SMART CELL: THE IMPROVEMENT FOR DRILLED SHAFTS AND CARBON FOOTPRINT REDUCTION-Paper

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The paper examines how Smart Cell (SC) and Expander Body (EB) technologies can reduce emissions from cast-in-place deep foundations. Both devices improve pile-toe performance and mobilize resistance earlier, allowing piles to carry greater loads with less settlement. SC is an instrumented grout-injection cell attached to the reinforcement cage; EB is an expandable steel body installed at the pile tip and injected with grout.<br /><br />By increasing load capacity, these technologies can enable smaller or fewer piles and reduce concrete, steel, excavation, soil transport, and construction time. Lower material use and fewer equipment hours translate into reduced greenhouse-gas emissions. The authors also emphasize monitoring and quality control as operational benefits.<br /><br />The paper compares emissions across pile types using simplified estimates of material production, transportation, equipment use, and electricity. Its examples show substantial potential savings, although results vary by soil and pile method. At the Mario Foianini 2 bridge, SC piles produced 48.3% fewer emissions than the original design; load tests also indicated that fewer piles might have been needed with testing incorporated into design. In an experimental field, full-displacement piles fitted with EB had the lowest emissions per unit of service load among the compared options. The authors report potential reductions of up to 90% in carbon footprint per load resisted, alongside reductions in concrete use and excavated-soil transport.<br /><br />The paper concludes that combining toe-improvement devices with displacement piling, monitoring, and load testing can improve foundation performance while reducing resource use, emissions, costs, and construction time. It recommends further research across different ground conditions and project types.

Keywords

Smart Cell

Expander Body

deep foundations

cast-in-place piles

pile toe improvement

load capacity

greenhouse-gas emissions

full-displacement piles

load testing

carbon footprint