6 p.m., Institution of Civil Engineers, One Great George Street, London
Keller Europe President Jim De Waele and Consultant David Corke will discuss developments in the design, installation and maintenance of pile working platforms and the evolving approach around the world . The European Federation of Foundation Contractors (EFFC) guide will be discussed, as will ongoing research activities looking at ways to test platforms that should lead to improved platform design.
The second part of the presentation will present a practical way to validate the design of the platform as well as new methods of proof testing within the framework of the current evaluation.
To simulate the effect of actual track loading on the roadbed and subgrade, a test plate should have similar proportions to the loaded track area, which is impractical. Plate load tests can be used but are not suitable for checking the overall bearing capacity of the platform. There have also been many discussions over the years about the appropriate plate size and the role of plate load testing. However, recent research and testing has shown that a test plate of 3.5 times the maximum material particle size of the platform provides reliable test results. This now opens up the possibility of using plate load tests to determine the angle of friction of a granular working platform. This will lead to better on-site verification, but above all to better platform design, which will be a significant step forward for our industry.
More information is available here.