The novel geocell anchor cage system

Department of Civil Engineering, Indian Institute of Science, Bengaluru - 560012, India E-mail: madhavi@iisc.ac.in, web page: www.civil.iisc.ac.in/people/madhavi-latha-g/

Abstract

This study proposes a new technique called ‘Geocell Anchor Cage (GAC)’, in which the geocell reinforcement layer is supported by a structure comprising of a grid and several anchor pins to enhance the overall performance of the geocell layer in reinforcement applications. Plate load tests were carried out on sand beds with a geocell mattress, and a 3D printed polymeric GAC positioned either above or below the mattress, with each geocell pocket reinforced by an anchor pin positioned exactly at the centre. Results revealed that the inclusion of GAC has substantial benefits in terms of increased load-carrying capacity and reduced footing settlements. Among the two tested configurations of GAC, the one in which the GAC is placed below the geocell layer is proved to be more effective, with the settlements reduced by an order of 38%. Based on the response of the geocells measured through pressure sensors and strain gauges, the internal mechanisms responsible for the beneficial effects of GAC are investigated.