SOIL PROPERTY TESTING LIMITED
SOIL PROPERTY TESTING LIMITED
Tel: +44 (0) 1480 455579
EUROCODE 7
Downloads are being compiled to give ongoing information on Eurocode 7 and its gradual adoption as time goes on.
With regard to Laboratory testing, the disciplines of BS1377:1990: parts 1-8, remain current, and the testing detailed in BS EN 17892 series is not presently being invoked in Britain.
BS 5930:1999 “Code of Practice for site investigation” was amended in August 2010 to comply with the requirements of BS EN ISO 14688 Parts 1 and 2. not the least as follows:
Field descriptions of soils remain similar , but consistency is determined by hand pressures, not shear strengths, and the previously mutual exclusive rule of not using the terms silt and clay together, is removed to allow the descriptions of silty CLAY, or clayey SILT to be used again.
The shear strength of soils when measured by Field or Hand Shear Vane Apparatus, or in the laboratory by Quick Undrained Triaxial compression test, shall be expressed as Table 5 below:
Term based on measurement Undrained Shear Strength classification definition Cu, in kPa
(From BS EN ISO 14688-2:2004,5.3,Table 5)
Extremely low <10
Very low 10 - 20
Low 20 - 40
Medium 40 - 75
High 75 - 150
Very high 150 - 300
Extremely high 300 - 600
DURING THIS TRANSITIONAL PERIOD WE WILL ENDEAVOUR AT OUR “CONTRACT REVIEW STAGE” TO ASCERTAIN FROM CUSTOMERS EXACTLY THE TERMINOLOGY THEY WISH TO BE USED WITH DUE REGARD TO THE ABOVE, AND OTHER PARAMETERS AS DETAILED IN BS EN ISO 14688 Parts 1 & 2
Presently some customers are submitting U(T)100 thin walled tubes for shear strength and consolidation testing.
Simon Townend
March 2011
Introduction of EUROCODE 7
Eurocode 7 Downloads
Sampling Methods and Classes
Field Description of Soils - encompassing Eurocode 7
Ground Engineering Technical Note - BS EN ISO 22475-1: Implications for geotechnical sampling in the UK: August 2009
Ground Engineering Technical Note - Development of a thin wall open drive tube sampler (UT100): March 2010