of Cyclic Statnamic Testing in the Netherlands"
P. Middendorp, Profound
R.J. van Foeken, TNO Building and Construction
International Statnamic Seminar, Tokyo, 1998
The Dutch company Jacbo has
applied a new type of auger pile, the Jac-O pile, in the Netherlands. The
Jac-O pile is based on an auger system that pushes most of the soil away (50
to 70%) instead of removing the soil. The Dutch Geotechnical Code only
considers piles with soil removal and piles without soil removal, so
standard design rules were not applicable. To allow the application of the
Jac-O pile, a control method based on CPT testing was introduced. CPT tests
performed before pile installation were compared with CPT tests performed
after pile installation. On the Arnhem site, the CPT results before and
after pile installation showed reduction in cone resistance values. The
bearing capacity of the piles was checked by Statnamic cyclic load testing.