Soil Thermal Resistivity (STR)
The STR for cable specifications is typically measured at 10 m
intervals from a survey point along a cable route. Additional survey
points are located as dictated by ground condition variations or
features.
Measurements are typically taken at a depth of 0.6 to 1 m using
a Decagon KD2 Thermal Properties Analyser. This is fitted with a
1200 mm length, 1.27 mm diameter probe sensor using the transient
line heat source method. Units are in meter-degrees C per watt (m
C W-1)
The probe is inserted into the soil and using a ‘slide rod’
system the probe sensor is located 60 mm into the soil. The STR
is measured over a 90 second period.
A soil moisture sample is also taken at measurement depth and gravimetric
soil moisture determined according to BS1377 in the laboratory.
Contact us on Newcastle 0191 243 0686 or Reading
0118 965 7523 to discuss your requirements
We also hire out this equipment - please contact
us for rates. |
