The effect of long-term consolidation on foundations underpinned by micropiles in soft clay

So far insufficient research has been done on the long-term behavior of micropiles embedded in a clay medium, even though this significant influence expected total settlement. This paper considers square foundation placed bed and tested under vertical loads until reached its bearing capacity. Subsequently, plate was underpinned with four micropiles, load test repeated. These data were used to validate coupled hydraulic-mechanical three-dimensional finite difference model presented paper. In numerical modelling, different transfer scenarios considered simulate approaches adding floors an existing building. Consolidation periods zero months, six five years between application due building, additional storeys considered. The six-month period represents short-term, five-year scenario. Following first consolidation representing storeys, second implemented, such that combined length two years. study, results showed installation immediately after completion is most successful controlling settlement later on.