Publication Abstract

Proceedings - Fifth International Conference & Exhibition on Piling and Deep Foundations, 1994, Bruges, Belgium, (DFI)

Long term monitoring of negative skin friction in driven piles installed in reclaimed land
K.K.S. Ho & S.H. Mak

The assessment of the magnitude of negative skin friction, its rate of development and the location of the neutral point remains a difficult design problem for piles installed in settling ground conditions due to the number of variables involved. This problem is particularly acute in the case of driven piles in relatively old reclamation in view of the uncertainties related to the influence of pile construction. The best approach is to make reference to local instrumented pile data. However, very little relevant field data exist in Hong Kong. This paper describes a project involving long-term monitoring of the behavior of prestressed spun concrete piles installed in a 20-year old reclamation in Hong Kong. The instrumentation comprises a combination of vibrating wire and electrical resistance strain gauges to determine the load distribution in the piles. A total of five piles have been instrumented and monitored for up to six years. In this paper, the interpreted results of the monitoring are summarized and discussed.

 article #831; publication #36 (IC-1994)