Geomechanics and Engineering A
Volume 7, Number 5, 2014, pages 539-552
DOI: 10.12989/gae.2014.7.5.539
Probability-based design charts for stone column-improved ground
Kousik Deb and Anjan Majee
Abstract
A simplified probability-based design charts for stone column-improved ground have been presented based on the unit cell approach. The undrained cohesion (<i>c<sub>u</sub></i>) and coefficient of radial consolidation (<i>c<sub>r</sub></i>) of the soft soil are taken as the most predominant random variables. The design charts are developed to estimate the diameter of the stone column or the spacing between the stone columns by employing a factored design value of <i>c<sub>r</sub></i> and <i>c<sub>u</sub></i> so as to satisfy a specific probability level of the target degree of consolidation and/or a target safe load that needs to be achieved in a specified timeframe. The design charts can be used by the practicing engineers to design the stone column-improved ground by considering consolidation and /or bearing capacity of the improved ground.
Key Words
bearing capacity; consolidation; design charts; probability; stone column-improved ground; uncertainty
Address
Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.