Year

2019

Degree Name

Master of Research

Department

School of Civil, Mining and Environmental Engineering

Abstract

Coir geotextiles are permeable natural fibres that are developed from the husk of the coconut to enhance the engineering properties of soil. Coir geotextile reinforcement is one of the most significant methods that has been used successfully in the recent years for variant number of geotechnical applications. The main reasons for using coir geotextiles are; the ease of placement, eco-friendliness, ubiquitousness, low cost, and biodegradability properties. In the recent past, many laboratory investigations have been carried out on the effect of coir geotextiles as soil reinforcement. However, these studies have not captured the stabilising mechanism of coir geotextiles reinforced soil under monotonic loading condition. In addition, only limited studies have discussed the cyclic behaviour of coir geotextiles reinforced soil. In this study, a robust finite element model was developed to understand and investigate the behaviour of coir geotextile reinforced soil during monotonic and cyclic loading. The finite model has captured the bearing pressure response of coir geotextile reinforced soil similar to the laboratory experiments. The inclusion of coir geotextiles increases the bearing capacity and reduces the settlement of soil during monotonic and cyclic loading. The inclusion of coir geotextiles in the soil creates a shear interface between the geotextile and the subbase soil. During monotonic and cyclic loading an axial force developed along the reinforcement. Due to the applied load at the surface of the structure, the subbase soil moves in a horizontal direction which leads to create the maximum axial forces under the footing, the forces gradually reduced when moving away from the applied load.

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Unless otherwise indicated, the views expressed in this thesis are those of the author and do not necessarily represent the views of the University of Wollongong.