Geotechniek 2018 - Special CPT
Cone Penetration Testing in layered soils
D.A. de Lange, J. Terwindt, T.I. van der Linden, Geotechniek Special CPT, juni 2018, pagina 5
Multi-layer systems consisting of multiple sequences of thin soil layers are typically deposited in marine environments. The geotechnical properties of the sand layers can be important, especially where it concerns sensitivity to liquefaction. Performing CPTs is a common method to determine geotechnical properties, but the interpretation of CPT within multi-layered soil zones holds large uncertainty. The Dutch ‘Koppejan’-method for determination of pile base resistances could be used to model the cone resistance in thinly inter-layered soils. Model experiments in well-controlled circumstances have been performed to investigate the feasibility of this approach to come up with correction factors to the measured CPT values. Volledige artikel
Pinpointing tie-back anchors using magnetic CPT investigation
R. Spruit, W. van Bommel, Geotechniek Special CPT, juni 2018, pagina 10
Rotterdam engineers have improved the art of the CPT based magnetic profiling technique. With the adaptations and improvements it has become possible to reliably locate obstacles like steel anchor rods (tie-back anchors). Volledige artikel
Setting up a system of standard procedures for geotechnical investigations in Belgium, with focus on CPT
G. van Alboom, Geotechniek Special CPT, juni 2018, pagina 14
In order to assure a better and uniform quality for geotechnical investigations in Belgium the Belgium member society of ISSMGE decided to draw up a set of several standard procedures for geotechnical investigations and a Task Force was created to tackle the problem. Developing a standard procedure for CPT jobs was the primary goal of the Task Force. This paper describes the general approach of assignments for geotechnical investigation and design, and the two CPT documents referring to the planning, execution and reporting of CPT jobs. Volledige artikel