Comparing the effect of negative friction on the design bearing capacity of precast piles with different assumed embankment thicknesses

Abstract

DOI: https://doi.org/10.66195/mtu.2026.16.151

This paper compares the negative skin friction effects of soil on the load-bearing capacity of precast squarsection reinforced concrete containers in areas 4 and 5 of the Rach Gia Kien Giang (formerly) land reclamation project, assuming different embankment layers and surface cross-sections. The depth of acoustic influence can vary depending on the height of the embankment layer (or the magnitude of the load) and the thickness of the weak soil layer. The survey results show that negative friction can occur in weak soil areas when the settlement of the soil layer is greater than the settlement of the pile. As the thickness of the load increases, the design bearing capacity of the pile decreases due to the effect of negative friction. At the same time, as the pile cross-section increases, the design bearing capacity is still affected by negative friction, but to a lesser extent. Thus, the results obtained contribute to evaluating the influence of negative friction on the bearing capacity of piles based on the thickness of the embankment layers in some areas of the Rach Gia reclaimed land.