Case Studies
Fieldwork Case Studies
Temperature Monitoring Programme
Only about half the London Underground network is
actually below ground, but a good deal of that is in
deep level tube driven through the famous London blue
clay that facilitated this kind of construction, mainly
during the Edwardian period.
Over the years the energy used to deliver the train
service has warmed up the tunnels and surrounding clay,
and London Underground has been working hard to mitigate
further rises in temperature to maintain levels of
comfort within reasonable limits and to ensure the train
environment remains acceptable for passengers.
This work depends on accurate data about existing
temperatures and how they vary according to outside
weather conditions as well as the impact of the various
mitigation measures and other variables. Fifth Dimension
has been retained to install and monitor the
temperatures at all deep level and some shallower
stations.
The work involves installation of proprietary
temperature logging devices at just under 400 locations
and periodic downloading of data to hand-held devices;
data comprises temperature and humidity readings taken
every 15 minutes. Data is checked for completeness and
any other inconsistencies before being forwarded to LU
in an agreed format. Great care is required in the data
handling in order to meet LU quality requirements.
