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Geomechanics and Engineering
  Volume 20, Number 2, January25 2020 , pages 147-154

A novel approach for predicting lateral displacement caused by pile installation
Chao Li, Jin-feng Zou and Lin Li

    A novel approach for predicting lateral displacement caused by pile installation in anisotropic clay is presented, on the basis of the cylindrical and spherical cavities expansion theory. The K0-based modified Cam-clay (K0-MCC) model is adopted for the K0-consolidated clay and the process of pile installation is taken as the cavity expansion problem in undrained condition. The radial displacement of plastic region is obtained by combining the cavity wall boundary and the elastic-plastic (EP) boundary conditions. The predicted equations of lateral displacement during single pile and multi-pile installation are proposed, and the hydraulic fracture problem in the vicinity of the pile tip is investigated. The comparison between the lateral displacement obtained from the presented approach and the measured data from Chai et al. (2005) is carried out and shows a good agreement. It is suggested that the presented approach is a useful tool for the design of soft subsoil improvement resulting from the pile installation.
Key Words
    lateral displacement; pile installation; anisotropic clay; cavity expansion; modified Cam-clay model
Chao Li and Jin-feng Zou: School of Civil Engineering, Central South University, Hunan 410075, China

Lin Li: Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China

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