Influence of Pile Diameter on Constant of Horizontal Subgrade Reaction nh
DOI:
https://doi.org/10.21467/proceedings.7.7.9Abstract
The constant of horizontal subgrade reaction (nh) is a cornerstone parameter in the Winkler-based subgrade reaction method for analyzing laterally loaded piles. This article re-examines whether nh is independent of pile diameter. The previous assumption that the deflection of the pile is linearly proportional to the dimension of a pressure bulb does not accurately reflect the real situation. Three-dimensional finite element method was employed to conduct a series of analyses, demonstrating that for the same soil material, nh increases almost linearly with pile diameter. By comparing the deflection results of pile obtained from Plaxis3D, with those derived from the subgrade reaction method using nh, it is evident that when employing the nh method, the influence of pile diameter should be considered to reduce material costs and carbon emissions in projects involving laterally loaded piles.
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