Analyzing the deformation of multilayered saturated sandy soils under large building foundation

Li, C, Xiu, Z, Ji, Y ORCID: https://orcid.org/0000-0003-3003-5071, Wang, F and Chan, AHC 2019, 'Analyzing the deformation of multilayered saturated sandy soils under large building foundation' , KSCE Journal of Civil Engineering .

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Abstract

The generalized plasticity theory has been subject of much research in geomechanics. The Pastor-Zienkiewicz model and its modified versions are among these. For large foundations resting on multilayered soils the actual loading is often non-linear. In this study we developed a new mathematical model which can apply non-linear loading using the subfield of planar mesh method. A sensitivity study was first performed to evaluate the contribution of deformation from various model parameters. It is found that the plastic modulus parameters only have marginal contributions. An engineering case study was used to valid the proposed model and it is evident from measured stresses that the loading of the foundation is non-linear. The deformations calculated by the proposed model agreed well with the monitored deformations. It is also found that the maximum deformation point is not necessarily in the centre of foundation and it does not coincide with the maximum loading point either. The distance between the maximum deformation point and the maximum loading point can be as far as 15.59 m for the bottom layer soil from this case. This research proves the necessity of using non-linear loading to calculate the foundation deformations for large foundations with multilayered saturated soils.

Keywords:large building foundation; Pastor-Zienkiewicz model; sensitivity analysis; foundation deformation; multilayered soils

Item Type: Article
Schools: Schools > School of the Built Environment > Centre for Urban Processes, Resilient Infrastructures & Sustainable Environments (UPRISE)
Journal or Publication Title: KSCE Journal of Civil Engineering
Publisher: Springer
ISSN: 1226-7988
Related URLs:
Funders: National Natural Science Foundation of China
Depositing User: Dr Yingchun Ji
Date Deposited: 16 May 2019 07:51
Last Modified: 16 May 2019 08:00
URI: http://usir.salford.ac.uk/id/eprint/51342

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