Gas generation and accumulation by aquifer drawdown and recharge in the London basin. / Standing, J.; Ghail, R. C.; Coyne, D.

In: Quarterly Journal of Engineering Geology and Hydrogeology, Vol. 46, No. 3, 30.07.2013, p. 293-302.

Research output: Contribution to journalArticlepeer-review

Published

Standard

Gas generation and accumulation by aquifer drawdown and recharge in the London basin. / Standing, J.; Ghail, R. C.; Coyne, D.

In: Quarterly Journal of Engineering Geology and Hydrogeology, Vol. 46, No. 3, 30.07.2013, p. 293-302.

Research output: Contribution to journalArticlepeer-review

Harvard

Standing, J, Ghail, RC & Coyne, D 2013, 'Gas generation and accumulation by aquifer drawdown and recharge in the London basin', Quarterly Journal of Engineering Geology and Hydrogeology, vol. 46, no. 3, pp. 293-302. https://doi.org/10.1144/qjegh2013-030

APA

Standing, J., Ghail, R. C., & Coyne, D. (2013). Gas generation and accumulation by aquifer drawdown and recharge in the London basin. Quarterly Journal of Engineering Geology and Hydrogeology, 46(3), 293-302. https://doi.org/10.1144/qjegh2013-030

Vancouver

Standing J, Ghail RC, Coyne D. Gas generation and accumulation by aquifer drawdown and recharge in the London basin. Quarterly Journal of Engineering Geology and Hydrogeology. 2013 Jul 30;46(3):293-302. https://doi.org/10.1144/qjegh2013-030

Author

Standing, J. ; Ghail, R. C. ; Coyne, D. / Gas generation and accumulation by aquifer drawdown and recharge in the London basin. In: Quarterly Journal of Engineering Geology and Hydrogeology. 2013 ; Vol. 46, No. 3. pp. 293-302.

BibTeX

@article{09dc9eca2d044af7bdfa2b15503007cf,
title = "Gas generation and accumulation by aquifer drawdown and recharge in the London basin",
abstract = "Air at high pressure has recently been encountered during ground investigation borehole drilling for the Thames Tideway project in London. The air was released from within the Upnor Formation (at the base of the Lambeth Group beds), which is at the top of the Lower Aquifer. Cavitation within the granular beds of the Lower Aquifer would have occurred as a consequence of drawdown from the extensive water extraction that began at the start of the nineteenth century, resulting in the water table dropping by almost 70 m. Estimated historical pore pressure profiles are postulated and the cavitation process that occurred, along with the subsequent pressurization of the air during recharge that has occurred in recent years, are discussed using behavioural concepts from unsaturated soil mechanics. The hypotheses are corroborated by a series of simple column experiments where the processes are modelled using analogous soils. Engineering implications of the presence of the pressurized air are discussed: besides the potential for borehole blow-out, another serious consideration is the depletion of oxygen from the trapped air by chemical reaction with the soil, increasing the risk of confined space hypoxia.",
author = "J. Standing and Ghail, {R. C.} and D. Coyne",
year = "2013",
month = jul,
day = "30",
doi = "10.1144/qjegh2013-030",
language = "English",
volume = "46",
pages = "293--302",
journal = "Quarterly Journal of Engineering Geology and Hydrogeology",
issn = "1470-9236",
publisher = "Geological Society of London",
number = "3",

}

RIS

TY - JOUR

T1 - Gas generation and accumulation by aquifer drawdown and recharge in the London basin

AU - Standing, J.

AU - Ghail, R. C.

AU - Coyne, D.

PY - 2013/7/30

Y1 - 2013/7/30

N2 - Air at high pressure has recently been encountered during ground investigation borehole drilling for the Thames Tideway project in London. The air was released from within the Upnor Formation (at the base of the Lambeth Group beds), which is at the top of the Lower Aquifer. Cavitation within the granular beds of the Lower Aquifer would have occurred as a consequence of drawdown from the extensive water extraction that began at the start of the nineteenth century, resulting in the water table dropping by almost 70 m. Estimated historical pore pressure profiles are postulated and the cavitation process that occurred, along with the subsequent pressurization of the air during recharge that has occurred in recent years, are discussed using behavioural concepts from unsaturated soil mechanics. The hypotheses are corroborated by a series of simple column experiments where the processes are modelled using analogous soils. Engineering implications of the presence of the pressurized air are discussed: besides the potential for borehole blow-out, another serious consideration is the depletion of oxygen from the trapped air by chemical reaction with the soil, increasing the risk of confined space hypoxia.

AB - Air at high pressure has recently been encountered during ground investigation borehole drilling for the Thames Tideway project in London. The air was released from within the Upnor Formation (at the base of the Lambeth Group beds), which is at the top of the Lower Aquifer. Cavitation within the granular beds of the Lower Aquifer would have occurred as a consequence of drawdown from the extensive water extraction that began at the start of the nineteenth century, resulting in the water table dropping by almost 70 m. Estimated historical pore pressure profiles are postulated and the cavitation process that occurred, along with the subsequent pressurization of the air during recharge that has occurred in recent years, are discussed using behavioural concepts from unsaturated soil mechanics. The hypotheses are corroborated by a series of simple column experiments where the processes are modelled using analogous soils. Engineering implications of the presence of the pressurized air are discussed: besides the potential for borehole blow-out, another serious consideration is the depletion of oxygen from the trapped air by chemical reaction with the soil, increasing the risk of confined space hypoxia.

UR - http://www.scopus.com/inward/record.url?scp=84884395086&partnerID=8YFLogxK

U2 - 10.1144/qjegh2013-030

DO - 10.1144/qjegh2013-030

M3 - Article

AN - SCOPUS:84884395086

VL - 46

SP - 293

EP - 302

JO - Quarterly Journal of Engineering Geology and Hydrogeology

JF - Quarterly Journal of Engineering Geology and Hydrogeology

SN - 1470-9236

IS - 3

ER -