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Modelling and measurement of soil gas flow

Cripps, Andrew Jonathan; (1997) Modelling and measurement of soil gas flow. Doctoral thesis (Ph.D), UCL (University College London). Green open access

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Abstract

The work presented in this thesis covers several different modelling and experimental studies into the flow of gases in soil. They were carried out by the author as part of the work of a team at the Building Research Establishment investigating how to protect buildings against soil gases. It addresses the issues under three separate headings: o Flow due to natural driving forces, o High pressure flows, o Time dependent effects.For each part a combination of modelling techniques has been applied to the problems considered and a number of experiments analysed. The modelling techniques used vary from simple analytical models through more advanced analytical techniques to numerical solutions. Some of these develop directly from the work of others, but many are new to the soil-gas field. Most of the experiments were carried out by the author or under his direct supervision, but others were being carried out by colleagues at BRE for some other purpose and provided useful input to this work. Particular areas developed were: o The flow rates generated by 'sumps', o Where the flow from a sump comes from, and hence its associated energy costs. o A technique for measuring the leakage of the substructure of a house (under some special conditions), o The ease of air flow through different hard core materials, o How pressure extension tests can be used in testing floors for air flow, o The way in which changing atmospheric pressure affects soil gas, and o The techniques used for monitoring the flow of gas from soil. Some new developments in all of these areas are presented here, sometimes in the form of results specific to the UK, e.g. our floor type or our hard core materials, but in general these represent a small step forward in some part of the overall understanding of soil gas flow.

Type: Thesis (Doctoral)
Qualification: Ph.D
Title: Modelling and measurement of soil gas flow
Open access status: An open access version is available from UCL Discovery
Language: English
Additional information: Thesis digitised by ProQuest.
Keywords: Earth sciences
URI: https://discovery.ucl.ac.uk/id/eprint/10101360
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