Education

# InSAR and finite element analysis in geotechnical engineering

## Here are some of the questions I ask Andrew:

• What is FEA (Finite Element Analysis)? And what are its benefits to construction?
• What’s your advice for young engineers who started FEA in geotechnical engineering?
• What is the biggest revolution in recent years in geogrid reinforcement?
• InSAR is growing rapidly in the field of geotechnical engineering. Can you explain to listeners who may not be familiar with what InSAR is and how it works?
• What does the future of geoengineering look like in your opinion?
• What advice would you like to give to young engineers considering participating in these areas of geotechnical engineering?

## Here are some of the key points that have described InSAR and finite element analysis in geotechnical engineering:

• Finite element analysis (FEA) is found in all areas of engineering. It is a powerful analytical tool and is especially useful in geotechnical engineering. This allows you to analyze the behavior of complex materials such as soil and rock. Various types of data can be incorporated into finite element analysis (FEA) models. It is used when the shape, load conditions, soil behavior, etc. are very complex. This is a great tool that can save a lot of time and money for clients if traditional calculation methods are not suitable for the complexity of the project.
• Young graduate engineers still have a lot to learn about the work to do finite element analysis correctly. Today, young engineers need to use more learning resources to qualify more at FEA. Always be suspicious of the output, no matter how correct it looks. Always consult an expert regarding the findings.
• The biggest revolution in geogrid reinforcement in recent years is not only reinforcement, but also mechanical stabilization. When shear deformation occurs in the soil, the movement of particles in the aggregate is obtained. The particles move with each other and resist friction between them, but more importantly, they also get the rotation of the particles. Introducing a geogrid into the matrix acts as an obstacle to the movement of the particles. Particles that work with the geogrid improve rotation and movement, making the aggregate stronger and improving the basic behavior of the aggregate.
• InSAR is a technology used to generate displacement outputs for ground and buildings. Satellites 500 miles above the surface of the Earth measure displacements of a fraction of an inch on the ground. The satellite uses radar images to determine if a displacement has occurred on the surface of the earth during the imaging time of a particular area. The new technology stacks multiple images to eliminate more errors and detect displacement with an accuracy of just a few millimeters. This allows geoengineers to quickly obtain site displacement data for the last five years. It is also used as a forensic tool for continuous monitoring of large geotechnical structures to check for defects and in the event of a failure.
• The future of geotechnical engineers looks great as demand grows. The legacy infrastructure we have is outdated and flawed. They have been underfunded in the past and are now being used more than they were designed for. Climate change makes geological engineering aspects more susceptible to geological disasters. Technology will grow exponentially in the geotechnical sector to assist in the inspection of legacy infrastructure. This allows you to identify problem areas that are invisible to the naked eye and actively intervene.
• There are many opportunities for young engineers in these areas of geotechnical engineering. Do your graduate studies to gain your background knowledge and help you choose the field you want to work in. The best way to learn something is to teach it, so consider giving some teaching in your field of study.

## Details of this episode …

### About guests: Andrew Lees, Ph.D., MICE CEng

Andrew is a UK geoengineering engineer currently based in Cyprus with over 20 years of experience. He is Director of Geofem, Global Application Technology Manager of Tensar, and Visiting Scholar of the University of Southampton. He is also the author of textbooks and academic papers on the Eurocode 7 drafting panel, and presenter of the Tensar Ground Coffee evlog and other webins. He is also a Chartered Engineer, a member of the British Society of Civil Engineers, and holds a PhD in BEng Civil Engineering. Both geotechnical engineering at the University of Southampton.

### About the host: Jared M. Green, PE, D.GEF.ASCE

Originally from southwestern Philadelphia, Pennsylvania, Jared graduated from the Faculty of Engineering at Syracuse University in 2001 with a Bachelor of Science degree in Civil Engineering. He then earned a master’s degree in civil engineering from the University of Illinois Urbana Campaign in 2002. In 2003, he started working at Langan’s New York City Hall. Since then, he has been Principal / Vice President and one of the owners of this international land development engineering consulting firm. 15 years later LanganJared has moved to an office in Philadelphia and is one of the practice leaders in geoengineering in that office.

Jared is a consultant and team leader who also enjoys teaching young engineers and first generation college students. He has been instrumental in increasing the number of pre-university students who are interested in STEAM’s majors and disciplines. He strives to make complex engineering topics relevant and easy to understand for those who are new to the field or who are completely new to engineering. Jared and his family currently live in Flemington, NJ. He and his wife have three energetic, curious and wonderful children. Can connect with Jared Here..

### Books mentioned in this episode:

Geotechnical Finite Element Analysis — Practical Guide

## This episode will bring you Tenser

When TenserYou can design and build with confidence because you can achieve a cost-effectively designed site solution. Our industry-leading geogrid technology and other innovative products solve the most difficult soil stabilization, soil reinforcement, and site development challenges. Through these innovations, our technology is backed by decades of research and proven performance, enabling us to create a more resilient future. From the start to the end of the project, we are not afraid to stain the boots. Wherever you are, you can rely on our international Tensar team and our network of sales partners to provide support and advice. Whether you’re building a road, retaining wall, railroad, or foundation, we’re a reliable partner. For more information on Tensar, please visit: www.tensarcorp.com..

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