Topic:
Enhancing Filtration Design in Earthwork Construction Using Geotextiles
Course Overview:
Filters are essential components in a wide range of earthwork construction projects. They serve an important function by ensuring the smooth flow of water and preventing fines from entering and affecting the performance of drains. While geotextiles are commonly used in filter applications, uncertainty remains regarding the key considerations for effective filtration design.
In this presentation, Gordon Stevens will cover the key considerations for filtration design using geotextiles. He will emphasise the importance of designing filters to ensure the integrity of the drain, including soil compatibility as a performance requirement. Soil testing is essential in the design process, with retention criteria differing between steady-state and dynamic flow conditions. The presentation will also highlight geotextile selection, focusing on survivability and durability. Typical filter design examples will be provided to effectively illustrate the process and address common questions and concerns.
Speaker:
Gordon Stevens is Technical Manager for Geofabrics New Zealand. He holds a 4 year Higher National Diploma in Civil Engineering and has been involved in the design and use of geosynthetics into infrastructure projects throughout New Zealand, the Pacific and Papua New Guinea for over 30 years. A member of the International Geosynthetic Society, Gordon’s area of expertise includes reinforced soil and retaining wall design where he has delivered numerous training courses and technical papers.
Learning Outcomes
- Gain an understanding of the importance of filtration design in earthwork construction
- Explore the key considerations essential for designing effective filters
- Identify problematic soils and their impact on filtration design
- Recognise the need for performance testing in critical projects