Gamma Cones

Projects

M2 Motorway

Lankelma was asked by W.S.Atkins for Carillion Highways Maintenance to carry out an extensive test program on the M2 motorway in Kent. In 19, 6 hour night sessions, a total of 349 tests were carried out. Factual reporting was carried out on a daily basis. Using cone testing techniques ensured a cost and time effective investigation.

A combination of different special cones were used in the investigation. Cone and friction CPT’s were carried out to determine the material and grade of the chalk layers present. Our new Gamma Cone was used to detect variations in the natural radioactivity of the stratification. This helps to determine between the infilled clay and the highly weathered chalk. Finally we used the videocone for visual confirmation of the material.

Factual reporting was carried out on a daily basis allowing the investigation to be tailored to the site conditions. Using cone techniques ensured a cost and time effective investigation.