A method for the prediction of greenfield 3D settlement troughs around deep excavations
A method for the prediction of greenfield 3D settlement troughs around deep excavations
The evaluation of ground movements induced by deep excavations is a topic of considerable importance, especially in the context of urbanized environments. Semi-empirical 2D methods, aimed at a first approximation of the problem, have been developed and widely used in literature to evaluate the settlement profile along retaining wall perpendicular direction whilst less attention has been paid to describe the profile along parallel direction. Recently, a 3D semi-empirical closed-form function, obtained by modifying existing 2D solutions, has been proposed to better grasp the three-dimensional effects induced by excavation. The four independent parameters that define the shape of the settlements and the scale parameter constituting the 3D subsidence function were calibrated through least squares regression of data sets from 3D FEM analyses. This calibration, in the context of a first comparison with real cases, has led to satisfactory and encouraging results revealing dependencies of the parameters on the excavation geometry. This paper is dedicated to the application of this three-dimensional subsidence function to additional real cases of open pit excavations to evaluate the applicability and the possible generalization of the method. Correlations between some of the four independent shape parameters and geometry of the pit are simply outlined.
M. De Luca; Gianpiero Russo; M. V. Nicotera; I. Esposito
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
C - Risk analysis and safety evaluation
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