Abstract:
Vinothkumar S, Afcons Infrastructures Limited, vinothkumar.s@afcons.com
Sunil S. Basarkar, Afcons Infrastructures Limited, sunil.basarkar@afcons.com
ABSTRACT
Ground Improvement Techniques serves the stability of various foundation by conventional method or advanced method. The Controlled Modulus Column (CMC) called as Rigid Inclusion is a Soil improvement technique to reduce the total or differential settlement by using semi-rigid soil reinforcement columns. The CMC technique can be executed by displacement or non-displacement methods. It does not aim to bypass the compressive layer or to install a pile that will directly support the entire load from the structure. Principle of the technique is to introduce a load transfer platform between the head of the column and structure shall transform a uniform load into soil. Initially, the structural load transmitted into the soil generate the settlement greater than CMC piles. When the settlement between the soil and column became equal at neutral point, maximum structural load shall be balanced by the positive friction and tip resistance to stabilize the foundation without exceed the allowable settlement limit. CMC technique is more effective in all type of layered soil by installing a group of columns in grid pattern to limit the excessive settlement in shorter duration.
This paper describes the behaviour of soil reinforcement with CMC column and their installation process with reference to a project at the Dry Bulk Terminal Port, San Pedro- Abidjan (Western Africa). Methodology of CMC, requirements of Ground Improvement, arrangements and outcome of this method is planned to be part of the proposed paper. Vital lessons learnt are intended to be presented in the paper.
Abstract: Theme 4