Nguyen, H, Khabbaz, H, Fatahi, B & Hsi, J 2017, 'Effects of installing controlled modulus columns on previously installed columns', proceeding of the International Conferences on Soil Mechanics and Geotechnical Engineering, the 19th International Conference on Soil Mechanics and Geotechnical Engineering, Seoul, South Korea.View/Download from: UTS OPUS
Controlled modulus columns (CMC) ground improvement technique is an attractive geotechnical solution for
modification of soft soils. This technique uses a displacement auger during column installation, aiming to reduce the construction cost
and disposal of excavated materials. However, lateral and vertical soil movement induced by the installation process may pose
potential risks to the adjacent previously installed columns. Only a handful of studies have been attempted in quantifying such effects.
This paper presents the results of a numerical investigation on the effects of CMC installation sequence on the already installed
columns using the three-dimensional finite difference software package FLAC3D . The results indicate that the installation sequence
should be taken into account in the design process to minimise any adverse effects of installing new CMCs on the existing columns.