 30-yearold, anchored retaining wall on the B 178 Loferer Straße.

Project description

In the area of the B178 in Lofer, east of the Lärchberg tunnel, there is an anchored retaining wall over a length of approximately 765 m. This structure is shored by a stone wall in front of it and is therefore neither accessible nor monitored. The investigated section of the road and the anchored retaining wall lies entirely within a large landslide mass consisting of a highly heterogeneous mixture of boulders and fine-grained sediments. To assess the necessity of rehabilitation, monitoring, or additional exploration measures, a geotechnical assessment of the stability of the existing structure was carried out based on existing data in coordination with the geological service of the Salzburg Provincial Government.

Project data

• Total length of the anchored retaining wall: approx. 765 m
• Prestressed anchors: 400 U, length: 20 - 25 m, preload force: 600 kN
• Road cut height: approx. 6 m

Services

• Geotechnical investigation
• Stability calculations
• Expert opinion and consulting