Sensitivity of simplified pile settlement calculations to parameter variation in stiff clay

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Abstract

Pile settlement is a key geotechnical design consideration. The serviceability limit state for deep foundations cannot be ignored and yet many design methods merely assume that large factors of safety are sufficient to prevent excessive settlements. A simple model, supported by previously published databases of load testing on bored piles founded in London clay, is used to make predictions of settlement for bored pile foundations in the same geological deposit. The results of a detailed sensitivity study of the key parameters that affect the performance of bored piled foundations are presented. The parameters studied include: the mobilisation factor; the mobilisation strain; the elastic modulus of the concrete; the undrained shear strength profile; the pile length and the pile diameter. Based on the preliminary results of this sensitivity study, design guidance is presented and a rank of order of the parameters is given in order of their influence on the settlement calculation result. The influence of soil non-linearity is also studied.
Original languageEnglish
Title of host publicationGeotechnical Engineering for Infrastructure and Development
Subtitle of host publicationProceedings XVI European Conference on Soil Mechanics and Geotechnical Engineering
EditorsM G Winter, D M Smith, P J L Eldred, D G Toll
Place of PublicationLondon
PublisherThomas Telford (ICE Publishing)
Pages3777-3782
Number of pages6
Volume7
ISBN (Print)9780727760678
DOIs
Publication statusPublished - 23 Nov 2015
Event16th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2015 - Edinburgh, United Kingdom
Duration: 13 Sep 201517 Sep 2015

Conference

Conference16th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2015
CountryUnited Kingdom
CityEdinburgh
Period13/09/1517/09/15

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