Westlink Projects â€“ Geotechnical Challenges During the Execution Phase-PPT Presentation

PPT Presentation

Pdf Summary

The Westlink is a new railway connection in Gothenburg involving works at Korsvägen, Liseberg, Kvarnberget, Haga and Centralen. Ground conditions included up to 26 metres of soft clay, locally quick clay, moraine with large boulders, weak weathered rock and strong bedrock.<br /><br />Construction took place close to railway tracks, highways and existing buildings, requiring track-safety measures, staff training and continuous movement monitoring. Other challenges included underground obstacles, unstable boreholes, cold-weather disruptions and strict limits on deformation and environmental impact.<br /><br />Keller carried out extensive deep soil mixing (DSM), jet grouting, rock grouting and uplift-anchor works. DSM activities included around 17,000 columns and multiple test fields; testing showed the 210 kPa shear-strength target was achieved even with 40 kg/m³ of binder. Jet-grouting projects required careful control of column strength, inclination, sealing and backflow, supported by specialized techniques and monitoring.<br /><br />The presentation highlights the importance of adapting methods and testing to complex ground conditions, while maintaining demanding safety and quality standards. It concludes that teamwork and cooperation among people with different backgrounds and experience were essential to project success.

Keywords

Westlink

Gothenburg

railway connection

Korsvägen

Liseberg

deep soil mixing

jet grouting

rock grouting

ground conditions

construction safety