Very Deep Piling for The Highrise Zalmhaven I In Rotterdam (NL)-PPT Presentation

PPT Presentation

Pdf Summary

The document discusses foundation design and construction for high-rise buildings in Rotterdam, where soft clay and peat overlie sand layers. Conventional foundations can cause substantial settlement: examples include the Maastoren and De Rotterdam. Zalmhaven and the Post Office use extra-long, high-capacity pile foundations, with reported settlements of about 60 mm.<br /><br />Over time, load transfers from the upper sand layer to the deeper sand layer and pile tip, causing additional pile settlement. The proposed analysis approach is to model the behavior of a single pile, check it against design codes, and then include the other piles, foundation slab, and building loads. Calculated settlements are compared with measurements taken at building corners. The Zalmhaven analysis reports a maximum rotation of approximately 1:600.<br /><br />The document also describes XXL Tubex pile installation. These piles address deep bearing layers, very soft surface soils, high load requirements, and restrictions on vibration and noise near neighboring structures. Because equipment limits individual pile elements to about 42 m, piles are assembled from multiple sections. Installation uses steel casing, drilling fluid or grout, and concrete; a test pile is installed beforehand to assess drilling, grout use, and return flow. Monitoring and independent inspection are emphasized.<br /><br />Projects using the system include De Coopvaert, Calypso, CASA 400, AM4, Y-Towers, Cooltoren, and Zalmhaven, with De Post under construction. At Y-Towers, production exceeded the schedule of one pile per day, reaching an average of 1.2 piles per day. The presentation anticipates equipment and requirements for piles reaching 80 metres or more.

Keywords

high-rise foundations

Rotterdam

soft clay

peat

pile settlement

Zalmhaven

XXL Tubex piles

deep bearing layers

foundation design

construction monitoring