Design of cantilever timber poles in cohesive soil

Author: Kiwan Park

Park, Kiwan, 2023 Design of cantilever timber poles in cohesive soil, Flinders University, College of Science and Engineering

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The p-y curve is a graph that represents the relationship between soil resistance and the lateral displacement of a pile below the ground surface when the pile is subject to lateral loads. Numerous geotechnical engineering researchers have developed p-y curves for various environments and conditions. These curves have been designed for individual piles and pile groups in both offshore and onshore platforms. However, despite their wide use in New Zealand, cantilever timber pole walls, which are composed of timber poles, lack a dedicated p-y curve. Typically, the design of these timber pole walls in consulting firms has relied on the inaccurate continuous wall method. This method, which assumes the wall to be a single entity, fails to fully consider soil-pile interactions, such as the pile group reduction effect. Hence, this thesis aims to plot p-y curves for timber pole walls, taking into account the pile group reduction effect. The project involved creating new p-y curves for timber pole walls by utilising two analytical methods varying in strength and pile spacing. The conditions and environments for plotting these new curves are aligned with real-world scenarios for timber pole walls. These newly plotted p-y curves were compared with those generated by the RSPile software.

Keywords: Timber pole walls, Soil resistance, Soil displacement

Subject: Engineering thesis

Thesis type: Masters
Completed: 2023
School: College of Science and Engineering
Supervisor: Hongyu Qin