Wooden retaining systems in temporary building excavations

Abstract

This thesis explores the possibility of using timber as a primary material for small scale temporary excavation retaining structures, emphasising its sustainability, practicality, and potential for modern construction applications. Timber retaining structures have been widely used for centuries, proving their effectiveness in excavation support. Historically, these structures provided a reliable and cost-effective solution for stabilising soil in various excavation projects. However, as construction methods evolved, alternative materials became more common, leading to a decline in the use of timber for this purpose.

With advancements in engineering and materials science, modern innovations now allow for improvements to these traditional designs, making them viable once again for temporary excavation support. By integrating updated calculation methods, improved structural detailing, and optimised construction techniques, timber retaining walls can be adapted to meet current engineering standards while maintaining their environmental benefits.

This study combines geotechnical and structural analysis to validate the performance of a timber retaining system, assessing its stability and load bearing capacity. The results indicate that such structures can be designed to withstand necessary forces. Moreover, the use of timber aligns with sustainable construction practices, offering a renewable and environmentally responsible alternative to other materials.

Although this thesis does not present a finalised design, it provides a foundation for further research and development, showing how timber can play a valuable role in temporary building excavation support systems, ensuring they remain a relevant and eco-friendly solution in future projects.