Analysis of the Negative Skin Friction Impact Due to Pile Height Based on CPT Data
DOI:
https://doi.org/10.58466/fm0c4w35Keywords:
CPT data, embankment, negative skin friction, soft soilAbstract
Soft soil is a major challenge in construction projects due to it’s low bearing capacity and it’s tendency to undergo settlement under loading, especially with high embankments. One of the consequences of this condition is the development of negative skin friction on pile foundations, which can significantly reduce their bearing capacity. This study aims to analyze the influence of embankment height on the magnitude of negative skin friction based on Cone Penetration Test (CPT) data and to evaluate it’s impact on pile foundation stability. The primary data was obtained from CPT results at point S – 6, which include soil parameters such as qc, fs, and soil classification. The calculation results show that negative skin friction increases with higher embankment levels, with the highest value observed at a 3.5 meter embankment height, however the increase is not linear. Despite the additional load caused by negative skin friction, both group and single pile foundations still meet the safety criteria. In addition, the elastic settlement remains below the allowable limit. Based on these findings, it can be concluded that while negative skin friction must be considered in foundation design, the pile foundations at the study site remain safe against the effects of high embankments.
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