Numerical study of ground movements induced by traditional foundation underpinning
Numerical study of ground movements induced by traditional foundation underpinning
Traditional concrete underpinning is a commonly adopted technique for the construction of basements beneath or beside existing buildings, in congested urban settings. The successful implementation of underpinning schemes places a significant reliance on suitable construction means and methods to limit impacts on neighbouring assets. Case study data regarding the ground movements induced by construction of underpins are very limited. This presents a challenge when assessing the potential impact of underpinning works on nearby existing structures and assets, with practitioners frequently adopting inappropriate empirical relationships based on other construction activities. This paper presents the results of a series of finite element soil-structure interaction analyses, assessing ground movements arising from underpinning of an idealised strip footing foundation. The impact of underpin depth on induced ground movements has been investigated, simulating an idealised construction sequence and considering two typical ground models. Proposed charts of normalised ground movements are presented for use in practice.
J. Woodcock; A. Fasano; A. Nikolic
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
A - New developments on structural design
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