Analysis and Design of Pile in expansive soil using uplift force

Author: Akshay Ahlawat

Ahlawat, Akshay, 2023 Analysis and Design of Pile in expansive soil using uplift force, Flinders University, College of Science and Engineering

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In this research, a new equation was also derived using Rayleigh’s method of dimensional analysis. This new equation uses the “soil suction” as key parameter to obtain pile movement in the soil. Soil suction values used for analysis chosen for different sites were based on comparing with a table where the study was performed by Snethen on Atterberg Limits (1977).

In this thesis, four sites were chosen to have expansive clay soil nature with different clay minerals type and their comparison is made in the analysis part of the thesis on net movement. Free-state province of the South Africa (between Kroonstad and Vredefort), Nanning, Guangxi Province of China, Colorado State University, Fort Collins, Colorado, and Shri Vishnu Educational Society of Andhra Pradesh, India.

An efficient pile design comparison was done on length for the design guide section of the thesis. The Rigid pier method was used for estimating length of pile required for 2 sites Free-state province and Colorado State University as pile length is not provided. Thereafter a comparison is performed for different pile bottom design types by Elastic design method, namely elastic straight shaft pier, belled pier, and helical pier (Nelson 2007). The results are presented for future design reference.

Keywords: Expansive soil, RSPile, Case Study, New method, Design Curve, Elastic Solution

Subject: Engineering thesis

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