Abstract
The relationship between the work period and the cost of construction to remediate soft ground generally involves a tradeoff between the two. Curbing the costs of peaty ground consolidation, which is work that is done in a relatively short period, is a technical challenge.
To clarify the effectiveness of low-improvement-rate soil improvement combined with gravel foundation reinforcement, which is a soft-ground improvement technique with excellent construction properties, the experimental construction of an embankment was done and long-term measurements were performed.
This paper reports on the stability of this embankment and the soundness of the geotextile used in it. A parametric study, in which the improvement ratio, the embankment height and the tensile rigidity of geotextile were used as the parameters, was done by using the results of a reproduction based on two-dimensional elastic-plastic FEM analysis of the observation data of the experimental construction.
This parametric study examined the effectiveness of the construction technique in controlling differential settlement. Based on the results of the above examination, a design method for implementing this construction technique was proposed.
