Influence of grille spacing on the uplift behaviour of steel grillages for OHLs

Charlie Shepherd; Michael Brown; Craig Davidson; Christopher Beckett; Stuart Fliny

doi:10.1201/9871003431749-654

Influence of grille spacing on the uplift behaviour of steel grillages for OHLs

Charlie Shepherd, Michael Brown, Craig Davidson, Christopher Beckett, Stuart Fliny

Civil Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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Abstract

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.

Original language	English
Title of host publication	Geotechnical Engineering Challenges to Meet Current and Emerging Needs of Society
Subtitle of host publication	Proceeings of the XVIII European Conference on Soil Mechanics and Geotechnical Engineering
Editors	Nuno Guerra, Manuel Matos Fernandes, Cristiana Ferreira, António Gomes Correia, Alexandre Pinto, Pedro Sêco e Pinto
Place of Publication	Oxon
Publisher	CRC Press
Pages	3316-3320
Number of pages	5
ISBN (Electronic)	9781003431749
ISBN (Print)	978-1-032-54816-6
DOIs	https://doi.org/10.1201/9871003431749-654
Publication status	Published - 26 Aug 2024
Event	The XVIII European Conference on Soil Mechanics and Geotechnical engineering. - MEO Arena, Lisbon, Portugal Duration: 26 Aug 2024 → 30 Aug 2024 Conference number: 18 https://www.ecsmge-2024.com/

Conference

Conference	The XVIII European Conference on Soil Mechanics and Geotechnical engineering.
Abbreviated title	ECSMGE 24
Country/Territory	Portugal
City	Lisbon
Period	26/08/24 → 30/08/24
Internet address	https://www.ecsmge-2024.com/

Keywords

Grillage
Over head lines
Foundation
Uplift

ASJC Scopus subject areas

Civil and Structural Engineering
Energy Engineering and Power Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1201/9871003431749-654Licence: CC BY-NC-ND

Grillage_shepherd_ECSMGE24Final published version, 2.91 MBLicence: CC BY-NC-ND

Cite this

Shepherd, C., Brown, M., Davidson, C., Beckett, C., & Fliny, S. (2024). Influence of grille spacing on the uplift behaviour of steel grillages for OHLs. In N. Guerra, M. M. Fernandes, C. Ferreira, A. Gomes Correia, A. Pinto, & P. Sêco e Pinto (Eds.), Geotechnical Engineering Challenges to Meet Current and Emerging Needs of Society: Proceeings of the XVIII European Conference on Soil Mechanics and Geotechnical Engineering (pp. 3316-3320). CRC Press. https://doi.org/10.1201/9871003431749-654

Shepherd, Charlie ; Brown, Michael ; Davidson, Craig et al. / Influence of grille spacing on the uplift behaviour of steel grillages for OHLs. Geotechnical Engineering Challenges to Meet Current and Emerging Needs of Society: Proceeings of the XVIII European Conference on Soil Mechanics and Geotechnical Engineering. editor / Nuno Guerra ; Manuel Matos Fernandes ; Cristiana Ferreira ; António Gomes Correia ; Alexandre Pinto ; Pedro Sêco e Pinto. Oxon : CRC Press, 2024. pp. 3316-3320

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title = "Influence of grille spacing on the uplift behaviour of steel grillages for OHLs",

abstract = "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.",

keywords = "Grillage, Over head lines, Foundation, Uplift",

author = "Charlie Shepherd and Michael Brown and Craig Davidson and Christopher Beckett and Stuart Fliny",

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doi = "10.1201/9871003431749-654",

language = "English",

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Shepherd, C , Brown, M , Davidson, C, Beckett, C & Fliny, S 2024, Influence of grille spacing on the uplift behaviour of steel grillages for OHLs. in N Guerra, MM Fernandes, C Ferreira, A Gomes Correia, A Pinto & P Sêco e Pinto (eds), Geotechnical Engineering Challenges to Meet Current and Emerging Needs of Society: Proceeings of the XVIII European Conference on Soil Mechanics and Geotechnical Engineering. CRC Press, Oxon, pp. 3316-3320, The XVIII European Conference on Soil Mechanics and Geotechnical engineering., Lisbon, Portugal, 26/08/24. https://doi.org/10.1201/9871003431749-654

Influence of grille spacing on the uplift behaviour of steel grillages for OHLs. / Shepherd, Charlie ; Brown, Michael ; Davidson, Craig et al.
Geotechnical Engineering Challenges to Meet Current and Emerging Needs of Society: Proceeings of the XVIII European Conference on Soil Mechanics and Geotechnical Engineering. ed. / Nuno Guerra; Manuel Matos Fernandes; Cristiana Ferreira; António Gomes Correia; Alexandre Pinto; Pedro Sêco e Pinto. Oxon: CRC Press, 2024. p. 3316-3320.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Influence of grille spacing on the uplift behaviour of steel grillages for OHLs

AU - Shepherd, Charlie

AU - Brown, Michael

AU - Davidson, Craig

AU - Beckett, Christopher

AU - Fliny, Stuart

N1 - Conference code: 18

PY - 2024/8/26

Y1 - 2024/8/26

N2 - 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.

AB - 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.

KW - Grillage

KW - Over head lines

KW - Foundation

KW - Uplift

U2 - 10.1201/9871003431749-654

DO - 10.1201/9871003431749-654

M3 - Conference contribution

SN - 978-1-032-54816-6

SP - 3316

EP - 3320

BT - Geotechnical Engineering Challenges to Meet Current and Emerging Needs of Society

A2 - Guerra, Nuno

A2 - Fernandes, Manuel Matos

A2 - Ferreira, Cristiana

A2 - Gomes Correia, António

A2 - Pinto, Alexandre

A2 - Sêco e Pinto, Pedro

PB - CRC Press

CY - Oxon

T2 - The XVIII European Conference on Soil Mechanics and Geotechnical engineering.

Y2 - 26 August 2024 through 30 August 2024

ER -

Shepherd C , Brown M , Davidson C, Beckett C, Fliny S. Influence of grille spacing on the uplift behaviour of steel grillages for OHLs. In Guerra N, Fernandes MM, Ferreira C, Gomes Correia A, Pinto A, Sêco e Pinto P, editors, Geotechnical Engineering Challenges to Meet Current and Emerging Needs of Society: Proceeings of the XVIII European Conference on Soil Mechanics and Geotechnical Engineering. Oxon: CRC Press. 2024. p. 3316-3320 doi: 10.1201/9871003431749-654

Influence of grille spacing on the uplift behaviour of steel grillages for OHLs

Abstract

Conference

Keywords

ASJC Scopus subject areas

UN SDGs

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