How Granular Soil Insights Lead to a Lower Carbon Footprint
What if the key to stronger, more sustainable infrastructure lies not just in traditional construction methods, but in understanding the movement of individual soil particles? Dr. Tong Qiu, Professor and Department Chair of Civil & Environmental Engineering, is exploring this idea through his innovative research on soil compaction.
Supported by a newly awarded National Science Foundation (NSF) grant, Dr. Qiu’s work is set to transform the critical process of soil compaction—a cornerstone of civil infrastructure.
Soil compaction is essential for stabilizing infrastructure foundations, yet current practices often rely on mere experience and intuition rather than quantifiable data, leading to inefficiencies like under- or over-compaction. Dr. Qiu’s research introduces a data-driven approach to address these issues. By using sensors to study how soil particles move (kinematics) during compaction, the research aims to create more efficient and sustainable construction practices.
The innovation of this research is the hypothesis that particle kinematics—rather than surface settlement—can provide a more accurate measure of soil compaction. Dr. Qiu’s team will test this by using advanced sensors like geophones, accelerometers, and SmartRocks to track soil particle behavior during compaction. The data will then help refine computer models, making simulations of real-world conditions with vibratory rollers more accurate.
One of the key benefits of this research is its potential to reduce the carbon footprint of construction. Over- or under-compaction can lead to wasted time, materials, and energy, as additional work may be needed to correct issues. By accurately measuring soil particle movement during compaction, the research optimizes construction by minimizing the need for rework, reducing the use of heavy machinery (which emits CO2) and lowering overall energy and material consumption, all of which contribute to a lower environmental impact.
Comparison of a real gravel particle and a SmartRock
In collaboration with co-principal investigator Dr. Shihui Shen of Penn State Altoona, the project will also provide valuable hands-on research experiences for undergraduate students. These students will gain exposure to cutting-edge geotechnical engineering technologies, enriching their academic experience and enhancing the curriculum at both institutions
Awarded approximately $450,000 and set to run through 2027, this project provides a pathway to more efficient construction practices. Dr. Qiu’s work has the potential to revolutionize soil compaction techniques, making infrastructure development both more efficient and more sustainable.
Geotechnical Engineering at the University of Utah
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