Switzerland – Engineering design services for the construction of civil engineering works

The slope area of the "Mumpferflue" became a problem section in terms of stability during the 1970s due to the construction of the N03 national highway from the Augst junction to Birrfeld. Regular landslides of unconsolidated rock, influenced by pore water pressure and seasonal weather conditions, occur. Due to the importance of the area for traffic, continuous monitoring is carried out using inclinometer and piezometer tubes. In the event of sudden displacements or deformations in conjunction with precipitation, a rapid stabilization response would be necessary. To reduce the associated risks to the base of the slope, the SBB railway line, the national highway, and the cantonal road, technical measures to reduce movement and prevent a critical rise in the groundwater level must be defined and implemented within the framework of a project.