Proceedings - Fifth International Conference & Exhibition on Piling and Deep Foundations, 1994, Bruges, Belgium, (DFI)
Foundation of a 50,000 ton sugar silo on CFA-piles
H. Eriksson, w. Rankka & L. Jendeby
For the foundaiton of a new sugar silo for the Ortofta Sugar plant, environmental effects such as vibrations and settlements of neighbouring buildings were governing the choice of piling method. The tenders contained customary Swedish foundation methods such as driven precast piles, compensated piling and various types of bored piles. The client appreciated the advantages of the so-called CFA-pile. This was the first time this deep foundation method was used in Sweden. In order to fully control the quality of the piles and the function of the silo, static loading tests, dynamic testing, low-strain test and measurements of force and movement distribution after completion of the silo were/will be performed in addition to the conventional control program. The concrete quality of the piles fulfilled the requirements of grade 30. The bearing capacities evaluated from static loading tests agreed well with the anticipated values derived from analytical methods. However, during the dynamic tests large tensile stresses ocurred. This made it difficult to mobilise the required resistance without cracking the piles. Experience gained at the site revealed that auger cast piles are suitable and cost-effective where the geological conditions are appropriate.
|article #821; publication #36 (IC-1994)|