PERFORMANCE OF INSTRUMENTED BORED PILE IN KENNY HILL FORMATION: Performance of Instrumented Bored Pile in Kenny Hill Formation

Raja Shahrom Nizam  Shah Raja Shoib; Ahmad  Safuan A Rashid

doi:10.55766/sujst-2023-01-e01869

Authors

Raja Shahrom Nizam Shah Raja Shoib School of Civil Engineering, Faculty of Engineering, Universiti Teknologi Malaysia
Ahmad Safuan A Rashid Centre of Tropical Geoengineering (GEOTROPIK), School of Civil Engineering, Faculty of Engineering, Universiti Teknologi Malaysia

DOI:

https://doi.org/10.55766/sujst-2023-01-e01869

Keywords:

Bored pile, kenny hill formation, standard penetration test, sedimentary, shaft resistance, end bearing resistance

Abstract

The Kenny Hill Formation forms part of the various geological formation and extends over a significant part of the Klang Valley of Peninsular Malaysia. Design of cast-in-place bored pile in Malaysia is usually based on empirical correlation with the Standard Penetration Tests (SPT-N). However, the current empirical correlation appears to indicate that the value may not be applicable for material with SPT-N>50. This paper presents the evaluation of measured shaft resistance, f_s and end bearing resistance, f_b of three instrumented cast-in-place bored piles constructed in the Kenny Hill Formation which were socketed into material with SPT-N value up to 300. The results are examined to validate the existing design method and to establish future guidelines for designing bored piles in this sedimentary formation. The correlation of f_su = 2N as suggested by Chang and Broms (1991) is achievable for material with SPT-N<50 blows/300mm. However, this correlation appeared to be unachievable for material with SPT-N>50 blows/300mm. It is recommended that lower value of K_su should be considered for SPT-N more than 50. In view of limited data for end bearing resistance, the correlation of f_b is almost reach to f_bu = 30N.

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PERFORMANCE OF INSTRUMENTED BORED PILE IN KENNY HILL FORMATION