This book encapsulates the analysis and design of buried gravity flow conduits, including pipe materials and soil materials and their interaction. These range from traditional pipes to open bottom concrete and corrugated metal culverts with spans of up to 25 metres, and include culverts, storm drains, sewers, and buried bridges. It begins with historical background and easily understandable design models then considers the properties of pipe materials and of pipe rings and backfill soils and the commonalities in their behavior. Finally, design methods consider the interaction of pipe and...