Influence of grille spacing on the uplift behaviour of steel grillages for OHLs
Influence of grille spacing on the uplift behaviour of steel grillages for OHLs
The increasing development of renewable energy (e.g. on and offshore wind) has increased the demand on existing electricity transmission networks in the UK. However, the remoteness of the transmission network, particularly in Scotland, makes upgrade and renewal, both economically and environmentally challenging, with often highly restrictive access constraints. Steel grillages are an alternative non-concrete foundation that can be loaded immediately post-backfill and transported to remote locations using low-ground pressure vehicles or helicopters. This paper investigates the optimisation of steel grillages for overhead line foundations such that the uplift load-displacement response is comparable to solid foundations (i.e. a concrete pad). Initial 1g uplift tests have shown that the optimal grille-spacing-to-width ratio (s/w) for a comparable ultimate uplift capacity to a solid plate lies within 1 < s/w < 2.
C. J. Shepherd; M. Brown; Craig Davidson; C. T. S. Beckett; Stuart Flint
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
E - Environment, water and energy
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