Publication Abstract

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

Kinetic and dynamic loading tests of a cast-in-place concrete pile
K. Yamashita, M. Kakurai, M. Chosokabe & T. Fukuhara

Cast-in-place concrete piles have recently found more popularity in Japan. However, various factors can lead to considerable reduction in the toe resistance of cast-in-place concrete piles in non-cohesive soil. This is more pronounced in large diameter piles. To investigate the load-displacement behavior of piles, static loading tests are most appropriate but these tests are time-consuming and not cost-effective. Pile dynamic testing methods have recently attracted attention because they offer simple and cost-effective alternatives to static loading tests. Kinetic and dynamic loading tests were conducted on a cast-in-place concrete pile embedded in a dense sand-and-gravel layer. In order to investigate the load-displacement beharior of the pile toe, shaft friction resistance was eliminated on the uper portion of the pile so as to be able to transfer most of the pile head load to the pile toe. In this paper we discuss the results of in-situ kinetic and dynamic loading tests on a cast-in-place concrete pile and examine the adequacy of these tests to assess the pile toe resistance for a wide range of loading.

 article #808; publication #36 (IC-1994)