OasisLMS

Driven pile foundations are the most common foundation system used in marine environments. There is a drastic disruption in existing soil conditions when the driving process is carried out. Despite this, soil tends to settle back in its original condition over time. Consequently, the load bearing capacity of the piles may change with respect to the amount of time that has passed since the piles have been driven. This is a natural phenomenon that occurs because of dissipation of excess pore water pressure over time. The purpose of this paper is to compare and discuss pile setup factors in saturated silty sand layers based on high strain dynamic load tests (HSDLT) conducted on a driven pile during different time frames. We have installed a steel tubular pile and conducted a series of HSDLT tests at different intervals to estimate the setup factor to validate our calculations regarding design capacity. In addition to this, a static load test was also conducted on the same pile 48 days after the pile was installed in order to determine its performance. It was found that the bearing capacity that was computed based on a static load test is 2.1 times greater than the capacity measured by a dynamic load test at the end of the initial drive.

Inbaraj Duraisamy, L&T GeoStructure Pvt. Ltd; Rajan S N, L&T GeoStructure Pvt. Ltd; M. Kumaran, L&T GeoStructure Pvt. Ltd

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