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Long-term operational experience of an energy pile wall in a tunnel: Construction, repairs, energy performance and thermal behavior
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DOI：10.1016/j.tust.2026.107978.png)
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Abstract
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• 24-year data set of the earliest use of energy geostructures in tunneling. • Monitoring across construction, operational, and idle phases. • Multi-year energy performance, comparison to design values and adjacent BHEs. • Impact of design choices and maintenance practices on long-term efficiency. • Demonstrates robustness of ground source heat pump systems and energy geostructures.
Keywords:
Underground infrastructure
Energy geostructures
Construction procedures
Long-term field measurements
Operational performance
System maintenance
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