ABSTRACT
Small diameter segmental jacked pipe piles are one option for underpinning lightly structures to reduce settlement and restore the structure. Short sections of steel pipe are jacked into the ground through poor soils to achieve the desired load capacity from end bearing on a firm layer using the mass of the structure as the reaction. At the present there are few design guidelines available for jacked piles. A study was conducted to evaluate the influence of end configuration on the installation jacking force and load behavior on jacked segmental pipe piles in clay. Piles with diameters of 73 mm and 89 mm were used. During installation the jacking force was measured to relate jacking force to load capacity. Compression tests were conducted one day after installation to determine short-term axial capacity and then repeated on over a period of 10 days to 750 days to evaluate aging behavior.
