Back analysis of the coefficient of horizontal subgrade reaction from the monitored behaviour of diaphragm walls of Seville’s Underground
DOI:
https://doi.org/10.3989/ic.13.148Keywords:
Coefficient of horizontal subgrade reaction, retaining wall analysis, elasto-plastic springs, Rido, Cype, inclinometers, Seville’s UndergroundAbstract
This paper presents an abacus with the values of the coefficient of horizontal subgrade reaction for retaining wall analysis in Seville. The aforementioned values have been extrapolated from the actual behaviour on site of the retaining walls, monitored with inclinometers, during the different excavation stages. A primary analysis is carried out initially using the calculation programs Plaxis, Rido and Cype and Chadeisson values of the coefficient of horizontal subgrade reaction. The comparison and discussion of the achieved results leads us to conclude that the usual calculations with Rido and Cype are not reliable for accurately predicting the actual behaviour of the retaining walls. Due to that a parametric analysis is carried out, varying the values of the coefficient of horizontal subgrade reaction, until finding those which mach better the measured reality. The obtained results are synthesised in an abacus so that the knowledge learnt through experience can be applied in future works.
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