Use of high strength steel in steel pipe piles
Kulianu, Alevtina (2018)
Hämeen ammattikorkeakoulu
2018
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2018091415147
https://urn.fi/URN:NBN:fi:amk-2018091415147
Tiivistelmä
The aim of this Bachelor’s thesis was to investigate the influence of higher steel grades on resistance factor in steel micro pipe piles to subsequently achieve more economical solutions using smaller pile diameter, but bigger structural limits. Buckling calculations were used as the main tool for this research.
The calculations were done according to the Eurocodes and Finnish Piling Manual –PO-2016. For convenience purposes calculations were done in Excel, to provide a comparison between graphs of steel pipe sizes allowing to see the degree of benefits in the use of the pile. Graphs reflect the interrelation between structural resistance and undrained shear strength in piles. Before making the calculations, the Eurocode was used to determine the characteristic structural resistance of each pile using higher steel grades. PO-2016 was used to determine the buckling factor of driven piles. Tables of structural resistance in correlation with undrained shear strength were made for ease of use.
The results of the thesis show that eleven steel piles with a smaller size in tandem with a higher steel grade can be used to achieve higher structural and geotechnical resistance.
The calculations were done according to the Eurocodes and Finnish Piling Manual –PO-2016. For convenience purposes calculations were done in Excel, to provide a comparison between graphs of steel pipe sizes allowing to see the degree of benefits in the use of the pile. Graphs reflect the interrelation between structural resistance and undrained shear strength in piles. Before making the calculations, the Eurocode was used to determine the characteristic structural resistance of each pile using higher steel grades. PO-2016 was used to determine the buckling factor of driven piles. Tables of structural resistance in correlation with undrained shear strength were made for ease of use.
The results of the thesis show that eleven steel piles with a smaller size in tandem with a higher steel grade can be used to achieve higher structural and geotechnical resistance.