ABSTRACT
In Barendrecht, the Netherlands, Van Hattum & Blankevoort and HBG are constructing the crossing between the High Speed Railway Link and the A15 motorway (2 × 6 lanes). This intersection is characterised by a close passing of rail tracks and foundations of the abutment, stringent demands on displacements and restricted space for construction. The ground conditions at site can be characterised as very soft soil. For this project, various soil improvement and foundation techniques are being used such as hard gel injection, grout anchoring, sheet-pile walls collaborating with jet grouting columns, jet grouting props and reinforced jet grouting columns. Because of little experience in jet grouting in soft, cohesive soils and peat, an extensive trial was carried out with 26 columns. This paper handles about the implementation of the results of the trial, the monitoring results (displacements) and the construction method in conjunction with the restricted space.
