Benchmarking of FEM Technique Involving Deep Excavation, Pilesoil Interaction and Embankment Construction

D. E. L. Ong
School of Engineering, Swinburne University of Technology (Sarawak Campus), Malaysia

Keywords: excavation, pile-soil interaction, centrifuge modelling, embankment

ABSTRACT:
Three case studies involving the use of numerical models are presented in this paper. First, a
comparison of FE modelling of a deep excavation is made using 2-D finite element software, SAGE-CRISP and PLAXIS. In the second study, benchmarking is made between results obtained from 2-D FE modelling using PLAXIS and well-established 3-D centrifuge studies for the case of an existing single pile and pile group located nearby to an excavation. Finally, practical application of FEM in the design of a 12-m high hydraulically placed sand-fill embankment is presented to demonstrate the importance of time-dependent analyses. These
benchmarked studies using FEM technique will undoubtedly increase the confidence level of any designer who is involved in the challenging field of geotechnical engineering.

1 Introduction

Benchmarking or verification of a designer’s numerical model to safeguard against carelessness and/or unforeseeable site condition is very important to prevent any untoward incidents. This is especially so in geotechnical engineering due to the variability of subsurface ground conditions, which are largely interpolated from known but limited numbers of soil sampling exercises. It is hoped that this paper will create greater awareness amongst numerical modellers to adopt a prudent attitude to check and re-check their numerical models so as to increase their confidence level, especially in critical geotechnical engineering projects.

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Benchmarking of FEM Technique Involving Deep Excavation, Pilesoil Interaction and Embankment Construction 2011-04-07T12:56:00-07:00 Rating: 4.5 Diposkan Oleh: Andre S